IndraLab

Statements


ISG15 affects USP18
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ISG15 binds USP18.
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"Finally,Structure of free and ISG15-bound USP18 (A) Overall structure of USP18 (pdb code 5cht) showing the three-domain architecture with finger, thumb and palm domains."

No evidence text available

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"Since the interaction surfaces in the USP18ISG15 complex are well conserved between human and murine proteins, we tested whether the ISG15-PA active site probes label USP18 across species."

sparser
"There are two USP18ISG15 complexes in the asymmetric unit."

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"In both molecules of unbound USP18 the imidazole of His314 is slightly shifted away from Cys61 weakening the interaction of the two side chains.Figure 2: (a) Structural alignment of both USP18ISG15 complexes present in the asymmetric unit."

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"Therefore, the α-helix must unwind and the loop needs to change its conformation to allow for ISG15 binding.Finally, the catalytic triad in ISG15-bound USP18 is formed by small movements of all three residues (His314, Asn331, Cys61) involved (Fig. 1b-d)."

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"For the structure of the USP18ISG15 complex the structures of unbound USP18 and murine ISG15 were used as search model in molecular replacement trials with Phaser."

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"(a) Structure of the USP18-ISG15 complex."

sparser
"As such, the USP18:ISG15 interaction is a potentially attractive target for small molecule-based short-term treatments to boost endogenous IFN activity."

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"In human cells, binding of ISG15 to USP18 increases USP18 levels by preventing its degradation [29] , further reinforcing the inhibition of IFN receptor signaling."
USP18 binds ISG15 and UBL. 4 / 4
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"Structural data demonstrated that only the ISG15 C-terminal but not the N-terminal UBL domain binds USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., 2017)."

sparser
"However, only the C-terminal Ubl domain of ISG15 interacts with USP18 whereas no interaction between the N-terminal Ubl domain and USP18 was detected and the presence of the N-terminal domain of ISG15 is dispensable for the deISGylation activity of USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., xref )."
USP18 binds ISG15 and Arg151. 2 / 2
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"A structural overlay of unbound USP18 and the USP18ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short α-helix of unbound USP18 (Fig. 3b)."

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"A structural overlay of unbound USP18 and the USP18 and ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short alpha-helix of unbound USP18 (XREF_FIG)."
ISG15 activates USP18.
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ISG15 activates USP18. 10 / 18
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"Decreasing ISGylation by knockdown of the ISG15 E1 enzyme, Ube1L, in primary USP18(+/+) and USP18(−/−) hepatocytes led to increased MHV-3 replication."

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"USP18 exerts a negative regulatory effect on type I interferon signalling by competing with JAK1 for IFNAR2 binding, and mutations in USP18 and ISG15, which directly regulates USP18 stability, result in aberrant type I interferon induction in humans ."
| PMC

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"ISG15 prevents the degradation of USP18 by sphingosine kinase 2 (SPK2) [XREF_BIBR, XREF_BIBR]."
| PMC

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"Recently, we found that prolonged exposure to IFN-λ up-regulates U-ISGF3 and U-ISGs, including ISG15, and that ISG15 causes the refractoriness to exogenous IFN-α treatment by stabilizing USP18 protein [60]."

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"ISG15 silencing decreased the amount of USP18 protein in recombinant IFN-lambda4-treated cells, and the protein level of USP18 was restored not only by transfection of wild type (WT) ISG15 gene but also by transfection of conjugation defective ISG15 AA mutant gene."

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"Stronger association of human USP18 and ISG15 enhances the stability of USP18, prolonging this inhibitory effect in humans, but not in mice."

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"Indeed, individuals lacking ISG15 expressed lower levels of Ubl carboxy-terminal hydrolase 18 (USP18), which was rescued by complementation with either wild-type or a non-conjugatable form of ISG15 (ref."

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"Interestingly, Speer et al. have demonstrated that ISG15-mediated USP18 stabilization occurs in humans but not mice, and mice can regulate the IFN response in the absence of ISG15."

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"Moreover, we confirm that ISG15 promotes USP18 accumulation independently of conjugation 8."

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"ISG15 is known to promote USP18-mediated inhibition of type I 437 IFN signaling by stabilizing USP18 activity and preventing its proteasomal degradation(Zhang et 438 al., 2015), underscoring the role of ISG15 as a negative regulator of type I IFN responses when 439 co-upregulated with USP18."
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ISG15 inhibits USP18.
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"However, by de-conjugating ISG15, the virus also creates free ISG15, which in turn may affect the immune response in two opposite pathways: free ISG15 negatively regulates IFN signaling in humans by binding non-catalytically to USP18, yet at the same time free ISG15 can be secreted from the cell and induce the IFN pathway of the neighboring cells."

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"In a follow-up report, Zhang et al. show that the absence of intracellular ISG15 in patients ' cells also prevents the accumulation of USP18, a potent negative regulator of type I IFN [XREF_BIBR]."

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"We further show that an absence of intracellular ISG15 in the patients ' cells prevents the accumulation of USP18 XREF_BIBR, XREF_BIBR, a potent negative regulator of IFN-alpha and beta signalling, resulting in the enhancement and amplification of IFN-alpha and beta responses."

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"Recently, human ISG15 deficiency was found to cause a decrease in USP18 accumulation and this was hypothesized to cause the loss of negative feedback of type I interferon signaling in these patients leading to auto-inflammation [XREF_BIBR]."

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"ISG15 is known to promote USP18-mediated inhibition of type I 437 IFN signaling by stabilizing USP18 activity and preventing its proteasomal degradation(Zhang et 438 al., 2015), underscoring the role of ISG15 as a negative regulator of type I IFN responses when 439 co-upregulated with USP18."
| DOI

eidos
"In turn , ISG15 prevents USP18 from being degraded by the proteasome ."

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"ISG15 prevents degradation of IFNAR’s negative regulator USP18, and as a result, type I IFN signaling is strongly enhanced in the absence of ISG15 (119, 120)."

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"This lack of intracellular free ISG15 prevents the accumulation of USP18, a known negative regulator of IFN-alpha and beta, resulting in enhanced IFN-alpha and beta immunity and autoinflammation, resembling Aicardi-Goutieres syndrome and spondyloenchondromatosis [XREF_BIBR, XREF_BIBR, XREF_BIBR]."

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"We therefore analysed the impact of ISG15 on SKP2 mediated USP18 degradation."

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"The authors also showed that intracellular ISG15 deficiency prevented ubiquitin specific peptidase 18 (USP18) accumulation."
ISG15 decreases the amount of USP18.
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ISG15 decreases the amount of USP18. 3 / 3
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"ISG15 appeared to act in its unconjugated free form, since silencing of UBE1L or of other ISGylation enzymes failed to reduce USP18 levels (XREF_FIG and XREF_FIG) and patients ' cells transduced with wild-type ISG15 or ISG15 (DeltaGG) exhibited attenuated levels of interferon-stimulated-gene transcripts and proteins (XREF_FIG and XREF_FIG)."

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"These data indicate that intracellular free ISG15 downregulates the IFN-alpha and beta response by maintaining levels of the negative-feedback regulator USP18."

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"We found that ISG15 deficiency led to reduced levels of the negative regulator USP18 because of increased proteolysis due, at least in part, to SKP2 mediated ubiquitination, resulting in stronger responses to IFN-alpha and beta and an ensuing amplification of IFN-alpha and beta-induced responses."
Modified ISG15 decreases the amount of USP18. 2 / 2
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"As expected from the previous study 10, silencing ISG15 expression decreased the protein level of USP18 in IFN-lambda4-transfected cells."

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"As expected from the previous study10, silencing ISG15 expression decreased the protein level of USP18 in IFN-λ4-transfected cells (Fig. 5C)."
ISG15 increases the amount of USP18.
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ISG15 increases the amount of USP18. 3 / 3
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"Here we studied the role of ISG15-specific ubiquitin-like protease 43 (USP18) in HIV-1 innate immune sensing.HIV-1 infection induces the expression of USP18 in PMA-differentiated THP-1 cells."
| PMC

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"ISG15 silencing decreased the amount of USP18 protein in recombinant IFN-λ4-treated cells, and the protein level of USP18 was restored not only by transfection of wild type (WT) ISG15 gene but also by transfection of conjugation-defective ISG15 AA mutant gene (Supplementary Fig. 8A)."

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"ISG15 silencing decreased the amount of USP18 protein in recombinant IFN-lambda4-treated cells, and the protein level of USP18 was restored not only by transfection of wild type (WT) ISG15 gene but also by transfection of conjugation defective ISG15 AA mutant gene."
ISG15 deubiquitinates USP18.
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ISG15 leads to the deubiquitination of USP18. 2 / 2
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"The non-covalent interactions of ISG15 and USP18 prevent the ubiquitination of USP18 by S-phase kinase-associated protein two and stabilize the downregulation of the IFN signaling pathway by USP18 (Tokarz et al., 2004; Zhang et al., 2015)."

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"The coexpression of either wild-type ISG15 or ISG15 (DeltaGG) with USP18 and ubiquitin resulted in markedly lower levels of USP18 ubiquitination (XREF_FIG, lanes 9-11 and XREF_FIG) and larger total amounts of USP18.Overall, these data indicate that free intracellular ISG15 antagonizes USP18 ubiquitination and degradation, thereby promoting the stability and function of this protein."
USP18 affects ISG15
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USP18 binds ISG15.
3 1 | 70 113
3 1 | 68 109

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"Finally,Structure of free and ISG15-bound USP18 (A) Overall structure of USP18 (pdb code 5cht) showing the three-domain architecture with finger, thumb and palm domains."

No evidence text available

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"Since the interaction surfaces in the USP18ISG15 complex are well conserved between human and murine proteins, we tested whether the ISG15-PA active site probes label USP18 across species."

sparser
"There are two USP18ISG15 complexes in the asymmetric unit."

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"In both molecules of unbound USP18 the imidazole of His314 is slightly shifted away from Cys61 weakening the interaction of the two side chains.Figure 2: (a) Structural alignment of both USP18ISG15 complexes present in the asymmetric unit."

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"Therefore, the α-helix must unwind and the loop needs to change its conformation to allow for ISG15 binding.Finally, the catalytic triad in ISG15-bound USP18 is formed by small movements of all three residues (His314, Asn331, Cys61) involved (Fig. 1b-d)."

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"For the structure of the USP18ISG15 complex the structures of unbound USP18 and murine ISG15 were used as search model in molecular replacement trials with Phaser."

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"(a) Structure of the USP18-ISG15 complex."

sparser
"As such, the USP18:ISG15 interaction is a potentially attractive target for small molecule-based short-term treatments to boost endogenous IFN activity."

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"In human cells, binding of ISG15 to USP18 increases USP18 levels by preventing its degradation [29] , further reinforcing the inhibition of IFN receptor signaling."
USP18 binds ISG15 and UBL. 4 / 4
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sparser
"Structural data demonstrated that only the ISG15 C-terminal but not the N-terminal UBL domain binds USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., 2017)."

sparser
"However, only the C-terminal Ubl domain of ISG15 interacts with USP18 whereas no interaction between the N-terminal Ubl domain and USP18 was detected and the presence of the N-terminal domain of ISG15 is dispensable for the deISGylation activity of USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., xref )."
USP18 binds ISG15 and Arg151. 2 / 2
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"A structural overlay of unbound USP18 and the USP18ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short α-helix of unbound USP18 (Fig. 3b)."

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"A structural overlay of unbound USP18 and the USP18 and ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short alpha-helix of unbound USP18 (XREF_FIG)."
USP18 activates ISG15.
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USP18 activates ISG15. 10 / 14
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"However divergent, ISG15 removal is nevertheless exclusively mediated by USP18 in humans, mice, and zebrafish."

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"Other key negative feedback regulators are ubiquitin-specific peptidase 18 (USP18) and interferon stimulated gene 15 (ISG15) (Figure 2)."

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"USP18 can increase HBV susceptibility by removing isopeptidase activity of ISG15 and promoting HBV replication by downregulating the I-IFN signal transduction pathway."

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"The absence of USP18 strengthens the signaling of IFN-I and IFN-III; 1,2 and is associated with prolonged Janusactivated kinase/signal transducer and activator of In addition, absence of USP18, which cleaves ISG15 from its target protein, prolongs ISG15-mediated ISGylation."

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"Further investigation with the KEGG pathway enrichment analysis showed those up-regulated genes could cause the activation of the IFN-induced pathway, type II interferon signaling pathway, and regulation of protein ISGylation by the ISG15 deconjugating enzyme USP18 pathway (Figure 4B)."

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"Our data are consistent with this mechanism, since the blunting of hepatocyte IFN signaling after exposure to inflammatory stimuli is independent of USP18 mediated removal of ISG15 from its target proteins."

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"Usp18 deficient cells have enhanced IFN-alpha and beta signaling and more ISG15 modified proteins."

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"Notably, PBMCs infected with moderate EV-A71 showed a stronger response than the mild and severe isolates, specifically interferon-stimulated gene 15 (ISG15), viperin (RSAD2), ubiquitin specific peptidase 18 (USP18), interferon alpha inducible protein 27 (IFI27), and guanosine monophosphate reductase (GMPR) (Fig. 3c)."

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"In addition, absence of USP18, which cleaves ISG15 from its target protein, prolongs ISG15 mediated ISGylation."

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"At later stages, USP18 mediated de-ISGylation releases free ISG15, which in turn stabilizes USP18 and tunes down IFN-alpha and beta signalling and inflammation."
USP18 inhibits ISG15.
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"Finally, USP18 (an ISG15 specific isopeptidase enzyme) can reverse ISG15 conjugation of target proteins."

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"USP18 is the main ISG15 isopeptidase and can inhibit 593 ISG15-mediated ISGylation and can repress the establishment of an antiviral state (Honke et al., 594 2016; Ketscher et al., 2015)."
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"Immunoprecipitation (IP) assays confirmed that ISG15 directly complexed with PTEN protein and this conjugation was attenuated by engineered overexpression of USP18."

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"In particular, replacement of the Ala138 in USP18 by a polar residue in other USPs might block the access of the bulky and hydrophobic Trp121 side chain of ISG15 (XREF_FIG)."

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"As expected, USP18 silencing dramatically decreased USP18 protein and increased the free ISG15 protein compared to the control group (XREF_FIG)."

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"Here, a clear negative feedback loop can be observed, in which Ubiquitin like protein ISG15 (G1P2) induces IFN-gamma expression while Ubl carboxyl-terminal hydrolase 18 (USP18) inhibits G1P2 activity, explaining the observed down-regulation state of IFN-gamma."

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"In particular, replacement of the Ala138 in USP18 by a polar residue in other USPs might block the access of the bulky and hydrophobic Trp121 side chain of ISG15 (Fig. 4d)."

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"ISG15 conjugation (ISGylation) can be reversed by the IFN-a/b-induced isopeptidase (USP18) that cleaves ISG15 from target proteins 4 ."

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"USP18 activity reduces ISG15 protein conjugation and promotes tumorigenesis if an oncogenic substrate is stabilized by USP18."

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"Inhibiting USP18, the negative regulator of ISGylation, has been shown in both cell line and invivo systems to enhance ISG15 conjugation (Ketscher et al., 2015)."
USP18 decreases the amount of ISG15.
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USP18 decreases the amount of ISG15. 3 / 3
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"As expected, incubation with purified USP18 decreased ISG15 conjugates and increased levels of free ISG15 [88]."

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"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."

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"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."
USP18 affects IFNAR2
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USP18 binds IFNAR2.
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"The ISG ubiquitin specific peptidase 18 (USP18) binds to IFNAR2, preventing it from recruiting signal transducer and activator of transcription 1 (STAT1)."

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"In STAT2-deficient cells, the USP18-mediated inhibition of type I interferon signalling was reduced and the interaction between IFNAR2 and USP18 was weakened pointing to an essential role of STAT2 in USP18-mediated inhibition of the type I interferon signalling pathway [58]."

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"Consistent with this, deletion of the STAT2 binding site on IFNAR2 reduced the binding of USP18 to IFNAR2 [50]."

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"These results established that USP18 independently interacts with IFNAR2 and STAT2."

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"While it was first suggested that USP18 binding to IFNAR2 does not compete with ternary complex formation between IFNAR1, IFNAR2 and IFNα2 [56]."

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"Furthermore, Usp18 functions in the type I IFN pathway by down-regulating the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway independently of its isopeptidase activity through an interaction between Usp18 and the IFNAR2 subunit of the type I IFN receptor complex, while neither IFNAR1 nor IFNGR1 (type II IFN) receptor subunits were able to interact with Usp18 ( xref )."

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"We assume that recruitment of USP18 to IFNAR2 via STAT2 promotes the otherwise weak interaction of USP18 with a membrane proximal site of IFNAR2."

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"Moreover, STAT2 can serve as an adaptor to bridge the interaction between USP18 and IFNAR2, which inhibits ligand binding to the receptor, resulting in decreased receptor dimerization and signaling ( xref )."

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"Gruber and colleagues confirmed this in coimmunoprecipitation experiments in transiently transfected U6A cells overexpressing WT or STAT2-R148Q and USP18, showing a reduced interaction between USP18 and IFNAR2 in the presence of STAT2-R148Q (Fig. 3) [57]."

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"Specifically, murine USP18 can bind to human IFNAR2 and block type I IFN signaling by competitively interfering with Jak1 binding to the receptor [ xref ]."
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"Mapping the STAT2 and USP18 binding to IFNAR2 by cell micropatterning of further deletions and mutations ( xref ) confirmed aa 418-444 of IFNAR2 as a minimal interaction site for STAT2 and USP18."

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"Based on our previous report xref and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

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"Binding of STAT2 and USP18 to IFNAR2 is synergistic, in line with the previous observation that the STAT2-IFNAR2 interaction was strengthened by USP18 xref ."

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"USP18 also interacts with IFNAR2 and STAT2 to block type I interferon signalling in a protease-independent manner."

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"These results established that USP18 independently interacts with IFNAR2 and STAT2."

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"USP18 binds STAT2 and IFNAR2, displacing JAK1 from the cytoplasmic domain of IFNAR2 and inducing a conformational change in the IFN-IFNAR1-IFNAR2 complex, leading to impaired signal transduction (left)."

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"The reported interactions between USP18 and IFNAR2 as well as STAT2 remain to be characterised biochemically and structurally."

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"More detailed analysis of the interaction dynamics of the STAT2IFNAR2 interaction in the presence of USP18 by FRAP ( xref ) revealed a dissociation rate constant of 0.015 ± 0.005 s −1 ."

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"We next examined IFNAR2-independent interaction of STAT2 and USP18 in IFNAR2-deficient U5A cells by using cell micropatterning."

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"Taken together, our data suggest that USP18 simultaneously interacts with IFNAR2 via STAT2 in the membrane distal region and directly in the membrane-proximal region ( xref )."
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"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR ( xref )."

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"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR (81)."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
USP18 inhibits IFNAR2.
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USP18 inhibits IFNAR2. 1 / 3
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"In addition to its isopeptidase activity, USP18 negatively regulates type I and type III IFN signalling by blocking the IFNAR2 subunit of the interferon receptor ."
USP18 activates IFNAR2.
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USP18 activates IFNAR2. 2 / 3
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"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR (81)."

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"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR."
USP18 affects Interferon
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USP18 inhibits Interferon.
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"For instance, human ubiquitin specific peptidase 18 (USP18) negatively regulates type-I IFN signaling by binding to the IFN receptor."

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"Recent data by Zhang and coworkers revealed, however, that USP18 attenuates JAK-STAT signaling, and thereby the type 1 IFN response, in a non enzymatic manner, i.e., by directly competing with JAK1 for binding to the IFNAR2 subunit of the type 1 IFN receptor."

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"These observations established the key role of STAT2 in USP18 mediated inhibition of IFN signaling and moreover suggest that the increased STAT2 levels induced by IFN signaling may further enhance negative feedback by USP18."

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"Besides being an active enzyme, USP18 negatively regulates type I interferon signalling independent of its protease activity [22] (Figure 1)."

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"CRISPR and Cas9 knockout of USP18 enhances type I IFN responsiveness and restricts HIV-1 infection in macrophages."

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"Influenza B has evolved a mechanism to directly neutralize ISG15 with its NS1 protein 24 and coronaviruses have a papain-like protease that has deISGylase activity as a strategy to overcome ISG15, 25, 26 indicating the importance of ISG15 in the antiviral response.In addition to its enzymatic activity, USP18 negatively regulates T1 IFN signaling."

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"Given that USP18 suppresses type I IFN signaling and that the mutation in Usp18 Ity9 mice lies within the IFNAR2 binding region of USP18, as well as the importance of type I IFN signaling in bacterial infection, we sought to determine if the IFNAR regulatory function of USP18 is compromised in Usp18 Ity9 mice and whether hyperactivation of type I IFN signaling contributes to the pathogenesis of infection."

eidos
"USP18 down-regulates type I interferon signaling by blocking the access of Janus-associated kinase 1 ( JAK1 ) to the type I interferon receptor ."

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"USP18 regulates antiviral responses by removing ISG15 conjugates and can directly inhibit type I IFN receptor signaling by binding the subunit 2 of the receptor via STAT-2 XREF_BIBR, XREF_BIBR."

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"A majority of these genes are responsible for the regulation and control of early innate inflammation, such as USP18, which disrupts the JAK-STAT pathway downstream of the IFN receptor (43), and TIFAB, which inhibits the activation of the NF-κB pathway (44)."
USP18 bound to IFNAR2 inhibits Interferon. 2 / 2
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"USP18 directly binds to IFN-alpha and beta receptor 2 (IFNAR2) in human KT-1 cells and, by competing for JAK1 binding, inhibits type I IFN signaling."

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"Indeed, USP18 binds to IFNAR2 to inhibit type I IFN signaling and subsequently disrupting IFNAR2-JAK1 interaction, thus negatively regulating IFN signaling cascades [XREF_BIBR]."
USP18 bound to JAK1 inhibits Interferon. 2 / 2
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"Based on mutational studies it was suggested that USP18 binds to the intracellular region of type I IFN receptor subunit IFNAR2 and outcompetes the downstream kinase JAK1 thereby abrogating IFN signaling XREF_BIBR."

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"Based on mutational studies it was suggested that USP18 binds to the intracellular region of type I IFN receptor subunit IFNAR2 and outcompetes the downstream kinase JAK1 thereby abrogating IFN signaling36."
USP18 bound to IFNA inhibits Interferon. 1 / 1
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"The binding of USP18 with the IFN-α receptor has been shown to inhibit the interaction of STAT-1 with the IFN-α receptor and thus block downstream IFN signaling (12, 15)."
USP18 activates Interferon.
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"To ascertain that this enhanced type 1 IFN response with up-regulation of ISG expression was indeed caused by USP18 deficiency, we transduced USP18 deficient fibroblasts from P1 and P2 and control fibroblasts with lentiviral particles (LV)-expressing luciferase (Luc) or WT USP18."

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"We have previously shown that USP18 can modulate the type 1 IFN response."

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"The role of Usp18 mediated de-ISGylation in IFN stimulated cells -- when it occurs and what happens if it does not occur -- remains uncertain, and these questions are complicated by the fact that Usp18 has a second function in innate immune responses unrelated to deconjugation."

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"ISG15 has also been shown to regulate type I interferon signalling by stabilizing USP18 (ref.4) and by interacting with leucine-rich repeat-containing protein 25 (LRRC25) to mediate the autophagic degradation of retinoic acid-inducible gene I protein (RIG-I; also known as DDX58)41."

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"Further investigation with the KEGG pathway enrichment analysis showed those up-regulated genes could cause the activation of the IFN-induced pathway, type II interferon signaling pathway, and regulation of protein ISGylation by the ISG15 deconjugating enzyme USP18 pathway (Figure 4B)."

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"Influenza B has evolved a mechanism to directly neutralize ISG15 with its NS1 protein24 and coronaviruses have a papain‐like protease that has deISGylase activity as a strategy to overcome ISG15,25, 26 indicating the importance of ISG15 in the antiviral response.In addition to its enzymatic activity, USP18 negatively regulates T1 IFN signaling.27 USP18 is recruited by STAT2 to the type I IFN receptor subunit, IFNAR2, where it binds to IFNAR2 and prevents phosphorylation of JAK1 by blocking the interaction of JAK1 and the IFNAR2 subunit.27, 28, 29 USP18 expression also plays a role in limiting TRAIL‐induced apoptosis and has also been shown to regulate the susceptibility of certain cancer cells to IFN‐α and drug‐induced apoptosis.30, 31Macrophages play an important role in HIV‐1 as reservoirs and can contribute directly to HIV‐1 pathogenesis.32 HIV‐1 in the ART era can be seen as a chronic disease characterized by chronic immune activation and chronic inflammation with a higher risk of non‐AIDS‐related morbidities and mortalities."

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"Furthermore, XREF_BIBR demonstrated that USP18 upregulated and blocked IFN stimulated gene expression to affect the innate immunity in LPS induced hepatocytes."

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"Further research from our group indicated that silencing USP18 potentiated IFN anti-HCV activity through activation of the Jak and STAT signaling pathway [XREF_BIBR]."

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"These findings seem to conflict with the initial studies of USP18-mediated IFN densensitization in which IFN-β was employed (103, 105, 107) ."

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"More likely, however, these cells contain high levels of factors that inhibit type I but not type III IFN receptor signaling such as USP18, SOCS1 and SOCS3."
USP18 bound to Interferon activates Interferon. 1 / 1
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"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling, we investigated a potential interaction of Usp18 with the IFN-lambda specific receptor subunit IL-28R1."
USP18 bound to IFN receptor activates Interferon. 1 / 1
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"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling, we investigated a potential interaction of Usp18 with the IFN-lambda specific receptor subunit IL-28R1."
USP18 binds Interferon.
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"Interestingly, a high level of USP18 expression has been associated with non-response to IFN treatment ( xref )."

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"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling, we investigated a potential interaction of Usp18 with the IFN-lambda specific receptor subunit IL-28R1."

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"Baseline USP18 IFN -N levels are associated with both virological and serological response, and have the potential to become a clinical predictor for treatment outcomes in HBeAg-positive CHB patients before initiating IFN-α therapy."

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"USP18 is an inhibitor of IFN signaling xref , xref that is up regulated in chronic HCV infection, and lower levels of USP18 are associated with suppression of viral replication in vitro and a beneficial response to IFN in patients xref , xref ."

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"To exert its function as a negative regulator, USP18 binds to the IFN receptor/JAK complex and attenuates the magnitude of the response ( xref ; xref ; xref )."
| 2

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [107]."

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [ xref ]."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
USP18 increases the amount of Interferon.
| 2
USP18 increases the amount of Interferon. 2 / 2
| 2

reach
"USP18 upregulates the expression and production of type I interferon following infection with Sendai virus (SeV) or Encephalomyocarditis virus (EMCV)."

reach
"The IFN signal is controlled by the negative regulator USP18, limiting the expression of interferon-stimulated genes (ISGs)."
USP18 affects STAT2
| 22 59
USP18 binds STAT2.
| 20 59
| 20 46

sparser
"Whilst this STAT2:USP18 interaction has been shown to be essential for negative regulation of type I IFN signaling in vitro ( xref ), its significance in vivo has not previously been examined."

sparser
"This structural insight may be relevant to efforts to therapeutically interfere with the STAT2:USP18 interaction in order to promote the antiviral action of IFNs."

reach
"Based on our previous report 21 and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

reach
"Together, these results establish that the interaction between USP18 and STAT2 mediates the inhibitory effect of USP18 on type I IFN receptor assembly and signaling."

sparser
"Consistent with our suspicion that this might impair the STAT2:USP18 interaction through electrostatic or steric hindrance, co-immunoprecipitation experiments in U6A cells stably expressing WT or STAT2 R148W demonstrated a significant reduction of USP18 pull-down with STAT2 R148W compared to WT ( xref ), providing a molecular mechanism for the USP18 insensitivity of patient cells."

reach
"These results established that the interaction of USP18 and STAT2 is responsible for recruitment of USP18 to IFNAR2 and is critical for the negative effect of USP18 on type I IFN induced JAK1 phosphorylation (XREF_FIG), which is upstream of type I IFN induced STAT1 activation."

sparser
"To explore whether the STAT2-USP18 interaction is important for the effect of USP18 on ligand binding and ternary complex formation, ligand binding assays in U6A cells were performed."

sparser
"In absence of STAT2 binding of USP18 was weakened such as no significant recruitment of USP18 to micropatterned IFNAR2 was detectable in this experimental system."

sparser
"To quantify the interaction between STAT2 and USP18 in live cells, a cell micropatterning approach for spatially controlled immobilization of bait proteins in the plasma membrane via the HaloTag xref was employed ( xref )."

reach
"Together, these different approaches clearly established that STAT2 directly binds to USP18."
| 10

sparser
"Mapping the STAT2 and USP18 binding to IFNAR2 by cell micropatterning of further deletions and mutations ( xref ) confirmed aa 418-444 of IFNAR2 as a minimal interaction site for STAT2 and USP18."

sparser
"Based on our previous report xref and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

sparser
"Binding of STAT2 and USP18 to IFNAR2 is synergistic, in line with the previous observation that the STAT2-IFNAR2 interaction was strengthened by USP18 xref ."

sparser
"USP18 also interacts with IFNAR2 and STAT2 to block type I interferon signalling in a protease-independent manner."

sparser
"These results established that USP18 independently interacts with IFNAR2 and STAT2."

sparser
"USP18 binds STAT2 and IFNAR2, displacing JAK1 from the cytoplasmic domain of IFNAR2 and inducing a conformational change in the IFN-IFNAR1-IFNAR2 complex, leading to impaired signal transduction (left)."

sparser
"The reported interactions between USP18 and IFNAR2 as well as STAT2 remain to be characterised biochemically and structurally."

sparser
"More detailed analysis of the interaction dynamics of the STAT2IFNAR2 interaction in the presence of USP18 by FRAP ( xref ) revealed a dissociation rate constant of 0.015 ± 0.005 s −1 ."

sparser
"We next examined IFNAR2-independent interaction of STAT2 and USP18 in IFNAR2-deficient U5A cells by using cell micropatterning."

sparser
"Taken together, our data suggest that USP18 simultaneously interacts with IFNAR2 via STAT2 in the membrane distal region and directly in the membrane-proximal region ( xref )."
| 2

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [107]."

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [ xref ]."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
USP18 inhibits STAT2.
| 1
USP18 inhibits STAT2. 1 / 2
| 1

reach
"XREF_BIBR, XREF_BIBR To asses whether STAT1 or STAT2, which are both upregulated by USP18 inhibition (XREF_FIG), are implicated in the upregulation of Bim, DP5 and PUMA mRNA expression in USP18 silenced cells, we inhibited in parallel USP18 and STAT1 or STAT2 in INS-1E cells by use of specific siRNAs."
USP18 dephosphorylates STAT2.
| 1
USP18 leads to the dephosphorylation of STAT2. 1 / 1
| 1

reach
"USP18 acts to prevent JAK1 from binding to IFN-I receptor and hence arrests phosphorylation of STAT1 and STAT2, essential components of the transcription factor complex that induces ISGs."
STAT2 affects USP18
| 22 59
STAT2 binds USP18.
| 20 59
| 20 46

sparser
"Whilst this STAT2:USP18 interaction has been shown to be essential for negative regulation of type I IFN signaling in vitro ( xref ), its significance in vivo has not previously been examined."

sparser
"This structural insight may be relevant to efforts to therapeutically interfere with the STAT2:USP18 interaction in order to promote the antiviral action of IFNs."

reach
"Based on our previous report 21 and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

reach
"Together, these results establish that the interaction between USP18 and STAT2 mediates the inhibitory effect of USP18 on type I IFN receptor assembly and signaling."

sparser
"Consistent with our suspicion that this might impair the STAT2:USP18 interaction through electrostatic or steric hindrance, co-immunoprecipitation experiments in U6A cells stably expressing WT or STAT2 R148W demonstrated a significant reduction of USP18 pull-down with STAT2 R148W compared to WT ( xref ), providing a molecular mechanism for the USP18 insensitivity of patient cells."

reach
"These results established that the interaction of USP18 and STAT2 is responsible for recruitment of USP18 to IFNAR2 and is critical for the negative effect of USP18 on type I IFN induced JAK1 phosphorylation (XREF_FIG), which is upstream of type I IFN induced STAT1 activation."

sparser
"To explore whether the STAT2-USP18 interaction is important for the effect of USP18 on ligand binding and ternary complex formation, ligand binding assays in U6A cells were performed."

sparser
"In absence of STAT2 binding of USP18 was weakened such as no significant recruitment of USP18 to micropatterned IFNAR2 was detectable in this experimental system."

sparser
"To quantify the interaction between STAT2 and USP18 in live cells, a cell micropatterning approach for spatially controlled immobilization of bait proteins in the plasma membrane via the HaloTag xref was employed ( xref )."

reach
"Together, these different approaches clearly established that STAT2 directly binds to USP18."
| 10

sparser
"Mapping the STAT2 and USP18 binding to IFNAR2 by cell micropatterning of further deletions and mutations ( xref ) confirmed aa 418-444 of IFNAR2 as a minimal interaction site for STAT2 and USP18."

sparser
"Based on our previous report xref and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

sparser
"Binding of STAT2 and USP18 to IFNAR2 is synergistic, in line with the previous observation that the STAT2-IFNAR2 interaction was strengthened by USP18 xref ."

sparser
"USP18 also interacts with IFNAR2 and STAT2 to block type I interferon signalling in a protease-independent manner."

sparser
"These results established that USP18 independently interacts with IFNAR2 and STAT2."

sparser
"USP18 binds STAT2 and IFNAR2, displacing JAK1 from the cytoplasmic domain of IFNAR2 and inducing a conformational change in the IFN-IFNAR1-IFNAR2 complex, leading to impaired signal transduction (left)."

sparser
"The reported interactions between USP18 and IFNAR2 as well as STAT2 remain to be characterised biochemically and structurally."

sparser
"More detailed analysis of the interaction dynamics of the STAT2IFNAR2 interaction in the presence of USP18 by FRAP ( xref ) revealed a dissociation rate constant of 0.015 ± 0.005 s −1 ."

sparser
"We next examined IFNAR2-independent interaction of STAT2 and USP18 in IFNAR2-deficient U5A cells by using cell micropatterning."

sparser
"Taken together, our data suggest that USP18 simultaneously interacts with IFNAR2 via STAT2 in the membrane distal region and directly in the membrane-proximal region ( xref )."
| 2

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [107]."

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [ xref ]."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
STAT2 inhibits USP18.
| 2
STAT2 inhibits USP18. 2 / 2
| 2

reach
"In addition, STAT2 CC/DB 3A, but not STAT2 CC/DB, partially blocked the effect of USP18 on transcription of ISGs, such as GBP1 and IFIT1 (XREF_FIG and XREF_SUPPLEMENTARY)."

reach
"Additionally, a homozygous miss-sense mutation in STAT2 results in failure to appropriately traffic USP18 to IFNAR2 and prevents USP18 from negatively regulating responses to IFN-Is, which leads to infant death from autoinflammation disease (168)."
Interferon affects USP18
| 6 53 7
Interferon activates USP18.
| 6 42
| 6 42

reach
"Finally, we assessed IFN induced USP18 accumulation in cells silenced for SKP2."

reach
"Model fitting results and the parameter analysis.Pulsatile IFN-a treatment induces higher ISG expression in single cells.Heterogeneous delays in USP18 upregulation by IFN were observed in single cells."

reach
"The increased expression of dsRNA receptor TLR3 and IFN induced genes ISG56, ISG43, Mx1 and IFIT3 after stimulation with poly I : C mimicking a viral infection indicates that these cell lines can be used as effective in vitro models to study the bat 's innate immune responses to virus infection XREF_BIBR, XREF_BIBR."

reach
"ISG15 is removed from substrates by interferon-induced ubiquitin-specific peptidase 18 or severe acute respiratory syndrome coronavirus 2‒derived papain-like protease."

reach
"USP18 protein accumulated with similar kinetics in cells treated with IFN beta or IFN lambda1, reaching maximum level between 8 and 16 hr of stimulation (XREF_FIG)."

reach
"These IFN system genes include the dsRNA signal sensing factor TLR3, IFN, IFN signal transduction factor STAT1, IFN regulatory factor IRF7, putative IFN antiviral effectors Mx1, Mx2, PKR like, Viperin, IFI56, and other IFN stimulated genes (ISGs) IFI58, ISG15-1, ISG15-2, USP18, Gig1 and Gig2."

reach
"Such increased expression is likely due to the enhanced type I IFN signaling in Usp18 Ity9 mice since ISG15 is a well-known IFN inducible gene."

reach
"IFNAR2 (part of the type I IFN receptor complex (Fig. 2)) interacts directly with the IFN-induced protein Usp18, which inhibits the response to IFN-α10 but not to IFN-β or IFN-λ11,12, thereby creating, at least in human cells, a negative feedback loop for IFN-α."

reach
"The in vitro IFN induced USP18 mRNA change (USP18 IFN -N) was measured via comparison of quantitative PCR determined USP18 transcription levels of BPMCs cultured with and without IFN stimulation."

reach
"Given that type I IFN has been shown to induce IL-10 in a STAT1 dependent manner,, we examined whether the increase in type I IFN signaling in Usp18 Ity9 mice affected IL-10 production."
Interferon increases the amount of USP18.
| 8
Interferon increases the amount of USP18. 8 / 10
| 8

reach
"Previous studies have shown that the expression of USP18 could be rapidly induced by interferon, viral infection, and genotoxic stress XREF_BIBR."

reach
"To investigate whether endogenous IFN signaling induces USP18 expression during tumor development in vivo, we inoculated C57BL/6 mice with B16-GFP tumor cells."

reach
"However, USP18 expression is strongly stimulated by IFN treatment and exerts negative regulation of type I interferon signaling, which is independent of its enzymatic activity 21."

reach
"Like ISG15, the expression of its conjugating enzymes and USP18 is upregulated by IFN (Fig. 1a) ."

reach
"Forty of the 71 interferon-stimulated genes, including myxovirus resistance (Mx) 1, Mx2, 2’−5’-oligoadenylate synthase-like protein 1 (Oasl1), Rsad2, nicotinamide phosphoribosyltransferase (Nampt), interferon-stimulated gene (Isg) 15, Isg20, and ubiquitin specific peptidase 18 (Usp18), were expressed at higher levels in Mkp-1 mice than in Mkp-1 mice following E. coli infection."

reach
"ISG43 expression is induced by interferon and negatively regulated by RNase-L."

reach
"The expression of Mx2, Rsad2, Ifit3, Herc5 and Usp18, but not RnaseL and Ifitm3, was significantly induced by the IFN injection in the PBS control group."

reach
"Like ISG15, the expression of its conjugating enzymes and USP18 is upregulated by IFN (XREF_FIG a)."
Interferon binds USP18.
| 1 7
| 1 4

sparser
"Interestingly, a high level of USP18 expression has been associated with non-response to IFN treatment ( xref )."

reach
"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling, we investigated a potential interaction of Usp18 with the IFN-lambda specific receptor subunit IL-28R1."

sparser
"Baseline USP18 IFN -N levels are associated with both virological and serological response, and have the potential to become a clinical predictor for treatment outcomes in HBeAg-positive CHB patients before initiating IFN-α therapy."

sparser
"USP18 is an inhibitor of IFN signaling xref , xref that is up regulated in chronic HCV infection, and lower levels of USP18 are associated with suppression of viral replication in vitro and a beneficial response to IFN in patients xref , xref ."

sparser
"To exert its function as a negative regulator, USP18 binds to the IFN receptor/JAK complex and attenuates the magnitude of the response ( xref ; xref ; xref )."
| 2

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [107]."

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [ xref ]."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
Interferon inhibits USP18.
| 2
| 2

reach
"As shown in Fig. 4 B, anti-IFN alpha/beta antibodies significantly reduced expression of the interferon stimulated genes ISG15 and USP18."

reach
"The decrease was associated with the expression of IFN stimulated gene USP18 (UBP43), which is proposed to interact with the IFN-alpha receptor and inhibit signaling through JAK1."
USP18 affects MAP3K7
2 1 | 2 36 5
USP18 deubiquitinates MAP3K7.
1 | 19
USP18 deubiquitinates MAP3K7. 10 / 20
1 | 19

reach
"USP18 deubiquitinates TAK1 in a protease dependent manner in HEK293 cells."

reach
"In contrast, they suggest that USP18 inhibits ubiquitination of the TAK1 and TAB1 complex in a protease dependent manner XREF_BIBR, XREF_BIBR."

reach
"USP18 can inhibit the ubiquitination of the TAK1 and TAB complex, thereby inhibiting IL-2 production and promoting IL-17 production and synthesis."

reach
"USP18 directly cleaves the K63 linked polyubiquitin chains, but not K48 linked polyubiquitin chains from TAK1 in a protease dependent manner since the USP18 catalytically inactive mutant can not deubiquitinate TAK1."

reach
"Collectively, these data suggest that USP18 targets the TAB1 and TAK1 complex and inhibits TAK1 polyubiquitination modification and kinase activity, thereby restricting TCR mediated NF-kappaB and NFAT activation and subsequent expression of IL-2."

reach
"Collectively, our findings revealed that USP18 inhibits TAK1 and NEMO ubiquitination through different mechanisms."

reach
"Using similar mechanisms of action, deubiquitination of TAK1 by the deubiquitinase USP18 inhibits TCR (Figure 2)."
| PMC

reach
"USP18 de-ubiquitinates TAK1, thereby blocking phosphorylation of RCAN1, an inhibitor of calcineurin."

reach
"Interestingly, in transfection experiments, Usp18 bound to and deubiquitinated Tak1, thereby reducing its kinase activity and the associated downstream signaling."

reach
"Importantly, USP18 is associated with and deubiquitinates the TAK1 and TAB1 complex, thereby restricting expression of IL-2."
USP18 binds MAP3K7.
2 | 5 3
2 | 4 2

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."

sparser
"However, NEMO deficiency did not lead to loss of interaction between USP18 and TAK1 ( xref ), suggesting that USP18 targets TAK1 complex and IKK complex by distinct mechanisms."

sparser
"Although USP18 mutants can still bind to ubiquitinated TAK1, it fails to cleave the polyubiquitin chains, resulting in a stable USP18-ubiquitinated-TAK1 complex."

reach
"Interestingly, in transfection experiments, Usp18 bound to and deubiquitinated Tak1, thereby reducing its kinase activity and the associated downstream signaling."

reach
"We next examined whether USP18 interacted with TAK1."

