三七总皂甙对脂肪变性L02肝细胞甘油三酯含量及解耦联蛋白2mRNA表达的影响

目的 观察三七总皂甙(PNS)对脂肪变性L02肝细胞内甘油三酯(TG)含量及解耦联蛋白2(UCP2)mRNA表达的影响及机制.方法 采用50%小牛血清诱导L02肝细胞48 h建立肝细胞脂肪变性模型,采用MTT法测定PNS作用于脂肪变性肝细胞的适宜浓度,随后将其分为5组,模型组、自然恢复组、PNS低剂量组(10 μg/ml)、PNS高剂量组(50 μg/ml),并设正常组.药物作用24 h后,油红O染色观察肝细胞内脂滴变化,全自动生化仪检测肝细胞内TG含量,运用RT-PCR法检测肝细胞内UCP2 mRNA的表达.结果 与正常组比较,油红O染色示模型组肝细胞内橘红色脂滴明显增加,并出现脂滴融合现象,模型组TG含量明显升高(P＜0.01).PNS治疗24 h后,PNS各治疗组与自然恢复组比较,肝细胞内TG含量均明显减少(P＜0.05),以低剂量组下降更为显著(P＜0.01);油红O染色显示,PNS低剂量组肝细胞内脂滴数减少最为明显.与正常组比较,模型组肝细胞UCP2 mRNA的表达明显上调(P＜0.01);与自然恢复组比较,PNS各治疗组肝细胞UCP2 mRNA的表达量均有下降,以高剂量组下降具有显著性差异(P＜0.05).结论 PNS能显著降低脂肪变性肝细胞内TG含量,减轻肝细胞脂肪变性.UCP2 mRNA的高表达与肝细胞脂肪蓄积密切相关,PNS可能是通过下调UCP2 mRNA的表达来改善肝细胞的脂肪变性.

Effects of Panax notoginseng saponins on the content of triglyceride and the expression of UCP2 mRNA in steatotic hepatocytes L02

Objective To study the effects of Panax notoginseng saponins(PNS) on the content of triglyceride(TG) and the expression of uncoupling protein 2(UCP2) mRNA in steatotic hepatocytes L02,so as to explore the possible mechanism.Methods The hepatocytes were cultured by 50% bovine calf serum for 48 h and a model of steatosis hepatocytes L02 was established.The appropriate concentrations of PNS on steatotic hepatocytes were detected by MTT assay.Then the hepatocytes were divided into normal control,model,spontaneo...