丹参酮ⅡA对血管紧张素Ⅱ诱导的大鼠心肌间质成纤维细胞α-平滑肌动蛋白表达的影响Effect of Tanshinone Ⅱ A on the Expression of α -smooth Muscle Actin in Interstitial Fibroblast α smooth Muscle Actin of Rat Induced by Angiotensin Ⅱ
冯俊,陈华文,李树生
摘要(Abstract):
目的研究丹参酮ⅡA(TanⅡA)对血管紧张素Ⅱ(AngⅡ)诱导的大鼠心肌间质成纤维细胞α-平滑肌动蛋白(SMA)表达的影响。方法体外培养大鼠心肌间质成纤维细胞,分为正常对照组、AngⅡ刺激组和TanⅡA干预组。免疫荧光法和Western免疫印迹法检测各组转分化肌成纤维细胞中标志蛋白α-平滑肌动蛋白(α-SMA)的表达。结果免疫荧光检测显示,细胞培养24 h后对照组胞浆中仅有少量α-SMA表达,而经AngⅡ作用后,α-SMA表达量明显增多。AngⅡ干预心肌间质成纤维细胞不同时间点,Western免疫印迹法显示α-SMA表达量逐渐增加。AngⅡ的这种诱导心肌间质成纤维细胞发生肌成纤维细胞转分化作用可被含TanⅡA的培养液所抑制,且呈剂量和时间依赖性。结论 TanⅡA能有效地抑制大鼠心肌间质成纤维细胞的转分化,此作用可能与其能下调AngⅡ诱导的α-SMA过表达有关。
关键词(KeyWords): 丹参酮ⅡA;成纤维细胞;转分化;α-平滑肌动蛋白
基金项目(Foundation): 国家自然科学基金资金项目(81202825);; 湖北省自然科学基金资金项目(2012FFB02410)
作者(Author): 冯俊,陈华文,李树生
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