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Chai Z, Wu Q, Cheng K, Liu X, Jiang L, Liu M, Li C. Simultaneous detection of small molecule thiols with a simple 19F NMR platform. Chem Sci 2020; 12:1095-1100. [PMID: 34163876 PMCID: PMC8179020 DOI: 10.1039/d0sc04664g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Thiols play critical roles in regulating biological functions and have wide applications in pharmaceutical and biomedical industries. However, we still lack a general approach for the simultaneous detection of various thiols, especially in complex systems. Herein, we establish a 19F NMR platform where thiols are selectively fused into a novelly designed fluorinated receptor that has two sets of environmentally different 19F atoms with fast kinetics (k 2 = 0.73 mM-1 min-1), allowing us to generate unique two-dimensional codes for about 20 thiols. We demonstrate the feasibility of the approach by reliably quantifying thiol drug content in tablets, discriminating thiols in living cells, and for the first time monitoring the thiol related metabolism pathway at the atomic level. Moreover, the method can be easily extended to detect the activity of thiol related enzymes such as γ-glutamyl transpeptidase. We envision that the versatile platform will be a useful tool for detecting thiols and elucidating thiol-related processes in complex systems.
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Affiliation(s)
- Zhaofei Chai
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences Wuhan 430071 China
| | - Qiong Wu
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences Wuhan 430071 China .,Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Kai Cheng
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences Wuhan 430071 China
| | - Xiaoli Liu
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences Wuhan 430071 China
| | - Ling Jiang
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences Wuhan 430071 China .,Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Maili Liu
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences Wuhan 430071 China .,Graduate University of Chinese Academy of Sciences Beijing 100049 China
| | - Conggang Li
- Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan National Laboratory for Optoelectronics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences Wuhan 430071 China .,Graduate University of Chinese Academy of Sciences Beijing 100049 China
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Zhang Y, Zhang G, Yang P, Moosa B, Khashab NM. Self-Immolative Fluorescent and Raman Probe for Real-Time Imaging and Quantification of γ-Glutamyl Transpeptidase in Living Cells. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27529-27535. [PMID: 31290645 DOI: 10.1021/acsami.9b07186] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Characterizing over-expressed enzymes or biomarkers in living cells is critical for the molecular understanding of disease pathology and consequently for designing precision medicines. Herein, a "switch-on" probe is designed to selectively detect γ-glutamyl transpeptidase (GGT) in living cells via a unique ensemble of enhanced fluorescence and surface-enhanced Raman scattering (SERS). In the presence of GGT, the γ-glutamyl bond in the probe molecule is cleaved, thereby activating a fluorescent probe molecule as well as a Raman reporter molecule. Consequently, the detection of GGT is achieved based on both plasmonic fluorescent enhancement and SERS with a detection limit as low as 1.2 × 10-3 U/L (normal range for GGT levels in the blood is 9-48 U/L). The main advantage of this platform is that on the occasion of fluorescence signal interference, especially in the presence of free metal ions in cells, the SERS signals still hold high stability as a backup. This work highlights the benefits of the marriage of two complimentary sensing techniques into one platform that can overcome the major obstacles of detection of real-time biomarkers and imaging in living cells.
