title: Correlation of anti-cytoskeleton antibody activities in synovial fluid with interleukin-6 in patients with osteoarthritis and inflammatory joint disease.
abstract: Synovial fluids and sera from patients with rheumatoid arthritis, psoriatic arthritis, yersinia arthritis, Behçet's syndrome, Crohn's disease, and osteoarthritis were tested for antinuclear antibodies and antibodies to five cytoskeletal components in sensitive enzyme-linked immunosorbent assay (ELISA) systems and for IL-6 concentrations in a proliferation assay (IL-6 dependent hybridoma cell line B13.29, subclone B9). Statistically significant correlations between antibody activities and IL-6 levels were found for vimentin antibodies (r = 0.56; p less than 0.05) and actin antibodies (r = 0.44; p less than 0.05). In patients with chronic and active disease like rheumatoid arthritis and psoriatic arthritis, optical densities measured by vimentin- and actin-ELISA were significantly different from those measured in patients with osteoarthritis. To date only a few reports exist concerning the incidence of antibodies in synovial fluids. We have shown to our knowledge for the first time that IL-6 seems to induce synovial fluid antibody activities restricted to cytoskeletal components of synoviocytes (i.e., vimentin and actin). Synovial fluid antibody activities against vimentin and actin appear to be markers of activity in patients with inflammatory joint disease.
authors.affiliation: I. Medizinische Klinik, Johannes Gutenberg Universität Mainz.
authors.forename: W J
authors.initials: WJ
authors.lastname: Mayet
authors.forename: E
authors.initials: E
authors.lastname: Hermann
authors.forename: M
authors.initials: M
authors.lastname: Bachmann
authors.forename: M
authors.initials: M
authors.lastname: Manns
authors.forename: K H
authors.initials: KH
authors.lastname: Meyer zum Büschenfelde
mesh_terms: D000199:Actins / Q000276:immunology; D000328:Adult; D000368:Aged; D000974:Antibodies, Antinuclear / Q000302:isolation & purification*; D002478:Cells, Cultured; D003599:Cytoskeleton / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007249:Inflammation / Q000276:immunology; D015850:Interleukin-6 / Q000302:isolation & purification*; D007592:Joint Diseases / Q000276:immunology; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000276:immunology*; D013582:Synovial Fluid / Q000276:immunology*; D013583:Synovial Membrane / Q000166:cytology; D014746:Vimentin / Q000276:immunology
chemical_list: D000199:Actins; D000974:Antibodies, Antinuclear; D015850:Interleukin-6; D014746:Vimentin