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Pharmaceutics 2018, 10(3), 141;

Characterization of CYPs and UGTs Involved in Human Liver Microsomal Metabolism of Osthenol

BK21 Plus KNU Multi-Omics-based Creative Drug Research Team, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu 41566, Korea
College of Pharmacy, Yeungnam University, Gyeongsan 38541, Korea
Authors to whom correspondence should be addressed.
Received: 11 July 2018 / Revised: 27 August 2018 / Accepted: 27 August 2018 / Published: 30 August 2018
(This article belongs to the Special Issue Drug Metabolism, Pharmacokinetics and Bioanalysis)
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Osthenol is a prenylated coumarin isolated from the root of Angelica koreana and Angelica dahurica, and is an O-demethylated metabolite of osthole in vivo. Its various pharmacological effects have been reported previously. The metabolic pathway of osthenol was partially confirmed in rat osthole studies, and 11 metabolic products were identified in rat urine. However, the metabolic pathway of osthenol in human liver microsomes (HLM) has not been reported. In this study, we elucidated the structure of generated metabolites using a high-resolution quadrupole-orbitrap mass spectrometer (HR-MS/MS) and characterized the major human cytochrome P450 (CYP) and uridine 5′-diphospho-glucuronosyltransferase (UGT) isozymes involved in osthenol metabolism in human liver microsomes (HLMs). We identified seven metabolites (M1-M7) in HLMs after incubation in the presence of nicotinamide adenine dinucleotide phosphate (NADPH) and uridine 5′-diphosphoglucuronic acid (UDPGA). As a result, we demonstrated that osthenol is metabolized to five mono-hydroxyl metabolites (M1-M5) by CYP2D6, 1A2, and 3A4, respectively, a 7-O-glucuronide conjugate (M6) by UGT1A9, and a hydroxyl-glucuronide (M7) from M5 by UGT1A3 in HLMs. We also found that glucuronidation is the dominant metabolic pathway of osthenol in HLMs. View Full-Text
Keywords: Osthenol; CYP; UGT; human liver microsomes; glucuronidation Osthenol; CYP; UGT; human liver microsomes; glucuronidation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Cho, P.J.; Paudel, S.; Lee, D.; Jin, Y.J.; Jo, G.; Jeong, T.C.; Lee, S.; Lee, T. Characterization of CYPs and UGTs Involved in Human Liver Microsomal Metabolism of Osthenol. Pharmaceutics 2018, 10, 141.

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