title: Generation of Melan-A/MART-1-specific CD8+ cytotoxic T lymphocytes from human naive precursors: helper effect requirement for efficient primary cytotoxic T lymphocyte induction in vitro.
abstract: This study investigates the generation of primary melanoma cell-specific cytotoxic T lymphocytes (CTLs) in vitro. Induction of peptide-specific CTLs from unfractionated naive peripheral blood mononuclear cells from HLA-A2 healthy donors was assessed using 2 recently described 9-mer epitopes from the melanoma tumor antigen Melan-A/MART-1. The need for help from CD4+ T lymphocytes for the long-lasting induction of CTLs and the capacity of the peptide-induced CTL lines to recognize many melanoma cells were evaluated. CTL lines were obtained reproducibly when CD4+ T-lymphocyte help was provided during the primary stimulation either in an autologous way, in the case of tetanus toxoid antigen (TT) responder donors, or with allogeneic TT-activated T-helper cells, separated by an insert well, in the case of tetanus toxoid non-responder donors. We also investigated helper T-cell-derived factors that are produced by TT-activated lymphocytes. Our results strongly suggest that a complex network of cytokines like interleukin-2 (IL-2), interferon-gamma, IL-6 and IL-1 exerts stimulatory effects for the initiation process of CTLs. In contrast, cytokine-like IL-4 might inhibit generation of cytolytic activity if provided by TT-activated T cells at early stages of induction. Our approach can be used to generate CTLs of a desired specificity for clinical use in adoptive immunotherapy protocols.
authors.affiliation: Laboratoire d'Immunologie des Pathologies Infectieuses et Tumorales, INSERM U445, Institut Cochin de Génétique Moléculaire, Université René Descartes, Paris, France. ostankovitch@icgm.cochin.inserm.fr
authors.forename: M
authors.initials: M
authors.lastname: Ostankovitch
authors.forename: F A
authors.initials: FA
authors.lastname: Le Gal
authors.forename: F
authors.initials: F
authors.lastname: Connan
authors.forename: D
authors.initials: D
authors.lastname: Chassin
authors.forename: J
authors.initials: J
authors.lastname: Choppin
authors.forename: J G
authors.initials: JG
authors.lastname: Guillet
mesh_terms: D000951:Antigens, Neoplasm / Q000276:immunology*; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis*; D003602:Cytotoxicity, Immunologic; D015789:HLA-A2 Antigen / Q000096:biosynthesis; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis; D007963:Leukocytes, Mononuclear / Q000166:cytology / Q000276:immunology*; D008213:Lymphocyte Activation; D058965:MART-1 Antigen; D008545:Melanoma / Q000276:immunology*; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000737:chemistry / Q000276:immunology*; D009842:Oligopeptides / Q000737:chemistry / Q000494:pharmacology; D016133:Polymerase Chain Reaction; D017260:Receptor-CD3 Complex, Antigen, T-Cell / Q000032:analysis; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000032:analysis; D013602:T-Lymphocytes, Cytotoxic / Q000166:cytology / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
chemical_list: D000951:Antigens, Neoplasm; D016207:Cytokines; D015789:HLA-A2 Antigen; D058965:MART-1 Antigen; C548667:MLANA protein, human; D009363:Neoplasm Proteins; D009842:Oligopeptides; D017260:Receptor-CD3 Complex, Antigen, T-Cell; D016693:Receptors, Antigen, T-Cell, alpha-beta; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma