Effect of Biejiajian Oral Liquid on the Expression of RAAS in Hepatic Fibrosis Rats

Objective: To study the effect of Biejiajian Oral Liquid (BOL) on the rennin angiotensin aldosterone system (RAAS) in plasma of hepatic fibrosis rats and in hepatic stellate cell (HSC) of normal rats. We explore the mechanism of BOL on inhibiting the activation of HSC and illustrate its mechanism of anti-hepatic fibrosis further. Methods: SD Rats were divided into 5 groups randomly: normal control group, model group, Enalapril group and BOL groups with different concentration (2.0 g/ml or 1.0 g/ml). Every group was administered with CCl4 and olive oil solution to induce hepatic fibrosis except normal one. Each group was treated with the respective drug for 5 weeks and then got the blood. The level of renin, angiotensin II and aldosterone in the plasma of liver fibrosis rats were detected by the radioimmunoassay. By using reverse transcription-polymerase chain reaction (RT-PCR) to measure the gene expression of the rennin, ACE, angiotensinogen, AT1R and ALD. The AT1R gene expression in normal HSC was determined by the immunohistochemical measurement. Results: BOL could effectively reduce the activity of the PRA, AngIIand ALD, which showed a significant effect on the inhibition of the AngII (P < 0.01). Meanwhile, compared with the normal control group, there was a notable inhibitory action on the PRA of HSC which was administrated by serum containing BOL (P < 0.05). And yet, drug applied group showed no difference with the model group for other factors of the RAAS. Conclusion: BOL can inhibit the expression of RAAS in the rat plasma and can inhibit the expression of the mRNA of renin in the normal HSC, which could be the mechanism of anti-hepatic fibrosis.