title: Involvement of the p38 mitogen-activated protein kinase pathway in tissue inhibitor of metalloproteinases-1-induced erythroid differentiation.
abstract: We examined the role of the mitogen-activated protein (MAP) kinase pathway in tissue inhibitor of metalloproteinases-1 (TIMP-1)-mediated cellular effects in a human erythroleukemic cell line UT-7. We show that TIMP-1 induced both UT-7 cell erythroid differentiation and proliferation and tyrosine phosphorylation of many intracellular proteins. Using a panel of phosphospecific antibodies, we also demonstrate that phosphorylation of the p38 and c-Jun N-terminal kinases is increased by TIMP-1 whereas phosphorylation of extracellular signal-regulated kinase 1/2 is not induced. Moreover, inhibition of the p38 activity by SB203580 significantly reduces erythroid differentiation induced by TIMP-1, suggesting that the p38 MAP kinase pathway is involved in TIMP-1-induced erythroid differentiation.
authors.affiliation: Laboratoire de Biochimie, CNRS FRE-2260, IFR53 Biomolécules, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France. emmanuelle.petitfrere@univ-reims.fr
authors.forename: E
authors.initials: E
authors.lastname: Petitfrère
authors.forename: Z
authors.initials: Z
authors.lastname: Kadri
authors.forename: C
authors.initials: C
authors.lastname: Boudot
authors.forename: M L
authors.initials: ML
authors.lastname: Sowa
authors.forename: P
authors.initials: P
authors.lastname: Mayeux
authors.forename: B
authors.initials: B
authors.lastname: Haye
authors.forename: C
authors.initials: C
authors.lastname: Billat
mesh_terms: D002454:Cell Differentiation / Q000187:drug effects*; D002455:Cell Division / Q000187:drug effects; D004791:Enzyme Inhibitors / Q000494:pharmacology; D004912:Erythrocytes / Q000166:cytology*; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D004915:Leukemia, Erythroblastic, Acute; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D010766:Phosphorylation; D019000:Phosphotyrosine / Q000378:metabolism; D011725:Pyridines / Q000494:pharmacology; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000494:pharmacology*; D014407:Tumor Cells, Cultured; D048051:p38 Mitogen-Activated Protein Kinases
chemical_list: D004791:Enzyme Inhibitors; D007093:Imidazoles; D011725:Pyridines; D019715:Tissue Inhibitor of Metalloproteinase-1; D019000:Phosphotyrosine; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; C093642:SB 203580