丙泊酚预处理对大鼠心肌缺血-再灌注损伤心肌细胞膜ATP酶活性的影响

目的 研究丙泊酚预处理对大鼠心肌缺血-再灌注损伤心肌细胞膜ATP酶活性及心肌组织形态学的影响.方法 40只雄性SD大鼠随机分成五组,每组8只:对照组(C组),缺血-再灌注组(IR组),丙泊酚1组(P1组),丙泊酚2组(P2组),丙泊酚3组(P3组).各组于再灌注60 min后立即取左室心尖部心肌,检测心肌匀浆中心肌细胞膜Na+-K+-ATP、Ca2+-Mg2+-ATP酶活性;光镜下观察心肌组织形态学变化.结果 IR时心肌细胞膜Na+-K+-ATP、Ca2+-Mg2+-ATP酶活性与C组相比明显下降(P<0.01);O1、P2、P3组心肌细胞膜Na+-K+-ATP、Ca2+-Mg2+-ATP酶活性与IR组相比明显升高,但仍低于C组(P<0.05).结论 丙泊酚可以减轻大鼠心肌缺血-再灌注损伤,其机制可能与恢复心肌细胞膜Na+-K+-ATP、Ca2+-Mg2+-ATP酶活性有关.

Effect of propofol preconditioning on activities of ATPase on myocardial cell membrane in rats with myocardial ischemia-reperfusion injury

Objective To investigate the effect of propofol preconditioning on activities of ATPase on myocardial cell membrane in rats with myocardial ischemia-reperfusion injury. Methods Forty Sprague-Dawiey rats were subject to 30 min ischemia and 60 min reperfusion and randomly assigned to five groups, six rats per group: control(C) group; ischernia-reperfusion (IR) group; propofol preconditioning group(P, according to the dosage of propofol, P was assigned to three KM+-ATPase and Ca2+-Mg2+-ATPase of left ventricle myocardial tissue were measured by chemical colorirnetric method. The rnyocardium pathomorphism was observed with light microscopes. Results The activities of Na+-K+-ATPase and Ca2+-Mg2+-ATPase in ischemia-reperfusion group were lower than control group and propofol preconditioning group(P<0. 05 or P<0.01). Conclusion Propofol preconditioning can produced cardioprotective effect against ischemia-reperfusion injury by recovering the ATPase activities of myocardial tissue.