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Bessone F, Hillotte GL, Ahumada N, Jaureguizahar F, Medeot AC, Roma MG. UDCA for Drug-Induced Liver Disease: Clinical and Pathophysiological Basis. Semin Liver Dis 2024; 44:1-22. [PMID: 38378025 DOI: 10.1055/s-0044-1779520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Drug-induced liver injury (DILI) is an adverse reaction to medications and other xenobiotics that leads to liver dysfunction. Based on differential clinical patterns of injury, DILI is classified into hepatocellular, cholestatic, and mixed types; although hepatocellular DILI is associated with inflammation, necrosis, and apoptosis, cholestatic DILI is associated with bile plugs and bile duct paucity. Ursodeoxycholic acid (UDCA) has been empirically used as a supportive drug mainly in cholestatic DILI, but both curative and prophylactic beneficial effects have been observed for hepatocellular DILI as well, according to preliminary clinical studies. This could reflect the fact that UDCA has a plethora of beneficial effects potentially useful to treat the wide range of injuries with different etiologies and pathomechanisms occurring in both types of DILI, including anticholestatic, antioxidant, anti-inflammatory, antiapoptotic, antinecrotic, mitoprotective, endoplasmic reticulum stress alleviating, and immunomodulatory properties. In this review, a revision of the literature has been performed to evaluate the efficacy of UDCA across the whole DILI spectrum, and these findings were associated with the multiple mechanisms of UDCA hepatoprotection. This should help better rationalize and systematize the use of this versatile and safe hepatoprotector in each type of DILI scenarios.
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Affiliation(s)
- Fernando Bessone
- Hospital Provincial del Centenario, Facultad de Ciencias Médicas, Servicio de Gastroenterología y Hepatología, Universidad Nacional de Rosario, Rosario, Argentina
| | - Geraldine L Hillotte
- Instituto de Fisiología Experimental (IFISE-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Natalia Ahumada
- Hospital Provincial del Centenario, Facultad de Ciencias Médicas, Servicio de Gastroenterología y Hepatología, Universidad Nacional de Rosario, Rosario, Argentina
| | - Fernanda Jaureguizahar
- Hospital Provincial del Centenario, Facultad de Ciencias Médicas, Servicio de Gastroenterología y Hepatología, Universidad Nacional de Rosario, Rosario, Argentina
| | | | - Marcelo G Roma
- Instituto de Fisiología Experimental (IFISE-CONICET), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
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2
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Abdullah FO, Hussain FHS, Sardar AS, Gilardoni G, Thu ZM, Vidari G. Bio-Active Compounds from Teucrium Plants Used in the Traditional Medicine of Kurdistan Region, Iraq. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103116. [PMID: 35630593 PMCID: PMC9145536 DOI: 10.3390/molecules27103116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/28/2022] [Accepted: 05/03/2022] [Indexed: 01/11/2023]
Abstract
Herbal medicine is still widely practiced in the Kurdistan Region, Iraq, especially by people living in villages in mountainous regions. Seven taxa belonging to the genus Teucrium (family Lamiaceae) are commonly employed in the Kurdish traditional medicine, especially to treat jaundice, stomachache and abdominal problems. We report, in this paper, a comprehensive account about the chemical structures and bioactivities of most representative specialized metabolites isolated from these plants. These findings indicate that Teucrium plants used in the folk medicine of Iraqi Kurdistan are natural sources of specialized metabolites that are potentially beneficial to human health.
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Affiliation(s)
- Fuad O. Abdullah
- Department of Chemistry, College of Science, Salahaddin University-Erbil, Erbil 44001, Kurdistan Region, Iraq
- Department of Pharmacognosy, Faculty of Pharmacy, Tishk International University, Erbil 44001, Kurdistan Region, Iraq
- Correspondence: (F.O.A.); (G.V.)
| | - Faiq H. S. Hussain
- Department of Medical Analysis, Faculty of Applied Science, Tishk International University, Erbil 44001, Kurdistan Region, Iraq;
| | - Abdullah Sh. Sardar
- Department of Biology, College of Education, Salahaddin University-Erbil, Erbil 44001, Kurdistan Region, Iraq;
| | - Gianluca Gilardoni
- Departamento de Química, Universidad Técnica Particular de Loja, Loja 110107, Ecuador;
| | - Zaw Min Thu
- Department of Chemistry, Kalay University, Kalay 03044, Myanmar;
| | - Giovanni Vidari
- Department of Medical Analysis, Faculty of Applied Science, Tishk International University, Erbil 44001, Kurdistan Region, Iraq;
- Dipartimento di Chimica, Università di Pavia, 27100 Pavia, Italy
- Correspondence: (F.O.A.); (G.V.)
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3
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Li W, Hu Z, Sun C, Wang Y, Li W, Peng Y, Zheng J. A Metabolic Activation-Based Chemoproteomic Platform to Profile Adducted Proteins Derived from Furan-Containing Compounds. ACS Chem Biol 2022; 17:873-882. [PMID: 35353477 DOI: 10.1021/acschembio.1c00917] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human exposure to widespread furan-containing compounds (FCCs) has drawn much attention due to the high risk of their toxicities. Identifying adducted proteins resulting from the metabolic activation of FCCs is the core to learning the mechanism of FCCs' toxic action. We succeeded in establishing a metabolic activation-based chemoproteomic platform to map FCC-derived protein adducts in cultured primary hepatocytes treated with FCCs and to pinpoint the modification sites, using click chemistry but without alkynylation or azidation of FCCs to be investigated. The proposed platform was systematically verified by biomimetic synthesis, liver microsomal incubation, and primary hepatocyte culture. A mixture of furan, 2-methylfuran, and 2,5-dimethylfuran as model was tested by use of the established platform. A total of hepatic 171 lysine-based adducted proteins and 145 cysteine-based adducted proteins by the reactive metabolites of the three FCCs were enriched and identified (Byonic score ≥ 100). The target proteins were found to mainly participate in ATP synthesis. The technique was also successfully applied to furan-containing natural products. The established platform made it possible to profile covalently adducted proteins, because of potential exposure to a vast inventory of over two million of FCCs documented.
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Affiliation(s)
- Wei Li
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China
| | - Zixia Hu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China
| | - Chen Sun
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China
| | - Yuwei Wang
- Department of Pharmacognosy and Utilization Key Laboratory of Northeast Plant Materials, School of Traditional Chinese Medicine, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
| | - Weiwei Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang, Guizhou 550025, P. R. China
| | - Ying Peng
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China
| | - Jiang Zheng
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang, Guizhou 550025, P. R. China
- Key Laboratory of Environmental Pollution, Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, 550025, P. R. China
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4
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Tian M, Peng Y, Zheng J. Metabolic Activation and Hepatotoxicity of Furan-containing Compounds. Drug Metab Dispos 2022; 50:655-670. [DOI: 10.1124/dmd.121.000458] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 01/18/2022] [Indexed: 11/22/2022] Open
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5
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Fan W, Fan L, Wang Z, Yang L. Limonoids From the Genus Melia (Meliaceae): Phytochemistry, Synthesis, Bioactivities, Pharmacokinetics, and Toxicology. Front Pharmacol 2022; 12:795565. [PMID: 35140606 PMCID: PMC8819599 DOI: 10.3389/fphar.2021.795565] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/06/2021] [Indexed: 12/17/2022] Open
Abstract
Limonoids, as the vital bioactive chemical compounds in genus Melia plants, have attracted significant attention owing to their exclusive structural characteristics and remarkable biological activity. These compounds can be usually classified into two categories, including the ring-intact group and the ring-C-seco group. Benefiting from the development of separation and analysis technology, more than 200 limonoids have been isolated and identified from this genus. There is growing evidence that limonoids from genus Melia possess diverse pharmacological activities, especially anti-cancer effects, insecticidal activities, and anti-botulism effects. Toosendanin, one of the paramount limonoids, was considered as the pivotal bioactive marker in two medicinal herbs, including Melia toosendan Sieb. et Zucc and Melia azedarach L. In particular, limonoids are found to exhibit non-negligible toxic effects, a finding which needs further research. Besides this, the lack of clinical research data seriously hinders its further development and utilization, and necessary clinical trials should be taken into consideration. In this review, we systematically summarized the phytochemical compounds and their synthesis methods, pharmacological activities, and the structure–activity relationship, pharmacokinetics, and toxicology of genus Melia-derived limonoids. We believe that this up-to-date review could provide scientific evidence for the application of limonoids as agents beneficial to health in future clinical practice.
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Affiliation(s)
- Wenxiang Fan
- The MOE Key Laboratory of Standardization of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Linhong Fan
- The MOE Key Laboratory of Standardization of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhengtao Wang
- The MOE Key Laboratory of Standardization of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Zhengtao Wang, ; Li Yang,
| | - Li Yang
- The MOE Key Laboratory of Standardization of Chinese Medicines, Shanghai Key Laboratory of Compound Chinese Medicines, and SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines, Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Shanghai Frontiers Science Center of TCM Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- *Correspondence: Zhengtao Wang, ; Li Yang,
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6
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Sadeghi Z, Yang JL, Venditti A, Moridi Farimani M. A review of the phytochemistry, ethnopharmacology and biological activities of Teucrium genus (Germander). Nat Prod Res 2022; 36:5647-5664. [PMID: 34986708 DOI: 10.1080/14786419.2021.2022669] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Teucrium L (Lamiaceae) is mainly distributed in the Mediterranean area. A comprehensive survey in the electronic databases (during 2000-2020 years) with keywords of 'Teucrium' and 'Germander' showed that chemical analyses are available for 27 species, with sesquiterpenoids, iridoids, di and triterpenoids, and phenolic compounds as identified structures. The neo-clerodane diterpenoids as potential chemotaxonomic markers were the main compounds of this genus. As a result, Italy and Turkey have good attempts at phytochemical analysis. The pharmacological activities of different species including antioxidant, cytotoxic activity, antidiabetic, antimicrobial, anti-inflammatory and anti-insect have been summarized. Teucrium polium and Teucrium chamaedrys mainly have been used in digestive problems and diabetes in traditional medicine. Evidence-based clinical trials are needed to confirm the therapeutic properties of this genus. As well to the popularity of Asian and Anatolian species as ingredients in contemporary medicines and products, further research is required in comparison to European species.
