title: Allocytotoxic T cell clones: both Leu 2+3- and Leu 2-3+ T cells recognize class I histocompatibility antigens.
abstract: T cell clones were selected which were cytotoxic for human class I major histocompatibility target antigens. Specificity was based on target cell panel studies and inhibition by monoclonal antibodies to class I determinants. Eight clones were Leu 2+3-. The cytotoxicity of these clones was inhibited by antibody to the Leu 2 antigen. Two clones expressed the Leu 2-3+ phenotype and were not inhibited by anti-Leu 2a or anti-Leu 3a antibodies. These studies indicate that class I-specific cytotoxic T cells are distributed in both T cell subsets, though predominantly in the Leu 2+3- group. In addition, these studies suggest that the Leu 3 molecule may not function in identical fashion in Leu 3+ cytotoxic T cells, which recognize class I target antigens, as in those which recognize class II targets.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology / Q000502:physiology; D001667:Binding, Competitive; D002460:Cell Line; D002999:Clone Cells / Q000145:classification / Q000276:immunology; D003602:Cytotoxicity, Immunologic; D000939:Epitopes / Q000276:immunology; D006680:HLA Antigens / Q000145:classification / Q000276:immunology*; D006801:Humans; D010641:Phenotype; D013602:T-Lymphocytes, Cytotoxic / Q000145:classification / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D006680:HLA Antigens