title: T-cell recognition of HLA class II molecules induced by gamma-interferon on a colonic adenocarcinoma cell line (HT29).
abstract: HLA class II molecules may be induced on non-lymphoid cells by gamma-interferon (IFN-gamma). We investigated if HLA class II molecules induced by IFN-gamma on the HT29 colonic carcinoma cell line are functional, i.e. if they may be recognized by allogeneic T cells. We found that IFN-gamma-treated HT29 (HT29IFN) cells could not induce primary proliferative responses of peripheral blood T lymphocytes, nor were they able to induce proliferation in T-lymphocyte clones (TLC) specific for HLA class II molecules found on HT29IFN. However, in the presence of exogenous interleukin 2 (IL-2), 1 of 5 DQw8-specific TLC proliferated when restimulated with HT29IFN, and 3 of these 5 TLC could very effectively inhibit the growth of HT29IFN, probably due to a cytotoxic effect. Both the proliferative response and the cytotoxicity were inhibited by anti-DQ MoAb. We conclude that T cells may recognize HLA-DQ molecules on non-lymphoid cells, which may be of relevance for autoimmune diseases, graft-versus-host disease, and possibly for the recognition of malignant cells.
authors.affiliation: Institute of Transplantation Immunology, National Hospital, Oslo, Norway.
authors.forename: K E
authors.initials: KE
authors.lastname: Lundin
authors.forename: L M
authors.initials: LM
authors.lastname: Sollid
authors.forename: V
authors.initials: V
authors.lastname: Bosnes
authors.forename: G
authors.initials: G
authors.lastname: Gaudernack
authors.forename: E
authors.initials: E
authors.lastname: Thorsby
mesh_terms: D000230:Adenocarcinoma / Q000276:immunology* / Q000473:pathology; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm / Q000032:analysis; D002999:Clone Cells; D003110:Colonic Neoplasms / Q000276:immunology* / Q000473:pathology; D006683:HLA-DQ Antigens / Q000032:analysis / Q000276:immunology; D006684:HLA-DR Antigens / Q000032:analysis; D000949:Histocompatibility Antigens Class II / Q000032:analysis*; D006801:Humans; D007371:Interferon-gamma / Q000494:pharmacology*; D008213:Lymphocyte Activation; D013601:T-Lymphocytes / Q000276:immunology*; D014407:Tumor Cells, Cultured
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D006683:HLA-DQ Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D007371:Interferon-gamma