急性心肌梗死大鼠心肌细胞凋亡及凋亡相关蛋白表达的研究

被引:15
作者
尹瑞兴
蔡捷
李佳荃
杨德寨
机构
[1] 广西医科大学心血管病研究所
关键词
心肌梗塞; 脱噬作用; 心肌; 基因,p53; 基因,bcl-2; 基因表达;
D O I
暂无
中图分类号
R542.22 [];
学科分类号
摘要
目的 探讨急性心肌梗死 (AMI)大鼠心肌细胞凋亡及凋亡相关蛋白P5 3、Fas、Bax和Bcl 2的表达。方法 雄性SD大鼠 10 9只 ,其中 10 1只结扎冠状动脉左前降支 ,80只术后存活分入 10个时点 ,每时点 8只 ,另 8只大鼠开胸暴露左冠状动脉但不结扎作假手术组。于AMI后 1、3、6、12及 2 4h和 2、3、5、7及 14d分别以原位末端标记(TUNEL)法和免疫组织化学方法检测心肌细胞凋亡和心肌组织P5 3、Fas、Bax和Bcl 2蛋白的表达。结果  8只假手术大鼠心肌组织仅有少量的凋亡细胞 ,P5 3、Fas和Bcl 2的免疫反应阳性 ,而Bax的免疫反应为阴性。AMI后 1h梗死区周围心肌的凋亡细胞阳性指数开始升高 ,3d达高峰 ,14d仍高于假手术组 ;P5 3、Fas、Bax和Bcl 2分别于 6h、12h、12h和 3h开始升高 ,于 2d、3d、2 4h和 2d达高峰 ,然后逐渐下降 ,14d与假手术组比较差异无显著性意义。结论 AMI大鼠心肌细胞凋亡增加 ,心肌组织的凋亡相关蛋白P5 3、Fas、Bax和Bcl 2的表达也增加
引用
收藏
页码:37 / 40
页数:4
相关论文
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