GPT and Cirrhosis: As shown by the ELISA results (Fig. 6), the increases in the serum levels of the enzymes ALT and AST released by injured hepatocytes in rats with cirrhosis (both P values < 0.001 vs. Control) were alleviated 6 weeks after the grafting of DPSCs with physiological HGF levels (all P values < 0.01) and recovered more significantly in rats treated with DPSCs overexpressing HGF (both P values < 0.05).