Abstract
Hepatocyte growth factor/scatter factor (HGF/SF) contributes to the malignant progression of human gliomas. We investigated the effect of HGF/SF on matrix metalloproteinase-2 (MMP-2), membrane type 1 matrix metalloproteinase (MT1-MMP) and tissue inhibitors of metalloproteinases (TIMPs), expressions of c-Met/HGF receptor-positive human glioblastoma cells. Treatment of U251 human glioblastoma cells with HGF/SF resulted in enhanced secretion of MMP-2 with an increased level of the active form. This was accompanied by enhanced expression (2.5-fold) of mRNA specific for MMP-2. The stimulatory effect of HGF/SF on MMP-2 expression did not occur in the presence of herbimycin A, a protein tyrosine kinase inhibitor. MT1 -MMP, a cell-surface activator of proMMP-2, was also up-regulated by HGF/SF in a dose-dependent manner. By contrast, the level of TIMP- 1 mRNAs was not altered significantly and that of TIMP-2 was reduced mildly by the HGF/SF treatment, suggesting that HGF/SF may eventually modulate a balance between MMP-2 and TIMPs in favor of the proteinase activity in the glioma cell microenvironment. HGF/SF also stimulated MMP-2 expression of other glioblastoma cell lines. Since glioblastomas frequently co-express HGF/SF and its receptor, our results suggest that HGF/SF might contribute to the invasiveness of glioblastoma cells through autocrine induction of MMP-2 expression and activation.
MeSH terms
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Benzoquinones
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Brain Neoplasms / enzymology
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Brain Neoplasms / genetics
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Brain Neoplasms / pathology*
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Disease Progression
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Enzyme Induction / drug effects
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Enzyme Inhibitors / pharmacology
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Epidermal Growth Factor / pharmacology
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Gelatinases / biosynthesis*
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Gelatinases / genetics
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Gene Expression Regulation, Neoplastic / drug effects*
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Glioblastoma / enzymology
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Glioblastoma / genetics
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Glioblastoma / pathology
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Glioma / enzymology
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Glioma / genetics
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Glioma / pathology*
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Hepatocyte Growth Factor / pharmacology*
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Humans
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Lactams, Macrocyclic
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Matrix Metalloproteinase 2
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Matrix Metalloproteinases, Membrane-Associated
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Metalloendopeptidases / biosynthesis*
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Metalloendopeptidases / genetics
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Neoplasm Invasiveness
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Neoplasm Proteins / biosynthesis*
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Neoplasm Proteins / genetics
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Protein-Tyrosine Kinases / antagonists & inhibitors
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Quinones / pharmacology
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RNA, Messenger / biosynthesis
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RNA, Messenger / genetics
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RNA, Neoplasm / biosynthesis
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RNA, Neoplasm / genetics
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Recombinant Proteins / pharmacology
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Rifabutin / analogs & derivatives
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Signal Transduction / drug effects
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Stimulation, Chemical
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Tumor Cells, Cultured
Substances
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Benzoquinones
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Enzyme Inhibitors
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Lactams, Macrocyclic
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Neoplasm Proteins
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Quinones
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RNA, Messenger
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RNA, Neoplasm
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Recombinant Proteins
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Rifabutin
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Epidermal Growth Factor
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Hepatocyte Growth Factor
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herbimycin
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Protein-Tyrosine Kinases
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Gelatinases
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Matrix Metalloproteinases, Membrane-Associated
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Metalloendopeptidases
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Matrix Metalloproteinase 2