title: Lack of specificity for viral and H-2 antigens by anomalous T killer cells generated in murine leukocyte cultures.
abstract: Mouse spleen cells, cultivated in vitro for 6 days in the presence or absence of syngeneic irradiated virus-induced tumor cells, lysed a variety of virus-induced tumor cells and normal cells in a long (19-hr) 51Cr-release cytotoxicity assay. Little or no specificity for viral or H-2 antigens was detected. This anomalous killing (AK) activity contrasted with H-2-restricted cytotoxic T lymphocyte (CTL) activity generated in secondary mixed leukocyte-tumor cell cultures and detected in a short (4- to 6-hr) 51Cr-release assay. Studies of competitive inhibition by unlabeled target cells in the long assay suggested that AK effectors were a broadly heterogeneous mixture of cells representing many clones, each recognizing a different antigenic determinant. AK effector cells shared properties with CTL: they could be generated from spleen cells of natural killer cell-deficient mice bearing the beige mutation but not from those of T cell-deficient nude mice; they expressed Thy-1 and Lyt-2 antigens; and they were nonphagocytic. AK activity could be generated from normal spleen cells of mice of all inbred strains examined, but the levels of activity generated varied in a strain-specific manner and were not significantly influenced by H-2 genotype.
mesh_terms: D000818:Animals; D000950:Antigens, Ly / Q000235:genetics / Q000276:immunology; D000956:Antigens, Viral / Q000276:immunology*; D001667:Binding, Competitive; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D005260:Female; D006168:Guinea Pigs; D006183:H-2 Antigens / Q000276:immunology*; D007694:Killer Cells, Natural / Q000166:cytology / Q000276:immunology*; D007700:Kinetics; D007959:Lymphocyte Culture Test, Mixed; D008297:Male; D051379:Mice; D008806:Mice, Inbred AKR; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D008817:Mice, Mutant Strains; D008819:Mice, Nude; D010587:Phagocytosis; D011817:Rabbits; D013045:Species Specificity; D013997:Time Factors
chemical_list: D000950:Antigens, Ly; D000956:Antigens, Viral; D000939:Epitopes; D006183:H-2 Antigens