摘要
目的 :研究去窦弓神经 (SAD)大鼠心肌组织重构中的细胞凋亡及其相关基因的表达。方法 :10周龄SD大鼠行SAD术或假手术 (Sham) ,术后 16周对SAD及Sham组大鼠的心肌连续切片 ,采用末端标记TUNEL法检测细胞凋亡 ;采用ABC法检测Bcl- 2、Bax、Fas和Fas-L蛋白的表达 ,并用计算机图像分析技术进行观察和比较 ;采用RT -PCR技术检测bcl- 2、bax、fas和fas -L的mRNA的表达。结果 :SAD大鼠心肌细胞凋亡率高于Sham组 ;Bcl- 2蛋白表达少于Sham组 ,Bax、Fas、Fas -L蛋白表达高于Sham组 ,Bcl - 2 /Bax比率低于Sham组 ;RT -PCR结果显示 ,SAD大鼠心肌组织bcl- 2mRNA表达明显少于Sham组 ,而bax、fas、fas-LmRNA表达多于Sham组。结论 :心肌细胞凋亡及其相关基因表达失调参与SAD大鼠的心肌重构。
AIM: To study apoptosis and related genes expressions of cardiomyocytes in sinoaortic-denervated(SAD) rats. METHODS: SAD or sham-operation (Sham) was performed in male SD rats at the age of 10 weeks. After 16 weeks, apoptotic cells were stained in situ by terminal dexynucleotidyl-transferase mediated-dUTP nick end labeling (TUNEL). All stained results were analysised using computer image analysis techniques. Protein products and mRNA of Bcl-2, Bax, Fas and Fas-L were assessed by quantitative immunohistochemistry and RT-PCR. RESULTS: The numbers of apoptotic cardiomyocytes were significantly increased in SAD rats, the expressions of Bcl-2 were significantly decreased, whereas Bax,Fas and Fas-L were significantly increased in SAD rats. THZ]CONCLUSIONCONCLUSION: Apoptosis and dysregulation of gene expressions may be involved in the cardiomyocytes remodeling in SAD rats.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2002年第10期1213-1216,T002,共5页
Chinese Journal of Pathophysiology
基金
国家自然科学基金资助项目 (30 0 70 871)
