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异丙酚在离体鼠心肌再灌注损伤中的保护作用

何荣芝 常业恬 李李 吕志平

  摘要 目的:研究异丙酚在心肌缺血再灌注损伤的作用。方法:采用Langendorff离体鼠心脏模型,将30只SD鼠随机分为5组,每组6只。对照组(C组)用K-H液恒温恒压持续往离体鼠心脏主动脉逆行灌流80分钟;缺血再灌注组(IR组)用K-H液预灌注20分钟,常温全心停灌30分钟,再用K-H液恢复灌注30分钟。50μmol/L异丙酚组(P1组)、25μmol/L异丙酚组(P2组)和脂肪乳剂组(IN组)从预灌第11分钟起改用含相应药液的K-H液灌注10分钟,再停灌30分钟,然后用含相应药液的K-H液恢复灌注30分钟,记录各组预灌10分钟、20分钟及再灌30分钟时心率(HR)、左心室压峰值(LVP)、室内压上升及下降的最大速率(±dp/dtmax)、冠脉流量(CF)以及测定再灌30分钟冠脉流出液里的磷酸肌酸激酶(CK)活性。结果:再灌30分钟时P1组、P2组心功能的恢复明显比I-R组和IN组好(P<0.01),冠脉流出液CK活性明显低于L-R组和IN组(P<0.01),P1组和P2组之间,以及I-R组和IN组之间未显示出统计学差异。结论:25μmol/L和50μmol/L异丙酚都有抗缺血再灌注损伤作用。
  关键词 二异丙酚 心肌再灌注损伤

Protection of propofol against ischemia-reperfusion injury
in isolated rat hearts

He Rongzhi,Chang Yetian,Li Li,et al.Department of Anesthesiology,Second Affiliated Hospital,Hunan Medical University,Changsha 410011

Abstract Objective:To investigate the effect of propofol
on ischemia-reperfusion injury in isolated rat heart with the modified Langredorff model.Method:Thirty rats were divided equally into five groups at random.Rat hearts were perfused with Krebs-Henseleik(K-H)buffer for 70 min at a constant pressure of 7.84kPa and constant temperature of 37℃ in control group(group C)and in the other four groups,a three-phase protocal was performed:(1)20-minute preperfusion,(2)30-minute global normothermic(37℃)ischemia,(3)30-minute reperfusion.Treatment with 50μmol/L propofol(group P1),25μmol/L propofol(group P2),90μg/ml intralipid (group IN)dissolved in K-H buffer started 10 minutes before ischemia and throughout the experiment.Only K-H buffer was perfused in the ischemia-reperfusion group(group I-R).The heart rate(HR)、left ventricular pressure (IVP)and its first derivative(±dp/dtmax)and coronory flow (CF)were recorded at the tenth and twentieth minute of preperfusion,and the 30th minute of reperfusion.Creatin kinase(CK)activity was measured in the coronory effluent at the 30th minute of reperfusion.Result:After 30-minu

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