Effects of emodin treatment on mitochondrial ATP generation capacity and antioxidant components as well as susceptibility to ischemia-reperfusion injury in rat hearts: Single versus multiple doses and gender difference

被引：38

作者：

Du, Y ^{[1
]}

Ko, KM ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Biochem, Hong Kong, Hong Kong, Peoples R China

来源：

LIFE SCIENCES | 2005年 / 77卷 / 22期

关键词：

emodin; myocardial ischemia-reperfusion injury; mitochondrion; glutathione; alpha-tocopherol; ATP;

D O I：

10.1016/j.lfs.2005.03.027

中图分类号：

R-3 [医学研究方法]; R3 [基础医学];

学科分类号：

1001 ;

摘要：

Effects of emodin (EMD) treatment on mitochondrial ATP generation capacity and antioxidant components as well as susceptibility to ischemia-reperfusion (I-R) injury were examined in male and female rat hearts. Isolated-perfused hearts prepared from female rats were less susceptible to I-R injury than those of male rats. I-R caused significant decreases in ATP generation capacity and reduced glutathione (GSH) and alpha-tocopherol (alpha-TOC) levels as well as glutathione reductase, Se-glutathione peroxidase and Mn-superoxide dismutase (SOD) activities. The lower susceptibility of female hearts to myocardial I-R injury was associated with higher levels of GSH and alpha-TOC as well as activity of SOD than those of male hearts. EMD treatment at 3 daily doses (0.6 or 1.2 mmol/kg) could enhance myocardial mitochondrial ATP generation capacity and antioxidant components in both male and female rat hearts, but it only significantly protected against I-R injury in female hearts. Treatment with a single dose of EMD invariably enhanced mitochondrial antioxidant components and protected against I-R injury in both male and female hearts. The gender-dependent effect of EMD treatment at multiple doses may be related to the differential antioxidant response in the myocardium and/or induction of drug metabolizing enzymes in the liver. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：2770 / 2782

页数：13

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