Tetrandrine ameliorates cirrhosis and portal hypertension by inhibiting nitric oxide in cirrhotic rats.

Abstract

To examine the role and effect of nitric oxide synthase type II (NOS II) in cirrhotic rats, expression of NOS II mRNA was detected by real time RT-PCR. The enzymatic activity of nitric oxide synthase and the circulating levels of NO, systemic and portal hemodynamics and quantification of cirrhosis were measured. Chinese traditional medicine was used to treat cirrhotic rats and the effect of NO was evaluated. Double-blind method was used in experiment. Our results showed the concentration of NO and the enzymatic activity of NOS increased markedly at all stages of cirrhosis and iNOSmRNA was strongly expressed. Meanwhile, the portal-venous-pressure (PVP) and portal-venous-flow (PVF) were significantly increased. NO, NOS and iNOSmRNA were positively correlated to the degree of hepatic fibrosis. Tetrandrine significantly inhibited NO production and the expression of iNOSmRNA. Our results suggested that increased hepatic expression of NOS II is one of the important factors causing cirrhosis and portal hypertension. Tetrandrine can significantly ameliorate cirrhosis and portal hypertension.

• Authors: Hai Wang, Xiaoping Chen
• Journal: Journal of Huazhong University of Science and Technology. Medical sciences = Hua zhong ke ji da xue xue bao. Yi xue Ying De wen ban = Huazhong keji daxue xuebao. Yixue Yingdewen ban (J Huazhong Univ Sci Technolog Med Sci) Vol. 24 Issue 4 Pg. 385-8, 395 ( 2004) ISSN: 1672-0733 [Print] China
• PMID: 15587405 (Publication Type: Journal Article)

Chemical References

• Alkaloids
• Benzylisoquinolines
• Drugs, Chinese Herbal
• RNA, Messenger
• tetrandrine
• Nitric Oxide
• Nitric Oxide Synthase
• Nitric Oxide Synthase Type II
• Nos2 protein, rat

Topics

• Alkaloids (pharmacology, therapeutic use)
• Animals
• Benzylisoquinolines (pharmacology, therapeutic use)
• Drugs, Chinese Herbal (pharmacology, therapeutic use)
• Hypertension, Portal (drug therapy, metabolism)
• Liver (enzymology, pathology)
• Liver Cirrhosis, Experimental (drug therapy, metabolism)
• Male
• Nitric Oxide (antagonists & inhibitors, blood)
• Nitric Oxide Synthase (biosynthesis, genetics)
• Nitric Oxide Synthase Type II
• RNA, Messenger (biosynthesis, genetics)
• Rats
• Rats, Sprague-Dawley
• Reverse Transcriptase Polymerase Chain Reaction