首都医科大学学报 ›› 2006, Vol. 27 ›› Issue (4): 485-487.

• 基础研究 • 上一篇    下一篇

预处置对缺血再灌注大鼠心肌一氧化氮合酶的影响

芦玲巧, 闫丽, 王红霞, 曾翔俊, 郝刚, 江瑛, 朱盈芬, 张立克   

  1. 首都医科大学病理生理学教研室
  • 收稿日期:2005-06-23 修回日期:1900-01-01 出版日期:2006-08-24 发布日期:2006-08-24
  • 通讯作者: 张立克

Effects of Precondition on Nitric Oxide Synthase of Ischemic-reperfusion Myocardium in Rats

Lu Lingqiao, Yan Li, Wang Hongxia, Zeng Xiangjun, Hao Gang, Jiang Ying, Zhu Yingfen, Zhang Like   

  1. Department of Pathophysiology, Capital University of Medical Sciences
  • Received:2005-06-23 Revised:1900-01-01 Online:2006-08-24 Published:2006-08-24

摘要: 目的 观察冠状动脉结扎预处置(CAIP)和股动脉阻断预处置(FIP)对缺血再灌注大鼠心肌一氧化氮合酶(NOS)的影响,探讨NOS在预处置心脏自身保护中的作用.方法 复制心肌缺血/再灌注模型;观察缺血/再灌注期间心脏收缩期左心室内压上升的最大变化速率(+LVdp/dtmax)及舒张期左心室内压下降的最大变化速率(-LVdp/dtmax);采用化学比色法观察大鼠心肌组织诱导型一氧化氮合酶(iNOS)及结构型一氧化氮合酶(cNOS)活性.结果 I/R组缺血60 min及再灌注30 min 2个时段(dp/dtmax均低于sham组(P<0.01);CAIP+I/R及FIP+I/R组均高于I/R组(P<0.01).I/R组心肌cNOS低于sham、CAIP 、CAIP+I/R及FIP+I/R组(P<0.01).I/R组iNOS高于sham、CAIP 、CAIP+I/R组(P<0.01),与FIP+I/R组差异无统计学意义.结论 冠状动脉结扎预处置及股动脉阻断预处置方法均可拮抗心肌缺血及再灌注造成的心功能障碍;心肌缺血预处置拮抗缺血再灌注致心功能损伤的作用可能与其促进cNOS表达和抑制iNOS的激活有关;股动脉阻断预处置可能通过促进cNOS表达而起到延迟保护心脏作用.

关键词: 预处置, 心肌, 缺血/再灌注损伤, 一氧化氮合酶

Abstract: Objective To investigate the effects of coronary artery ligation precondition(CAIP) and femoral ligation precondition(FIP) on nitric oxide synthase in myocardial ischemic reperfusion injury and explore its impact on myocardial protection.Methods Myocardial ischemic/reperfusion model was produced by 60 min ischemic and 30 min reperfusion,observing the change of +LVdp/dtmax and-LVdp/dtmax of the cardiac dynamics,examining the activities of inducible nitric oxide synthase(iNOS) and constrictive nitric oxide synthase(cNOS)of myocardium.Results Compared with group I/R,dp/dtmax increased in group sham,CAIP+I/R and FIP+I/R(P<0.01).The activities of cNOS in group I/R were lower than those in group sham,CAIP,CAIP+I/R and FIP+I/R(P<0.01).Compared with group I/R,the activities of iNOS decreased in group sham,CAIP and CAIP+I/R(P<0.01).Conclusion Two precondition methods of CAIP and FIP resulted in a significant improvement of cardiac functional recovery of the ischemic-reperfusion heart in rats.The cardioprotection of CAIP is possibly related to the changes of cNOS and iNOS,and the cardioprotection of FIP is related to the activity of cNOS.

Key words: precondition, myocardium, ischemic-reperfusion injury, nitric-oxide synthase

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