title: Effect of promethazine and isosafrole on rat-hepatic microsomal mono-oxygenase activity: comparison with classic inducers phenobarbitone and beta-naphthoflavone.
abstract: The characteristics of induction of rat-hepatic microsomal mono-oxygenase activity by promethazine and isosafrole have been investigated and compared with the classic inducers phenobarbitone and beta-naphthoflavone. Both promethazine and isosafrole pretreatments result in increased cytochromes P-450, and enhanced NADPH-cytochrome c reductase, aminopyrine N-demethylase, dichloronitroanisole O-demethylase, ethoxycoumarin O-deethylase and ethoxyresorufin O-deethylase activity. Isosafrole but not promethazine increased the liver to body weight ratio. It is concluded that promethazine and isosafrole pretreatment produces an induction of the rat-hepatic microsomal mono-oxygenase system which shows both phenobarbitone- and polycyclic aromatic hydrocarbon-type characteristics.
mesh_terms: D000818:Animals; D001571:Benzoflavones / Q000494:pharmacology*; D001835:Body Weight / Q000187:drug effects; D004149:Dioxoles / Q000494:pharmacology*; D004790:Enzyme Induction; D005419:Flavonoids / Q000494:pharmacology*; D008297:Male; D008862:Microsomes, Liver / Q000201:enzymology*; D009929:Organ Size / Q000187:drug effects; D010105:Oxygenases / Q000096:biosynthesis*; D010634:Phenobarbital / Q000494:pharmacology*; D011398:Promethazine / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D012451:Safrole / Q000494:pharmacology*; D019324:beta-Naphthoflavone
chemical_list: D001571:Benzoflavones; D004149:Dioxoles; D005419:Flavonoids; D019324:beta-Naphthoflavone; D010105:Oxygenases; D011398:Promethazine; D012451:Safrole; C015959:isosafrole; D010634:Phenobarbital