title: Regulatory mechanisms in cell-mediated immune responses. III. I-region control of suppressor cell interaction with responder cells in mixed lymphocyte reactions.
abstract: Active suppression of mixed lymphocyte reaction (MLR) response is mediated by a soluble factor released by alloantigen-activated murine suppressor cells. Genetic restrictions controlling suppressor factor interaction with MLR responder cells were elucidated in this study. Non-H-2 genetic background was irrelevant to effective interaction. Using congenic strains and strains with intra-H-2 recombinants the genetic locus controlling suppressor T-cell-responder cell interaction was mapped in the I-C or S regions of the H-2 complex. Similarly, recombinant strains were used to exclude the presence of another suppressor cell-responder cell interaction locus in K,I-A, and I-B regions. It thus appears that the I-C subregion of the H-2 complex controls suppressive cell interactions in this T-cell-mediated immune response.
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D005796:Genes; D008040:Genetic Linkage; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D007111:Immunity, Cellular; D007165:Immunosuppression Therapy; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D011995:Recombination, Genetic; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens