IndraLab
Statements
sparser
"As m6A eraser, FTO mainly plays demethylation activity for the m6A of single‐stranded RNA, thus regulating gene expression. xref , xref Huang et al. xref revealed that FTO suppressed nasopharyngeal carcinoma cell ferroptosis to enhance radioresistance via stabilizing the interaction between OTUB1 and SLC7A11 by inhibiting the m6A modification of OTUB1."
sparser
"Moreover, as
shown in xref , co-immunoprecipitation assays revealed that both
functional mutants OTUB1(C91A) and OTUB1(D88A) can interact with SLC7A11 although the binding affinity between OTUB1(D88A) and
SLC7A11 was apparently lower than the one between OTUB1(C91A) and SLC7A11."
sparser
"In particular, our results show that (i) OTUB1 is a bona fide binding
partner of SLC7A11 both in vitro and in vivo; (ii) OTUB1 acts as a major regulator for SLC7A11
activity in human cancer cells; (iii) OTUB1 inactivation promotes ferroptosis in human cancer cells primarily by down-regulating
SLC7A11 levels; (iv) OTUB1 is overexpressed in human cancers and the OTUB1-SLC7A11 interaction is critical for tumor growth; (v) The
OTUB1-SLC7A11 interaction is tightly regulated by CD44 in human cancer cells."
sparser
"In this study, we demonstrate that, by promoting
the interaction between SLC7A11 and OTUB1, CD44 serves as a positive regulator of SLC7A11 activity by facilitating the recruitment of
OTUB1 and thereby reducing the sensitivity of cancer cells to oxidative stress and ferroptotic death ( xref and xref )."
sparser
"To further define the functional domain of the ZRANB1 E3 ligase for SLC7A11, we transfected full-length ZRANB1 and three truncated forms ( xref ) into HEK293T cells ( xref ) and found that the OTU domain not only interacted with SLC7A11 ( xref ) but was also required for the degradation and ubiquitination of SLC7A11 by ZRANB1 ( xref )."
sparser
"The cell surface protein CD44 enhances the interaction between OTUB1 and SLC7A11, thereby preventing ferroptosis. xref These findings suggest that OTUB1 is crucial for regulating glioma cell progression, primarily through its direct interaction with the xCT system and modulation of ferroptosis pathways."
sparser
"Want et al. additionally determined that BC cells resistant to trastuzumab exhibit the upregulation of circ-BGN, which contributes to this chemoresistance through its ability to directly bind OTUB1 and SLC7A11, thus inhibiting ferroptotic cell death via the enhancement of OTUB1-mediated SLC7A11 deubiquitination ( xref )."
reach
"Two-dimensional (2D) polyacrylamide gel electrophoresis (PAGE) showed that SLC7A11, OTUB1, and SLC3A2 were detected in association with the ~150-kDa complex (Fig. 2B), and co-immunoprecipitation analysis further confirmed the association between SLC7A11, SLC3A2, and OTUB1 after IL-1β stimulation (Fig. 2C)."
reach
"Although the transmembrane glycoprotein, CD44, is also known to bind and stabilize the SLC7A11 and OTUB1 complex (22), we were not able to detect CD44 in primary lung epithelial cells in the absence or presence of IL-1β stimulation.PSSG is a key regulator of biological responses induced by redox perturbations."
reach
"However, one study found that the tumor stem cell marker CD44 inhibited ferroptosis in tumor cells in a manner dependent on the deubiquitinase OTUB1, and overexpression of CD44 improved the stability of the SLC7A11 protein by promoting the interaction between SLC7A11 and OTUB1 (84)."
sparser
"Given that SLC7A11 protein stability is regulated by the deubiquitylase OTUB1 in a CD44-dependent manner, with CD44 serving as a critical mediator of the OTUB1-SLC7A11 interaction [ xref , xref ], we investigated the expression patterns of these regulatory proteins alongside SLC7A11 and GPX4."
sparser
"CD44 overexpression significantly increased SLC7A11 protein levels and inhibited erastin-induced ferroptosis, but these effects were abrogated in OTUB1 KO cells, suggesting that CD44 regulates SLC7A11 protein stability and ferroptosis through OTUB1 and likely by promoting SLC7A11-OTUB1 interaction."
reach
"Besides, CO-IP and Duolink PLA assays confirmed the interactions between OTUB1 and SLC7A11 and the deubiquitinating effects of OTUB1 on SLC7A11 in PANC-1 and CFPAC-1 cells.As a form of cell death that is associated with iron-dependent peroxidation of polyunsaturated phospholipids in cell membranes, ferroptosis is generally induced through two pathways."
sparser
"However, one study found that the tumor stem cell marker CD44 inhibited ferroptosis in tumor cells in a manner dependent on the deubiquitinase OTUB1, and overexpression of CD44 improved the stability of the SLC7A11 protein by promoting the interaction between SLC7A11 and OTUB1 ( xref )."
sparser
"Recent studies have shown that overexpression of CD44 in cancer cells can promote the interaction between OTUB1 and SLC7A11 to enhance the stability of SLC7A11 (a subunit of glutamate-cystine antiporter system Xc-) and thereby inhibiting the ferroptosis, while the partial depletion of CD44 abolished this interaction ( xref )."
reach
"Taken together, although the precise mechanism by which OTUB1 induces SLC7A11 stabilization requires further elucidation, it is very likely that the binding between OTUB1 and SLC7A11 as well as OTUB1 's ability of inhibiting E2 conjugating enzymes recruited by the unknown E3 ligase contribute to SLC7A11 stabilization induced by OTUB1."
reach
"In this study, we demonstrate that, by promoting the interaction between SLC7A11 and OTUB1, CD44 serves as a positive regulator of SLC7A11 activity by facilitating the recruitment of OTUB1 and thereby reducing the sensitivity of cancer cells to oxidative stress and ferroptotic death (XREF_FIG and XREF_FIG)."
sparser
"Complementary approaches leverage plant-derived compounds: curcumin suppresses colon cancer angiogenesis through OTUB1 downregulation and subsequent TGFB1/VEGF axis inhibition, xref erianin impedes esophageal squamous cell carcinoma metastasis by triggering OTUB1 ubiquitin-proteasomal degradation, xref solasonine disrupts pancreatic cancer progression via coordinated OTUB1-SLC7A11 destabilization. xref "