Studies of immune responses in mice prone to autoimmune disorders. II. Decreased down-regulation by auto-anti-idiotype antibody in autoimmune-prone mice.
Three lines of evidence are presented which suggest that autoimmune-prone mice are deficient in the production of auto-anti-idiotype antibody during their immune response to trinitrophenylated Ficoll (TNP-F). NZB, MRL lpr/lpr and older BXSB male mice have no hapten-augmentable plaque-forming cells (PFC). Hapten-augmentable PFC have been previously shown to be cells whose secretion of antibody has been inhibited by the binding of auto-anti-idiotype antibody to cell surface idiotype. Sera from TNP-F immunized NZB mice lack PFC inhibiting activity (anti-idiotype antibody). Spleen cells from TNP-F immune NZB mice fail to transfer anti-idiotype antibody-mediated suppression to naive mice as do spleen cells from immune non-autoimmune-prone mice. Taken together these data suggest that autoimmune-prone mice are deficient in auto-anti-idiotype antibody-mediated downward regulation of their immune responses. It was further shown that the immune response of NZB mice to TNP-F shows a slower decline in splenic PFC and a greater heterogeneity of PFC affinity than do the responses of non-autoimmune-prone strains. Since athymic (nude) mice, which were previously shown to be defective in the production of auto-anti-idiotype antibody, also show a slower decline in splenic PFC and an increased heterogeneity of PFC affinity, it is suggested that these peculiarities of the immune responses of autoimmune-prone and athymic mice are also the consequences of the lack of auto-anti-idiotype antibody-mediated down-regulation.
D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000276:immunology*; D000915:Antibody Affinity; D001323:Autoantibodies / Q000276:immunology*; D001327:Autoimmune Diseases / Q000276:immunology*; D007116:Immunization, Passive; D007130:Immunoglobulin Idiotypes / Q000276:immunology; D007153:Immunologic Deficiency Syndromes / Q000276:immunology; D008297:Male; D051379:Mice; D008806:Mice, Inbred AKR / Q000276:immunology; D008807:Mice, Inbred BALB C; D008814:Mice, Inbred NZB / Q000276:immunology*; D008819:Mice, Nude / Q000276:immunology*; D013154:Spleen / Q000276:immunology
D000888:Antibodies, Anti-Idiotypic; D001323:Autoantibodies; D007130:Immunoglobulin Idiotypes