title: Elevation of cyclic 3'5' adenosine monophosphate levels by cholera toxin inhibits the generation of interleukin 2 activity.
abstract: Several molecules can interact with membrane receptors on mononuclear cells to increase intracellular levels of cyclic adenosine monophosphate (cAMP). We used the cholera toxin (CT), a cAMP elevating agent, to study the influence of this nucleotide on the production of interleukin 2 (IL-2) by human peripheral blood mononuclear cells stimulated by phytohemagglutinin and phorbol myristate acetate. Stimulated generation of IL-2 activity was inhibited by CT but not by its B subunit. The inhibition was potentiated by addition of theophylline. Therefore the synthesis and/or release of IL-2 is controlled by intracellular cAMP levels and may be modulated by agents active on this nucleotide system, such as bacterial toxins, glycoprotein hormones, or neurotransmitters.
mesh_terms: D000328:Adult; D002460:Cell Line; D002772:Cholera Toxin / Q000494:pharmacology*; D000242:Cyclic AMP / Q000032:analysis*; D006801:Humans; D007376:Interleukin-2 / Q000096:biosynthesis*; D007700:Kinetics; D008213:Lymphocyte Activation / Q000187:drug effects; D008214:Lymphocytes / Q000378:metabolism; D013806:Theophylline / Q000494:pharmacology
chemical_list: D007376:Interleukin-2; D002772:Cholera Toxin; D013806:Theophylline; D000242:Cyclic AMP