title: Suppressor T cells activated in a primary in vitro response to non-major histocompatibility alloantigens.
abstract: Normal mouse spleen cells are not capable of mounting a primary cytotoxic T lymphocyte (Tc) response to non-H-2 alloantigens in vitro, although a good secondary H-2-restricted response is observable after in vivo immunization of the responder animals. Suppressor cells are generated in such a primary responses provided a Mls incompatibility exists between the responder and stimulator. These suppressors are not antigen specific, are Thy-1+, Lyt-1+, 2-, I-J-, and are highly radiosensitive. The suppressor cell precursors in normal spleen express the same phenotype. These suppressor cells are probably implicated in the lack of a primary Tc response in a primary mixed lymphocyte reaction across non-H-2 incompatibilities that include an Mls difference.
mesh_terms: D000818:Animals; D000950:Antigens, Ly / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis; D002454:Cell Differentiation; D002478:Cells, Cultured / Q000276:immunology; D003602:Cytotoxicity, Immunologic; D007111:Immunity, Cellular; D007156:Immunologic Memory; D007519:Isoantigens; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000528:radiation effects; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D000950:Antigens, Ly; D000954:Antigens, Surface; D007519:Isoantigens