Nitric oxide elicits functional MMP‐13 protein‐tyrosine nitration during wound repair
- 21 May 2008
- journal article
- research article
- Published by Wiley in The FASEB Journal
- Vol. 22 (9), 3207-3215
- https://doi.org/10.1096/fj.07-103804
Abstract
Nitric oxide (NO) plays a critical role in wound healing, in part by promoting angiogenesis. However, the precise repair pathways affected by NO are not well defined. We now show that NO regulates matrix metalloproteinase-13 (MMP-13) release during wound repair. We find that normally MMP-13 is kept inside endothelial cells by an association with caveolin-1. However, nitration of MMP-13 on tyrosine residue Y338 causes it to dissociate from caveolin-1 and be released from endothelial cells. We next explored the functional significance of MMP-13 nitration in vivo. Skin injury increases nitration of MMP-13 in mice. Skin wounds in inducible nitric oxide synthase knockout mice release less MMP-13 and heal more slowly than skin wounds in wild-type mice. Conversely, skin wounds in caveolin-1 knockout mice have increased NO production, increased MMP-13 nitration, and accelerated wound healing. Collectively, our data reveal a new pathway through which NO modulates wound repair: nitration of MMP-13 promotes its release from endothelial cells, where it accelerates angiogenesis and wound healing.—Lizarbe, T. R., García-Ram, C., Tarín, C., Saura, M., Calvo, E., López, J. A., López-Otín, C., Folgueras, A. R., Lamas, S., Zaragoza, C. Nitric oxide elicits functional MMP-13 protein-tyrosine nitration during wound repair.Keywords
Funding Information
- European Commission (FEDER 2FD97–1432)
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