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Affiliation(s)
- Zahra Sadeghi
- Department of Production and Utilization of Medicinal Plants, Faculty of Agricultural and Natural Resources, Higher Educational Complex of Saravan, Sistan and Baluchestan, Iran
| | - Jun-Li Yang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences (CAS), Lanzhou, 730000, PR China
| | | | - Mahdi Moridi Farimani
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Evin, Tehran, Iran
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7
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Wang MR, He JY, He JX, Liu KK, Yang J. A Paal-Knorr agent for chemoproteomic profiling of targets of isoketals in cells. Chem Sci 2021; 12:14557-14563. [PMID: 34881007 PMCID: PMC8580055 DOI: 10.1039/d1sc02230j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 10/14/2021] [Indexed: 12/13/2022] Open
Abstract
Natural systems produce various γ-dicarbonyl-bearing compounds that can covalently modify lysine in protein targets via the classic Paal-Knorr reaction. Among them is a unique class of lipid-derived electrophiles - isoketals that exhibit high chemical reactivity and critical biological functions. However, their target selectivity and profiles in complex proteomes remain unknown. Here we report a Paal-Knorr agent, 4-oxonon-8-ynal (herein termed ONAyne), for surveying the reactivity and selectivity of the γ-dicarbonyl warhead in biological systems. Using an unbiased open-search strategy, we demonstrated the lysine specificity of ONAyne on a proteome-wide scale and characterized six probe-derived modifications, including the initial pyrrole adduct and its oxidative products (i.e., lactam and hydroxylactam adducts), an enlactam adduct from dehydration of hydroxylactam, and two chemotypes formed in the presence of endogenous formaldehyde (i.e., fulvene and aldehyde adducts). Furthermore, combined with quantitative chemoproteomics in a competitive format, ONAyne permitted global, in situ, and site-specific profiling of targeted lysine residues of two specific isomers of isoketals, levuglandin (LG) D2 and E2. The functional analyses reveal that LG-derived adduction drives inhibition of malate dehydrogenase MDH2 and exhibits a crosstalk with two epigenetic marks on histone H2B in macrophages. Our approach should be broadly useful for target profiling of bioactive γ-dicarbonyls in diverse biological contexts.
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Affiliation(s)
- Min-Ran Wang
- State Key Laboratory of Proteomics, National Center for Protein Sciences - Beijing, Beijing Proteome Research Center, Beijing Institute of Lifeomics 38 Life Sci. Park Road, Changping District Beijing 102206 China
| | - Jing-Yang He
- State Key Laboratory of Proteomics, National Center for Protein Sciences - Beijing, Beijing Proteome Research Center, Beijing Institute of Lifeomics 38 Life Sci. Park Road, Changping District Beijing 102206 China
| | - Ji-Xiang He
- State Key Laboratory of Proteomics, National Center for Protein Sciences - Beijing, Beijing Proteome Research Center, Beijing Institute of Lifeomics 38 Life Sci. Park Road, Changping District Beijing 102206 China
| | - Ke-Ke Liu
- State Key Laboratory of Proteomics, National Center for Protein Sciences - Beijing, Beijing Proteome Research Center, Beijing Institute of Lifeomics 38 Life Sci. Park Road, Changping District Beijing 102206 China
| | - Jing Yang
- State Key Laboratory of Proteomics, National Center for Protein Sciences - Beijing, Beijing Proteome Research Center, Beijing Institute of Lifeomics 38 Life Sci. Park Road, Changping District Beijing 102206 China
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8
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Wang YK, Li WQ, Xia S, Guo L, Miao Y, Zhang BK. Metabolic Activation of the Toxic Natural Products From Herbal and Dietary Supplements Leading to Toxicities. Front Pharmacol 2021; 12:758468. [PMID: 34744736 PMCID: PMC8564355 DOI: 10.3389/fphar.2021.758468] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 10/05/2021] [Indexed: 12/24/2022] Open
Abstract
Currently, herbal and dietary supplements have been widely applied to prevent and treat various diseases. However, the potential toxicities and adverse reactions of herbal and dietary supplements have been increasingly reported, and have gradually attracted widespread attention from clinical pharmacists and physicians. Metabolic activation of specific natural products from herbal and dietary supplements is mediated by hepatic cytochrome P450 or intestinal bacteria, and generates chemical reactive/toxic metabolites that bind to cellular reduced glutathione or macromolecules, and form reactive metabolites-glutathione/protein/DNA adducts, and these protein/DNA adducts can result in toxicities. The present review focuses on the relation between metabolic activation and toxicities of natural products, and provides updated, comprehensive and critical comment on the toxic mechanisms of reactive metabolites. The key inductive role of metabolic activation in toxicity is highlighted, and frequently toxic functional groups of toxic natural products were summarized. The biotransformation of drug cytochrome P450 or intestinal bacteria involved in metabolic activation were clarified, the reactive metabolites-protein adducts were selected as biomarkers for predicting toxicity. And finally, further perspectives between metabolic activation and toxicities of natural products from herbal and dietary supplements are discussed, to provide a reference for the reasonable and safe usage of herbal and dietary supplements.
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Affiliation(s)
- Yi-Kun Wang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
- Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Wen Qun Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
- Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Shuang Xia
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lin Guo
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yan Miao
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
- Institute of Clinical Pharmacy, Central South University, Changsha, China
| | - Bi-Kui Zhang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, China
- Institute of Clinical Pharmacy, Central South University, Changsha, China
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9
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Lin Q, Guan H, Ma C, Chen L, Cao L, Liu H, Cheng X, Wang C. Biotransformation patterns of dictamnine in vitro/in vivo and its relative molecular mechanism of dictamnine-induced acute liver injury in mice. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2021; 85:103628. [PMID: 33652109 DOI: 10.1016/j.etap.2021.103628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/12/2021] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
Dictamnine (DIC), a typical furan-quinoline alkaloid, has a wide range of pharmacological and toxicological effects, such as anti-bacterial, antifungal, anti-cancer, and hepatoxicity. But the molecular mechanism of DIC-induced hepatoxicity in mice remains unclear. This study aimed to clarify the biotransformation patterns of DIC in vitro/in vivo and the relative molecular mechanism of DIC-induced hepatoxicity in mice. All metabolites of DIC were identified by comparing the blank and drug-containing urine, feces, plasma, and liver samples. The structure of epoxide intermediate derived from DIC was confirmed by trapping assay. Oxidative stress injury and inflammation have been confirmed to be involved in the toxicological process of DIC-induced hepatoxicity in mice by detecting the relative biochemical indexes. The results will help to develop a deeper understanding about the biotransformation patterns of DIC, structure of the epoxide intermediate, and the molecular mechanism of DIC-induced hepatoxicity in mice.
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Affiliation(s)
- Qiyan Lin
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China
| | - Huida Guan
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China
| | - Chao Ma
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China
| | - Liangni Chen
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China
| | - Lanlan Cao
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China
| | - Hanze Liu
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China
| | - Xuemei Cheng
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China
| | - Changhong Wang
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, The MOE Key Laboratory for Standardization of Chinese Medicines, Shanghai R&D Centre for Standardization of Chinese Medicines, 1200 Cailun Road, Shanghai, 201203, China.
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10
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Cho H, Shen Q, Zhang LH, Okumura M, Kawakami A, Ambrose J, Sigoillot F, Miller HR, Gleim S, Cobos-Correa A, Wang Y, Piechon P, Roma G, Eggimann F, Moore C, Aspesi P, Mapa FA, Burks H, Ross NT, Krastel P, Hild M, Maimone TJ, Fisher DE, Nomura DK, Tallarico JA, Canham SM, Jenkins JL, Forrester WC. CYP27A1-dependent anti-melanoma activity of limonoid natural products targets mitochondrial metabolism. Cell Chem Biol 2021; 28:1407-1419.e6. [PMID: 33794192 DOI: 10.1016/j.chembiol.2021.03.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/24/2021] [Accepted: 03/09/2021] [Indexed: 01/18/2023]
Abstract
Three limonoid natural products with selective anti-proliferative activity against BRAF(V600E) and NRAS(Q61K)-mutation-dependent melanoma cell lines were identified. Differential transcriptome analysis revealed dependency of compound activity on expression of the mitochondrial cytochrome P450 oxidase CYP27A1, a transcriptional target of melanogenesis-associated transcription factor (MITF). We determined that CYP27A1 activity is necessary for the generation of a reactive metabolite that proceeds to inhibit cellular proliferation. A genome-wide small interfering RNA screen in combination with chemical proteomics experiments revealed gene-drug functional epistasis, suggesting that these compounds target mitochondrial biogenesis and inhibit tumor bioenergetics through a covalent mechanism. Our work suggests a strategy for melanoma-specific targeting by exploiting the expression of MITF target gene CYP27A1 and inhibiting mitochondrial oxidative phosphorylation in BRAF mutant melanomas.
