title: Role of the H-2 complex in induction of T helper cells in vivo. II Negative selection of discrete subgroups of T cells restricted by I-A and I-A/E determinants.
abstract: Previous studies have shown that negative selection of T cells to sheep erythrocytes (SRC) after adoptive transfer to irradiated mice requires a sharing of H-2 determinants between the donor T cells and the selection hosts. This paper examines which part of the H-2 complex controls selection. The results show that, in the case of T cells of the H-2k haplotype, complete selection occurs with donor host matching limited to the I-A through I-E subregions of the H-2 complex. Selection to SRC was partial in I-A compatible, I-E incompatible hosts, minimal or not detectable in I-A incompatible, I-E compatible hosts, but near-complete in hosts matched at both the I-A and I-E subregions. Consecutive selection in hosts matched solely at (a) the I-A subregion and (b) the I-E subregion led to incomplete selection. From these and other findings it is argued that H-2k T cells comprise a mixture of T cells restricted by I-A and I-A/E hybrid molecules.
mesh_terms: D000818:Animals; D000939:Epitopes; D006183:H-2 Antigens / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006736:Horses; D007116:Immunization, Passive; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D008811:Mice, Inbred DBA; D011828:Radiation Chimera; D012756:Sheep; D013601:T-Lymphocytes / Q000145:classification / Q000276:immunology*
chemical_list: D000939:Epitopes; D006183:H-2 Antigens; D000949:Histocompatibility Antigens Class II