No evidence text available

No evidence text available

reach
"However, NEMO deficiency did not lead to loss of interaction between USP18 and TAK1 (XREF_FIG), suggesting that USP18 targets TAK1 complex and IKK complex by distinct mechanisms."
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
Mutated USP18 binds ubiquitinated MAP3K7. 1 / 1
| 1

reach
"Although USP18 mutants can still bind to ubiquitinated TAK1, it fails to cleave the polyubiquitin chains, resulting in a stable USP18, ubiquitinated, and TAK1 complex."
USP18 inhibits MAP3K7.
| 2 1 2
USP18 inhibits MAP3K7. 5 / 8
| 2 1 2

eidos
"Accordingly , since TAK1 is required for JNK activation , leading to insulin resistance , and since USP18 inhibits TAK-1 , an insulin-sensitizing effect of USP18 has been shown in the liver [ 39 , 43 ] ."

sparser
"Accordingly, since TAK1 is required for JNK activation, leading to insulin resistance, and since USP18 inhibits TAK-1, an insulin-sensitizing effect of USP18 has been shown in the liver [ xref , xref ]."

reach
"Recent work has demonstrated that USP18 has the ability to deubiquitinate the transforming growth factor activated kinase 1 (TAK1) complexes required for NF-kappaB activation in T cells and that overexpression of USP18 leads to decreased nuclear activation and impaired formation of TAK1 complexes."

eidos
"USP18 was shown to inhibit the NFkappaB pathway and TAK1 ."

sparser
"The exacerbation of cardiac remodelling in mice with USP18 deficiency further confirmed the protective role of USP18 against cardiac dysfunction caused by pathological hypertrophy. xref A molecular study found that USP18 inactivates TAK1 by deubiquitinating K63‐linked polyubiquitination and it subsequently suppresses the downstream NF‐κB and JNK1/2 signalling pathways, which plays critical role in NAFLD progression. xref USP14 also contributes to suppress the development of cardiac hypertrophy by increasing phosphorylation of GSK‐3β (Table  xref ). xref Together, these findings indicate that the most of the DUBs protect the cardiac structure and function against pathological cardiac modelling caused by various stimulus."
USP18 activates MAP3K7.
| 6
USP18 activates MAP3K7. 6 / 6
| 6

reach
"However, NEMO deficiency did not lead to loss of interaction between USP18 and TAK1 (XREF_FIG), suggesting that USP18 targets TAK1 complex and IKK complex by distinct mechanisms."

reach
"Based on our experimental data, we propose a working model to explain how USP18 negatively regulates NF-kappaB signaling by targeting TAK1 and NEMO."

reach
"USP18 negatively regulates NF-kappaB signaling by targeting TAK1 and NEMO for deubiquitination through distinct mechanisms."

reach
"Recent work has demonstrated that USP18 has the ability to deubiquitinate the transforming growth factor-activated kinase 1 (TAK1) complexes required for NF-κB activation in T cells and that overexpression of USP18 leads to decreased nuclear activation and impaired formation of TAK1 complexes (47)."

reach
"After TLR ligand stimulation, TAK1 and NEMO undergo K63 linked ubiquitination by TRAF6, while upregulated USP18 targets TAK1 and NEMO."

reach
"Considering the phenotypes observed with Tak -/- and Usp18 -/- T cells or Usp18 -/- T cells transfected with USP18 (WT) or USP18 (C61S), we further hypothesized that USP18 targets TAK1 complex and catalyzes deubiquitination of TAK1."
USP18 ubiquitinates MAP3K7.
| 3
USP18 ubiquitinates MAP3K7. 3 / 3
| 3

reach
"Collectively, these data suggest that USP18 targets the TAB1 and TAK1 complex and inhibits TAK1 polyubiquitination modification and kinase activity, thereby restricting TCR mediated NF-kappaB and NFAT activation and subsequent expression of IL-2."

reach
"Another way that USP18 inhibited NF-κB activation is by deubiquitinating K63-Ub of TAK1 and NEMO [42]."

reach
"USP18 inhibits NF-kappaB and NFAT activation during Th17 differentiation by deubiquitinating the TAK1 and TAB1 complex."
USP18 dephosphorylates MAP3K7.
| 2
USP18 leads to the dephosphorylation of MAP3K7. 2 / 2
| 2

reach
"Hepatic ubiquitin specific protease 4 (USP4), USP18, and dual-specificity phosphatases 14 (DUSP14) can suppress TAK1 phosphorylation, besides tumor necrosis factor receptor associated factor 3 (TRAF3) and tripartite motif 8 (TRIM8) promote its phosphorylation."

reach
"Mechanistically, androgen-activated androgen receptor (AR) upregulated expression of USP18, which inhibited TAK1 phosphorylation and the subsequent activation of NF-κB in anti-tumor T cells."
| 2 42
| 2 29

reach
"Overall, these results suggested that USP18 promotes pancreatic cancer cell proliferation by facilitating cell cycle progression and inhibiting cell apoptosis."

reach
"Silencing of USP18 in hepatoma HepG2 cells was shown to cause accumulation of cells in G0/G1 and apoptosis 29."

reach
"Moreover, Overexpression of USP18 enhanced autophagy to inhibit cell apoptosis induced by SCII in vivo and in vitro."

reach
"Deubiquitinase Usp18 prevents cellular apoptosis from oxidative stress in liver cells."

reach
"In fact, double inhibition of USP18 and STAT1 or STAT2 reverted the supportive effect of USP18 knockdown in IFNalpha induced beta cell apoptosis."

reach
"Silencing USP18 in SiHa and Caski cervical cancer cell lines inhibited cell proliferation, induced apoptosis, and promoted cleaved caspase-3 expression."

reach
"Engineered reduction of USP18 expression repressed lung cancer growth and promoted apoptosis."

reach
"Thus, we show that inhibition of USP18 exacerbates pro inflammatory chemokine production via induction of the STAT signaling pathway and increases IFN induced beta cell apoptosis by activation of the mitochondrial driven pathway of cell death."

reach
"Another RNA interference screen of 53 DUBs revealed that loss of USP18 enhanced apoptosis triggered by bortezomib or etoposide [XREF_BIBR]."

reach
"Furthermore, cell apoptosis was promoted by USP18 silencing, and interference of USP18 suppressed cell migration and invasion."
| 13

reach
"Indeed, it has been shown that ablating USP18, the enzyme that deconjugates ISG15 from target proteins, increased TRAIL production and promoted the extrinsic apoptosis pathway in cells treated with IF[MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"

reach
"Inhibition of AKT attenuated the decrease in cell apoptosis induced by USP18 overexpression and increased cell viability and migration."

reach
"Consistently, the loss of c-Myc reversed the cell cycle arrest and apoptosis induced by USP18 overexpression in SW1990 cells (XREF_FIG - XREF_FIG)."

reach
"Therefore, all the above studies demonstrated that ISG15 and USP18 alone induced apoptosis in leukemia, myeloma and cervical cancer cells."

reach
"XREF_BIBR - XREF_BIBR Consistent with this, an siRNA to the ISG, USP18, that deconjugates ISG15 from target proteins, increased expression of TRAIL and thus promoted apoptosis."

reach
"Identification of USP18 as an important regulator of the susceptibility to IFN-alpha and drug induced apoptosis."

reach
"Also, depletion of Usp18 led to a decrease in protein levels of other known oncogenic targets of miR-7, reduced cell proliferation and soft agar colony formation, and increased apoptosis."

reach
"Downregulation of USP18 inhibits growth and induces apoptosis in hepatitis B virus related hepatocellular carcinoma cells by suppressing BCL2L1."

reach
"27 Silencing USP18 in glioblastoma cells produces similar results, 84 a finding suggesting that strengthening the IFN-I pathway by silencing USP18 elicits apoptosis in drug treated cells with robust caspase-8 and caspase-3 activation independent of the mitochondrial pathway."

reach
"Down-regulation of USP18 expression together with the induction of ER-stress efficiently restored apoptosis in U87MG cells."
USP18 affects IFNA
| 5 41 3
USP18 inhibits IFNA.
| 5 19 1
USP18 inhibits IFNA. 10 / 26
| 5 19 1

reach
"We speculate that by blocking IFN-alpha signaling, USP18 expression may lead to an enhanced susceptibility to infection with interferon sensitive viruses and enhanced viral proliferation."

reach
"Lack of USP18 was shown to abrogate this desensitizing effect of IFN-alpha in vivo [XREF_BIBR], whereas USP18 expression was sufficient to establish this state of refractoriness [XREF_BIBR]."

sparser
"The reason for this paradox is unknown, but IFN-λ4 has been speculated to render HCV-infected hepatocytes refractory to IFN-α, for example by inducing the expression of USP18, which inhibits IFN-α but not IFN-λ signaling41."

reach
"The reason for this paradox is unknown, but IFN-lambda4 has been speculated to render HCV infected hepatocytes refractory to IFN-alpha, for example by inducing the expression of USP18, which inhibits IFN-alpha but not IFN-lambda signaling XREF_BIBR."

eidos
"USP18 , downregulates the production of IFNalpha through interaction with IFNAR signaling [ 326 ] ."
| PMC

reach
"Further proviral ISG15 functions stem from human ISG15 interactions, which are crucial for USP18 mediated inhibition of IFN-alpha and beta signaling responses."

reach
"However, knockdown of USP18 reversed this effect and augmented the effect of IFN-α (Fig. 3B, columns 9, 10, 12, and 14)."

reach
"USP18 inhibition by two independent siRNAs increased beta cell apoptosis following exposure to IFNalpha or IFNgamma (XREF_FIG), whereas siCTRL has no such effect."

reach
"The reason for this paradox is unknown, but IFN-λ4 has been speculated to render HCV-infected hepatocytes refractory to IFN-α, for example by inducing the expression of USP18, which inhibits IFN-α but not IFN-λ signaling41."

reach
"In hepatoma cells, IFNL4 gene transfection or recombinant IFN-lambda4 protein treatment robustly increased the protein levels of ISG15 and USP18 in an IFNLR1 dependent manner and potently blocked IFN-alpha signalling."
USP18 activates IFNA.
| 21
USP18 activates IFNA. 10 / 21
| 21

reach
"In the current study, for the first time, we demonstrated that ISG15 and USP18 protein levels are increased in HCV infected PHHs and IFN-lambda4-expressing or -treated cells and that ISG15 and USP18 proteins mediate IFN-alpha unresponsiveness in IFN-lambda4-expressing or -treated cells."

reach
"Taken together, we concluded that USP18 potentiates the anti-HBV activity of IFN-alpha by targeting the JAK and STAT signaling pathway in Hepg2.2.15 cells."

reach
"Furthermore, previous studies reported that blocking of IFN-α signaling by USP18 does not depend on the enzymatic activity of USP1827."

reach
"Usp18 deficient cells have enhanced IFN-alpha and beta signaling and more ISG15 modified proteins."

reach
"Our results indicated that USP18 modulates the anti-HBV activity of IFN-alpha via activation of the JAK and STAT signaling pathway in Hepg2.2.15 cells."

reach
"For example, ischemic reperfusion injury upregulates USP18 expression in the liver and induces an IFN-α refractory state."

reach
"In the absence of ISG15, USP18 proteolysis is more rapid, driving the dysregulated IFN-alpha and beta response and resulting in both the blood IFN-alpha and beta signature and brain calcifications seen in the patients."

reach
"Furthermore, previous studies reported that blocking of IFN-alpha signaling by USP18 does not depend on the enzymatic activity of USP18 27."

reach
"Treatment of Huh7.5 cells and primary murine hepatocytes with LPS and TNF-α, but not IL-6 or IL-10, led to upregulated USP18 expression and induced an IFN-α refractory state, which was reversed by USP18 knockdown."

reach
"The IFN-alpha signal blocking activity of USP18 is mediated by the binding of USP18 to the intracellular domain of IFNAR2, which prevents the binding of JAK1 to IFNAR2 27."
USP18 binds IFNA.
| 1 2
| 1 2

sparser
"USP18 decreased IFNα binding to U6A cells only in the presence of full length STAT2 but not STAT2ΔCC/DB ( xref ), supporting the notion that interaction of STAT2 and USP18 is important for the type I IFN ligand-receptor binding."

reach
"The binding of USP18 with the IFN-α receptor has been shown to inhibit the interaction of STAT-1 with the IFN-α receptor and thus block downstream IFN signaling (12, 15)."

sparser
"The IFN-mediated activation of the Jak-STAT pathway is tightly regulated by various cellular factors such as SOCS family members, USP18, the protein phosphatase 2A (PP2A), and protein inhibitors of STAT (PIAS).[ xref ] Along those lines, SOCS1 and SOCS3 transcriptional expression in hepatocytes remains detectable for only a short period of time upon alfa treatment indicating that by inhibiting Janus kinases both proteins are likely responsible for early termination of STAT activation.[ xref ] In addition, the sustained up-regulation of USP18 was associated with a long-lasting refractory state to IFN-α stimulation in hepatocytes and other primary human cells.[ xref ] The specific interaction of USP18 with IFNAR2 selectively affects IFN—induced signaling while having a marginal effect on other classes of IFNs, including type III IFNs."
IRS4 affects USP18
| 20 25
IRS4 binds USP18.
| 18 25
| 18 23

reach
"And this IRS4 and USP18 interaction diminish USP18 's inhibitory effect on Jak and STAT signaling, therefore to potentiate the anti-HCV effect of IFN-a."

sparser
"To determine which region of USP18 binds to IRS4, the Flag-tagged deletion mutants of USP18 was used for binding studies (Figure xref )."

sparser
"In contrast, we showed that USP18 C-terminal region (amino acid residue 321-372) bound to IRS4 (Figure xref )."

sparser
"In addition, IRS4 (401–1257) bound to USP18 (Figure xref ), but not IRS4 region 401-1093 (Figure xref )."

sparser
"To examine whether over-expressed USP18 can interact with endogenous IRS4, Flag or Flag-tagged USP18 were over-expressed in 293T cells and immunoprecipitated with an anti-Flag M2 affinity assay."

reach
"Co-IP assay demonstrated that IRS4 (1-400) bound to USP18."

sparser
"We identified that amino acids 335–400 and amino acids 1094-1257 of IRS4 are important for the IRS4-USP18 interaction."

sparser
"These results collectively demonstrated that IRS4 interacted with USP18 endogenously."

sparser
"In this study, combination of IP and MS screening and in vitro functional studies identified that IRS4 interacts with USP18 endogenously."

reach
"And to detect whether IRS4 interacts with USP18 endogenously, immunoblot analysis of whole cell lysates and anti-IRS4 or lgG IP derived from Huh7.5.1 cells or 293T cells were performed."
USP18 binds IRS4 and Flag. 2 / 2
| 2

sparser
"Co-IP assay of the interaction of Flag-tagged deletion mutants of USP18 and endogenous IRS4 confirmed these observations (Figure xref )."

sparser
"Moreover, Co-IP assay of the interaction of Flag-tagged deletion mutants of IRS4 with endogenous USP18 confirmed these results (Figure xref )."
IRS4 activates USP18.
| 2
IRS4 activates USP18. 2 / 2
| 2

reach
"These results collectively demonstrated that IRS4 diminished the inhibitory effect of USP18 on Jak and STAT signaling pathway."

reach
"IRS4 diminished the inhibitory effects of USP18 on Jak and STAT signaling pathway."
1 3 | 10 22
| 8 9

eidos
"USP18 is induced in hepatocytes by LPS and TNF - but not by IL-6 and IL-10 ."

eidos
"Usp18 is strongly upregulated by type I and type III IFNs [ 33,35,37,51,52 ] , lipopolysaccharides [ 53,54 ] , polyI :C [ 53 ] , tumor necrosis factor alpha ( TNFalpha ) [ 54 ] , or genotoxic stresses [ 35,55 ] ."

reach
"For example, inflammatory stimuli, e.g., endotoxin and lipopolysaccharide (LPS), have been shown to upregulate USP18 in peritoneal exudate macrophages (18)."

eidos
"We next sought to determine whether TNF-alpha and LPS could induce USP18 expression in hepatocytes via the induction of IFN-alpha ."

reach
"For example, inflammatory stimuli, e.g., endotoxin and lipopolysaccharide (LPS), have been shown to upregulate USP18 in peritoneal exudate macrophages."

eidos
"FIG 1 : USP18 expression is upregulated by TNF-alpha and LPS ."

reach
"For example, inflammatory stimuli, e.g., endotoxin and lipopolysaccharide (LPS), have been shown to upregulate USP18 in peritoneal exudate macrophages (18)."

reach
"For example, LPS treatment of a murine macrophage cell line upregulates USP18 in an IRF3-dependent manner (18)."

eidos
"FIG 5 : IFN-alpha , LPS , and TNF-alpha do not induce type 1/2 IFN in primary murine hepatocytes but do induce USP18 ."

reach
"For example, LPS treatment of a murine macrophage cell line upregulates USP18 in an IRF3 dependent manner."
Lipopolysaccharide increases the amount of USP18.
1 3 | 10
Lipopolysaccharide increases the amount of USP18. 10 / 16
1 3 | 10

reach
"We next sought to determine whether TNF-alpha and LPS could induce USP18 expression in hepatocytes via the induction of IFN-alpha."

reach
"TNF-alpha and LPS treatment also led to augmented USP18 protein expression by Western blotting (XREF_FIG) and by intracellular staining (XREF_FIG to XREF_FIG)."

reach
"We observed that neither IFN-α, LPS, nor TNF-α induce much, if any, hepatocyte expression of IFN-α or IFN-γ, although the same doses induce strong expression of USP18 (Fig. 5)."

reach
"USP18 mRNA expression was induced by TNF-α and LPS but not by IL-6 or IL-10 (Fig. 1A)."

reach
"MacParland et al. showed that TNF-alpha or LPS could target USP18 expression and thus inhibit IFN signaling [XREF_BIBR]."

reach
"TABLE 1: Inhibition of inflammatory signaling impairs TNF-α- and LPS-induced USP18 expressionaFIG 1: USP18 expression is upregulated by TNF-α and LPS."

reach
"USP18 mRNA expression was induced by TNF-alpha and LPS but not by IL-6 or IL-10 (XREF_FIG)."

reach
"We next sought to determine whether TNF-α and LPS could induce USP18 expression in hepatocytes via the induction of IFN-α."

No evidence text available

"LPS strongly activates UBP43 expression in macrophages, which is paralleled by changes in UBP43 protein levels."
| 2 3

reach
"As seen in Fig. 6B, HIRI led to a significant increase in LCMV viral titers in USP18+/+ mice, an effect that was not observed in USP18−/− mice.Having shown that LPS/TNF-α stimulation increases hepatocyte USP18 expression, we then sought to determine whether we could pharmacologically inhibit the induction of USP18 by LPS and TNF-α."

reach
"Having shown that LPS and TNF-alpha stimulation increases hepatocyte USP18 expression, we then sought to determine whether we could pharmacologically inhibit the induction of USP18 by LPS and TNF-alpha."

eidos
"Having shown that LPS / TNF - stimulation increases hepatocyte USP18 expression , we then sought to determine whether we could pharmacologically inhibit the induction of USP18 by LPS and TNF - ."

eidos
"Having shown that LPS / TNF-alpha stimulation increases hepatocyte USP18 expression , we then sought to determine whether we could pharmacologically inhibit the induction of USP18 by LPS and TNF-alpha ."

reach
"Inhibition of inflammatory signaling impairs LPS and TNF-alpha stimulated USP18 induction."
USP18 affects IKBKG
2 1 | 20 8
USP18 binds IKBKG.
2 | 3 6
2 | 3 4

reach
"Next, we examined whether USP18 directly interacts with NEMO."

sparser
"Next, we examined whether USP18 directly interacts with NEMO."

sparser
"Co-immunoprecipitation experiments showed that USP18 only interacted with full length (FL) NEMO or its UBAN domain ( xref )."

No evidence text available

reach
"Little binding between USP18 and NEMO or between USP18 and IKKbeta was observed in unstimulated cells."

sparser
"To further confirm endogenous interaction between USP18 and NEMO, we stimulated THP-1 derived macrophages with LPS for various time points."

sparser
"Mutation analysis revealed direct binding of USP18 to the UBAN motif of NEMO."

reach
"To further confirm endogenous interaction between USP18 and NEMO, we stimulated THP-1 derived macrophages with LPS for various time points."

No evidence text available
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."

sparser
"Taken together, these results suggest that in addition to the TAK1-TAB1 complex, USP18 also interacts with the IKK complex upon LPS treatment in a NEMO-dependent manner."
USP18 deubiquitinates IKBKG.
1 | 10
USP18 deubiquitinates IKBKG. 10 / 11
1 | 10

reach
"To investigate the precise mechanisms mediating inhibition of NEMO ubiquitination by USP18, we generated NEMO deletion mutants (XREF_FIG), containing a domain responsible for IKK binding, TANK binding, UBAN, or IkappaBalpha binding."

reach
"On the other hand, USP18 inhibits NEMO ubiquitination by directly binding to its UBAN domain."

reach
"These results indicate that USP18 inhibits NEMO ubiquitination as well as NF-kappaB activity in a protease independent manner."

reach
"USP18 inhibits NEMO ubiquitination at the Lys -325 and 326 sites by masking the UBAN domain of NEMO."

reach
"Since the UBAN domain of NEMO contains all five K63 linked ubiquitination sites (Lys 285, Lys 321, Lys 325, Lys 326, and Lys 399) XREF_BIBR and two linear ubiquitination sites for NEMO (Lys 285 and Lys 309) XREF_BIBR, USP18 may prevent NEMO ubiquitination by masking these ubiquitination sites through direct binding."

reach
"Collectively, our findings revealed that USP18 inhibits TAK1 and NEMO ubiquitination through different mechanisms."

"USP18 negatively regulates NF-κB signaling by targeting TAK1 and NEMO for deubiquitination through distinct mechanisms"

reach
"Another way that USP18 inhibited NF-κB activation is by deubiquitinating K63-Ub of TAK1 and NEMO [42] ."

reach
"First, we used the two-step immunoprecipitation assay to assess whether USP18 prevents the conjugated ubiquitination of NEMO."

reach
"We next tested whether USP18 inhibited NEMO ubiquitination through USP18 protease activity."
USP18 inhibits IKBKG.
| 1
USP18 inhibits IKBKG. 1 / 7
| 1

reach
"USP18 also decreased K63-Ub of NEMO [42]."
USP18 ubiquitinates IKBKG.
| 4 2
USP18 ubiquitinates IKBKG. 6 / 6
| 4 2

reach
"To investigate the precise mechanisms mediating inhibition of NEMO ubiquitination by USP18, we generated NEMO deletion mutants (XREF_FIG), containing a domain responsible for IKK binding, TANK binding, UBAN, or IkappaBalpha binding."

sparser
"In addition, we observed that the inhibition of K63-linked ubiquitination of NEMO by USP18 is almost abrogated using NEMO K325R and K326R mutants, but not other NEMO mutants ( xref )."

sparser
"To investigate the precise mechanisms mediating inhibition of NEMO ubiquitination by USP18, we generated NEMO deletion mutants ( xref ), containing a domain responsible for IKK binding, TANK binding, UBAN, or IκBα binding."

reach
"We also found that USP18 blocked IKK phosphorylation by inhibiting the ubiquitination of NEMO."

reach
"In addition, we observed that the inhibition of K63 linked ubiquitination of NEMO by USP18 is almost abrogated using NEMO K325R and K326R mutants, but not other NEMO mutants (XREF_SUPPLEMENTARY)."

reach
"Another way that USP18 inhibited NF-κB activation is by deubiquitinating K63-Ub of TAK1 and NEMO [42]."
USP18 activates IKBKG.
| 2
USP18 activates IKBKG. 2 / 2
| 2

reach
"Based on our experimental data, we propose a working model to explain how USP18 negatively regulates NF-kappaB signaling by targeting TAK1 and NEMO."

reach
"USP18 negatively regulates NF-kappaB signaling by targeting TAK1 and NEMO for deubiquitination through distinct mechanisms."
SKP2 affects USP18
4 1 | 1 21 10
SKP2 binds USP18.
4 | 13 8
4 | 13 6

sparser
"Along with others, we reported that SKP2 interacts with USP18 and promotes its degradative ubiquitination xref , xref ."

reach
"In a first set of experiments, we analyzed the impact of ISG15 on the USP18 and SKP2 complex."

reach
"We found that USP18 and SKP2 interact and that free ISG15 abrogates the complex, liberating USP18 from degradation and concomitantly driving SKP2 to degradation and/or ISGylation."

reach
"Overall, these results indicate that free ISG15 interferes with the USP18 and SKP2 complex regarless of the catalytic activity of USP18 or its ISG15 binding potential."

No evidence text available

reach
"Along with others, we reported that SKP2 interacts with USP18 and promotes its degradative ubiquitination XREF_BIBR, XREF_BIBR."

sparser
"By co-immunoprecipitation we confirmed the binding of exogenous SKP2 (55 kDa) to USP18 (Fig.  xref , lane 1)."

reach
"Overall, our results indicate that free ISG15, regardless of its conjugation potential, interferes with the USP18 and SKP2 complex through a mechanism that does not require direct binding to USP18 or ISGylation/de ISGylation events."

reach
"The formation of the USP18 and SKP2 complex (XREF_FIG, lane 8), was prevented by co-expression of ISG15 (lane 10 versus lane 8) and ISG15 co-immunoprecipitated with USP18 independently of SKP2 expression (lanes 9 and 10)."

sparser
"It has been reported that ISG15 has a role in regulating the cell cycle through its interactions with SKP2 and USP18, although experiments in that study were not performed in IFN-treated cells, nor were ISG15 knockout cells tested ( xref )."
| 2

sparser
"USP18 formed a complex with the E3 ubiquitin ligase recognition factor SKP2 (S-phase kinase associated protein 2) and SAMHD1."

sparser
"Numerous studies have reported that SAMHD1 can interact with cyclin/CDK complexes ( xref ), USP18 ( xref ) and S-phase kinase-associated protein 2 ( xref ), which are involved in the regulation of cell proliferation ( xref , xref )."
SKP2 inhibits USP18.
| 1 5
SKP2 inhibits USP18. 6 / 6
| 1 5

eidos
"In humans , binding of free ISG15 prevents proteasomal degradation of USP18 by SKP2 ( Tokarz et al ., 2004 ) and is critical to ensure negative regulation of IFN-alpha / beta immunity by stabilizing USP18 ( Zhang et al ., 2015 ) ."

reach
"ISG15 was shown to bind to and prevent USP18 degradation mediated by S-phase kinase-associated protein 2 (SKP2)-dependent ubiquitylation ."

reach
"We therefore analysed the impact of ISG15 on SKP2 mediated USP18 degradation."

reach
"This binding prevents the SKP2 mediated degradation of USP18, and thus is critical for the accumulation of USP18 and the appropriate regulation of IFN-alpha and beta signalling."

reach
"ISG15 was shown to bind to and prevent uSP18 degradation mediated by S-phase kinase-associated protein 2 (SKP2)-dependent ubiquitylation 4,114 ."

reach
"In humans, binding of free ISG15 prevents proteasomal degradation of USP18 by SKP2 (Tokarz et al., 2004) and is critical to ensure negative regulation of IFN-α/β immunity by stabilizing USP18 (Zhang et al., 2015)."
SKP2 activates USP18.
| 3
SKP2 activates USP18. 3 / 4
| 3

reach
"Patient fibroblasts, transduced with control luciferase (Luc) or with USP18, were treated with IFNalpha and SKP2 was immunoprecipitated."

reach
"SKP2 (S-phase kinase associated protein 2) was found to target USP18 to ubiquitination and proteosomal degradation 10."

reach
"As summarized above, SKP2 can target USP18 for degradation, while ISG15 has an opposite action, being required for accumulation of USP18 as seen in IFN stimulated cells."
SKP2 ubiquitinates USP18.
1 | 2
SKP2 ubiquitinates USP18. 3 / 3
1 | 2

sparser
"We also show that Skp2 promotes UBP43 ubiquitination and degradation, resulting in higher levels of ISG15 conjugates."

sparser
"Mechanistically, the association of USP18 with free intracellular ISG15 prevents SCF SKP2 -mediated USP18 ubiquitination and subsequently its proteasomal degradation, thereby leading to the prevention of autoinflammation and over-amplification of IFN, which suggests that the long-term stabilization of USP18 by free intracellular ISG15 is essential for the negative feedback regulation of IFN signaling [ xref ]."
TNF affects USP18
| 9 17 2
TNF increases the amount of USP18.
| 13 2
TNF increases the amount of USP18. 10 / 17
| 13 2

reach
"USP18 mRNA expression was induced by TNF-alpha and LPS but not by IL-6 or IL-10 (XREF_FIG)."

reach
"We suspect that whereas increased TNF-alpha does contribute to USP18 expression, there are other stimuli, for example, LPS and perhaps the recently described interferon-lambda 4, that also modulate hepatic USP18 expression."

reach
"TNF-α and LPS treatment also led to augmented USP18 protein expression by Western blotting (Fig. 1C) and by intracellular staining (Fig. 1D to F)."

reach
"MacParland et al. showed that TNF-alpha or LPS could target USP18 expression and thus inhibit IFN signaling [XREF_BIBR]."

reach
"TNF-alpha and LPS treatment also led to augmented USP18 protein expression by Western blotting (XREF_FIG) and by intracellular staining (XREF_FIG to XREF_FIG)."

reach
"USP18 mRNA expression was induced by TNF-α and LPS but not by IL-6 or IL-10 (Fig. 1A)."

reach
"We suspect that whereas increased TNF-α does contribute to USP18 expression, there are other stimuli, for example, LPS and perhaps the recently described interferon-lambda 4 (56), that also modulate hepatic USP18 expression."

reach
"Having shown that LPS and TNF-alpha stimulation increases hepatocyte USP18 expression, we then sought to determine whether we could pharmacologically inhibit the induction of USP18 by LPS and TNF-alpha."

sparser
"As seen in Fig. 7A and as described in Table 1, TNF-α induced expression of USP18 was potently downregulated by all inhibitors tested, and this inhibition coincided with impaired IL-1β mRNA expression (Fig. 7B)."

sparser
"Treatment of Huh7.5 cells with TNF-α or LPS induced expression of USP18 in 74.1% ± 8.9% and 70.5% ± 5.2%, respectively, compared to untreated controls in which USP18 expression was 31.0% ± 4.7% (Fig. 1Fi)."
TNF activates USP18.
| 9 4
TNF activates USP18. 10 / 14
| 9 4

eidos
"These data suggest that the induction of USP18 by TNF - and LPS , and pos-sibly other inflammatory stimuli , is promoted by NF - > signaling and that hepatocyte USP18 expression in particular-compared to IL-1 - may be an attractive target for pharmacologic manipulation in the setting of liver inflammation ."

reach
"These data suggest that the induction of USP18 by TNF-alpha and LPS, and possibly other inflammatory stimuli, is promoted by NF-kappaBeta signaling and that hepatocyte USP18 expression in particular -- compared to IL-1beta -- may be an attractive target for pharmacologic manipulation in the setting of liver inflammation."

eidos
"These data suggest that the induction of USP18 by TNF-alpha and LPS , and possibly other inflammatory stimuli , is promoted by NF-kappaBeta signaling and that hepatocyte USP18 expression in particular - - compared to IL-1beta - - may be an attractive target for pharmacologic manipulation in the setting of liver inflammation ."

reach
"USP18 is induced in hepatocytes by LPS and TNF-alpha but not by IL-6 and IL-10."

eidos
"As seen in Fig. 7A and as described in Table 1 , TNF-alpha induced expression of USP18 was potently downregulated by all inhibitors tested , and this inhibition coincided with impaired IL-1beta mRNA expression ( Fig. 7B ) ."

reach
"These data suggest that the induction of USP18 by TNF-α and LPS, and possibly other inflammatory stimuli, is promoted by NF-κΒ signaling and that hepatocyte USP18 expression in particular—compared to IL-1β—may be an attractive target for pharmacologic manipulation in the setting of liver inflammation.In this study we examined the role of various inflammatory stimuli in the induction of USP18 and the downstream establishment of an IFN-α refractory state."

eidos
"FIG 1 : USP18 expression is upregulated by TNF-alpha and LPS ."

eidos
"We suspect that whereas increased TNF - does contribute to USP18 expression , there are other stimuli , for example , LPS and perhaps the recently described interferon-lambda 4 ( 56 ) , that also modulate hepatic USP18 expression ."

eidos
"USP18 expression is upregulated by TNF - and LPS ."

eidos
"FIG 5 : IFN-alpha , LPS , and TNF-alpha do not induce type 1/2 IFN in primary murine hepatocytes but do induce USP18 ."
USP18 affects NFkappaB
| 3 22
USP18 inhibits NFkappaB.
| 3 18
| 3 18

reach
"The LPS mediated TLR4 activation in human macrophages upregulates USP18, which in turn inhibits NF-kappaB activation, and thus the secretion of proinflammatory cytokines (TNF-alpha, IL-6, and IL-1beta) via interacting with TAK1-TAB1 and IKKalpha and beta-NEMO complexes [193]."
| DOI

eidos
"Another way that USP18 inhibited NF-kappaB activation is by deubiquitinating K63-Ub of TAK1 and NEMO [ 42 ] ."

reach
"USP18 deficiency or knockdown of USP20 resulted in enhanced K48 linked ubiquitination and accelerated degradation of STING, and impaired activation of IRF3 and NF-kappaB as well as induction of downstream genes after infection with DNA virus HSV-1 or transfection of various DNA ligands."

reach
"USP18 inhibits NF-kappaB signaling at the level of the IKK complex."

reach
"More importantly, USP18 only inhibited NF-kappaB activation in WT NEMO or NEMO (K285/309R) construct, but had no effect on NEMO (K325/326R) construct (XREF_FIG)."

reach
"USP18 mediated NF-kappaB inhibition may be of importance not only for T cell adaptive immunity but also for liver inflammation."

eidos
"The LPS-mediated TLR4 activation in human macrophages upregulates USP18 , which in turn inhibits NF-kappaB activation , and thus the secretion of proinflammatory cytokines ( TNF-alpha , IL-6 , and IL-1beta ) via interacting with TAK1-TAB1 and IKKalpha / beta-NEMO complexes ( Table 2 ) [ 193 ] ."
| DOI

reach
"These results suggest that USP18 inhibits NF-kappaB signaling upstream of p65, at the level of the IKK complex."

reach
"Consistent with these results, we found that knockdown of USP18 enhanced NF-kappaB-luc activity induced by TNF-alpha, LPS, MyD88, TRAF6, TAK1-TAB1, IKKbeta, but not p65 (XREF_FIG)."

eidos
"The LPS-mediated TLR4 activation in human macrophages upregulates USP18 , which in turn inhibits NF-kappaB activation , and thus the secretion of pro-inflammatory cytokines ( TNF-alpha , IL-6 , and IL-1beta ) via interacting with TAK1-TAB1 and IKKalpha / beta-NEMO complexes ( Table 2 ) [ 193 ] ."
| PMC
USP18 activates NFkappaB.
| 3
| 3

reach
"Knockdown of USP18 enhances NF-kappaB activation as well as the inflammatory response."

reach
"These results suggested that the suppression of NF-kappaB signaling by USP18 is mainly dependent on the inhibition of K63 linked polyubiquitination of NEMO on lysine residues at positions 325 and 326."

reach
"Therefore it is tempting to suggest that early induction of NF-kappaB (24hpi) mediated by USP18 during PRRSV infection, via increasing and decreasing nuclear translocation of p65 and p50, respectively, is detrimental for viral growth."
USP18 deubiquitinates NFkappaB.
| 1
USP18 leads to the deubiquitination of NFkappaB. 1 / 1
| 1

reach
"These results indicate that USP18 inhibits NEMO ubiquitination as well as NF-kappaB activity in a protease independent manner."
USP18 affects SKP2
4 | 16 8
USP18 binds SKP2.
4 | 13 8
4 | 13 6

sparser
"Along with others, we reported that SKP2 interacts with USP18 and promotes its degradative ubiquitination xref , xref ."

reach
"In a first set of experiments, we analyzed the impact of ISG15 on the USP18 and SKP2 complex."

reach
"We found that USP18 and SKP2 interact and that free ISG15 abrogates the complex, liberating USP18 from degradation and concomitantly driving SKP2 to degradation and/or ISGylation."

reach
"Overall, these results indicate that free ISG15 interferes with the USP18 and SKP2 complex regarless of the catalytic activity of USP18 or its ISG15 binding potential."

No evidence text available

reach
"Along with others, we reported that SKP2 interacts with USP18 and promotes its degradative ubiquitination XREF_BIBR, XREF_BIBR."

sparser
"By co-immunoprecipitation we confirmed the binding of exogenous SKP2 (55 kDa) to USP18 (Fig.  xref , lane 1)."

reach
"Overall, our results indicate that free ISG15, regardless of its conjugation potential, interferes with the USP18 and SKP2 complex through a mechanism that does not require direct binding to USP18 or ISGylation/de ISGylation events."

reach
"The formation of the USP18 and SKP2 complex (XREF_FIG, lane 8), was prevented by co-expression of ISG15 (lane 10 versus lane 8) and ISG15 co-immunoprecipitated with USP18 independently of SKP2 expression (lanes 9 and 10)."

sparser
"It has been reported that ISG15 has a role in regulating the cell cycle through its interactions with SKP2 and USP18, although experiments in that study were not performed in IFN-treated cells, nor were ISG15 knockout cells tested ( xref )."
| 2

sparser
"USP18 formed a complex with the E3 ubiquitin ligase recognition factor SKP2 (S-phase kinase associated protein 2) and SAMHD1."

sparser
"Numerous studies have reported that SAMHD1 can interact with cyclin/CDK complexes ( xref ), USP18 ( xref ) and S-phase kinase-associated protein 2 ( xref ), which are involved in the regulation of cell proliferation ( xref , xref )."
USP18 activates SKP2.
| 3
USP18 activates SKP2. 3 / 3
| 3

reach
"For instance, Tan et al. found that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway [XREF_BIBR]."

reach
"USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway."

reach
"Tan et al. have demonstrated that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway."
IFNA affects USP18
2 | 3 19 4
IFNA increases the amount of USP18.
2 | 8 1
IFNA increases the amount of USP18. 10 / 11
2 | 8 1

reach
"Untreated INS-1E cells showed low USP18 mRNA expression, but IFNalpha upregulated USP18 expression from 2 to 24h (XREF_FIG)."

reach
"IFN-alpha, LPS, and TNF-alpha do not induce type 1 and 2 IFNs in primary murine hepatocytes but do induce USP18 expression."

sparser
"Although IL-17A treatment alone didn’t significantly change the expression of USP18, IL-17A pretreatment could further enhance IFN-α-induced expression of USP18."

reach
"XREF_BIBR, XREF_BIBR We presently show that IFNalpha and dsRNA induce USP18 expression in human islets, primary rat beta cells and INS-1E cells, supporting its role in IFN related signaling pathways and antiviral responses in pancreatic beta cells."

