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In Vitro Glucuronidation of Ochratoxin A by Rat Liver Microsomes

文献类型: 外文期刊

作者: Han, Zheng 1 ; Tangni, Emmanuel K. 2 ; Di Mavungu, Jose Diana 3 ; Vanhaecke, Lynn 4 ; De Saeger, Sarah 3 ; Wu, Aibo 1 ;

作者机构: 1.Shanghai Acad Agr Sci, Inst Agrifood Stand & Testing Technol, Shanghai 201403, Peoples R China

2.Vet & Agrochem Res Ctr CODA CERVA, Unit Toxins & Nat Components, B-3080 Tervuren, Belgium

3.Univ Ghent, Fac Pharmaceut Sci, Lab Food Anal, B-9000 Ghent, Belgium

4.Univ Ghent, Fac Vet Med, Chem Anal Lab, B-9820 Merelbeke, Belgium

关键词: ochratoxin A;glucuronidation;metabolic pathway;rat liver microsomes;Orbitrap

期刊名称:TOXINS ( 影响因子:4.546; 五年影响因子:4.8 )

ISSN: 2072-6651

年卷期: 2013 年 5 卷 12 期

页码:

收录情况: SCI

摘要: Ochratoxin A (OTA), one of the most toxic mycotoxins, can contaminate a wide range of food and feedstuff. To date, the data on its conjugates via glucuronidation request clarification and consolidation. In the present study, the combined approaches of ultra high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS), UHPLC-Orbitrap-high resolution mass spectrometry (HRMS) and liquid chromatography-multiple stage mass spectrometry (LC-MSn) were utilized to investigate the metabolic profile of OTA in rat liver microsomes. Three conjugated products of OTA corresponding to amino-, phenol- and acyl-glucuronides were identified, and the related structures were confirmed by hydrolysis with -glucuronidase. Moreover, OTA methyl ester, OT and OT-glucuronide were also found in the reaction solution. Based on these results, an in vitro metabolic pathway of OTA has been proposed for the first time.

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