title: Anti-tetanus toxoid antibody synthesis after booster immunization in systemic lupus erythematosus. Comparison of the in vitro and in vivo responses.
abstract: The in vivo and in vitro synthesis of anti-tetanus toxoid antibody (anti-tet) was measured after booster immunization with tetanus toxoid in 9 patients with systemic lupus erythematosus (SLE) and 9 controls. In vitro culture of peripheral blood lymphocytes (PBL) from both patients and controls showed maximal anti-tet synthesis 7 days after booster immunization, and maximal serum titers occurred by day 14. The initial in vitro burst of anti-tet synthesis was not dependent upon pokeweed mitogen (PWM) stimulation, whereas later synthesis was PWM dependent. Two differences between patients and controls were observed: 1) patients with SLE had a lower mean pre-boost serum titer of anti-tet, and 2) one-third of the patients showed a blunted serum anti-tet response. To study whether these abnormalities were a result of altered immune regulation, anti-tet synthesis was measured by the coculture of separated SLE-B or control-B cells and separated SLE-T or control-T cell populations (+/- irradiation to remove suppressor T cell activity). These coculture studies showed that both abnormalities were due to a lack of SLE-B cell response, not to abnormalities of SLE-helper T or SLE-suppressor T cell function.
mesh_terms: D000328:Adult; D000907:Antibodies, Bacterial / Q000096:biosynthesis* / Q000302:isolation & purification; D001402:B-Lymphocytes / Q000276:immunology; D002478:Cells, Cultured; D003017:Clostridium tetani / Q000276:immunology*; D005260:Female; D006801:Humans; D007117:Immunization, Secondary; D066298:In Vitro Techniques; D008180:Lupus Erythematosus, Systemic / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D011043:Pokeweed Mitogens / Q000494:pharmacology; D011863:Radioimmunoassay / Q000379:methods; D013601:T-Lymphocytes / Q000276:immunology; D013745:Tetanus Toxoid / Q000276:immunology*; D013997:Time Factors
chemical_list: D000907:Antibodies, Bacterial; D011043:Pokeweed Mitogens; D013745:Tetanus Toxoid