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Morphological and Biomechanical Remodeling of the Hepatic Portal Vein in a Swine Model of Portal Hypertension.
MedLine Citation:
PMID:  22192237     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: To obtain the morphological and biomechanical remodeling of portal veins in swine with portal hypertension (PHT), so as to provide some mechanical references and theoretical basis for clinical practice about PHT. METHODS: Twenty white pigs were used in this study, 14 of them were subjected to both carbon tetrachloride- and pentobarbital-containing diet to induce experimental liver cirrhosis and PHT, and the remaining animals served as the normal controls. The morphological remodeling of portal veins was observed. Endothelial nitric oxide synthase expression profile in the vessel wall was assessed at both mRNA and protein level. The biomechanical changes of the hepatic portal veins were evaluated through assessing the following indicators: the incremental elastic modulus, pressure-strain elastic modulus, volume elastic modulus, and the incremental compliance. RESULTS: The swine PHT model was successfully established. The percentages for the microstructural components and the histological data significantly changed in the experimental group. Endothelial nitric oxide synthase expression was significantly downregulated in the portal veins of the experimental group. Three incremental elastic moduli (the incremental elastic modulus, pressure-strain elastic modulus, and volume elastic modulus) of the portal veins from PHT animals were significantly larger than those of the controls (P < 0.05), whereas the incremental compliance of hepatic portal vein decreased. CONCLUSIONS: Our study suggests that the morphological and biomechanical properties of swine hepatic portal veins change significantly during the PHT process, which may play a critical role in the development of PHT and serve as potential therapeutic targets during clinical practice.
Authors:
Xi-Ju He; Tie-Zhu Huang; Pei-Jun Wang; Xing-Chun Peng; Wen-Chun Li; Jun Wang; Jie Tang; Na Feng; Ming-Hua Yu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-21
Journal Detail:
Title:  Annals of vascular surgery     Volume:  -     ISSN:  1615-5947     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8703941     Medline TA:  Ann Vasc Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Annals of Vascular Surgery Inc. Published by Elsevier Inc. All rights reserved.
Affiliation:
Laboratory of Biomechanics, Institute of Basic Medical Sciences, Hubei University of Medicine, Shiyan, China.
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