Estrogen-receptor-mediated protection of cerebral endothelial cell viability and mitochondrial function after ischemic insult in vitro.
Estrogen-receptor-mediated protection of cerebral endothelial cell viability and mitochondrial function after ischemic insult in vitro.
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DOI:
10.1038/jcbfm.2009.226
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发表时间:
2010-03
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--
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Protective effects of estrogen against experimental stroke and neuronal ischemic insult are well-documented, but it is not known if estrogen prevents ischemic injury to brain endothelium, a key component of the neurovascular unit. Increasing evidence indicates estrogen exerts protective effects through mitochondrial mechanisms. We previously found 17β-estradiol (E2) improves mitochondrial efficiency and reduces mitochondrial superoxide in brain blood vessels and endothelial cells. Thus we hypothesized E2 will preserve mitochondrial function and protect brain endothelial cells against ischemic damage. To test this, an in vitro ischemic model, oxygen-glucose deprivation (OGD)/reperfusion, was applied to immortalized mouse brain endothelial cells (bEnd3). OGD/reperfusion-induced cell death was prevented by long-term (24, 48 h), but not short-term (0.5, 12 h) pretreatment with 10 nM E2. Protective effects of E2 on endothelial cell viability were mimicked by an estrogen receptor (ER) agonist selective for ERα (PPT), but not one selective for ERβ (DPN). In addition, E2 significantly decreased mitochondrial superoxide and preserved mitochondrial membrane potential and ATP levels in early stages of OGD/reperfusion. All of the E2 effects were blocked by the ER antagonist, ICI-182,780. These findings indicate that E2 can preserve endothelial mitochondrial function and provide protection against ischemic injury through ER-mediated mechanisms.
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影响因子:
2.4
作者:
Nilsen, Jon;Chen, Shuhua;Irwin, Ronald W.;Iwamoto, Sean;Brinton, Roberta Diaz
通讯作者:
Brinton, Roberta Diaz
DOI:
10.1038/jcbfm.2008.116
发表时间:
2009-02
期刊:
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism
影响因子:
--
作者:
通讯作者:
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影响因子:
4.8
作者:
Dubal, Dena B.;Rau, Shane W.;Wise, Phyllis M.
通讯作者:
Wise, Phyllis M.
DOI:
10.1097/01.wcb.0000091762.61714.fe
发表时间:
2003-11-01
影响因子:
6.3
作者:
Andjelkovic, AV;Stamatovic, SM;Keep, RF
通讯作者:
Keep, RF
影响因子:
2.9
作者:
Liu, R;Wen, Y;Yang, SH
通讯作者:
Yang, SH