"Table: IFNA treatment"

reach
"We observed that neither IFN-α, LPS, nor TNF-α induce much, if any, hepatocyte expression of IFN-α or IFN-γ, although the same doses induce strong expression of USP18 (Fig. 5)."

reach
"In contrast to IFN-l treatment, IFN-a treatment of this clone failed to induce the expression of the IFN-stimulated genes, Oasl2 ( Fig. 2A) and Usp18 (Fig. 2B) , and to protect against infection with TM967, a TMEV derivative expressing mCherry (Fig. 2C) ."

reach
"Thus, the induction of ISGs by LPS and TNF-α is very unlikely to reflect the induction of hepatocyte type 1 or type 2 IFN, which suggests that the observed USP18 induction is not due to type 1 or type 2 IFN secretion and autocrine stimulation of the IFN-α receptor.We then assessed whether tissue-wide hepatic inflammatory stress increases liver USP18 expression, as an in vivo confirmation of our in vitro findings."

reach
"We indeed demonstrated that both concentrations of IFN-alpha (500 and 5000 pg/mL) significantly increased mRNA gene expression of STAT1 (fold change [fc] = 2.7 and 3.1, respectively), ISG15 (fc = 2.1 and 3.3), and USP18 (fc = 2.1 and 3.4) (XREF_FIG)."

reach
"In contrast to IFN-λ treatment, IFN-α treatment of this clone failed to induce the expression of the IFN-stimulated genes, Oasl2 (Fig. 2A) and Usp18 (Fig. 2B), and to protect against infection with TM967, a TMEV derivative expressing mCherry (Fig. 2C)."
IFNA activates USP18.
| 3 7 1
IFNA activates USP18. 10 / 11
| 3 7 1

sparser
"The defect in the UBP43-mediated negative feedback control of IFN signaling that we have uncovered is in the IFN-α-induced expression of UBP43, either in the transcriptional activation of the UBP43 gene by IFN-α, or in a co- or post-transcriptional event that results in a specific reduction in UBP43 mRNA production."

eidos
"FIG 5 : IFN-alpha , LPS , and TNF-alpha do not induce type 1/2 IFN in primary murine hepatocytes but do induce USP18 ."

reach
"Furthermore, knockdown of USP18 increases both ISG induction and anti-HCV activity of IFN-alpha, and data have shown that IFN-alpha treatment given to mice in vivo increases hepatic USP18 and blunts the effect of a subsequent dose of IFN-alpha."

eidos
"Supporting this idea , we could verify that USP18 was expressed in both Tregs and Tconvs and was strongly induced by IFNalpha in a time - and dose-dependent fashion , as measured by intracellular staining of the USP18 protein ( not shown ) ."

reach
"IFNalpha induced beta cell apoptosis in USP18 silenced cells is mediated via three members of the BH3-only protein family."

reach
"Interestingly, unlike the results shown in XREF_FIG for ISG15, ISG56 and ISG12, we observed little or no IFN-alpha induction of the ISG43 mRNA by northern blotting in A. 2 Akata cells (which exhibited high and prolonged ISG expression), whereas induction of ISG43 expression was easily detectable in A. 15 cells (data not shown)."

eidos
"Supporting this idea , we could verify that USP18 was expressed in both Tregs and Tconvs and was strongly induced by IFNa in a time-and dose-dependent fashion , as measured by intracellular staining of the USP18 protein ( not shown ) ."

reach
"In our microarray analysis of IFN treated PHH, USP18 was induced preferentially by IFN-alpha."

reach
"Indeed, USP18 was induced almost exclusively by IFN-alpha."

reach
"Furthermore, knockdown of USP18 increases both ISG induction and anti-HCV activity of IFN-α (14), and data have shown that IFN-α treatment given to mice in vivo increases hepatic USP18 and blunts the effect of a subsequent dose of IFN-α (12)."
IFNA inhibits USP18.
| 3
IFNA inhibits USP18. 3 / 3
| 3

reach
"The IFN-α signal-blocking activity of USP18 is mediated by the binding of USP18 to the intracellular domain of IFNAR2, which prevents the binding of JAK1 to IFNAR2 27 ."

reach
"The IFN-α signal-blocking activity of USP18 is mediated by the binding of USP18 to the intracellular domain of IFNAR2, which prevents the binding of JAK1 to IFNAR227.Our group recently found that prolonged stimulation of IFN-λ3 induces the robust and sustained upregulation of ISG15 that stabilizes the USP18 protein and causes the unresponsiveness to exogenous IFN-α treatment10."

reach
"The IFN-alpha signal blocking activity of USP18 is mediated by the binding of USP18 to the intracellular domain of IFNAR2, which prevents the binding of JAK1 to IFNAR2 27."
IFNA binds USP18.
| 1 2
| 1 2

sparser
"USP18 decreased IFNα binding to U6A cells only in the presence of full length STAT2 but not STAT2ΔCC/DB ( xref ), supporting the notion that interaction of STAT2 and USP18 is important for the type I IFN ligand-receptor binding."

reach
"The binding of USP18 with the IFN-α receptor has been shown to inhibit the interaction of STAT-1 with the IFN-α receptor and thus block downstream IFN signaling (12, 15)."

sparser
"The IFN-mediated activation of the Jak-STAT pathway is tightly regulated by various cellular factors such as SOCS family members, USP18, the protein phosphatase 2A (PP2A), and protein inhibitors of STAT (PIAS).[ xref ] Along those lines, SOCS1 and SOCS3 transcriptional expression in hepatocytes remains detectable for only a short period of time upon alfa treatment indicating that by inhibiting Janus kinases both proteins are likely responsible for early termination of STAT activation.[ xref ] In addition, the sustained up-regulation of USP18 was associated with a long-lasting refractory state to IFN-α stimulation in hepatocytes and other primary human cells.[ xref ] The specific interaction of USP18 with IFNAR2 selectively affects IFN—induced signaling while having a marginal effect on other classes of IFNs, including type III IFNs."

reach
"For example, ISG15/USP18 promotes the proliferation and inhibits the apoptosis of HBV-associated HCC cells [72]."

reach
"This study showed that USP18 can promote the proliferation of colorectal cancer cells and might be a potential biomarker for the diagnosis of CRC."

reach
"Simultaneously, CCK8 and EdU assays showed that the reduced proliferation induced by USP18 knockdown in BxPC-3 cells was partly abolished by the introduction of c-Myc (XREF_FIG - XREF_FIG)."

reach
"However, USP18 silencing blocked the proliferation and migration induced by FTO."

reach
"In conclusion, USP18 promoted the proliferation and migration of ovarian cancer cells by activating AKT/mTOR signaling."

reach
"Silencing USP18 in SiHa and Caski cervical cancer cell lines inhibited cell proliferation, induced apoptosis, and promoted cleaved caspase-3 expression."

reach
"Overall, these results suggested that USP18 promotes pancreatic cancer cell proliferation by facilitating cell cycle progression and inhibiting cell apoptosis."

reach
"USP18 and FTO promote BLCA cell proliferation and migration."

reach
"A study has indicated that USP18 contributes to controlling carcinogenesis, as loss of USP18 function increases apoptosis and decreases cell proliferation by destabilization of the cyclin D1 protein 22.It remains, however, unclear so far whether the EFP, HERC5 and USP18 genes contribute to tumourigenesis through ISG15/ISGylation or other mechanisms."

reach
"The results showed that knockdown of USP18 reduced cell viability and ovarian cancer proliferation."

sparser
"Further studies demonstrated that ectopic ISG15 and USP18 inhibited proliferation of myeloma, leukemia and cervical cancer cells."

reach
"Further studies demonstrated that ectopic ISG15 and USP18 inhibited proliferation of myeloma, leukemia and cervical cancer cells."

reach
"Ectopic overexpression and knockdown assays indicated that USP18 can negatively regulate the proliferation of PTC cell lines."

reach
"As shown in Figure XREF_FIG, ISG15 and USP18 individually suppressed HeLa cell proliferation."
USP18 affects STAT1
| 22 3
USP18 dephosphorylates STAT1.
| 12
USP18 leads to the dephosphorylation of STAT1. 6 / 6
| 6

reach
"Unphosphorylated STAT1 and STAT2 are also upregulated by USP18 knockdown, suggesting their possible implication in IFNalpha induced chemokine expression."

reach
"USP18 acts to prevent JAK1 from binding to IFN-I receptor and hence arrests phosphorylation of STAT1 and STAT2, essential components of the transcription factor complex that induces ISGs."

reach
"USP18 silencing restored phosphorylation of STAT1 after IFN-alpha treatment, and forced expression of WT USP18 or enzymatically inactive C64S USP18 mutant blocked phosphorylation of STAT1."

reach
"USP18 silencing restored phosphorylation of STAT1 after IFN-α treatment, and forced expression of WT USP18 or enzymatically inactive C64S USP18 mutant blocked phosphorylation of STAT1 (Supplementary Fig. 8B)."

reach
"Silencing of USP18 by siRNA was later shown to prolong STAT1 phosphorylation and enhance ISG expression, resulting in a synergistic antiviral effect on HCV treated with IFN [XREF_BIBR]."

reach
"In line with this result, expression of aa 36-372, but not aa 51-372, of USP18 inhibited STAT1 phosphorylation upon IFNalpha treatment (XREF_SUPPLEMENTARY)."
Modified USP18 leads to the dephosphorylation of STAT1. 5 / 5
| 5

reach
"USP18 expression reduced STAT1 phosphorylation in STAT2 expressing U6A cells (XREF_FIG)."

reach
"In 2fTGH and U2A cells, USP18 expression clearly reduced STAT1 phosphorylation upon IFNalpha treatment (XREF_FIG), indicating that USP18 inhibits IFN signaling upstream of IRF9, as reported previously 21."

reach
"Since the STAT2-USP18 interaction is not affected by this mutation (XREF_SUPPLEMENTARY), USP18 expression still reduced phosphorylation of STAT1 in STAT2 Y690F expressing U6A cells stimulated with IFNalpha (XREF_FIG)."

reach
"USP18 silencing restored phosphorylation of STAT1 after IFN-α treatment, and forced expression of WT USP18 or enzymatically inactive C64S USP18 mutant blocked phosphorylation of STAT1 (Supplementary Fig. 8B)."

reach
"Silencing the expression of ISG15 or USP18 expression restored STAT1 phosphorylation and ISGs expression upon exogenous IFN-alpha treatment."
Phosphorylated USP18 leads to the dephosphorylation of STAT1. 1 / 1
| 1

reach
"Specifically, IFN-alpha induced the phosphorylation of STAT1 and USP18 silencing enhanced the STAT1 activation and phosphorylation for a longer periods of time compared to the control group (XREF_FIG), leading to increased expression of ISGs, and thus enhanced the antiviral activity against HBV in Hepg2.2.15 cells."
USP18 inhibits STAT1.
| 9
USP18 inhibits STAT1. 9 / 11
| 9

reach
"USP18 negatively regulates the activation of STAT1 upon interaction with IFNAR2 ."

reach
"USP18 negatively regulates the activation of STAT1 upon interaction with IFNAR2 (Malakhova et al., 2006)."

reach
"XREF_BIBR, XREF_BIBR To asses whether STAT1 or STAT2, which are both upregulated by USP18 inhibition (XREF_FIG), are implicated in the upregulation of Bim, DP5 and PUMA mRNA expression in USP18 silenced cells, we inhibited in parallel USP18 and STAT1 or STAT2 in INS-1E cells by use of specific siRNAs."

reach
"We further found that microglial Usp18 negatively regulates the activation of Stat1 and concomitant induction of interferon induced genes, thereby terminating IFN signaling."

reach
"Interestingly, IL-17A pretreatment increased the expression of suppressor of cytokine signaling (SOCS) 1, SOCS3 and USP18, which were also the ISGs negatively regulating activity of ISGF3."

reach
"Therefore, knockdown USP18 leads to prolonged and enhanced the activity of STAT1, and upregulated expression of many ISGs."

reach
"Silencing of USP18 by specific siRNA attenuated the pSTAT1 suppression by Ach."

reach
"Silencing USP18 prolongs the phosphorylated state of signal transducer and activator of transcription 1 (STAT1) and enhances the expression of ISGs in response to IFN-alpha [XREF_BIBR]."

reach
"Of note, USP18 knockdown did not increase pSTAT1 in response to IFN-alpha before 24 h; these findings are consistent with previous observations."
USP18 phosphorylates STAT1.
| 1 3
USP18 leads to the phosphorylation of STAT1. 4 / 4
| 1 3

reach
"We have previously shown that Usp18 Ity9 mice on a mixed background have increased levels of Ifnb transcript and increased STAT1 phosphorylation downstream of the receptor."

sparser
"The second mechanism is the recently described inhibition of STAT1 phosphorylation by UBP43 (the product of ISG43 ) through its inhibition of JAK1 interaction with the IFNAR2 subunit of the type I IFN receptor xref ."

sparser
"The scheme of HCV- and ethanol-induced regulation of IFNα-induced STAT1 phosphorylation by USP18 is presented as xref ."

sparser
"We conclude that acetaldehyde disrupts IFNα-induced STAT1 phosphorylation by the upregulation USP18 to block the innate immunity protection in HCV-infected liver cells, thereby contributing to HCV-alcohol pathogenesis."
USP18 affects STAT
| 18
USP18 inhibits STAT.
| 10
USP18 inhibits STAT. 10 / 13
| 10

reach
"Moreover, USP18 competitively inhibits IFN-alpha and beta-induced JAK and STAT activation [XREF_BIBR] and upregulates epidermal growth factor receptor (EGFR) expression [XREF_BIBR]."

reach
"Suppression of USP18 activated the JAK and STAT signaling pathway as shown by the increased and prolonged expression of phosphorylated signal transducer and activator of transcription 1 (p-STAT1) in combination with enhanced expression of several interferon stimulated genes (ISGs)."

reach
"As expected, exogenous USP18 expression significantly inhibited IFN-a-induced Jak and STAT signaling as shown by decreased p-STAT1 levels and ISRE activity."

reach
"Protein lysates were collected on day 4 postinfection and Gagp24 and USP18 expression were assessed by Western blotFigure 4: siRNA knockdown of USP18 enhances STAT activation and expression of ISGs in IFN‐β‐treated MDMs."

reach
"It has been reported that C-terminal region of USP18 (amino acid residue 312-368) competes with Jak1 for interacting with the type I IFN receptor (IFNAR2) and represses downstream Jak and STAT signaling pathway [XREF_BIBR]."

reach
"After 24 h, genomic DNA was collected and a qPCR assay developed to measure integrated proviral genomes showed that there were on average 3800 genomes per 10,000 cells in USP18 +/+ iMacs and on average 4900F I G U R E 4 siRNA knockdown of USP18 enhances STAT activation and expression of ISGs in IFN--treated MDMs.MDMs from 6 donors were transfected with nontargeting (NT) control or USP18 siRNA for 3 h followed by IFN-treatment for 18 h. (A) Expression of p-STAT1, p-STAT2, and USP18 was measured by Western blot."

reach
"Under physiological conditions, USP18 inhibits STAT signaling, decreasing IFNalpha induced chemokine production and activation of several members of the BH3-only protein family."

reach
"We next examined the effect of USP18 inhibition on the kinetics of IFNalpha induced STAT signaling activation."

reach
"Our findings indicate that USP18 inhibition induces inflammation by increasing the STAT signaling and exacerbates IFN induced beta cell apoptosis by the mitochondrial pathway of cell death."

reach
"Taken together, we concluded that USP18 potentiates the anti-HBV activity of IFN-alpha by targeting the JAK and STAT signaling pathway in Hepg2.2.15 cells."
USP18 activates STAT.
| 4
USP18 activates STAT. 4 / 7
| 4

reach
"Ye et al. (2021) demonstrated that DENV-2 infection increased USP18 expression; USP18 overexpression enhanced DENV-2 replication, while USP18 silencing inhibited DENV-2 replication by activating the IFN-α-mediated JAK/STAT signaling pathway."

reach
"USP18, a protein of 368 aa in length and an ISG15 isopeptidase, is a negative regulator of type I and III IFN-activated JAK/STAT signaling [142], and is rapidly upregulated by viral infection and IFNs."

reach
"By inhibiting the JAK/STAT pathway and suppressing the downstream effects of type I IFN signaling USP18 effectively reduces auto-inflammatory pathogenesis."

reach
"In contrast, silencing USP18 activates the Jak and STAT signaling and potentiates IFN anti-HCV ativity [XREF_BIBR]."
USP18 phosphorylates STAT.
| 2
USP18 leads to the phosphorylation of STAT. 2 / 2
| 2

reach
"By providing exogenous IFN-, we were able to demonstrate that lack of USP18 makes cells more sensitive to the effects of IFN.F I G U R E 7 USP18 −/− iMacs have enhanced STAT phosphorylation and enhanced ISG expression."

reach
"Hence, through stabilizing the interaction between STAT2 and IFNAR2, USP18 may also negatively regulate the STAT phosphorylation process by decreasing the STAT phosphorylation turnover rate and the activation of the ISGF3 complex."
USP18 dephosphorylates STAT.
| 2
USP18 leads to the dephosphorylation of STAT. 2 / 2
| 2

reach
"Hence, through stabilizing the interaction between STAT2 and IFNAR2, USP18 may also negatively regulate the STAT phosphorylation process by decreasing the STAT phosphorylation turnover rate and the activation of the ISGF3 complex."

reach
"Patient-derived fibroblasts showed enhanced IFN-induced inflammation and enhanced and prolonged STAT phosphorylation which could be reversed by transduction of cells with wild-type USP18."
WT1 affects USP18
| 8 9
WT1 binds USP18.
| 1 9
| 1 9

sparser
"In order to determine whether WT1 binds to the Usp18 promoter, cross-linked protein-DNA fragments were immunoprecipitated by anti-WT1 antibody from M15 cell lysates."

sparser
"In both murine and human cell lines, an increase expression of USP18 is associated with the activity of WT1."

sparser
"WT1 binds directly to the Usp18 promoter and suppresses its transcription."

sparser
"In order to study further the interaction between WT1 and the Usp18 promoter, we attempted to identify regions in the promoter conserved between mouse and human."

reach
"Furthermore, direct binding of WT1 to the Usp18 promoter was demonstrated by ChIP assay."

sparser
"By luciferase reporter assay we identified the shortest promoter fragment responsible for WT1-mediated repression and also demonstrated direct binding of WT1 to the promoter of Usp18 ."

sparser
"Collectively these results indicate that WT1 specifically binds to the endogenous Usp18 promoter."

sparser
"Furthermore, direct binding of WT1 to the Usp18 promoter was demonstrated by ChIP assay."

sparser
"Furthermore, to demonstrate WT1 binding to the USP18 promoter in human cells, we used T-REx™ -293 WT1(-KTS) cells in which FLAG-tagged WT1 (-KTS) expression can be induced."

sparser
"While we were able to demonstrate robust binding of WT1 to the Usp18 promoter by ChIP-Seq, this promoter was not identified by a ChIP-chip analysis of chromatin from a later stage of mouse kidney development (E18.5) [ xref ]."
WT1 decreases the amount of USP18.
| 6
WT1 decreases the amount of USP18. 6 / 6
| 6

reach
"A variety of subsequent, in vitro experiments consistently supported the notion that WT1 suppresses Usp18 expression, and we therefore conclude that Usp18 is a bona fide target for WT1 transcriptional regulatory function in the embryonic kidney."

reach
"Taken together our data demonstrate that Usp18 is a transcriptional target of WT1 and suggest that increased expression of USP18 following WT1 loss contributes to Wilms tumorigenesis."

reach
"These two independent experiments suggest that WT1 represses Usp18 expression in mammalian cells."

reach
"Taken together our data suggest that increased expression of USP18 following WT1 loss contributes to Wilms tumorigenesis."

reach
"Despite this increased expression, this truncated WT1 still was unable to repress the expression of the Usp18 reporter construct."

reach
"Cumulatively, these data indicate that WT1 (-KTS) down-regulates Usp18 expression via direct or indirect interaction with the Usp18 promoter."
WT1 increases the amount of USP18.
| 1
WT1 increases the amount of USP18. 1 / 3
| 1

reach
"This suggests that the WT1 (-KTS) isoform modulates USP18 expression but not the WT1 (+ KTS) isoform."
USP18 affects JAK1
| 1 12 3
USP18 inhibits JAK1.
| 1 4
USP18 inhibits JAK1. 4 / 6
| 1 3

eidos
"USP18 interacts with IFNAR2 to prevent JAK1 from interacting with IFNAR2 , and thus , USP18 suppresses signal transmission from IFN-alpha binding [ 47 , 48 ] ."

reach
"Postactivation silencing of IFNAR signaling is achieved quickly after IFN exposure and is mediated by at least two proteins that are ISGs themselves and therefore accumulate in response to IFN: Suppressor of cytokine signaling 1 (SOCS1) binds and inhibits TYK2, whereas USP18 (UBP43) occupies IFNAR2 and hence blocks JAK1 activation (83, 84)."

reach
"USP18 interacts with IFNAR2 to prevent JAK1 from interacting with IFNAR2, and thus, USP18 suppresses signal transmission from IFN-α binding [47,48]."

reach
"One group has proposed that USP18 attenuates IFN alpha signaling regardless of the isopeptidase activity of the protein by competitively displacing Jak1 from its interaction with IFNAR2 XREF_BIBR."
USP18 bound to IFNAR2 inhibits JAK1. 1 / 1
| 1

reach
"USP18 interacts with IFNAR2 to prevent JAK1 from interacting with IFNAR2, and thus, USP18 suppresses signal transmission from IFN-alpha binding [XREF_BIBR, XREF_BIBR]."
USP18 dephosphorylates JAK1.
| 6
USP18 leads to the dephosphorylation of JAK1. 4 / 4
| 4

reach
"XREF_BIBR, XREF_BIBR In turn, USP18 specifically binds to the IFNAR2 subunit and thereby prevents the phosphorylation of JAK1 by blocking the interaction of JAK1 and the IFNAR2 subunit and downstream signaling."

reach
"Following exposure to IFN-I, metallophilic macrophages induce expression of the Usp18 protein which prevents Jak1 phosphorylation and inhibits IFN-I signaling in these cells."

reach
"6, 20 In turn, USP18 specifically binds to the IFNAR2 subunit and thereby prevents the phosphorylation of JAK1 by blocking the interaction of JAK1 and the IFNAR2 subunit and downstream signaling."

reach
"USP18 reduced IFN binding and receptor dimerization as well as JAK1 phosphorylation only when STAT2 was present."
Modified USP18 leads to the dephosphorylation of JAK1. 2 / 2
| 2

reach
"Metallophilic macrophages have been demonstrated to induce expression of the Usp18 protein which prevents Jak1 phosphorylation and inhibits IFN-I signaling in these cells."

reach
"Following exposure to IFN-I, metallophilic macrophages induce expression of the Usp18 protein which prevents Jak1 phosphorylation and inhibits IFN-I signaling in these cells."
USP18 binds JAK1.
| 2 3
| 2 3

sparser
"Binding of UBP43 to IFNAR2 in vivo displaced JAK1 from IFNAR2 and led to the inhibition of the downstream phosphorylation cascade and other signaling events [51]."

reach
"Based on mutational studies it was suggested that USP18 binds to the intracellular region of type I IFN receptor subunit IFNAR2 and outcompetes the downstream kinase JAK1 thereby abrogating IFN signaling36."

reach
"Based on mutational studies it was suggested that USP18 binds to the intracellular region of type I IFN receptor subunit IFNAR2 and outcompetes the downstream kinase JAK1 thereby abrogating IFN signaling XREF_BIBR."

sparser
"Binding of UBP43 to IFNAR2 in vivo displaced JAK1 from IFNAR2 and led to the inhibition of the downstream phosphorylation cascade and other signaling events xref ."

sparser
"The molecular mechanisms remain incompletely understood, but ISG15 seems to stabilize binding of USP18 to JAK1 which inhibits activation of STATs."
USP18 affects STING1
2 | 7 6
USP18 binds STING1.
2 | 1 6
2 | 1 2

No evidence text available

reach
"Zhang et al. studied the effect of USP18 (also known as UBP43) on STING and revealed that USP18 interacts with STING to affect IFN-promotor activity [XREF_BIBR]."

sparser
"Zhang et al. studied the effect of USP18 (also known as UBP43) on STING and revealed that USP18 interacts with STING to affect IFN-promotor activity [ xref ]."

sparser
"Zhang et al. studied the effect of USP18 (also known as UBP43) on STING and revealed that USP18 interacts with STING to affect IFN-promotor activity [41]."

No evidence text available
| 4

sparser
"Our above results demonstrated that (1) USP18 and USP20 correlate with limited oHSV-1 T1012G virus yields in SCC9 cells; (2) USP18 and USP20 interact with STING and alter the levels of STING proteins in SCC9 cells; and (3) altered STING accumulation regulates viral replication in SCC9 and SCC25 cells, while we need to further examine whether the DUB activity of USP18 or USP20 is crucial for the regulation of STING stabilization and oHSV-1 T1012G virus replication."

sparser
"Collectively, these results showed that USP18 and USP20 interact with STING and that a deficiency of either USP18 or USP20 affects the stability of STING in SCC9 cells."

sparser
"Immunoprecipitation revealed that both USP18 and USP20 interacted with the N-terminal region of the STING protein."

sparser
"We found that USP18 and USP20 both interact with STING in SCC9 cells."
USP18 deubiquitinates STING1.
| 4
USP18 deubiquitinates STING1. 4 / 4
| 4

reach
"USP18 does not deubiquitinate STING in vitro but facilitates USP20 to catalyze deubiquitination of STING in a manner independently of the enzymatic activity of USP18 (91)."

reach
"USP18 did not deubiquitinate STING in vitro but facilitated USP20 to catalyze deubiquitination of STING in a manner independent of the enzymatic activity of USP18."

reach
"Subsequently, they searched for DUBs that interact with USP18 and found that knockdown of USP20 inhibited USP18 induced deubiquitination of STING and knockdown of USP18 inhibited USP20 induced deubiquitination of STING [XREF_BIBR]."

reach
"These results together supported that although USP18 does not deubiquitinate STING itself, USP18 recruits USP20 to deubiquitinate STING to suppress IFN synthesis [41]."
USP18 activates STING1.
| 1
USP18 activates STING1. 1 / 3
| 1

reach
"And, Zhang M. et al. have reported that USP18 recruits USP20 to deconjugate K48 linked ubiquitination chains from STING and promotes the stability of STING [XREF_BIBR]."
USP18 inhibits STING1.
| 1
USP18 inhibits STING1. 1 / 1
| 1

reach
"USP18 deficiency or knockdown of USP20 resulted in enhanced K48 linked ubiquitination and accelerated degradation of STING, and impaired activation of IRF3 and NF-kappaB as well as induction of downstream genes after infection with DNA virus HSV-1 or transfection of various DNA ligands."
MAP3K7 affects USP18
2 | 8 3
MAP3K7 binds USP18.
2 | 5 3
2 | 4 2

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."

sparser
"However, NEMO deficiency did not lead to loss of interaction between USP18 and TAK1 ( xref ), suggesting that USP18 targets TAK1 complex and IKK complex by distinct mechanisms."

sparser
"Although USP18 mutants can still bind to ubiquitinated TAK1, it fails to cleave the polyubiquitin chains, resulting in a stable USP18-ubiquitinated-TAK1 complex."

reach
"Interestingly, in transfection experiments, Usp18 bound to and deubiquitinated Tak1, thereby reducing its kinase activity and the associated downstream signaling."

reach
"We next examined whether USP18 interacted with TAK1."

No evidence text available

No evidence text available

reach
"However, NEMO deficiency did not lead to loss of interaction between USP18 and TAK1 (XREF_FIG), suggesting that USP18 targets TAK1 complex and IKK complex by distinct mechanisms."
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
Mutated USP18 binds ubiquitinated MAP3K7. 1 / 1
| 1

reach
"Although USP18 mutants can still bind to ubiquitinated TAK1, it fails to cleave the polyubiquitin chains, resulting in a stable USP18, ubiquitinated, and TAK1 complex."
MAP3K7 activates USP18.
| 3
MAP3K7 activates USP18. 3 / 3
| 3

reach
"After TLR ligand stimulation, TAK1 and NEMO undergo K63 linked ubiquitination by TRAF6, while upregulated USP18 targets TAK1 and NEMO."

reach
"However, NEMO deficiency did not lead to loss of interaction between USP18 and TAK1 (XREF_FIG), suggesting that USP18 targets TAK1 complex and IKK complex by distinct mechanisms."

reach
"Considering the phenotypes observed with Tak -/- and Usp18 -/- T cells or Usp18 -/- T cells transfected with USP18 (WT) or USP18 (C61S), we further hypothesized that USP18 targets TAK1 complex and catalyzes deubiquitination of TAK1."
USP18 affects TAB1
2 1 | 10 2
USP18 binds TAB1.
2 | 4 2
2 | 4 1

reach
"We also found that USP18 weakly interacts with TAB1 alone (XREF_FIG), but it has higher affinity for the TAK1 and TAB1 complex in the presence of TAK1 (XREF_FIG)."

No evidence text available

reach
"However, USP18 binds to TAB1 and inhibits the ubiquitination of the TAB1 and TAK1 complex."

sparser
"We also found that USP18 weakly interacts with TAB1 alone ( xref ), but it has higher affinity for the TAK1-TAB1 complex in the presence of TAK1 ( xref )."

No evidence text available

reach
"In overexpression and co-immunoprecipitation assays, USP18 interacted with TAB1 and CARMA1 but not with NEMO constitutively (XREF_FIG and not depicted)."

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
USP18 deubiquitinates TAB1.
1 | 5
USP18 deubiquitinates TAB1. 6 / 6
1 | 5

"USP18 is associated with and deubiquitinates the TAK1-TAB1 complex"

reach
"Previous studies showed that USP18 potently abolishes the polyubiquitination of TAK1 and TAB1 complex XREF_BIBR."

reach
"To further examine whether USP18 deubiquitinates the TAK1 and TAB1 complex, we purified Flag tagged USP18 from 293T cells transiently transfected with Flag-USP18 plasmid by immunoprecipitation with anti-Flag agarose and elution with Flag peptide."

reach
"Importantly, USP18 is associated with and deubiquitinates the TAK1 and TAB1 complex, thereby restricting expression of IL-2."

reach
"In contrast, they suggest that USP18 inhibits ubiquitination of the TAK1 and TAB1 complex in a protease dependent manner XREF_BIBR, XREF_BIBR."

reach
"In contrast, they suggest that USP18 inhibits ubiquitination of the TAK1/TAB1 complex in a protease dependent manner30,31."
USP18 ubiquitinates TAB1.
| 1
USP18 leads to the ubiquitination of TAB1. 1 / 1
| 1

reach
"USP18 inhibits NF-kappaB and NFAT activation during Th17 differentiation by deubiquitinating the TAK1 and TAB1 complex."
USP18 affects JAK-STAT
| 2 12
USP18 inhibits JAK-STAT.
| 2 9
USP18 inhibits JAK-STAT. 10 / 10
| 2 8

reach
"USP18 was shown to bind to IFNAR2 and attenuate the JAK-STAT pathway, thereby negatively regulating IFN signaling (XREF_TABLE)."

reach
"A majority of these genes are responsible for the regulation and control of early innate inflammation such as USP18 which disrupts the JAK-STAT pathway downstream of the IFN receptor, and TIFAB which inhibits the activation of the NFkappaB pathway."

reach
"A majority of these genes are responsible for the regulation and control of early innate inflammation, such as USP18, which disrupts the JAK-STAT pathway downstream of the IFN receptor (43), and TIFAB, which inhibits the activation of the NF-κB pathway (44)."

eidos
"Another ISG : the ubiquitin-specific peptidase 18 ( USP18 ) suppresses JAK-STAT signaling induced by type I IFN at the level of IFN receptor ."

reach
"Recent data by Zhang and coworkers revealed, however, that USP18 attenuates JAK-STAT signaling, and thereby the type 1 IFN response, in a non enzymatic manner, i.e., by directly competing with JAK1 for binding to the IFNAR2 subunit of the type 1 IFN receptor."

reach
"We found that, beyond being a key effector of IFN signaling, STAT2 is essential for USP18 mediated inhibition of JAK-STAT signaling."

reach
"A majority of these genes are responsible for the regulation and control of early innate inflammation, such as USP18, which disrupts the JAK-STAT pathway downstream of the IFN receptor (43) , and TIFAB, which inhibits the activation of the NF-k B pathway (44) ."

reach
"Recent data by Zhang and coworkers (Malakhova et al., 2006) revealed, however, that USP18 attenuates JAK-STAT signaling, and thereby the type 1 IFN response, in a non-enzymatic manner, i.e., by directly competing with JAK1 for binding to the IFNAR2 subunit of the type 1 IFN receptor."

eidos
"Recent data by Zhang and coworkers ( Malakhova et al ., 2006 ) revealed , however , that USP18 attenuates JAK-STAT signaling , and thereby the type 1 IFN response , in a non-enzymatic manner , i.e ., by directly competing with JAK1 for binding to the IFNAR2 subunit of the type 1 IFN receptor ."

reach
"USP18 was shown to bind to IFNAR2 and attenuate the JAK-STAT pathway, thereby negatively regulating IFN signaling (Table 1) ."
USP18 bound to IFNAR2 inhibits JAK-STAT. 1 / 1
| 1

reach
"Unlike SOCS proteins, USP18 binds IFNAR2 to block the activation of the JAK-STAT pathway induced by IFNα (Francois-Newton et al., 2011) ."
USP18 activates JAK-STAT.
| 3
USP18 activates JAK-STAT. 3 / 3
| 3

reach
"Similarly, USP18, a ubiquitin-specific peptidase, is stimulated by JAK-STAT signaling and provides negative feedback to this pathway by binding IFNAR2, resulting in the promotion of viral replication [80]."
| PMC

reach
"As far as IFN-alpha response is concerned, a prominent example is the modulation of JAK-STAT signalling by the ubiquitin peptidase USP18 [XREF_BIBR, XREF_BIBR]."

reach
"In the initial experiments demonstrating IFN desensitization, ISGF3 gel shift assays and STAT1 phosphorylation levels indicated that the presence of IFN-β failed to result in prolonged JAK-STAT signaling in USP18-expressing cells; in contrast, signaling was maintained in Usp18 −/− cells (105) ."
USP18 affects JAK
| 9
USP18 inhibits JAK.
| 5
USP18 inhibits JAK. 5 / 9
| 5

reach
"Taken together, we concluded that USP18 potentiates the anti-HBV activity of IFN-alpha by targeting the JAK and STAT signaling pathway in Hepg2.2.15 cells."

reach
"Moreover, USP18 competitively inhibits IFN-alpha and beta-induced JAK and STAT activation [XREF_BIBR] and upregulates epidermal growth factor receptor (EGFR) expression [XREF_BIBR]."

reach
"It has been reported that C-terminal region of USP18 (amino acid residue 312-368) competes with Jak1 for interacting with the type I IFN receptor (IFNAR2) and represses downstream Jak and STAT signaling pathway [XREF_BIBR]."

reach
"As expected, exogenous USP18 expression significantly inhibited IFN-a-induced Jak and STAT signaling as shown by decreased p-STAT1 levels and ISRE activity."

reach
"Suppression of USP18 activated the JAK and STAT signaling pathway as shown by the increased and prolonged expression of phosphorylated signal transducer and activator of transcription 1 (p-STAT1) in combination with enhanced expression of several interferon stimulated genes (ISGs)."
USP18 activates JAK.
| 4
USP18 activates JAK. 4 / 5
| 4

reach
"Ye et al. (2021) demonstrated that DENV-2 infection increased USP18 expression; USP18 overexpression enhanced DENV-2 replication, while USP18 silencing inhibited DENV-2 replication by activating the IFN-α-mediated JAK/STAT signaling pathway."

reach
"By inhibiting the JAK/STAT pathway and suppressing the downstream effects of type I IFN signaling USP18 effectively reduces auto-inflammatory pathogenesis."

reach
"In contrast, silencing USP18 activates the Jak and STAT signaling and potentiates IFN anti-HCV ativity [XREF_BIBR]."

reach
"USP18, a protein of 368 aa in length and an ISG15 isopeptidase, is a negative regulator of type I and III IFN-activated JAK/STAT signaling [142], and is rapidly upregulated by viral infection and IFNs."
USP18 affects ubiquitination
| 13
USP18 inhibits ubiquitination. 10 / 13
| 13

sparser
"We found that USP18 could further inhibit K63-linked ubiquitination of NEMO in the presence of IsoT ( xref ), suggesting that USP18 primarily blocked the linkage of conjugated K63-linked polyubiquitin chains on NEMO."

sparser
"We next tested whether USP18 inhibited NEMO ubiquitination through USP18 protease activity."

sparser
"This suggests that USP18 may specifically inhibit the K63-linked ubiquitination of NEMO at the Lys −325 and −326 sites."

sparser
"Conversely, USP18 inhibited NEMO ubiquitination by directly binding to its UBAN motif (ubiquitin binding in ABIN and NEMO) and masking its ubiquitination sites at Lys 325 and 326 from further K63-linked ubiquitination."

sparser
"USP18 inhibits the K63-linked ubiquitination of TAK1 and NEMO through distinct mechanisms ( xref )."

sparser
"On the other hand, USP18 inhibits NEMO ubiquitination by directly binding to its UBAN domain."

sparser
"USP18 can inhibit the ubiquitination of the TAK1-TAB complex, thereby inhibiting IL-2 production and promoting IL-17 production and synthesis."

sparser
"Our results demonstrated that USP18 inhibits covalently conjugated K63-linked ubiquitination of NEMO but had little or no effects on the linear (M1) ubiquitination of NEMO."

sparser
"In contrast, they suggest that USP18 inhibits ubiquitination of the TAK1/TAB1 complex in a protease dependent manner xref , xref ."

sparser
"USP18 inhibits the K63-linked ubiquitination of TAK1 in a protease-dependent manner."
USP18 affects EGFR
| 12
USP18 activates EGFR.
| 9
USP18 activates EGFR. 9 / 10
| 9

reach
"In addition, the results indicated that USP18 may promote the epidermal growth factor (EGF)-mediated EGF receptor (EGFR)/AKT/S-phase kinase associated protein2 (Skp2) pathway by upregulating EGFR and Skp2 in a AKT and forkhead boxO3 dependent manner in breast cancer."

reach
"USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway."

reach
"Inhibition of USP18 reduces the levels of EGFR and other oncogenic proteins and inhibits the tumorigenic activity of cancer cells."

reach
"However, USP18 has independent direct effects on tumor growth and survival and enhances EGFR signaling by decreasing miR-7 expression, which targets EGFR [54]."

reach
"However, USP18 has independent direct effects on tumor growth and survival and enhances EGFR signaling by decreasing miR-7 expression, which targets EGFR XREF_BIBR."

reach
"For instance, Tan et al. found that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway [XREF_BIBR]."

reach
"Moreover, USP18 competitively inhibits IFN-alpha and beta-induced JAK and STAT activation [XREF_BIBR] and upregulates epidermal growth factor receptor (EGFR) expression [XREF_BIBR]."

reach
"In addition, the results indicated that USP18 may promote the epidermal growth factor (EGF)-mediated EGF receptor (EGFR)/AKT/S-phase kinase associated protein2 (Skp2) pathway by upregulating EGFR and Skp2 in a AKT and forkhead boxO3 dependent manner in breast cancer."

reach
"Tan et al. have demonstrated that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway."
USP18 increases the amount of EGFR.
| 2
USP18 increases the amount of EGFR. 2 / 2
| 2

reach
"In an RNA interference screen of 106 different genes related to deubiquitination, silencing of USP18 reduced EGFR expression without affecting the levels of other receptor tyrosine kinases [XREF_BIBR]."

reach
"We found that knockdown of Usp18 in several cell lines reduced expression levels of EGFR by 50-80%, whereas the levels of other receptor tyrosine kinases remained unchanged."
USP18 inhibits EGFR.
| 1
USP18 inhibits EGFR. 1 / 1
| 1

reach
"This suggests that depletion of Usp18 inhibited EGFR mRNA translation."
USP18 affects BCL2L1
| 5 6
USP18 binds BCL2L1.
| 4 6
| 4 6

sparser
"The reciprocal immunoprecipitation experiment using anti-USP18 antibody also confirmed the binding of BCL2L1 and USP18 ( Fig. 6 A)."

reach
"In addition, a mitochondrial Co-IP also showed a direct interaction between BCL2L1 and USP18 in Hep3B cells."

reach
"These findings indicated that BCL2L1 was positively regulated by USP18, and the effect of USP18 on the proliferation and apoptosis of HCC cells was achieved by BCL2L1.Since the regulation of USP18 on [MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"

reach
"The reciprocal immunoprecipitation experiment using anti-USP18 antibody also confirmed the binding of BCL2L1 and USP18."

sparser
"These results indicate that the BH3 domain of BCL2L1 is critical for the interaction between USP18 with BCL2L1."

reach
"Mechanistically, we found that USP18 directly bind to BCL2L1 and positively regulated its expression in HCC cells."

sparser
"In addition, a mitochondrial Co-IP also showed a direct interaction between BCL2L1 and USP18 in Hep3B cells ( Fig. 6 D)."

sparser
"Since the regulation of USP18 on BCL2L1, we further evaluated whether USP18 could directly bind BCL2L1 to affect cell-cycle progression."

sparser
"Mechanistically, we found that USP18 directly bind to BCL2L1 and positively regulated its expression in HCC cells."

sparser
"Interestingly, in transfected cells, we found that the deletion of the BH3 domain abrogated the interaction between USP18 with BCL2L1 ( Fig. 6 E)."
USP18 activates BCL2L1.
| 1
USP18 activates BCL2L1. 1 / 2
| 1

reach
"Downregulation of USP18 inhibits growth and induces apoptosis in hepatitis B virus related hepatocellular carcinoma cells by suppressing BCL2L1."
IKBKG affects USP18
2 | 3 6
2 | 3 4

reach
"Next, we examined whether USP18 directly interacts with NEMO."

sparser
"Next, we examined whether USP18 directly interacts with NEMO."

sparser
"Co-immunoprecipitation experiments showed that USP18 only interacted with full length (FL) NEMO or its UBAN domain ( xref )."

No evidence text available

reach
"Little binding between USP18 and NEMO or between USP18 and IKKbeta was observed in unstimulated cells."

sparser
"To further confirm endogenous interaction between USP18 and NEMO, we stimulated THP-1 derived macrophages with LPS for various time points."

sparser
"Mutation analysis revealed direct binding of USP18 to the UBAN motif of NEMO."

reach
"To further confirm endogenous interaction between USP18 and NEMO, we stimulated THP-1 derived macrophages with LPS for various time points."

