Abstract:
:Matrix metalloproteinase-9 (MMP-9) plays roles in cancer progression by degrading the extracellular matrix and basement membrane. Many growth factors including Transforming growth factor-beta1 (TGF-beta1) could induce MMP-9 expression. We demonstrated that TGF-beta1 induced MMP-9 mRNA and protein in human head and neck squamous cell carcinoma cell lines. Application of TGF-beta receptor type I inhibitor (SB505124) reduced the MMP-9 expression markedly. Whilst, inhibitor of Myosin light chain kinase (MLCK) could reduce the level of secreted MMP-9 in both the supernatants and cell lysate but not the level of MMP-9 mRNA. These suggested that MLCK might regulate MMP-9 expression post-transcriptionally. Application of SB505124 and siRNA Smad2/3 reduced the phosphorylation of myosin light chain (MLC) suggested that MLC is downstream to TbetaRI/Smad2/3 signaling pathway. In conclusion, these results describe a novel mechanism for the potentiation of TGF-beta1 signaling to induce MMP-9 expression via Smad and MLCK.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Sinpitaksakul SN,Pimkhaokham A,Sanchavanakit N,Pavasant Pdoi
10.1016/j.bbrc.2008.04.128subject
Has Abstractpub_date
2008-07-11 00:00:00pages
713-8issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(08)00822-Xjournal_volume
371pub_type
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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