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Affiliation(s)
- Hyelim Cho
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Qiong Shen
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Lydia H Zhang
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA; Novartis-Berkeley Center for Proteomics and Chemistry Technologies, Berkeley, CA 94720, USA
| | - Mikiko Okumura
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA; Novartis-Berkeley Center for Proteomics and Chemistry Technologies, Berkeley, CA 94720, USA
| | - Akinori Kawakami
- Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Jessi Ambrose
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Frederic Sigoillot
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Howard R Miller
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Scott Gleim
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Amanda Cobos-Correa
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Forum 1 Novartis Campus, 4056 Basel, Switzerland
| | - Ying Wang
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Forum 1 Novartis Campus, 4056 Basel, Switzerland
| | - Philippe Piechon
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Forum 1 Novartis Campus, 4056 Basel, Switzerland
| | - Guglielmo Roma
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Forum 1 Novartis Campus, 4056 Basel, Switzerland
| | - Fabian Eggimann
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Forum 1 Novartis Campus, 4056 Basel, Switzerland
| | - Charles Moore
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Forum 1 Novartis Campus, 4056 Basel, Switzerland
| | - Peter Aspesi
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Felipa A Mapa
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Heather Burks
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Nathan T Ross
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Philipp Krastel
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Forum 1 Novartis Campus, 4056 Basel, Switzerland
| | - Marc Hild
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Thomas J Maimone
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA; Novartis-Berkeley Center for Proteomics and Chemistry Technologies, Berkeley, CA 94720, USA
| | - David E Fisher
- Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Daniel K Nomura
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA; Novartis-Berkeley Center for Proteomics and Chemistry Technologies, Berkeley, CA 94720, USA; Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA; Department of Nutritional Sciences and Toxicology, University of California, Berkeley, CA 94720, USA; Innovative Genomics Institute, Berkeley, CA 94720, USA
| | - John A Tallarico
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA; Novartis-Berkeley Center for Proteomics and Chemistry Technologies, Berkeley, CA 94720, USA
| | - Stephen M Canham
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA; Novartis-Berkeley Center for Proteomics and Chemistry Technologies, Berkeley, CA 94720, USA
| | - Jeremy L Jenkins
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA.
| | - William C Forrester
- Novartis Institutes for BioMedical Research, 181 Massachusetts Avenue, Cambridge, MA 02139, USA.
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11
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Geib T, Thulasingam M, Haeggström JZ, Sleno L. Investigation of Clozapine and Olanzapine Reactive Metabolite Formation and Protein Binding by Liquid Chromatography-Tandem Mass Spectrometry. Chem Res Toxicol 2020; 33:2420-2431. [PMID: 32786547 DOI: 10.1021/acs.chemrestox.0c00191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Drug-induced toxicity has, in many cases, been linked to oxidative metabolism resulting in the formation of reactive metabolites and subsequent covalent binding to biomolecules. Two structurally related antipsychotic drugs, clozapine (CLZ) and olanzapine (OLZ), are known to form similar nitrenium ion reactive metabolites. CLZ-derived reactive metabolites have been linked to agranulocytosis and hepatotoxicity. We have studied the oxidative metabolism of CLZ and OLZ as well as two known metabolites of CLZ, desmethyl-CLZ (DCLZ), and CLZ-N-oxide (CLZ-NO), using in vitro rat liver microsomal (RLM) incubations with glutathione (GSH) trapping of reactive metabolites and liquid chromatography-high resolution tandem mass spectrometry (LC-HRMS/MS). Reactive metabolite binding to selected standard peptides and recombinant purified human proteins was also evaluated. Bottom-up proteomics was performed using two complementary proteases, prefractionation of peptides followed by LC-HRMS/MS for elucidating modifications of target proteins. Induced RLM was selected to form reactive metabolites enzymatically to assess the complex profile of reactive metabolite structures and their binding potential to standard human proteins. Multiple oxidative metabolites and several different GSH adducts were found for CLZ and OLZ. Modification sites were characterized on human glutathione S-transferase (hGST) alpha 1 (OLZ-modified at Cys112), hGST mu 2 (OLZ at Cys115), and hGST pi (CLZ, DCLZ, CLZ-NO and OLZ at Cys170), human microsomal GST 1 (hMGST1, CLZ and OLZ at Cys50), and human serum albumin (hSA, CLZ at Cys34). Furthermore, two modified rat proteins, microsomal GST 1 (CLZ and OLZ at Cys50) and one CYP (OLZ-modified, multiple possible isoforms), from RLM background were also characterized. In addition, direct effects of the reactive metabolite modifications on proteins were observed, including differences in protease cleavage specificity, chromatographic behavior, and charge-state distributions.
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Affiliation(s)
- Timon Geib
- Chemistry Department, Université du Québec à Montréal, Montréal, Québec H2X 2J6, Canada
| | - Madhuranayaki Thulasingam
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, 171 77 Solna, Sweden
| | - Jesper Z Haeggström
- Division of Physiological Chemistry II, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, 171 77 Solna, Sweden
| | - Lekha Sleno
- Chemistry Department, Université du Québec à Montréal, Montréal, Québec H2X 2J6, Canada
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12
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Wen B, Gorycki P. Bioactivation of herbal constituents: mechanisms and toxicological relevance. Drug Metab Rev 2019; 51:453-497. [DOI: 10.1080/03602532.2019.1655570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Bo Wen
- Department of Drug Metabolism and Pharmacokinetics, GlaxoSmithKline, Collegeville, PA, USA
| | - Peter Gorycki
- Department of Drug Metabolism and Pharmacokinetics, GlaxoSmithKline, Collegeville, PA, USA
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13
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Li ZQ, Jiang LL, Zhao DS, Zhou J, Wang LL, Wu ZT, Zheng X, Shi ZQ, Li P, Li HJ. The Modulatory Role of CYP3A4 in Dictamnine-Induced Hepatotoxicity. Front Pharmacol 2018; 9:1033. [PMID: 30283337 PMCID: PMC6156363 DOI: 10.3389/fphar.2018.01033] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 08/27/2018] [Indexed: 12/12/2022] Open
Abstract
Dictamni Cortex (DC) has been reported to be associated with acute hepatitis in clinic and may lead to a selective sub-chronic hepatotoxicity in rats. Nevertheless, the potent toxic ingredient and the underlying mechanism remain unknown. Dictamnine (DTN), the main alkaloid from DC, possesses a furan ring which was suspected of being responsible for hepatotoxicity via metabolic activation primarily by CYP3A4. Herein, the present study aimed to evaluate the role of CYP3A4 in DTN-induced liver injury. The in vitro results showed that the EC50 values in primary human hepatocytes (PHH), L02, HepG2 and NIH3T3 cells were correlated with the CYP3A4 expression levels in corresponding cells. Furthermore, the toxicity was increased in CYP3A4-induced PHH by rifampicin, and CYP3A4 over-expressed (OE) HepG2 and L02 cells. Contrarily, the cytotoxicity was decreased in CYP3A4-inhibited PHH and CYP3A4 OE HepG2 and L02 cells inhibited by ketoconazole (KTZ). In addition, the hepatotoxicity of DTN in enzyme induction/inhibition mice was further investigated in the aspects of biochemistry, histopathology, and pharmacokinetics. Administration of DTN in combination with KTZ resulted in attenuated liver injury, including lower alanine transaminase and aspartate transaminase activities and greater AUC and Cmax of serum DTN, whereas, pretreatment with dexamethasone aggravated the injury. Collectively, our findings illustrated that DTN-induced hepatotoxicity correlated well with the expression of CYP3A4, namely inhibition of CYP3A4 alleviated the toxicity both in vitro and in vivo, and induction aggravated the toxicity effects.
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Affiliation(s)
- Zhuo-Qing Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Li-Long Jiang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Dong-Sheng Zhao
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Jing Zhou
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Ling-Li Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Zi-Tian Wu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Xian Zheng
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Zi-Qi Shi
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, China
| | - Ping Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Hui-Jun Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
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14
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Liu Y. Incorporation of absorption and metabolism into liver toxicity prediction for phytochemicals: A tiered in silico QSAR approach. Food Chem Toxicol 2018; 118:409-415. [DOI: 10.1016/j.fct.2018.05.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 04/05/2018] [Accepted: 05/16/2018] [Indexed: 02/06/2023]
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15
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Hepatotoxicity of Herbal Supplements Mediated by Modulation of Cytochrome P450. Int J Mol Sci 2017; 18:ijms18112353. [PMID: 29117101 PMCID: PMC5713322 DOI: 10.3390/ijms18112353] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/03/2017] [Accepted: 11/03/2017] [Indexed: 12/11/2022] Open
Abstract
Herbal supplements are a significant source of drug-drug interactions (DDIs), herb-drug interactions, and hepatotoxicity. Cytochrome P450 (CYP450) enzymes metabolize a large number of FDA-approved pharmaceuticals and herbal supplements. This metabolism of pharmaceuticals and supplements can be augmented by concomitant use of either pharmaceuticals or supplements. The xenobiotic receptors constitutive androstane receptor (CAR) and the pregnane X receptor (PXR) can respond to xenobiotics by increasing the expression of a large number of genes that are involved in the metabolism of xenobiotics, including CYP450s. Conversely, but not exclusively, many xenobiotics can inhibit the activity of CYP450s. Induction of the expression or inhibition of the activity of CYP450s can result in DDIs and toxicity. Currently, the United States (US) Food and Drug Administration does not require the investigation of the interactions of herbal supplements and CYP450s. This review provides a summary of herbal supplements that inhibit CYP450s, induce the expression of CYP450s, and/or whose toxicity is mediated by CYP450s.
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16
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Lin D, Wang K, Guo X, Gao H, Peng Y, Zheng J. Lysine- and cysteine-based protein adductions derived from toxic metabolites of 8-epidiosbulbin E acetate. Toxicol Lett 2016; 264:20-28. [DOI: 10.1016/j.toxlet.2016.10.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 09/27/2016] [Accepted: 10/10/2016] [Indexed: 10/20/2022]
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17
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Lu X, Ji C, Tong W, Lian X, Wu Y, Fan X, Gao Y. Integrated analysis of microRNA and mRNA expression profiles highlights the complex and dynamic behavior of toosendanin-induced liver injury in mice. Sci Rep 2016; 6:34225. [PMID: 27703232 PMCID: PMC5050432 DOI: 10.1038/srep34225] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 09/01/2016] [Indexed: 01/04/2023] Open
Abstract
Triterpenoid Toosendanin (TSN) exhibits a plenty of pharmacological effects in human and great values in agriculture. However, the hepatotoxicity caused by TSN or Melia-family plants containing TSN used in traditional Chinese medicine has been reported, and the mechanisms of TSN-induced liver injury (TILI) still remain largely unknown. In this study, the dose- and time-dependent effects of TSN on mice liver were investigated by an integrated microRNA-mRNA approach as well as the general toxicological assessments. As the results, the dose- and time-dependent liver injury and alterations in global microRNA and mRNA expressions were detected. Particularly, 9-days 80 mg/kg TSN exposure caused most serious liver injury in mice, and the hepatic adaptation to TILI was unexpectedly observed after 21-days 80 mg/kg TSN administration. Based on the pathway analysis of the intersections between predicted targets of differentially expressed microRNAs and differentially expressed mRNAs at three time points, it revealed that TILI may be caused by glutathione depletion, mitochondrial dysfunction and lipid dysmetabolism, ultimately leading to hepatocytes necrosis in liver, while liver regeneration may play an important role in the hepatic adaptation to TILI. Our results demonstrated that the integrated microRNA-mRNA approach could provide new insight into the complex and dynamic behavior of TILI.
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Affiliation(s)
- Xiaoyan Lu
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Cai Ji
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wei Tong
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xueping Lian
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ying Wu
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaohui Fan
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yue Gao
- Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, Beijing 100850, China
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18
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Golizeh M, Geib T, Sleno L. Identification of 4-hydroxynonenal protein targets in rat, mouse and human liver microsomes by two-dimensional liquid chromatography/tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:1488-1494. [PMID: 27321836 DOI: 10.1002/rcm.7577] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 03/30/2016] [Accepted: 04/01/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE 4-Hydroxynonenal (HNE), endogenously generated through peroxidation and breakdown of polyunsaturated fatty acids, has been linked to a number of adverse biological effects through carbonylation of essential biomolecules. Covalent binding of HNE to proteins can alter their structure and functions, causing cell damage as well as adverse immune responses. The liver plays a predominant role in metabolic transformations and hepatic proteins are often targeted by reactive metabolites. METHODS Rat, mouse and human liver microsomes were incubated with HNE, enzymatically digested, and subjected to strong cation-exchange peptide fractionation prior to liquid chromatography/tandem mass spectrometry (LC/MS/MS) analysis coupled to electrospray ionization quadrupole time-of-flight (QqTOF) mass spectrometry. HNE-modified peptides were detected by probability-driven peptide spectral matching and comparative analysis between treated and control samples, and confirmed based on accurate mass and high-resolution MS/MS spectra. RESULTS A total of 99, 123 and 51 HNE-modified peptides were identified in rat, mouse and human liver microsomes related to 76, 103 and 44 target proteins, respectively. Eight proteins were found to be adducted by HNE in all three species, including ATP synthase, carbamoyl phosphate synthase, cytochrome P450 1A2, glutamate dehydrogenase 1, protein ERGIC-53, protein disulfide-isomerase, and voltage-dependent anion-selective channel protein 1. These proteins play crucial roles in cellular processes and their covalent modification could potentially alter their function and lead to cytotoxicity. CONCLUSIONS An analytical approach was developed for the identification of in vitro HNE protein targets in rat, mouse and human liver microsomes using two-dimensional (2D) LC/MS/MS. This approach can be applied to study HNE modification of proteins in vitro and in vivo, providing insight into the toxicology of HNE protein adduction. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Makan Golizeh
- Chemistry Department/Pharmaqam, Université du Québec à Montréal (UQÀM), Montréal, QC, Canada
| | - Timon Geib
- Chemistry Department/Pharmaqam, Université du Québec à Montréal (UQÀM), Montréal, QC, Canada
| | - Lekha Sleno
- Chemistry Department/Pharmaqam, Université du Québec à Montréal (UQÀM), Montréal, QC, Canada
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19
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Bendikov MY, Miners JO, Simpson BS, Elliot DJ, Semple SJ, Claudie DJ, McKinnon RA, Gillam EMJ, Sykes MJ. In vitro metabolism of the anti-inflammatory clerodane diterpenoid polyandric acid A and its hydrolysis product by human liver microsomes and recombinant cytochrome P450 and UDP-glucuronosyltransferase enzymes. Xenobiotica 2016; 47:461-469. [DOI: 10.1080/00498254.2016.1203041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Matthew Y. Bendikov
- Department of Clinical Pharmacology, School of Medicine, Flinders University, Adelaide, Australia,
- Centre for Drug Discovery and Development, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia,
| | - John O. Miners
- Department of Clinical Pharmacology, School of Medicine, Flinders University, Adelaide, Australia,
- Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, Adelaide, Australia,
| | - Bradley S. Simpson
- Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, Adelaide, Australia,
- Quality Use of Medicines and Pharmacy Research Centre, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia,
| | - David J. Elliot
- Department of Clinical Pharmacology, Flinders Medical Centre, Adelaide, Australia,
| | - Susan J. Semple
- Quality Use of Medicines and Pharmacy Research Centre, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia,
| | - David J. Claudie
- Chuulangun Aboriginal Corporation, Cairns Mail Centre, Cairns, Australia, and
| | - Ross A. McKinnon
- Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, Adelaide, Australia,
| | - Elizabeth M. J. Gillam
- School of Chemistry and Molecular Biosciences, the University of Queensland, Brisbane, Australia
| | - Matthew J. Sykes
- Centre for Drug Discovery and Development, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia,
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20
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Ramm S, Limbeck E, Mally A. Functional and cellular consequences of covalent target protein modification by furan in rat liver. Toxicology 2016; 361-362:49-61. [PMID: 27402187 DOI: 10.1016/j.tox.2016.06.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 06/27/2016] [Accepted: 06/27/2016] [Indexed: 12/11/2022]
Abstract
Furan hepatotoxicity is thought to be linked to covalent binding of its reactive metabolite, cis-2-butene-1,4-dial, to hepatic proteins critical for cell homeostasis and survival. We previously identified 61 putative furan target proteins, which participate in various cellular processes including carbohydrate metabolism, fatty acid β-oxidation, adenosine triphosphate (ATP) synthesis, protein folding and maintenance of redox homeostasis. To further investigate the biological significance of target protein modification, this study was designed to determine the impact of furan on the activity of key target enzymes involved in glycolysis, β-oxidation, ATP synthesis, and redox regulation in rat liver, and to link these functional changes to alterations in cellular processes. While cis-2-butene-1,4-dial inhibited thioredoxin 1 (Txn1) in a cell-free assay, in livers of rats treated with a single high dose of furan Txn1 activity was markedly increased due to rapid up-regulation of Txn1 mRNA expression. Significant inhibition of glyceraldehyde-3-phosphate dehydrogenase and metabolic changes consistent with blocked glycolytic breakdown of glucose were observed in rat liver in response to a single high dose of furan. In contrast, furan treatment resulted in increased activity of enoyl-CoA hydratase and enhanced production of ketone bodies, indicative of increased utilization of fatty acids as energy source. Consistent with changes in TCA cycle metabolites, furan treatment resulted in a reduction of succinate dehydrogenase activity, supporting mitochondrial dysfunction as a critical event in furan toxicity. No significant changes in target protein function were observed following repeated administration of furan at lower dose (0.1 and 0.5mg/kg bw for 4 weeks) closer to estimated human exposure to furan via food. Although the relative contribution of furan mediated alterations in metabolic pathways and antioxidant defense to the overall toxic response to furan, including considerations of dose and time, remains to be established, our work contributes to mapping biological processes and toxicity pathways modulated by reactive electrophiles.
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Affiliation(s)
- Susanne Ramm
- Department of Toxicology, University of Würzburg, 97078 Würzburg, Germany
| | - Elisabeth Limbeck
- Department of Toxicology, University of Würzburg, 97078 Würzburg, Germany
| | - Angela Mally
- Department of Toxicology, University of Würzburg, 97078 Würzburg, Germany.
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21
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Lin D, Li W, Peng Y, Jiang C, Xu Y, Gao H, Zheng J. Role of Metabolic Activation in 8-Epidiosbulbin E Acetate-Induced Liver Injury: Mechanism of Action of the Hepatotoxic Furanoid. Chem Res Toxicol 2016; 29:359-66. [DOI: 10.1021/acs.chemrestox.5b00501] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | | | | | | | | | | | - Jiang Zheng
- Center
for Developmental Therapeutics, Seattle Children’s Research
Institute, Division of Gastroenterology and Hepatology, Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington 98101, United States
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22
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Ballard TE, Dahal UP, Bessire AJ, Schneider RP, Geoghegan KF, Vaz ADN. A tag-free collisionally induced fragmentation approach to detect drug-adducted proteins by mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:2175-2183. [PMID: 26467230 DOI: 10.1002/rcm.7375] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 08/10/2015] [Accepted: 08/25/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE The covalent modification of proteins by toxicants, new chemical entities or drug molecules, either by metabolic activation or the presence of inherently reactive functional groups, is commonly implicated in organ toxicity and idiosyncratic reactions. In efforts to better prosecute protein modifications, we investigated a tag-free technique capable of detecting protein-small molecule adducts based solely on the collision-induced dissociation (CID) of the protein-small molecule complex. Detection of proteins using unique CID small molecule (SM) product ions would mitigate common issues associated with tagging technologies (e.g., altered reactivity/affinity of the protein-SM complex). METHODS A Waters SYNAPT G2 mass spectrometer (MS) was operated in MS(e) mode with appropriate collision energy conditions during the MS(2) acquisition for fragmentation of protein-small molecule adducts to generate characteristic small molecule product ions. RESULTS Ibrutinib, an acrylamide-containing small molecule drug, was shown to form adducts with rat serum albumin in ex vivo experiments and these adducts were detected by relying solely on the CID product ions generated from ibrutinib. Additionally, ibrutinib produced three CID product ions, one of which was a selective protein-ibrutinib fragment ion not produced by the compound alone. CONCLUSIONS Herein we describe a tag-free mass spectral detection technique for protein-small molecule conjugates that relies on the unique product ion fragmentation profile of the small molecule. This technique allows the detection of macromolecular ions containing the adducted small molecule from complex protein matrices through mass range selection for the unique product ions in the CID spectra.
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Affiliation(s)
- T Eric Ballard
- Pharmacokinetics, Dynamics and Metabolism, Pfizer, Inc., Groton, CT, 06340, USA
| | - Upendra P Dahal
- Pharmacokinetics, Dynamics and Metabolism, Pfizer, Inc., Groton, CT, 06340, USA
| | - Andrew J Bessire
- Pharmacokinetics, Dynamics and Metabolism, Pfizer, Inc., Groton, CT, 06340, USA
| | - Richard P Schneider
- Pharmacokinetics, Dynamics and Metabolism, Pfizer, Inc., Groton, CT, 06340, USA
| | | | - Alfin D N Vaz
- Pharmacokinetics, Dynamics and Metabolism, Pfizer, Inc., Groton, CT, 06340, USA
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23
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Golizeh M, LeBlanc A, Sleno L. Identification of Acetaminophen Adducts of Rat Liver Microsomal Proteins using 2D-LC-MS/MS. Chem Res Toxicol 2015; 28:2142-50. [DOI: 10.1021/acs.chemrestox.5b00317] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Makan Golizeh
- Chemistry
Department/Pharmaqam, Université du Québec à Montréal (UQÀM), Montréal, Québec H2X 2J6, Canada
| | - André LeBlanc
- Chemistry
Department/Pharmaqam, Université du Québec à Montréal (UQÀM), Montréal, Québec H2X 2J6, Canada
| | - Lekha Sleno
- Chemistry
Department/Pharmaqam, Université du Québec à Montréal (UQÀM), Montréal, Québec H2X 2J6, Canada
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24
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Nencini C, Galluzzi P, Pippi F, Menchiari A, Micheli L. Hepatotoxicity of Teucrium chamaedrys L. decoction: role of difference in the harvesting area and preparation method. Indian J Pharmacol 2014; 46:181-4. [PMID: 24741190 PMCID: PMC3987187 DOI: 10.4103/0253-7613.129313] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 06/10/2013] [Accepted: 01/23/2014] [Indexed: 11/06/2022] Open
Abstract
Aim: Two recurrent cases of severe acute liver injury attributed to the use of a wild germander decoction, prepared with some variation in traditional method has been reported. The aim of the present study was to correlate the hepatotoxic effect observed in patients who consumed germander decoction with teucrin A levels. Antioxidant properties were analyzed to assess any possible differences between the decoction used traditionally by the family (without negative consequences) and the decoction taken by the patients. Materials and Methods: Different types of germander decoctions were prepared in the laboratory by simulating the same conditions for preparing the decoction by the patients and their family members. The levels of teucrin A, the polyphenols and the antioxidant power were determined. One-way analysis of variance was used to test for differences between the groups. Results and Conclusions: The extract consumed by the patients had higher concentration of teucrin A, lower antioxidant activity and lower content of polyphenols compared with the traditional decoction, revealing an inverse relationship between teucrin A content and antioxidant capacity. These case reports emphasize that more information is needed on the safety and quality of these natural products.
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Affiliation(s)
- Cristina Nencini
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Paola Galluzzi
- Department of Internal Medicine and Medical Specialties, Division of Infectious Diseases and Hepatology, "S. Maria alle Scotte" Hospital, Siena, Italy
| | - Francesco Pippi
- Department of Internal Medicine and Medical Specialties, Division of Infectious Diseases and Hepatology, "S. Maria alle Scotte" Hospital, Siena, Italy
| | | | - Lucia Micheli
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
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25
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Shuck SC, Wauchope OR, Rose KL, Kingsley PJ, Rouzer CA, Shell SM, Sugitani N, Chazin WJ, Zagol-Ikapitte I, Boutaud O, Oates JA, Galligan JJ, Beavers WN, Marnett LJ. Protein modification by adenine propenal. Chem Res Toxicol 2014; 27:1732-42. [PMID: 25211669 PMCID: PMC4203390 DOI: 10.1021/tx500218g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Base propenals are products of the
reaction of DNA with oxidants
such as peroxynitrite and bleomycin. The most reactive base propenal,
adenine propenal, is mutagenic in Escherichia coli and reacts with DNA to form covalent adducts; however, the reaction
of adenine propenal with protein has not yet been investigated. A
survey of the reaction of adenine propenal with amino acids revealed
that lysine and cysteine form adducts, whereas histidine and arginine
do not. Nε-Oxopropenyllysine, a
lysine–lysine cross-link, and S-oxopropenyl
cysteine are the major products. Comprehensive profiling of the reaction
of adenine propenal with human serum albumin and the DNA repair protein,
XPA, revealed that the only stable adduct is Nε-oxopropenyllysine. The most reactive sites for modification
in human albumin are K190 and K351. Three sites of modification of
XPA are in the DNA-binding domain, and two sites are subject to regulatory
acetylation. Modification by adenine propenal dramatically reduces
XPA’s ability to bind to a DNA substrate.
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Affiliation(s)
- Sarah C Shuck
- A. B. Hancock Jr. Memorial Laboratory for Cancer Research, Departments of Biochemistry, ‡Chemistry, and §Pharmacology, ∥Mass Spectrometry Research Center, ⊥Center in Molecular Toxicology, #Center for Structural Biology, ∇Department of Medicine, Vanderbilt Institute of Chemical Biology, and Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine , Nashville, Tennessee 37232-0146, United States
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26
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Yu J, Deng P, Zhong D, Chen X. Identification of amino acid and glutathione N-conjugates of toosendanin: bioactivation of the furan ring mediated by CYP3A4. Chem Res Toxicol 2014; 27:1598-609. [PMID: 25105339 DOI: 10.1021/tx5002145] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Toosendanin (TSN) is a hepatotoxic triterpenoid extracted from Melia toosendan Sieb et Zucc. Considering that TSN contains the structural alert of the furan ring, it is believed that bioactivation of TSN may be responsible for its toxicity. Herein, the bioactivation potential and metabolism profiles of TSN were investigated. After an oral administration of 10 mg/kg TSN to rats, esterolysis and conjugation with amino acids were identified as the main metabolic pathways. The same types of conjugates were detected in liver microsomes in an NADPH-dependent manner. According to the remaining amount of the parent drug, the reactivity of trapping reagents with TSN reactive metabolites was sorted in a decreasing order of N(α)-(tert-butoxycarbonyl)-l-lysine (Boc-Lys) > alanine, lysine, taurine, phenylalanine, serine, glutamic acid, glycine, and glutathione (GSH) > cysteine. No conjugates were observed in NADPH and N-acetyl cysteine (NAC)-supplemented human liver microsomal incubations. Further phenotyping studies and the chemical synthesis of the major conjugated standards proved that TSN was bioactivated by CYP3A4 and yielded a cis-butene-1,4-dial intermediate, which was prone to undergo 1,2-addition with the amino group of amino acids and GSH to form 3-pyrroline-2-one adducts. The sulfydryl group of GSH also attacked the intermediate and yielded S-conjugates by 1,4- or 1,2-addition, which would form pyrrole conjugates by further reacting with the amino group. Compared to the well-recognized S-conjugation of the furan ring, N-conjugation with multiple amino acids and GSH played a more important part in the elimination of reactive metabolites of TSN. The significance of these conjugates requires further investigation.
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Affiliation(s)
- Jinghua Yu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences , 501 Haike Road, Shanghai 201203, P. R. China
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Hanzlik RP, Koen YM, Fang J. Bioinformatic analysis of 302 reactive metabolite target proteins. Which ones are important for cell death? Toxicol Sci 2013; 135:390-401. [PMID: 23897987 DOI: 10.1093/toxsci/kft166] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Many low molecular weight compounds undergo biotransformation to chemically reactive metabolites (CRMs) that covalently modify cellular proteins. However, the mechanisms by which this covalent binding leads to cytotoxicity are not understood. Prior analyses of lists of target proteins sorted by functional categories or hit frequency have not proven informative. In an attempt to move beyond covalent binding, we hypothesized that xenobiotic posttranslational modification of proteins might disrupt important protein-protein interactions (PPIs) and thereby direct cells from homeostasis into cell death pathways. To test this hypothesis, we analyzed a list of 302 proteins (66% rat, 26% mouse, 5% human) known to be targeted by 41 different cytotoxic CRMs. Human orthologs of rodent proteins were found by blast sequence alignment, and their interacting partners were found using the Human Protein Reference Database. The combined set of target orthologs and partners was sorted into KEGG pathways and Gene Ontology categories. Those most highly ranked based on sorting statistics and toxicological relevance were heavily involved with intracellular signaling pathways, protein folding, unfolded protein response, and regulation of apoptosis. Detailed examination revealed that many of the categories were flagged primarily by partner proteins rather than target proteins and that a majority of these partners interacted with just a small number of proteins in the CRM target set. A similar analysis performed without the partner proteins flagged very few categories as significant. These results support the hypothesis that disruption of important PPIs may be a major mechanism contributing to CRM-induced acute cytotoxicity.
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Abstract
Many xenobiotics containing a furan ring are toxic and/or carcinogenic. The harmful effects of these compounds require furan ring oxidation. This reaction generates an electrophilic intermediate. Depending on the furan ring substituents, the intermediate is either an epoxide or a cis-enedione with more ring substitution favoring epoxide formation. Either intermediate reacts with cellular nucleophiles such as protein or DNA to trigger toxicities. The reactivity of the metabolite determines which cellular nucleophiles are targeted. The toxicity of a particular furan is also influenced by the presence of competing metabolic pathways or efficient detoxification routes. GSH plays an important role in modulating the harmful effects of this class of compound by reacting with the reactive metabolite. However, this may not represent a detoxification step in all cases.
