title: [The purification of SS-B antigen and detection of anti-SS-B antibodies].
abstract: SS-B antigen was purified from fresh rabbit thymus by ammonium sulfate precipitation and column chromatography with Sephadex G100 and phosphocellulose. The M. W. of SS-B is ranged at 41,000 to 48,000. It does not contain the other extractable antigens, like Sm, RNP, PM-ScL, Scl-70, Jo-1, and PCNA. The purified SS-B antigen only reacts with the CDC standard serum of anti-SS-B antigen only reacts with the CDC standard serum of anti-SS-B antibody by ELISA. The positive rate of the antibodies being 55.1%, 48.3%, 32.8%, 30.8% and 26.3% in SS, SLE, RA, PSS and MCTD respectively. The titers of anti-SS-B antibodies were higher in SS and SLE patients than other connective tissue disease patients. It was found that all of the anti-SS-B antibodies detected were mainly of IgG isotype. Preliminary analysis of clinical date shows that there is no relationship between anti-SS-B antibody and systemic involvement in SS.
authors.affiliation: Peking Union Medical College Hospital, Beijing.
authors.forename: F L
authors.initials: FL
authors.lastname: Tang
authors.forename: X D
authors.initials: XD
authors.lastname: Gan
authors.forename: Y
authors.initials: Y
authors.lastname: Dong
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology; D001323:Autoantibodies / Q000097:blood* / Q000276:immunology; D001324:Autoantigens / Q000737:chemistry / Q000276:immunology / Q000302:isolation & purification*; D002845:Chromatography; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000276:immunology; D008970:Molecular Weight; D012859:Sjogren's Syndrome / Q000276:immunology*
chemical_list: D001323:Autoantibodies; D001324:Autoantigens