کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2113530 | 1084476 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Requirement of p38 MAPK for a cell-death pathway triggered by vorinostat in MDA-MB-231 human breast cancer cells Requirement of p38 MAPK for a cell-death pathway triggered by vorinostat in MDA-MB-231 human breast cancer cells](/preview/png/2113530.png)
Vorinostat is a histone deacetylase inhibitor that effectively suppresses cancer-cell proliferation by inducing cell-cycle arrest and/or apoptosis. We now show the involvement of p38 mitogen-activated protein kinase (MAPK) in the regulation of vorinostat-induced apoptosis in MDA-MB-231 human breast cancer cells. Vorinostat induced the hyperacetylation of histone H3, which correlated to apoptosis induction. Vorinostat-induced apoptosis occurred in parallel with the phosphorylation of p38 MAPK and the dephosphorylation of extracellular signal-regulated kinases 1 and 2 (ERK1/2). Knockdown of p38 MAPK prominently abrogated apoptosis induction and was accompanied by decreased caspase-3 cleavage. These findings support the notion that the activation of the p38 MAPK pathway followed by caspase-3 cleavage is responsible for vorinostat-induced apoptosis in MDA-MB-231 cells.
► Vorinostat-induced apoptosis correlates to hyperacetylation of histone H3 in MDA-MB-231 cells.
► Vorinostat activates the intrinsic apoptotic pathway and caspase-3 cleavage.
► Vorinostat modulates MAPK signaling during apoptosis induction.
► p38 MAPK is essential for the induction of vorinostat-induced apoptosis in MDA-MB-231 cells.
Journal: Cancer Letters - Volume 315, Issue 2, 28 February 2012, Pages 112–121