title: Cytotoxic T lymphocyte recognition of a xenogeneic major histocompatibility complex antigen expressed in transgenic mice.
abstract: Introduction of a porcine major histocompatability complex (MHC) class I gene (PD1) into the genome of a C57BL/10 (B10) mouse has been shown to lead to cell surface expression of the porcine MHC antigen, SLAPD1 in a transgenic mouse. The PD1 product expressed on spleen cells from the transgenic mice stimulated B10 spleen cells in a mixed lymphocyte culture to generate PD1-specific cytotoxic T lymphocytes (CTL). The CTL were PD1 specific since they lysed transgenic splenic blast cells and PD1-transfected L cells, but not B10 blasts or control L cells. The CTL were L3T4-, Lyt-2+ and their activity was partially inhibited by either anti-Lyt-2 antibody or by anti-swine MHC alloantibodies. The repertoire of responding B10 anti-transgenic CTL was assessed by examining their cross-reactivity on a series of murine allogeneic targets. The B10 anti-transgenic CTL showed some cross-reactivity on conventional allogeneic targets, but reacted strongly on a series of mutant H-2Kbm blast cells. In addition, B10 anti-B6.cH-2bm6 CTL cross-reacted extensively on the transgenic target cells. These results demonstrated that normal B10 CTL possess a repertoire specific for the products of the xenogeneic class I gene PD1, that this repertoire is cross-reactive with the conventional alloreactive CTL repertoire, and that there exists an unanticipated relationship between PD1-specific CTL and CTL specific for Kb mutant determinants.
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000276:immunology; D002460:Cell Line; D003429:Cross Reactions; D003602:Cytotoxicity, Immunologic; D000939:Epitopes / Q000276:immunology; D005818:Genetic Engineering; D007959:Lymphocyte Culture Test, Mixed; D008285:Major Histocompatibility Complex; D051379:Mice; D008815:Mice, Inbred Strains / Q000235:genetics / Q000276:immunology*; D010641:Phenotype; D013154:Spleen / Q000166:cytology; D013552:Swine; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D014183:Transplantation, Heterologous
chemical_list: D000954:Antigens, Surface; D000939:Epitopes