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Molecules 2017, 22(10), 1686; doi:10.3390/molecules22101686

Identification of Metabolites of the Cardioprotective Alkaloid Dehydrocorydaline in Rat Plasma and Bile by Liquid Chromatography Coupled with Triple Quadrupole Linear Ion Trap Mass Spectrometry

1
Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China
2
School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550004, China
*
Author to whom correspondence should be addressed.
Received: 15 September 2017 / Revised: 2 October 2017 / Accepted: 3 October 2017 / Published: 10 October 2017
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Abstract

Dehydrocorydaline (DHC), a quaternary alkaloid from Corydalis yanhusuo, has been demonstrated to be the active constituent in the treatment of coronary heart disease. In this study, a high-performance liquid chromatography–electrospray ionization–triple quadrupole linear ion trap mass spectrometry (HPLC–ESI–QTRAP MS) technique was used to identify DHC metabolites in plasma and bile after oral administration of DHC to rats. A total of 18 metabolites (M1 to M18) were identified and characterized by LC–MS/MS in the positive ion mode. These 18 metabolites were all present in rat bile, while only 9 were detected in plasma. O-demethylation, hydroxylation, di-hydroxylation, glucuronidation of O-demethyl DHC, sulfation of O-demethyl DHC and di-hydroxylation of dehydro-DHC were the major metabolic pathways of DHC. This is the first time that these metabolites of DHC have been identified in rat plasma and bile, which provides useful information for further analysis of the biotransformation of DHC and other quaternary protoberberine-type alkaloids. View Full-Text
Keywords: LC–MS/MS; dehydrocorydaline; Corydalis yanhusuo; metabolites; cardioprotection LC–MS/MS; dehydrocorydaline; Corydalis yanhusuo; metabolites; cardioprotection
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Guan, H.; Li, K.; Wang, X.; Luo, X.; Su, M.; Tan, W.; Chang, X.; Shi, Y. Identification of Metabolites of the Cardioprotective Alkaloid Dehydrocorydaline in Rat Plasma and Bile by Liquid Chromatography Coupled with Triple Quadrupole Linear Ion Trap Mass Spectrometry. Molecules 2017, 22, 1686.

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