title: MT1-MMP promotes cell growth and ERK activation through c-Src and paxillin in three-dimensional collagen matrix.
abstract: Membrane-type 1 matrix metalloproteinase (MT1-MMP) is essential for tumor invasion and growth. We show here that MT1-MMP induces extracellular signal-regulated kinase (ERK) activation in cancer cells cultured in collagen gel, which is indispensable for their proliferation. Inhibition of MT1-MMP by MMP inhibitor or small interfering RNA suppressed activation of focal adhesion kinase (FAK) and ERK in MT1-MMP-expressing cancer cells, which resulted in up-regulation of p21(WAF1) and suppression of cell growth in collagen gel. Cell proliferation was also abrogated by the inhibitor against ERK pathway without affecting FAK phosphorylation. MT1-MMP and integrin alpha(v)beta(3) were shown to be involved in c-Src activation, which induced FAK and ERK activation in collagen gel. These MT1-MMP-mediated signal transductions were paxillin dependent, as knockdown of paxillin reduced cell growth and ERK activation, and co-expression of MT1-MMP with paxillin induced ERK activation. The results suggest that MT1-MMP contributes to proliferation of cancer cells in the extracellular matrix by activating ERK through c-Src and paxillin.
authors.affiliation: Department of Molecular Virology and Oncology, Cancer Research Institute, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
authors.forename: Takahisa
authors.initials: T
authors.lastname: Takino
authors.forename: Hisashi
authors.initials: H
authors.lastname: Tsuge
authors.forename: Terumasa
authors.initials: T
authors.lastname: Ozawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sato
mesh_terms: D000081247:CSK Tyrosine-Protein Kinase; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D003094:Collagen / Q000378:metabolism; D004789:Enzyme Activation; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism*; D006367:HeLa Cells; D006801:Humans; D053511:Matrix Metalloproteinase 14 / Q000378:metabolism*; D009369:Neoplasms / Q000201:enzymology / Q000473:pathology*; D051419:Paxillin / Q000378:metabolism*; D011505:Protein-Tyrosine Kinases / Q000378:metabolism*; D019061:src-Family Kinases
chemical_list: D051419:Paxillin; D003094:Collagen; D011505:Protein-Tyrosine Kinases; D000081247:CSK Tyrosine-Protein Kinase; D019061:src-Family Kinases; C000631346:CSK protein, human; D048049:Extracellular Signal-Regulated MAP Kinases; D053511:Matrix Metalloproteinase 14