Hai Wang1, Xiao-Ping Chen, Fa-Zu Qiu. 1. Liver Center of Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China.
Abstract
AIM: To determine the role and effect of nitric oxide synthase type II (NOSII) in cirrhotic rats. METHODS: Expression of NOSII mRNA was detected by real time RT-PCR. The activity of nitric oxide synthase and serum levels of NO, systemic and portal hemodynamics and degrees of cirrhosis were measured with high sensitive methods. Chinese traditional medicine tetrandrine was used to treat cirrhotic rats and to evaluate the function of NO. Double-blind method was applied during the experiment. RESULTS: The concentration of NO and the activity of NOS were increased markedly at all stages of cirrhosis, and iNOSmRNA was greatly expressed. Meanwhile the portal-venous-pressure (PVP), and portal-venous-flow (PVF) were significantly increased. NO, NOS and iNOSmRNA were positively correlated to the quantity of hepatic fibrosis. Tetrandrine significantly inhibited NO production and the expression of iNOSmRNA. CONCLUSION: Increased hepatic expression of NOSII is one of the important causes of hepatic cirrhosis and portal hypertension.
AIM: To determine the role and effect of nitric oxide synthase type II (NOSII) in cirrhotic rats. METHODS: Expression of NOSII mRNA was detected by real time RT-PCR. The activity of nitric oxide synthase and serum levels of NO, systemic and portal hemodynamics and degrees of cirrhosis were measured with high sensitive methods. Chinese traditional medicine tetrandrine was used to treat cirrhotic rats and to evaluate the function of NO. Double-blind method was applied during the experiment. RESULTS: The concentration of NO and the activity of NOS were increased markedly at all stages of cirrhosis, and iNOSmRNA was greatly expressed. Meanwhile the portal-venous-pressure (PVP), and portal-venous-flow (PVF) were significantly increased. NO, NOS and iNOSmRNA were positively correlated to the quantity of hepatic fibrosis. Tetrandrine significantly inhibited NO production and the expression of iNOSmRNA. CONCLUSION: Increased hepatic expression of NOSII is one of the important causes of hepatic cirrhosis and portal hypertension.
Authors: R S Lin; F Y Lee; S D Lee; Y T Tsai; H C Lin; R H Lu; W C Hsu; C C Huang; S S Wang; K J Lo Journal: J Hepatol Date: 1995-02 Impact factor: 25.083