血管紧张素ⅡⅠ型受体阻断剂抑制大鼠缺血-再灌注模型心肌细胞凋亡

被引:19
作者
齐丽彤
张钧华
李大元
周爱儒
机构
[1] 北京医科大学第一医院心内科
[2] 北京医科大学心血管基础研究所
关键词
氯沙坦; 再灌注损伤; 脱噬作用;
D O I
暂无
中图分类号
R542.22 [];
学科分类号
摘要
目的 观察血管紧张素ⅡⅠ型受体阻断剂losartan对大鼠心肌缺血 再灌注模型心肌细胞凋亡及凋亡相关蛋白P53 和Bcl 2表达的影响。方法 Wistar大鼠随机分为三组 :(1)假手术组 (5只 ) ;(2 )缺血 再灌注组 (6只 ) :结扎左冠状动脉 45min ,再灌注 4h ;(3)losartan组 (6只 ) :缺血前 15min和再灌注 1h分别静脉注射losartan 10mg/kg。采用TUNEL和DNA电泳方法检测心肌细胞凋亡 ,免疫组织化学方法检测心肌组织P53 和Bcl 2蛋白表达。结果 缺血 再灌注组凋亡心肌细胞数量为 (2 8.4± 1.4) % ,losartan组凋亡心肌细胞数量显著减少 (10 .3± 2 .1) % ,P <0 .0 1。缺血 再灌注组心肌P53 表达增加。losartan抑制P53 的表达 ,增加Bcl 2表达。结论 缺血 再灌注过程中大鼠心肌细胞可以发生凋亡 ,血管紧张素ⅡⅠ型受体阻断剂可减少心肌细胞凋亡的数量 ,抑制心肌P53 的表达、促进Bcl 2的表达。
引用
收藏
页码:57 / 60
页数:4
相关论文
共 8 条
[1]  
Neuroendocrine activation after myocardial infarction: causes and consequences. Cleband JGF,Cowburn PJ,Morgan K. Heart . 1996
[2]  
P53 and the hypoxia-induced apoptosis of cultured neonatal rat cardiac myocytes. Long X,Boluyt MO,Hipolito M,et al. The Journal of Clinical Investigation . 1997
[3]  
Apoptosis in ischemia and reperfused rat myocardium. Fliss H,Gattinger D. Circulation Research . 1996
[4]  
Over-expression of Bc1-2 gene improves the myocardial tolerance to ischemia reperfussion by preventing DNA fragmentation. Sawa Y. Circulation . 1995
[5]  
Acute myocardial infarction in humans is associated with activation of programmed myocyte cell death in the surviving portion of the heart. Olivetti G,Quaini F,Sala R,et al. Journal of Molecular and Cellular Cardiology . 1996
[6]  
Myocyte apoptosis during acute myocardial infarction in the mouse localizes to hypoxic region but occurs independently of P53. Blalik S,Geenen DL,Sasson IO,et al. The Journal of Clinical Investigation . 1997
[7]  
Angiotensin Ⅱ activates programmed myocyte cell death in vitro. Cigola E,Kajstura J,Li B,et al. Experimental Cell Research . 1997
[8]  
Angiotensin Ⅱreceptor binding following myocardial infarction in the rat. Sun Y,Weber KT. Cardiovascular Research . 1994