| First Author | Sun M | Year | 2011 |
| Journal | Cardiovasc Res | Volume | 89 |
| Issue | 2 | Pages | 374-83 |
| PubMed ID | 21147810 | Mgi Jnum | J:186029 |
| Mgi Id | MGI:5430854 | Doi | 10.1093/cvr/cvq328 |
| Citation | Sun M, et al. (2011) Cathepsin-L contributes to cardiac repair and remodelling post-infarction. Cardiovasc Res 89(2):374-83 |
| abstractText | AIMS: Cathepsin-L (CTSL) is a member of the lysozomal cysteine protease family, which participates in remodelling of various tissues. Herein, we sought to examine the potential regulation of CTSL in cardiac remodelling post-infarction. METHODS AND RESULTS: Experimental myocardial infarction (MI) was created in CTSL-deficient (Ctsl(-/-)) mice (B6 x FSB/GnEi a/a Ctsl(fs)/J) and wild-type littermates (Ctsl(+/+)) by left coronary artery ligation. At days 3, 7, 14, and 28 post-MI, we monitored survival rate and evaluated cardiac function, morphology, and molecular endpoints of repair and remodelling. Survival was 56% in Ctsl(-/-) mice in contrast to 80% (P < 0.05) in Ctsl(+/+) mice post-MI by day 28. The Ctsl(-/-) mice exhibited greater scar dilatation, wall thinning, and worse cardiac dysfunction when compared with Ctsl(+/+) mice. Cardiac matrix metallopeptidase-9 (MMP-9) activity was also diminished, and c-kit-positive cells, natural killer cells, fibrocytes, and monocytes mobilized to peripheral blood and deposited to the infarcted myocardium were significantly decreased in Ctsl(-/-) mice. Furthermore, the local inflammatory response, and granulocyte-colony stimulating factor, stem cell factor (SCF), and stromal cell-derived factor-1 (SDF-1alpha) expression, as well as cell proliferation, revascularization, and myofibroblast deposition were significantly decreased in Ctsl(-/-) mice compared with Ctsl(+/+) mice. CONCLUSION: Our data indicate that CTSL regulates cardiac repair and remodelling post-MI through a mechanism with multiple pathways. |
