Journal
WORLD JOURNAL OF GASTROENTEROLOGY
Volume 15, Issue 36, Pages 4529-4537Publisher
BAISHIDENG PUBLISHING GROUP INC
DOI: 10.3748/wjg.15.4529
Keywords
Taurine; Liver cirrhosis; Portal hypertension; Rat
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Funding
- National Natural Science Foundation of China [30660235]
- Guangxi Science Foundation for Youths [0728080]
- National 11th 5-year Support Plan of China [2006BAI0802-07]
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AIM: To investigate the inhibitory effect of natural taurine (NTau) on portal hypertension (PHT) in rats with experimentally-induced liver cirrhosis (LC). METHODS: Experimentally-induced LC Wistar rats (20 rats/group) were treated with either oral saline or oral NTau for 6 consecutive weeks. Evaluation parameters included portal venous pressure (PVP), portal venous resistance (PVR), portal venous flow (PVF), splanchnic vascular resistance (SVR) and mean arterial pressure (MAP). Vasoactive substance levels including nitric oxide (NO), nitric oxide synthase (NOS) and cyclic guanosine monophosphate (cGMP) were also measured. Histological investigation of type I and III collagen (COL I and III) and transforming growth factor-beta(1) (TGF-beta 1) was also performed. RESULTS: Treatment with NTau (1) significantly decreased PVP, PVR and PVF, and increased MAP and SVP; (2) markedly increased the vascular compliance and reduced the zero-stress of the portal vein; (3) markedly decreased the amount of NO and cGMP and activity of NOS; and (4) improved the pathological status of the liver tissue and reduced the expression of COL I, COL III and TGF-beta 1. CONCLUSION: NTau inhibited the LC-induced PHT by improving hyperdynamic circulation, morphology of liver and biomechanical properties of the portal vein in experimentally-induced LC rats. (C) 2009 The WJG Press and Baishideng. All rights reserved.
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