title: T-cell hybridoma bearing heavy chain variable region determinants producing (T,G)-A--L-specific helper factor.
abstract: Thymus-derived lymphocytes (T cells) exert their regulatory effect (help or suppression) on the antibody production by B cells either by direct cell to cell interaction or by soluble mediators or factors. The low frequency of specific T cells, the heterogeneity of their responses and their relatively short life span have hampered the molecular characterization of the antigen recognition unit of T cells, and its structure is largely unknown. The lymphocyte hybridization technique, which has been found very useful for the production of B-cell hybridomas secreting specific monoclonal antibodies, has also been used for the generation of homogeneous and stable T-cell hybridomas with unlimited growth potential. So far the only specific effector function demonstrated in the established T hybridomas is the property to generate a factor(s) which suppresses antibody responses. We now describe the establishment of hybrid lines which exhibit characteristic T-cell markers. One of the hybridomas (denoted R-9) releases into the culture supernatant factor(s) with helper activity specific to the synthetic polypeptide (T,G)-A--L and bears surface determinants of the immunoglobulin heavy chain variable region (VH). Such hybrid cell lines are of great value for studies on the nature of the T-cell receptor.
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000032:analysis*; D001666:Binding Sites, Antibody / Q000276:immunology*; D000939:Epitopes; D007143:Immunoglobulin Heavy Chains / Q000276:immunology*; D007135:Immunoglobulin Variable Region / Q000276:immunology*; D007621:Karyotyping; D008211:Lymphocyte Cooperation; D008285:Major Histocompatibility Complex; D051379:Mice; D010455:Peptides / Q000276:immunology; D011948:Receptors, Antigen, T-Cell / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000954:Antigens, Surface; D000939:Epitopes; D007143:Immunoglobulin Heavy Chains; D007135:Immunoglobulin Variable Region; D010455:Peptides; D011948:Receptors, Antigen, T-Cell