title: Recognition of idiotypes in lymphocyte interactions. I. Idiotypic selectivity in the cooperation between T and B lymphocytes.
abstract: Idiotypic restrictions are demonstrated in vitro for the cooperation between T and B lymphocytes with specificity for Group A streptococcal carbohydrate. T helper cells which have been primed in vivo with anti-idiotypic antibodies to the A5A idiotype and which are therefore essentially A5A idiotype-positive, cooperate only with A5A idiotype-positive B cells, even when mixtures of A5A idiotype-positive and A5A idiotype-negative B cells are present. Essentially A5A idiotype-negative T helper cells that have been primed in vivo with Group A streptococcal vaccine after in vivo suppression with anti-A5A idiotypic antibody are unable to cooperate with B cells which have been primed with anti-A5A idiotype antibody and which are therefore essentially A5A idiotype-positive. Mixtures of A5A idiotype-negative and A5A idiotype-positive T cells cooperate with both A5A idiotype-negative and A5A idiotype-positive B cells. Idiotypic restrictions could not be demonstrated for T and B cells recognizing carrier and hapten determinants, respectively, in experiments in which the cooperation of genetically VH-identical T and B cells was compared to the cooperation of genetically VH-different T and B cells. The data are discussed with respect to various models for the communication between T and B cells. It is proposed that for successful T-B cooperation, ordinarily two types of T helper cells are required, one recognizing the antigen and the other recognizing the idiotype of the B cell.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D001428:Bacterial Vaccines / Q000276:immunology; D000939:Epitopes; D005260:Female; D005838:Genotype; D007130:Immunoglobulin Idiotypes; D007135:Immunoglobulin Variable Region / Q000235:genetics; D007165:Immunosuppression Therapy; D008211:Lymphocyte Cooperation; D008297:Male; D051379:Mice; D008805:Mice, Inbred A; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D013297:Streptococcus pyogenes / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D001428:Bacterial Vaccines; D000939:Epitopes; D007130:Immunoglobulin Idiotypes; D007135:Immunoglobulin Variable Region; D014301:Trinitrobenzenes