ObjectiveToinvestigatetheprotectiveeffectsoftotalglucosideofPicrorhizascrophulariflora(TGP)on intrahepatic cholestasis induced by α-naphthylisothiocyanate (ANIT) in ICR mice. Methods TGP (0.33~9 mg·kg-1 per day) were injectively given to experimental mice for five consecutive days. A single dose of ANIT (80 mg·kg-1) was orally given to mice on the third day to induce intrahepatic cholestasis. All animals were killed on 2 h after TGP final administration. The levels of serum ALT,AST,ALB,ALP,TBIL,DBIL and TBA were measured by automatic chemistry analyzer (TBA-40FR). Liver histopathological changes were examined by H.E and light microscopy. Results ANIT 80 mg·kg-1 could induced significant liver damage and jaundice, expressed in the higher serum ALT,AST, ALP,TBIL,DBIL,TBA activities and the apoptosis or bile canaliculus injury in liver tissue. TGF injection (0.33~9 mg·kg-1) showed significantly protective effects to liver damage and jaundice induced by ANIT. Compared with the model group, TGP could significantly reduce the elevated serum ALT,AST,ALP,TBIL,DBIL,TBA and relieve the liver pathological injury. There is a dose-dependent relationship between 0.33~3 mg·kg-1 dose range. Conclusion TGP injection showed the significant action of reducing serum bilirubin and transaminase and improving liver tissue injury of experimental cholestasis induced by ANIT. The optimum doses are 1~3 mg·kg-1. It should be careful to make the dose choice in clinical trial.%目的：利用α-萘异硫氰酸酯（α-Naphthylisothiocyanate, ANIT）引起的胆汁淤积性肝损伤模型，考察注射用胡黄连总苷的保肝退黄活性。方法注射用胡黄连总苷静脉注射给予ICR小鼠（0.33~9mg·kg-1，1次/天×5天），在第3次给药后2 h口服给予ANIT 80 mg·kg-1一次，建立胆汁淤积性黄疸模型。末次给药后2 h处理动物，制备血清，全自动生化分析仪检测血清ALT、AST、ALB、ALP、TBIL、DBIL及TBA水平，H.E.染色考察肝脏病理状态。结果ANIT 80 mg·kg-1引起小鼠显著的肝损伤及黄疸，血清ALT、AST、ALP、TBIL、DBIL及TBA水平均显著升高，肝组织细胞凋亡、胆管细胞受损。注射用胡黄连总苷0.33~9 mg·kg-1对ANIT引起的胆汁淤积性黄疸具显著的阻抑活性，能够降低血清转氨酶水平和胆红素及胆汁酸水平，改善肝脏病理状态。0.33~3 mg·kg-1剂量范围内显示一定量效关系。结论注射用胡黄连总苷在0.33~9 mg·kg-1范围内对ANIT引起的小鼠黄疸具显著的保肝退黄作用，1~3 mg·kg-1剂量范围内活性最佳，值得临床试验参考。
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