异氟烷预处理对心肌缺血再灌注损伤大鼠心肌p38丝裂原活化蛋白激酶水平的影响

2010-08-29 MedSci原创 MedSci原创

复旦学报(医学版) 2010年3期 目的 探讨异氟烷预处理对心肌缺血再灌注大鼠心肌p38丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38 MAPK)水平的影响.方法 雄性Wistar大鼠90只,体重270~390 g.腹腔注射硫代仲丁巴比妥钠150 mg/kg麻醉后,阻断左冠状动脉前降支30 min,再灌注2 h,建立心肌缺血再灌注损

复旦学报(医学版) 2010年3期

目的 探讨异氟烷预处理对心肌缺血再灌注大鼠心肌p38丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38 MAPK)水平的影响.方法 雄性Wistar大鼠90只,体重270~390 g.腹腔注射硫代仲丁巴比妥钠150 mg/kg麻醉后,阻断左冠状动脉前降支30 min,再灌注2 h,建立心肌缺血再灌注损伤模型.取60只大鼠,随机分为6组(n=10),于缺血前CON组静脉注射0.9%生理盐水;SB组经3 min静脉注射p38 MAPK抑制剂SB203580 1.5 mg/kg;DMSO组经3 min静脉注射SB203580溶剂DMSO 0.2 mL;ISO组吸入1.0MAC异氟烷30 min后停止吸入15 min;SB+ISO组和ISO+SB组分别在吸入异氟烷前即刻和吸入异氟烷后即刻静脉注射SB203580 1.5 mg/kg.再灌注2 h后采用氯化硝基四氮唑蓝染色法测定心肌梗死面积.取剩余的30只大鼠,随机分为5组(n=6),CON组、SB组、ISO组、SB+ISO组和 ISO+SB组所有处理同前.缺血前即刻、再灌注后2 h即刻取心肌标本,采用Western blot法测定p38 MAPK的表达水平.结果 与CON组比较,SB组、ISO组、SB+ISO组和ISO+SB组心肌梗死面积降低(P<0.05).再灌注后的CON组和ISO组p38 MAPK水平高于缺血前CON组(P<0.05).结论 异氟烷预处理和p38 MAPK抑制剂SB203580对心肌有保护作用,但p38 MAPK未参与异氟烷预处理减轻大鼠心肌缺血再灌注损伤的机制.

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    2010-08-30 redcrab