Long-term administration of fasudil improves cardiomyopathy in streptozotocin-induced diabetic rats

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• 作者：Sheng-jiang Guan^a ; ¹ ; Zhi-hong Ma^a ; ¹ ; Yan-ling Wu^b ; Jian-ping Zhang^a ; Feng Liang^c ; J. Woodrow Weiss^c ; Qian-yu Guo^a ; Jiang-yan Wang^e ; En-sheng Ji^d ; ^{jesphy@126.com} ; Li Chu^a ; ^{chuli0614@126.com}
• 关键词：ROCK ; Rho kinase ; STZ ; streptozotocin ; BW ; body weight ; HW ; heart weight ; HR ; heart rate ; LVSP ; left ventricular systolic pressure ; LVEDP ; left ventricular end diastolic pressure ; ± ; dp/dtmax ; maximum ascending and descending rates of left ventricula
• 刊名：Food and Chemical Toxicology
• 出版年：2012
• 期刊代码：20_02786915
• 类别：pha
• 出版时间：June, 2012
• 卷：50
• 期：6
• 页码：1874-1882
• 文件大小：1359 K

摘要

Inhibition of Rho kinase (ROCK) has been shown to improve diabetic-related disorders. In this study, the cardio-protective effects and potential mechanisms of fasudil, a selective ROCK inhibitor, on diabetic cardiomyopathy were investigated in a streptozotocin (STZ)-induced diabetic rat model. Eight weeks after diabetes was induced by a single tail vein injection of 60 mg/kg STZ, rats were administered long-term fasudil or captopril as a control over a four-week period. Similar to the effect of captopril, fasudil treatment significantly protected against STZ-induced hemodynamic, histopathologic changes and decreased serum lactate dehydrogenase and creatine phosphokinase. Moreover, fasudil significantly down-regulated ROCK I mRNA expression and ROCK activity, reduced cardiac collagen deposition, and decreased the incidence of apoptosis and ratio of Bax/Bcl-2 protein expression. Additionally, fasudil potently elevated superoxide dismutase activity and suppressed the extent of lipid peroxidation in sera and hearts of diabetic rats. Our findings indicated that long-term treatment with fasudil could improve cardiac dysfunction, attenuate myocardial injury and prevent pathological changes in a rat model of diabetic cardiomyopathy. These effects could be attributed to regulation of antioxidative activities, suppression of myocardial hypertrophy, apoptosis, fibrosis and subsequent cardiac remodeling. These results may help to expand the clinical application of fasudil for diabetic cardiomyopathy.