title: Effects of 12-o-tetradecanoylphorbol-13-acetate and polyprenoic acid derivative on calcium-activated phospholipid-dependent protein kinase of pig skin.
abstract: 12-o-Tetradecanoylphorbol-13-acetate (TPA) activates calcium-activated, phospholipid-dependent protein kinase (protein kinase C) partially purified in an ion exchange column from pig epidermis. Protein kinase C was activated by TPA in a concentration-dependent manner with simultaneous addition of Ca2+ and phospholipid. Polyprenoic acid derivative (E5166) which is a newly synthesized retinoic acid derivative, inhibited the TPA activation of protein kinase C. This inhibition may explain the mechanisms by which retinoids inhibit TPA-induced tumor promotion.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D010718:Phosphatidylserines / Q000494:pharmacology; D011493:Protein Kinase C / Q000378:metabolism*; D012867:Skin / Q000187:drug effects* / Q000201:enzymology; D013552:Swine; D013755:Tetradecanoylphorbol Acetate / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D014212:Tretinoin / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D010718:Phosphatidylserines; D014212:Tretinoin; C034534:3,7,11,15-tetramethyl-2,4,6,10,14-hexadecapentaenoic acid; D011493:Protein Kinase C; D013755:Tetradecanoylphorbol Acetate; D002118:Calcium