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Moutan cortex extract exerts protective effects in a rat model of cardiac ischemia/reperfusion

机译:牡丹皮提取物在大鼠心脏缺血/再灌注模型中具有保护作用

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摘要

Moutan cortex (MC) is a traditional Chinese medicine with diverse biological effects. The present study was performed to investigate the effects of MC on myocardial ischemia/reperfusion (I/R) in rats and to explore its possible mechanisms. Sprague-Dawley rats were administered MC extract (1.98 g/kg, i.g.) for 14 days and underwent a subsequent open-chest procedure involving 30 min of myocardial ischemia and 60 min of reperfusion. The cardioprotective effect of MC was demonstrated by reduced infarct size and marked improvement in the histopathological examination. The increase in the activity of superoxide dismutase (SOD) and glutathione (GSH) as well as the reduction of malondialdehyde (MDA) indicated that MC effectively promoted the anti-oxidative defense system. Increased anti-oxidative defense was accompanied by decreased release of lactate dehydrogenase (LDH) and creatine kinase (CK). The reduction in TUNEL-positive myocytes demonstrated that MC decreased myocardial apoptosis. The mRNA expression of B cell leukemia-2 (Bcl-2) was upregulated by MC and the ratio of Bcl-2/Bcl-2-associated X protein (Bax) mRNA expression was increased. MC pretreatment decreased the mRNA expression of inducible nitric oxide synthase (iNOS). The data from this study suggest that MC exerted protective effects on acute myocardial I/R injury via anti-oxidative and anti-apoptotic activities.
机译:牡丹皮(MC)是一种具有多种生物学作用的传统中药。进行本研究以研究MC对大鼠心肌缺血/再灌注(I / R)的影响,并探讨其可能的机制。 Sprague-Dawley大鼠接受MC提取物(1.98 g / kg,i.g.)治疗14天,并进行随后的开胸手术,包括30分钟的心肌缺血和60分钟的再灌注。 MC的心脏保护作用通过减小的梗塞面积和在组织病理学检查中的显着改善来证明。超氧化物歧化酶(SOD)和谷胱甘肽(GSH)活性的增加以及丙二醛(MDA)的减少表明MC有效地促进了抗氧化防御系统。抗氧化防御能力的提高伴随着乳酸脱氢酶(LDH)和肌酸激酶(CK)释放的减少。 TUNEL阳性心肌细胞的减少表明MC减少了心肌细胞凋亡。 MC上调了B细胞白血病2(Bcl-2)的mRNA表达,Bcl-2 / Bcl-2相关X蛋白(Bax)mRNA的表达比例增加。 MC预处理可降低诱导型一氧化氮合酶(iNOS)的mRNA表达。这项研究的数据表明,MC通过抗氧化和抗凋亡活性对急性心肌I / R损伤具有保护作用。

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