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Affiliation(s)
- Yang Zhang
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Gengwu Zhang
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Peng Yang
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Basem Moosa
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
| | - Niveen M Khashab
- Smart Hybrid Materials Laboratory (SHMs), Advanced Membranes and Porous Materials Center , King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900 , Saudi Arabia
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Luo S, Chen G, Truica CI, Baird CC, Xia Z, Lazarus P. Identification and Quantification of Novel Major Metabolites of the Steroidal Aromatase Inhibitor, Exemestane. Drug Metab Dispos 2018; 46:1867-1878. [PMID: 30257855 PMCID: PMC7333658 DOI: 10.1124/dmd.118.081166] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 09/14/2018] [Indexed: 01/03/2023] Open
Abstract
Exemestane (EXE) is an aromatase inhibitor used for the prevention and treatment of estrogen receptor–positive breast cancer. Although the known major metabolic pathway for EXE is reduction to form the active 17β-dihydro-EXE (17β-DHE) and subsequent glucuronidation to 17β-hydroxy-EXE-17-O-β-D-glucuronide (17β-DHE-Gluc), previous studies have suggested that other major metabolites exist for exemestane. In the present study, a liquid chromatography–mass spectrometry (LC-MS) approach was used to acquire accurate mass data in MSE mode, in which precursor ion and fragment ion data were obtained simultaneously to screen novel phase II EXE metabolites in urine specimens from women taking EXE. Two major metabolites predicted to be cysteine conjugates of EXE and 17β-DHE by elemental composition were identified. The structures of the two metabolites were confirmed to be 6-methylcysteinylandrosta-1,4-diene-3,17-dione (6-EXE-cys) and 6-methylcysteinylandrosta-1,4-diene-17β-hydroxy-3-one (6-17β-DHE-cys) after comparison with their chemically synthesized counterparts. Both underwent biosynthesis in vitro in three stepwise enzymatic reactions, with the first involving glutathione conjugation. The cysteine conjugates of EXE and 17β-DHE were subsequently quantified by liquid chromatography–mass spectrometry in the urine and matched plasma samples of 132 subjects taking EXE. The combined 6-EXE-cys plus 6-17β-DHE-cys made up 77% of total EXE metabolites in urine (vs. 1.7%, 0.14%, and 21% for EXE, 17β-DHE, and 17β-DHE-Gluc, respectively) and 35% in plasma (vs. 17%, 12%, and 36% for EXE, 17β-DHE, and 17β-DHE-Gluc, respectively). Therefore, cysteine conjugates of EXE and 17β-DHE appear to be major metabolites of EXE in both urine and plasma.
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Affiliation(s)
- Shaman Luo
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington (S.L., G.C., Z.X., P.L.); Department of Medicine, Penn State University College of Medicine, Hershey, Pennsylvania (C.I.T., C.C.B.); and Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, Heilongjiang, China (S.L.)
| | - Gang Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington (S.L., G.C., Z.X., P.L.); Department of Medicine, Penn State University College of Medicine, Hershey, Pennsylvania (C.I.T., C.C.B.); and Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, Heilongjiang, China (S.L.)
| | - Cristina I Truica
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington (S.L., G.C., Z.X., P.L.); Department of Medicine, Penn State University College of Medicine, Hershey, Pennsylvania (C.I.T., C.C.B.); and Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, Heilongjiang, China (S.L.)
| | - Cynthia C Baird
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington (S.L., G.C., Z.X., P.L.); Department of Medicine, Penn State University College of Medicine, Hershey, Pennsylvania (C.I.T., C.C.B.); and Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, Heilongjiang, China (S.L.)
| | - Zuping Xia
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington (S.L., G.C., Z.X., P.L.); Department of Medicine, Penn State University College of Medicine, Hershey, Pennsylvania (C.I.T., C.C.B.); and Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, Heilongjiang, China (S.L.)
| | - Philip Lazarus
- Department of Pharmaceutical Sciences, College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington (S.L., G.C., Z.X., P.L.); Department of Medicine, Penn State University College of Medicine, Hershey, Pennsylvania (C.I.T., C.C.B.); and Alkali Soil Natural Environmental Science Center, Northeast Forestry University, Harbin, Heilongjiang, China (S.L.)
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Inoue K, Fukuda K, Yoshimura T, Kusano K. Comparison of the Reactivity of Trapping Reagents toward Electrophiles: Cysteine Derivatives Can Be Bifunctional Trapping Reagents. Chem Res Toxicol 2015; 28:1546-55. [PMID: 26172216 DOI: 10.1021/acs.chemrestox.5b00129] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Trapping reagents are powerful tools to detect unstable reactive metabolites. There are a variety of trapping reagents based on chemical reactivity to electrophiles, and we investigated the reactivity of thiol and amine trapping reagents to metabolically generated electrophiles and commercially available electrophilic compounds. Glutathione (GSH) and N-acetylcysteine (Nac) trapped soft electrophiles, and amine derivatives such as semicarbazide (SC) and methoxyamine (MeA) reacted as hard nucleophiles to trap aldehydes as imine derivatives. Cysteine (Cys) and homocysteine (HCys) captured both soft electrophiles and hard electrophilic aldehydes. There were no qualitative differences in trapping soft electrophiles among Cys, HCys, GSH, and Nac, although quantitative reactivity to trap soft electrophiles varied likely depending on the pKa values of their thiol group. In the reactivity with aldehydes, Cys and HCys showed relatively lower reactivity as compared with SC and MeA. Nonetheless, they can trap aldehydes, and the resulting conjugates were stable and detected easily because their amino group formed imines after reaction with aldehydes, which are successively attacked by the intramolecular thiol group to form stable ring structures. This report demonstrated that Cys and HCys are advantageous to evaluate the formations of both soft electrophiles and aldehyde-type derivatives from a lot of drug candidates at early drug discovery by their unique structural characteristics.