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Affiliation(s)
- Lisa A Peterson
- Division of Environmental Health Sciences, and Masonic Cancer Center, University of Minnesota , Minneapolis, Minnesota 55455, United States
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29
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Joven J, Rull A, Rodriguez-Gallego E, Camps J, Riera-Borrull M, Hernández-Aguilera A, Martin-Paredero V, Segura-Carretero A, Micol V, Alonso-Villaverde C, Menéndez J. Multifunctional targets of dietary polyphenols in disease: A case for the chemokine network and energy metabolism. Food Chem Toxicol 2013; 51:267-79. [DOI: 10.1016/j.fct.2012.10.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 09/26/2012] [Accepted: 10/03/2012] [Indexed: 12/26/2022]
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Khojasteh SC, Hartley DP, Ford KA, Uppal H, Oishi S, Nelson SD. Characterization of Rat Liver Proteins Adducted by Reactive Metabolites of Menthofuran. Chem Res Toxicol 2012; 25:2301-9. [DOI: 10.1021/tx300144d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- S. Cyrus Khojasteh
- Drug Metabolism
and Pharmacokinetics, Genentech, Inc.,
1 DNA Way MS 412a, South San Francisco,
California 94080, United States
| | | | - Kevin A. Ford
- Safety Assessment, Genentech, Inc., 1
DNA Way MS 59, South San Francisco,
California 94080, United States
| | - Hirdesh Uppal
- Safety Assessment, Genentech, Inc., 1
DNA Way MS 59, South San Francisco,
California 94080, United States
| | - Shimako Oishi
- Pharma Products Group, Abbott Japan Co., Ltd., Tokyo 108-6303, Japan
| | - Sidney D. Nelson
- Department of Medicinal Chemistry,
School of Pharmacy, University of Washington, Box 357610, Seattle, Washington 98195, United States
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31
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Shang Y, Mernaugh R, Zeng X. Characterization of the native and denatured herceptin by enzyme linked immunosorbent assay and quartz crystal microbalance using a high-affinity single chain fragment variable recombinant antibody. Anal Chem 2012; 84:8164-70. [PMID: 22934911 DOI: 10.1021/ac301235a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herceptin/Trastuzumab is a humanized IgG1κ light chain antibody used to treat some forms of breast cancer. A phage-displayed recombinant antibody library was used to obtain a single chain fragment variable (scFv, designated 2B4) to a linear synthetic peptide representing Herceptin's heavy chain CDR3. Enzyme linked immunosorbent assays (ELISAs) and piezoimmunosensor/quartz crystal microbalance (QCM) assays were used to characterize 2B4-binding activity to both native and heat denatured Herceptin. The 2B4 scFv specifically bound to heat denatured Herceptin in a concentration dependent manner over a wide (35-220.5 nM) dynamic range. Herceptin denatures and forms significant amounts of aggregates when heated. UV-vis characterization confirms that Herceptin forms aggregates as the temperature used to heat Herceptin increases. QCM affinity assay shows that binding stoichiometry between 2B4 scFv and Herceptin follows a 1:2 relationship proving that 2B4 scFv binds strongly to the dimers of heat denatured Herceptin aggregates and exhibits an affinity constant of 7.17 × 10(13) M(-2). The 2B4-based QCM assay was more sensitive than the corresponding ELISA. Combining QCM with ELISA can be used to more fully characterize nonspecific binding events in assays. The potential theoretical and clinical implications of these results and the advantages of the use of QCM to characterize human therapeutic antibodies in samples are also discussed.
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Affiliation(s)
- Yuqin Shang
- Chemistry Department, Oakland University, Rochester, Michigan 48309, USA
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Njuguna NM, Masimirembwa C, Chibale K. Identification and characterization of reactive metabolites in natural products-driven drug discovery. JOURNAL OF NATURAL PRODUCTS 2012; 75:507-513. [PMID: 22296642 DOI: 10.1021/np200786j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Toxicity of natural products arising from their metabolic biotransformation into reactive chemical intermediates is an important reason for high attrition rates in early drug discovery efforts. Screening promising natural products for their likelihood to form such metabolites is therefore an important step in identifying potential liabilities in the drug development process. However, such screening is complicated by the need to have test methods that are sensitive, reliable, accurate, efficient, and cost-effective enough to allow for routine identification and characterization of the reactive metabolites. These metabolites are typically formed in minute quantities, usually through minor metabolic pathways, and, due to their highly reactive and therefore transient chemical nature, pose considerable analytical challenges in attempts to determine their properties. Understanding the formation of reactive metabolites may be used as the basis for synthetic chemical modification of parent natural products aimed at bypassing such harmful bioactivation. This paper highlights the general principles and protocols commonly used to predict and study the formation of reactive metabolites in vitro and how the data obtained from such studies can be used in the development of safer drugs from natural products.
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Affiliation(s)
- Nicholas M Njuguna
- Department of Chemistry and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Rondebosch, 7701, South Africa
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Moro S, Chipman JK, Antczak P, Turan N, Dekant W, Falciani F, Mally A. Identification and Pathway Mapping of Furan Target Proteins Reveal Mitochondrial Energy Production and Redox Regulation as Critical Targets of Furan Toxicity. Toxicol Sci 2012; 126:336-52. [DOI: 10.1093/toxsci/kfs005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Lozama A, Cunningham CW, Caspers MJ, Douglas JT, Dersch CM, Rothman RB, Prisinzano TE. Opioid receptor probes derived from cycloaddition of the hallucinogen natural product salvinorin A. JOURNAL OF NATURAL PRODUCTS 2011; 74:718-726. [PMID: 21338114 PMCID: PMC3081938 DOI: 10.1021/np1007872] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
As part of our continuing efforts toward more fully understanding the structure-activity relationships of the neoclerodane diterpene salvinorin A, we report the synthesis and biological characterization of unique cycloadducts through [4+2] Diels-Alder cycloaddition. Microwave-assisted methods were developed and successfully employed, aiding in functionalizing the chemically sensitive salvinorin A scaffold. This demonstrates the first reported results for both cycloaddition of the furan ring and functionalization via microwave-assisted methodology of the salvinorin A skeleton. The cycloadducts yielded herein introduce electron-withdrawing substituents and bulky aromatic groups into the C-12 position. Kappa opioid (KOP) receptor space was explored through aromatization of the bent oxanorbornadiene system possessed by the cycloadducts to a planar phenyl ring system. Although dimethyl- and diethylcarboxylate analogues 5 and 6 retain some affinity and selectivity for KOP receptors and are full agonists, their aromatized counterparts 13 and 14 have reduced affinity for KOP receptors. The methods developed herein signify a novel approach toward rapidly probing the structure-activity relationships of furan-containing natural products.
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Affiliation(s)
| | | | | | | | | | | | - Thomas E. Prisinzano
- To whom correspondence should be addressed: Tel: (785) 864-3267. Fax: (785) 864-5326.
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Zhang S, Lu W, Liu X, Diao Y, Bai F, Wang L, Shan L, Huang J, Li H, Zhang W. Fast and effective identification of the bioactive compounds and their targets from medicinal plants via computational chemical biology approach. MEDCHEMCOMM 2011. [DOI: 10.1039/c0md00245c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Mally A, Graff C, Schmal O, Moro S, Hamberger C, Schauer UM, Brück J, Özden S, Sieber M, Steger U, Schrenk D, Hard GC, Chipman JK, Dekant W. Functional and proliferative effects of repeated low-dose oral administration of furan in rat liver. Mol Nutr Food Res 2010; 54:1556-67. [DOI: 10.1002/mnfr.201000064] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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37
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Park BK, Laverty H, Srivastava A, Antoine DJ, Naisbitt D, Williams DP. Drug bioactivation and protein adduct formation in the pathogenesis of drug-induced toxicity. Chem Biol Interact 2010; 192:30-6. [PMID: 20846520 DOI: 10.1016/j.cbi.2010.09.011] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Revised: 09/06/2010] [Accepted: 09/07/2010] [Indexed: 02/06/2023]
Abstract
Adverse drug reactions (ADRs) remain a major complication of drug therapy and can be classified as 'on-target' or 'off-target' (idiosyncratic) reactions. On-target reactions can be predicted from the known primary or secondary pharmacology of the drug and often represent an exaggeration of the pharmacological effect of the drug. In contrast, off-target adverse reactions cannot be predicted from knowledge of the basic pharmacology of the drug. The exact mechanisms of idiosyncratic drug reactions are still unclear; however it is believed that they can be initiated by chemically reactive drug metabolites. It is well known that xenobiotics can undergo metabolic bioactivation reactions which have the potential to cause cellular stress and damage. Bioactivation of drugs is thought to have the potential of initiating covalent linkages between cellular protein and drugs which can be recognised by the adaptive immune system in the absence of detectable cellular stress. This process cannot yet be predicted in pre-clinical models or discovered in clinical trials. Because of this hazard perception, the formation of chemically reactive metabolites in early drug discovery remains a serious impediment to the development of new medicines and can lead to withdrawal of an otherwise effective therapeutic agent. The fear of such reactions occurring at the post-licensing stage - when such problems first become evident - is a major contribution to drug attrition. The first step towards such methodology has been the development of chemically reactive metabolite screens. The chemical basis of drug bioactivation can usually be rationalised and synthetic strategies put in place to prevent such bioactivation. However, there is no simple correlation between drug bioactivation in vitro and adverse drug reactions in the clinic. Such a chemical approach is clearly limited by the facts that (a) not all drugs that can undergo bioactivation by human drug-metabolising enzymes are associated with hypersensitivity in the clinic and (b) drug bioactivation may not always be a mandatory step in drug hypersensitivity. To predict such reactions in early drug development, it will require an integrated understanding of the chemical, immunological and genetic basis of adverse drug reactions in patients, which in turn will depend on the development of novel in vitro experimental systems.
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Affiliation(s)
- B K Park
- MRC Centre for Drug Safety Science, Institute of Translational Medicine, Department of Molecular and Clinical Pharmacology, University of Liverpool, Sherrington Buildings, Ashton Street, Liverpool L69 3GE, UK.
