Résumé
Objective To explore the protective effects and mechanism of shenmaisanjie capsule(SMSJC) combined with methimazole on the L?thyroxine? induced hyperthyroid hepatic damage in rats. Methods so rats were divided into 5 groups randomly as normal group,model group,SMSJC group(0.48 g/kg),methimazole group (12 mg/kg)and combination group. With the exception of the normal group ,all rats were administered L?thyroxine (800 μg/kg ,ig) daily for 6 weeks. Rats were sacrificed. Blood and liver samples were collected for detecting thyroid and liver function , histological analysis and hepatic activity of SOD , GSH?Px and MDA content. Results The levels of T3,T4,FT3,FT4,ALT,AST,ALP,TBIL in serum and hepatic MDA content declined significantly. Hepatic activity of SOD ,GSH?Px increased obviously. Liver morphologic changes improved in methimazole group and combination group,whereas no significant difference of serum FT3,FT4,TSH level and liver activities of SOD and GSH?Px was noticed in SMSJC group in comparison to model group. Compared with SMSJC or methimazole mono?therapy ,the effect of combination therapy was obvious. However ,serum TRAb level was not significantly different in five groups of rats. Conclusion SMSJC combined with methimazole plays a protective role on hyperthyroidism hepatic damage induced by L?thyroxine in rat. It is proposed that the effect is association with inhibiting hepatic oxidative stress.