title: Interferon-gamma and B cell stimulatory factor-1 reciprocally regulate Ig isotype production.
abstract: Gamma interferon (IFN-gamma) and B cell stimulatory factor-1 (BSF-1), also known as interleukin-4, are T cell-derived lymphokines that have potent effects on B cell proliferation and differentiation. They are often secreted by distinct T cell clones. It is now shown that IFN-gamma stimulates the expression of immunoglobulin (Ig) of the IgG2a isotype and inhibits the production of IgG3, IgG1, IgG2b, and IgE. By contrast, BSF-1 has powerful effects in promoting switching to the expression of IgG1 and IgE but markedly inhibits IgM, IgG3, IgG2a, and IgG2b. These results indicate that BSF-1 and IFN-gamma as well as the T cells that produce them may act as reciprocal regulatory agents in the determination of Ig isotype responses. The effects of IFN-gamma and BSF-1 on isotype expression are independent.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D001402:B-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D006224:Cricetinae; D006133:Growth Substances / Q000494:pharmacology*; D007132:Immunoglobulin Isotypes / Q000096:biosynthesis*; D007371:Interferon-gamma / Q000276:immunology / Q000494:pharmacology*; D015847:Interleukin-4; D007700:Kinetics; D008213:Lymphocyte Activation; D008222:Lymphokines / Q000494:pharmacology*; D051379:Mice; D008811:Mice, Inbred DBA; D011994:Recombinant Proteins / Q000494:pharmacology*
chemical_list: D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D006133:Growth Substances; D007132:Immunoglobulin Isotypes; D008222:Lymphokines; D011994:Recombinant Proteins; D015847:Interleukin-4; D007371:Interferon-gamma