title: Regulation of antibody secretion by hybridoma cells. I. Suppression of antibody secretion by coculture of hybridoma cells with idiotype-induced suppressor cells.
abstract: In this study, we have demonstrated that antibody secretion by hybridoma cell lines can be down-regulated by idiotype-specific immune spleen cells or by nylon wool nonadherent spleen cells. This suppression of antibody secretion can be abolished by treating the idiotype-specific immune spleen cells with anti-Thy 1.2 plus complement. The hybridoma we used for most of our experiments secretes IgM specific for the cross-reacting haptens 2,4,6-trinitrophenyl (TNP) and 2,4-dinitrophenyl (DNP). Suppression was achieved by direct coculture of hybridoma cells with immune cells from animals which were injected with affinity-purified hybridoma antibody-coupled syngeneic spleen cells. The suppressed and control cultures contained similar numbers of viable hybridoma cells, suggesting that a simple cytotoxic effect is not responsible. Idiotype specificity was established in experiments showing that two idiotype immune animals immunized with antibody from two different IgM anti-TNP hybridomas could suppress the hybridoma to which they were immunized but could not affect the other hybridoma. Immune spleen cells required 3-4 days of coculture with hybridoma cells before maximum suppression was achieved. The kinetics of the response suggest that the final effector suppressor cell is generated during the coculture period and that a second signal, perhaps a product of the hybridoma cells, may be required.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000378:metabolism*; D000954:Antigens, Surface / Q000276:immunology; D002478:Cells, Cultured; D006825:Hybridomas / Q000276:immunology*; D007108:Immune Tolerance; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D051379:Mice; D013154:Spleen / Q000166:cytology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D018800:Thy-1 Antigens; D013997:Time Factors; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D000906:Antibodies; D000954:Antigens, Surface; D007130:Immunoglobulin Idiotypes; D018800:Thy-1 Antigens; D014301:Trinitrobenzenes