No evidence text available
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."

sparser
"Taken together, these results suggest that in addition to the TAK1-TAB1 complex, USP18 also interacts with the IKK complex upon LPS treatment in a NEMO-dependent manner."
USP20 affects USP18
| 10
| 6

sparser
"Immunoprecipitation revealed that STING, USP18 and USP20 are arranged as USP20-USP18-STING, but both USP20 and USP18 were associated with the N-terminus of STING [ xref ]."

sparser
"USP18-USP20 mediated the accumulation of STING that regulates oHSV-1 T1012G viral lytic replication in SCC9 cells."

sparser
"In 2016, Zhang et al. [61] reported that USP18 interacts with the deubiquitinase USP20 and recruits it to stimulator of interferon genes (STING)."

sparser
"Immunoprecipitation revealed that STING, USP18 and USP20 are arranged as USP20-USP18-STING, but both USP20 and USP18 were associated with the N-terminus of STING [41]."

sparser
"All the above results indicate that USP18-USP20 mediated the accumulation of STING function with limited oHSV-1 T1012G virus yields in SCC9 cells."

sparser
"In 2016, Zhang et al. [ xref ] reported that USP18 interacts with the deubiquitinase USP20 and recruits it to stimulator of interferon genes (STING)."
| 4

sparser
"Our above results demonstrated that (1) USP18 and USP20 correlate with limited oHSV-1 T1012G virus yields in SCC9 cells; (2) USP18 and USP20 interact with STING and alter the levels of STING proteins in SCC9 cells; and (3) altered STING accumulation regulates viral replication in SCC9 and SCC25 cells, while we need to further examine whether the DUB activity of USP18 or USP20 is crucial for the regulation of STING stabilization and oHSV-1 T1012G virus replication."

sparser
"Collectively, these results showed that USP18 and USP20 interact with STING and that a deficiency of either USP18 or USP20 affects the stability of STING in SCC9 cells."

sparser
"Immunoprecipitation revealed that both USP18 and USP20 interacted with the N-terminal region of the STING protein."

sparser
"We found that USP18 and USP20 both interact with STING in SCC9 cells."
USP18 affects NOTCH1
| 6 6
USP18 binds NOTCH1.
| 3 4
| 3 4

reach
"These experiments verified that USP18 could directly bind to Notch1 and regulate c-Myc expression via Notch1."

reach
"In our study, by screening a panel of DUBs, we demonstrated that USP18 interacts with Notch1."

sparser
"First, USP18 and Notch1 directly interact in pancreatic cancer cells."

sparser
"To test this hypothesis, we first observed whether USP18 and Notch1 directly interact in pancreatic cancer cells, and interestingly, co-IP demonstrated an interaction between USP18 and Notch1 ( xref and xref )."

sparser
"These experiments verified that USP18 could directly bind to Notch1 and regulate c-Myc expression via Notch1."

reach
"To test this hypothesis, we first observed whether USP18 and Notch1 directly interact in pancreatic cancer cells, and interestingly, co-IP demonstrated an interaction between USP18 and Notch1 (XREF_FIG and XREF_FIG)."

sparser
"In our study, by screening a panel of DUBs, we demonstrated that USP18 interacts with Notch1."
USP18 inhibits NOTCH1.
| 3
USP18 inhibits NOTCH1. 3 / 3
| 3

reach
"Second, USP18 overexpression reduces the K48 linked ubiquitination level of Notch1, whereas USP18 silencing significantly increases the Notch1 K48 linked ubiquitination."

reach
"Moreover, USP18 overexpression reduced the K48 linked ubiquitination level of Notch1, whereas USP18 silencing significantly increased Notch1 K48 linked ubiquitination (XREF_FIG - XREF_FIG)."

reach
"Indeed, we found here that USP18 silencing could increase the turnover rate of Notch1 in the presence of cycloheximide (CHX) (XREF_FIG and XREF_FIG)."
USP18 ubiquitinates NOTCH1.
| 2
USP18 ubiquitinates NOTCH1. 2 / 2
| 2

sparser
"Given that knockdown of USP18 leads to increased K48-linked ubiquitination of proteins, we speculated that USP18 K48-linked ubiquitination of Notch1 and thus stabilizes Notch1."

sparser
"Second, USP18 overexpression reduces the K48-linked ubiquitination level of Notch1, whereas USP18 silencing significantly increases the Notch1 K48-linked ubiquitination."
USP18 affects MAVS
| 12
| 12

sparser
"We observed that the interaction between MAVS and USP18 was not affected by this mutation (Fig.  xref )."

sparser
"The results showed that USP18 mainly interacted with MAVS, while there was no or weak association with upstream molecules RIG-I or MDA5 and downstream molecules TBK1 or IRF3 in the RLRs signaling pathway (Fig.  xref )."

sparser
"The interaction between USP18 and MAVS is enhanced following viral infection, suggesting the possible regulation of MAVS activity by USP18."

sparser
"The elevated endogenous interaction between MAVS and USP18 was also confirmed in the RAW264.7 cells upon SeV infection (Fig.  xref )."

sparser
"Notably, we also observed that the endogenous interaction between USP18 and MAVS was enhanced following the SeV infection in THP-1 cells (Fig.  xref ), indicating that USP18 may play a role in modulating the activity of MAVS."

sparser
"USP18 C64S , the mutation of cysteine residues in the enzymatic center of USP18, can interact with MAVS and enhances the ubiquitination as well as aggregation of MAVS comparable to the wild-type USP18, suggesting USP18 is involved in MAVS-mediated signaling pathway independent of its enzymatic activity."

sparser
"Since MAVS is localized in mitochondria, we further isolated the mitochondrial fraction and observed an enhanced interaction between MAVS and USP18 in mitochondria following SeV infection (Fig.  xref )."

sparser
"Here, we demonstrate that a mitochondria-localized deubiquitinase USP18 specifically interacts with MAVS, promotes K63-linked polyubiquitination and subsequent aggregation of MAVS."

sparser
"To investigate whether USP18 specifically interacts with MAVS, we utilized the Co-IP assay to examine the interaction between the signaling molecules in the RLR signaling pathway and USP18."

sparser
"The spatial colocalization and interaction between USP18 and MAVS were further confirmed by in situ proximity ligation assay (PLA), in which the number of red spots displaying the interaction between USP18 and MAVS."
USP18 is modified
| 10 2
USP18 is ubiquitinated.
| 9
USP18 is ubiquitinated. 9 / 9
| 9

sparser
"Moreover, we investigated the potential relationships between USP18 ubiquitination and Sanil1 in USP18 over-expressed DLD1 cells."

sparser
"The non-covalent interactions of ISG15 and USP18 prevent the ubiquitination of USP18 by S-phase kinase-associated protein two and stabilize the downregulation of the IFN signaling pathway by USP18 ( xref ; xref )."

sparser
"Yet, engineered gain of USP18 expression downregulated total ubiquitination and UBE1 levels ( xref ), providing a mechanistic basis through which the DUB USP18 affects UCP1 expression."

sparser
"SKP (S-phase kinase-associated protein)-Cullin-F-box protein (SCF SKP2 ) facilitates USP18 ubiquitination and subsequent degradation by the proteasomes."

sparser
"Therefore, in the absence of ISG15, uSP18 is ubiquitylated and degraded, and an important negative regulator of type I interferon receptor signalling is lost."

sparser
"The non-covalent interactions of ISG15 and USP18 prevent the ubiquitination of USP18 by S-phase kinase-associated protein two and stabilize the downregulation of the IFN signaling pathway by USP18 (Tokarz et al., 2004; Zhang et al., 2015)."

sparser
"In this study, we demonstrate that UBP43 is ubiquitinated in vivo and accumulates in cells treated with proteasome inhibitors."

sparser
"Given that knockdown of USP18 leads to increased K48-linked ubiquitination of proteins, we speculated that USP18 K48-linked ubiquitination of Notch1 and thus stabilizes Notch1."

sparser
"Skp2 promotes the ubiquitination of UBP43 and subsequent degradation by the proteasomes, suggesting that the SCFSkp2 may be involved in the regulation of type I IFN signaling by controlling the stability of UBP43."
USP18 is phosphorylated.
| 1 2
USP18 is phosphorylated. 3 / 3
| 1 2

sparser
"In contrast to what was observed for human fibroblasts, WT and Isg15 -deficient MEFs accumulated similar levels of phosphorylated Stat2, Ifit2 and Usp18 over the time course of the experiment ( xref )."

rlimsp
"Specifically, IFN-α induced the phosphorylation of STAT1 and USP18 silencing enhanced the STAT1 activation and phosphorylation for a longer periods of time compared to the control group (Fig 6C), leading to increased expression of ISGs, and thus enhanced the antiviral activity against HBV in Hepg2.2.15 cells."

rlimsp
"We used antibodies against STAT2 (EMD Millipore), phosphorylated Tyr689 STAT2 (EMD Millipore), USP18 (Cell Signaling Technology), β-tubulin (Takara Bio Inc.), ISG15 (gift from E.C. Borden, Cleveland Clinic, Cleveland, OH), IFIT1 (gift from G. Sen, Cleveland Clinic, Cleveland, OH), and Mx1 (MxA; gift from O. Haller, University of Freiburg, Freiburg, Germany)."
MAVS affects USP18
| 12
| 12

sparser
"We observed that the interaction between MAVS and USP18 was not affected by this mutation (Fig.  xref )."

sparser
"The results showed that USP18 mainly interacted with MAVS, while there was no or weak association with upstream molecules RIG-I or MDA5 and downstream molecules TBK1 or IRF3 in the RLRs signaling pathway (Fig.  xref )."

sparser
"The interaction between USP18 and MAVS is enhanced following viral infection, suggesting the possible regulation of MAVS activity by USP18."

sparser
"The elevated endogenous interaction between MAVS and USP18 was also confirmed in the RAW264.7 cells upon SeV infection (Fig.  xref )."

sparser
"Notably, we also observed that the endogenous interaction between USP18 and MAVS was enhanced following the SeV infection in THP-1 cells (Fig.  xref ), indicating that USP18 may play a role in modulating the activity of MAVS."

sparser
"USP18 C64S , the mutation of cysteine residues in the enzymatic center of USP18, can interact with MAVS and enhances the ubiquitination as well as aggregation of MAVS comparable to the wild-type USP18, suggesting USP18 is involved in MAVS-mediated signaling pathway independent of its enzymatic activity."

sparser
"Since MAVS is localized in mitochondria, we further isolated the mitochondrial fraction and observed an enhanced interaction between MAVS and USP18 in mitochondria following SeV infection (Fig.  xref )."

sparser
"Here, we demonstrate that a mitochondria-localized deubiquitinase USP18 specifically interacts with MAVS, promotes K63-linked polyubiquitination and subsequent aggregation of MAVS."

sparser
"To investigate whether USP18 specifically interacts with MAVS, we utilized the Co-IP assay to examine the interaction between the signaling molecules in the RLR signaling pathway and USP18."

sparser
"The spatial colocalization and interaction between USP18 and MAVS were further confirmed by in situ proximity ligation assay (PLA), in which the number of red spots displaying the interaction between USP18 and MAVS."
USP18 affects cell growth
| 9 1
USP18 activates cell growth.
| 7
| 7

reach
"Likewise, engineered loss of USP18 expression decreased lung cancer cell growth and increased apoptosis in these cancer cells [XREF_BIBR and LM Mustachio personal communication]."

reach
"Subsequently, we demonstrated that knockdown of USP18 inhibited HCC cell growth and caused cell-cycle arrest and early apoptosis."

reach
"USP18 promotes PC cell growth by facilitating cell cycle progression."

reach
"Consonant with our observation of enhanced cell proliferation of HEK293 and M15 cells upon exogenous Usp18 expression, a similar promotion of cellular growth by Usp18 has recently been reported in an acute promyelocytic leukemic cell lines [XREF_BIBR]."

reach
"USP18 promotes PC cell growth in vitro and in vivo."

reach
"To further understand the mechanism by which USP18 contributes to PC cell growth, we investigated the effects of USP18 knockdown on the cell cycle and apoptosis."

reach
"Another study showed that USP18 expression was increased in malignant versus normal lung tissue, and loss of USP18 expression decreased lung cancer cell growth and increased apoptosis in these cancer [MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"
USP18 inhibits cell growth.
| 2 1
| 2 1

reach
"For instance, downregulation of USP18 reduces acute promyelocytic leukaemia cell growth and induces apoptosis, whereas silencing USP18 in glioblastoma cells enhances IFN induced apoptosis [XREF_BIBR]."

reach
"The CCK8 and EdU assay data showed that silencing USP18 obviously suppressed pancreatic cancer cell growth in vitro (XREF_FIG, XREF_FIG)."

sparser
"Subsequently, we demonstrated that knockdown of USP18 inhibited HCC cell growth and caused cell-cycle arrest and early apoptosis."
USP18 affects WT1
| 2 9
USP18 binds WT1.
| 1 9
| 1 9

sparser
"In order to determine whether WT1 binds to the Usp18 promoter, cross-linked protein-DNA fragments were immunoprecipitated by anti-WT1 antibody from M15 cell lysates."

sparser
"In both murine and human cell lines, an increase expression of USP18 is associated with the activity of WT1."

sparser
"WT1 binds directly to the Usp18 promoter and suppresses its transcription."

sparser
"In order to study further the interaction between WT1 and the Usp18 promoter, we attempted to identify regions in the promoter conserved between mouse and human."

reach
"Furthermore, direct binding of WT1 to the Usp18 promoter was demonstrated by ChIP assay."

sparser
"By luciferase reporter assay we identified the shortest promoter fragment responsible for WT1-mediated repression and also demonstrated direct binding of WT1 to the promoter of Usp18 ."

sparser
"Collectively these results indicate that WT1 specifically binds to the endogenous Usp18 promoter."

sparser
"Furthermore, direct binding of WT1 to the Usp18 promoter was demonstrated by ChIP assay."

sparser
"Furthermore, to demonstrate WT1 binding to the USP18 promoter in human cells, we used T-REx™ -293 WT1(-KTS) cells in which FLAG-tagged WT1 (-KTS) expression can be induced."

sparser
"While we were able to demonstrate robust binding of WT1 to the Usp18 promoter by ChIP-Seq, this promoter was not identified by a ChIP-chip analysis of chromatin from a later stage of mouse kidney development (E18.5) [ xref ]."
USP18 activates WT1.
| 1
USP18 activates WT1. 1 / 1
| 1

reach
"Taken together our data demonstrate that Usp18 is a transcriptional target of WT1 and suggest that increased expression of USP18 following WT1 loss contributes to Wilms tumorigenesis."
STAT2 affects IFNAR2
| 11
| 10

sparser
"Mapping the STAT2 and USP18 binding to IFNAR2 by cell micropatterning of further deletions and mutations ( xref ) confirmed aa 418-444 of IFNAR2 as a minimal interaction site for STAT2 and USP18."

sparser
"Based on our previous report xref and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

sparser
"Binding of STAT2 and USP18 to IFNAR2 is synergistic, in line with the previous observation that the STAT2-IFNAR2 interaction was strengthened by USP18 xref ."

sparser
"USP18 also interacts with IFNAR2 and STAT2 to block type I interferon signalling in a protease-independent manner."

sparser
"These results established that USP18 independently interacts with IFNAR2 and STAT2."

sparser
"USP18 binds STAT2 and IFNAR2, displacing JAK1 from the cytoplasmic domain of IFNAR2 and inducing a conformational change in the IFN-IFNAR1-IFNAR2 complex, leading to impaired signal transduction (left)."

sparser
"The reported interactions between USP18 and IFNAR2 as well as STAT2 remain to be characterised biochemically and structurally."

sparser
"More detailed analysis of the interaction dynamics of the STAT2IFNAR2 interaction in the presence of USP18 by FRAP ( xref ) revealed a dissociation rate constant of 0.015 ± 0.005 s −1 ."

sparser
"We next examined IFNAR2-independent interaction of STAT2 and USP18 in IFNAR2-deficient U5A cells by using cell micropatterning."

sparser
"Taken together, our data suggest that USP18 simultaneously interacts with IFNAR2 via STAT2 in the membrane distal region and directly in the membrane-proximal region ( xref )."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
IL6 affects USP18
| 1 9
IL6 increases the amount of USP18.
| 7
IL6 increases the amount of USP18. 7 / 8
| 7

reach
"We could also observe an increase at the protein level of the inflammatory genes Serpine1, USP18 and IL1-b cytokine, activated by the inflammasome response (Fig. 2b), and an accumulation of the secreted cytokine IL6 (Fig. 2c)."

reach
"Treatment of Huh7.5 cells and primary murine hepatocytes with LPS and TNF-alpha, but not IL-6 or IL-10, led to upregulated USP18 expression and induced an IFN-alpha refractory state, which was reversed by USP18 knockdown."

reach
"In the present study, treatment of hepatic cells with LPS and TNF-α, but not IL-6 or IL-10, led to upregulated USP18 expression in hepatocytes."

reach
"In the present study, treatment of hepatic cells with LPS and TNF-alpha, but not IL-6 or IL-10, led to upregulated USP18 expression in hepatocytes."

reach
"USP18 mRNA expression was induced by TNF-α and LPS but not by IL-6 or IL-10 (Fig. 1A)."

reach
"Treatment of Huh7.5 cells and primary murine hepatocytes with LPS and TNF-α, but not IL-6 or IL-10, led to upregulated USP18 expression and induced an IFN-α refractory state, which was reversed by USP18 knockdown."

reach
"USP18 mRNA expression was induced by TNF-alpha and LPS but not by IL-6 or IL-10 (XREF_FIG)."
IL6 activates USP18.
| 1 2
IL6 activates USP18. 3 / 3
| 1 2

reach
"The cytokine specificity of our results is also consistent with finding that IL-6 alone is not able to induce USP18 in murine T cells."

reach
"USP18 is induced in hepatocytes by LPS and TNF-alpha but not by IL-6 and IL-10."

eidos
"USP18 is induced in hepatocytes by LPS and TNF - but not by IL-6 and IL-10 ."
IL10 affects USP18
| 1 9
IL10 increases the amount of USP18.
| 8
IL10 increases the amount of USP18. 8 / 9
| 8

reach
"Treatment of Huh7.5 cells and primary murine hepatocytes with LPS and TNF-α, but not IL-6 or IL-10, led to upregulated USP18 expression and induced an IFN-α refractory state, which was reversed by USP18 knockdown."

reach
"In the present study, treatment of hepatic cells with LPS and TNF-alpha, but not IL-6 or IL-10, led to upregulated USP18 expression in hepatocytes."

reach
"In the present study, treatment of hepatic cells with LPS and TNF-α, but not IL-6 or IL-10, led to upregulated USP18 expression in hepatocytes."

reach
"USP18 mRNA expression was induced by TNF-α and LPS but not by IL-6 or IL-10 (Fig. 1A)."

reach
"We examined the ability of inflammatory stimuli, including tumor necrosis factor alpha (TNF-α), lipopolysaccharide (LPS), interleukin-6 (IL-6) and IL-10 to upregulate hepatocyte USP18 expression and blunt the IFN-α response."

reach
"USP18 mRNA expression was induced by TNF-alpha and LPS but not by IL-6 or IL-10 (XREF_FIG)."

reach
"Treatment of Huh7.5 cells and primary murine hepatocytes with LPS and TNF-alpha, but not IL-6 or IL-10, led to upregulated USP18 expression and induced an IFN-alpha refractory state, which was reversed by USP18 knockdown."

reach
"We examined the ability of inflammatory stimuli, including tumor necrosis factor alpha (TNF-alpha), lipopolysaccharide (LPS), interleukin-6 (IL-6) and IL-10 to upregulate hepatocyte USP18 expression and blunt the IFN-alpha response."
IL10 activates USP18.
| 1 1
IL10 activates USP18. 2 / 2
| 1 1

eidos
"USP18 is induced in hepatocytes by LPS and TNF - but not by IL-6 and IL-10 ."

reach
"USP18 is induced in hepatocytes by LPS and TNF-alpha but not by IL-6 and IL-10."
IFNAR2 affects STAT2
| 11
| 10

sparser
"Mapping the STAT2 and USP18 binding to IFNAR2 by cell micropatterning of further deletions and mutations ( xref ) confirmed aa 418-444 of IFNAR2 as a minimal interaction site for STAT2 and USP18."

sparser
"Based on our previous report xref and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

sparser
"Binding of STAT2 and USP18 to IFNAR2 is synergistic, in line with the previous observation that the STAT2-IFNAR2 interaction was strengthened by USP18 xref ."

sparser
"USP18 also interacts with IFNAR2 and STAT2 to block type I interferon signalling in a protease-independent manner."

sparser
"These results established that USP18 independently interacts with IFNAR2 and STAT2."

sparser
"USP18 binds STAT2 and IFNAR2, displacing JAK1 from the cytoplasmic domain of IFNAR2 and inducing a conformational change in the IFN-IFNAR1-IFNAR2 complex, leading to impaired signal transduction (left)."

sparser
"The reported interactions between USP18 and IFNAR2 as well as STAT2 remain to be characterised biochemically and structurally."

sparser
"More detailed analysis of the interaction dynamics of the STAT2IFNAR2 interaction in the presence of USP18 by FRAP ( xref ) revealed a dissociation rate constant of 0.015 ± 0.005 s −1 ."

sparser
"We next examined IFNAR2-independent interaction of STAT2 and USP18 in IFNAR2-deficient U5A cells by using cell micropatterning."

sparser
"Taken together, our data suggest that USP18 simultaneously interacts with IFNAR2 via STAT2 in the membrane distal region and directly in the membrane-proximal region ( xref )."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
BCL2L1 affects USP18
| 4 6
| 4 6

sparser
"The reciprocal immunoprecipitation experiment using anti-USP18 antibody also confirmed the binding of BCL2L1 and USP18 ( Fig. 6 A)."

reach
"In addition, a mitochondrial Co-IP also showed a direct interaction between BCL2L1 and USP18 in Hep3B cells."

reach
"These findings indicated that BCL2L1 was positively regulated by USP18, and the effect of USP18 on the proliferation and apoptosis of HCC cells was achieved by BCL2L1.Since the regulation of USP18 on [MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"

reach
"The reciprocal immunoprecipitation experiment using anti-USP18 antibody also confirmed the binding of BCL2L1 and USP18."

sparser
"These results indicate that the BH3 domain of BCL2L1 is critical for the interaction between USP18 with BCL2L1."

reach
"Mechanistically, we found that USP18 directly bind to BCL2L1 and positively regulated its expression in HCC cells."

sparser
"In addition, a mitochondrial Co-IP also showed a direct interaction between BCL2L1 and USP18 in Hep3B cells ( Fig. 6 D)."

sparser
"Since the regulation of USP18 on BCL2L1, we further evaluated whether USP18 could directly bind BCL2L1 to affect cell-cycle progression."

sparser
"Mechanistically, we found that USP18 directly bind to BCL2L1 and positively regulated its expression in HCC cells."

sparser
"Interestingly, in transfected cells, we found that the deletion of the BH3 domain abrogated the interaction between USP18 with BCL2L1 ( Fig. 6 E)."
USP18 affects KRAS
| 9 1
USP18 activates KRAS.
| 6
USP18 activates KRAS. 5 / 5
| 5

reach
"Since in vitro data revealed USP18 knockdown decreased KRAS protein stability it was sought to learn if Usp18 loss (XREF_SUPPLEMENTARY) affected lung cancer formation in the Kras driven mouse model."

reach
"Using the protein synthesis inhibitor cycloheximide (CHX), USP18 knockdown significantly reduced the half-life of KRAS, but gain of USP18 expression significantly increased its stability."

reach
"Loss of USP18 Reduces Tumorigenicity of Kras driven Lung Cancers in Mice."

reach
"Repression of USP18 not only decreased KRAS protein stability, but also conferred KRAS mislocalization from the plasma membrane to the endomembrane compartment."

reach
"Using the protein synthesis inhibitor cycloheximide, USP18 knockdown significantly reduced the half-life of KRAS, but gain of USP18 expression significantly increased its stability."
USP18 activates mutated KRAS. 1 / 1
| 1

reach
"These findings showed that reduced USP18 levels can antagonize growth of KRAS mutant lung cancers, Yet, destabilization of ISGylated proteins downstream of KRAS might also be responsible for the growth inhibition observed after USP18 loss."
USP18 decreases the amount of KRAS.
| 3
Modified USP18 decreases the amount of KRAS. 2 / 2
| 2

reach
"Restoration of USP18 levels in USP18 repressed cells augmented KRAS expression versus vector controls (XREF_FIG)."

reach
"Interestingly, loss of USP18 reduced KRAS expression, and engineered gain of USP18 expression increased KRAS protein levels in lung cancer cells."
USP18 decreases the amount of KRAS. 1 / 1
| 1

reach
"Interestingly, loss of USP18 reduced KRAS expression and engineered gain of USP18 expression increased KRAS protein levels in lung cancer cells."
USP18 binds KRAS.
| 1
| 1

sparser
"KRAS is Associated with USP18 in Lung Cancer Cell Lines."
USP18 affects IL2
| 1 7
USP18 inhibits IL2.
| 1 3
USP18 inhibits IL2. 4 / 6
| 1 3

eidos
"Taken together , USP18 downregulates IL-2 synthesis and TCR-induced T cell proliferation [ 43 ] ."

reach
"Genetic depletion of USP18 causes NF-κB and NFAT hyperactivation and hyperproduction of IL-2 in T cells [154]."
| PMC

reach
"To understand the molecular mechanisms by which USP18 reduces IL-2 production in T cells, we first examined the activation of TCR proximal signaling events."

reach
"Taken together, USP18 downregulates IL-2 synthesis and TCR induced T cell proliferation [XREF_BIBR]."
USP18 increases the amount of IL2.
| 2
USP18 increases the amount of IL2. 2 / 2
| 2

reach
"In response to T cell receptor engagement, USP18 deficient T cells exhibit hyperactivation of NF-kappaB and NFAT and produce increased levels of IL-2 compared with the wild-type controls."

reach
"In our experiments, we found that USP18 deficient naive CD4 + T cells produced increased amounts of IL-2 compared with the WT counterparts stimulated with anti-CD3 and CD28 or under Th17 polarizing conditions."
USP18 decreases the amount of IL2.
| 2
USP18 decreases the amount of IL2. 2 / 2
| 2

reach
"These data demonstrate that USP18 inhibits IL-2 expression and T cell proliferation in T cells after TCR stimulation as well as under Th17 polarizing conditions."

reach
"Importantly, USP18 is associated with and deubiquitinates the TAK1 and TAB1 complex, thereby restricting expression of IL-2."
USP18 affects IFN receptor
| 1 9
USP18 inhibits IFN receptor.
| 1 6
USP18 inhibits IFN receptor. 7 / 7
| 1 6

reach
"A majority of these genes are responsible for the regulation and control of early innate inflammation, such as USP18, which disrupts the JAK-STAT pathway downstream of the IFN receptor (43), and TIFAB, which inhibits the activation of the NF-κB pathway (44)."

reach
"On the other hand, the deubiquitinating enzyme USP18 can also directly inhibit type I IFN receptor signaling, thereby suppressing the immune response (Arimoto et al., 2017)."

eidos
"USP18 regulates antiviral responses by removing ISG15 conjugates and can directly inhibit type I IFN receptor signaling by binding the subunit 2 of the receptor via STAT-2 [ 27 , 28 ] ."

reach
"Whereas ISG15 conjugation has been widely recognized to act antivirally 13, unconjugated ISG15 serves a proviral role by promoting USP18 mediated suppression of type I IFN receptor (IFNAR) signaling XREF_BIBR, XREF_BIBR, XREF_BIBR; this latter function of ISG15 is responsible for over-amplified ISG induction and fortified viral resistance in humans with inherited ISG15 deficiency."

reach
"USP18 regulates antiviral responses by removing ISG15 conjugates and can directly inhibit type I IFN receptor signaling by binding the subunit 2 of the receptor via STAT-2 XREF_BIBR, XREF_BIBR."

reach
"Whereas ISG15 conjugation has been widely recognized to act antivirally13, unconjugated ISG15 serves a proviral role by promoting USP18 mediated suppression of type I IFN receptor (IFNAR) signaling14, 15, 16; this latter function of ISG15 is responsible for over-amplified ISG induction and fortified viral resistance in humans with inherited ISG15 deficiency."

reach
"A majority of these genes are responsible for the regulation and control of early innate inflammation, such as USP18, which disrupts the JAK-STAT pathway downstream of the IFN receptor (43) , and TIFAB, which inhibits the activation of the NF-k B pathway (44) ."
USP18 binds IFN receptor.
| 2
USP18 binds IFN receptor. 2 / 2
| 2

reach
"To exert its function as a negative regulator, USP18 binds to the IFN receptor and JAK complex and attenuates the magnitude of the response."

reach
"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling, we investigated a potential interaction of Usp18 with the IFN-lambda specific receptor subunit IL-28R1."
USP18 activates IFN receptor.
| 1
USP18 activates IFN receptor. 1 / 1
| 1

reach
"More likely, however, these cells contain high levels of factors that inhibit type I but not type III IFN receptor signaling such as USP18, SOCS1 and SOCS3."
IFNB1 affects USP18
| 8
IFNB1 increases the amount of USP18.
| 4
IFNB1 increases the amount of USP18. 4 / 5
| 4

reach
"Finally, AA homozygosis for the intronic polymorphism rs2542109 was associated with the responder phenotype; however, USP18 expression levels induced by IFNbeta did not differ amongst MS patients carrying different rs2542109 genotypes."

reach
"XREF_BIBR, XREF_BIBR MS. IFN-beta is considered the first line of therapy against MS. XREF_BIBR, XREF_BIBR IFN-beta can induce USP18 expression through IFNAR."

reach
"77,78 IFN-β can induce USP18 expression through IFNAR."

reach
"On the other hand, the upregulation of USP18 inhibits beta cell apoptosis.75, 76IFN-β is considered the first line of therapy against MS.77, 78 IFN-β can induce USP18 expression through IFNAR."
IFNB1 activates USP18.
| 4
IFNB1 activates USP18. 4 / 5
| 4

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"16 USP18 is induced by IFN-β not only in lymphocytes but also in HO-1 human melanoma cells, 6 in Huh-7.5 cells treated with irrelevant small-interfering RNAs, 17 in the choroid plexus and in ependymal cells."

reach
"16 USP18 is induced by IFN-beta not only in lymphocytes but also in HO-1 human melanoma cells, 6 in Huh-7.5 cells treated with irrelevant small interfering RNAs, 17 in the choroid plexus and in ependymal cells."

reach
"A previous study showed that USP18 is induced by IFN-beta in HO-1 human melanoma cells XREF_BIBR."

reach
"In contrast, Li et al. (2000) demonstrate that ISG43 (HuUBP43) is induced maximally by IFN-beta, in 2fTGH cells, whereas IFN-gamma (200 U/ml) is a better inducer of this gene than IFN-alpha (500 U/ml)[MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"
IFNAR2 affects STAT2, and USP18
| 10
| 10

sparser
"Mapping the STAT2 and USP18 binding to IFNAR2 by cell micropatterning of further deletions and mutations ( xref ) confirmed aa 418-444 of IFNAR2 as a minimal interaction site for STAT2 and USP18."

sparser
"Based on our previous report xref and the results presented above, USP18 interacts with both IFNAR2 and STAT2."

sparser
"Binding of STAT2 and USP18 to IFNAR2 is synergistic, in line with the previous observation that the STAT2-IFNAR2 interaction was strengthened by USP18 xref ."

sparser
"USP18 also interacts with IFNAR2 and STAT2 to block type I interferon signalling in a protease-independent manner."

sparser
"These results established that USP18 independently interacts with IFNAR2 and STAT2."

sparser
"USP18 binds STAT2 and IFNAR2, displacing JAK1 from the cytoplasmic domain of IFNAR2 and inducing a conformational change in the IFN-IFNAR1-IFNAR2 complex, leading to impaired signal transduction (left)."

sparser
"The reported interactions between USP18 and IFNAR2 as well as STAT2 remain to be characterised biochemically and structurally."

sparser
"More detailed analysis of the interaction dynamics of the STAT2IFNAR2 interaction in the presence of USP18 by FRAP ( xref ) revealed a dissociation rate constant of 0.015 ± 0.005 s −1 ."

sparser
"We next examined IFNAR2-independent interaction of STAT2 and USP18 in IFNAR2-deficient U5A cells by using cell micropatterning."

sparser
"Taken together, our data suggest that USP18 simultaneously interacts with IFNAR2 via STAT2 in the membrane distal region and directly in the membrane-proximal region ( xref )."
USP18 affects signaling
| 9
USP18 inhibits signaling.
| 7
USP18 inhibits signaling. 7 / 7
| 7

sparser
"USP18 inhibits IFN-α/β signaling, and its decrease is consistent with the higher levels of ISG expression in the patient’s blood ( xref )."

sparser
"USP18 inhibits NF-κB signaling at the level of the IKK complex."

sparser
"These findings highlight the importance of studying whether USP18 has additional functional domain(s) and whether USP18 can inhibit TNF-α signaling by itself or in combination with other protein(s)."

sparser
"We hypothesized that USP18 may also prevent the phosphorylation of JAK1 after IFN-γR signaling, similarly to how USP18 inhibits IFNAR2 signaling."

sparser
"Splenic CD169+ macrophages selectively express the ubiquitin-specific protease Usp18 which inhibits interferon αβ receptor (IFNAR) signaling ( xref )."

sparser
"Given that Usp18 inhibits IFN-I signaling, it will be important to further understand why increases in Usp18 expression do not correlate with a corresponding decrease in IFN-I stimulated gene expression."

sparser
"To determine the molecular mechanisms by which USP18 inhibits TLR induced NF-κB signaling, we transfected 293T cells with MyD88, TRAF2, TRAF6, TAK1-TAB1, IKKα, IKKβ, or p65 subunit together with increasing amounts of USP18 plus the NF-κB luciferase reporter."
USP18 activates signaling.
| 2
USP18 activates signaling. 2 / 2
| 2

sparser
"These results collectively suggested that silencing USP18 activated IFN-α signaling, JAK/STAT signaling, in a prolonged fashion."

sparser
"In contrast, silencing USP18 activates the Jak/STAT signaling and potentiates IFN anti-HCV ativity [ xref ]."
USP18 affects IKBKB
2 | 4 3
USP18 binds IKBKB.
2 | 2 2
2 | 2 2

reach
"To test this prediction, we transfected 293T cells with USP18 together with IKKalpha, IKKbeta, or NEMO expression plasmids and co-immunoprecipitation and immunoblot analysis revealed that USP18 interacted with IKKalpha, IKKbeta, and NEMO (XREF_FIG)."

sparser
"To determine the mechanism of the USP18 and IKKβ interaction, we generated deletion mutants encompassing the amino-terminal kinase domain (KD), leucine zipper domain (LZ), and a C-terminal helix-loop-helix (HLH) domain of IKKβ ( xref ), and performed immunoprecipitation to test their ability to interact with USP18."

sparser
"Similar to full-length IKKβ, all mutated domains could interact with USP18 ( xref ), suggesting that IKKβ may not be the direct target of USP18."

No evidence text available

reach
"To determine the mechanism of the USP18 and IKKbeta interaction, we generated deletion mutants encompassing the amino-terminal kinase domain (KD), leucine zipper domain (LZ), and a C-terminal helix-loop-helix (HLH) domain of IKKbeta (XREF_FIG), and performed immunoprecipitation to test their ability to interact with USP18."

No evidence text available
USP18 inhibits IKBKB.
| 2 1
USP18 inhibits IKBKB. 3 / 3
| 2 1

sparser
"We found that the activation of NF-κB by MyD88, TRAF2, TRAF6, TAK1-TAB1, IKKα and IKKβ was markedly inhibited by USP18 ( xref )."

reach
"They show that three USPs -- USP14, USP18, and USP22 -- fulfilled these criteria, but focused on USP14, as USP18 and USP22 could also inhibit IKKbeta activation directly in the absence of NLRC5."

reach
"Importantly, we observed that USP18 and USP22, but not USP14, may directly inhibit IKK-beta activation through an NLRC5 independent mechanism."
USP18 affects IFN-I
| 9
USP18 inhibits IFN-I.
| 7
USP18 inhibits IFN-I. 5 / 5
| 5

reach
"Given that Usp18 inhibits IFN-I signaling, it will be important to further understand why increases in Usp18 expression do not correlate with a corresponding decrease in IFN-I stimulated gene expression."

reach
"Therefore enhanced activity of Usp18 in beta islet cells would limit IFN-I signaling in these cells and could prevent diabetes during exposure to IFN-I XREF_BIBR."

reach
"Following exposure to IFN-I, metallophilic macrophages induce expression of the Usp18 protein which prevents Jak1 phosphorylation and inhibits IFN-I signaling in these cells."

reach
"The mechanism by which MARCH1 regulates IFN-I remains obscure and several factors may include increased expression of genes encoding SOCS1, SOCS3, SIKE1, CACTIN, TRIM24, IL-10RA, USP18, and mir-21 that are known to suppress IFN-I responses and changes in DCs, Macs, and other cell populations can may also affect the levels of proteins critical for IFN-I production."

reach
"During systemic infection with the vesicular stomatitis virus (VSV), CD169 + macrophages of the splenic marginal zone and the lymph node sinusoid can express the endogenous IFN-I blocker Usp18, thereby promoting virus replication and enhancing the antiviral immune response [XREF_BIBR, XREF_BIBR]."
| PMC
Modified USP18 inhibits IFN-I. 2 / 2
| 2

reach
"Following exposure to IFN-I, metallophilic macrophages induce expression of the Usp18 protein which prevents Jak1 phosphorylation and inhibits IFN-I signaling in these cells."

reach
"Metallophilic macrophages have been demonstrated to induce expression of the Usp18 protein which prevents Jak1 phosphorylation and inhibits IFN-I signaling in these cells."
USP18 activates IFN-I.
| 2
USP18 activates IFN-I. 2 / 2
| 2

reach
"Among the DUBs that interact with STING, five members, namely CYLD, OTUD5, USP18 (also termed UBP43), USP20, and USP44, have been demonstrated to promote IFN-I production and antiviral responses."

reach
"11 Moreover, infection with S. typhimurium enhances IFN-I signaling and inflammatory response in Usp18 lty9 mice."
TAB1 affects USP18
2 | 4 2
2 | 4 1

reach
"We also found that USP18 weakly interacts with TAB1 alone (XREF_FIG), but it has higher affinity for the TAK1 and TAB1 complex in the presence of TAK1 (XREF_FIG)."

No evidence text available

reach
"However, USP18 binds to TAB1 and inhibits the ubiquitination of the TAB1 and TAK1 complex."

sparser
"We also found that USP18 weakly interacts with TAB1 alone ( xref ), but it has higher affinity for the TAK1-TAB1 complex in the presence of TAK1 ( xref )."

No evidence text available

reach
"In overexpression and co-immunoprecipitation assays, USP18 interacted with TAB1 and CARMA1 but not with NEMO constitutively (XREF_FIG and not depicted)."

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
STING1 affects USP18
2 | 1 6
2 | 1 2

No evidence text available

reach
"Zhang et al. studied the effect of USP18 (also known as UBP43) on STING and revealed that USP18 interacts with STING to affect IFN-promotor activity [XREF_BIBR]."

sparser
"Zhang et al. studied the effect of USP18 (also known as UBP43) on STING and revealed that USP18 interacts with STING to affect IFN-promotor activity [ xref ]."

sparser
"Zhang et al. studied the effect of USP18 (also known as UBP43) on STING and revealed that USP18 interacts with STING to affect IFN-promotor activity [41]."

