Development of liver fibrosis was suppressed after treatement of Polydatin in mice fed by MCD diet. Mice were fed with MCD diet or control diet for 4 weeks. Mice fed with MCD diet were intraperitoneal injected with 5 mg/kg polydatin daily in the period of experiment. (A) Representative histology of immunohistochemical staining of α-SMA and Sirius red staining from controls (n=5), MCD-fed group (n=7) and PD treatment group (n=9). (B) Quantification of positive staining areas was measured by Image J software. (C) The hepatic mRNA levels of Col1α1, TGF-β1 and TIMP1 were measured by q-PCR assay. (D) Hepatic hydroxyproline content. (E) The hepatic expression of α-SMA in mice was examined by Western blot and analysis. # p < 0.05, ## p < 0.01, ###p < 0.001, ####p < 0.0001 vs control mice. *p <0.05, **p < 0.01, ***p <0.001 vs mice induced by MCD; *p < 0.05, ***p <0.001, ****p < 0.0001 vs Control.