title: CD4+ proliferative T-cell clones reactive to autologous Epstein-Barr virus-transformed B cells (EBV-LCL) can be restricted by HLA class I molecules.
abstract: In this study, we show that an HLA-loss variant, EBV-LCL .180, which lacks HLA-DR, DP, DQ and B determinants but expresses HLA-A and C molecules, can activate autologous proliferative T cells which recognize EBV-LCL antigens (or LYDMA). T-cell clones isolated from bulk culture (A.180) of T cell primed with autologous variant .180 when tested for their proliferative reactivity to .180 and three autologous class I-loss variants, each lacking specific class I determinants, showed requirement for class I HLA molecules. Clones A.180.Cl and A.180.F3D respond to the A2+, B-null, C+ mutant .53, but not to the A-null, B5+, C+ mutant .144, or the A-null, B-null, C+ mutant .184, indicating that these clones are restricted by an HLA-A2 determinant. These proliferative T-cell clones express the CD4 marker and are noncytotoxic, even in the presence of concanavalin A (Con A) lectin. In coculture experiments, A.180.Cl was further shown to provide lymphokine "help" for EBV-LCL-specific, autologous cytotoxic T-cell clones. These results suggest the repertoire of HLA determinants employed by EBV-LCL-specific proliferative T cells, in addition to the previously shown HLA-DR, DP, and DQ determinants, also includes class I molecules.
authors.affiliation: Department of Human Oncology, University of Wisconsin 53792.
authors.forename: B P
authors.initials: BP
authors.lastname: Chen
authors.forename: R
authors.initials: R
authors.lastname: DeMars
authors.forename: J A
authors.initials: JA
authors.lastname: Hank
authors.forename: P M
authors.initials: PM
authors.lastname: Sondel
mesh_terms: D000943:Antigens, Differentiation / Q000276:immunology*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology*; D000954:Antigens, Surface / Q000276:immunology*; D000956:Antigens, Viral / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology*; D002472:Cell Transformation, Viral; D002999:Clone Cells; D003602:Cytotoxicity, Immunologic; D006680:HLA Antigens / Q000276:immunology*; D004854:Herpesvirus 4, Human / Q000276:immunology*; D006801:Humans; D007156:Immunologic Memory; D008213:Lymphocyte Activation; D008211:Lymphocyte Cooperation; D016169:Lymphocyte Function-Associated Antigen-1; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology*
chemical_list: D000943:Antigens, Differentiation; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D000956:Antigens, Viral; D006680:HLA Antigens; D016169:Lymphocyte Function-Associated Antigen-1