title: Genetic control of the IgG2a response to sheep erythrocytes in mice: isotype- and antigen-specific T cell-mediated suppression in low responders.
abstract: The IgG2a response to sheep erythrocytes is examined in different congenic strains of mice. B10, B6, and C57BL/Ks animals produce a low level of IgG2a antibodies to SRBC during the primary response in vivo. They remain low responders after secondary challenge in vitro. Total spleen cells or nylon-purified T cells from these low responders inhibit the IgG2a response of H-2 compatible-responding mice in a mixed culture system. This suppression is mediated by Thy-1+, Ly-1-, Ly-2+, and I-J+T cells only present in the spleen of low responding animals. These suppressor T cells appear to be IgG2a- and SRBC-specific. Function of non-H-2-linked genes as regulators of suppressor T cells differentiation is discussed.
mesh_terms: D000818:Animals; D000961:Antilymphocyte Serum / Q000494:pharmacology; D004306:Dose-Response Relationship, Immunologic; D000939:Epitopes; D004912:Erythrocytes / Q000276:immunology*; D005260:Female; D007074:Immunoglobulin G / Q000096:biosynthesis* / Q000235:genetics; D007959:Lymphocyte Culture Test, Mixed; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D010641:Phenotype; D012756:Sheep; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000961:Antilymphocyte Serum; D000939:Epitopes; D007074:Immunoglobulin G