Document Detail

Discrete microstructural cues for the attenuation of fibrosis following myocardial infarction.
MedLine Citation:
PMID:  25047625     Owner:  NLM     Status:  Publisher    
Chronic fibrosis caused by acute myocardial infarction (MI) leads to increased morbidity and mortality due to cardiac dysfunction. We have developed a therapeutic materials strategy that aims to mitigate myocardial fibrosis by utilizing injectable polymeric microstructures to mechanically alter the microenvironment. Polymeric microstructures were fabricated using photolithographic techniques and studied in a three-dimensional culture model of the fibrotic environment and by direct injection into the infarct zone of adult rats. Here, we show dose-dependent down-regulation of expression of genes associated with the mechanical fibrotic response in the presence of microstructures. Injection of this microstructured material into the infarct zone decreased levels of collagen and TGF-β, increased elastin deposition and vascularization in the infarcted region, and improved functional outcomes after six weeks. Our results demonstrate the efficacy of these discrete anti-fibrotic microstructures and suggest a potential therapeutic materials approach for combatting pathologic fibrosis.
James R Pinney; Kim T Du; Perla Ayala; Qizhi Fang; Richard E Sievers; Patrick Chew; Lawrence Delrosario; Randall J Lee; Tejal A Desai
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-7-18
Journal Detail:
Title:  Biomaterials     Volume:  -     ISSN:  1878-5905     ISO Abbreviation:  Biomaterials     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-7-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8100316     Medline TA:  Biomaterials     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier Ltd. All rights reserved.
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