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• W3195649257 abstract "Marrubiin, a furanoid compound, is a well-known diterpenoid lactone isolated from Marrubium vulgare, which displays a wide spectrum of pharmacological effects and potential hepatotoxicity. Considering that marrubiin contains a structural alert, furan ring, metabolic activation may be one of the major metabolic pathways, and the reactive metabolite may be involved in the hepatotoxicity. The present study was carried out to investigate the bioactivation mechanism of marrubiin in rats and humans. Marrubiin was initially metabolized into cis-butene-1,4-dial intermediate, which was readily trapped by glutathione (GSH) and N-acetyl-lysine (NAL) in the microsomal incubations supplemented with NADPH. A total of nine conjugates were detected and identified by high-resolution mass spectrometry and nuclear magnetic resonance (NMR) spectroscopy. M1-M3 and M6 and M7 were characterized as mono-GSH conjugates, and M4 and M5 were identified as bis-GSH conjugates. M8 and M9 were identified as NAL conjugates. In rat bile, five GSH conjugates (M1-M3; M6 and M7) were detected. M1, M8, and M9 were chemically synthesized, and their structures were characterized by 13C NMR. Sulfaphenazole, ticlopidine, and ketoconazole displayed significant inhibitory effect on the bioactivation of marrubiin. Further phenotyping revealed that CYP2C9, CYP2C19, and CYP3A4 were the primary enzymes catalyzing the bioactivation of marrubiin. The current study provides evidence for the CYP-dominated bioactivation of marrubiin to the corresponding cis-butene-1,4-dial intermediate, which enables us to better understand the potential side effects caused by marrubiin." @default.
• W3195649257 created "2021-08-30" @default.
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• W3195649257 date "2021-08-25" @default.
• W3195649257 modified "2023-10-02" @default.
• W3195649257 title "<i>In Vitro</i> and <i>In Vivo</i> Studies of Metabolic Activation of Marrubiin, a Bioactive Constituent from <i>Marrubium Vulgare</i>" @default.
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• W3195649257 doi "https://doi.org/10.1021/acs.chemrestox.1c00250" @default.
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