title: A CD4+, HLA-DR7-restricted T-helper lymphocyte clone recognizes an antigen shared by human malignant melanoma and glioma.
abstract: CD4(+) Th cells that are restricted by MHC class II molecules play an important role in the induction of antitumor immune responses. We have established a stable CD4(+) Th cell clone (Th35-1A) from the PBMCs of a patient with primary cutaneous melanoma. The Th cell clone is noncytolytic and proliferates specifically in the presence of irradiated autologous melanoma cells or autologous EBV-transformed B cells pulsed with melanoma tumor cell lysates. Th35-1A produces IFN-gamma (a Th1-type cytokine) after autologous tumor cell stimulation, and its proliferative reactivity is HLA class II-restricted. Th cells showed helper activity for PWM responses of PBMCs. Using a panel of HLA class II-matched and unmatched EBV-B cells as APCs and allogeneic melanoma tumor cell lysate as stimulant, DR7 was delineated as the HLA class II restriction element used by the Th cell clone. In agreement with these results, transfection of an allogeneic melanoma cell line with HLA-DR7 isolated from autologous EBV-B cells rendered the cell line stimulatory for Th35-1A cells. Specificity studies using autologous EBV-B cells (EBV-B35) pulsed with a panel of allogeneic tumor cell lysates of various tissue origins indicated that the Th cell clone recognizes an antigen shared by melanoma and glioma cells. The availability of the Th cell clone may lead to the development of new therapies against melanoma, using adoptive Th cell transfer and/or active immunization with a shared Th cell antigen.
authors.affiliation: The Wistar Institute, Philadelphia, PA 19104, USA.
authors.forename: Rajasekharan
authors.initials: R
authors.lastname: Somasundaram
authors.forename: Rolf
authors.initials: R
authors.lastname: Swoboda
authors.forename: Laura
authors.initials: L
authors.lastname: Caputo
authors.forename: Allana
authors.initials: A
authors.lastname: Lee
authors.forename: Naidine
authors.initials: N
authors.lastname: Jackson
authors.forename: Francesco M
authors.initials: FM
authors.lastname: Marincola
authors.forename: DuPont
authors.initials: D
authors.lastname: Guerry
authors.forename: Dorothee
authors.initials: D
authors.lastname: Herlyn
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000951:Antigens, Neoplasm / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D002455:Cell Division; D002461:Cell Line, Transformed; D002472:Cell Transformation, Viral; D002999:Clone Cells; D018920:Coculture Techniques; D016207:Cytokines / Q000378:metabolism; D003602:Cytotoxicity, Immunologic; D005910:Glioma / Q000276:immunology*; D015809:HLA-DR7 Antigen / Q000235:genetics / Q000276:immunology*; D015395:Histocompatibility Antigens Class I / Q000276:immunology; D006801:Humans; D008213:Lymphocyte Activation; D016246:Lymphocytes, Tumor-Infiltrating; D008545:Melanoma / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology; D018417:Th1 Cells / Q000276:immunology*; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D016207:Cytokines; D015809:HLA-DR7 Antigen; D015395:Histocompatibility Antigens Class I