异甘草酸镁治疗大鼠非酒精性脂肪性肝炎及其作用机制

目的探讨异甘草酸镁对非酒精性脂肪性肝炎（NASH）的治疗作用及其作用机制。方法雄性SD大鼠50只随机分为5组：正常组（N组）普通饲料喂养;模型Ⅰ组（M1组）和模型Ⅱ组（M2组）高脂饲料喂养;异甘草酸镁治疗组（T1组）和饮食治疗组（T2组）在喂饲高脂饲料12周后改为普通饲料喂养,其中T2组同时给予异甘草酸镁120 mg.kg-1.d-1尾静脉注射。12周末处死N和M1组大鼠;16周末处死M2、T1和T2组大鼠。观察各组大鼠肝脏组织病理学改变,并测定各组大鼠肝功能（血清AST、ALT）、脂代谢（血清TC、TG、HDL、LDL-C）及脂质过氧化（肝匀浆MDA、SOD、GSH）指标。结果 12周末M1组大鼠出现NASH,肝脏的脂肪变性程度和炎症活动度均显著增高,TC、TG、LDL-C、MDA明显升高,HDL、SOD和GSH明显降低（P〈0.05）;16周末,M2组大鼠NASH程度进一步加重,并出现AST和ALT的明显升高（P〈0.05）。和M1、M2组相比,T1组脂肪变性和炎症活动程度明显减轻,肝功能、脂代谢和脂质过氧化各项指标均改善（P〈0.05）;而T2组差异无统计学意义（P〉0.05）。结论异甘草酸镁可能通过抗脂质过氧化、调节血脂代谢、抑制炎症反应等作用减轻NASH大鼠肝脂肪变性和炎症,对NASH有治疗作用。

The therapeutic efficacy of magnesium isoglycyrrhizinate on rats with non alcoholic steatohepatitis

Objective To explore the therapeutic efficacy and the mechanism of magnesium isoglycyrrhizinate on rats with non acoholic steatohepatitis.Methods A total of 50 male Srague Dawley rats were randomly assigned into 5 groups.The rats in the control(N) group were fed with common food,the model I(M1) group and model II(M2) groups were fed with high-fat diets,the treatment group(T1) rats were treated with magnesium isoglycyrrhizinate and dietary therapy group(T2) rats were fed with high-fat diets until 12 weeks.Th...