Objective To evaluate the influences of different gene delivery routes on exogenous gene expression in liver. Methods Adenoviral vectors carrying genes of hepatic stimulator substance(HSS)-Flag fusion protein were injected into mice through portal or femoral vein. The mice were sacrificed 3 to 7 days after injection and their livers were isolated. Liver injury was evaluated by HE staining as well as the serum levels of alanine aminotransferase(ALT) and aspartate aminotransferase(AST). The expression levels ...