title: Mutual recognition of parental and F1 lymphocytes. Selective abrogation of cytotoxic potential of F1 lymphocytes by parental lymphocytes.
abstract: Four different combinations of F1 hybrid mice [(C57BL/10 X B10.A)F1, (C57BL/10 X B10.BR)F1, B6D2F1, and AKD2F1] were injected intravenously with spleen cells from parental strains. The T-cell-mediated cytotoxic potential of spleen cells from the injected F1 mice was assessed from 4 to 21 d later by in vitro sensitization with trinitrophenyl-modified parental or syngeneic F1 spleen cells (TNP-self) or with allogeneic spleen cells. The cytotoxic potential of the F1 mice to TNP-self as well as to alloantigens was abolished or severely depressed throughout this period when the respective H-2k,a,d parental spleen cells were injected. In contrast, the cytotoxic potential was unaffected or only marginally reduced when H-2b parental cells were injected. The induction of depressed cytotoxic activity was shown to be a result of a population of parental radiosensitive T lymphocytes. The results should be discussed with respect to (a) the genetic and mechanistic parameters associated with the differential depressive effects of parental cells expressing H-2b vs. H-2k,a,d antigens, and (b) the use of this system for investigating allogeneic receptors on T-lymphocyte populations.
mesh_terms: D000818:Animals; D001921:Brain; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D006649:Histocompatibility Antigens; D006824:Hybridization, Genetic; D007106:Immune Sera; D007165:Immunosuppression Therapy; D007959:Lymphocyte Culture Test, Mixed; D008214:Lymphocytes / Q000276:immunology*; D008297:Male; D051379:Mice; D011817:Rabbits / Q000276:immunology; D013154:Spleen / Q000166:cytology
chemical_list: D000939:Epitopes; D006649:Histocompatibility Antigens; D007106:Immune Sera