Please use this identifier to cite or link to this item:
|Title:||Targeted deletion of matrix metalloproteinase-9 attenuates left ventricular enlargement and collagen accumulation after experimental myocardial infarction|
|Authors:||Ducharme, Anique;Frantz, Stefan;Aikawa, Masanori;Rabkin, Elena;Lindsey, Merry;Rohde, Luis E.;Schoen, Frederick Jack;Kelly, Ralph A.;Werb, Zena;Libby, Peter;Lee, Richard Theodore|
|Publisher:||American Society for Clinical Investigation|
|Description:||Matrix metalloproteinase-9 (MMP-9) is prominently overexpressed after myocardial infarction (MI). We tested the hypothesis that mice with targeted deletion of MMP9 have less left ventricular (LV) dilation after experimental MI than do sibling wild-type (WT) mice. Animals that survived ligation of the left coronary artery underwent echocardiographic studies after MI; all analyses were performed without knowledge of mouse genotype. By day 8, MMP9 knockout (KO) mice had significantly smaller increases in end-diastolic and end-systolic ventricular dimensions at both midpapillary and apical levels, compared with infarcted WT mice; these differences persisted at 15 days after MI. MMP-9 KO mice had less collagen accumulation in the infarcted area than did WT mice, and they showed enhanced expression of MMP-2, MMP-13, and TIMP-1 and a reduced number of macrophages. We conclude that targeted deletion of the MMP9 gene attenuates LV dilation after experimental MI in mice. The decrease in collagen accumulation and the enhanced expression of other MMPs suggest that MMP-9 plays a prominent role in extracellular matrix remodeling after MI.|
|Standard no:||Ducharme, Anique, Stefan Frantz, Masanori Aikawa, Elena Rabkin, Merry Lindsey, Luis E. Rohde, Frederick J. Schoen, et al. 2000. “Targeted Deletion of Matrix Metalloproteinase-9 Attenuates Left Ventricular Enlargement and Collagen Accumulation after Experimental Myocardial Infarction.” J. Clin. Invest. 106 (1) (July 1): 55–62. doi:10.1172/jci8768.|
|Appears in Collections:||HMS Scholarly Articles|
Files in This Item:
Click on the URI links for accessing contents.
Items in HannanDL are protected by copyright, with all rights reserved, unless otherwise indicated.