title: Direct inhibition of murine B lymphocyte differentiation by 12-O-tetradecanoylphorbol-13-acetate.
abstract: The tumor-promoting agent, 12-O-tetradecanoylphorbol-13-acetate (TPA) inhibits the humoral immune response of lymphocytes to antigen. To test the hypothesis that this inhibition is due to a direct effect upon B lymphocytes, splenic lymphocytes or murine B lymphocytes, enriched by 'panning' splenic lymphocytes onto anti-IgM-coated petri dishes, were immunized in vitro with the thymus/accessory cell-independent antigen trinitrophenyl lipopolysaccharide (TNP-LPS) with or without TPA. The number of anti-TNP antibody-forming cells present in both lymphocyte populations after 5 days was almost completely inhibited to the same degree by TPA. These data unambiguously show that TPA can directly inhibit the differentiation of B lymphocytes to antibody-forming cells.
mesh_terms: D000818:Animals; D000917:Antibody Formation / Q000187:drug effects; D001402:B-Lymphocytes / Q000166:cytology / Q000187:drug effects*; D002454:Cell Differentiation / Q000187:drug effects; D002478:Cells, Cultured; D005260:Female; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*
chemical_list: D013755:Tetradecanoylphorbol Acetate