IndraLab
Statements
reach
"However, EGF, but not AREG, further decreased the total EGFR amount (XREF_FIG, lower panel), consistent with the known ability of EGF to cause rapid EGFR down-modulation [XREF_BIBR, XREF_BIBR, XREF_BIBR] and suggesting that AREG activated EGFR might escape this negative regulation."
reach
"It has been previously reported that EGF activation of EGFR leads to EGFR endocytosis and routing for degradation rather than recycling to the cell surface [47], which explains our finding that EGF stimulation diminished the level of EGFR and HLA class I/EGFR association in BxPC-3 cells."
reach
"Next, we analyzed expression levels of phosphorylated ERK1/2 and compared these results with EGFR (HER-1 and ErbB1) and HER2 and neu (ErbB2) expression levels, as EGFR conducts signals through Ras-Raf-MAPK pathway; gefitinib inhibited phosphorylation of ERK1/2 by EGF addition in cell lines with detectable and undetectable EGFR expression."
reach
"Diminished phospho-EGFR expression was confirmed in control (Pten fl/fl) epithelium as a response to erlotinib treatment, and importantly, EGF ligand mRNA expression is not reduced in isolated PTEN-null (Fsp-cre; Pten fl/fl) MMFs with in vitro EGFR inhibition supporting a direct epithelial specific response."
reach
"FTs (14 days old) were incubated in media with the addition of external EGF (20 ng/ml) for 24 h. Western blot analysis revealead i) that both MCF-7 and H460 cell lines have a functional EGFR signaling axis since as expected addition of external EGF donwregulated the expression of the EGFR (XREF_FIG), ii) that while EGF was able to downregulate the expression of EGFR, no significant effect on other proteins such as Nanog, Oct4, Sox2, AKT and p-AKT was observed (XREF_FIG)."
reach
"Stimulation of cells with EGF for 60 min did not reduce the membrane EGFR level in control A549 cells but did reduce the level in control A549 cells pretreated with monensin, a recycling inhibitor, indicating that EGFR is recycled back to the cell surface after 60 min of EGF treatment."
reach
"Real time PCR confirmed that treatment with B6H12 alone or in the presence of EGF eliminated detectable EGF and EGFR transcript expression, whereas treatment with isotype control antibody in the presence or absence of EGF did not significantly alter mRNA expression of EGF and EGFR."
reach
"Quantitative evaluation of jejunal EGF-R mRNA (n = 8-15/group) or protein levels (n = 4-5/group) revealed similar patterns, where septic mice had significantly higher levels of intestinal EGF-R compared to shams, with exogenous EGF treatment after the onset of sepsis reducing intestinal EGF-R expression (XREF_FIG)."
reach
"This revealed that ligand induced receptor loss was significantly greater for EGFR T669A than for WT EGFR at all EGF stimulation time points tested and that the degree of loss was progressively greater for EGFR T669A vs. WT EGFR with increasing duration of EGF treatment; 3h of EGF exposure caused nearly 50% loss of WT EGFR and> 90% loss of EGFR T669A."
reach
"Clonal off-target effects as an explanation for the observed phenotype could be excluded with high confidence based on the close agreement of observations with two different cell lines.In summary, the lack of GABARAP, either alone or in combination with GABARAPL2, was consistently and significantly associated with decreased total EGFR protein levels in response to EGF treatment in both Huh7.5 and HEK293 cells, whereas the presence of GABARAP in general was associated with higher EGFR total levels."