Polydatin attenuated liver injury and hepatocyte apoptosis in mice induced 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. Apoptotic cells of liver were detected by means of TUNEL assay (n=5/group). (B) Representative immunofluorescent staining of cleaved-caspase3 (n=5/group). (C-D) Quantification of positive staining areas was measured by Image J software. (E) Caspase3 activity assay of mice liver tissue. Mean SE of results from controls (n=5), MCD diet-fed group (n=7) and PD treatment group (n=8); (F) The protein expression of cleaved-caspase3, caspase3 was examined by Western blot and analysis. # p < 0.05, ###p < 0.001, ####p < 0.0001 vs control mice; *p < 0.05, **p < 0.01 vs mice induced by MCD.