Document Detail


Use of tensorial description in tissue remodeling: examples of F-actin distributions in pulmonary arteries in hypoxic hypertension.
MedLine Citation:
PMID:  21608411     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
A molecular configuration tensor Pij was introduced to analyze the distribution of fibrous proteins in vascular cells for studying cells and tissues biomechanics. We have used this technique to study the biomechanics of vascular remodeling in response to the changes of blood pressure and flow. In this paper, the remodeling of the geometrical arrangement of F-actin fibers in the smooth muscle cells in rat's pulmonary arteries in hypoxic hypertension was studied. The rats were exposed to a hypoxia condition of 10% for 0, 2, 12, and 24 hr at sea level. Remodeling of blood vessels were studied at the in vivo state under normal perfusion, no-load state when small rings from blood vessels were excised, and zero-stress state after the rings were cut open radially to release the residual stress. Tissue remodeling in response to changes in blood pressure is reflected in the zero-stress state. The tensor components were determined by analyzing the configuration of phalloidin stained F-actin fibers in the media layer of pulmonary arteries. The values of P31, P32, P33 in the in-vivo state, the no-load state, and the zero-stress state are obtained. This study demonstrated the distributions of fibrous molecules in tissue remodeling can be described quantitatively using the molecular configuration tensor.
Authors:
Wei Huang; Yi Wah Mak; Peter C Y Chen
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Molecular & cellular biomechanics : MCB     Volume:  8     ISSN:  1556-5297     ISO Abbreviation:  Mol Cell Biomech     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-05-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101253756     Medline TA:  Mol Cell Biomech     Country:  United States    
Other Details:
Languages:  eng     Pagination:  91-104     Citation Subset:  IM    
Affiliation:
Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Kowloon, Hong Kong. Wei.Huang@polyu.edu.hk
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