己酮可可碱对重度失血性休克大鼠肝脏缺血再灌注后氧自由基的影响

目的探讨已酮可可碱(PTX)对重度失血性休克大鼠肝脏缺血再灌注后氧自由基的影响。方法 48只SD大鼠随机分为4组(n=12):对照组(C组)、单纯休克组(NR组)、乳酸林格液复苏组(LR组)及乳酸林格液联合PTX(25mg/kg)复苏组(LRPTX组)。采用改良Wiggers法制备失血性休克动物模型,分别于休克前(Ts)、处死前(Td)取静脉血检测谷丙转氨酶(ALT)及谷草转氨酶(AST)含量。NR组在休克后即刻、其余组在复苏后4h处死大鼠取肝组织测定过氧化物歧化酶(SOD)活性,丙二醛(MDA)含量,诱导型一氧化氮合酶(iNOS)及NF-κB蛋白表达情况。电镜及光镜下观察各组大鼠肝组织病理变化。结果与C组比较,NR组、LR组和LRPTX组Td时间点静脉血中AST及ALT水平均明显升高(P<0.05);肝组织MDAi、NOS含量明显升高,NF-κB蛋白表达增加,SOD活性降低(P<0.05)。肝组织病理学损伤明显。与LR组比较,LRPTX组静脉血中AST、ALT、MDAi、NOS含量均明显下降,NF-κB蛋白表达减少,SOD活性升高(P<0.05),肝组织病理学损伤减轻。结论 PTX可减少肝脏iNOS生成,抑制NF-κB活化,减少肝脏氧自由基生成,提高SOD活性,降低肝缺血再灌注损伤。

Effect of pentoxifylline on oxygen free radicals in liver as a result of ischemia-reperfusion in rats with severe hemorrhagic shock

Objective To investigate the effects of pentoxifylline(PTX) on oxygen free radicals in liver as a result of ischemia-reperfusion in rats with severe hemorrhagic shock.Method Forty-eight SD rats were randomly divided into four groups(12 each): control group(C),no resuscitation group(NR),Ringer lactate solution(LR)-treatment group(LR),and LR combined PTX(25mg/kg) group(LRPTX).The rat model of severe hemorrhagic shock was established according to Wiggers method.Blood samples were collected at Ts(before shock) ...