کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1928278 | 1050343 | 2015 | 6 صفحه PDF | دانلود رایگان |
• EGF and TGF-β signaling cooperatively regulate TMEPAI transcription.
• EGF-responsive elements reside in the first intron of TMEPAI gene.
• ELK-1 mediates the EGF-induced enhancement of TMEPAI expression.
TMEPAI/PMEPA1 (transmembrane prostate androgen induced-RNA/prostate transmembrane protein, androgen induced 1) is a pro-tumorigenic factor induced by TGF-β signaling and constitutive TMEPAI expression in lung cancer cells depends on activated autocrine TGF-β signaling. Here we demonstrate a novel mechanism of TMEPAI transcriptional co-regulation by EGF signaling. Interestingly, we found that ELK-1, downstream of EGFR/Ras/MAPK pathway, modulates TMEPAI expression. ELK-1 binds to the first intron (+1037 to +1294) of the TMEPAI gene together with TGF-β activated Smad3 and enhances the transcription of TMEPAI. Furthermore, TMEPAI gene activation by EGF and TGF-β signaling was reduced by the MEK inhibitor U0126. Together, EGF signaling collaboratively regulates TGF-β-induced TMEPAI expression.
Journal: Biochemical and Biophysical Research Communications - Volume 456, Issue 2, 9 January 2015, Pages 580–585