RESUMO
Objective To observe the effects of truncated type Ⅱ receptor of TGF ? 1 expressing plasmid on rat liver fibrosis. Methods An eukaryotic expression plasmid of a truncated type Ⅱ receptor of TGF ? 1 was constructed by recombinant DNA technique. Sequence analysis of this recombinant plasmid revealed that it contained the complete extracellular and transmembrane domains of TGF ? 1 Ⅱ receptor but lacked most of the cytoplasmic kinase domain. The recombinant plasmid encapsulated by liposome was transferred into the rats by intraperitoneal injection and its effects on the grade of the pathologic fibrosis and the levels of HA,LN,PCⅢ,Ⅳ C were observed. Results The levels of serum HA,LN,PCⅢ,Ⅳ C were lower in the early treatment group than those in the model control group ( P 0.05). Either in the early or later treatment group, the grade of liver fibrosis was decreased apparently compared with the model control group ( P