4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is a potent tobacco-specific nitrosamine in animals and has been suggested to play a role in human tobacco-related cancers. Our previous study demonstrated that cytochrome P450 (P450) 1A2 catalyzes the formation of 4-hydroxy-1-(3-pyridyl)-1-butanone (keto alcohol) (an alpha-hydroxylation product) from NNK in human liver microsomes. Phenethyl ...

conclusions in this experimental study, for the first time in iran the expression and purification of this recombinant protein was done successfully. this recombinant protein could be used as a vaccine candidate and diagnostic purpose in subsequent investigations. results the highest expression of the cytochrome p450 cyp141 protein was obtained by the addition of 1 mm of isopropyl β-d-1-thiogal...

The occurrence of cytochrome P450 and P450-mediated pentachlorophenol oxidation in a white rot fungus Phanerochaete chrysosporium was demonstrated in this study. The carbon monoxide difference spectra indicated induction of P450 (103±13 pmol P450 per mg protein in the microsomal fraction) by pentachlorophenol. The pentachlorophenol oxidation by the microsomal P450 was NADPH-dependent at a rate ...

The drug-metabolizing enzymes that contribute to the metabolism or bioactivation of a drug play a crucial role in defining the absorption, distribution, metabolism, and excretion properties of that drug. Although the overall effect of the cytochrome P450 (P450) family of drug-metabolizing enzymes in this capacity cannot be understated, advancements in the field of non-P450-mediated metabolism h...

Herbs, food and dietary supplements (HFDS), can interact significantly with anticancer drug treatments via cytochrome p450 isoforms (CYP) CYP3A4, CYP2D6, CYP1A2, CYP2C8. The objective of this review was to assess the influence HFDS compounds on these cytochromes. Interactions CYP activities were searched for 189 herbs products, 72 in Web Knowledge® databases. Analyses made from 140 3125 clinica...

Previous studies have shown that the presence of one P450 enzyme can affect the function of another. The goal of the present study was to determine if P450 enzymes are capable of forming homomeric complexes that affect P450 function. To address this problem, the catalytic activities of several P450s were examined in reconstituted systems containing NADPH-POR (cytochrome P450 reductase) and a si...

Alternative Names Adrenal Hyperplasia III 21-@Hydroxylase Deficiency CYP21 Deficiency Congenital Adrenal Hyperplasia 1 CAH1 Cytochrome P450, Subfamily XXIA, Polypeptide 2 CYP21A2 Cytochrome P450, Subfamily XXI CYP21 Steroid Cytochrome P450 21-Hydroxylase P450c21 21-@Hydroxylase B, Included CYP21B CA21H Cytochrome P450, Subfamily XXIA, Polypeptide 1 Pseudogene CYP21A1P CYP21P CYP21A Hyperandroge...

Numerous cytochrome P450 inhibitors have been described as effective modulators of cytochrome P450 isoforms activity in vitro. Their inhibitory efficiency may be considerably modified after in vivo application. The aim of this study was to examine the effect of oral administration of diallyl sulfide--a cytochrome P450 2E1 inhibitor and cimetidine--a cytochrome P450 2C6 and 2C11 inhibitor on rat...