title: Isolation and characterization of tissue inhibitors of metalloproteinases (TIMP-1 and TIMP-2) from human rheumatoid synovial fluid.
abstract: The tissue inhibitors of metalloproteinases TIMP-1 and TIMP-2 were purified to apparent homogeneity from human rheumatoid synovial fluid (HRSF). The inhibitors were isolated by dissociation of non-covalent gelatinase/TIMP complexes. TIMP-1 migrated as a single polypeptide with Mr 28,500 on SDS-PAGE, while the Mr of TIMP-2 was 21,000. The inhibitory activity was stable under heat and acid pH. N-terminal sequence data were obtained for the first 15 residues of both inhibitors and showed identity to the human fibroblast inhibitors TIMP-1 and TIMP-2. This is the first demonstration that TIMP-1 and TIMP-2 can be directly purified from human rheumatoid synovial fluid. The complex formation between the metalloproteinase inhibitors and leucocyte metalloproteinases was shown by immunoblotting.
authors.affiliation: University of Bielefeld, Faculty of Chemistry, Department of Biochemistry, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Osthues
authors.forename: V
authors.initials: V
authors.lastname: Knäuper
authors.forename: R
authors.initials: R
authors.lastname: Oberhoff
authors.forename: H
authors.initials: H
authors.lastname: Reinke
authors.forename: H
authors.initials: H
authors.lastname: Tschesche
mesh_terms: D000595:Amino Acid Sequence; D001172:Arthritis, Rheumatoid / Q000378:metabolism*; D015153:Blotting, Western; D004591:Electrophoresis, Polyacrylamide Gel; D006023:Glycoproteins / Q000302:isolation & purification* / Q000378:metabolism; D006801:Humans; D007962:Leukocytes / Q000201:enzymology / Q000378:metabolism; D008666:Metalloendopeptidases / Q000037:antagonists & inhibitors* / Q000378:metabolism; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000302:isolation & purification* / Q000378:metabolism; D013582:Synovial Fluid / Q000737:chemistry*; D019716:Tissue Inhibitor of Metalloproteinase-2; D019714:Tissue Inhibitor of Metalloproteinases
chemical_list: D006023:Glycoproteins; D009363:Neoplasm Proteins; D019714:Tissue Inhibitor of Metalloproteinases; D019716:Tissue Inhibitor of Metalloproteinase-2; D008666:Metalloendopeptidases