title: Maternally transmitted target antigen for unrestricted killing by NZB T lymphocytes.
abstract: A new target antigen for unrestricted killing was defined by NZB T lymphocytes which were immunized and restimulated with H-2-identical BALB/c spleen cells. These effector cells killed nearly all target cells tested, irrespective of their H-2 type, but did not kill NZB target cells. The response was shown to have three major components: unrestricted killing specific for Qed-1b, H-2d-restricted killing specific for minor histocompatibility antigens, and unrestricted killing specific for a new antigen, Mta. Mta is present on normal and mitogen-stimulated T and B lymphocytes and on several tumor lines. It was found on cells from 26 mouse strains tested, including two substrains of NZB, representing 9 different H-2 types and 14 different non-H-2 backgrounds. Analysis of the NX8 recombinant inbred lines (derived from Mta-NZB/Icr and Mta+C58/J parents) suggested that Mta is maternally transmitted. This was confirmed by typing of reciprocal F1 hybrids and backcrosses between positive and negative strains: Mta+ females bear Mta+ offspring and Mta- females Mta- offspring, irrespective of the phenotype of the males.
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000235:genetics; D003602:Cytotoxicity, Immunologic; D005260:Female; D008040:Genetic Linkage; D006183:H-2 Antigens / Q000235:genetics; D007111:Immunity, Cellular; D007156:Immunologic Memory; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C / Q000276:immunology; D008814:Mice, Inbred NZB / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000954:Antigens, Surface; D006183:H-2 Antigens