Regulation of antibody response in different immunoglobulin classes. II. Induction of in vitro IgE antibody response in murine spleen cells and demonstration of a possible involvement of distinct T-helper cells in IgE and IgG antibody responses.
In vitro induction of anti-DNP IgE as well as IgG1, IgG2a antibody responses was shown in murine spleen cell culture. Spleen cells primed three times with 1 mug of DNP-OA or DNP-Asc produced significant amounts of anti-DNP IgE as well as IgG antibodies by the in vitro stimulation with DNP-OA or DNP-Asc, respectively. Collaboration between DNP-primed B cells and carrier-primed T cells was required for the induction of both IgE and IgG antibodies with DNP-coupled T-dependent antigen. Carrier-specific T cells induced with a low dose of Asc (0.01 mug) showed helper function only on IgE antibody response, whereas T cells primed with a higher dose of Asc (10 mug) cooperated only with IgG-B cells. T cells primed with Asc in CFA showed helper function mainly on IgG antibody response but not on IgE antibody response. The result indicated the presence of a distinct population of T helper cells for IgE and IgG antibody responses. T-independent antigen (DNP-Ficoll) induced both anti-DNP IgE and IgG antibody responses in DNP-primed spleen cell population without the requirement of the collaboration of helper T cells.
D000818:Animals; D000941:Antigens; D001200:Ascaris / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D002478:Cells, Cultured; D004136:Dinitrobenzenes / Q000276:immunology; D004306:Dose-Response Relationship, Immunologic; D005260:Female; D005362:Ficoll; D007073:Immunoglobulin E / Q000096:biosynthesis*; D007074:Immunoglobulin G / Q000096:biosynthesis*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D010047:Ovalbumin / Q000276:immunology; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
D000941:Antigens; D004136:Dinitrobenzenes; D007074:Immunoglobulin G; D005362:Ficoll; D007073:Immunoglobulin E; D010047:Ovalbumin