No evidence text available
| 4

sparser
"Our above results demonstrated that (1) USP18 and USP20 correlate with limited oHSV-1 T1012G virus yields in SCC9 cells; (2) USP18 and USP20 interact with STING and alter the levels of STING proteins in SCC9 cells; and (3) altered STING accumulation regulates viral replication in SCC9 and SCC25 cells, while we need to further examine whether the DUB activity of USP18 or USP20 is crucial for the regulation of STING stabilization and oHSV-1 T1012G virus replication."

sparser
"Collectively, these results showed that USP18 and USP20 interact with STING and that a deficiency of either USP18 or USP20 affects the stability of STING in SCC9 cells."

sparser
"Immunoprecipitation revealed that both USP18 and USP20 interacted with the N-terminal region of the STING protein."

sparser
"We found that USP18 and USP20 both interact with STING in SCC9 cells."
IFNG affects USP18
| 9
IFNG activates USP18.
| 5
IFNG activates USP18. 5 / 5
| 5

reach
"2 In addition, USP18 has been found to inhibit TRAIL-induced apoptosis independently of the deISGylation pathway.91 Furthermore, the depletion of USP18 leads to a strong increase in the levels and activity of miR-7, and this activity in turn decreases the expression of EGFR, leading to apoptosis and control of cancer cells.92Hong et al.93 found that IFN-γ can induce USP18 in tumor cells and that this protein plays an important role in inhibiting tumorigenesis and maintaining antitumor immunity."

reach
"92 Hong et al. 93 found that IFN-gamma can induce USP18 in tumor cells and that this protein plays an important role in inhibiting tumorigenesis and maintaining antitumor immunity."

reach
"The novel finding in this study is the discovery that the ubiquitin specific peptidase USP18 can be induced by IFN-gamma in tumor cells and plays important roles in inhibiting tumorigenesis and antitumor immunity."

reach
"92 Hong et al. 93 found that IFN-γ can induce USP18 in tumor cells and that this protein plays an important role in inhibiting tumorigenesis and maintaining antitumor immunity."

reach
"The low-level induction of USP18 by IFN-gamma was not sufficient to attenuate (peg) IFN-alpha-mediated signaling."
IFNG increases the amount of USP18.
| 4
IFNG increases the amount of USP18. 4 / 4
| 4

reach
"IFN-gamma signaling induces USP18 expression in tumor cells during immunosurveillance."

reach
"In this report, we investigated the function of USP18 in IFN-gamma signaling in B16 melanoma cells in vitro and in vivo and found that IFN-gamma or CTLs activated USP18 expression in tumor cells."

reach
"USP18 expression in tumor cells, such as human sarcoma 2fTGH cells, is not only induced by IFNgamma timulation [XREF_BIBR]."

reach
"In conclusion, we found that IFN-gamma signaling induces intrinsic expression of USP18 in tumor cells that not only affects tumorigenesis, but also may be useful in regulating immunotherapy efficacy."
| 5

reach
"Further investigation with the KEGG pathway enrichment analysis showed those up-regulated genes could cause the activation of the IFN-induced pathway, type II interferon signaling pathway, and regulation of protein ISGylation by the ISG15 deconjugating enzyme USP18 pathway (Figure 4B)."

reach
"211, 214 ISG15, together with its conjugation E3 ligase (CEB1) and its deconjugation enzyme USP18, are in the same ISG15/USP18 UBL pathway.ISGylation modulates signal transduction pathways and host antiviral responses."

reach
"Ye et al. (2021) demonstrated that DENV-2 infection increased USP18 expression; USP18 overexpression enhanced DENV-2 replication, while USP18 silencing inhibited DENV-2 replication by activating the IFN-α-mediated JAK/STAT signaling pathway."

reach
"Suppressive pathways include IFN-I activation of USP18, an ISG that suppresses signal transduction by reducing the ability of IFN-Is to form an active receptor complex (38, 48)."

reach
"USP18 contributes to the proliferation and migration of ovarian cancer cells by regulating the AKT/mTOR signaling pathway."
| 3

reach
"The non-covalent interactions of ISG15 and USP18 prevent the ubiquitination of USP18 by S-phase kinaseassociated protein two and stabilize the downregulation of the IFN signaling pathway by USP18 (Tokarz et al., 2004; Zhang et al., 2015) ."

reach
"Interestingly, USP18 has been shown to negatively regulate the type I IFN signalling pathway, and its deficiency results in enhanced and prolonged STAT1 phosphorylation XREF_BIBR - XREF_BIBR."

reach
"USP18 can interact with IFNAR2 and STAT2, competing with JAK1 for receptor binding and thus inhibiting signal transduction."
USP18 affects cell cycle
| 1 7
USP18 activates cell cycle.
| 1 5
| 1 5

reach
"Consistently, the loss of c-Myc reversed the cell cycle arrest and apoptosis induced by USP18 overexpression in SW1990 cells (XREF_FIG - XREF_FIG)."

reach
"Overall, these results suggested that USP18 promotes pancreatic cancer cell proliferation by facilitating cell cycle progression and inhibiting cell apoptosis."

eidos
"Moreover , flow cytometry showed that downregulation of USP18 significantly arrested the cell cycle in G1 phase in pancreatic cancer cells ."

reach
"Moreover, our experimental data revealed that USP18 silencing obviously blocked cell cycle at G1 phase and increased cell apoptosis."

reach
"Cell cycle analysis showed that USP18 silencing caused a considerable inhibition of cell cycle progression, leading to a selective accumulation of cells in the G1 phase compared with control groups in[MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"

reach
"USP18 promotes PC cell growth by facilitating cell cycle progression."
USP18 inhibits cell cycle.
| 2
| 2

reach
"Moreover, flow cytometry showed that downregulation of USP18 significantly arrested the cell cycle in G1 phase in pancreatic cancer cells."

reach
"In present study, our data indicated that knockdown of USP18 could inhibit cell proliferation and induce cell cycle arrest in the G1 phase in HCC cells."
USP18 affects SGCG
| 8
USP18 inhibits SGCG.
| 5
USP18 inhibits SGCG. 5 / 5
| 5

reach
"Indeed, IRF1 uniquely promotes the transcription of the negative regulator USP18 (Forero et al., 2019), which selectively inhibits type I IFN signaling without affecting IFN-λ signaling (Blumer et al., 2017)."

reach
"USP18 also interacts with IFNAR2 and STAT2 to block type I interferon signalling in a protease-independent manner."

reach
"In addition to its isopeptidase activity, USP18 negatively regulates type I and type III IFN signalling by blocking the IFNAR2 subunit of the interferon receptor 184 ."

reach
"CRISPR/Cas9 knockout of USP18 enhances type I IFN responsiveness and restricts HIV-1 infection in macrophages.The IFN-stimulated gene ubiquitin-specific proteinase 18 (USP18) encodes a protein that negatively regulates T1 IFN signaling via stearic inhibition of JAK1 recruitment to the IFN-receptor 2 subunit (IFNAR2)."

reach
"Recent data by Zhang and coworkers (Malakhova et al., 2006) revealed, however, that USP18 attenuates JAK-STAT signaling, and thereby the type 1 IFN response, in a non-enzymatic manner, i.e., by directly competing with JAK1 for binding to the IFNAR2 subunit of the type 1 IFN receptor."
USP18 activates SGCG.
| 3
USP18 activates SGCG. 3 / 3
| 3

reach
"CRISPR/Cas9 knockout of USP18 enhances type I IFN responsiveness and restricts HIV‐1 infection in macrophages.It is well established that type I IFNs (T1 IFNs) can restrict acute HIV‐1 infection in vitro.1, 2, 3, 4, 5 In clinical trials treating human patients with recombinant IFN‐α2a, T1 IFNs can suppress viral replication in the absence of antiretroviral therapy (ART) in some patients.6, 7 However, this approach failed in long‐term treatment when study subjects became refractory to IFN treatment and viral loads returned to previous levels."

reach
"The impact of HIRI on LCMV replication (see Fig. 6A and B) was evaluated by one-way analysis of variance with the Tukey's post hoc test.We have previously shown that USP18 can modulate the type 1 IFN response (14)."

reach
"ISG15 has also been shown to regulate type I interferon signalling by stabilizing USP18 (ref.4) and by interacting with leucine-rich repeat-containing protein 25 (LRRC25) to mediate the autophagic degradation of retinoic acid-inducible gene I protein (RIG-I; also known as DDX58)41."
| 2 6
| 2 4

reach
"USP18 promotes tumor metastasis in esophageal squamous cell carcinomas via deubiquitinating ZEB1."

reach
"USP18 knock-down reduced lung cancer growth, wound-healing, migration, and invasion versus controls (P < .001) and markedly decreased murine lung cancer metastases (P < .001)."

eidos
"USP18 promotes tumor metastasis in esophageal squamous cell carcinomas via deubiquitinating ZEB1 ."

eidos
"In functional experiments , USP18 knockdown significantly inhibited ESCC invasion and metastasis in vitro ."

reach
"This study explores if the loss of USP18 reduced lung cancer metastasis."

reach
"In functional experiments, USP18 knockdown significantly inhibited ESCC invasion and metastasis in vitro."
| 2

reach
"Loss of ubiquitin-specific peptidase 18 destabilizes 14-3-3ζ protein and represses lung cancer metastasis."

reach
"Interestingly, lack of Usp18 reduced the incidence of lung metastasis in PyVmT mice (XREF_FIG) that could be related to a decrease in invasiveness of cancer cells observed in in vitro matrigel invasion assays (XREF_FIG)."
USP18 affects IFNAR1
| 1 5 2
USP18 inhibits IFNAR1.
| 1 5
USP18 inhibits IFNAR1. 6 / 6
| 1 5

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"Lacking of USP18 leads to an increase signaling of IFN-I, IFN-III, TNF-α and high levels of conjugated ISG15Figure 3: Role of USP18-dependent enforced viral replication in activation of the adaptive immune system and onset of diabetes mellitus type I. (a) USP18 inhibits IFNAR signaling, which leads to enforced viral replication in CD169+ macrophages."

reach
"For example, USP18 is known to prevent IFNAR activation as shown by Honke et al. where USP-18 secreting CD169+ macrophages displayed a lower type I IFN sensitivity upon viral infection [38], [57]."

reach
"For example, USP18 is known to prevent IFNAR activation as shown by Honke et al. where USP-18 secreting CD169 macrophages displayed a lower type I IFN sensitivity upon viral infection [38], [57].4 Strategies to control innate immune activation upon conventional and self-amplifying mRNA delivery."

reach
"For example, USP18 is known to prevent IFNAR activation as shown by Honke et al. where USP-18 secreting CD169 + macrophages displayed a lower type I IFN sensitivity upon viral infection [38, 57] .4."

eidos
"For example , USP18 is known to prevent IFNAR activation as shown by Honke et al. where USP-18 secreting CD169 + macrophages displayed a lower type I IFN sensitivity upon viral infection [ 38 ] , [ 57 ] ."

reach
"Th17 cells are widely Figure 3 Role of USP18-dependent enforced viral replication in activation of the adaptive immune system and onset of diabetes mellitus type I. (a) USP18 inhibits IFNAR signaling, which leads to enforced viral replication in CD169 + macrophages."
USP18 binds IFNAR1.
| 2
| 2

sparser
"Their study showed that USP18 does not interact with IFNAR1, but with Box1-Box2 region of IFNAR2 to disrupt its interaction with JAK to inhibit JAK’s tyrosine kinase activity in a DUB activity independent manner [ xref ]."

sparser
"Their study showed that USP18 does not interact with IFNAR1, but with Box1-Box2 region of IFNAR2 to disrupt its interaction with JAK to inhibit JAK’s tyrosine kinase activity in a DUB activity independent manner [44]."
IFNL4 affects USP18
| 8
IFNL4 increases the amount of USP18.
| 3
IFNL4 increases the amount of USP18. 3 / 3
| 3

reach
"We suspect that whereas increased TNF-alpha does contribute to USP18 expression, there are other stimuli, for example, LPS and perhaps the recently described interferon-lambda 4, that also modulate hepatic USP18 expression."

reach
"In hepatoma cells, IFNL4 gene transfection or recombinant IFN-lambda4 protein treatment robustly increased the protein levels of ISG15 and USP18 in an IFNLR1 dependent manner and potently blocked IFN-alpha signalling."

reach
"We suspect that whereas increased TNF-α does contribute to USP18 expression, there are other stimuli, for example, LPS and perhaps the recently described interferon-lambda 4 (56), that also modulate hepatic USP18 expression."
IFNL4 decreases the amount of USP18.
| 3
IFNL4 decreases the amount of USP18. 3 / 3
| 3

reach
"In conclusion, these data indicate that IFN-lambda4 attenuates the response of HCV genotype 1b to IFN-alpha therapy and inhibits the JAK-STAT signalling pathway by inducing USP18 expression."

reach
"These results demonstrate that virus induced IFN-lambda4 potently blocks IFN-alpha signalling by inducing high protein levels of ISG15 and USP18."

reach
"Recently, Fan et al. also demonstrated that IFN-lambda4 inhibits the JAK-STAT signalling pathway by inducing USP18 expression 28."
IFNL4 activates USP18.
| 2
IFNL4 activates USP18. 2 / 2
| 2

reach
"IFN-alpha unresponsiveness depends on ISG15 and USP18 in cells that overexpress IFN-lambda4 or treated with IFN-lambda4."

reach
"Microarray analysis revealed that IFN-lambda4 could induce ubiquitin specific peptidase 18 (USP18), a known inhibitor of the type I IFN signalling pathway, in a more sustained pattern compared with type I interferon induction."

reach
"USP18 reduced basal inflammation, senescence and insulin resistance in coronary endothelial cells."

reach
"From the transcriptomic analysis we selected USP18, previously shown to decrease inflammation and insulin-resistance."

reach
"USP18 silencing enhanced basal inflammation and senescence."

reach
"A partial form of inherited human USP18 deficiency underlies infection and inflammation."

eidos
"The upregulation of USP18 ameliorated hind limbs ' motor function , inhibiting inflammation and apoptosis after SCII in rats ."

reach
"Our findings indicate that USP18 inhibition induces inflammation by increasing the STAT signaling and exacerbates IFN induced beta cell apoptosis by the mitochondrial pathway of cell death."
USP18 affects activation
| 7
USP18 inhibits activation. 7 / 7
| 7

sparser
"Regardless of its enzymatic activity, UBP43 directly interacts with the IFNAR2 subunit of the IFN-α/β receptor such that UBP43 inhibits the activation of receptor-associated JAK1 by blocking the interaction between JAK1 and IFNAR2 [ xref ]."

sparser
"Likewise, USP18 and TRIM5α inhibited NFAT1 activation."

sparser
"Luciferase assay showed that both human and mouse USP18 markedly inhibited MyD88-mediated NF-κB-luc activation, suggesting a conserved biological function in regulating the NF-κB signaling pathway ( xref )."

sparser
"More importantly, USP18 only inhibited NF-κB activation in WT NEMO or NEMO (K285/309R) construct, but had no effect on NEMO (K325/326R) construct ( xref )."

sparser
"Taken together, these results suggest that USP18 inhibits TLR-induced NF-κB activation by blocking the degradation of IκBα as well as by blocking the nuclear accumulation of p65."

sparser
"In contrast, USP18 did not inhibit p65-mediated NF-κB activation ( xref ), suggesting that USP18 inhibits the NF-κB pathway upstream of p65, most likely targeting the IKK complex."

sparser
"Moreover, USP18 competitively inhibits IFN-α/β-induced JAK/STAT activation [ xref ] and upregulates epidermal growth factor receptor (EGFR) expression [ xref ]."
USP18 affects PTEN
| 7
USP18 inhibits PTEN.
| 3
USP18 inhibits PTEN. 2 / 2
| 2

reach
"It was therefore not surprising that repression of USP18 augmented PTEN cytoplasmic destabilization."

reach
"Data displayed here indicate that loss of USP18 induced destabilization of PTEN protein in the cytoplasm."
Modified USP18 inhibits PTEN. 1 / 1
| 1

reach
"This finding established that loss of USP18 expression reduced cellular PTEN levels and promoted destabilization of cytosolic PTEN [XREF_BIBR, XREF_BIBR]."
USP18 activates PTEN.
| 2
USP18 activates PTEN. 2 / 2
| 2

reach
"Interestingly, repression of USP18 decreased cytoplasmic PTEN relative to nuclear PTEN protein levels."

reach
"However, USP18 overexpression could stabilize PTEN protein, and USP18 repression decreases mainly cytoplasmic PTEN [XREF_BIBR]."
USP18 increases the amount of PTEN.
| 1
Modified USP18 increases the amount of PTEN. 1 / 1
| 1

reach
"This finding established that loss of USP18 expression reduced cellular PTEN levels and promoted destabilization of cytosolic PTEN [XREF_BIBR, XREF_BIBR]."
USP18 decreases the amount of PTEN.
| 1
Modified USP18 decreases the amount of PTEN. 1 / 1
| 1

reach
"Restoration of USP18 levels in USP18 repressed cells rescued PTEN expression as compared to vector transfected controls."

reach
"Functionally, decreased USP18 expression attenuated GBM cell invasion and migration through repressing EMT."

reach
"USP18 knock-down reduced lung cancer growth, wound-healing, migration, and invasion versus controls (P < .001) and markedly decreased murine lung cancer metastases (P < .001)."

reach
"Furthermore, cell apoptosis was promoted by USP18 silencing, and interference of USP18 suppressed cell migration and invasion."

reach
"Lack of Usp18 inhibits angiogenesis and reduces invasiveness of mammary epithelial tumour cells."
| 1 2

eidos
"In functional experiments , USP18 knockdown significantly inhibited ESCC invasion and metastasis in vitro ."

reach
"In functional experiments, USP18 knockdown significantly inhibited ESCC invasion and metastasis in vitro."

reach
"At necropsy 6 weeks post-infection, Usp18 Ity9 mutant mice showed large infected foci with extensive necrotic centre and increased lymphohistiocytic inflammatory cell infiltration in the lung compared to littermate control mice with a greater percentage of the lung affected by inflammation (XREF_SUPPLEMENTARY, left and middle panels)."
USP18 affects Infections
| 7
USP18 inhibits Infections.
| 4
| 4

reach
"A partial form of inherited human USP18 deficiency underlies infection and inflammation."

reach
"Therefore, these results suggested that inhibiting the expression of IFIT3, OASL, USP18, XAF1, IFI27, and EPSTI1 may reduce the risk of SARS‐CoV‐2 infection and may also have a positive effect on antiviral therapy in patients with SARS‐CoV‐2 infection.In conclusion, this study comprehensively analyzed the blood leukocytes gene expression profile data of COVID‐19 patients by using bioinformatics methods and provided a preliminary understanding of the functions and mechanisms of DEGs in the leukocytes of COVID‐19 patients."

reach
"Therefore, these results suggested that inhibiting the expression of IFIT3, OASL, USP18, XAF1, IFI27, and EPSTI1 may reduce the risk of SARS-CoV-2 infection and may also have a positive effect on antiviral therapy in patients with SARS-CoV-2 infection.and 4G)."

reach
"This will also induce the expression of USP18, an inhibitor of the IFN signaling pathway, leading to an impaired antiviral state and to an increased propensity to develop chronic infection."
USP18 activates Infections.
| 3
| 3

reach
"Knockout of USP18 abrogated significantly the infection of HIV-1 by more than 6-folds, which correlated strongly with reduced phosphorylated SAMHD1.USP18 blocked the interferon-induced signalling in the THP-1 cells measured by ISG induction by real time PCR."
| PMC

reach
"We speculate that by blocking IFN-α signaling, USP18 expression may lead to an enhanced susceptibility to infection with interferon-sensitive viruses and enhanced viral proliferation."

reach
"We found that USP18 increased HIV-1 infection by more than 40-fold and HIV-2Δvpx by over 7-fold."
| PMC
USP18 affects ISG
| 7
USP18 increases the amount of ISG.
| 5
USP18 increases the amount of ISG. 5 / 5
| 5

reach
"Since USP18 −/− iMacs also had increased STAT1 and STAT2 signaling, we wanted to determine if USP18 −/− iMacs also had enhanced ISG expression after IFN-treatment."

reach
"However, infection did interfere with the ISG regulatory IRF-STAT1 and STAT2 pathways to inhibit IFNT induced ISG expression including ISG15, HERC5, USP18 (involved in protein modification via ISGylation), DDX58, IFIH1 (cytosolic detection of viral RNA) and IFIT3, MX2, RSAD2, and SAMD9 (immune regulators with antiviral activity) XREF_BIBR."

reach
"Since USP18−/− iMacs also had increased STAT1 and STAT2 signaling, we wanted to determine if USP18−/− iMacs also had enhanced ISG expression after IFN‐β treatment."

reach
"However, infection did interfere with the ISG regulatory IRF-STAT1 and STAT2 pathways to inhibit IFNT-induced ISG expression including ISG15, HERC5, USP18 (involved in protein modification via ISGylation), DDX58, IFIH1 (cytosolic detection of viral RNA) and IFIT3, MX2, RSAD2, and SAMD9 (immune regulators with antiviral activity) [41]."

reach
"By providing exogenous IFN-, we were able to demonstrate that lack of USP18 makes cells more sensitive to the effects of IFN.F I G U R E 7 USP18 −/− iMacs have enhanced STAT phosphorylation and enhanced ISG expression."
USP18 decreases the amount of ISG.
| 2
USP18 decreases the amount of ISG. 2 / 2
| 2

reach
"We found that knockdown of both ISG15 and USP18 upregulated ISG expression and exerted opposite effects on CSFV."

reach
"Silencing of USP18 by siRNA was later shown to prolong STAT1 phosphorylation and enhance ISG expression, resulting in a synergistic antiviral effect on HCV treated with IFN [XREF_BIBR]."
USP18 affects CD8
| 7
USP18 inhibits CD8.
| 4
USP18 inhibits CD8. 4 / 4
| 4

reach
"In conclusion, lack of Usp18 in CD11c + cells reduced priming of islet specific CD8 + T cells and prevented induction of diabetes."

reach
"We found here that lack of Usp18 in dendritic cells prevented enforced virus replication and would therefore limit induction of autoreactive CD8 + T cells, but also induction of IFN-I production."

reach
"Furthermore, in comparison to control mice, the frequency of conventional CD11b + DCs in the spleen of Usp18 -/- mice was reduced by about 50% (XREF_FIG), however, the conventional CD8 + DCs (XREF_FIG) and pDCs (CD11c int B220 + CD11b -) (data not shown) populations were observed with the same frequency in the spleens of both Usp18 -/- and control mice."

reach
"The absence of Usp18 limited the expansion of virus specific CD8 + T cells (XREF_FIG) and reduced IFN-gamma production by CD8 + T cells (XREF_FIG) and CD4 + T cells (XREF_FIG)."
USP18 activates CD8.
| 3
USP18 activates CD8. 3 / 3
| 3

reach
"This finding suggests that, in the presence of virus specific antibodies, Usp18 is necessary for viral replication in marginal zone macrophages and also enhances the priming of virus specific CD8 + T cells."

reach
"(b) In case of enforced viral replication in dendritic cells of a virus resembling an autoantigen, autoreactive CD8 + T cells will be primed, which leads to autoimmune diseases such as type I diabetes, whereas USP18 deficiency reduces the priming of autoreactive CD8 + T cells and onset of autoimmune diabetes owing to inhibition of enforced viral replication Functions of USP18 N Honke et al recognized as essential player for the development of MS."

reach
"Therefore we would suggest that Usp18 expression in dendritic cells could drive autoimmune diabetes by promoting activation of cross-reactive CD8 + T cells, but also by induction of high levels of IFN-I."
SGCG affects USP18
| 7
SGCG activates USP18.
| 5
SGCG activates USP18. 5 / 5
| 5

reach
"Firstly, like ISG15 itself, the predominant ISG15 conjugation and deconjugation enzymes UbE1L, UbcH8/UbcM8, HERC5/HERC6, and UBP43/USP18 are all induced by type I IFN stimulation."

reach
"Further temporal regulation of the ISG15 system by expression of the type I IFN-induced cellular deconjugase (human Usp18/mouse Ubp43), as well the role of free intracellular ISG15 in downregulating signaling at the type I IFN receptor in human cells, remains to be explored.We have shown that ISG15 is secreted from both lymphocytes and epithelial cells, suggesting that the ISG15 secretion mechanism is operational in a wide range of cell types."
| PMC

reach
"b | Intracellular functions: Ubl carboxy-terminal hydrolase 18 (USP18) and S-phase kinase-associated protein 2 (SKP2): USP18, which is induced by type I interferons, mediates the negative feedback regulation of interferon signalling independent of its deISGylase activity."

reach
"19 The Usp18 gene is rapidly and strongly upregulated after viral infection or by type I and type III IFNs, 1, 6, 13, 19, 20 lipopolysaccharide (LPS), 21, 22 tumor necrosis factor alpha (TNF-α), 22 or genotoxic stress 13, 23 (Figure 2a )."

reach
"The cloning of USP18 was also independently reported by 3 other groups in various species, and all confirmed the induction of USP18 by Type 1 IFN (Zhang and others 1999; Li and others 2000; Kang and others 2001) , consistent with the finding of highly conserved ISREs in the UBP43 promoter (Malakhova and others 2002) ."
SGCG increases the amount of USP18.
| 2
SGCG increases the amount of USP18. 2 / 2
| 2

reach
"The expression of USP18 is strongly induced by type I and type III interferons [2] [3] [4] [5] , by the Toll-like receptor (TLR) agonists LPS [6] [7] [8] and polyI:C [6] (synthetic analogy of dsRNA) and by TNFα [7] ."

reach
"ISG15 silencing decreased the amount of USP18 protein in recombinant IFN-λ4-treated cells, and the protein level of USP18 was restored not only by transfection of wild type (WT) ISG15 gene but also by transfection of conjugation-defective ISG15 AA mutant gene (Supplementary Fig. 8A)."
Protease affects USP18
| 1 6
| 1 6

sparser
"Thus, boosting ISG15 modification by protease inhibition of USP18 might represent a new strategy to interfere with viral replication."

reach
"Thus, boosting ISG15 modification by protease inhibition of USP18 might represent a new strategy to interfere with viral replication."

sparser
"Intriguingly, enhanced ISGylation in these mice mediated increased resistance against influenza and vaccinia virus infections and diminished myocarditis upon cocksackie virus B3 infection, thus qualifying USP18 protease inhibition as a potential antiviral strategy xref , xref ."

sparser
"Intriguingly, enhanced ISGylation in these mice mediated increased resistance against influenza and vaccinia virus infections and diminished myocarditis upon cocksackie virus B3 infection, thus qualifying USP18 protease inhibition as a potential antiviral strategy33,34."

sparser
"This mouse model shows enhanced ISGylation levels because of the USP18 protease inactivation whereas they do not show apparent phenotypic alterations (Ketscher et al., 2015)."

sparser
"This mouse model shows enhanced ISGylation levels because of the USP18 protease inactivation whereas they do not show apparent phenotypic alterations (Ketscher et al., xref )."

sparser
"This mouse model shows enhanced ISGylation levels because of the USP18 protease inactivation whereas they do not show apparent phenotypic alterations ."
NOTCH1 affects USP18
| 3 4
| 3 4

reach
"These experiments verified that USP18 could directly bind to Notch1 and regulate c-Myc expression via Notch1."

reach
"In our study, by screening a panel of DUBs, we demonstrated that USP18 interacts with Notch1."

sparser
"First, USP18 and Notch1 directly interact in pancreatic cancer cells."

sparser
"To test this hypothesis, we first observed whether USP18 and Notch1 directly interact in pancreatic cancer cells, and interestingly, co-IP demonstrated an interaction between USP18 and Notch1 ( xref and xref )."

sparser
"These experiments verified that USP18 could directly bind to Notch1 and regulate c-Myc expression via Notch1."

reach
"To test this hypothesis, we first observed whether USP18 and Notch1 directly interact in pancreatic cancer cells, and interestingly, co-IP demonstrated an interaction between USP18 and Notch1 (XREF_FIG and XREF_FIG)."

sparser
"In our study, by screening a panel of DUBs, we demonstrated that USP18 interacts with Notch1."
IFN-I affects USP18
| 7
IFN-I increases the amount of USP18.
| 3
IFN-I increases the amount of USP18. 3 / 3
| 3

reach
"Further studies show that the expression of USP18 by beta islet cells themselves is important for inhibiting diabetes.75, 76 On the one hand, the upregulation of USP18 expression by IFN-I in beta islet cells prevents the activity of proinflammatory chemokines such as CCL5, CXCL10, and IL-15 and consequently inhibits insulitis."

reach
"75, 76 On the one hand, the upregulation of USP18 expression by IFN-I in beta islet cells prevents the activity of proinflammatory chemokines such as CCL5, CXCL10, and IL-15 and consequently inhibits insulitis."

reach
"XREF_BIBR, XREF_BIBR On the one hand, the upregulation of USP18 expression by IFN-I in beta islet cells prevents the activity of proinflammatory chemokines such as CCL5, CXCL10, and IL-15 and consequently inhibits insulitis."
IFN-I inhibits USP18.
| 2
IFN-I inhibits USP18. 2 / 2
| 2

reach
"This could be explained by the IFN-I inhibiting activity of the Usp18."
| PMC

reach
"Suppressive pathways include IFN-I activation of USP18, an ISG that suppresses signal transduction by reducing the ability of IFN-Is to form an active receptor complex (38, 48)."
IFN-I activates USP18.
| 2
IFN-I activates USP18. 2 / 2
| 2

reach
"USP18 is transcriptionally induced by IFN-I and restrains global ISGylation by de-ISGylating substrates and also by inhibiting IFN-I signaling."

reach
"11 Moreover, infection with S. typhimurium enhances IFN-I signaling and inflammatory response in Usp18 lty9 mice."
HIRI affects USP18
| 2 5
HIRI increases the amount of USP18.
| 4
HIRI increases the amount of USP18. 4 / 4
| 4

reach
"Thus, in vivo liver inflammation leads to increased USP18 expression at the organ level.After determining that HIRI induces USP18 expression, we next wanted to examine the impact of HIRI on viral control."

reach
"As seen in XREF_FIG, HIRI alone induced USP18 mRNA expression in whole livers by> 10-fold that of untreated animals."

reach
"After determining that HIRI induces USP18 expression, we next wanted to examine the impact of HIRI on viral control."

reach
"As seen in Fig. 6A, HIRI alone induced USP18 mRNA expression in whole livers by >10-fold that of untreated animals."
HIRI activates USP18.
| 2 1
HIRI activates USP18. 3 / 3
| 2 1

eidos
"After determining that HIRI induces USP18 expression , we next wanted to examine the impact of HIRI on viral control ."

reach
"As seen in XREF_FIG, HIRI led to a significant increase in LCMV viral titers in USP18 +/+ mice, an effect that was not observed in USP18 -/- mice."

eidos
"As seen in Fig. 6B , HIRI led to a significant increase in LCMV viral titers in USP18 + / + mice , an effect that was not observed in USP18 - / - mice ."
USP18 affects TWIST1
| 1 2 3
USP18 binds TWIST1.
| 1 3
| 1 3

reach
"Mechanistically, USP18 interacts with Twist1, removes its ubiquitination off, and subsequently stabilizes it."

sparser
"Targeting USP18-Twist1 regulatory axis may open a novel avenue for GBM treatment."

sparser
"Interestingly, USP18 associates with TWIST1 and mediates the stabilization of TWIST1, thereby leading to glioblastoma cell migration and invasion."

sparser
"Mechanistically, USP18 interacts with Twist1, removes its ubiquitination off, and subsequently stabilizes it."
USP18 deubiquitinates TWIST1.
| 1 1
USP18 deubiquitinates TWIST1. 2 / 2
| 1 1

trips
"USP18 deubiquitinates and stabilizes Twist1 to promote epithelial-mesenchymal transition in glioblastoma cells."

reach
"USP18 deubiquitinates and stabilizes Twist1 to promote epithelial-mesenchymal transition in glioblastoma cells."
USP18 affects TRIM31
| 6
| 6

sparser
"The fact that different domains of MAVS mediate its interaction with TRIM31 and USP18 further suggests that USP18 is very likely to promote the interaction between TRIM31 and MAVS."

sparser
"Immunofluorescence assay showed that USP18 can colocalize with TRIM31 (Fig.  xref ), further suggesting the interaction between USP18 and TRIM31."

sparser
"Therefore, we hypothesized that USP18 interacts with TRIM31 and subsequently enhances the interaction between TRIM31 and MAVS."

sparser
"To test our hypothesis, we first examined whether the interaction between USP18 and TRIM31 existed."

sparser
"More importantly, we observed that the interaction between endogenous USP18 and TRIM31 was increased following SeV infection (Fig.  xref ), indicating USP18 may control the activity of TRIM31."

sparser
"We observed that USP18 did interact with TRIM31 through the Co-IP assay (Fig.  xref )."
USP18 affects MYC
| 3 3
USP18 binds MYC.
| 3
| 3

sparser
"Immunofluorescence assay showed that Myc-USP18 exhibited colocalization with Flag-MAVS (Fig.  xref )."

sparser
"There were no red spots when Myc-USP18 was co-transfected with the control Flag vector, while the transfection of both Myc-USP18 and Flag-MAVS resulted in significant numbers of red spots (Fig.  xref )."

sparser
"To further clarify the mechanism through which USP18 regulates c-Myc in pancreatic cancer cells, we first determined whether there was a direct interaction between the USP18 and c-Myc proteins."
USP18 activates MYC.
| 3
USP18 activates MYC. 3 / 3
| 3

reach
"To further validate that USP18 mediated the growth of PC cells by regulating c-Myc, we first increased the expression of c-Myc in USP18 knockdown PC cells and then measured the USP18 and c-Myc protein expression levels and cell proliferation."

reach
"USP18 null leiomyosarcoma cell lines are aneuploid and overexpress MYC."

reach
"Collectively, these data strongly suggested that USP18 positively regulates c-Myc in PC."
USP18 affects MIR7-1
| 1 3
USP18 inhibits MIR7-1.
| 1
USP18 inhibits MIR7-1. 1 / 3
| 1

eidos
"Accordingly , depletion of USP18 activates miR-7 and subsequently downregulates the expression of EGFR , thereby leading to the suppression of tumorigenesis and the facilitation of apoptosis of cancer cells ."
USP18 increases the amount of MIR7-1.
| 2
USP18 increases the amount of MIR7-1. 2 / 2
| 2

reach
"Knockdown of Usp18 was found to increase expression of miR-7 host genes and intergenic pri-miR-7-2 and subsequently mature miR-7 [XREF_BIBR]."

reach
"We found that Usp18 depletion elevates miR-7 levels in several cancer cell lines because of a transcriptional activation and/or mRNA stabilization of miR-7 host genes and that miR-7 acts downstream of Usp18 to regulate EGFR mRNA translation via the 3 '-UTR."
USP18 decreases the amount of MIR7-1.
| 1
USP18 decreases the amount of MIR7-1. 1 / 1
| 1

reach
"Usp18 decreases the expression of miR-7 host genes, as well as intergenic pri-miR-7-2 [XREF_BIBR]."
| PMC
USP18 affects IFNLR1
| 1 5
| 1 3

sparser
"However, the performed co-immunoprecipitation experiments did not suggest direct interaction of USP18 with IL-28R1 (Supporting Information xref )."

reach
"Indeed, preliminary data from our laboratory show that USP18 can bind to type III IFN receptor IL-28RA, and has no inhibitory effect on type III IFN signaling in U6A cells (Arimoto et al. unpublished data)."

sparser
"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling (Malakhova et al, xref ), we investigated a potential interaction of Usp18 with the IFN-λ specific receptor subunit IL-28R1."

sparser
"Indeed, preliminary data from our laboratory show that USP18 can bind to type III IFN receptor IL-28RA, and has no inhibitory effect on type III IFN signaling in U6A cells (Arimoto et al. unpublished data)."
| 2

sparser
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR ( xref )."

sparser
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR (81)."
USP18 affects FTO
| 3 3
USP18 binds FTO.
| 1 3
| 1 3

sparser
"These data implied an interaction between USP18 and FTO at protein but not mRNA level."

reach
"These data implied an interaction between USP18 and FTO at protein but not mRNA level."

sparser
"Conforming to its deubiquitinase property, the physical interaction of USP18 with FTO led to a lesser extent of ubiquitination in FTO than that was appeared upon silencing of USP18 ( xref )."

sparser
"HDOCK server [ xref ]-based protein-protein interaction analysis indicated that USP18 directly binds to FTO protein domain ranging from 190 to 220 amino acid, where the 3 putative ubiquitination sites are located ( xref )."
USP18 increases the amount of FTO.
| 1
Unubiquitinated USP18 increases the amount of FTO. 1 / 1
| 1

reach
"Song et al. (2021b) showed that USP18 post-translational deubiquitination up-regulates FTO protein expression, while FTO promotes BC occurrence and progression via its demethylase activity on PYCR1 to stabilize its transcript."
USP18 activates FTO.
| 1
USP18 activates FTO. 1 / 1
| 1

reach
"These data indicated that USP18 mediated increase of FTO protein stability exacerbates BLCA progression by enhancing carcinogenic properties of the tumor cells."
USP18 affects CDKN1A
| 6
USP18 inhibits CDKN1A.
| 2
USP18 inhibits CDKN1A. 2 / 2
| 2

reach
"P21 down-regulation by USP18 was associated with inactive form of SAMHD1, phosphorylated at T592."

reach
"USP18 (UBP43) Abrogates p21 Mediated Inhibition of HIV-1."
USP18 decreases the amount of CDKN1A.
| 2
USP18 decreases the amount of CDKN1A. 2 / 2
| 2

reach
"USP18 down-regulates p21 protein expression, which correlates with upregulated intracellular dNTP levels and the antiviral inactive form of SAMHD1."

reach
"CRISPR-Cas9 knockout of USP18 increased p21 protein expression and blocked HIV-1 replication."
USP18 activates CDKN1A.
| 2
USP18 activates CDKN1A. 2 / 2
| 2

reach
"We showed previously that USP18 contributes to HIV-1 replication by abrogating p21 antiviral function."

reach
"Here, we demonstrate a mechanism by which USP18 mediates p21 downregulation in myeloid cells."
TRIM31 affects USP18
| 6
| 6

sparser
"The fact that different domains of MAVS mediate its interaction with TRIM31 and USP18 further suggests that USP18 is very likely to promote the interaction between TRIM31 and MAVS."

sparser
"Immunofluorescence assay showed that USP18 can colocalize with TRIM31 (Fig.  xref ), further suggesting the interaction between USP18 and TRIM31."

sparser
"Therefore, we hypothesized that USP18 interacts with TRIM31 and subsequently enhances the interaction between TRIM31 and MAVS."

sparser
"To test our hypothesis, we first examined whether the interaction between USP18 and TRIM31 existed."

sparser
"More importantly, we observed that the interaction between endogenous USP18 and TRIM31 was increased following SeV infection (Fig.  xref ), indicating USP18 may control the activity of TRIM31."

sparser
"We observed that USP18 did interact with TRIM31 through the Co-IP assay (Fig.  xref )."
IKBKB affects USP18
2 | 2 2
2 | 2 2

reach
"To test this prediction, we transfected 293T cells with USP18 together with IKKalpha, IKKbeta, or NEMO expression plasmids and co-immunoprecipitation and immunoblot analysis revealed that USP18 interacted with IKKalpha, IKKbeta, and NEMO (XREF_FIG)."

sparser
"To determine the mechanism of the USP18 and IKKβ interaction, we generated deletion mutants encompassing the amino-terminal kinase domain (KD), leucine zipper domain (LZ), and a C-terminal helix-loop-helix (HLH) domain of IKKβ ( xref ), and performed immunoprecipitation to test their ability to interact with USP18."

sparser
"Similar to full-length IKKβ, all mutated domains could interact with USP18 ( xref ), suggesting that IKKβ may not be the direct target of USP18."

No evidence text available

reach
"To determine the mechanism of the USP18 and IKKbeta interaction, we generated deletion mutants encompassing the amino-terminal kinase domain (KD), leucine zipper domain (LZ), and a C-terminal helix-loop-helix (HLH) domain of IKKbeta (XREF_FIG), and performed immunoprecipitation to test their ability to interact with USP18."

No evidence text available
IFNLR1 affects USP18
| 1 5
| 1 3

sparser
"However, the performed co-immunoprecipitation experiments did not suggest direct interaction of USP18 with IL-28R1 (Supporting Information xref )."

reach
"Indeed, preliminary data from our laboratory show that USP18 can bind to type III IFN receptor IL-28RA, and has no inhibitory effect on type III IFN signaling in U6A cells (Arimoto et al. unpublished data)."

sparser
"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling (Malakhova et al, xref ), we investigated a potential interaction of Usp18 with the IFN-λ specific receptor subunit IL-28R1."

sparser
"Indeed, preliminary data from our laboratory show that USP18 can bind to type III IFN receptor IL-28RA, and has no inhibitory effect on type III IFN signaling in U6A cells (Arimoto et al. unpublished data)."
| 2

sparser
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR ( xref )."

sparser
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR (81)."
2,3,7,8-tetrachlorodibenzodioxine increases the amount of USP18.
4 |
4 |

No evidence text available

No evidence text available

No evidence text available

No evidence text available
2,3,7,8-tetrachlorodibenzodioxine decreases the amount of USP18.
2 |
2 |

No evidence text available

No evidence text available
Input affects USP18
| 5
Input activates USP18. 5 / 5
| 5

eidos
"Based on our experimental results , we postulated that the opposite effects induced by short versus prolonged pretreatment inputs might be caused by different expression kinetics of ISGF3 components and USP18 : a short input is sufficient to trigger ISGF3 expression and thereby the priming effect , whereas a prolonged input is required to induce USP18 expression and hence desensitization ."

eidos
"Computational modeling suggests a delayed negative feedback loop through USP18 Based on our experimental results , we postulated that the opposite effects induced by short versus prolonged pretreatment inputs might be caused by different expression kinetics of ISGF3 components and USP18 : a short input is sufficient to trigger ISGF3 expression and thereby the priming effect , whereas a prolonged input is required to induce USP18 expression and hence desensitization ."

eidos
"In summary , our modeling results suggest that a prolonged input is required to initiate USP18 upregulation ."

eidos
"Once the input duration is prolonged enough to induce USP18 upregulation , the negative regulation by USP18 overrides the positive regulation by ISGF3 , resulting in desensitization ."

eidos
"Furthermore , this difference caused by different input dynamics was abolished in USP18-KD cells ( Figure 3F ; Figure In summary , our modeling results suggest that a prolonged input is required to initiate USP18 upregulation ."
USP18 affects transport
| 5
| 5

reach
"Warsi, et al demonstrated that transport activity of rabbit peptide transporters Pept1 and Pept2 was decreased in Xenopus laevis oocytes injected with cRNA encoding the E3 ubiquitin ligase Nedd4-2, whereas overexpression of USP18 (Ubiquitin like specific protease 18), an enzyme cleaving ubiquitin from target proteins, stimulated the transport activity of rbPept1 and rbPept2 [XREF_BIBR]."

reach
"XREF_BIBR, XREF_BIBR A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein."

reach
"Accordingly, USP18 apparently enhances the maximal transport rate."

reach
"16, 23 A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein."

reach
"53 In addition to ISG15, USP18 also specifically inhibits K63-linked ubiquitination of NEMO, leading to the negative regulation of NF-κB activation induced by the TAK1-TAB complex.16, 23 A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein.54The innate immune system reduces viral replication via IFN-I; this reduction is essential for inhibiting the spread of virus to other organs."
USP18 affects SNAI1
| 5
| 5

sparser
"Figure  xref g further identified the interaction between USP18 protein and Snail1 protein."

sparser
"Moreover, we examined the potential interaction between USP18 protein and Snail1 protein in cellular using Co-immunoprecipitation (Co-IP)."

sparser
"Snail1 can directly interact with USP18 in cellular."

sparser
"Figure  xref f showed that USP18 protein could interact with Snail protein."

sparser
"Snail1 could directly interact with USP18 in cells."
USP18 affects SAMHD1
| 2 3
USP18 binds SAMHD1.
| 1 3
| 1 1

sparser
"USP18 bound directly to SAMHD1 in the cell nucleus and complexed with cyclin A, CDK1 and 2."
| PMC

reach
"USP18 formed a complex with the E3 ubiquitin ligase recognition factor SKP2 (S-phase kinase associated protein 2) and SAMHD1."
| 2

sparser
"USP18 formed a complex with the E3 ubiquitin ligase recognition factor SKP2 (S-phase kinase associated protein 2) and SAMHD1."

sparser
"Numerous studies have reported that SAMHD1 can interact with cyclin/CDK complexes ( xref ), USP18 ( xref ) and S-phase kinase-associated protein 2 ( xref ), which are involved in the regulation of cell proliferation ( xref , xref )."
USP18 inhibits SAMHD1.
| 1
USP18 inhibits SAMHD1. 1 / 1
| 1

reach
"Immune regulatory components whose downregulation improves anti-HIV responses include activated leukocyte cell adhesion molecular (ALCAM) , ubiquitin-specific proteinase 18 (USP18) which negatively regulates type I interferon responses and SAMHD1 in macrophages , and miR-146a that represses antiviral cytokine signaling ."
USP18 affects PCNA
2 | 3
2 | 3

sparser
"Overexpressed PCNA could bind to UBP43 ( Figure 7 A, top)."

sparser
"To determine the fate of ISGylated PCNA that appeared 12–24 hr after UV treatment ( Figures 2 B and 2C), we first examined whether PCNA could interact with UBP43."

