Simvastatin prevented myocardium of diabetes rats from apoptosis through inhibition of oxidative stress

Zhongguo ying yong sheng li xue za zhi = Zhongguo yingyong shenglixue zazhi = Chinese journal of applied physiology
Fan-Lu LiXiang-Li Cui

Abstract

To investigate the protective effects and the possible mechanisms of simvastatin on myocardial injury induced by diabetes. Twenty-four SD rats (180~220)g were randomly divided into control group (control, n=8) and modeled groups(n=16), the modeled groups were injected with streptozotocin intraperitoneally to induce diabetes. Then the modeled rats were randomly divided into diabetes mellitus group (DM group, n=8) and diabetes mellitus + simvastatin group (DM+S group, n=8). Rats in DM+S group were treated with simvastatin at the dose of 40 mg/(kg·d)by gavage for 4 weeks, and the other two groups were treated with the same amount of saline. At the end of experiments, the heart tissues were collected for further observation. The content of malondialdehyde (MDA) and the activity of superoxide dismutase (SOD) in heart tissues were measured by spectrophotometry; HE staining of rat heart slides was used to observe the pathological changes; TUNEL assay was used to determine the apoptosis index of myocardial cells in each groups; The distribution of p53 in the heart tissues was evaluated by immunohistochemistry; Western blot was used to detect the expressions of p53, p53-phospho-serine 15, Bax and Bcl-2 in the heart tissues. ①Compared wi...Continue Reading

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