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Špičáková A, Szotáková B, Dimunová D, Myslivečková Z, Kubíček V, Ambrož M, Lněničková K, Krasulová K, Anzenbacher P, Skálová L. Nerolidol and Farnesol Inhibit Some Cytochrome P450 Activities but Did Not Affect Other Xenobiotic-Metabolizing Enzymes in Rat and Human Hepatic Subcellular Fractions. Molecules 2017; 22:molecules22040509. [PMID: 28338641 PMCID: PMC6154719 DOI: 10.3390/molecules22040509] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/15/2017] [Accepted: 03/20/2017] [Indexed: 12/11/2022] Open
Abstract
Sesquiterpenes, 15-carbon compounds formed from three isoprenoid units, are the main components of plant essential oils. Sesquiterpenes occur in human food, but they are principally taken as components of many folk medicines and dietary supplements. The aim of our study was to test and compare the potential inhibitory effect of acyclic sesquiterpenes, trans-nerolidol, cis-nerolidol and farnesol, on the activities of the main xenobiotic-metabolizing enzymes in rat and human liver in vitro. Rat and human subcellular fractions, relatively specific substrates, corresponding coenzymes and HPLC, spectrophotometric or spectrofluorometric analysis of product formation were used. The results showed significant inhibition of cytochromes P450 (namely CYP1A, CYP2B and CYP3A subfamilies) activities by all tested sesquiterpenes in rat as well as in human hepatic microsomes. On the other hand, all tested sesquiterpenes did not significantly affect the activities of carbonyl-reducing enzymes and conjugation enzymes. The results indicate that acyclic sesquiterpenes might affect CYP1A, CYP2B and CYP3A mediated metabolism of concurrently administered drugs and other xenobiotics. The possible drug-sesquiterpene interactions should be verified in in vivo experiments.
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Affiliation(s)
- Alena Špičáková
- Department of Pharmacology and Institute of Molecular and Translational Medicine, Faculty of Medicine, Palacky University, Hněvotínská 3, 77515 Olomouc, Czech Republic.
| | - Barbora Szotáková
- Department of Biochemical Sciences, Faculty of Pharmacy, Charles University, Akademika Heyrovského 1203, 50005 Hradec Králové, Czech Republic.
| | - Diana Dimunová
- Department of Biochemical Sciences, Faculty of Pharmacy, Charles University, Akademika Heyrovského 1203, 50005 Hradec Králové, Czech Republic.
| | - Zuzana Myslivečková
- Department of Biochemical Sciences, Faculty of Pharmacy, Charles University, Akademika Heyrovského 1203, 50005 Hradec Králové, Czech Republic.
| | - Vladimír Kubíček
- Department of Biophysics and Physical Chemistry, Faculty of Pharmacy, Charles University, Akademika Heyrovského 1203, 50005 Hradec Králové, Czech Republic.
| | - Martin Ambrož
- Department of Biochemical Sciences, Faculty of Pharmacy, Charles University, Akademika Heyrovského 1203, 50005 Hradec Králové, Czech Republic.
| | - Kateřina Lněničková
- Department of Biochemical Sciences, Faculty of Pharmacy, Charles University, Akademika Heyrovského 1203, 50005 Hradec Králové, Czech Republic.
| | - Kristýna Krasulová
- Department of Pharmacology and Institute of Molecular and Translational Medicine, Faculty of Medicine, Palacky University, Hněvotínská 3, 77515 Olomouc, Czech Republic.
| | - Pavel Anzenbacher
- Department of Pharmacology and Institute of Molecular and Translational Medicine, Faculty of Medicine, Palacky University, Hněvotínská 3, 77515 Olomouc, Czech Republic.
| | - Lenka Skálová
- Department of Biochemical Sciences, Faculty of Pharmacy, Charles University, Akademika Heyrovského 1203, 50005 Hradec Králové, Czech Republic.
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Jurva U, Wikström HV, Weidolf L, Bruins AP. Comparison between electrochemistry/mass spectrometry and cytochrome P450 catalyzed oxidation reactions. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2003; 17:800-810. [PMID: 12672134 DOI: 10.1002/rcm.978] [Citation(s) in RCA: 158] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The extent to which electrochemistry on-line with electrospray mass spectrometry can be used to mimic cytochrome P450 catalyzed oxidations has been investigated. Comparisons on the mechanistic level have been made for most reactions in an effort to explain why certain reactions can, and some cannot, be mimicked by electrochemical oxidations. The EC/MS/MS system used successfully mimics in cases where the P450 catalyzed reactions are supposed to proceed via a mechanism initiated by a one-electron oxidation, such as N-dealkylation, S-oxidation, P-oxidation, alcohol oxidation and dehydrogenation. The P450 catalyzed reactions initiated via direct hydrogen atom abstraction, such as O-dealkylation and hydroxylation of unsubstituted aromatic rings, generally had a too high oxidation potential to be electrochemically oxidized below the oxidation potential limit of water, and were not mimicked by the EC/MS/MS system. Even though the EC/MS/MS system is not able to mimic all oxidations performed by cytochrome P450, valuable information can be obtained concerning the sensitivity of the substrate towards oxidation and in which position of the molecule oxidations are likely to take place. For small-scale electrochemical synthesis of metabolites, starting from the drug, the EC/MS/MS system should be very useful for quick optimization of the electrochemical conditions. The simplicity of the system, and the ease and speed with which it can be applied to a large number of compounds, make it a useful tool in drug metabolism research.
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Affiliation(s)
- Ulrik Jurva
- Centre for Pharmacy, University of Groningen, The Netherlands
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