No evidence text available

sparser
"On the other hand, endogenous UBP43 interacted with PCNA only at 36 hr (i.e., when the level of UBP43 was dramatically increased) ( Figure 7 A, bottom)."

No evidence text available
USP18 affects CXCL10
| 1 4
USP18 decreases the amount of CXCL10.
| 3
USP18 decreases the amount of CXCL10. 3 / 3
| 3

reach
"These results were confirmed in primary rat beta cells (XREF_FIG) in which USP18 inhibition upregulated CXCL10, CCL5 and IL-15 mRNA expression."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."
USP18 increases the amount of CXCL10.
| 1
USP18 increases the amount of CXCL10. 1 / 1
| 1

reach
"Hypersensitivity of PyVmT and Usp18 KO MECs to IFN-lambda enhances upregulation of Cxcl10 expression and inhibits tumour progression."
USP18 activates CXCL10.
| 1
USP18 activates CXCL10. 1 / 1
| 1

eidos
"STAT1 , USP18 and IRF1 modulate CXCL10 levels in EC following IFN-alpha stimulation To validate the transcriptional regulations inferred in our multiple-output FFL regulatory subnetwork ( Fig. 2 ) , we measured CXCL10 protein levels in tissue culture media conditioned by STAT1 - , USP18 - , IFIH1 - and IRF1-silenced HUVECs , compared to HUVECs transfected with a scrambled siRNA ( siCTRL ) ."
USP18 affects CHUK
2 | 1 1
2 | 1

No evidence text available

No evidence text available

reach
"To test this prediction, we transfected 293T cells with USP18 together with IKKalpha, IKKbeta, or NEMO expression plasmids and co-immunoprecipitation and immunoblot analysis revealed that USP18 interacted with IKKalpha, IKKbeta, and NEMO (XREF_FIG)."
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
USP18 affects AKT
| 5
USP18 activates AKT. 5 / 5
| 5

reach
"In conclusion, USP18 promoted the proliferation and migration of ovarian cancer cells by activating AKT/mTOR signaling."

reach
"USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway."

reach
"USP18 contributes to the proliferation and migration of ovarian cancer cells by regulating the AKT/mTOR signaling pathway."

reach
"Tan et al. have demonstrated that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway."

reach
"For instance, Tan et al. found that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT and Skp2 pathway [XREF_BIBR]."
STAT1 affects USP18
| 1 4
STAT1 activates USP18.
| 1 2
STAT1 activates USP18. 3 / 3
| 1 2

reach
"The second mechanism is the recently described inhibition of STAT1 phosphorylation by UBP43 (the product of ISG43) through its inhibition of JAK1 interaction with the IFNAR2 subunit of the type I IFN receptor XREF_BIBR."

eidos
"STAT1 , USP18 and IRF1 modulate CXCL10 levels in EC following IFN-alpha stimulation To validate the transcriptional regulations inferred in our multiple-output FFL regulatory subnetwork ( Fig. 2 ) , we measured CXCL10 protein levels in tissue culture media conditioned by STAT1 - , USP18 - , IFIH1 - and IRF1-silenced HUVECs , compared to HUVECs transfected with a scrambled siRNA ( siCTRL ) ."

reach
"This study showed that type I IFNs (but not type II IFNs) were required for CD95 induced stemness and did so through the phosphorylation and activation of STAT1 and upregulation of the STAT1 targets PLSCR1, USP18, and HERC8."
STAT1 inhibits USP18.
| 2
STAT1 inhibits USP18. 2 / 2
| 2

reach
"The same procedure was performed for CRISPR based tagging the additional genes, STAT1, IRF9 and USP18 sequentially.The knockdown of USP18 by shRNA was done using retrovirus transduction."

reach
"Of note, we did not find evidence that STAT1 mediates the USP18 dependent reduction in neurogenesis."
SNAI1 affects USP18
| 5
| 5

sparser
"Figure  xref g further identified the interaction between USP18 protein and Snail1 protein."

sparser
"Moreover, we examined the potential interaction between USP18 protein and Snail1 protein in cellular using Co-immunoprecipitation (Co-IP)."

sparser
"Snail1 can directly interact with USP18 in cellular."

sparser
"Figure  xref f showed that USP18 protein could interact with Snail protein."

sparser
"Snail1 could directly interact with USP18 in cells."
PCNA affects USP18
2 | 3
2 | 3

sparser
"Overexpressed PCNA could bind to UBP43 ( Figure 7 A, top)."

sparser
"To determine the fate of ISGylated PCNA that appeared 12–24 hr after UV treatment ( Figures 2 B and 2C), we first examined whether PCNA could interact with UBP43."

No evidence text available

sparser
"On the other hand, endogenous UBP43 interacted with PCNA only at 36 hr (i.e., when the level of UBP43 was dramatically increased) ( Figure 7 A, bottom)."

No evidence text available
JAK1 affects USP18
| 2 3
| 2 3

sparser
"Binding of UBP43 to IFNAR2 in vivo displaced JAK1 from IFNAR2 and led to the inhibition of the downstream phosphorylation cascade and other signaling events [51]."

reach
"Based on mutational studies it was suggested that USP18 binds to the intracellular region of type I IFN receptor subunit IFNAR2 and outcompetes the downstream kinase JAK1 thereby abrogating IFN signaling36."

reach
"Based on mutational studies it was suggested that USP18 binds to the intracellular region of type I IFN receptor subunit IFNAR2 and outcompetes the downstream kinase JAK1 thereby abrogating IFN signaling XREF_BIBR."

sparser
"Binding of UBP43 to IFNAR2 in vivo displaced JAK1 from IFNAR2 and led to the inhibition of the downstream phosphorylation cascade and other signaling events xref ."

sparser
"The molecular mechanisms remain incompletely understood, but ISG15 seems to stabilize binding of USP18 to JAK1 which inhibits activation of STATs."
Infections affects USP18
| 4
Infections increases the amount of USP18.
| 2
Infections increases the amount of USP18. 2 / 3
| 2

reach
"Ye et al. (2021) demonstrated that DENV-2 infection increased USP18 expression; USP18 overexpression enhanced DENV-2 replication, while USP18 silencing inhibited DENV-2 replication by activating the IFN-α-mediated JAK/STAT signaling pathway."

reach
"Here we studied the role of ISG15-specific ubiquitin-like protease 43 (USP18) in HIV-1 innate immune sensing.HIV-1 infection induces the expression of USP18 in PMA-differentiated THP-1 cells."
| PMC
Infections activates USP18.
| 2
| 2

reach
"11 Moreover, infection with S. typhimurium enhances IFN-I signaling and inflammatory response in Usp18 lty9 mice."

reach
"In a recent study, Ye et al. (2021) showed that USP18 induced by DENV-2 infection is a critical host factor used by DENV-2 to antagonize IFN-α production."
CHUK affects USP18
2 | 1 1
2 | 1

No evidence text available

No evidence text available

reach
"To test this prediction, we transfected 293T cells with USP18 together with IKKalpha, IKKbeta, or NEMO expression plasmids and co-immunoprecipitation and immunoblot analysis revealed that USP18 interacted with IKKalpha, IKKbeta, and NEMO (XREF_FIG)."
| 1

sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
All-trans-retinoic acid increases the amount of USP18.
1 |
All-trans-retinoic acid increases the amount of USP18. 1 / 2
1 |

No evidence text available
All-trans-retinoic acid decreases the amount of USP18.
2 |
All-trans-retinoic acid decreases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
USP20 affects STING1
| 4
| 4

sparser
"Our above results demonstrated that (1) USP18 and USP20 correlate with limited oHSV-1 T1012G virus yields in SCC9 cells; (2) USP18 and USP20 interact with STING and alter the levels of STING proteins in SCC9 cells; and (3) altered STING accumulation regulates viral replication in SCC9 and SCC25 cells, while we need to further examine whether the DUB activity of USP18 or USP20 is crucial for the regulation of STING stabilization and oHSV-1 T1012G virus replication."

sparser
"Collectively, these results showed that USP18 and USP20 interact with STING and that a deficiency of either USP18 or USP20 affects the stability of STING in SCC9 cells."

sparser
"Immunoprecipitation revealed that both USP18 and USP20 interacted with the N-terminal region of the STING protein."

sparser
"We found that USP18 and USP20 both interact with STING in SCC9 cells."
USP18 affects process
| 2 2
USP18 inhibits process. 4 / 4
| 2 2

eidos
"ISG15 is an IFN-induced protein that extracellularly stimulates the production of type II IFN , and intracellularly it binds lysine residues of proteins ( ISGylation ) ; this process can be reversed by USP18 ."

eidos
"This process allows ISG15 to bind covalently to a range of target proteins , both viral and cellular [ 58 ] , by a process that is reversible due to the action of the ubiquitin-specific protease 18 ( USP18 ) , an event regulated by type I IFN [ 59 ] ."

sparser
"As in the ligand-binding assays, dimerization efficiency depended on the ligand’s affinity for IFNAR1, and the process was inhibited by USP18."
| PMC

sparser
"By comparing the behavior of IFNα2 mutants with different affinities for the two receptor subunits, the researchers concluded that IFNs do, in fact, recruit IFNAR1 into a ternary complex with IFNAR2, and that this process is inhibited by USP18. “Cells expressing USP18 lose the ability to bind IFNα2 because receptor dimerization isn’t as efficient,” Piehler says."
| PMC
USP18 affects isopeptidase
| 4
USP18 activates isopeptidase.
| 3
USP18 activates isopeptidase. 3 / 3
| 3

reach
"USP18 can increase HBV susceptibility by removing isopeptidase activity of ISG15 and promoting HBV replication by downregulating the I-IFN signal transduction pathway."

reach
"This isopeptidase independent activity is mediated by the binding of USP18 to the intracellular domain of IFNAR2, which prevents the binding of JAK1."

reach
"This was accompanied by increased levels of ISGylation, suggesting a possible involvement of USP18 mediated isopeptidase activity in this process [21]."
USP18 inhibits isopeptidase.
| 1
Mutated USP18 inhibits isopeptidase. 1 / 1
| 1

reach
"In the mouse, a mutation of the USP18 protein within the Cys box at position 61 completely abolishes the isopeptidase activity of the protein by replacing the active site of cysteine C61 with codon specific for alanine C61A."
USP18 affects autophagy
| 1 3
| 1 3

reach
"USP18 reduces paclitaxol sensitivity of triple-negative breast cancer via autophagy."

reach
"In addition, ISGylation of BECN1 inhibits PI3KC3 complex activation, which plays a pivotal role in autophagy, and USP18 positively regulates autophagy by promoting de-ISGylation of BECN1 [36, 37]."

reach
"Mechanistically, USP18 induced autophagy, an important pathway in chemotherapy resistance."

eidos
"Mechanistically , USP18 induced autophagy , an important pathway in chemotherapy resistance ."
USP18 affects activity
| 1 3
USP18 inhibits activity. 4 / 4
| 1 3

sparser
"In vitro experiments demonstrated that USP18 inhibited BV2 microglial activity and reduced the mRNA and protein levels of NF-κB, JAK1, p-JAK1, STAT1, and p-STAT1 in BV2 microglial cells."

sparser
"In this screening, USP18 and USP21 significantly inhibited RIG-I-CARD–induced IFN-β reporter activity, whereas other USPs had no effect or fewer effects ( xref )."

reach
"For example, the expression of USP18, which is an inhibitor of antiviral activity of IFN- λ, was elevated in liver biopsies of HCV patients who carried the ΔG allele and were thus capable of producing IFN- λ4 (28)."

sparser
"This findings suggest that USP18 inhibits I-IFN-mediated hepatocyte antiviral activity and may be involved in the immune tolerance of chronic hepatitis virus infection."
USP18 affects USP18
| 3
USP18 activates USP18.
| 2
USP18 activates USP18. 2 / 3
| 2

reach
"In GM-CSF-supplemented culture, over-expression of Usp18 restored the development of CD11b + CD11c + cells in Usp18 deficient BM cells, but did not affect DC development in wild-type BM cells (XREF_FIG), which confirmed the notion that the development defect of BM-DCs is intrinsic to Usp18 deficient cells."

reach
"Usp18 (-/-) BM cells were rescued by exogenous expression of either wild-type or deconjugation-inactive Usp18, and superimposition of an IFN-alpha and beta receptor knockout returned in vivo DC populations to normal, clearly showing that the defect seen is due solely to Usp18 's effect on IFN signaling."
USP18 inhibits USP18.
| 1
USP18 inhibits USP18. 1 / 1
| 1

reach
"The process can be reversed by the action of Ubiquitin Specific Peptidase 18 (USP18), a member of the deubiquitinase family which is the only ISG15-specific deubiquitinase enzyme that has been described so far [11]."
USP18 affects UBL
| 4
USP18 binds ISG15 and UBL. 4 / 4
| 4

sparser
"Structural data demonstrated that only the ISG15 C-terminal but not the N-terminal UBL domain binds USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., 2017)."

sparser
"However, only the C-terminal Ubl domain of ISG15 interacts with USP18 whereas no interaction between the N-terminal Ubl domain and USP18 was detected and the presence of the N-terminal domain of ISG15 is dispensable for the deISGylation activity of USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., xref )."
USP18 affects TNFSF10
| 3 1
USP18 activates TNFSF10. 4 / 4
| 3 1

reach
"23 A study using an oncogenic cell line (E1A cells) found that USP18 activates the extrinsic TNF-related apoptosis-inducing ligand (TRAIL) pathway after IFN-α challenge."

reach
"Indeed, it has been shown that ablating USP18, the enzyme that deconjugates ISG15 from target proteins, increased TRAIL production and promoted the extrinsic apoptosis pathway in cells treated with IF[MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"

reach
"23 A study using an oncogenic cell line (E1A cells) found that USP18 activates the extrinsic TNF related apoptosis inducing ligand (TRAIL) pathway after IFN-alpha challenge."

sparser
"Treating Usp18 -deficient hematopoietic cells with Poly I:C decreases the number of white blood cells since apoptosis is not prevented by USP18. xref Moreover, knocking down USP18 markedly enhances the NF- κ B signaling induced by various TLR ligands. xref A study using an oncogenic cell line (E1A cells) found that USP18 activates the extrinsic TNF-related apoptosis-inducing ligand (TRAIL) pathway after IFN- α challenge. xref In human promonocytic THP-1 cells, the expression of proinflammatory cytokines such as TNF- α , interleukin-6 (IL-6), and IL-1 β is significantly higher when USP18 is silenced with siRNA. xref Interestingly, in contrast to E1A cells, Usp18 -deficient murine bone marrow cells and THP-1 cells that have been treated with IFN α / β do not experience apoptosis after treatment with TRAIL or FASL. xref However, IFN- α / β still triggers apoptosis in these cells through the mitochondrial pathway and the reactive oxygen species pathway, xref a finding indicating that USP18 influences cell survival in various pathways depending on the cell type."
USP18 affects SLC15A2
| 3
USP18 activates SLC15A2. 3 / 4
| 3

reach
"53 In addition to ISG15, USP18 also specifically inhibits K63-linked ubiquitination of NEMO, leading to the negative regulation of NF-κB activation induced by the TAK1-TAB complex.16, 23 A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein.54The innate immune system reduces viral replication via IFN-I; this reduction is essential for inhibiting the spread of virus to other organs."

reach
"XREF_BIBR, XREF_BIBR A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein."

reach
"16, 23 A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein."
USP18 affects SLC15A1
| 3
USP18 activates SLC15A1. 3 / 4
| 3

reach
"16, 23 A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein."

reach
"XREF_BIBR, XREF_BIBR A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein."

reach
"53 In addition to ISG15, USP18 also specifically inhibits K63-linked ubiquitination of NEMO, leading to the negative regulation of NF-κB activation induced by the TAK1-TAB complex.16, 23 A recent study found that USP18 can enhance the cellular transport rate in Xenopus laevis oocytes by increasing the activity of PEPT1 and PEPT2; this activation was believed to be due to the reversal of ubiquitination and the subsequent degradation of carrier protein.54The innate immune system reduces viral replication via IFN-I; this reduction is essential for inhibiting the spread of virus to other organs."
USP18 affects PC
| 1 3
USP18 activates PC. 4 / 4
| 1 3

reach
"USP18 promotes PC cell growth in vitro and in vivo."

reach
"To further validate that USP18 mediated the growth of PC cells by regulating c-Myc, we first increased the expression of c-Myc in USP18 knockdown PC cells and then measured the USP18 and c-Myc protein expression levels and cell proliferation."

eidos
"( G ) Proposed model by which USP18 promotes PC progression by modifying Notch1 / c-Myc axis ."

reach
"USP18 promotes PC cell growth by facilitating cell cycle progression."
USP18 affects IKK_complex
| 3 1
USP18 dephosphorylates IKK_complex.
| 2
USP18 leads to the dephosphorylation of IKK_complex. 2 / 2
| 2

reach
"We also found that USP18 blocked IKK phosphorylation by inhibiting the ubiquitination of NEMO."

reach
"Conversely, knockdown of USP18 in THP-1 and THP-1-derived macrophages enhanced the phosphorylation of IKK, the degradation of IKBalpha and expression of proinflammatory cytokines, such as IL-6, TNF-alpha and IL-1beta in response to LPS treatment These results suggest that USP18 is a novel negative regulator of NF-kappaB signaling."
USP18 phosphorylates IKK_complex.
| 1
USP18 leads to the phosphorylation of IKK_complex. 1 / 1
| 1

reach
"Knockdown of USP18 enhanced the phosphorylation of IKK, the degradation of IkappaB, and augmented the expression of pro inflammatory cytokines."
| 1

sparser
"Taken together, these results suggest that in addition to the TAK1-TAB1 complex, USP18 also interacts with the IKK complex upon LPS treatment in a NEMO-dependent manner."
USP18 affects IFN-lambda
| 2 2
USP18 inhibits IFN-lambda. 4 / 4
| 2 2

eidos
"For example , the ISG USP18 desensitizes cells to further IFN-alpha stimulation but does not inhibit IFN-lambda signaling ( Fran c ois-Newton et al ., 2011 ) ."

reach
"The reason for this paradox is unknown, but IFN-lambda4 has been speculated to render HCV infected hepatocytes refractory to IFN-alpha, for example by inducing the expression of USP18, which inhibits IFN-alpha but not IFN-lambda signaling XREF_BIBR."

reach
"For example, the ISG USP18 desensitizes cells to further IFN-alpha stimulation but does not inhibit IFN-lambda signaling."

eidos
"The reason for this paradox is unknown , but IFN-lambda4 has been speculated to render HCV-infected hepatocytes refractory to IFN-alpha , for example by inducing the expression of USP18 , which inhibits IFN-alpha but not IFN-lambda signaling41 ."
USP18 affects IFIH1
| 2
USP18 inhibits IFIH1.
| 1
USP18 inhibits IFIH1. 1 / 2
| 1

reach
"Immunofluorescence analysis using specific dsRNA antibodies showed a significant and time-dependent accumulation of dsRNA in the USP18 KO cells after IFN treatment, indicating that USP18-dependent ISGylation under these conditions could inhibit ADAR activity.In addition to ADAR, PKR, RIG-I and MDA5, we found other proteins involved in antigen presentation and resistance to immunotherapy, such as TAP1, GBP1, STAT1, IFIT1, PSMB10, PSMB9, GBP2, MAGE and PARP14, also regulated by USP18-dependent ISGylation."
USP18 activates IFIH1.
| 1
USP18 activates IFIH1. 1 / 2
| 1

reach
"20 IFNalpha did not induce MDA5 expression in siCTRL tranfected cells, but MDA5 mRNA was upregulated by 24-fold in USP18 inhibited INS-1E cells after IFNalpha treatment (XREF_FIG)."
UBL affects USP18
| 4
USP18 binds ISG15 and UBL. 4 / 4
| 4

sparser
"Structural data demonstrated that only the ISG15 C-terminal but not the N-terminal UBL domain binds USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., 2017)."

sparser
"However, only the C-terminal Ubl domain of ISG15 interacts with USP18 whereas no interaction between the N-terminal Ubl domain and USP18 was detected and the presence of the N-terminal domain of ISG15 is dispensable for the deISGylation activity of USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., xref )."
TWIST1 affects USP18
| 1 3
| 1 3

reach
"Mechanistically, USP18 interacts with Twist1, removes its ubiquitination off, and subsequently stabilizes it."

sparser
"Targeting USP18-Twist1 regulatory axis may open a novel avenue for GBM treatment."

sparser
"Interestingly, USP18 associates with TWIST1 and mediates the stabilization of TWIST1, thereby leading to glioblastoma cell migration and invasion."

sparser
"Mechanistically, USP18 interacts with Twist1, removes its ubiquitination off, and subsequently stabilizes it."
TLR affects USP18
| 4
TLR increases the amount of USP18.
| 3
TLR increases the amount of USP18. 3 / 3
| 3

reach
"These results indicate that USP18 expression can be induced by TLR induced signaling pathways, which, in turn, can suppress TLR mediated NF-kappaB activation to form a negative feedback loop."

reach
"Furthermore, TLR ligands, LPS, Pam3CSK4 and CL097 all gave the same result of increased mRNA level of USP18, supporting that TLR-induced signaling pathway induces USP18 expression [42]."

reach
"Other TLR ligands, such as Pam3CSK4 (TLR2 ligand) or CL097 (TLR7/8 ligand), could also induce USP18 expression in THP-1 cells (XREF_FIG)."
TLR activates USP18.
| 1
TLR activates USP18. 1 / 1
| 1

reach
"USP18 was upregulated by various TLR ligands in THP-1 (a human monocyte cell line) cells and inhibited IkappaB degradation as well as NF-kappaB activation to form a negative feedback loop."
STING1 affects USP20
| 4
| 4

sparser
"Our above results demonstrated that (1) USP18 and USP20 correlate with limited oHSV-1 T1012G virus yields in SCC9 cells; (2) USP18 and USP20 interact with STING and alter the levels of STING proteins in SCC9 cells; and (3) altered STING accumulation regulates viral replication in SCC9 and SCC25 cells, while we need to further examine whether the DUB activity of USP18 or USP20 is crucial for the regulation of STING stabilization and oHSV-1 T1012G virus replication."

sparser
"Collectively, these results showed that USP18 and USP20 interact with STING and that a deficiency of either USP18 or USP20 affects the stability of STING in SCC9 cells."

sparser
"Immunoprecipitation revealed that both USP18 and USP20 interacted with the N-terminal region of the STING protein."

sparser
"We found that USP18 and USP20 both interact with STING in SCC9 cells."
SAMHD1 affects USP18
| 1 3
| 1 1

sparser
"USP18 bound directly to SAMHD1 in the cell nucleus and complexed with cyclin A, CDK1 and 2."
| PMC

reach
"USP18 formed a complex with the E3 ubiquitin ligase recognition factor SKP2 (S-phase kinase associated protein 2) and SAMHD1."
| 2

sparser
"USP18 formed a complex with the E3 ubiquitin ligase recognition factor SKP2 (S-phase kinase associated protein 2) and SAMHD1."

sparser
"Numerous studies have reported that SAMHD1 can interact with cyclin/CDK complexes ( xref ), USP18 ( xref ) and S-phase kinase-associated protein 2 ( xref ), which are involved in the regulation of cell proliferation ( xref , xref )."
MYC affects USP18
| 1 3
MYC binds USP18.
| 3
| 3

sparser
"Immunofluorescence assay showed that Myc-USP18 exhibited colocalization with Flag-MAVS (Fig.  xref )."

sparser
"There were no red spots when Myc-USP18 was co-transfected with the control Flag vector, while the transfection of both Myc-USP18 and Flag-MAVS resulted in significant numbers of red spots (Fig.  xref )."

sparser
"To further clarify the mechanism through which USP18 regulates c-Myc in pancreatic cancer cells, we first determined whether there was a direct interaction between the USP18 and c-Myc proteins."
MYC activates USP18.
| 1
MYC activates USP18. 1 / 1
| 1

reach
"Further investigation revealed that USP18 promoted cell progression by increasing c-Myc expression, which has been reported to control pancreatic cancer progression, and our data demonstrated that c-Myc is key for USP18 mediated pancreatic cancer cell progression in vitro and in vivo."
ISG15 affects UBL, and USP18
| 4
USP18 binds ISG15 and UBL. 4 / 4
| 4

sparser
"Structural data demonstrated that only the ISG15 C-terminal but not the N-terminal UBL domain binds USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., 2017)."

sparser
"However, only the C-terminal Ubl domain of ISG15 interacts with USP18 whereas no interaction between the N-terminal Ubl domain and USP18 was detected and the presence of the N-terminal domain of ISG15 is dispensable for the deISGylation activity of USP18."

sparser
"The crystal structure of mouse USP18 in complex with mouse ISG15 displayed extensive interaction between the ISG15 C-terminal Ubl domain and the palm and thumb domain of USP18 (Basters et al., xref )."
IFN-λ4 affects USP18
| 4
IFN-λ4 inhibits USP18.
| 2
IFN-λ4 inhibits USP18. 2 / 2
| 2

reach
"Moreover, we identified ISG15 as a critical regulator for increased USP18 protein levels in IFN-λ4-expressing or -treated cells and demonstrated for the first time that DAAs can restore IFN-α responsiveness by decreasing the production of endogenous IFN-λs, including IFN-λ4, in HCV-infected cells.Taken together, our data clearly demonstrate that virus-induced IFN-λ4 potently blocked IFN-α signalling via upregulation of ISG15 and USP18 in HCV infection and that DAA therapy restored the IFN-α responsiveness The cells were harvested, and protein expression was analysed by immunoblotting."

reach
"Moreover, we identified ISG15 as a critical regulator for increased USP18 protein levels in IFN-λ4-expressing or -treated cells and demonstrated for the first time that DAAs can restore IFN-α responsiveness by decreasing the production of endogenous IFN-λs, including IFN-λ4, in HCV-infected cells.Taken together, our data clearly demonstrate that virus-induced IFN-λ4 potently blocked IFN-α signalling via upregulation of ISG15 and USP18 in HCV infection and that DAA therapy restored the IFN-α responsiveness of HCV-infected cells."
IFN-λ4 decreases the amount of USP18.
| 2
IFN-λ4 decreases the amount of USP18. 2 / 2
| 2

reach
"These results demonstrate that virus-induced IFN-λ4 potently blocks IFN-α signalling by inducing high protein levels of ISG15 and USP18."

reach
"Recently, Fan et al. also demonstrated that IFN-λ4 inhibits the JAK-STAT signalling pathway by inducing USP18 expression 28 ."
HIV-1 affects USP18
| 4
HIV-1 activates USP18. 4 / 4
| 4

eidos
"Since USP18 is induced by HIV-1 in iMacs in a similar manner as MDMs , we concluded that iMacs are a better model for studying USP18 knockout / knockdown than THP-1 cells ."

eidos
"Indeed , USP18 + / + iMacs support HIV-1 replication and USP18 is induced by HIV-1 in these cells ( Figs ."

eidos
"We next determined if iMacs can support HIV-1 replication as previously reported 48 and if USP18 is induced by HIV-1 in iMacs ."

eidos
"Here , we demonstrate that USP18 expression is induced by HIV-1 in a T1 IFN-dependent manner ."
FTO affects USP18
| 1 3
| 1 3

sparser
"These data implied an interaction between USP18 and FTO at protein but not mRNA level."

reach
"These data implied an interaction between USP18 and FTO at protein but not mRNA level."

sparser
"Conforming to its deubiquitinase property, the physical interaction of USP18 with FTO led to a lesser extent of ubiquitination in FTO than that was appeared upon silencing of USP18 ( xref )."

sparser
"HDOCK server [ xref ]-based protein-protein interaction analysis indicated that USP18 directly binds to FTO protein domain ranging from 190 to 220 amino acid, where the 3 putative ubiquitination sites are located ( xref )."
| 3
| 3

eidos
"USP18 , a protein of 368 aa in length and an ISG15 isopeptidase , is a negative regulator of type I and III IFN-activated JAK / STAT signaling [ 142 ] , and is rapidly upregulated by viral infection and IFNs ."

eidos
"USP18 has been known to be induced by viral infection , genotoxic stress or interferon [ 97 ] ."

eidos
"USP18 is promptly induced by viral infection and IFN signaling [ 46 ] ."
Type I IFNs affects USP18
| 3
Type I IFNs increases the amount of USP18. 3 / 3
| 3

reach
"16 Both USP18 expression and conjugation of ISG15 are strongly induced by viral infections and type I IFNs, XREF_BIBR, XREF_BIBR suggesting that protein modifications by USP18 regulated ISG15 have a role in responses to viruses and type I IFN signaling."

reach
"In innate cells, it has been reported that type I IFNs or viral infection induces expression of Usp18."

reach
"USP18 gene expression has been found at low levels in multiple tissues and cell lines and could be rapidly up-regulated by type I IFNs."
Inflammatory affects USP18
| 3
Inflammatory activates USP18. 3 / 3
| 3

eidos
"We sought to determine whether inflammatory stimuli could increase USP18 expression in hepatocytes ."

eidos
"These data point out that USP18 can be induced by inflammatory stimuli in multiple cell types in the absence of IFN ."

eidos
"For example , inflammatory stimuli , e.g ., endotoxin and lipopolysaccharide ( LPS ) , have been shown to upregulate USP18 in peritoneal exudate macrophages ( 18 ) ."
Ubiquitin affects USP18
| 3

sparser
"In contrast, no binding of USP18 to the respective Ub probe45 was observed (Fig. 2b)."

sparser
"In contrast, no binding of USP18 to the respective Ub probe xref was observed ( xref )."

sparser
"Our results clearly show that USP18 exhibits no reactivity towards ubiquitin in vitro indicating/demonstrating that the described inhibition of the NF-κB pathway by USP18 is rather an indirect effect and not mediated by direct interaction between USP18 and ubiquitin."
USP41 affects USP18
3 |
3 |

No evidence text available

No evidence text available

No evidence text available
USP18 affects interaction
| 1 2
USP18 inhibits interaction. 3 / 3
| 1 2

eidos
"USP18 specifically interacts with the IFNAR2 subunit to inhibit the interaction between JAK and the IFN receptor ( 60 ) ."

sparser
"UBP43 binds to IFNAR2 and inhibits the interaction between JAK1 and IFNAR2; this is independent of its isopeptidase activity."

sparser
"The isopeptidase activity of UBP43 responsible for deconjugation of ISG15ylated proteins, however, is not required for the inhibition of STAT1 phosphorylation, which appears to be mediated instead through direct inhibition by UBP43 of the interaction of JAK1 with the type I IFN receptor xref ."
| 3

reach
"USP2b, USP3, USP18, USP25, UL36USP and HAUSP play a role of antivirus; while USP4, USP13, USP15 and USP17 negatively regulate antiviral immune response."

reach
"Ectopic expression of USP18 in tumor cells suppressed tumorigenesis and antitumor immune response whereas inhibition of USP18 expression promoted tumorigenesis and immunosurveillance."

reach
"USP18 enzymatic function typically attenuates the immune response by removing interferon-stimulated gene 15 (ISG15) from protein substrates."

reach
"USP18 induction by HIV-1 tunes the IFN response to optimal levels allowing for efficient transcription from the HIV-1 LTR promoter while minimizing the T1 IFN-induced antiviral response that would otherwise restrict viral replication and spread."

reach
"By providing exogenous IFN‐β, we were able to demonstrate that lack of USP18 makes cells more sensitive to the effects of IFN.The strategy used by HIV‐1 for transcription from its LTR promoter utilizes transcription factors such as NFκB, NFAT, and IRFs,73, 74 that would normally be present in a cell that has detected a viral infection and has initiated an antiviral response."

reach
"The average RQ of the USP18 −/− clones divided by the average RQ of the USP18 +/+ clones are expressed as fold change The strategy used by HIV-1 for transcription from its LTR promoter utilizes transcription factors such as NF B, NFAT, and IRFs, 73,74 that would normally be present in a cell that has detected a viral infection and has initiated an antiviral response."
| 1 2

eidos
"We show here , in addition , that USP18 was also able to prevent senescence , since its basal level was increased in USP18-silenced cells ."

reach
"USP18 reduced basal inflammation, senescence and insulin resistance in coronary endothelial cells."

reach
"USP18 silencing enhanced basal inflammation and senescence."

reach
"USP18 depletion first stimulated differentiation initiation."

reach
"High levels of USP18 in murine hematopoietic cells block the cytokine induced terminal differentiation of monocytic cells (Liu et al., 1999)."

reach
"Deficiency of Usp18 reduced Th17 cell differentiation in vitro and in vivo as a result of hyperactivated NF-kappaB and NFAT signaling and increased levels of IL-2."
USP18 affects breast cancer growth
| 3
USP18 activates breast cancer growth. 3 / 3
| 3

eidos
"For instance , USP18 was shown to promote breast cancer growth by activating the Skp2 / AKT pathway [ 79 ] ."
| PMC

eidos
"For instance , Tan et al. found that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT / Skp2 pathway [ 19 ] ."

eidos
"Tan et al. have demonstrated that USP18 promotes breast cancer growth by upregulating EGFR and activating the AKT / Skp2 pathway ."
USP18 affects Ubiquitin
| 3

sparser
"In contrast, no binding of USP18 to the respective Ub probe45 was observed (Fig. 2b)."

sparser
"In contrast, no binding of USP18 to the respective Ub probe xref was observed ( xref )."

sparser
"Our results clearly show that USP18 exhibits no reactivity towards ubiquitin in vitro indicating/demonstrating that the described inhibition of the NF-κB pathway by USP18 is rather an indirect effect and not mediated by direct interaction between USP18 and ubiquitin."
USP18 affects USP41
3 |
3 |

No evidence text available

No evidence text available

No evidence text available
USP18 affects USP25
| 3
USP18 activates USP25. 3 / 3
| 3

reach
"In addition, USP18-mediated deISGylation in vitro is approximately 40-fold faster than deISGylation by the cross-reactive deubiquitinating enzymes (DUB) USP21 [15] raising the question whether deISGylation by Ub/ISG15 cross-reactive DUBs is relevant in vivo.Despite enhanced ISGylation, mice homozygous for USP18-C61A (USP18 ) are healthy and display a normal lifespan [27]."

reach
"In addition, USP18-mediated deISGylation in vitro is approximately 40-fold faster than deISGylation by the cross-reactive deubiquitinating enzymes (DUB) USP21 [15] raising the question whether deISGylation by Ub/ISG15 cross-reactive DUBs is relevant in vivo.Despite enhanced ISGylation, mice homozygous for USP18-C61A (USP18C61A/C61A) are healthy and display a normal lifespan [27]."

reach
"Moreover, USP17 is a positive regulator of RORgammat in Th17 cells, whereas USP18 has been reported to modulate T cell activation and Th17 cell differentiation by deubiquitinating of the TAK1 and TAB1 complex [XREF_BIBR] and USP25 has been regarded as a negative regulator of IL-17-mediated inflammation via TRAF5 and TRAF6 deubiquitination [XREF_BIBR]."
USP18 affects UBA7
| 2 1
USP18 activates UBA7.
| 2
USP18 activates UBA7. 2 / 2
| 2

reach
"Subsequently, we also show that ISG15, but not USP18 and IL-6, induces UBA7, UBE2L6, and HERC5 genes via further downstream activation of STAT1."

reach
"These findings is consistent with previous studies in which all-trans-retinoic acid (RA) promotes the transcription of ISG15, USP18, and ISGylation activating enzyme UBE1L in RA sensitive but not resistant leukemia cells [XREF_BIBR]."
USP18 binds UBA7.
| 1

sparser
"Our results indicate that E3 ligases, UBA1 and USP18 are associated with HCC development and may possibly be considered as targets in the treatment of HCC."
USP18 affects Protease
| 3
| 3

reach
"A novel interferon stimulated gene encoding a 43-kDa ubiquitin specific protease, designated ISG43, was identified in this screen."

reach
"The IFN stimulated gene ubiquitin specific proteinase 18 (USP18) encodes a protein that negatively regulates T1 IFN signaling via stearic inhibition of JAK1 recruitment to the IFN-alpha receptor 2 subunit (IFNAR2)."

reach
"The IFN-stimulated gene ubiquitin specific proteinase 18 (USP18) encodes a protein that negatively regulates T1 IFN signaling via stearic inhibition of JAK1 recruitment to the IFNα receptor 2 subunit (IFNAR2)."

eidos
"Moreover , we found that USP18 promoted pancreatic cancer progression via upregulation of Notch-1-dependent c-Myc ."

eidos
"Overall , these results demonstrated that USP18 contributes to the progression of pancreatic cancer and is dependent on the Notch1 / c-Myc signalling pathway ( Figure 7G ) ."

eidos
"USP18 contributes to the progression of pancreatic cancer through enhancing the Notch1-c-Myc axis USP18 has been reported to interact with different substrates to exert its effects [ 16-18 ] ."
USP18 affects ITGAX
| 3
USP18 activates ITGAX. 3 / 3
| 3

reach
"However, it should be noted that in this study, USP18 expression in tumor cells not only affected tumor cell activity, but also regulated immune cells in tumor microenvironment in that tumor cell USP18 expression also activated CD11c + dendritic cells residing in the tumor."

reach
"In GM-CSF-supplemented culture, over-expression of Usp18 restored the development of CD11b + CD11c + cells in Usp18 deficient BM cells, but did not affect DC development in wild-type BM cells (XREF_FIG), which confirmed the notion that the development defect of BM-DCs is intrinsic to Usp18 deficient cells."

reach
"Only virus infection, supported by the Usp18 driven enforced virus replication process in CD11c + APCs is efficient in breaking immunologic tolerance to pancreatic islet cells in our model."
USP18 affects ITGAM
| 3
USP18 activates ITGAM.
| 2
USP18 activates ITGAM. 2 / 2
| 2

reach
"Usp18 promotes conventional CD11b + dendritic cell development."

reach
"In GM-CSF-supplemented culture, over-expression of Usp18 restored the development of CD11b + CD11c + cells in Usp18 deficient BM cells, but did not affect DC development in wild-type BM cells (XREF_FIG), which confirmed the notion that the development defect of BM-DCs is intrinsic to Usp18 deficient cells."
USP18 inhibits ITGAM.
| 1
USP18 inhibits ITGAM. 1 / 1
| 1

reach
"Indeed, lack of Usp18 expression reduces the number of CD11b + dendritic cells by 50% XREF_BIBR."
USP18 affects ISGs
| 2 1
USP18 activates ISGs.
| 2
USP18 activates ISGs. 2 / 2
| 2

eidos
"Silencing the expression of ISG15 or USP18 expression restored STAT1 phosphorylation ( Fig. 5D ) and ISGs expression ( Fig. 5E ; Supplementary Fig. 7A ) upon exogenous IFN-alpha treatment ."

eidos
"Therefore , USP18 and / or ISG15 depletion results in prolonged type I IFN signaling and enhanced levels of ISGs [ 30 ] ."
USP18 phosphorylates ISGs.
| 1
Modified USP18 leads to the phosphorylation of ISGs on E5. 1 / 1
| 1

reach
"Silencing the expression of ISG15 or USP18 expression restored STAT1 phosphorylation (Fig. 5D) and ISGs expression (Fig. 5E; Supplementary Fig. 7A) upon exogenous IFN-α treatment."
USP18 affects IL10
| 2
USP18 inhibits IL10. 2 / 3
| 2

reach
"Supporting this hypothesis, we show that USP-18, a target of IRF-7 and known negative regulator of the type I interferon response, decreases the production of immune-regulatory cytokines IL-27 and IL-10."

reach
"We show that IRF-7 siRNA knockdown enhanced LPS induced IL-10 production in human monocyte derived macrophages, and USP-18 overexpression attenuated LPS induced production of IL-10 in RAW264.7 cells."
USP18 affects IFNB1
| 3
USP18 inhibits IFNB1. 3 / 3
| 3

reach
"In this screening, USP18 and USP21 significantly inhibited RIG-I-CARD-induced IFN-beta reporter activity, whereas other USPs had no effect or fewer effects (XREF_FIG)."

reach
"6 In turn, USP18 inhibits IFN-β signaling."

reach
"6 In turn, USP18 inhibits IFN-beta signaling."
USP18 affects DGCR2
| 3
| 3

sparser
"In conclusion, decreased expressions of USP18 and DGCR2 were significantly associated with longer cancer-specific survival, and also the combination of two genes was correlated to a longer survival for MIBC patients."

sparser
"In conclusion, decreased expressions of USP18 and DGCR2 were significantly associated with a longer rate of cancer-specific survival, and also the combination of these two genes was correlated with longer survival rates in MIBC."

sparser
"Longer cancer-specific survival is associated with decreased expression of USP18 with or without the expression of the DGCR2 gene. xref "
| 1 2
| 1 2

reach
"Consistent with these findings, Colony forming assays also showed that USP18 knockdown decreased the cell viability of BxPC-3 cells, whereas overexpression of USP18 increased the cell viability of SW1990 cells (XREF_FIG and XREF_FIG)."

reach
"The results showed that knockdown of USP18 reduced cell viability and ovarian cancer proliferation."

eidos
"The results showed that knockdown of USP18 reduced cell viability and ovarian cancer proliferation ."
USP18 affects CARD11
1 | 2
1 | 2

No evidence text available

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."

reach
"In overexpression and co-immunoprecipitation assays, USP18 interacted with TAB1 and CARMA1 but not with NEMO constitutively (XREF_FIG and not depicted)."
STAT2 affects Interferon
| 3
| 2

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [107]."

