DICP OpenIR
Subject Area物理化学
Characterization of Hepatic and Intestinal Glucuronidation of Magnolol: Application of the Relative Activity Factor Approach to Decipher the Contributions of Multiple UDP-Glucuronosyltransferase Isoforms
Zhu, Liangliang1,2; Ge, Guangbo1; Zhang, Hongbo3; Liu, Huixin1; He, Guiyuan1,2; Liang, Sicheng1; Zhang, Yanyan1; Fang, Zhongze1; Dong, Peipei1; Finel, Moshe3; Yang, Ling1; Yang L(杨凌)
Source PublicationDRUG METABOLISM AND DISPOSITION
2012-03-01
DOI10.1124/dmd.111.042192
Volume40Issue:3Pages:529-538
Indexed BySCI
SubtypeArticle
Department18
Funding Project1806
Contribution Rank1,1
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS SubjectPharmacology & Pharmacy
WOS Research AreaPharmacology & Pharmacy
WOS KeywordHUMAN LIVER-MICROSOMES ; DRUG-GLUCURONIDATION ; SUBSTRATE ; EXPRESSION ; CYTOCHROME-P450 ; SPECIFICITY ; SELECTIVITY ; METABOLISM ; DOPAMINE ; KINETICS
AbstractMagnolol is a food additive that is often found in mints and gums. Human exposure to this compound can reach a high dose; thus, characterization of magnolol disposition in humans is very important. Previous studies indicated that magnolol can undergo extensive glucuronidation in humans in vivo. In this study, in vitro assays were used to characterize the glucuronidation pathway in human liver and intestine. Assays with recombinant human UDP-glucuronosyltransferase enzymes (UGTs) revealed that multiple UGT isoforms were involved in magnolol glucuronidation, including UGT1A1, -1A3, -1A7, -1A8, -1A9, -1A10, and -2B7. Magnolol glucuronidation by human liver microsomes (HLM), human intestine microsomes (HIM), and most recombinant UGTs exhibited strong substrate inhibition kinetics. The degree of substrate inhibition was relatively low in the case of UGT1A10, whereas the reaction catalyzed by UGT1A9 followed biphasic kinetics. Chemical inhibition studies and the relative activity factor (RAF) approach were used to identify the individual UGTs that played important roles in magnolol glucuronidation in HLM and HIM. The results indicate that UGT2B7 is mainly responsible for the reaction in HLM, whereas UGT2B7 and UGT1A10 are significant contributors in HIM. In summary, the current study clarifies the glucuronidation pathway of magnolol and demonstrates that the RAF approach can be used as an efficient method for deciphering the roles of individual UGTs in a given glucuronidation pathway in the native tissue that is catalyzed by multiple isoforms with variable and atypical kinetics.
Language英语
WOS IDWOS:000300610100017
Citation statistics
Cited Times:49[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/118375
Collection中国科学院大连化学物理研究所
Corresponding AuthorYang L(杨凌)
Affiliation1.Chinese Acad Sci, Lab Pharmaceut Resource Discovery, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
3.Univ Helsinki, Ctr Drug Res, Fac Pharm, Helsinki, Finland
Recommended Citation
GB/T 7714
Zhu, Liangliang,Ge, Guangbo,Zhang, Hongbo,et al. Characterization of Hepatic and Intestinal Glucuronidation of Magnolol: Application of the Relative Activity Factor Approach to Decipher the Contributions of Multiple UDP-Glucuronosyltransferase Isoforms[J]. DRUG METABOLISM AND DISPOSITION,2012,40(3):529-538.
APA Zhu, Liangliang.,Ge, Guangbo.,Zhang, Hongbo.,Liu, Huixin.,He, Guiyuan.,...&杨凌.(2012).Characterization of Hepatic and Intestinal Glucuronidation of Magnolol: Application of the Relative Activity Factor Approach to Decipher the Contributions of Multiple UDP-Glucuronosyltransferase Isoforms.DRUG METABOLISM AND DISPOSITION,40(3),529-538.
MLA Zhu, Liangliang,et al."Characterization of Hepatic and Intestinal Glucuronidation of Magnolol: Application of the Relative Activity Factor Approach to Decipher the Contributions of Multiple UDP-Glucuronosyltransferase Isoforms".DRUG METABOLISM AND DISPOSITION 40.3(2012):529-538.
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