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Fan Y, Chen L, Jing Q, Li X, Pan H, Fang C, Zhang J, Shi F. Covalent Binding of Reactive Anhydride of Cantharidin to Biological Amines. Drug Metab Dispos 2024; 52:775-784. [PMID: 38811155 DOI: 10.1124/dmd.123.001637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/30/2024] [Accepted: 05/19/2024] [Indexed: 05/31/2024] Open
Abstract
Cantharidin is a terpenoid from coleoptera beetles. Cantharidin has been used to treat molluscum contagiosum and some types of tumors. Cantharidin is highly toxic, and cantharidin poisoning and fatal cases have been reported worldwide. The mechanisms underlying cantharidin-induced toxicity remain unclear. Cantharidin contains anhydride, which may react with biologic amines. This study aimed to examine the chemical reactivity of cantharidin toward nucleophiles and characterize adducts of cantharidin with biologic amines in vitro and in mice. Here two types of conjugates were formed in the incubation of cantharidin under physiologic conditions with free amino acids, a mimic peptide, or amine-containing compounds, respectively. Amide-type conjugates were produced by the binding of cantharidin anhydride with the primary amino group of biologic amines. Imide-type conjugates were generated from the dehydration and cyclization of amide-type conjugates. The structure of the conjugates was characterized by using high-resolution mass spectrometry. We introduced the 14N/15N and 79Br/81Br isotope signatures to confirm the formation of conjugates using L-(ε)15N-lysine, L-lysine-15N2, and bromine-tagged hydrazine, respectively. The structure of imide conjugate was also confirmed by nuclear magnetic resonance experiments. Furthermore, the amide and imide conjugates of cantharidin with amino acids or N-acetyl-lysine were detected in mouse liver and urine. Cantharidin was found to modify lysine residue proteins in mouse liver. Pan-cytochrome P450 inhibitor 1-aminobenzotriazole significantly increased the urine cantharidin-N-acetyl-lysine conjugates, whereas it decreased cantharidin metabolites. In summary, cantharidin anhydride can covalently bind to biologic amines nonenzymatically, which facilitates a better understanding of the role of nonenzymatic reactivity in cantharidin poisoning. SIGNIFICANCE STATEMENT: Anhydride moiety of cantharidin can covalently bind to the primary amino group of biological amines nonenzymatically. Amide and imide conjugates were generated after the covalent binding of cantharidin anhydride with the primary amino groups of amino acids, a mimic peptide, and protein lysine residues. The structure of conjugates was confirmed by 14N/15N and 79Br/81Br isotope signatures using isotope-tagged reagents and nuclear magnetic resonance experiments. This study will facilitate the understanding of the role of nonenzymatic reactivity in cantharidin poisoning.
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Affiliation(s)
- Yaya Fan
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
| | - Lin Chen
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
| | - Qiuyi Jing
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
| | - Xiaoli Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
| | - Hong Pan
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
| | - Chao Fang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
| | - Jianyong Zhang
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
| | - Fuguo Shi
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education (Y.F., L.C., Q.J., X.L., H.P., C.F., F.S.), Department of Clinical Pharmacy (H.P.), and Department of Pharmaceutical Analysis (J.Z.), Zunyi Medical University, Zunyi, China; and Department of Pharmacology and Chemical Biology, Shanghai Jiao Tong University School of Medicine, Shanghai, China (C.F.)
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Huang L, Li Y, Pan H, Lu Y, Zhou X, Shi F. Cortex dictamni-induced liver injury in mice: The role of P450-mediated metabolic activation of furanoids. Toxicol Lett 2020; 330:41-52. [PMID: 32437846 DOI: 10.1016/j.toxlet.2020.05.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/11/2020] [Accepted: 05/05/2020] [Indexed: 01/18/2023]
Abstract
Many furan containing compounds have been reported to be toxic resulted from the metabolic activation of the furan ring to reactive metabolite (RM). Cortex Dictamni (CD), a widely used herbal medicine, has been reported to cause severe even fatal hepatotoxicity. The injurious components and mechanism of CD-induced liver injury remain unclear. Our preliminary study showed that dictamnine, one major furanoid in CD, caused mouse liver injury via its reactive epoxide metabolite. Besides dictamnine, the major components of CD are series of bioactivation-alerting furanoids. Thus, we hypothesize that series of furanoids in CD may undergo metabolic activation and play a key role in CD-induced liver injury. Here, a single oral dose of 60 g/kg ethanol extract of CD (ECD) caused severe hepatocellular necrosis in mice at 24 h post-dose. ECD-induced liver injury showed a dose- and time-dependent manner. The hepatotoxic effects could be completely abolished by P450 nonselective inhibitor 1-aminobenzotriazole (ABT) and strongly modulated by other P450 modulators. The furanoids-concentrated fraction of ECD was responsible for the hepatotoxicity. At least ten furanoids with high abundance in ECD, such as obakunone, dictamnine, fraxinellone, limonin, were found to be metabolized to reactive epoxide or cis-enedione. The RM levels were consistent with the liver injury degree. Multiple furanoids, rather than single one, cooperatively contributed to the hepatotoxicity. ECD-induced liver injury could be reproduced by a mixture of pure furanoids. In summary, this study provides toxic component profiles of CD and demonstrates that P450-mediated bioactivation of multiple furanoids is responsible for CD-induced liver injury.
