title: Lysis of allogeneic human lymphocytes by nonspecifically activated T-like cells.
abstract: In the generation of cytotoxic effector cells specific for influenza A virus-infected lymphocytes, three donors have given an unusual pattern of lytic activity, killing HLA-mismatched target cells. This has been analyzed in detail for one donor and one of the other two shows similar results. Activation only requires culture in medium between 1 and 4 days and parallels development of cell line K562-directed natural killer cells. Target lymphocytes do not need to be virus-infected and appear to be normal lymphocytes. The effector cells carry the surface markers T3 and T8 defined by OKT3/anti-Leu4 and OKT8/anti-Leu2a monoclonal antibodies, respectively. Unlike HLA class 1-restricted or -directed cytotoxic T cells, neither anti-Leu2a/nor anti-Leu4 blocked killing in the absence of complement. MHM23, a monoclonal antibody specific for the human lymphocyte function antigen, blocked lysis. The results indicate that these effector cells are related to cytotoxic T lymphocytes, but can lyse allogeneic target cells through a different recognition process. There is some specificity because autologous cells were not killed.
mesh_terms: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D001667:Binding, Competitive; D003602:Cytotoxicity, Immunologic; D006680:HLA Antigens; D006801:Humans; D066298:In Vitro Techniques; D009980:Influenza A virus / Q000276:immunology; D007694:Killer Cells, Natural / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D006680:HLA Antigens