The purpose of this study was to investigate the antifibrotic effects of modified Chai-Hu-Shu-Gan (CHSG) powder, comprised of Chinese herbs, on chemical-induced liver fibrosis in adult Sprague- Dawley rats. Liver fibrosis was induced by carbon tetrachloride (50 %, l.0 mL/kg, by gavage) twice a week for 8 weeks. Carbon tetrachloride-induced rats were randomly assigned to three groups: saline, low dose CHSG (1.26 g/kg) and high dose CHSG (6.30 g/kg), each given by gavage 5 times a week for 8 weeks, starting from the onset of carbon tetrachloride administration. Therapeutic effects were assessed by serum enzyme activities (AST and ALT), histopathological score of liver fibrosis, determination of liver collagen content and immunos-taining against smooth muscle cell α-actin to count the number of stellate cells. The content of α-smooth muscle actin was assayed by western blot, result shows that treatment with CHSG (6.30 g/kg) had a more significant reduction (p<0.05) in the content of AST and ALT (132±38 U/L; 90±26 U/L) than carbon tetrachloride-induced rats receiving saline (240±130 U/L; 142±32 U/L). Liver collagen accumulation was also markedly reduced (p<0.05) by the CHSG (6.30 g/kg) treatment. Histopathological examination revealed that the CHSG (6.30 g/kg) treatment significantly reduced the degree of liver fibrosis. In addition, it is found that the number of α-smooth muscle actin positive stellate cells and the content of α-smooth muscle actin were markedly reduced (p<0.001) by CHSG (6.30 g/kg) treatment. These results show that modified Chai- Hu-Shu-Gan powder has anti-fibrotic effects on a carbon tetrachloride-induced liver fibrosi s rat model. Therefore, anti-fibrotic mechanisms might inhibit stellate cell proliferation and activation.
The purpose of this study was to investigate the antifibrotic effects of modified Chai-Hu-Shu-Gan (CHSG) powder, comprised of Chinese herbs, on chemical-induced liver fibrosis in adult Sprague- Dawley rats. Liver fibrosis was induced by carbon tetrachloride (50 %, l.0 mL/kg, by gavage) twice a week for 8 weeks. Carbon tetrachloride-induced rats were randomly assigned to three groups: saline, low dose CHSG (1.26 g/kg) and high dose CHSG (6.30 g/kg), each given by gavage 5 times a week for 8 weeks, starting from the onset of carbon tetrachloride administration. Therapeutic effects were assessed by serum enzyme activities (AST and ALT), histopathological score of liver fibrosis, determination of liver collagen content and immunos-taining against smooth muscle cell α-actin to count the number of stellate cells. The content of α-smooth muscle actin was assayed by western blot, result shows that treatment with CHSG (6.30 g/kg) had a more significant reduction (p<0.05) in the content of AST and ALT (132±38 U/L; 90±26 U/L) than carbon tetrachloride-induced rats receiving saline (240±130 U/L; 142±32 U/L). Liver collagen accumulation was also markedly reduced (p<0.05) by the CHSG (6.30 g/kg) treatment. Histopathological examination revealed that the CHSG (6.30 g/kg) treatment significantly reduced the degree of liver fibrosis. In addition, it is found that the number of α-smooth muscle actin positive stellate cells and the content of α-smooth muscle actin were markedly reduced (p<0.001) by CHSG (6.30 g/kg) treatment. These results show that modified Chai- Hu-Shu-Gan powder has anti-fibrotic effects on a carbon tetrachloride-induced liver fibrosi s rat model. Therefore, anti-fibrotic mechanisms might inhibit stellate cell proliferation and activation.