瑞舒伐他汀对脓毒症大鼠心肌自噬的影响

目的:观察脓毒症心肌损伤大鼠超敏肌钙蛋白I(High-sensitivity troponin I,hsTnI)、心肌过氧化物酶体增殖物激活受体γ辅激活因子1α(peroxisome proliferators-activated receptor-γcoactivator-1α,PGC-1α)、微管相关蛋白1轻链3-II(microtubule-associated protein l light chain 3B,LC3-II)、雷帕霉素靶蛋白(mechanistic target of rapamycin,mTOR)及自噬效应蛋白Beclin-1的水平,探讨瑞舒伐他汀影响脓毒症心肌细胞自噬及减轻心肌损伤的机制.方法:24只清洁级健康雄性Wistar大鼠随机分成假手术组(Sham组)、脓毒症心肌损伤模型组(CLP组)、瑞舒伐他汀给药组(ROS组),每组8只.于手术后24 h分别检测hsTnI、PGC-1α、LC3-II、mTOR及Beclin-1浓度,光镜观察心肌组织病理变化.结果:三组术后24 h hsTnI、PGC-1α、LC3-II、mTOR及Beclin-1浓度间有显著差异(P<0.05);与Sham组比较,术后24 h CLP、ROS组hsTnI[(1524.00±93.97 vs 309.50±31.80 pg/mL)(696.7.±52.61 vs 309.50±31.80 pg/mL)]、PGC-1α[(63.56±9.27 vs 15.92±4.49)(39.18±6.08 vs 15.92±4.49]、LC3-II[(33.09±1.42 vs 17.83±1.47)(40.47±2.55 vs 17.83±1.47)]、mTOR[(29.72±2.15 vs 17.33±1.13)(24.12±1.29 vs 17.33±1.13)]及Beclin-1[(30.48±1.86 vs 20.58±1.68)(41.09±3.22 vs 20.58±1.68)]浓度均升高,差异有统计学意义(P<0.01);与CLP组同期比较,ROS组hsTnI(696.7±52.61 vs 1524.00±93.97 pg/mL)、PGC-1α(39.18±6.08 vs 63.56±9.27)及mTOR(24.12±1.29 vs 29.72±2.15)浓度均明显下降,LC3-II(40.47±2.55 vs 33.09±1.42)及Beclin-1(41.09±3.22 vs 30.48±1.86)浓度升高,差异亦有统计学意义(P<0.05);光镜下CLP组和ROS组存在心肌损害,ROS 组较CLP组心肌损伤有所减轻.结论:瑞舒伐他汀通过影响脓毒症心肌损伤时自噬因子水平,从而减轻心肌损伤.