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Celecoxib inhibits serum amyloid a-induced matrix metalloproteinase-10 expression in human endothelial cells
Yulan Zhao1, Shuli Zhou, Chew-Kiat Heng
1Department of Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
Background:
Although serum amyloid A (SAA) is an established biomarker of coronary artery disease (CAD), its direct role in matrix degradation is obscure. This study investigated the effect of SAA on the expression of matrix metalloproteinase-10 (MMP-10) in endothelial cells. The effect of celecoxib on SAA-dependent MMP-10 expression and its possible mediator were also investigated.
Methods And Results:
From our time course microarray screening, SAA (20 microg/ml) was found to increase MMP-10 mRNA expression over time (4-48 h) in human endothelial cells. Quantitative real-time PCR confirmed this transcriptional induction. Correspondingly, secreted MMP-10 protein was also markedly induced by SAA treatment for 24 h in a dose-dependent manner. We further examined cyclooxygenase-2 (COX-2) and its major product, prostaglandin E(2) (PGE(2)), as possible mediators of MMP-10 induction. Direct PGE(2) treatment could result in MMP-10 induction. Celecoxib, a selective COX-2 inhibitor, suppressed MMP-10 secretion induced by SAA.
Conclusions:
SAA induced MMP-10 expression and celecoxib prevented its induction. MMP-10 induction was at least partly mediated by PGE(2).
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