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- W1965488243 abstract "Studies have shown salutary effects of 17beta-estradiol following trauma-hemorrhage on different cell types. 17beta-Estradiol also induces improved circulation via relaxation of the aorta and has an anti-apoptotic effect on endothelial cells. Because mitochondria play a pivotal role in apoptosis, we hypothesized that 17beta-estradiol will maintain mitochondrial function and will have protective effects against H(2)O(2)-induced apoptosis in endothelial cells. Endothelial cells were isolated from rats' aorta and cultured in the presence or absence of H(2)O(2), a potent inducer of apoptosis. In additional studies, endothelial cells were pretreated with 17beta-estradiol. Flow cytometry analysis revealed H(2)O(2)-induced apoptosis in 80.9% of endothelial cells; however, prior treatment of endothelial cells with 17beta-estradiol resulted in an approximately 40% reduction in apoptosis. This protective effect of 17beta-estradiol was abrogated when endothelial cells were cultured in the presence ICI-182780, indicating the involvement of estrogen receptor (ER). Fluorescence microscopy revealed a 17beta-estradiol-mediated attenuation of H(2)O(2)-induced mitochondrial condensation. Western blot analysis demonstrated that H(2)O(2)-induced cytochrome c release from mitochondrion to cytosol and the activation of caspase-9 and -3 were decreased by 17beta-estradiol. These findings suggest that 17beta-estradiol attenuated H(2)O(2)-induced apoptosis via ER-dependent activation of caspase-9 and -3 in rat endothelial cells through mitochondria." @default.
- W1965488243 created "2016-06-24" @default.
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- W1965488243 date "2007-02-01" @default.
- W1965488243 modified "2023-10-16" @default.
- W1965488243 title "Mitochondria play an important role in 17β-estradiol attenuation of H<sub>2</sub>O<sub>2</sub>-induced rat endothelial cell apoptosis" @default.
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- W1965488243 doi "https://doi.org/10.1152/ajpendo.00413.2006" @default.
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