title: [Cytochrome P-450 catalyzed oxidation of 1-piperidinoanthraquinone].
abstract: Oxidation of 1-piperidinoantraquinone (1-PA) in microsomal fractions of rat liver was studied. The only product of complete oxidation of 1-PA--(N-antraquinone-1)-delta-aminovaleric acid-was identified using paper and thin-layer chromatography. The participation of cytochrome P-450 in oxidation of 1-PA was demonstrated by sharp inhibition, involving blowing of the microsomes with CO and treatment with sodium deoxycholate. Studies of differential spectra of cytochrome P-450 in the presence of 1-PA are indicative of the first type of binding between 1-PA and cytochrome P-450. The binding constants (Ks) and the kinetic parameters (Km and V) for the above substrate in control microsomes and in those induced by phenobarbital and 3-methyl cholanthrene were determined. The results obtained suggest that cytochrome P-450 is involved in oxidation of a number of heterocyclic compounds resulting in the opening of the ring.
mesh_terms: D000818:Animals; D000880:Anthraquinones / Q000378:metabolism*; D002248:Carbon Monoxide; D002384:Catalysis; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D003840:Deoxycholic Acid / Q000494:pharmacology; D066298:In Vitro Techniques; D008748:Methylcholanthrene / Q000494:pharmacology; D008862:Microsomes, Liver / Q000378:metabolism*; D009243:NAD / Q000494:pharmacology; D009249:NADP / Q000494:pharmacology; D010084:Oxidation-Reduction; D010634:Phenobarbital / Q000494:pharmacology; D010880:Piperidines; D051381:Rats; D013057:Spectrum Analysis
chemical_list: D000880:Anthraquinones; D010880:Piperidines; D003840:Deoxycholic Acid; D009243:NAD; C019528:1-piperidinoanthraquinone; D009249:NADP; D008748:Methylcholanthrene; D002248:Carbon Monoxide; D003577:Cytochrome P-450 Enzyme System; D010634:Phenobarbital
vernacular_title: Kataliziruemoe tsitokhromom P-450 okislenie 1-piperidinantrakhinona.