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Affiliation(s)
- Linyan Huang
- Key Laboratory of Basic Pharmacology of Ministry of Education & Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563003, China; Department of Clinical Pharmacy, School of Pharmacy, Zunyi Medical University, Zunyi 563003, China
| | - Yi Li
- Key Laboratory of Basic Pharmacology of Ministry of Education & Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563003, China
| | - Hong Pan
- Department of Clinical Pharmacy, School of Pharmacy, Zunyi Medical University, Zunyi 563003, China
| | - Yuanfu Lu
- Key Laboratory of Basic Pharmacology of Ministry of Education & Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563003, China
| | - Xumei Zhou
- Department of Clinical Pharmacy, School of Pharmacy, Zunyi Medical University, Zunyi 563003, China.
| | - Fuguo Shi
- Key Laboratory of Basic Pharmacology of Ministry of Education & Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi 563003, China.
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Stringer RA, Ferreira S, Rose J, Ronseaux S. Application of Osmotic Pumps for Sustained Release of 1-Aminobenzotriazole and Inhibition of Cytochrome P450 Enzymes in Mice: Model Comparison with the Hepatic P450 Reductase Null Mouse. ACTA ACUST UNITED AC 2016; 44:1213-6. [PMID: 27271368 DOI: 10.1124/dmd.116.070151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 06/03/2016] [Indexed: 11/22/2022]
Abstract
The effectiveness of controlled release 1-aminobenzotriazole (ABT) administration to inhibit cytochrome P450 (P450) enzymes has been evaluated in mice. To maximize the duration of P450 inhibition in vivo, ABT was administered via an osmotic pump. The degree of P450 inhibition was compared with that achieved with a single bolus dose of ABT. Two-hour prior subcutaneous treatment of mice with ABT (50 mg/kg) inhibited antipyrine clearance by 88%. A less pronounced inhibitory effect (29% reduction in clearance) was observed when ABT was administered 24-hours before antipyrine administration, indicating partial restoration of P450 activity during this longer pretreatment time. The duration of ABT in mice was very short (mean residence time = 1.7 hours) after subcutaneous bolus administration. When the inhibitor was delivered by an osmotic pump, maximum blood concentrations of the inhibitor were observed 24 hours after device implantation and were maintained at steady state for 6 days. Inhibition of P450 activity, as measured by antipyrine clearance, was confirmed at 24 hours and 120 hours after pump implantation, highlighting the utility of this method as a longer-term model for P450 inhibition in mice. The magnitude of P450 inhibition in ABT-treated mice was compared with that in hepatic P450 reductase null mice and both models were comparable. In vivo ABT administration by an osmotic pump offers an effective approach for longer-term P450 inhibition in mice and avoids the necessity for multiple dosing of the inhibitor.
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Affiliation(s)
- Rowan A Stringer
- Metabolism and Pharmacokinetics, Novartis Institutes for Biomedical Research, Novartis Pharma AG, Basel, Switzerland (R.A.S); Novartis Institutes for Biomedical Research, Cambridge, Massachusetts (S.F., S.R.); and Novartis Institutes for Biomedical Research, Horsham, West Sussex, United Kingdom (J.R.)
| | - Suzie Ferreira
- Metabolism and Pharmacokinetics, Novartis Institutes for Biomedical Research, Novartis Pharma AG, Basel, Switzerland (R.A.S); Novartis Institutes for Biomedical Research, Cambridge, Massachusetts (S.F., S.R.); and Novartis Institutes for Biomedical Research, Horsham, West Sussex, United Kingdom (J.R.)
| | - Jonathan Rose
- Metabolism and Pharmacokinetics, Novartis Institutes for Biomedical Research, Novartis Pharma AG, Basel, Switzerland (R.A.S); Novartis Institutes for Biomedical Research, Cambridge, Massachusetts (S.F., S.R.); and Novartis Institutes for Biomedical Research, Horsham, West Sussex, United Kingdom (J.R.)
| | - Sebastien Ronseaux
- Metabolism and Pharmacokinetics, Novartis Institutes for Biomedical Research, Novartis Pharma AG, Basel, Switzerland (R.A.S); Novartis Institutes for Biomedical Research, Cambridge, Massachusetts (S.F., S.R.); and Novartis Institutes for Biomedical Research, Horsham, West Sussex, United Kingdom (J.R.)
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