title: Phorbol diester synergistically stimulates agonist-induced lipoxygenase product formation in murine macrophages.
abstract: Murine peritoneal macrophages were preincubated with 12-O-tetradecanoylphorbol-13-acetate (100 ng/ml) and then exposed to various concentrations of calcium ionophore A23187. This combined treatment resulted in an elevated release of arachidonic acid metabolites that was synergistic in nature. Resolution of the [3H]products released into the medium revealed that the effect on the cyclooxygenase products 6-keto PGF1 and PGE2 were additive to less than additive (A23187 concentration dependent), the production of lipoxygenase products was synergistically enhanced, and the largest effect was on 12-HETE production.
mesh_terms: D000818:Animals; D001091:Arachidonate Lipoxygenases / Q000378:metabolism*; D000001:Calcimycin / Q000494:pharmacology*; D004357:Drug Synergism; D004789:Enzyme Activation / Q000187:drug effects; D005260:Female; D066298:In Vitro Techniques; D008264:Macrophages / Q000378:metabolism*; D051379:Mice; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*
chemical_list: D000001:Calcimycin; D001091:Arachidonate Lipoxygenases; D013755:Tetradecanoylphorbol Acetate