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38
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Ricci A, Piccolella S, Fiorentino A, Pepi F, D'Abrosca B, Monaco P. A tandem mass spectrometric investigation of the low-energy collision-activated fragmentation of neo-clerodane diterpenes. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2010; 24:1543-1556. [PMID: 20486250 DOI: 10.1002/rcm.4545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Mass spectrometric fragmentation data of neo-clerodane diterpenes are almost inexistent but they can prove helpful for the qualitative and quantitative analysis of these compounds as well as for the identification of unknown compounds belonging to this class of plant secondary metabolites. [M-H](-) ions of nine neo-clerodane diterpenes (1-9), recently isolated from Teucrium chamaedrys, were generated by electrospray ionization and were fragmented in the collision cell of a Triple Quadrupole (TQ) and of a Quadrupole Ion Trap (QIT) mass spectrometer. The deprotonated neo-clerodane glucosides, chamaedryoside A and B (1, 2), readily lost the sugar residue to give, as their main fragmentation channel, the neo-clerodane ions, I and II, which were structurally characterized by TQ and QIT MS. The collision-activated dissociation (CAD) mass spectra of I and II and of deprotonated neo-clerodanes 3-9 allowed us to reach some general conclusions on the fragmentation pathways of this class of compounds. For example, teuflin and its OH derivatives, teucrin A, teuflidin and 6-beta-hydroxyteucridin, showed a characteristic fragmentation pattern involving the loss of 94 Da and 124 Da from the lactone moiety, whereas a loss of 44 Da was observed for teucrin E, and of 58 Da for teucrin F and G. In addition, several compound-specific fragmentations were observed and can be proposed for the identification of individual compounds. The systematic approach allowed us to hypothesize the mechanisms of the most important collision-activated dissociation/isomerization channels.
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Affiliation(s)
- Andreina Ricci
- Dipartimento di Scienze della Vita, Seconda Università di Napoli, via Vivaldi, 43 81100 Caserta, Italy.
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39
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Gómez-Lechón MJ, Castell JV, Donato MT. The use of hepatocytes to investigate drug toxicity. Methods Mol Biol 2010; 640:389-415. [PMID: 20645064 DOI: 10.1007/978-1-60761-688-7_21] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The liver is very active in metabolizing foreign compounds and the major target for toxicity caused by drugs. Hepatotoxicity may be the result of the drug itself or, more frequently, a result of the bioactivation process and the production of reactive metabolites. Prioritization of compounds based on human hepatotoxicity potential is currently a key unmet need in drug discovery, as it can become a major problem for several lead compounds in later stages of the drug discovery pipeline. Therefore, evaluation of potential hepatotoxicity represents a critical step in the development of new drugs. Cultured hepatocytes are increasingly used by the pharmaceutical industry for the screening of hepatotoxic potential of new molecules. Hepatocytes in culture retain hepatic key functions and constitute a valuable tool to identify chemically induced cellular damage. Their use has notably contributed to the understanding of mechanisms responsible for hepatotoxicity (disruption of cellular energy status, alteration of Ca(2+) homeostasis, inhibition of transport systems, metabolic activation, oxidative stress, covalent binding, etc.). Assessment of current cytotoxicity and hepatic-specific biochemical effects is limited by the inability to measure a wide spectrum of potential mechanistic changes involved in the drug-induced toxic injury. A convenient selection of endpoints allows a multiparametric evaluation of drug toxicity. In this regard, cytomic, proteomic, toxicogenomic and metabonomic approaches help to define patterns of hepatotoxicity for early identification of potential adverse effects of the drug to the liver.
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Affiliation(s)
- María José Gómez-Lechón
- Unidad de Hepatología Experimental, Centro de Investigación, Hospital La Fe, Valencia, Spain
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40
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Cheng KW, Wong CC, Wang M, He QY, Chen F. Identification and characterization of molecular targets of natural products by mass spectrometry. MASS SPECTROMETRY REVIEWS 2010; 29:126-155. [PMID: 19319922 DOI: 10.1002/mas.20235] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Natural products, and their derivatives and mimics, have contributed to the development of important therapeutics to combat diseases such as infections and cancers over the past decades. The value of natural products to modern drug discovery is still considerable. However, its development is hampered by a lack of a mechanistic understanding of their molecular action, as opposed to the emerging molecule-targeted therapeutics that are tailored to a specific protein target(s). Recent advances in the mass spectrometry-based proteomic approaches have the potential to offer unprecedented insights into the molecular action of natural products. Chemical proteomics is established as an invaluable tool for the identification of protein targets of natural products. Small-molecule affinity selection combined with mass spectrometry is a successful strategy to "fish" cellular targets from the entire proteome. Mass spectrometry-based profiling of protein expression is also routinely employed to elucidate molecular pathways involved in the therapeutic and possible toxicological responses upon treatment with natural products. In addition, mass spectrometry is increasingly utilized to probe structural aspects of natural products-protein interactions. Limited proteolysis, photoaffinity labeling, and hydrogen/deuterium exchange in conjunction with mass spectrometry are sensitive and high-throughput strategies that provide low-resolution structural information of non-covalent natural product-protein complexes. In this review, we provide an overview on the applications of mass spectrometry-based techniques in the identification and characterization of natural product-protein interactions, and we describe how these applications might revolutionize natural product-based drug discovery.
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Affiliation(s)
- Ka-Wing Cheng
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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41
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Abstract
Drugs are generally converted to biologically inactive forms and eliminated from the body, principally by hepatic metabolism. However, certain drugs undergo biotransformation to metabolites that can interfere with cellular functions through their intrinsic chemical reactivity towards glutathione, leading to thiol depletion, and functionally critical macromolecules, resulting in reversible modification, irreversible adduct formation, and irreversible loss of activity. There is now a great deal of evidence which shows that reactive metabolites are formed from drugs known to cause hepatotoxicity, such as acetaminophen, tamoxifen, isoniazid, and amodiaquine. The main theme of this article is to review the evidence for chemically reactive metabolites being initiating factors for the multiple downstream biological events culminating in toxicity. The major objectives are to understand those idiosyncratic hepatotoxicities thought to be caused by chemically reactive metabolites and to define the role of toxic metabolites.
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Wang Y, Azuma Y, Friedman DB, Coffey RJ, Neufeld KL. Novel association of APC with intermediate filaments identified using a new versatile APC antibody. BMC Cell Biol 2009; 10:75. [PMID: 19845967 PMCID: PMC2774295 DOI: 10.1186/1471-2121-10-75] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Accepted: 10/21/2009] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND As a key player in suppression of colon tumorigenesis, Adenomatous Polyposis Coli (APC) has been widely studied to determine its cellular functions. However, inconsistencies of commercially available APC antibodies have limited the exploration of APC function. APC is implicated in spindle formation by direct interactions with tubulin and microtubule-binding protein EB1. APC also interacts with the actin cytoskeleton to regulate cell polarity. Until now, interaction of APC with the third cytoskeletal element, intermediate filaments, has remained unexamined. RESULTS We generated an APC antibody (APC-M2 pAb) raised against the 15 amino acid repeat region, and verified its reliability in applications including immunoprecipitation, immunoblotting, and immunofluorescence in cultured cells and tissue. Utilizing this APC-M2 pAb, we immunoprecipitated endogenous APC and its binding proteins from colon epithelial cells expressing wild-type APC. Using Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS), we identified 42 proteins in complex with APC, including beta-catenin and intermediate filament (IF) proteins lamin B1 and keratin 81. Association of lamin B1 with APC in cultured cells and human colonic tissue was verified by co-immunoprecipitation and colocalization. APC also colocalized with keratins and remained associated with IF proteins throughout a sequential extraction procedure. CONCLUSION We introduce a versatile APC antibody that is useful for cell/tissue immunostaining, immunoblotting and immunoprecipitation. We also present evidence for interactions between APC and IFs, independent of actin filaments and microtubules. Our results suggest that APC associates with all three major components of the cytoskeleton, thus expanding potential roles for APC in the regulation of cytoskeletal integrity.
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Affiliation(s)
- Yang Wang
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, USA
| | - Yoshiaki Azuma
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, USA
| | - David B Friedman
- Mass Spectrometry Research Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Robert J Coffey
- Departments of Cell and Developmental Biology and Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kristi L Neufeld
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, USA
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43
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Simpson DS, Lovell KM, Lozama A, Han N, Day VW, Dersch CM, Rothman RB, Prisinzano TE. Synthetic studies of neoclerodane diterpenes from Salvia divinorum: role of the furan in affinity for opioid receptors. Org Biomol Chem 2009; 7:3748-56. [PMID: 19707679 DOI: 10.1039/b905148a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Further synthetic modification of the furan ring of salvinorin A (1), the major active component of Salvia divinorum, has resulted in novel neoclerodane diterpenes with opioid receptor affinity and activity. A computational study has predicted 1 to be a reproductive toxicant in mammals and is suggestive that use of 1 may be associated with adverse effects. We report in this study that piperidine 21 and thiomorpholine 23 have been identified as selective partial agonists at kappa opioid receptors. This indicates that additional structural modifications of 1 may provide ligands with good selectivity for opioid receptors but with reduced potential for toxicity.
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Affiliation(s)
- Denise S Simpson
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS 66045-7582, USA
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44
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Fang J, Koen YM, Hanzlik RP. Bioinformatic analysis of xenobiotic reactive metabolite target proteins and their interacting partners. BMC CHEMICAL BIOLOGY 2009; 9:5. [PMID: 19523227 PMCID: PMC2711050 DOI: 10.1186/1472-6769-9-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Accepted: 06/12/2009] [Indexed: 12/12/2022]
Abstract
BACKGROUND Protein covalent binding by reactive metabolites of drugs, chemicals and natural products can lead to acute cytotoxicity. Recent rapid progress in reactive metabolite target protein identification has shown that adduction is surprisingly selective and inspired the hope that analysis of target proteins might reveal protein factors that differentiate target- vs. non-target proteins and illuminate mechanisms connecting covalent binding to cytotoxicity. RESULTS Sorting 171 known reactive metabolite target proteins revealed a number of GO categories and KEGG pathways to be significantly enriched in targets, but in most cases the classes were too large, and the "percent coverage" too small, to allow meaningful conclusions about mechanisms of toxicity. However, a similar analysis of the directlyinteracting partners of 28 common targets of multiple reactive metabolites revealed highly significant enrichments in terms likely to be highly relevant to cytotoxicity (e.g., MAP kinase pathways, apoptosis, response to unfolded protein). Machine learning was used to rank the contribution of 211 computed protein features to determining protein susceptibility to adduction. Protein lysine (but not cysteine) content and protein instability index (i.e., rate of turnover in vivo) were among the features most important to determining susceptibility. CONCLUSION As yet there is no good explanation for why some low-abundance proteins become heavily adducted while some abundant proteins become only lightly adducted in vivo. Analyzing the directly interacting partners of target proteins appears to yield greater insight into mechanisms of toxicity than analyzing target proteins per se. The insights provided can readily be formulated as hypotheses to test in future experimental studies.
