title: Characterization of alpha beta+ CD4- CD8- CTL lines isolated from mixed lymphocyte cultures of adult mouse spleen cells.
abstract: Several CD4- CD8- and CD4- CD8+ T cell lines and clones have been isolated from the same mixed lymphocyte cultures. They express the alpha beta T cell receptor, are CD3+, V beta 8- and heat stable antigen-, and exhibit highly specific cytolytic activity mapping to H2Db. However, monoclonal antibody against H2Db failed to block lysis by CD4- CD8- cytotoxic T lymphocytes (CTL). One possible explanation is that the "double negative" cytotoxic T lymphocytes may recognize H2Db in the context of other class I molecules (Qa/Tla). CD4 and CD8 could be detected on some lines cloned in high concentrations of EL4 supernatant and the cell surface expression was influenced by growth conditions. The alpha beta+ CD4- CD8- CTL described in this report are clearly different from the so-called "autoimmune double negatives" which suggests a function for them in normal immune responses.
authors.affiliation: Ontario Cancer Institute, University of Toronto, Canada.
authors.forename: M A
authors.initials: MA
authors.lastname: Skinner
authors.forename: S R
authors.initials: SR
authors.lastname: Sambhara
authors.forename: P
authors.initials: P
authors.lastname: Benveniste
authors.forename: R G
authors.initials: RG
authors.lastname: Miller
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D015704:CD4 Antigens / Q000032:analysis; D016827:CD8 Antigens / Q000032:analysis / Q000276:immunology; D002454:Cell Differentiation; D002460:Cell Line; D002999:Clone Cells; D003470:Culture Media; D005786:Gene Expression Regulation; D015395:Histocompatibility Antigens Class I / Q000276:immunology; D051379:Mice; D008815:Mice, Inbred Strains; D011940:Receptor Aggregation; D013154:Spleen / Q000166:cytology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D015704:CD4 Antigens; D016827:CD8 Antigens; D003470:Culture Media; D015395:Histocompatibility Antigens Class I