六月青总皂苷对鸭HBV病毒复制的抑制作用

采用鸭乙型肝炎动物模型观察六月青总皂苷抗鸭乙型肝炎病毒与保护肝细胞的作用,实验结果表明,六月青总皂苷(1.0,2.0 g·kg-1.d-1)和3TC(50 mg·kg-1.d-1)能明显抑制DHBV-DNA复制,抑制ALT,AST和DHBsAg水平,改善肝组织病理学损伤。不同于3TC的是六月青总皂苷在停药后仍能显示有抑制病毒的作用,没有出现反跳现象,提示,六月青总皂苷抗病毒的作用机制有别于3TC。实验结果表明六月青总皂苷具有有效抑制DHBV-DNA和保护肝细胞的作用。

Inhibitory effect of total saponins isolated from Taraphochlamys affinis on duck hepatitis B virus replication

It has been previously shown that Taraphochlamys affinis possessed anti-hepatitis B virus (HBV) activities. To identify the active ingredients, the total saponins (TSTA) were isolated from T. affinis and the inhibitory effect of TSTA on HBV in the duck HBV model was examined. The results showed that serum levels of DHBV-DNA decreased in all ducks treated with TSTA (1.0 and 2.0 g x kg(-1) x d(-1)) and lamivudine (3TC) (50 mg x kg(-1) x d(-1)) during treatment, but 7 days after the cessation of treatment (p7) with 3TC, the viral replication level returned to the pretreatment baseline. Contrariwise in ducks treated with TSTA, the effect of DHBV DNA inhibition lasted. Compared with model control group,the alanine aminotransferase (ALT), aspartate aminotransferase (AST) and duck hepatitis B surface antigen (DHBsAg) values of 1.0 and 2.0 g x kg(-1) x d(-1)-dose TSTA groups were significantly lower on 7, 14 days after the treatment (d7, d14) and p7, and at p7, the ALT and DHBsAg levels of 2.0 g x kg(-1) x d(-1)-dose TSTA group was significantly lower than that of 3TC group. Furthermore, significant histological improvement was noted in ducklings of TSTA treatment group 7 days after the withdrawal. The study results demonstrate that TSTA possesses potent anti-HBV activity.