title: Idiotypic and anti-idiotypic determinants on lymphocytes during anti-Rh immunization.
abstract: Evolution of idiotypic determinants on lymphocytes membrane and presence of other lymphocytes carrying anti-idiotypic determinants, were studied in Rh negative human volunteer blood donors during immunization towards Rh factor. For this purpose E-Rh Rosettes, direct immunofluorescence, inhibition of E-Rh Rosettes by anti-idiotypic sera as well as EA-Rh Rosettes--induced with Fab'2 fragments from anti-Rh antibodies and lymphocytes from the same subject--were examined and compared to the evolution of circulating antibodies. E-Rh Rosettes preceded or accompanied production of anti-Rh antibodies; their frequency decreased after the fifth month following immunization, meanwhile EA-Rh Rosettes increased in parallel with antibody decrease. The direct immunofluorescence and the inhibition of E-Rh Rosettes, by anti-idiotypic sera, show the presence of idiotypic determinants on lymphocyte membranes; the presence of EA-Rh Rosettes, coinciding with the decrease in antibodies demonstrate the existence of lymphocytes bearing auto-anti-idiotypic determinants.
mesh_terms: D000888:Antibodies, Anti-Idiotypic / Q000096:biosynthesis / Q000276:immunology* / Q000502:physiology; D001402:B-Lymphocytes / Q000276:immunology*; D001667:Binding, Competitive; D001787:Blood Group Incompatibility / Q000097:blood / Q000209:etiology / Q000276:immunology; D000939:Epitopes / Q000276:immunology; D005455:Fluorescent Antibody Technique; D006801:Humans; D007117:Immunization, Secondary; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D008297:Male; D012204:Rh-Hr Blood-Group System / Q000276:immunology*; D012397:Rosette Formation; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000939:Epitopes; D007130:Immunoglobulin Idiotypes; D012204:Rh-Hr Blood-Group System