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [ xref ]."

sparser
"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
IFNAR1 affects USP18
| 1 2
IFNAR1 binds USP18.
| 2
| 2

sparser
"Their study showed that USP18 does not interact with IFNAR1, but with Box1-Box2 region of IFNAR2 to disrupt its interaction with JAK to inhibit JAK’s tyrosine kinase activity in a DUB activity independent manner [ xref ]."

sparser
"Their study showed that USP18 does not interact with IFNAR1, but with Box1-Box2 region of IFNAR2 to disrupt its interaction with JAK to inhibit JAK’s tyrosine kinase activity in a DUB activity independent manner [44]."
IFNAR1 increases the amount of USP18.
| 1
IFNAR1 increases the amount of USP18. 1 / 1
| 1

reach
"Puromycin resistant clones were screened by PCR andF I G U R E 3 IFNAR blocking inhibits HIV-1 replication and blocks HIV-1-induced USP18 expression in MDMs."
DGCR2 affects USP18
| 3
| 3

sparser
"In conclusion, decreased expressions of USP18 and DGCR2 were significantly associated with longer cancer-specific survival, and also the combination of two genes was correlated to a longer survival for MIBC patients."

sparser
"In conclusion, decreased expressions of USP18 and DGCR2 were significantly associated with a longer rate of cancer-specific survival, and also the combination of these two genes was correlated with longer survival rates in MIBC."

sparser
"Longer cancer-specific survival is associated with decreased expression of USP18 with or without the expression of the DGCR2 gene. xref "
CARD11 affects USP18
1 | 2
1 | 2

No evidence text available

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."

reach
"In overexpression and co-immunoprecipitation assays, USP18 interacted with TAB1 and CARMA1 but not with NEMO constitutively (XREF_FIG and not depicted)."
3 |
17beta-estradiol increases the amount of USP18. 3 / 3
3 |

No evidence text available

No evidence text available

No evidence text available
2 |
Valproic acid increases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
Type-III IFNs affects USP18
| 2
Type-III IFNs activates USP18. 2 / 2
| 2

eidos
"USP18 is induced by type-I and type-III IFNs , but specifically binds to the ICD of IFNAR2 and disrupts IFNalpha-mediated IFNAR1 / IFNAR2 complex formation ."

eidos
"USP18 is induced by type-I and type-III IFNs , but specifically binds to the ICD of IFNAR2 and disrupts IFNa-mediated IFNAR1 / IFNAR2 complex formation ."
Toluene affects USP18
2 |
Toluene increases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
2 |
Titanium dioxide increases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
Same doses affects USP18
| 2
Same doses activates USP18. 2 / 2
| 2

eidos
"We observed that neither IFN-alpha , LPS , nor TNF-alpha induce much , if any , hepatocyte expression of IFN-alpha or IFN-gamma , although the same doses induce strong expression of USP18 ( Fig. 5 ) ."

eidos
"We observed that neither IFN - , LPS , nor TNF - induce much , if any , hepatocyte expression of IFN - or IFN - , although the same doses induce strong expression of USP18 ( Fig. 5 ) ."
1 | 1
Progesterone increases the amount of USP18. 2 / 2
1 | 1

No evidence text available

reach
"Progesterone (P 4 ), estradiol (E 2 ), and IFNT significantly stimulated USP18 expression in goat endometrial epithelial cells (gEECs) cultured in vitro."
Plasmid transfection affects USP18
| 2
Plasmid transfection inhibits USP18. 2 / 2
| 2

eidos
"The level of USP18 was up-regulated by plasmid transfection and down-regulated by siRNA transfection in Hela cells ."

eidos
"USP18 expression levels were up-regulated by plasmid transfection or inhibited by specific small interference RNA ( siRNA ) , and the effect of USP18 on the replication of DENV-2 was examined in the presence or absence of IFN-alpha both at mRNA and protein level ."
2 |
Pentachlorophenol increases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
MiR-191-5p affects USP18
| 2
MiR-191-5p activates USP18. 2 / 2
| 2

reach
"Thus, the targeting of USP18 by miR-191-5p, miR-24-3p, and miR-532-3p, and possibly miR-423-5p, may assist the priming of monocytes toward a robust inflammatory and immune response."

reach
"Altogether these data demonstrate that the USP18 3 ' UTR sequence can be directly targeted by miR-191-5p, miR-24-3p, miR-423-5p, and miR-532-3p, with an effect on USP18 abundance."
Bisphenol A affects USP18
2 |
Bisphenol A increases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
Bis(2-ethylhexyl) phthalate increases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
Affinity IFNAR1 affects USP18
| 2
Affinity IFNAR1 inhibits USP18. 2 / 2
| 2

eidos
"The reason for this differential refractoriness is that the high affinity of IFNbeta for IFNAR1 still allows formation of ternary complexes even in the presence of USP18 , which is not the case for IFNalpha2 due to its lower affinity to IFNAR1 ."

eidos
"The reason for this differential refractoriness is that the high affinity of IFNb for IFNAR1 still allows formation of ternary complexes even in the presence of USP18 , which is not the case for IFNa2 due to its lower affinity to IFNAR1 ."
ZEB1 affects USP18
| 1 1
| 1 1

sparser
"Mechanistic investigations revealed that USP18 directly bound ZEB1 and decreased its ubiquitination to enhance the protein stability of ZEB1 in ESCC cells."

reach
"Mechanistic investigations revealed that USP18 directly bound ZEB1 and decreased its ubiquitination to enhance the protein stability of ZEB1 in ESCC cells."
USP18 affects translation
| 1 1
| 1 1

reach
"This suggests that depletion of Usp18 inhibited EGFR mRNA translation."

sparser
"This suggests that depletion of Usp18 inhibited EGFR mRNA translation."
USP18 affects transforming growth factor-beta-activated kinase TAK1
| 2
USP18 activates transforming growth factor-beta-activated kinase TAK1. 2 / 2
| 2

eidos
"Ubiquitin specific peptidase 18 ( USP18 ) , a deubiquitinating enzyme , has been shown to modulate transforming growth factor-beta-activated kinase 1 ( TAK1 ) activity ."

eidos
"Ubiquitin-specific peptidase 18 ( USP18 ) , a deubiquitinating enzyme , has been shown to modulate transforming growth factor-beta-activated kinase 1 ( TAK1 ) activity ."

reach
"Knockdown of USP18 represses the transcription factor PML and RARalpha and inhibits growth of acute promyelocytic leukaemia [24]."

reach
"Silencing USP18 prolongs the phosphorylated state of signal transducer and activator of transcription 1 (STAT1) and enhances the expression of ISGs in response to IFN-alpha [XREF_BIBR]."
USP18 affects signaling independent enzymatic
| 2
USP18 inhibits signaling independent enzymatic. 2 / 2
| 2

eidos
"These results are consistent with there being no role for ISGylation ( and , thus , for the ability of USP18 to strip ISG15 from its protein conjugates ) in the ability of TNF-alpha and LPS to block type 1 IFN signaling in hepatocytes , and this finding is in agreement with previous data showing that USP18 blocks IFN signaling independent of its enzymatic activity ( 15 ) ."

eidos
"These results are consistent with there being no role for ISGylation ( and , thus , for the ability of USP18 to strip ISG15 from its protein conjugates ) in the ability of TNF - and LPS to block type 1 IFN signaling in hepatocytes , and this finding is in agreement with previous data showing that USP18 blocks IFN signaling independent of its enzymatic activity ( 15 ) ."
USP18 affects responses
| 1 1
USP18 inhibits responses. 2 / 2
| 1 1

sparser
"Inhibition of IFN responses by USP18 is independent of cleavage of ISG15; instead, USP18 binds to IFNAR2 and prevents its association with Jak1 ( xref , xref )."

eidos
"Type 1 IFN responses were partially restored by USP18 knockdown ."
USP18 affects response
| 2
USP18 inhibits response. 2 / 2
| 2

eidos
"Mechanistically , USP18 specifically binds to the IFN-I receptor 2 ( IFNAR2 ) subunit to inhibit Jak / STAT signaling pathway and response to IFN-I ( Malakhova et al ., 2006 ) ."

eidos
"Given that USP18 attenuates the IFN response , we hypothesized that induction of USP18 allowed HIV-1 to achieve the balance needed to provide the necessary STAT signaling , without too strong an antiviral response ."

eidos
"Interestingly , USP18 inhibition promotes the antibacterial effect of TNFalpha and subsequently induces reactive oxygen species ( ROS ) , thereby controlling primary and secondary bacterial infection , which suggests the therapeutic potential of targeting USP18 in patients to ameliorate disease caused by serious bacterial infections ."

reach
"Consistent with our finding that Usp18 Ity9 mice have deregulated autophagy marker expression following Salmonella infection in vivo, we also observed that Usp18 Ity9 macrophages have decreased ROS production after exposure to heat killed Salmonella (XREF_FIG)."
USP18 affects phosphorylation
| 2
USP18 inhibits phosphorylation. 2 / 2
| 2

sparser
"Thus, USP18 and TRIM30α both inhibit RCAN1 phosphorylation and thereby inhibit NFAT activation."

sparser
"In line with this result, expression of aa 36-372, but not aa 51-372, of USP18 inhibited STAT1 phosphorylation upon IFNα treatment ( xref )."
USP18 affects phosphorylated STAT1
| 2
USP18 inhibits phosphorylated STAT1. 2 / 2
| 2

eidos
"We observed knockdown of USP18 significantly increased the phosphorylated level of STAT1 ( p-STAT1 ) after 30 min treatment of IFN-alpha compared with the Nc group ( Figure 5A ) ."

eidos
"56 Mechanistically , these studies showed that USP18 deficiency resulted in increased ISGylation of proteins and increased phosphorylated STAT1 levels in response to LPS treatment or viral infection ."
USP18 affects pSTAT1
| 2
USP18 inhibits pSTAT1. 2 / 2
| 2

eidos
"Of note , USP18 knockdown did not increase pSTAT1 in response to IFN-alpha before 24 h ; these findings are consistent with previous observations ( 12 ) ."

eidos
"Of note , USP18 knockdown did not increase pSTAT1 in response to IFN - before 24 h ; these findings are consistent with previous observations ( 12 ) ."
USP18 affects negative regulatory signaling
| 2
USP18 activates negative regulatory signaling. 2 / 2
| 2

eidos
"USP18 was shown to bind to IFNAR2 and attenuate the JAK-STAT pathway , thereby negatively regulating IFN signaling ( Table 1 ) .223 Reduced USP18 expression results in increased antiviral activity against many viruses , such as SINV , hepatitis B virus and VSV , in USP18 knockout mice.218 ,223,224,225 USP18 knockdown is concomitant with increased cellular protein ISGylation , prolonged STAT1 tyrosine phosphorylation and enhanced ISG expression , thus greatly enhancing the anti-HCV potency of IFN.226 All these studies suggest that USP18 disruption can impede its negative regulatory effect on IFN signaling , resulting in sustained JAK-STAT activity and antiviral activity ."

eidos
"226 All these studies suggest that USP18 disruption can impede its negative regulatory effect on IFN signaling , resulting in sustained JAK-STAT activity and antiviral activity ."
USP18 affects migration ovarian cancer cells
| 2
USP18 activates migration ovarian cancer cells. 2 / 2
| 2

eidos
"USP18 contributes to the proliferation and migration of ovarian cancer cells by regulating the AKT / mTOR signaling pathway ."

eidos
"In conclusion , USP18 promoted the proliferation and migration of ovarian cancer cells by activating AKT / mTOR signaling ."

eidos
"The net consequence of this is that elevated levels of USP18 promoted lipolysis and increased fatty acid oxidation that augmented lung cancer growth ."

eidos
"This study reports the previously unrecognized finding that increased USP18 activity promotes lipolysis and fatty acid oxidation by stabilizing both adipose triglyceride lipase ( ATGL ) and Uncoupling Protein 1 ( UCP1 ) ."
USP18 affects in-membrane dissociation ternary complex
| 2
USP18 activates in-membrane dissociation ternary complex. 2 / 2
| 2

eidos
"USP18 effectively increases the in-membrane dissociation of ternary complex , and the much weaker receptor binding strength of IFNalpha2 as compared to IFNbeta leads to a greater inhibitory effect on the IFNalpha2 response , thus generating a difference in the pSTATmax between these IFNs ( Section Long Time Deactivation via USP18 Regulates Receptor Complex Stability to Achieve Absolute Discrimination ) ."

eidos
"USP18 effectively increases the in-membrane dissociation of ternary complex , and the much weaker receptor binding strength of IFNa2 as compared to IFNb leads to a greater inhibitory effect on the IFNa2 response , thus generating a difference in the pSTAT max between these IFNs ( Section Long Time Deactivation via USP18 Regulates Receptor Complex Stability to Achieve Absolute Discrimination ) ."
USP18 affects deconjugation USP15 target proteins
| 2
USP18 activates deconjugation USP15 target proteins. 2 / 2
| 2

eidos
"The deconjugation of USP15 from its target proteins is catalyzed by USP18 ( mouse ortholog UBP43 ) ."

eidos
"The deconjugation of USP15 from its target proteins is catalyzed by USP18 ( mouse ortholog UBP43 ) .222 USP18 can function in both ISG15-dependent and ISG15-independent modes ."
USP18 affects conjugation
| 2
| 2

reach
"Conjugation of ISG15 to various cellular substrates is reversed by the IFN-inducible isopeptidase USP18."

reach
"ISG15 conjugation (ISGylation) can be reversed by the IFN-a/b-induced isopeptidase (USP18) that cleaves ISG15 from target proteins 4 ."
USP18 affects cell death
| 2
| 2

reach
"USP18 inhibition also increased apoptotic cell death by nearly 4-fold in primary rat beta cells after 48h of treatment with IFNalpha (XREF_FIG)."

reach
"In line with this hypothesis, double knockdown of USP18 and DP5, PUMA or Bim protects against USP18 knockdown induced beta cell death."
| 2

eidos
"223 Reduced USP18 expression results in increased antiviral activity against many viruses , such as SINV , hepatitis B virus and VSV , in USP18 knockout mice ."

eidos
"USP18 was shown to bind to IFNAR2 and attenuate the JAK-STAT pathway , thereby negatively regulating IFN signaling ( Table 1 ) .223 Reduced USP18 expression results in increased antiviral activity against many viruses , such as SINV , hepatitis B virus and VSV , in USP18 knockout mice.218 ,223,224,225 USP18 knockdown is concomitant with increased cellular protein ISGylation , prolonged STAT1 tyrosine phosphorylation and enhanced ISG expression , thus greatly enhancing the anti-HCV potency of IFN.226 All these studies suggest that USP18 disruption can impede its negative regulatory effect on IFN signaling , resulting in sustained JAK-STAT activity and antiviral activity ."
USP18 affects ZEB1
| 1 1
| 1 1

sparser
"Mechanistic investigations revealed that USP18 directly bound ZEB1 and decreased its ubiquitination to enhance the protein stability of ZEB1 in ESCC cells."

reach
"Mechanistic investigations revealed that USP18 directly bound ZEB1 and decreased its ubiquitination to enhance the protein stability of ZEB1 in ESCC cells."
USP18 affects TP53
| 2
USP18 activates TP53. 2 / 2
| 2

reach
"In a positive feedback loop, the ISG15 conjugation system is also upregulated by p53 ISGylation to further potentiate p53 transactivity and downregulated by USP18 mediated deISGylation of p53."

reach
"In functional studies, depletion of Usp18 could stimulate the p53 and caspase 3 protein levels."
USP18 affects TNF
| 1
USP18 activates TNF. 1 / 2
| 1

reach
"As these two signals have been thought to have counter-regulatory roles in psoriasis (39), lower USP18 might promote higher IFN response and thus lower TNF dependence, and vice versa, agreeing with the positive correlation with PASI improvement we observed during the course of etanercept treatment."
USP18 affects TIFAB
| 2
USP18 inhibits TIFAB. 2 / 2
| 2

reach
"A majority of these genes are responsible for the regulation and control of early innate inflammation, such as USP18, which disrupts the JAK-STAT pathway downstream of the IFN receptor (43) , and TIFAB, which inhibits the activation of the NF-k B pathway (44) ."

reach
"A majority of these genes are responsible for the regulation and control of early innate inflammation, such as USP18, which disrupts the JAK-STAT pathway downstream of the IFN receptor (43), and TIFAB, which inhibits the activation of the NF-κB pathway (44)."
USP18 affects TCR
| 1
USP18 inhibits TCR. 1 / 2
| 1

reach
"Taken together, USP18 downregulates IL-2 synthesis and TCR induced T cell proliferation [XREF_BIBR]."
USP18 affects TAK1-TAB1
| 1
USP18 inhibits TAK1-TAB1. 1 / 2
| 1

reach
"Co-expression of USP18 but not USP18 (C61S) potently abolished the polyubiquitination modification of TAK1-TAB1 (XREF_FIG)."
USP18 affects TAB2
1 | 1
1 | 1

No evidence text available

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."
USP18 affects Refractory
| 2
| 2

eidos
"However , we have also found that USP18 is necessary but not sufficient on its own to induce an IFN - refractory state ( 53 ) ."

eidos
"It was shown that USP18 is responsible to induce this refractory state as USP18-deficient mice ( FVB background ) and cells do exhibit this kind of desensitisation after repeated injections of IFNalpha [ 5,46 ] ."
USP18 affects RELA
| 2
USP18 inhibits RELA. 2 / 2
| 2

reach
"Here, we found that ectopic expression of USP18 suppressed nuclear accumulation of p65 as well as NF-kappaB activation by LPS treatment."

reach
"Consistent with these results, we found that knockdown of USP18 enhanced NF-kappaB-luc activity induced by TNF-alpha, LPS, MyD88, TRAF6, TAK1-TAB1, IKKbeta, but not p65 (XREF_FIG)."
USP18 affects RCAN1
| 2
USP18 leads to the dephosphorylation of RCAN1. 2 / 2
| 2

reach
"Thus, USP18 and TRIM30alpha both inhibit RCAN1 phosphorylation and thereby inhibit NFAT activation.Usp18 upregulation in Rspo3- and Evi-iECKO lung EC was validated by RT-qPCR."

reach
"USP18 de-ubiquitinates TAK1, thereby blocking phosphorylation of RCAN1, an inhibitor of calcineurin."
USP18 affects PyVmT
| 2
USP18 activates PyVmT. 2 / 2
| 2

reach
"To test this hypothesis we treated vector control and Usp18 rescued PyVmT and Usp18 KO MECs with IFN-lambda for 30 h and determined transcript levels of the same genes analyzed in XREF_FIG by qRT-PCR."

reach
"In contrast, injection of PyVmT and Usp18 KO MECs transduced with control vector led to significantly impaired tumour growth compared to Usp18 rescued PyVmT and Usp18 KO MECs or Usp18 C61S mutant rescued PyVmT and Usp18 KO MECs (XREF_FIG)."
USP18 affects Neoplasms
| 1
| 1

reach
"USP18 promotes tumor metastasis in esophageal squamous cell carcinomas via deubiquitinating ZEB1."
USP18 affects NFATC2
| 1
USP18 inhibits NFATC2. 1 / 2
| 1

reach
"Likewise, USP18 and TRIM5alpha inhibited NFAT1 activation."
USP18 affects Mice
| 2
USP18 inhibits Mice. 2 / 2
| 2

reach
"In addition, USP18 overexpression dramatically prevented focal cerebral I/R injury in mice through suppressing microglial activation and inflammation [21]."

reach
"USP18 inhibits osteoclastogenesis in mice [77]."
USP18 affects MX2
| 2
USP18 decreases the amount of MX2. 2 / 2
| 2

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."
USP18 affects MTOR
| 2
USP18 activates MTOR. 2 / 2
| 2

reach
"USP18 contributes to the proliferation and migration of ovarian cancer cells by regulating the AKT/mTOR signaling pathway."

reach
"In conclusion, USP18 promoted the proliferation and migration of ovarian cancer cells by activating AKT/mTOR signaling."
USP18 affects LPS-induced sepsis
| 2
USP18 activates LPS-induced sepsis. 2 / 2
| 2

eidos
"USP18 alleviated LPS-induced sepsis by inhibiting TAK1 activity ."

eidos
"USP18 alleviated LPS-induced sepsis by inhibiting TAK1 activity ."
USP18 affects IRS2
| 2
USP18 binds IRS1 and IRS2. 2 / 2
| 2

sparser
"And in this study, we found that IRS4 functioned as a novel USP18-binding protein, but IRS1 and IRS2 do not bind to USP18."

sparser
"Therefore, IRS1 and IRS2 did not interact with USP18 (Figure xref )."
USP18 affects IRF3
| 2
USP18 inhibits IRF3. 2 / 2
| 2

reach
"USP18 deficiency or knockdown of USP20 resulted in enhanced K48 linked ubiquitination and accelerated degradation of STING, and impaired activation of IRF3 and NF-kappaB as well as induction of downstream genes after infection with DNA virus HSV-1 or transfection of various DNA ligands."

reach
"XREF_BIBR This study showed that USP18 or USP20 deficiency significantly inhibited HSV-I or cytosolic DNA activation of both NF-kappaB and IRF3, and type-I IFN and proinflammatory cytokine expression."
USP18 affects IL27
| 1
USP18 inhibits IL27. 1 / 2
| 1

reach
"Supporting this hypothesis, we show that USP-18, a target of IRF-7 and known negative regulator of the type I interferon response, decreases the production of immune-regulatory cytokines IL-27 and IL-10."
USP18 affects IFNs
| 2
USP18 activates IFNs. 2 / 2
| 2

reach
"Therapeutically, USP18 represents an attractive target, with agonists being of use in clinical settings where there is overabundance of type I IFNs and USP18 antagonists acting to prolong the beneficial effects of therapeutic IFNs, as in multiple sclerosis, hairy cell leukemia, and melanoma."

reach
"Alternatively, USP18 antagonists or strategies promoting USP18 degradation could promote the beneficial effect of therapeutic IFNs used in multiple sclerosis, hairy cell leukemia, and melanoma (Meuwissen et al., 2016)."
USP18 affects IFNLR
| 2
USP18 activates IFNLR. 2 / 2
| 2

reach
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR (81)."

reach
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR."
USP18 affects IFNG
| 2
USP18 inhibits IFNG. 2 / 2
| 2

reach
"USP18 inhibition by two independent siRNAs increased beta cell apoptosis following exposure to IFNalpha or IFNgamma (XREF_FIG), whereas siCTRL has no such effect."

reach
"The absence of Usp18 limited the expansion of virus specific CD8 + T cells (XREF_FIG) and reduced IFN-gamma production by CD8 + T cells (XREF_FIG) and CD4 + T cells (XREF_FIG)."
USP18 affects IFITM2
| 2
USP18 decreases the amount of IFITM2. 2 / 2
| 2

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."
USP18 affects IFITM1
| 2
USP18 decreases the amount of IFITM1. 2 / 2
| 2

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."
USP18 affects IFIT3
| 2
USP18 decreases the amount of IFIT3. 2 / 2
| 2

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."
USP18 affects IFIT2
| 2
USP18 decreases the amount of IFIT2. 2 / 2
| 2

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."
USP18 affects IFIT1
| 2
USP18 decreases the amount of IFIT1. 2 / 2
| 2

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."
USP18 affects Hepatitis C
| 2
| 2

eidos
"IFN-lambda4 potently blocks IFN-alpha signalling by ISG15 and USP18 in hepatitis C virus infection ."

eidos
"IFN-lambda4 potently blocks IFN-alpha signalling by ISG15 and USP18 in hepatitis C virus infection OPEN ."
USP18 affects Flag
| 2
USP18 binds IRS4 and Flag. 2 / 2
| 2

sparser
"Co-IP assay of the interaction of Flag-tagged deletion mutants of USP18 and endogenous IRS4 confirmed these observations (Figure xref )."

sparser
"Moreover, Co-IP assay of the interaction of Flag-tagged deletion mutants of IRS4 with endogenous USP18 confirmed these results (Figure xref )."
USP18 affects FBXO6
| 2
| 2

sparser
"The USP18-FBXO6 axis maintains the malignancy of ovarian cancer."

sparser
"In summary, our results indicate that USP18 is a downstream target gene of STAT3, and the USP18-FBXO6 axis might be a promising therapeutic target for OV."
USP18 affects F3
| 2
| 2

sparser
"To assure interaction of USP18 with TF, which forms a large hydrophobic cradle, we introduced a long flexible linker consisting of six GSS repeats between USP18 and the chaperone (Figure xref B, C)."

sparser
"In order to reduce binding of the TF-USP18 fusion protein to the ribosome and facilitate dissociation, residues G43, F44 and R45 of TF were exchanged to alanine (TF AAA )."
USP18 affects DENV-2
| 2
USP18 activates DENV-2. 2 / 2
| 2

reach
"USP18 overexpression promoted DENV-2 replication, while USP18 silence inhibited DENV-2 replication."

reach
"Ye et al. (2021) demonstrated that DENV-2 infection increased USP18 expression; USP18 overexpression enhanced DENV-2 replication, while USP18 silencing inhibited DENV-2 replication by activating the IFN-α-mediated JAK/STAT signaling pathway."
USP18 affects DDX58
| 2
USP18 inhibits DDX58. 2 / 2
| 2

reach
"Immunofluorescence analysis using specific dsRNA antibodies showed a significant and time-dependent accumulation of dsRNA in the USP18 KO cells after IFN treatment, indicating that USP18-dependent ISGylation under these conditions could inhibit ADAR activity.In addition to ADAR, PKR, RIG-I and MDA5, we found other proteins involved in antigen presentation and resistance to immunotherapy, such as TAP1, GBP1, STAT1, IFIT1, PSMB10, PSMB9, GBP2, MAGE and PARP14, also regulated by USP18-dependent ISGylation."

reach
"It would be interesting to know if duck USP18 can negatively regulate RIG-I signaling by removing the K63-linked ubiquitin chains furnished by TRIM25."
USP18 affects Chemokine
| 2
| 2

reach
"Further studies show that the expression of USP18 by beta islet cells themselves is important for inhibiting diabetes.75, 76 On the one hand, the upregulation of USP18 expression by IFN-I in beta islet cells prevents the activity of proinflammatory chemokines such as CCL5, CXCL10, and IL-15 and consequently inhibits insulitis."

reach
"75, 76 On the one hand, the upregulation of USP18 expression by IFN-I in beta islet cells prevents the activity of proinflammatory chemokines such as CCL5, CXCL10, and IL-15 and consequently inhibits insulitis."
USP18 affects CXCL9
| 2
USP18 decreases the amount of CXCL9. 2 / 2
| 2

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN-. Many of these genes have been previously shown to restrict HIV-1 replication."

reach
"We demonstrated that USP18 deficient cells have increased expression of IFIT1, IFIT2, IFIT3, IFITM1, IFITM2, CXCL9, CXCL10, ISG15, and MX2 after treatment with exogenous IFN‐β."
USP18 affects CGAS
| 1 1
USP18 inhibits CGAS. 2 / 2
| 1 1

reach
"Consistent with our siRNA data implicating the cGAS pathway, the relative expression of ISGs Usp18, Isg15, and Cxcl10 was markedly reduced in the absence of STING (Fig. 2B), with this effect being more pronounced in CLPP-KO/IFNAR-KO MEFs."

eidos
"Mechanistically , USP18 reduced cGAS degradation by decreasing its K48-linked ubiquitination to promote IAV-induced cGAS-STING pathway activation ."
USP18 affects BCL2L11
| 2
USP18 decreases the amount of BCL2L11. 2 / 2
| 2

reach
"Specifically, USP18 inhibition in INS-1E cells enhanced BIM expression level in untreated and IFNgamma treated conditions."

reach
"XREF_BIBR, XREF_BIBR, XREF_BIBR USP18 inhibition in INS-1E cells induced Bim expression in untreated and IFNalpha treated conditions (XREF_FIG), whereas DP5 (XREF_FIG) and PUMA (XREF_FIG) mRNA expression was significantly upregulated when USP18 silenced cells were exposed to IFNalpha."
USP18 affects Arg151
| 2
USP18 binds ISG15 and Arg151. 2 / 2
| 2

reach
"A structural overlay of unbound USP18 and the USP18ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short α-helix of unbound USP18 (Fig. 3b)."

reach
"A structural overlay of unbound USP18 and the USP18 and ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short alpha-helix of unbound USP18 (XREF_FIG)."
| 2

reach
"Suppression of USP18 Potentiates the Anti-HBV Activity of Interferon Alpha in HepG2.2.15 Cells via JAK and STAT Signaling."

reach
"Correction : Suppression of USP18 Potentiates the Anti-HBV Activity of Interferon Alpha in HepG2.2.15 Cells via JAK and STAT Signaling."
TLR4 affects USP18
| 2
TLR4 activates USP18. 2 / 2
| 2

reach
"We similarly observed the rapid upregulation of USP18 after treatment with IFN-beta In addition, we found USP18 is upregulated by TLR2, TLR4, and TLR7/8 ligands in THP-1 cells."

reach
"The LPS mediated TLR4 activation in human macrophages upregulates USP18, which in turn inhibits NF-kappaB activation, and thus the secretion of proinflammatory cytokines (TNF-alpha, IL-6, and IL-1beta) via interacting with TAK1-TAB1 and IKKalpha and beta-NEMO complexes [193]."
| DOI
TLR4 activation human macrophages affects USP18
| 2
TLR4 activation human macrophages activates USP18. 2 / 2
| 2

eidos
"The LPS-mediated TLR4 activation in human macrophages upregulates USP18 , which in turn inhibits NF-kappaB activation , and thus the secretion of proinflammatory cytokines ( TNF-alpha , IL-6 , and IL-1beta ) via interacting with TAK1-TAB1 and IKKalpha / beta-NEMO complexes ( Table 2 ) [ 193 ] ."
| DOI

eidos
"The LPS-mediated TLR4 activation in human macrophages upregulates USP18 , which in turn inhibits NF-kappaB activation , and thus the secretion of pro-inflammatory cytokines ( TNF-alpha , IL-6 , and IL-1beta ) via interacting with TAK1-TAB1 and IKKalpha / beta-NEMO complexes ( Table 2 ) [ 193 ] ."
| PMC
TAB2 affects USP18
1 | 1
1 | 1

No evidence text available

reach
"The results indicated that USP18 interacted with TAK1, TAB1, and TAB2 without stimulation and PMA and ion stimulation reduced but did not totally abolish their association, whereas USP18 interacted with CARMA1 weakly in unstimulated cells and PMA and ion stimulation first enhanced their interaction and then resulted in their disassociation (XREF_FIG)."
SKP2 affects SAMHD1
| 2
| 2

sparser
"USP18 formed a complex with the E3 ubiquitin ligase recognition factor SKP2 (S-phase kinase associated protein 2) and SAMHD1."

sparser
"Numerous studies have reported that SAMHD1 can interact with cyclin/CDK complexes ( xref ), USP18 ( xref ) and S-phase kinase-associated protein 2 ( xref ), which are involved in the regulation of cell proliferation ( xref , xref )."
Reperfusion Injury increases the amount of USP18. 2 / 2
| 2

reach
"For example, ischemic reperfusion injury upregulates USP18 expression in the liver and induces an IFN-α refractory state."

reach
"In vivo, hepatic inflammatory stress (ischemia/reperfusion injury) led to increased hepatic USP18 gene expression that was associated with poor control of LCMV infection."

reach
"For example, inflammatory stimuli, e.g., endotoxin and lipopolysaccharide (LPS), have been shown to upregulate USP18 in peritoneal exudate macrophages (18)."

reach
"For example, inflammatory stimuli, e.g., endotoxin and lipopolysaccharide (LPS), have been shown to upregulate USP18 in peritoneal exudate macrophages."
JAK-STAT affects USP18
| 2
JAK-STAT activates USP18. 2 / 2
| 2

reach
"USP18 is induced by JAK-STAT signaling, and the resulting protein product then competes with JAK1 for binding to the intracellular domain of IFNAR2 [XREF_BIBR]."

reach
"In the initial experiments demonstrating IFN desensitization, ISGF3 gel shift assays and STAT1 phosphorylation levels indicated that the presence of IFN-beta failed to result in prolonged JAK-STAT signaling in USP18 expressing cells; in contrast, signaling was maintained in Usp18 -/- cells."
Ischemia affects USP18
| 2
Ischemia increases the amount of USP18. 2 / 2
| 2

reach
"As an in vivo correlate of our in vitro findings, experimentally induced hepatic ischemia/reperfusion injury induced USP18 mRNA expression in liver and enhanced lymphocytic choriomeningitis (LCMV) replication, an effect not seen in USP18−/− mice."

reach
"Error bars represent the SEM for duplicate PCRs.FIG 6: Experimental hepatic ischemia/reperfusion induces USP18 expression and enhances LCMV replication."
Interferon affects STAT2, and USP18
| 2
| 2

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [107]."

sparser
"Two siblings with early onset autoinflammatory disease with neurological features and elevated IFN signature were additionally described with a homozygous missense mutation in STAT2 resulting in gain of activity due to the inability of mutant STAT2 to interact with the STAT2-dependent negative regulator of interferon activity, USP18 [ xref ]."
ISG15 affects Arg151
| 2
USP18 binds ISG15 and Arg151. 2 / 2
| 2

reach
"A structural overlay of unbound USP18 and the USP18ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short α-helix of unbound USP18 (Fig. 3b)."

reach
"A structural overlay of unbound USP18 and the USP18 and ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short alpha-helix of unbound USP18 (XREF_FIG)."
IRS4 affects Flag
| 2
USP18 binds IRS4 and Flag. 2 / 2
| 2

sparser
"Co-IP assay of the interaction of Flag-tagged deletion mutants of USP18 and endogenous IRS4 confirmed these observations (Figure xref )."

sparser
"Moreover, Co-IP assay of the interaction of Flag-tagged deletion mutants of IRS4 with endogenous USP18 confirmed these results (Figure xref )."
IRS2 affects USP18
| 2
USP18 binds IRS1 and IRS2. 2 / 2
| 2

sparser
"And in this study, we found that IRS4 functioned as a novel USP18-binding protein, but IRS1 and IRS2 do not bind to USP18."

sparser
"Therefore, IRS1 and IRS2 did not interact with USP18 (Figure xref )."
IRF9 affects USP18
| 2
IRF9 inhibits USP18. 2 / 2
| 2

reach
"Low dose IFNα increases baseline STAT2 and IRF9 expression without strongly activating the negative feedback regulators SOCS1, SOCS3, and USP18, thereby hypersensitizing cells to further interferon stimulation (26)."

reach
"The same procedure was performed for CRISPR based tagging the additional genes, STAT1, IRF9 and USP18 sequentially.The knockdown of USP18 by shRNA was done using retrovirus transduction."
IFNs affects USP18
| 2
IFNs activates USP18. 2 / 2
| 2

reach
"USP18, a protein of 368 aa in length and an ISG15 isopeptidase, is a negative regulator of type I and III IFN-activated JAK/STAT signaling [142], and is rapidly upregulated by viral infection and IFNs."

reach
"It is notable that both USP18 (Supplementary Figures 3 and 4) and KRT2 were differentially expressed upon TNF stimulation in keratinocytes, and USP18 was also upregulated by IFNs."
IFNalpha/beta affects USP18
| 2
IFNalpha/beta inhibits USP18. 2 / 2
| 2

reach
"Interestingly, the relative ratio of mRNA induction of STAT1 and its targets PLSCR1, HERC6, and USP18 was very similar between MCF-7 cells treated with either IFNalpha and beta or CD95L."

reach
"Interestingly, the relative ratio of mRNA induction of STAT1 and its targets PLSCR1, HERC6 and USP18 was very similar between MCF-7 cells treated with either IFNalpha and beta or CD95L (XREF_FIG)."
IFNLR1 affects IFNAR2
| 2
| 2

sparser
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR ( xref )."

sparser
"Even though type III IFN signaling requires JAK1, it is not affected by USP18 as USP18 specifically targets and binds IFNAR2 and not IFNLR (81)."
IFN receptor affects USP18
| 2
USP18 binds IFN receptor. 2 / 2
| 2

reach
"To exert its function as a negative regulator, USP18 binds to the IFN receptor and JAK complex and attenuates the magnitude of the response."

reach
"Since we have shown that binding of Usp18 to type I IFN receptor subunit 2 (Ifnar2) is important for Usp18 mediated downregulation of type I IFN signalling, we investigated a potential interaction of Usp18 with the IFN-lambda specific receptor subunit IL-28R1."
GRL0617 affects USP18
| 2
GRL0617 inhibits USP18. 2 / 2
| 2

reach
"Importantly, GRL0617 was unable to inhibit HAUSP, USP18, UCH-L1, UCH-L3, and a papain-like protease (PLP2) from the human coronavirus NL63."

reach
"To test whether GRL0617 can inhibit mouse deISGylating enzyme USP18, its activity was assayed in the presence of an inhibitor with 250nM ISG15-AMC (Boston Biochem) as substrate (excitation : 340nm; emission : 450nm)."
GATA3 affects USP18
| 1 1
GATA3 inhibits USP18. 2 / 2
| 1 1

sparser
"Moreover, upstream analysis using ingenuity pathway analysis (IPA) showed that GATA3 modulated the transcription of several innate lymphocyte related genes including activation of CCL5, IL1B, IL-27, IRF7, MAVS, and TNF, whereas GATA3 inhibited BTK, USP18, CNOT7, and SOCS1 ( xref )."

reach
"Moreover, upstream analysis using ingenuity pathway analysis (IPA) showed that GATA3 modulated the transcription of several innate lymphocyte related genes including activation of CCL5, IL1B, IL-27, IRF7, MAVS, and TNF, whereas GATA3 inhibited BTK, USP18, CNOT7, and SOCS1 (Figure 3E)."
Flag affects USP18
| 2
USP18 binds IRS4 and Flag. 2 / 2
| 2

sparser
"Co-IP assay of the interaction of Flag-tagged deletion mutants of USP18 and endogenous IRS4 confirmed these observations (Figure xref )."

sparser
"Moreover, Co-IP assay of the interaction of Flag-tagged deletion mutants of IRS4 with endogenous USP18 confirmed these results (Figure xref )."
Fig. affects USP18
| 2
Fig. increases the amount of USP18. 2 / 2
| 2

reach
"USP18 mRNA expression was induced by TNF-α and LPS but not by IL-6 or IL-10 (Fig. 1A)."

reach
"Like ISG15, the expression of its conjugating enzymes and USP18 is upregulated by IFN (Fig. 1a) ."
FBXO6 affects USP18
| 2
| 2

sparser
"The USP18-FBXO6 axis maintains the malignancy of ovarian cancer."

sparser
"In summary, our results indicate that USP18 is a downstream target gene of STAT3, and the USP18-FBXO6 axis might be a promising therapeutic target for OV."
F3 affects USP18
| 2
| 2

sparser
"To assure interaction of USP18 with TF, which forms a large hydrophobic cradle, we introduced a long flexible linker consisting of six GSS repeats between USP18 and the chaperone (Figure xref B, C)."

