Abstract:
:We investigated whether thrombin, the final activator of coagulation cascade, regulates expression of matrix metalloproteinases (MMP)-9 in human monocytes. We show that thrombin stimulation induced MMP-9 secretion of monocytes dose- and time-dependently as revealed by gelatin zymography. Real-time RT-PCR and Western blot analysis demonstrated that thrombin up-regulated mRNA and protein levels of MMP-9. Pre-incubation with anti-protease-activated receptor (PAR)-1 or anti-PAR-3 antibody partially inhibited the thrombin-induced MMP-9 secretion. Simultaneous incubation with both showed synergistic effect, indicating the involvement of both receptors in this thrombin effect. BAPTA, a Ca(2+) chelator, abolished the thrombin-induced MMP-9 secretion, indicating the requirement of Ca(2+) mobilization in this process. Inhibition of thrombin-induced MMP-9 secretion by either MEK inhibitor or p38 kinase inhibitor revealed that the thrombin effect was mediated by both ERK1/2 and p38 pathways. The activation of NFkappaB by thrombin as demonstrated by electromobility shift assay was also shown to be critical to the thrombin-induced MMP-9 up-regulation.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Chang CJ,Hsu LA,Ko YH,Chen PL,Chuang YT,Lin CY,Liao CH,Pang JHdoi
10.1016/j.bbrc.2009.05.049subject
Has Abstractpub_date
2009-07-24 00:00:00pages
241-6issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(09)00971-1journal_volume
385pub_type
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