学术论文

      神经调节蛋白1β联合卡托普利对慢性心力衰竭大鼠心肌细胞凋亡及相关基因表达的影响

      Effect of neuregulin-1βcombined with captopril on myocardial cell apop-tosis and related gene expression in rats with chronic heart failure

      摘要:
      目的:探讨神经调节蛋白1β(neuregulin-1,NRG-1β)与卡托普利单用及联合应用对慢性心力衰竭大鼠心肌细胞凋亡及相关基因表达的影响.方法:将青年雄性Sprague-Dawley大鼠随机分为假手术组、心衰组、NRG-1β干预组、卡托普利干预组和联合用药组.采用腹主动脉-腔静脉穿刺造瘘法制备心衰模型.通过血流动力学和血浆BNP水平评价大鼠心功能,TUNEL法检测心肌细胞凋亡指数;Western blot检测各组大鼠左心室心肌p-Akt、Bax和Bcl-2的蛋白水平.结果:与心衰组比较,NRG-1β组、卡托普利组及联合用药组左心室舒张末压、心肌凋亡指数明显降低,±dp/dtmax明显升高,差异有统计学意义(P<0.05);Bax蛋白表达明显降低,p-Akt和Bcl-2蛋白水平明显升高,差异有统计学意义(P<0.05).而与NRG-1β组和卡托普利组相比,联合用药组效果更加显著(P<0.05).结论:神经调节蛋白1β与卡托普利单用及联合应用均可有效改善心功能、抑制心肌细胞凋亡,联合用药的疗效优于单独用药.
      Abstract:
      AIM:To study the effect of neuregulin-1 ( NRG-1β) or captopril alone and their combination on myocardial cell apoptosis and related gene expression in rats with chronic heart failure .METHODS:Young male Sprague-Dawley rats were randomly divided into sham-operated group, heart failure group, NRG-1βgroup, captopril group and combined treatment group .The volume overloaded heart failure model in the rats was established by aortocaval fistula .The cardiac function was evaluated by determining the changes of hemodynamics and plasma BNP level .The apoptotic index ( AI) of myocardial cells was assayed by TUNEL .The protein levels of p-Akt, Bax and Bcl-2 in left ventricular tissue were detected by Western blot .RESULTS: The LVEDP, AI and the expression of Bax were significantly lower in NRG-1βgroup, captopril group and combined treatment group than those in heart failure group ( P<0.05 ) , while the values of ±dp/dtmax and the protein levels of p-Akt and Bcl-2 were significantly higher in NRG-1βgroup, captopril group and com-bined treatment group than those in heart failure group (P<0.05).The effect of combined treatment group was more signifi-cant ( P<0.05) than that in NRG-1βgroup and captopril group .CONCLUSION: Neuregulin-1βor captopril alone and the combination of them effectively improve the cardiac function and inhibit myocardial cell apoptosis in chronic heart failure rats.The therapeutic effect of combination of NRG-1βand captopril is better than that of NRG-1βor captopril alone .
      Author: WANG Xue-hui LIU Hui-bing ZHAO Guo-an
      作者单位: 新乡医学院第一附属医院心血管内科,河南卫辉,453100
      刊 名: 中国病理生理杂志 ISTICPKU
      年,卷(期): 2017, 33(3)
      分类号: R363.2
      在线出版日期: 2017年4月10日
      基金项目: 河南省基础与前沿技术研究计划项目,河南省科技攻关计划项目