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Changes in extracellular matrix and in transforming growth factor beta isoforms after coronary artery ligation in rats.
J Mol Cell Cardiol. 2001 Jun; 33(6):1191-207.JM

Abstract

Extensive myocardial remodeling occurs after transmural myocardial infarction (MI). The infarcted myocardium is being replaced by scar tissue after gradual resorption of the necrotic tissue. The remodeling process involves both synthesis and degradation of collagens as major components of the extracellular matrix (ECM). In the present study we have analyzed the time-dependent changes of the processes related to this fibrosis in the infarct area and in the non-infarcted left ventricle (LV) six hours to 82 days after occlusion of the left anterior descending coronary artery (LAD) in rats. We also examined whether changes occurred in the expression pattern of the transforming growth factor (TGF) beta isoforms, since this cytokine is known as powerful inductor of fibrosis. Elevation in colligin expression preceded the pronounced increase in mRNA expression of both type I and type III collagen after MI from day three onwards. The maximal increase in colligin protein in the infarct area coincided with the most pronounced expression of collagen I and collagen III mRNA expression. Also, the expression and activity of matrix metalloproteinases (MMPs) and of tissue inhibitor of matrix metalloproteinase (TIMP)-2 mRNA were increased predominantly in the infarct area. TGF beta(1)and TGF-beta(2)expression increased within the first days after MI, whereas TGF-beta(3)expression was elevated predominantly in the infarct area. This pronounced increase in TGF-beta(3)persisted up to 82 days and correlated positively with the parameters of ECM metabolism. Thus, the scar formation is an ongoing dynamic process in which TGF-beta(3)seems to play an active role in the complex ventricular remodeling.

Authors+Show Affiliations

Carl-Ludwig-Institute of Physiology, University of Leipzig, Germany. deta@medizin.uni-leipzig.deNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11444923

Citation

Deten, A, et al. "Changes in Extracellular Matrix and in Transforming Growth Factor Beta Isoforms After Coronary Artery Ligation in Rats." Journal of Molecular and Cellular Cardiology, vol. 33, no. 6, 2001, pp. 1191-207.
Deten A, Hölzl A, Leicht M, et al. Changes in extracellular matrix and in transforming growth factor beta isoforms after coronary artery ligation in rats. J Mol Cell Cardiol. 2001;33(6):1191-207.
Deten, A., Hölzl, A., Leicht, M., Barth, W., & Zimmer, H. G. (2001). Changes in extracellular matrix and in transforming growth factor beta isoforms after coronary artery ligation in rats. Journal of Molecular and Cellular Cardiology, 33(6), 1191-207.
Deten A, et al. Changes in Extracellular Matrix and in Transforming Growth Factor Beta Isoforms After Coronary Artery Ligation in Rats. J Mol Cell Cardiol. 2001;33(6):1191-207. PubMed PMID: 11444923.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Changes in extracellular matrix and in transforming growth factor beta isoforms after coronary artery ligation in rats. AU - Deten,A, AU - Hölzl,A, AU - Leicht,M, AU - Barth,W, AU - Zimmer,H G, PY - 2001/7/11/pubmed PY - 2001/10/26/medline PY - 2001/7/11/entrez SP - 1191 EP - 207 JF - Journal of molecular and cellular cardiology JO - J Mol Cell Cardiol VL - 33 IS - 6 N2 - Extensive myocardial remodeling occurs after transmural myocardial infarction (MI). The infarcted myocardium is being replaced by scar tissue after gradual resorption of the necrotic tissue. The remodeling process involves both synthesis and degradation of collagens as major components of the extracellular matrix (ECM). In the present study we have analyzed the time-dependent changes of the processes related to this fibrosis in the infarct area and in the non-infarcted left ventricle (LV) six hours to 82 days after occlusion of the left anterior descending coronary artery (LAD) in rats. We also examined whether changes occurred in the expression pattern of the transforming growth factor (TGF) beta isoforms, since this cytokine is known as powerful inductor of fibrosis. Elevation in colligin expression preceded the pronounced increase in mRNA expression of both type I and type III collagen after MI from day three onwards. The maximal increase in colligin protein in the infarct area coincided with the most pronounced expression of collagen I and collagen III mRNA expression. Also, the expression and activity of matrix metalloproteinases (MMPs) and of tissue inhibitor of matrix metalloproteinase (TIMP)-2 mRNA were increased predominantly in the infarct area. TGF beta(1)and TGF-beta(2)expression increased within the first days after MI, whereas TGF-beta(3)expression was elevated predominantly in the infarct area. This pronounced increase in TGF-beta(3)persisted up to 82 days and correlated positively with the parameters of ECM metabolism. Thus, the scar formation is an ongoing dynamic process in which TGF-beta(3)seems to play an active role in the complex ventricular remodeling. SN - 0022-2828 UR - https://www.unboundmedicine.com/medline/citation/11444923/Changes_in_extracellular_matrix_and_in_transforming_growth_factor_beta_isoforms_after_coronary_artery_ligation_in_rats_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022282801913835 DB - PRIME DP - Unbound Medicine ER -