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Journal of Chinese Pharmaceutical Sciences ›› 2023, Vol. 32 ›› Issue (1): 1-16.DOI: 10.5246/jcps.2023.01.001

• Original articles •     Next Articles

Epigenetic variants of xenobiotic metabolism affect individual differences in antiepileptic drug 3,4-DCPB pharmacokinetic phenotype

Yingyuan Lu1,3, Mei Zhang2, Shengju Yin1, Xiaona Dong1, Zhiyuan Zhang1, Haixu Cheng1, Pengfei Tu3, Guifang Dou4, Yongsheng Che5, Zhenghui Xu6, Feng Xu7, Xian Wang7, Chuang Lu8, Yaqing Lou1, Guoliang Zhang1,*()   

  1. 1 Department of Pharmacology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
    2 Department of Pharmacy, Beijing Military Region General Hospital, Beijing 100700, China
    3 State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
    4 Laboratory of Pharmacokinetics, Beijing Institute of Radiation Medicine, Beijing 100850, China
    5 Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences, Beijing 100050, China
    6 CapitalBio Corporation, Beijing 102206, China
    7 Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
    8 Department of Drug Metabolism & Pharmacokinetics (DMPK), Accent Therapeutics Incorporated, Massachusetts (MA), 024251, USA
  • Received:2022-10-16 Revised:2022-11-12 Accepted:2022-11-26 Online:2023-01-31 Published:2023-01-31
  • Contact: Guoliang Zhang

Abstract:

Antiepileptic drug therapy is a main method for controlling epilepsy, but the responses of patients to the current treatments are not consistent due to inter-individual differences in drug disposition. In the present study, we investigated whether genetic and epigenetic variants affected the pharmacokinetic phenotypes of the antiepileptic drug 3,4-dichlorophenyl-propenoyl-sec-butylamine (3,4-DCPB) in phase I dose-escalation clinical trial in healthy subjects. The plasma concentrations of 3,4-DCPB and its major metabolite M1 were determinated by the liquid chromatography tandem mass spectrometry (LC-MS/MS) method. Single nucleotide polymorphisms (SNPs) of xenobiotic metabolisms including cytochrome P450 2D6 (CYP2D6), CYP2C9, CYP1A2, CYP2C19, CYP3A5, transporter ABCB1 (C1236T), nuclear receptors AhR, CAR and PXR were analyzed by genotyping and DNA methylation levels for these genes. Compared to the wild-type CYP2D6*1/*1 homozygote (extensive metabolizers, EMs), the variant allelic CYP2D6*10 carriers (intermediate metabolizers, IMs) showed that the area under the curve (AUC0–t) ratios of metabolite M1/3,4-DCPB parent drug were lower, and the plasma half-life (t1/2) ratios were prolonger, while the DNA methylation levels were higher. These data suggested that epimutation induced by lose (CYP2D6*10, C > T) of cytosine, might explain the associations among genotype, epigenotype and individual differences in the pharmacokinetic phenotype of 3,4-DCPB, and provide new insight in personalized treatment of epilepsy.

Key words: Pharmacokinetics, Antiepileptic drug 3,4-DCPB, Individual difference, DNA methylation, CYP2D6*10 carriers, Epimutation, Phase I dose-escalation clinical trial

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