sparser
"In order to reduce binding of the TF-USP18 fusion protein to the ribosome and facilitate dissociation, residues G43, F44 and R45 of TF were exchanged to alanine (TF AAA )."
Experimental hepatic ischemia affects USP18
| 2
Experimental hepatic ischemia activates USP18. 2 / 2
| 2

eidos
"Experimental hepatic ischemia / reperfusion induces USP18 expression and enhances LCMV replication ."

eidos
"FIG 6 : Experimental hepatic ischemia / reperfusion induces USP18 expression and enhances LCMV replication ."
2 |
Dietary Fats decreases the amount of USP18. 2 / 2
2 |

No evidence text available

No evidence text available
DENV-2 affects USP18
| 2
DENV-2 increases the amount of USP18. 2 / 2
| 2

reach
"Our data showed that DENV-2 infection increased USP18 expression in Hela cells."

reach
"Ye et al. (2021) demonstrated that DENV-2 infection increased USP18 expression; USP18 overexpression enhanced DENV-2 replication, while USP18 silencing inhibited DENV-2 replication by activating the IFN-α-mediated JAK/STAT signaling pathway."
CLQ affects USP18
| 2
CLQ activates USP18. 2 / 2
| 2

reach
"Moreover, USP18 was also induced in these cell lines by CLQ dependent on the increased concentrations."

reach
"In addition, the de-ISGylation enzyme USP18 was also upregulated by CLQ and MFQ."
BMP6 affects USP18
| 1 1
BMP6 inhibits USP18. 2 / 2
| 1 1

reach
"BMP-6, upregulated in iLCs only after incubation with poly(I:C)-EVs, induces interferon-stimulated genes, down-regulates USP18 (a suppressor of interferon signaling) and induces an immediate exit from the cell cycle in epithelial stem cells, all favorable conditions during viral challenge ."

eidos
"BMP-6 , upregulated in iLCs only after incubation with poly ( I :C ) - EVs , induces interferon-stimulated genes , down-regulates USP18 ( a suppressor of interferon signaling ) and induces an immediate exit from the cell cycle in epithelial stem cells , all favorable conditions during viral challenge33 , 36 ."
Arg151 affects USP18
| 2
USP18 binds ISG15 and Arg151. 2 / 2
| 2

reach
"A structural overlay of unbound USP18 and the USP18ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short α-helix of unbound USP18 (Fig. 3b)."

reach
"A structural overlay of unbound USP18 and the USP18 and ISG15 complex reveals that residues Arg151 and Arg153 of the LRLRGG motif clash with this short alpha-helix of unbound USP18 (XREF_FIG)."
Tungsten affects USP18
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Tungsten increases the amount of USP18. 1 / 1
1 |

No evidence text available
Tumor necrosis alpha affects USP18
| 1
Tumor necrosis alpha activates USP18. 1 / 1
| 1

eidos
"Usp18 is strongly upregulated by type I and type III IFNs [ 33,35,37,51,52 ] , lipopolysaccharides [ 53,54 ] , polyI :C [ 53 ] , tumor necrosis factor alpha ( TNFalpha ) [ 54 ] , or genotoxic stresses [ 35,55 ] ."
Toluene 2,4-diisocyanate increases the amount of USP18. 1 / 1
1 |

No evidence text available
Tetraphene affects USP18
1 |
Tetraphene decreases the amount of USP18. 1 / 1
1 |

No evidence text available
Specific interference RNA affects USP18
| 1
Specific interference RNA inhibits USP18. 1 / 1
| 1

eidos
"USP18 expression levels were up-regulated by plasmid transfection or inhibited by specific small interference RNA ( siRNA ) , and the effect of USP18 on the replication of DENV-2 was examined in the presence or absence of IFN-alpha both at mRNA and protein level ."
Silibinin affects USP18
| 1
Silibinin decreases the amount of USP18. 1 / 1
| 1

reach
"Using multiple inhibitors of TNF-α/LPS signaling, we found that two inhibitors, silibinin (an inhibitor of IKKα) and NSC33994 (a Jak2 inhibitor) possess the ability to inhibit TNF-α and LPS-induced USP18 expression and proinflammatory effects."
Recombinant IFN-lambda4 protein affects USP18
| 1
Recombinant IFN-lambda4 protein increases the amount of USP18. 1 / 1
| 1

reach
"In hepatoma cells, IFNL4 gene transfection or recombinant IFN-lambda4 protein treatment robustly increased the protein levels of ISG15 and USP18 in an IFNLR1 dependent manner and potently blocked IFN-alpha signalling."
1 |

No evidence text available
PolyI :C affects USP18
| 1
PolyI :C activates USP18. 1 / 1
| 1

eidos
"Usp18 is strongly upregulated by type I and type III IFNs [ 33,35,37,51,52 ] , lipopolysaccharides [ 53,54 ] , polyI :C [ 53 ] , tumor necrosis factor alpha ( TNFalpha ) [ 54 ] , or genotoxic stresses [ 35,55 ] ."
Poly I:C affects USP18
| 1
Poly I:C increases the amount of USP18. 1 / 1
| 1

reach
"Further investigation focused on the expression of TLR3, ISG56, ISG43 and Mx1 induced by the poly I : C stimulation (XREF_FIG)."
Poly I affects USP18
| 1
Poly I increases the amount of USP18. 1 / 1
| 1

reach
"Further investigation focused on the expression of TLR3, ISG56, ISG43 and Mx1 induced by the poly I:C stimulation (Fig. 3) ."
Phenformin affects USP18
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Phenformin increases the amount of USP18. 1 / 1
1 |

No evidence text available
Phage cell line affects USP18
| 1
Phage cell line activates USP18. 1 / 1
| 1

eidos
"For example , LPS treatment of a murine macro - phage cell line upregulates USP18 in an IRF3-dependent manner ( 18 ) ."
MiR-532-3p affects USP18
| 1
MiR-532-3p activates USP18. 1 / 1
| 1

reach
"Altogether these data demonstrate that the USP18 3 ' UTR sequence can be directly targeted by miR-191-5p, miR-24-3p, miR-423-5p, and miR-532-3p, with an effect on USP18 abundance."
Methylation affects USP18
| 1
| 1

eidos
"We observed that the decitabine treatment reduced the fraction of cells with prolonged delay times in USP18 induction , which is in part due to earlier USP18 upregulation ( Figure 5 - - figure supplement 4 ) , supporting that the promoter methylation inhibits USP18 induction ( Figure 5D ) ."
1 |
Manganese atom increases the amount of USP18. 1 / 1
1 |

No evidence text available
Magnetite nanoparticle increases the amount of USP18. 1 / 1
1 |

No evidence text available
1 |

No evidence text available
Linc-UR-B1 affects USP18
| 1
Linc-UR-B1 activates USP18. 1 / 1
| 1

reach
"Future studies will be necessary to determine whether linc-UR-B1 contributes to maintain USP18 in human male germ cells and indirectly favors viral persistence."
Linc-DGCR6-1 affects USP18
| 1
Linc-DGCR6-1 activates USP18. 1 / 1
| 1

reach
"In DM, linc-DGCR6-1 expression was hypothesized to target the USP18 protein, a type 1 IFN inducible protein that is considered a key regulator of IFN signaling."
Iohexol affects USP18
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Iohexol decreases the amount of USP18. 1 / 1
1 |

No evidence text available
IncobotulinumtoxinA decreases the amount of USP18. 1 / 1
1 |

No evidence text available
1 |
Hsa-miR-215-5p decreases the amount of USP18. 1 / 1
1 |

No evidence text available
1 |
Fumonisin B1 increases the amount of USP18. 1 / 1
1 |

No evidence text available
Estradiol affects USP18
| 1
Estradiol increases the amount of USP18. 1 / 1
| 1

reach
"Progesterone (P 4 ), estradiol (E 2 ), and IFNT significantly stimulated USP18 expression in goat endometrial epithelial cells (gEECs) cultured in vitro."
Endotoxin affects USP18
| 1
Endotoxin activates USP18. 1 / 1
| 1

eidos
"For example , inflammatory stimuli , e.g ., endotoxin and lipopolysaccharide ( LPS ) , have been shown to upregulate USP18 in peritoneal exudate macrophages ( 18 ) ."
EIFNlambda4 affects USP18
| 1
EIFNlambda4 activates USP18. 1 / 1
| 1

eidos
"While eIFNlambda4 resulted in slight increase of USP18 , our IFNlambda4 variants ( M1 , M3 and M7 ) showed a comparable activity to IFNlambda1 , 2 and 3 ( Fig. 5F ) ."
DsRNA affects USP18
| 1
DsRNA increases the amount of USP18. 1 / 1
| 1

reach
"XREF_BIBR, XREF_BIBR We presently show that IFNalpha and dsRNA induce USP18 expression in human islets, primary rat beta cells and INS-1E cells, supporting its role in IFN related signaling pathways and antiviral responses in pancreatic beta cells."
Copper(II) sulfate decreases the amount of USP18. 1 / 1
1 |

No evidence text available
1 |
Cobalt dichloride decreases the amount of USP18. 1 / 1
1 |

No evidence text available
Clustered interspaced palindromic repeats affects USP18
| 1
Clustered interspaced palindromic repeats activates USP18. 1 / 1
| 1

eidos
"Experimental depletion of USP18 by clustered regularly interspaced short palindromic repeats ( CRISPR ) / CRISPR-associated protein 9 ( Cas9 ) gene editing results in a significant restriction of HIV-1 replication in an induced pluripotent stem cell ( iPSC ) - derived macrophage model ."
Clone affects USP18
| 1
Clone increases the amount of USP18. 1 / 1
| 1

reach
"In contrast to IFN-λ treatment, IFN-α treatment of this clone failed to induce the expression of the IFN-stimulated genes, Oasl2 (Fig. 2A) and Usp18 (Fig. 2B), and to protect against infection with TM967, a TMEV derivative expressing mCherry (Fig. 2C)."
Clofibrate affects USP18
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Clofibrate decreases the amount of USP18. 1 / 1
1 |

No evidence text available
1 |
Carbon nanotube increases the amount of USP18. 1 / 1
1 |

No evidence text available
Candesartan affects USP18
| 1
| 1

eidos
"Induction of USP18 gene expression by candesartan would therefore inhibit interferon signaling in the cells in which this gene is expressed ."
Benzene affects USP18
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Benzene increases the amount of USP18. 1 / 1
1 |

No evidence text available
ZDHHC17 affects USP18
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1 |

No evidence text available
XBP affects USP18
| 1
XBP increases the amount of USP18. 1 / 1
| 1

reach
"Further mechanism study showed that XBP upregulated USP18 expression, while silence of USP18 attenuated the cardioprotective effect of XBP and the increase of β 1 -AR by XBP."
UVRAG affects USP18
1 |
1 |

No evidence text available
USP18 affects white matter microglia
| 1
USP18 inhibits white matter microglia. 1 / 1
| 1

eidos
"Recently , a deficiency in the ubiquitin specific protease 18 ( usp18 ) was shown to specifically activate white matter microglia , and this was mediated specifically by a loss of regulation of STAT1 signaling and uncontrolled IFN-I activity ( Goldmann et al ., 2015 ) ."
USP18 affects susceptibility
| 1
USP18 activates susceptibility. 1 / 1
| 1

reach
"USP18 can increase HBV susceptibility by removing isopeptidase activity of ISG15 and promoting HBV replication by downregulating the I-IFN signal transduction pathway."
USP18 affects supernatant Figure 4C
| 1
USP18 inhibits supernatant Figure 4C. 1 / 1
| 1

eidos
"Knockdown of USP18 rescued the anti-DENV-2 effect of IFN-alpha and led to decreased DENV-2 RNA in Hela cells ( Figure 4B ) and supernatant ( Figure 4C ) compared to IFN-alpha treatment alone ."
USP18 affects signal transmission
| 1
USP18 inhibits signal transmission. 1 / 1
| 1

eidos
"USP18 interacts with IFNAR2 to prevent JAK1 from interacting with IFNAR2 , and thus , USP18 suppresses signal transmission from IFN-alpha binding [ 47 , 48 ] ."
USP18 affects resistance Hepatitis C Virus
| 1
USP18 activates resistance Hepatitis C Virus. 1 / 1
| 1

eidos
"Our previous study revealed that increased USP18 expression contributed to the IFN-alpha resistance of Hepatitis C Virus ( HCV ) ."
USP18 affects replication
| 1
USP18 inhibits replication. 1 / 1
| 1

eidos
"The over-expression of porcine ubiquitin specific protease 18 ( USP18 ) is reported to reduce the in-vitro PRRSV replication by altering the cellular distribution of two subunits of NFkB heterodimers ( p56 and p50 ) ; [ 60 ] which indicates the role of USP18 as a host restriction factor during innate immune response to PRRSV ."
USP18 affects regulation IFN-I
| 1
USP18 inhibits regulation IFN-I. 1 / 1
| 1

eidos
"A negative regulation of IFN-I expression may also be mediated by USP18 , an ISG displaying a potent inhibitory effect on the IFN-I pathway , to prevent autoinflammatory consequences of uncontrolled IFN-I production ."
USP18 affects rbPept2
| 1
USP18 activates rbPept2. 1 / 1
| 1

reach
"Warsi, et al demonstrated that transport activity of rabbit peptide transporters Pept1 and Pept2 was decreased in Xenopus laevis oocytes injected with cRNA encoding the E3 ubiquitin ligase Nedd4-2, whereas overexpression of USP18 (Ubiquitin like specific protease 18), an enzyme cleaving ubiquitin from target proteins, stimulated the transport activity of rbPept1 and rbPept2 [XREF_BIBR]."
USP18 affects rbPept1
| 1
USP18 activates rbPept1. 1 / 1
| 1

reach
"Warsi, et al demonstrated that transport activity of rabbit peptide transporters Pept1 and Pept2 was decreased in Xenopus laevis oocytes injected with cRNA encoding the E3 ubiquitin ligase Nedd4-2, whereas overexpression of USP18 (Ubiquitin like specific protease 18), an enzyme cleaving ubiquitin from target proteins, stimulated the transport activity of rbPept1 and rbPept2 [XREF_BIBR]."
USP18 affects ptc
| 1
USP18 inhibits ptc. 1 / 1
| 1

reach
"Ectopic overexpression and knockdown assays indicated that USP18 can negatively regulate the proliferation of PTC cell lines."
USP18 affects protein is expressed tumor tissues cells
| 1
USP18 activates protein is expressed tumor tissues cells. 1 / 1
| 1

eidos
"We demonstrated that FTO protein is however , highly expressed in tumor tissues and cells due to the upregulation of USP18 ."
USP18 affects polyubiquitination
| 1
USP18 inhibits polyubiquitination. 1 / 1
| 1

sparser
"Besides, USP18 could inhibit K63-linked polyubiquitination of NEMO, and then negatively regulating the NF-κB signaling pathways (Yang et al., xref )."
USP18 affects poly(I:C)
| 1
| 1

reach
"The changes in TLR3 and IRF7 would predict increased responses to poly(I:C) when conditioned with IFNβ, but expression of USP18, a key negative regulator of IFNAR was also dramatically increased, perhaps mitigating the poly(I:C) response.The effect of IFNγ conditioning on IRF and ISGF3 signaling was particularly striking."
USP18 affects phosphorylated AKT p-AKT p-mTOR protein
| 1
USP18 activates phosphorylated AKT p-AKT p-mTOR protein. 1 / 1
| 1

eidos
"The expression of phosphorylated AKT ( p-AKT ) and p-mTOR protein was decreased in ovarian cancer cells by USP18 knockdown ."
USP18 affects peptide
| 1
| 1

reach
"It has also been reported that silencing USP18 increases surface expression of peptide-loaded MHC-II, supporting its role as a negative regulator of immunogenicity."
| 1
| 1

reach
"By inhibiting the JAK/STAT pathway and suppressing the downstream effects of type I IFN signaling USP18 effectively reduces auto-inflammatory pathogenesis."
USP18 affects pancreatic tumour growth
| 1
USP18 activates pancreatic tumour growth. 1 / 1
| 1

eidos
"USP18 promotes pancreatic tumour growth in vivo and in vitro ."
USP18 affects osteopenia
| 1
USP18 inhibits osteopenia. 1 / 1
| 1

eidos
"USP18 deficiency leads to increased RANKL-mediated osteoclastogenesis , resulting in osteopenia phenotype in vivo and in vitro [ 77 ] ."
USP18 affects oncogenic NF-kappaB
| 1
USP18 activates oncogenic NF-kappaB. 1 / 1
| 1

eidos
"Furthermore , USP18 has been demonstrated to activate oncogenic NF-kappaB signaling by disrupting ISGylation of NF-kappaB [ 113 ] ."
USP18 affects miR-24-3p
| 1
USP18 activates miR-24-3p. 1 / 1
| 1

reach
"Interestingly, we found that testis, and in particular germ cells, express moderate to high levels of three USP18 targeting miRNAs, namely miR-191-5p, miR-24-3p, and miR-423-5p (XREF_SUPPLEMENTARY)."
USP18 affects miR-122
| 1
USP18 decreases the amount of miR-122. 1 / 1
| 1

reach
"Over expression of miR-130a upregulated the expression of type I IFN (IFN-alpha and IFN -beta), ISG15, USP18 and MxA, which are involved in innate immune response and decreased expression of miR-122, a well defined miRNA promoting HCV production."
USP18 affects master thermoregulator
| 1
USP18 activates master thermoregulator. 1 / 1
| 1

eidos
"Also , the master thermoregulator , UCP1 , was repressed by loss of USP18 expression ."
USP18 affects maintain responsiveness cells
| 1
USP18 inhibits maintain responsiveness cells. 1 / 1
| 1

eidos
"Low USP18 may be critical to maintain high responsiveness of these cells to IFN ."
USP18 affects lung tumorigenesis
| 1
USP18 activates lung tumorigenesis. 1 / 1
| 1

eidos
"Prior work established that USP18 promotes lung tumorigenesis ."
USP18 affects interferonopathy resulting perinatal death brain malformations
| 1
USP18 inhibits interferonopathy resulting perinatal death brain malformations. 1 / 1
| 1

eidos
"Deficiency of USP18 causes a severe type I interferonopathy resulting in perinatal death with serious brain malformations due to spontaneous microglia activation , which most likely results from unrestrained response to constitutive IFNbeta ( Meuwissen et al ., 2016 ) ."
USP18 affects interferon response
| 1
USP18 inhibits interferon response. 1 / 1
| 1

eidos
"Mechanistically , Usp18 strongly limited the type I interferon response and thereby facilitated replication of the virus ."
| PMC
USP18 affects infection.Figure 2
| 1
USP18 activates infection.Figure 2. 1 / 1
| 1

reach
"In individuals carrying the unfavorable allele, a high basal level of IFN-λ, ISGs, and USP18 will lead to a refractory state and unresponsiveness to the IFN-α treatment and failure to clear the infection.Figure 2: Interferon (IFN)-λ modulation of hematopoietic cells."
USP18 affects growth PC cells
| 1
USP18 activates growth PC cells. 1 / 1
| 1

eidos
"c-Myc is crucial for USP18-mediated pancreatic cancer progression To further validate that USP18 mediated the growth of PC cells by regulating c-Myc , we first increased the expression of c-Myc in USP18 knockdown PC cells and then measured the USP18 and c-Myc protein expression levels and cell proliferation ."
USP18 affects genotoxic stress
| 1
USP18 activates genotoxic stress. 1 / 1
| 1

eidos
"USP18 has been known to be induced by viral infection , genotoxic stress or interferon [ 97 ] ."
| 1

reach
"Remarkably, USP18 requires Signal transducer and activator of transcription 2 (STAT2) for exerting its inhibitory effect on IFN signaling and IFN-stimulated gene expression (Arimoto et al., 2017) (Figure 1)."

eidos
"This study reports the previously unrecognized finding that increased USP18 activity promotes lipolysis and fatty acid oxidation by stabilizing both adipose triglyceride lipase ( ATGL ) and Uncoupling Protein 1 ( UCP1 ) ."
USP18 affects emergence absolute discrimination
| 1
USP18 activates emergence absolute discrimination. 1 / 1
| 1

eidos
"Most importantly , this differential effect of USP18 increases the separation in pSTATmax values between the two interferons and leads to the emergence of a region of absolute discrimination , which is expected to be apparent at long times ( 10-48 hours ) when sufficient USP18 has accumulated in the cell ."
USP18 affects differential-IFN-α
| 1
USP18 activates differential-IFN-α. 1 / 1
| 1

reach
"These studies have also found that USP18-mediated desensitization to type I IFN is differential-IFN-α signaling is blocked, whereas IFN-β continues to activate the JAK-STAT pathway (111, 112) ."
USP18 affects desensitization
| 1
USP18 activates desensitization. 1 / 1
| 1

eidos
"USP18 alone is not sufficient to induce desensitization ."
| PMC
USP18 affects desensitization IFNalpha signal transduction
| 1
USP18 activates desensitization IFNalpha signal transduction. 1 / 1
| 1

eidos
"Taken together , it was proposed that USP18 causes desensitization of IFNalpha signal transduction by impairing the formation of functional IFNalpha-binding sites ( Francois-Newton et al , 2011 ) ."
| PMC
USP18 affects degradation
| 1
USP18 inhibits degradation. 1 / 1
| 1

sparser
"More importantly, we found that USP18 significantly inhibited the degradation of endogenous IκBα protein in the presence of MyD88 ( xref )."
USP18 affects cell
| 1
USP18 activates cell. 1 / 1
| 1

eidos
"Further investigation revealed that USP18 promoted cell progression by increasing c-Myc expression , which has been reported to control pancreatic cancer progression , and our data demonstrated that c-Myc is key for USP18-mediated pancreatic cancer cell progression in vitro and in vivo ."
USP18 affects cell sensitivity IFN-a
| 1
USP18 activates cell sensitivity IFN-a. 1 / 1
| 1

eidos
"USP18 is a wellestablished negative regulator of IFN-a signaling [ 37 ] , which sustains JAK / STAT activation [ 38 ] , thus exacerbating cell sensitivity to IFN-a ."
| 1

reach
"Furthermore, cell apoptosis was promoted by USP18 silencing, and interference of USP18 suppressed cell migration and invasion."
USP18 affects c-Myc mRNA
| 1
USP18 inhibits c-Myc mRNA. 1 / 1
| 1

reach
"The result showed that downregulation of USP18 significantly decreased c-Myc mRNA and protein levels in BxPC-3 cells (XREF_FIG, XREF_FIG)."
USP18 affects antiviral mechanism
| 1
USP18 inhibits antiviral mechanism. 1 / 1
| 1

eidos
"Here , we find that attenuation of this antiviral mechanism by USP18 in the context of HIV-1 infection has a net beneficial effect for the virus by overriding key antiviral signals ."
USP18 affects acute promyelocytic leukaemia cell growth
| 1
USP18 activates acute promyelocytic leukaemia cell growth. 1 / 1
| 1

eidos
"For instance , downregulation of USP18 reduces acute promyelocytic leukaemia cell growth and induces apoptosis , whereas silencing USP18 in glioblastoma cells enhances IFN-induced apoptosis [ 20 ] ."
USP18 affects ZDHHC17
1 |
1 |

No evidence text available
USP18 affects ZAP70
| 1
USP18 activates ZAP70. 1 / 1
| 1

reach
"Because USP18 deficiency potentiated activation of molecules such as IKK, JNK, and NFAT distal from TCR, but not TCR proximal signaling complex ZAP70 or PLC-gamma, we reasoned that USP18 might target some key molecules in between the proximal and distal signaling complexes, of which TAK1 is a promising candidate."
USP18 affects UVRAG
1 |
1 |

No evidence text available
USP18 affects UBA1
| 1

sparser
"Our results indicate that E3 ligases, UBA1 and USP18 are associated with HCC development and may possibly be considered as targets in the treatment of HCC."

reach
"USP18 reduces paclitaxol sensitivity of triple-negative breast cancer via autophagy."
USP18 affects Th17
| 1
USP18 activates Th17. 1 / 1
| 1

reach
"Usp18 Ity9 mice have increased IL-1beta and an elevated Th17 response."
USP18 affects Th17 cell differentiation
| 1
USP18 activates Th17 cell differentiation. 1 / 1
| 1

eidos
"Moreover , USP17 is a positive regulator of RORgammat in Th17 cells , whereas USP18 has been reported to modulate T cell activation and Th17 cell differentiation by deubiquitinating of the TAK1-TAB1 complex [ 61 ] and USP25 has been regarded as a negative regulator of IL-17-mediated inflammation via TRAF5 and TRAF6 deubiquitination [ 62 ] ."
USP18 affects TRIM5
| 1
USP18 inhibits TRIM5. 1 / 1
| 1

reach
"Together, the data demonstrate that USP18 and TRIM5alpha attenuate NFAT1 activation in EC.The cellular experiments had identified a role of RNF213, USP18, and TRIM5alpha in the regulation of NFAT1."
USP18 affects TMEM14A
1 |
1 |

No evidence text available
USP18 affects TAK1-TAB complexes
| 1
USP18 leads to the deubiquitination of TAK1-TAB complexes. 1 / 1
| 1

reach
"Mechanistically, we found that USP18 interacted with and inhibited ubiquitination and activation of TAK1-TAB complexes."
USP18 affects T cell
| 1
USP18 activates T cell. 1 / 1
| 1

eidos
"Moreover , USP17 is a positive regulator of RORgammat in Th17 cells , whereas USP18 has been reported to modulate T cell activation and Th17 cell differentiation by deubiquitinating of the TAK1-TAB1 complex [ 61 ] and USP25 has been regarded as a negative regulator of IL-17-mediated inflammation via TRAF5 and TRAF6 deubiquitination [ 62 ] ."
USP18 affects Syndrome
| 1
| 1

reach
"LOF mutations in USP18 have been described in six patients from three unrelated families (95, 96) to cause pseudo-TORCH syndrome, a severe condition mimicking the phenotype secondary to transplacental transmission of pathogens referred to as TORCH (97)."
USP18 affects SOX9
| 1
| 1

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"We showed that USP18 binds, deubiquitinates, and thus, stabilizes SRY-box transcription factor 9 (SOX9), thereby regulating reactive astrogliosis."
USP18 affects SARS-CoV-2
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"Therefore, these results suggested that inhibiting the expression of IFIT3, OASL, USP18, XAF1, IFI27, and EPSTI1 may reduce the risk of SARS-CoV-2 infection and may also have a positive effect on antiviral therapy in patients with SARS-CoV-2 infection.and 4G)."

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"In addition, USP18 overexpression dramatically prevented focal cerebral I/R injury in mice through suppressing microglial activation and inflammation [21]."
USP18 affects RNF213
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USP18 inhibits RNF213. 1 / 1
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"Together, the data demonstrate that USP18 and TRIM5alpha attenuate NFAT1 activation in EC.The cellular experiments had identified a role of RNF213, USP18, and TRIM5alpha in the regulation of NFAT1."
USP18 affects PNPLA2
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Modified USP18 increases the amount of PNPLA2. 1 / 1
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"Loss of USP18 repressed adipose triglyceride lipase (ATGL) expression; gain of USP18 expression upregulated ATGL in lung cancer cells."
USP18 affects PIK3C3
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USP18 affects PC cell growth
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USP18 activates PC cell growth. 1 / 1
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"USP18 promotes PC cell growth by facilitating cell cycle progression To further understand the mechanism by which USP18 contributes to PC cell growth , we investigated the effects of USP18 knockdown on the cell cycle and apoptosis ."
USP18 affects PAMPs
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USP18 activates PAMPs. 1 / 1
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"Usp18 Ity9 / Usp18 Ity9 mice present increased responsiveness to PAMPs and Salmonella induced septic shock."
USP18 affects NXF1
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No evidence text available
USP18 affects NME1
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No evidence text available
USP18 affects NFKBIA
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USP18 activates NFKBIA. 1 / 1
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"More importantly, we found that USP18 significantly inhibited the degradation of endogenous IkappaBalpha protein in the presence of MyD88 (XREF_FIG)."
USP18 affects MYL6
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No evidence text available
USP18 affects MOV10
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USP18 affects MHC I
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USP18 increases the amount of MHC I. 1 / 1
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"In addition, lack of USP18 reduced the number of DCs and enhanced the expression of MHC I and the costimulatory molecular CD80."
USP18 affects JAK1-IFNAR2 interaction
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USP18 inhibits JAK1-IFNAR2 interaction. 1 / 1
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"As a negative regulator of the Jak / STAT signaling , USP18 binds to the intracellular domain of IFNAR2 to block the JAK1-IFNAR2 interaction , leading to the inhibition of signal transduction ( Malakhova et al ., 2006 ) ."
USP18 affects ITGB5
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USP18 decreases the amount of ITGB5. 1 / 1
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"However, USP18 interference significantly inhibited the expression of HOXA10, ITGB1, ITGB3, and ITGB5 in gEECs."
USP18 affects ISG induction
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USP18 inhibits ISG induction. 1 / 1
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"Furthermore , knockdown of USP18 increases both ISG induction and anti-HCV activity of IFN - ( 14 ) , and data have shown that IFN - treatment given to mice in vivo increases hepatic USP18 and blunts the effect of a subsequent dose of IFN - ( 12 ) ."
USP18 affects ISG induction anti-HCV IFN-alpha
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USP18 inhibits ISG induction anti-HCV IFN-alpha. 1 / 1
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"Furthermore , knockdown of USP18 increases both ISG induction and anti-HCV activity of IFN-alpha ( 14 ) , and data have shown that IFN-alpha treatment given to mice in vivo increases hepatic USP18 and blunts the effect of a subsequent dose of IFN-alpha ( 12 ) ."
USP18 affects IRF1-silenced HUVECs
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USP18 activates IRF1-silenced HUVECs. 1 / 1
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"STAT1 , USP18 and IRF1 modulate CXCL10 levels in EC following IFN-alpha stimulation To validate the transcriptional regulations inferred in our multiple-output FFL regulatory subnetwork ( Fig. 2 ) , we measured CXCL10 protein levels in tissue culture media conditioned by STAT1 - , USP18 - , IFIH1 - and IRF1-silenced HUVECs , compared to HUVECs transfected with a scrambled siRNA ( siCTRL ) ."
USP18 affects IL15
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USP18 decreases the amount of IL15. 1 / 1
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"These results were confirmed in primary rat beta cells (XREF_FIG) in which USP18 inhibition upregulated CXCL10, CCL5 and IL-15 mRNA expression."
USP18 affects IKB
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USP18 activates IKB. 1 / 1
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"USP18 was upregulated by various TLR ligands in THP-1 (a human monocyte cell line) cells and inhibited IkappaB degradation as well as NF-kappaB activation to form a negative feedback loop."
USP18 affects IFNAR1 recruitment
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USP18 inhibits IFNAR1 recruitment. 1 / 1
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"USP18 is modeled as pre-bound to IFNAR2 ( i.e ., before IFN stimulation ) and reduces IFNAR1 recruitment into the ternary complex by increasing k-4 ( see Long Time Deactivation via USP18 Regulates Receptor Complex Stability to Achieve Absolute Discrimination ) ."
USP18 affects IFNA2R
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USP18 binds IFNA2R. 1 / 1
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"In line with this proviral role, free ISG15 also stabilizes the deISGylase USP18, which binds IFNA2R (IFN alpha 2 receptor) and blocks IFN signaling."
USP18 affects IFN-alpha refractory
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USP18 activates IFN-alpha refractory. 1 / 1
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"However , we have also found that USP18 is necessary but not sufficient on its own to induce an IFN-alpha refractory state ( 53 ) ."
USP18 affects IFN
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USP18 inhibits IFN. 1 / 1
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"In fact, USP18 knockdown contributes to IFN- and PIC induced caspases-9 and -3 activation and beta cell apoptosis."
USP18 affects IFN responsiveness
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USP18 inhibits IFN responsiveness. 1 / 1
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"Support for this notion is found in a mouse study in which expression of USP18 in macrophages led to lower IFN responsiveness , leading to locally restricted replication of VSV ( 22 ) ."
USP18 affects HOXA10
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USP18 decreases the amount of HOXA10. 1 / 1
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"However, USP18 interference significantly inhibited the expression of HOXA10, ITGB1, ITGB3, and ITGB5 in gEECs."
USP18 affects GBP1
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USP18 activates GBP1. 1 / 1
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"Consistent with these results, we observed enhanced GBP-1 expression and increased apoptosis in THP-1 and KT-1 cells treated with the USP18 aa 302-313 peptide (XREF_FIG and XREF_SUPPLEMENTARY)."
USP18 affects GBM cell invasion
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USP18 inhibits GBM cell invasion. 1 / 1
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"Functionally , decreased USP18 expression attenuated GBM cell invasion and migration through repressing EMT ."
USP18 affects FTO protein
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USP18 activates FTO protein. 1 / 1
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"In this study , we demonstrated that FTO protein but not mRNA is highly expressed in BLCA tissues and cell lines due to ubiquitin Specific Peptidase 18 ( USP18 ) - imposed post-translational deubiquitination on the N-terminal protein domain ."
USP18 affects EIF2AK2
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"Immunofluorescence analysis using specific dsRNA antibodies showed a significant and time-dependent accumulation of dsRNA in the USP18 KO cells after IFN treatment, indicating that USP18-dependent ISGylation under these conditions could inhibit ADAR activity.In addition to ADAR, PKR, RIG-I and MDA5, we found other proteins involved in antigen presentation and resistance to immunotherapy, such as TAP1, GBP1, STAT1, IFIT1, PSMB10, PSMB9, GBP2, MAGE and PARP14, also regulated by USP18-dependent ISGylation."
USP18 affects EGFP
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"Further, overexpression of EGFPUSP18 under the control of the CMV promoter resulted in a reduction of the co‐localization of HaloTag‐IFNAR1 and SNAPf‐IFNAR2c in U5A cells treated with IFNα (Wilmes et al , xref )."
| PMC
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"Our results indicate that E3 ligases, UBA1 and USP18 are associated with HCC development and may possibly be considered as targets in the treatment of HCC."
USP18 affects Deconjugation
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USP18 activates Deconjugation. 1 / 1
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"Deconjugation is catalyzed by USP18 which releases ISG15 from its substrate ( 5 ) ( 6 ) ."
USP18 affects DM
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USP18 activates DM. 1 / 1
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"The qRT-PCR results showed that the expression levels of lncRNAs- ENST00000541196.1, uc011ihb.2, linc-DGCR6-1, and of mRNAs- USP18, IFIH1 were significantly increased (P values all < 0.05) in DM patients compared to that in healthy controls."
USP18 affects DENV resistance IFN-alpha
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USP18 activates DENV resistance IFN-alpha. 1 / 1
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"Therefore , we hypothesized that USP18 might mediate the DENV resistance to IFN-alpha ."
USP18 affects Carcinoma
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"USP18 promotes tumor metastasis in esophageal squamous cell carcinomas via deubiquitinating ZEB1."
USP18 affects CD80
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USP18 decreases the amount of CD80. 1 / 1
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"In addition, lack of USP18 reduced the number of DCs and enhanced the expression of MHC I and the costimulatory molecular CD80."
USP18 affects CD4
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USP18 inhibits CD4. 1 / 1
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"In our mammary tumour model we show that Usp18 deficiency can reverse the effect of CD4 + T cells on tumour growth."
USP18 affects CBLIF
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USP18 activates CBLIF. 1 / 1
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"For instance, silencing USP18 expression with siRNA potentiated the antiviral activity of INF against hepatitis C virus (HCV) infection [XREF_BIBR]."
USP18 affects AQP4
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USP18 activates AQP4. 1 / 1
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"In separate experiments, ISG15 alone and USP18 alone did not modulate AQP4 (XREF_FIG)."
UBA7 affects USP18
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"Our results indicate that E3 ligases, UBA1 and USP18 are associated with HCC development and may possibly be considered as targets in the treatment of HCC."
Treatment Huh7.5 cells TNF LPS affects USP18
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Treatment Huh7.5 cells TNF LPS activates USP18. 1 / 1
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"Treatment of Huh7.5 cells with TNF - or LPS induced expression of USP18 in 74.1 % Dei 8.9 % and 70.5 % Dei 5.2 % , respectively , compared to untreated controls in which USP18 expression was 31.0 % Dei 4.7 % ( Fig. 1Fi ) ."
TMEM14A affects USP18
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No evidence text available
TGFB affects USP18
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TGFB activates USP18. 1 / 1
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"When we examined WT and USP18KO naive T cells differentiation into iT reg cells, we found that the expression level of Foxp3 was significantly higher in Usp18 -/- cells compared with WT cells treated with TGF-beta alone (XREF_FIG)."
TAB1 affects MAP3K7
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"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
SPHK affects USP18
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SPHK inhibits USP18. 1 / 1
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"ISG15 prevents the degradation of USP18 by sphingosine kinase 2 ( SPK2 ) [ 20,21 ] ."
| PMC
SOX9 affects USP18
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"We showed that USP18 binds, deubiquitinates, and thus, stabilizes SRY-box transcription factor 9 (SOX9), thereby regulating reactive astrogliosis."
SH3PXD2A affects USP18
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"Further mutation assays revealed that the distant ISRE motif primarily contributed to the induction of zebrafish USP18 by fish IFN and IFN stimuli."
RNASEL affects USP18
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RNASEL inhibits USP18. 1 / 1
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"In this context, ISG43 (HuUBP43) induction by interferon is negatively regulated by RNase-L, thereby assisting in fine tuning the regulation of interferon stimulated gene expression in virally infecte[MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"
PIK3C3 affects USP18
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No evidence text available
NXF1 affects USP18
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No evidence text available
NME1 affects USP18
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No evidence text available
MYL6 affects USP18
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No evidence text available
MOV10 affects USP18
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No evidence text available
MAP3K7 affects TAB1
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"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
LPS treatment murine macrophage cell line affects USP18
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LPS treatment murine macrophage cell line activates USP18. 1 / 1
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"For example , LPS treatment of a murine macrophage cell line upregulates USP18 in an IRF3-dependent manner ( 18 ) ."
LC3II affects USP18
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LC3II activates USP18. 1 / 1
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"Thus, the increased p62 and decreased LC3II observed in Usp18 Ity9 mice in vivo raises the possibility that autophagy may be impaired in Usp18 Ity9 mutant mice although a more comprehensive evaluation of autophagy in vitro will be necessary to draw a final conclusion."
KRAS affects USP18
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"KRAS is Associated with USP18 in Lung Cancer Cell Lines."
Interferon affects IFNAR2
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"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
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"b | Intracellular functions : Ubl carboxy-terminal hydrolase 18 ( USP18 ) and S-phase kinase-associated protein 2 ( SKP2 ) : USP18 , which is induced by type I interferons , mediates the negative feedback regulation of interferon signalling independent of its deISGylase activity ."
IKK_complex affects USP18
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"Taken together, these results suggest that in addition to the TAK1-TAB1 complex, USP18 also interacts with the IKK complex upon LPS treatment in a NEMO-dependent manner."
IKBKG affects TAB1
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"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
IKBKG affects IKK_complex, and USP18
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sparser
"Taken together, these results suggest that in addition to the TAK1-TAB1 complex, USP18 also interacts with the IKK complex upon LPS treatment in a NEMO-dependent manner."
IKBKG affects CHUK
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sparser
"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
IFNAR2 affects Interferon, STAT2, and USP18
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"Recently, it was also demonstrated that USP18 can directly interact with STAT2 to form a complex that inhibits IFN-I ligand binding to IFNAR2 ( xref , xref )."
IFNA2R affects USP18
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USP18 binds IFNA2R. 1 / 1
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"In line with this proviral role, free ISG15 also stabilizes the deISGylase USP18, which binds IFNA2R (IFN alpha 2 receptor) and blocks IFN signaling."
HIV-1 tunes affects USP18
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HIV-1 tunes activates USP18. 1 / 1
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"USP18 induction by HIV-1 tunes the IFN response to optimal levels allowing for efficient transcription from the HIV-1 LTR promoter while minimizing the T1 IFN-induced antiviral response that would otherwise restrict viral replication and spread ."
FIP related reasons affects USP18
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FIP related reasons activates USP18. 1 / 1
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"USP17 was euthanized 1 month prior to USP18 due to FIP related reasons ."
EGFP affects USP18
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"Further, overexpression of EGFPUSP18 under the control of the CMV promoter resulted in a reduction of the co‐localization of HaloTag‐IFNAR1 and SNAPf‐IFNAR2c in U5A cells treated with IFNα (Wilmes et al , xref )."
| PMC
| 1

sparser
"Our results indicate that E3 ligases, UBA1 and USP18 are associated with HCC development and may possibly be considered as targets in the treatment of HCC."
CRISPR Cas9 editing affects USP18
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CRISPR Cas9 editing inhibits USP18. 1 / 1
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"Experimental depletion of USP18 by CRISPR / Cas9 gene editing results in a significant restriction of HIV-1 replication in an induced pluripotent stem cell ( iPSC ) - derived macrophage model ."
CHUK affects TAB1
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"Furthermore, USP18 interacted with TAK1-TAB1 complex and IKKα/β-NEMO complex, respectively."
BCHE affects USP18
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BCHE inhibits USP18. 1 / 1
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"Decreasing ISGylation by knockdown of the ISG15 E1 enzyme, Ube1L, in primary USP18(+/+) and USP18(−/−) hepatocytes led to increased MHV-3 replication."
3A affects USP18
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3A inhibits USP18. 1 / 1
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"In addition, STAT2 CC/DB 3A, but not STAT2 CC/DB, partially blocked the effect of USP18 on transcription of ISGs, such as GBP1 and IFIT1 (XREF_FIG and XREF_SUPPLEMENTARY)."
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No evidence text available
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No evidence text available