title: Regulation and interactions of MT1-MMP and MMP-20 in human odontoblasts and pulp tissue in vitro.
abstract: MT1-MMP is a cell-membrane-bound metalloenzyme that activates other proMMPs such as proMMP-2 and -13. We studied MT1-MMP expression in mature human odontoblasts and pulp tissue, the regulation of MT1-MMP expression by growth factors TGF-beta1 and BMP-2, and the activation of odontoblast-derived MMP-20 by MT1-MMP. MT1-MMP mRNA is expressed by native and cultured mature human odontoblasts and pulp tissue. Western blot analysis of human odontoblasts and pulp tissue detects 65- and 51-kDa pro- and active forms of MT1-MMP, and smaller truncated MT1-MMP forms. BMP-2 down-regulates MT1-MMP expression in odontoblasts and pulp tissue, while TGF-beta1, alone or with BMP-2, decreases MT1-MMP mRNA levels only slightly. We also demonstrate that MT1-MMP is capable of converting proMMP-20 into a form corresponding to the active MMP-20. In conclusion, this study demonstrates the expression and differential regulation of MT1-MMP in human dentin-pulp complex cells, and the activation of MMP-20 by MT1-MMP.
authors.affiliation: Institute of Dentistry, PO Box 5281, 90014 University of Oulu, Oulu, Finland. palosaar@csc.fi
authors.forename: H
authors.initials: H
authors.lastname: Palosaari
authors.forename: Y
authors.initials: Y
authors.lastname: Ding
authors.forename: M
authors.initials: M
authors.lastname: Larmas
authors.forename: T
authors.initials: T
authors.lastname: Sorsa
authors.forename: J D
authors.initials: JD
authors.lastname: Bartlett
authors.forename: T
authors.initials: T
authors.lastname: Salo
authors.forename: L
authors.initials: L
authors.lastname: Tjäderhane
mesh_terms: D000293:Adolescent; D000328:Adult; D015153:Blotting, Western; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins / Q000502:physiology; D002478:Cells, Cultured; D003782:Dental Pulp / Q000201:enzymology*; D015536:Down-Regulation; D004789:Enzyme Activation; D004792:Enzyme Precursors / Q000378:metabolism*; D018093:Gelatinases / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic; D006801:Humans; D053519:Matrix Metalloproteinase 20; D020782:Matrix Metalloproteinases / Q000378:metabolism*; D053504:Matrix Metalloproteinases, Membrane-Associated; D008666:Metalloendopeptidases / Q000378:metabolism*; D023282:Nuclease Protection Assays; D009804:Odontoblasts / Q000201:enzymology*; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000032:analysis; D011994:Recombinant Proteins / Q000378:metabolism; D012260:Ribonucleases / Q000378:metabolism; D016212:Transforming Growth Factor beta / Q000502:physiology; D053773:Transforming Growth Factor beta1
chemical_list: C525718:BMP2 protein, human; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D004792:Enzyme Precursors; D012333:RNA, Messenger; D011994:Recombinant Proteins; C508960:TGFB1 protein, human; D016212:Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; C499469:recombinant human bone morphogenetic protein-2; D012260:Ribonucleases; D018093:Gelatinases; C507111:MMP20 protein, human; D053519:Matrix Metalloproteinase 20; D020782:Matrix Metalloproteinases; D053504:Matrix Metalloproteinases, Membrane-Associated; D008666:Metalloendopeptidases; C069860:progelatinase