Cellular and molecular mechanisms of 17beta-estradiol postconditioning protection against gastric mucosal injury induced by ischemia/reperfusion in rats

Life Sciences
Dong-Shu DuYu Li

Abstract

To investigate the protective effects of 17beta-estradiol postconditioning against ischemia/reperfusion (I-R)-induced gastric mucosal injury in rats. The animal model of gastric ischemia/reperfusion was established by clamping of the celiac artery for 30 min and reperfusion for 30 min, 1h, 3h, 6h, 12h or 24h. 17beta-estradiol at doses of 5, 50 or 100 microg/kg (rat) was administered via peripheral veins 2 min before reperfusion. In a subgroup of rats, the estrogen receptor antagonist fulvestrant (Ful, 2mg/kg) was intravenously injected prior to 17beta-estradiol administration. Histological and immunohistochemical methods were employed to assess the gastric mucosal injury index and gastric mucosal cell apoptosis and proliferation. The malondialdehyde (MDA) concentration, superoxide dismutase (SOD) activity, xanthine oxidase (XOD) activity and hydroxyl free radical (-OH) inhibitory ability were determined by colorimetric assays. Subsequently, the expression of Bcl-2 and Bax in rat gastric mucosa was examined by western blotting. 17beta-estradiol dose-dependently inhibited gastric I-R (GI-R) injury, and 17beta-estradiol (50 microg/kg) markedly attenuated GI-R injury 1h after reperfusion. 17beta-estradiol inhibited gastric mucosal ...Continue Reading

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Citations

Feb 5, 2013·Journal of Molecular Histology·Minghui ZhouChunquan Zheng
Apr 13, 2011·World Journal of Gastroenterology : WJG·Wei-Li QiaoChang-Dong Yan
Jul 30, 2014·World Journal of Gastroenterology : WJG·Tao WangBo-Hua Wu
Jan 3, 2013·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·D S DuJ Wang
Jul 5, 2011·Journal of Ethnopharmacology·F F B P FreitasF A Oliveira
Sep 27, 2012·Menopause : the Journal of the North American Menopause Society·Shu-Mien ChuangYung-Shun Juan

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