Objective To compare the difference of effect on the anti-hepatic injury and fibrosis and the influence of TGF-β/Smad signal transmission pathway with four transfection methods by anti-TGF-β1 siRNA entered target cells.Methods The 50 rats priming TGF-β/Smad signal transmission pathway in the liver tissues were randomly divided into 5 groups: the model control group(group M,n=10),the vena caudalis straight injection group(group V,n=10),the liposome package group(group L,n=10),the hydrodynamics group(group H,n=10) and hepatic artery c...