title: Comparison of radioimmunoassay and ELISA methods for detection of antibodies to chromatin components.
abstract: A solid phase radioimmunoassay has been compared with an enzyme-linked immunosorbent assay (ELISA) for efficacy in measuring anti-chromatin antibodies. The low backgrounds achieved with the radioimmunoassay method produced a high signal-to-noise ratio and enabled detection of the human test antiserum at a dilution of 1:102,400. By contrast, the ELISA could detect the same antiserum only at a dilution of 1:3200 and above. The radioimmunoassay was consistently more sensitive than the ELISA for detection of anti-chromatin antibodies in a number of human and mouse sera and ascites fluid containing a monoclonal antibody. Factors affecting sensitivity in both assays are discussed.
mesh_terms: D000818:Animals; D000974:Antibodies, Antinuclear / Q000032:analysis*; D000911:Antibodies, Monoclonal / Q000032:analysis; D002843:Chromatin / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D007124:Immunoenzyme Techniques; D008180:Lupus Erythematosus, Systemic / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008815:Mice, Inbred Strains; D011863:Radioimmunoassay / Q000379:methods*; D013205:Staphylococcal Protein A
chemical_list: D000974:Antibodies, Antinuclear; D000911:Antibodies, Monoclonal; D002843:Chromatin; D013205:Staphylococcal Protein A