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Affiliation(s)
- Jianwen Fang
- Applied Bioinformatics Laboratory, University of Kansas, Lawrence, KS 66045, USA
| | - Yakov M Koen
- Department of Medicinal Chemistry, University of Kansas, Lawrence, KS 66045, USA
| | - Robert P Hanzlik
- Department of Medicinal Chemistry, University of Kansas, Lawrence, KS 66045, USA
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45
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Prisinzano TE. Natural products as tools for neuroscience: discovery and development of novel agents to treat drug abuse. JOURNAL OF NATURAL PRODUCTS 2009; 72:581-7. [PMID: 19099466 PMCID: PMC2788013 DOI: 10.1021/np8005748] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Much of what we know about the neurosciences is the direct result of studying psychoactive natural products. Unfortunately, there are many gaps in our understanding of the basic biological processes that contribute to the etiology of many CNS disorders. The investigation of psychoactive natural products offers an excellent approach to identify novel agents to treat CNS disorders and to find new chemical tools to better elucidate their biological mechanisms. This review will detail recent progress in a program directed toward investigating psychoactive natural products with the goal of treating drug abuse by targeting kappa opioid receptors.
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Affiliation(s)
- Thomas E Prisinzano
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, USA.
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Labenski MT, Fisher AA, Lo HH, Monks TJ, Lau SS. Protein electrophile-binding motifs: lysine-rich proteins are preferential targets of quinones. Drug Metab Dispos 2009; 37:1211-8. [PMID: 19251821 DOI: 10.1124/dmd.108.026211] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Quinones represent an important class of endogenous compounds such as neurotransmitters and coenzyme Q10, electrophilic xenobiotics, and environmental toxicants that have known reactivity based on their ability to redox cycle and generate oxidative stress, as well as to alkylate target proteins. It is likely that topological, chemical, and physical features combine to determine which proteins become targets for chemical adduction. Chemical-induced post-translational modification of certain critical proteins causes a change in structure/function that contributes to the toxicological response to chemical exposure. In this study, we have identified a number of proteins that are modified by quinone-thioethers after administration of 2-(glutathion-S-yl)HQ. Parallel one-dimensional gel electrophoresis was performed, and the Coomassie-stained gel was aligned with the corresponding Western blot, which was probed for adductions. Immunopositive bands were then subjected to trypsin digestion and analyzed via liquid chromatography/tandem mass spectrometry. The proteins that were subsequently identified contained a higher than average (9.7 versus 5.5%) lysine content and numerous stretches of lysine run-ons, which is a presumed electrophile binding motif. Approximately 50% of these proteins have also been identified as targets for electrophilic adduction by a diverse group of chemicals by other investigators, implying overlapping electrophile adductomes. By identifying a motif targeted by electrophiles it becomes possible to make predictions of proteins that may be targeted for adduction and possible sites on these proteins that are adducted. An understanding of proteins targeted for adduction is essential to unraveling the toxicity produced by these electrophiles.
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Affiliation(s)
- Matthew T Labenski
- Southwest Environmental Health Sciences Center, Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona Health Sciences Center, Tucson, AZ, USA
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47
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Current world literature. Ageing: biology and nutrition. Curr Opin Clin Nutr Metab Care 2009; 12:95-100. [PMID: 19057195 DOI: 10.1097/mco.0b013e32831fd97a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hanzlik RP, Fang J, Koen YM. Filling and mining the reactive metabolite target protein database. Chem Biol Interact 2008; 179:38-44. [PMID: 18823962 DOI: 10.1016/j.cbi.2008.08.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2008] [Revised: 08/22/2008] [Accepted: 08/26/2008] [Indexed: 12/13/2022]
Abstract
The post-translational modification of proteins is a well-known endogenous mechanism for regulating protein function and activity. Cellular proteins are also susceptible to post-translational modification by xenobiotic agents that possess, or whose metabolites possess, significant electrophilic character. Such non-physiological modifications to endogenous proteins are sometimes benign, but in other cases they are strongly associated with, and are presumed to cause, lethal cytotoxic consequences via necrosis and/or apoptosis. The Reactive Metabolite Target Protein Database (TPDB) is a searchable, freely web-accessible (http://tpdb.medchem.ku.edu:8080/protein_database/) resource that attempts to provide a comprehensive, up-to-date listing of known reactive metabolite target proteins. In this report we characterize the TPDB by reviewing briefly how the information it contains came to be known. We also compare its information to that provided by other types of "-omics" studies relevant to toxicology, and we illustrate how bioinformatic analysis of target proteins may help to elucidate mechanisms of cytotoxic responses to reactive metabolites.
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Affiliation(s)
- Robert P Hanzlik
- Department of Medicinal Chemistry and Bioinformatics Core Facility, University of Kansas, Lawrence, 66045-7582, USA.
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Ikehata K, Duzhak TG, Galeva NA, Ji T, Koen YM, Hanzlik RP. Protein targets of reactive metabolites of thiobenzamide in rat liver in vivo. Chem Res Toxicol 2008; 21:1432-42. [PMID: 18547066 PMCID: PMC2493440 DOI: 10.1021/tx800093k] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Thiobenzamide (TB) is a potent hepatotoxin in rats, causing dose-dependent hyperbilirubinemia, steatosis, and centrolobular necrosis. These effects arise subsequent to and appear to result from the covalent binding of the iminosulfinic acid metabolite of TB to cellular proteins and phosphatidylethanolamine lipids [ Ji et al. ( 2007) Chem. Res. Toxicol. 20, 701- 708 ]. To better understand the relationship between the protein covalent binding and the toxicity of TB, we investigated the chemistry of the adduction process and the identity of the target proteins. Cytosolic and microsomal proteins isolated from the livers of rats treated with a hepatotoxic dose of [ carboxyl- (14)C]TB contained high levels of covalently bound radioactivity (25.6 and 36.8 nmol equiv/mg protein, respectively). These proteins were fractionated by two-dimensional gel electrophoresis, and radioactive spots (154 cytosolic and 118 microsomal) were located by phosphorimaging. Corresponding spots from animals treated with a 1:1 mixture of TB and TB- d 5 were similarly separated, the spots were excised, and the proteins were digested in gel with trypsin. Peptide mass mapping identified 42 cytosolic and 24 microsomal proteins, many of which appeared in more than one spot on the gel; however, only a few spots contained more than one identifiable protein. Eighty-six peptides carrying either a benzoyl or a benzimidoyl adduct on a lysine side chain were clearly recognized by their d 0/ d 5 isotopic signature (sometimes both in the same digest). Because model studies showed that benzoyl adducts do not arise by hydrolysis of benzimidoyl adducts, it was proposed that TB undergoes S-oxidation twice to form iminosulfinic acid 4 [PhC(NH)SO 2H], which either benzimidoylates a lysine side chain or undergoes hydrolysis to 9 [PhC(O)SO 2H] and then benzoylates a lysine side chain. The proteins modified by TB metabolites serve a range of biological functions and form a set that overlaps partly with the sets of proteins known to be modified by several other metabolically activated hepatotoxins. The relationship of the adduction of these target proteins to the cytotoxicity of reactive metabolites is discussed in terms of three currently popular mechanisms of toxicity: inhibition of enzymes important to the maintenance of cellular energy and homeostasis, the unfolded protein response, and interference with kinase-based signaling pathways that affect cell survival.
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Affiliation(s)
- Keisuke Ikehata
- Department of Medicinal Chemistry University of Kansas, Lawrence, KS 66045
| | - Tatyana G. Duzhak
- Department of Medicinal Chemistry University of Kansas, Lawrence, KS 66045
| | | | - Tao Ji
- Department of Medicinal Chemistry University of Kansas, Lawrence, KS 66045
| | - Yakov M. Koen
- Department of Medicinal Chemistry University of Kansas, Lawrence, KS 66045
| | - Robert P. Hanzlik
- Department of Medicinal Chemistry University of Kansas, Lawrence, KS 66045
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50
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Carol-Visser J, van der Schans M, Fidder A, Hulst AG, van Baar BLM, Irth H, Noort D. Development of an automated on-line pepsin digestion-liquid chromatography-tandem mass spectrometry configuration for the rapid analysis of protein adducts of chemical warfare agents. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 870:91-7. [PMID: 18573700 DOI: 10.1016/j.jchromb.2008.06.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 05/29/2008] [Accepted: 06/04/2008] [Indexed: 01/21/2023]
Abstract
Rapid monitoring and retrospective verification are key issues in protection against and non-proliferation of chemical warfare agents (CWA). Such monitoring and verification are adequately accomplished by the analysis of persistent protein adducts of these agents. Liquid chromatography-mass spectrometry (LC-MS) is the tool of choice in the analysis of such protein adducts, but the overall experimental procedure is quite elaborate. Therefore, an automated on-line pepsin digestion-LC-MS configuration has been developed for the rapid determination of CWA protein adducts. The utility of this configuration is demonstrated by the analysis of specific adducts of sarin and sulfur mustard to human butyryl cholinesterase and human serum albumin, respectively.
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Affiliation(s)
- Jeroen Carol-Visser
- Department of Analytical Chemistry and Applied Spectroscopy, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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