title: Recognition by human Vgamma9/Vdelta2 T cells of melanoma cells upon fusion with Daudi cells.
abstract: Daudi Burkitt's lymphoma cells, unlike other tumor cell lines, stimulate human T cells coexpressing the variable (V) region genes TCRG-V9 and V TCRD-V2 to proliferate and secrete lymphokines. Hybrids, derived by the fusion of Daudi cells with the human melanoma cell line MZ2-MEL 2.2, retain the morphology of melanoma cells. Unlike the parental melanoma cell line, these Daudi x MZ2-MEL 2.2 hybrids stimulate secretion of tumor necrosis factor (TNF) and granulocyte/macrophage colony stimulating factor (GM-CSF) by CD4-positive Vgamma9/Vdelta2 T-cell clones. Whereas the stimulator phenotype of Daudi cells behaves as a dominant trait in Daudi x melanoma hybrids, the expression of B-cell differentiation markers is suppressed. Thus, the gamma/delta T-cell ligand expressed by Daudi cells behaves as a dominant tumor antigen in Daudi x melanoma hybrids and is unrelated to the differentiated B-cell phenotype. Dominant expression of the Daudi ligand for human Vgamma9/Vdelta2 T cells in these hybrids may provide a basis for defining the stimulatory principle at the molecular level.
authors.affiliation: Department of Medicine I, Freiburg University Medical Center, Hugstetter Str. 55, D-79106 Freiburg, Germany.
authors.forename: O
authors.initials: O
authors.lastname: Viale
authors.forename: P
authors.initials: P
authors.lastname: van der Bruggen
authors.forename: E
authors.initials: E
authors.lastname: Meuer
authors.forename: R
authors.initials: R
authors.lastname: Kunzmann
authors.forename: H
authors.initials: H
authors.lastname: Kohler
authors.forename: R
authors.initials: R
authors.lastname: Mertelsmann
authors.forename: T
authors.initials: T
authors.lastname: Boon
authors.forename: P
authors.initials: P
authors.lastname: Fisch
mesh_terms: D002051:Burkitt Lymphoma / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D002999:Clone Cells; D016172:DNA Fingerprinting; D005838:Genotype; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000378:metabolism; D006801:Humans; D006822:Hybrid Cells; D007621:Karyotyping; D008213:Lymphocyte Activation; D008545:Melanoma / Q000276:immunology*; D010641:Phenotype; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000276:immunology; D016176:T-Lymphocyte Subsets / Q000276:immunology*; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D016692:Receptors, Antigen, T-Cell, gamma-delta; D014409:Tumor Necrosis Factor-alpha; D016178:Granulocyte-Macrophage Colony-Stimulating Factor