کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1964357 | 1058544 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Short-chain fatty acids induce acute phosphorylation of the p38 mitogen-activated protein kinase/heat shock protein 27 pathway via GPR43 in the MCF-7 human breast cancer cell line Short-chain fatty acids induce acute phosphorylation of the p38 mitogen-activated protein kinase/heat shock protein 27 pathway via GPR43 in the MCF-7 human breast cancer cell line](/preview/png/1964357.png)
The expression of GPR41 and 43, which have recently been identified as G-protein-coupled cell-surface receptors for short-chain fatty acids (SCFAs), was detected in a human breast cancer cell line (MCF-7) by RT-PCR. Acetate, propionate and butyrate induced an increase in intracellular Ca2+ in these cells that was not blocked by treatment with pertussis toxin (PTX). SCFAs significantly reduced forskolin-induced cAMP levels in these cells. The phosphorylation of mitogen-activated protein kinase (MAPK) p38 was selectively increased by SCFAs. The downstream substrate heat shock protein 27 (HSP27) was also phosphorylated by SCFAs at Ser-78 and-82, but not-15. Propionate induced elevations in intracellular Ca2+ and the phosphorylation of p38 were inhibited by the silencing of GPR43 using a specific siRNA. These results suggest that GPR41 and 43 mediate SCFA signaling in mammary epithelial cells and thereby play an important role in their stress management.
Journal: Cellular Signalling - Volume 19, Issue 1, January 2007, Pages 185–193