کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2051019 | 1074189 | 2006 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Transactivation of epidermal growth factor receptor by insulin-like growth factor 1 requires basal hydrogen peroxide Transactivation of epidermal growth factor receptor by insulin-like growth factor 1 requires basal hydrogen peroxide](/preview/png/2051019.png)
Insulin-like growth factor (IGF-1) plays an important role in prostate cancer development. Recent studies suggest that IGF-1 has mitogenic action through epidermal growth factor receptor (EGFR). However, the mechanism remains largely unknown. Here, we demonstrated in prostate cancer DU145 cells that IGF-1 induced EGFR transactivation, leading to ERK activation. Matrix metalloproteinase-mediated shedding of heparin-binding EGF is involved in this process. Antioxidants and catalase inhibited IGF-1-stimulated EGFR phosphorylation, indicating that H2O2 is required for EGFR activation. However, exogenous H2O2 did not activate EGFR or IGF-1R in DU145 cells. IGF-1 did not induced production of H2O2 in DU145 cells. Our results suggest that transactivation of EGFR by IGF-1 requires basal intracellular H2O2 in DU145 cells.
Journal: FEBS Letters - Volume 580, Issue 22, 2 October 2006, Pages 5161–5166