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Lysyl oxidase expression in cardiac fibroblasts is regulated by α2β1 integrin interactions with the cellular microenvironment.
- Source :
-
Biochemical and biophysical research communications [Biochem Biophys Res Commun] 2016 Jun 17; Vol. 475 (1), pp. 70-5. Date of Electronic Publication: 2016 May 08. - Publication Year :
- 2016
-
Abstract
- Lysyl oxidase (LOX) catalyzes crosslink formation between fibrillar collagens and elastins and an increase in LOX activity has been associated with cardiac fibrosis following myocardial infarction (MI). It has been previously reported that LOX expression is regulated by growth factors and cytokines including transforming growth factor (TGF-β1); however, it is unclear how the biophysical and biochemical properties of the cellular microenvironment affect LOX expression. In this study, we isolated rat cardiac fibroblasts (CF) and infarct cardiac fibroblasts (ICF), from healthy and 1-week post-MI left ventricular tissue respectively, and cultured them under varied substrate conditions in vitro to assess their influence on LOX expression. Culture of ICF on collagen I-coated plates increased LOX expression versus uncoated plates with an additional increase observed with the presence of TGF-β1. To further investigate the effect of integrin interactions with collagen I on LOX expression, we inhibited the α2β1 integrin from binding to collagen I and found gene and protein expression of LOX to be downregulated. Together, this demonstrates that the interaction of α2β1 integrin to collagen I in the cellular microenvironment can regulate expression of LOX. Further studies investigating additional integrin interactions may identify therapeutic targets for treating cardiac fibrosis.<br /> (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Subjects :
- Animals
Cells, Cultured
Collagen Type I analysis
Fibroblasts metabolism
Fibrosis
Integrin alpha2beta1 analysis
Male
Myocardial Infarction genetics
Myocardial Infarction metabolism
Myocardium cytology
Protein-Lysine 6-Oxidase analysis
Rats
Collagen Type I metabolism
Fibroblasts pathology
Gene Expression Regulation
Integrin alpha2beta1 metabolism
Myocardial Infarction pathology
Myocardium pathology
Protein-Lysine 6-Oxidase genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1090-2104
- Volume :
- 475
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Biochemical and biophysical research communications
- Publication Type :
- Academic Journal
- Accession number :
- 27169768
- Full Text :
- https://doi.org/10.1016/j.bbrc.2016.05.037