title: Cell expression of MMP-1 and TIMP-1 in co-cultures of human gingival fibroblasts and monocytes: the involvement of ICAM-1.
abstract: Matrix metalloproteinase-1 (MMP-1) plays an important role in the degradation of collagen in inflammatory diseases. The aim of this study was to investigate the cellular expression of MMP-1 and its inhibitor, tissue inhibitor of metalloproteinase-1 (TIMP-1), in gingival fibroblasts co-cultured with monocytes and the possible mediating role of intercellular adhesion molecule-1 (ICAM-1). In co-cultures, the expression of MMP-1 and TIMP-1 increased in fibroblasts, but not in monocytes, although the number of MMP-1+ and TIMP-1+ adhered monocytes increased. Moreover, ICAM-1 expression in both fibroblasts and adhered monocytes increased. In the presence of an anti-ICAM-1 antibody, the expression of MMP-1 in fibroblasts decreased whereas the number of TIMP-1+ adhered monocytes increased. The p38 MAPK inhibitor SB203580 reduced MMP-1 expression in fibroblasts, as well as ICAM-1 expression in both fibroblasts and adhered monocytes. The results suggest that co-culture with monocytes enhances cellular expression of MMP-1 and TIMP-1 in gingival fibroblasts, and that the increased MMP-1 expression, in contrast to TIMP-1, is partly mediated by the adhesion molecule ICAM-1 and the p38 MAPK signal pathway.
authors.affiliation: Department of Pediatric Dentistry, Karolinska Institutet, Huddinge, Sweden.
authors.forename: Helena
authors.initials: H
authors.lastname: Domeij
authors.forename: Thomas
authors.initials: T
authors.lastname: Modéer
authors.forename: Hernán Concha
authors.initials: HC
authors.lastname: Quezada
authors.forename: Tülay
authors.initials: T
authors.lastname: Yucel-Lindberg
mesh_terms: D000293:Adolescent; D000906:Antibodies / Q000494:pharmacology; D002478:Cells, Cultured; D002648:Child; D002675:Child, Preschool; D018920:Coculture Techniques; D005347:Fibroblasts / Q000378:metabolism*; D005881:Gingiva / Q000166:cytology; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D018799:Intercellular Adhesion Molecule-1 / Q000096:biosynthesis / Q000276:immunology / Q000502:physiology*; D020935:MAP Kinase Signaling System / Q000502:physiology; D020781:Matrix Metalloproteinase 1 / Q000096:biosynthesis*; D009000:Monocytes / Q000378:metabolism*; D011725:Pyridines / Q000494:pharmacology; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000096:biosynthesis*; D048051:p38 Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors
chemical_list: D000906:Antibodies; D007093:Imidazoles; D011725:Pyridines; D019715:Tissue Inhibitor of Metalloproteinase-1; D018799:Intercellular Adhesion Molecule-1; D048051:p38 Mitogen-Activated Protein Kinases; D020781:Matrix Metalloproteinase 1; C093642:SB 203580