title: Expression of both I-A and I-E/C subregion antigens on accessory cells required for in vitro generation of cytotoxic T lymphocytes against alloantigens or TNBS-modified syngeneic cells.
abstract: We have previously reported that radioresistant, Thy 1-negative accessory cells (SAC) are required for the in vitro generation of cytotoxic T-effector cells to allogeneic or trinitrophenyl-modified syngeneic cells. These SAC were found to provide accessory functions irrespective of whether they were syngeneic, semi-syngeneic, or allogeneic to the responding cells. To further characterize the accessory cells active in CML, the expression of Ia antigens on this functional population was assessed by pretreated SAC with anti-Ia reagents and complement and by testing the accessory cell function of these treated populations. The results of these studies demonstrated that the relevant accessory cells for allogeneic and TNP-self CTL express Ia determinants encoded by genes mapping in the I-A and I-E/C subregions. For the TNP-self CTL the accessory function of both SAC syngeneic or allogeneic to the responding and stimulating cells was specifically abrogated by treatment with anti-Ia reagents and complement.
mesh_terms: D000818:Animals; D002448:Cell Adhesion; D002450:Cell Communication; D003165:Complement System Proteins; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D005815:Genetic Code; D007519:Isoantigens; D008297:Male; D051379:Mice; D008805:Mice, Inbred A; D008810:Mice, Inbred C57BL; D009578:Nitrobenzenes / Q000494:pharmacology*; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D014301:Trinitrobenzenes / Q000276:immunology; D014302:Trinitrobenzenesulfonic Acid / Q000494:pharmacology*
chemical_list: D000939:Epitopes; D007519:Isoantigens; D009578:Nitrobenzenes; D014301:Trinitrobenzenes; D014302:Trinitrobenzenesulfonic Acid; D003165:Complement System Proteins