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Glucuronidation of bavachinin by human tissues and expressed UGT enzymes: Identification of UGT1A1 and UGT1A8 as the major contributing enzymes
Lv, Xia1,2; Hou, Jie3; Xia, Yang-Liu2; Ning, Jing2,3; He, Gui-Yuan2; Wang, Ping2; Ge, Guang-Bo2; Xiu, Zhi-Long1; Yang, Ling2
关键词Bavachinin Udp-glucuronosyltransferases Ugt1a1 Ugt1a8 Glucuronidation Human Tissues
刊名DRUG METABOLISM AND PHARMACOKINETICS
2015-10-01
DOI10.1016/j.dmpk.2015.07.001
30期:5页:358-365
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Life Sciences & Biomedicine
类目[WOS]Pharmacology & Pharmacy
研究领域[WOS]Pharmacology & Pharmacy
关键词[WOS]UDP-GLUCURONOSYLTRANSFERASE ISOFORMS ; HUMAN LIVER ; PSORALEA-CORYLIFOLIA ; IN-VITRO ; LIQUID-CHROMATOGRAPHY ; ACID ; INTESTINE ; MAGNOLOL ; POTENT ; SEEDS
英文摘要Bavachinin (BCI), a major bioactive compound in Chinese herbal Psoralea corylifolia, possesses a wide range of biological activities. In this study, the glucuronidation pathway of BCI was characterized for the first time, by using pooled human liver microsomes (HLM), pooled human intestine microsomes (HIM) and recombinant human UDP-glucosyltransferases (UGTs). One mono-glucuronide was detected in HLM in the presence of uridine-diphosphate glucuronic acid (UDPGA), and it was biosynthesized and well-characterized as BCI-4'-O-glucuronide (BCIG). Reaction phenotyping assay showed that UGT1A1, UGT1A3 and UGT1A8 were involved in BCI-4'-O-glucuronidation, while UGT1A1 and UGT1A8 displayed the higher catalytic ability among all tested UGT isoforms. Kinetic analysis demonstrated that BCI-4'-O-glucuronidation in both HLM and UGT1A1 followed sigmoidal kinetic behaviors and displayed much close Km values (12.4 mu M in HLM & 9.7 mu M in UGT1A1). Both chemical inhibition assays and correlation analysis demonstrated that UGT1A1 displayed a predominant role in BCI-4'-O-glucuronidation in HLM. Both HIM and UGT1A8 exhibited substrate inhibition at high concentrations, and Km values of HIM and UGT1A8 were 3.6 and 2.3 mM, respectively. Similar catalytic efficiencies were observed for HIM (199.3 mu L/min/mg) and UGT1A8 (216.2 mL/min/mg). These findings suggested that UGT1A1 and UGT1A8 were the primary isoforms involved in BCI-4'-O-glucuronidation in HLM, and HIM, respectively. Copyright (C) 2015, The Japanese Society for the Study of Xenobiotics. Published by Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000362974900006
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146597
专题中国科学院大连化学物理研究所
作者单位1.Dalian Univ Technol, Dept Biosci & Biotechnol, Dalian, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Pharmaceut Resource Discovery, Dalian, Peoples R China
3.Dalian Med Univ, Dalian, Peoples R China
推荐引用方式
GB/T 7714
Lv, Xia,Hou, Jie,Xia, Yang-Liu,et al. Glucuronidation of bavachinin by human tissues and expressed UGT enzymes: Identification of UGT1A1 and UGT1A8 as the major contributing enzymes[J]. DRUG METABOLISM AND PHARMACOKINETICS,2015,30(5):358-365.
APA Lv, Xia.,Hou, Jie.,Xia, Yang-Liu.,Ning, Jing.,He, Gui-Yuan.,...&Yang, Ling.(2015).Glucuronidation of bavachinin by human tissues and expressed UGT enzymes: Identification of UGT1A1 and UGT1A8 as the major contributing enzymes.DRUG METABOLISM AND PHARMACOKINETICS,30(5),358-365.
MLA Lv, Xia,et al."Glucuronidation of bavachinin by human tissues and expressed UGT enzymes: Identification of UGT1A1 and UGT1A8 as the major contributing enzymes".DRUG METABOLISM AND PHARMACOKINETICS 30.5(2015):358-365.
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