Journal
FEBS LETTERS
Volume 579, Issue 25, Pages 5487-5493Publisher
WILEY
DOI: 10.1016/j.febslet.2005.09.012
Keywords
IRF-1; transmigration; MMP-9; STAT1; PTK; signaling
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Cytokines may provide signals for regulating human monocyte matrix metalloproteinase-9 (MMP-9) activity. In this study, we investigated the roles of interferons (IFN) type I/II and transforming growth factor-beta 1 (TGF-beta 1) in MMP-9-mediated invasiveness. MMP-9 antibody and inhibitor, IFNs and TGF-beta 1 inhibited monocyte transmigration through Matrigel. IFNs and TGF-beta 1 downregulated MMP-9 mRNA, protein and activity levels. The inhibitory action of IFNs was associated with the STAT1/IRF-1 pathway since the JAK inhibitor AG490 blocked STAT1 phosphorylation, IRF-1 synthesis and counteracted the blockade of MMP-9 release. TGF-P1-mediated MMP-9 inhibition appeared STAT1/IRF-1-independent but reversed by the protein tyrosine kinase inhibitor tyrphostin 25. Our data point out the importance of IFNs and TGF-beta 1 in the control of monocyte MMP-9-mediated extravasation. (c) 2005 Published by Elsevier B.V. on behalf of the Federation of European Biochemical Societies.
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