title: Antagonistic effects of phorbol esters on lymphocyte activation. Evidence that protein kinase C provides an early signal associated with lytic function.
abstract: There is increasing evidence that protein kinase C plays a role in the transduction of an activation signal in lymphocytes. The bulk of this evidence is based on pharmacological experiments involving the tumor promoter phorbol myristate acetate (PMA) as a protein kinase C agonist. However, in cytotoxic T lymphocytes, PMA has been shown to both stimulate and inhibit lytic function. By examining the effects of a series of phorbol esters on protein kinase C activity in lymphocytes, we will demonstrate that these antagonistic effects of PMA on cytotoxic T lymphocyte function are related to multiple effects of PMA on protein kinase C activity.
mesh_terms: D000818:Animals; D002460:Cell Line; D007700:Kinetics; D008213:Lymphocyte Activation / Q000187:drug effects*; D051379:Mice; D015240:Phorbol 12,13-Dibutyrate; D010703:Phorbol Esters / Q000494:pharmacology*; D011493:Protein Kinase C / Q000378:metabolism*; D013602:T-Lymphocytes, Cytotoxic / Q000187:drug effects; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D010703:Phorbol Esters; C008876:phorbol-12,13-didecanoate; D015240:Phorbol 12,13-Dibutyrate; D011493:Protein Kinase C; D013755:Tetradecanoylphorbol Acetate