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Affiliation(s)
- Kazuko Inoue
- Drug Metabolism and Pharmacokinetics Japan, Eisai Product Creation Systems, Eisai Co., Ltd., Tsukuba, Japan
| | - Katsuyuki Fukuda
- Drug Metabolism and Pharmacokinetics Japan, Eisai Product Creation Systems, Eisai Co., Ltd., Tsukuba, Japan
| | - Tsutomu Yoshimura
- Drug Metabolism and Pharmacokinetics Japan, Eisai Product Creation Systems, Eisai Co., Ltd., Tsukuba, Japan
| | - Kazutomi Kusano
- Drug Metabolism and Pharmacokinetics Japan, Eisai Product Creation Systems, Eisai Co., Ltd., Tsukuba, Japan
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Grillo MP. Detecting reactive drug metabolites for reducing the potential for drug toxicity. Expert Opin Drug Metab Toxicol 2015; 11:1281-302. [PMID: 26005795 DOI: 10.1517/17425255.2015.1048222] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
INTRODUCTION A number of withdrawn drugs are known to undergo bioactivation by a range of drug metabolizing enzymes to chemically reactive metabolites that bind covalently to protein and DNA resulting in organ toxicity and carcinogenesis, respectively. An important goal in drug discovery is to identify structural sites of bioactivation within discovery molecules for providing strategic modifications that eliminate or minimize reactive metabolite formation, while maintaining target potency, selectivity and desired pharmacokinetic properties leading to the development of efficacious and nontoxic drugs. AREAS COVERED This review covers experimental techniques currently used to detect reactive drug metabolites and provides recent examples where information from mechanistic in vitro studies was successfully used to redesign candidate drugs leading to blocked or minimized bioactivation. Reviewed techniques include in vitro radiolabeled drug covalent binding to protein and reactive metabolite trapping with reagents such as glutathione, cyanide, semicarbazide and DNA bases. Case studies regarding reactive metabolite detection using a combination of varied techniques, including liquid chromatography-tandem mass spectrometry and NMR analyses and subsequent structural modification are discussed. EXPERT OPINION Information derived from state-of-art mechanistic drug metabolism studies can be used successfully to direct medicinal chemistry towards the synthesis of candidate drugs devoid of bioactivation liabilities, while maintaining desired pharmacology and pharmacokinetic properties.
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Affiliation(s)
- Mark P Grillo
- MyoKardia , 333 Allerton Ave, South San Francisco, CA 94080 , USA
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Grillo MP, Lohr MT, Khera S. Interaction ofγ-Glutamyltranspeptidase with Ibuprofen-S-Acyl-Glutathione In Vitro and In Vivo in Human. Drug Metab Dispos 2012; 41:111-21. [DOI: 10.1124/dmd.112.048645] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Inoue K, Asai N, Mizuo H, Fukuda K, Kusano K, Yoshimura T. Unique metabolic pathway of [(14)C]lenvatinib after oral administration to male cynomolgus monkey. Drug Metab Dispos 2011; 40:662-70. [PMID: 22207053 DOI: 10.1124/dmd.111.043281] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Lenvatinib, a potent inhibitor of multiple tyrosine kinases, including vascular endothelial growth factor receptors 2 and 3, generated unique metabolites after oral administration of [(14)C]lenvatinib (30 mg/kg) to a male cynomolgus monkey. Lenvatinib was found to be transformed to a GSH conjugate, through displacement of an O-aryl moiety, at the quinoline part of the molecule in the liver and kidneys. The GSH conjugate underwent further hydrolysis by γ-glutamyltranspeptidase and dipeptidases, followed by intramolecular rearrangement, to form N-cysteinyl quinoline derivatives, which were dimerized to form disulfide dimers and also formed an N,S-cysteinyl diquinoline derivative. In urine, a thioacetic acid conjugate of the quinoline was also observed as one of the major metabolites of lenvatinib. Lenvatinib is a 4-O-aryl quinoline derivative, and such compounds have been known to undergo conjugation with GSH, accompanied by release of the O-aryl moiety. Because of intramolecular rearrangement in the case of lenvatinib, hydrolysis of the GSH conjugate yielded N-cysteinylglycine and N-cysteine conjugates instead of the corresponding S-conjugates. Because the N-substituted derivatives possess free sulfhydryl groups, dimerization through disulfide bonds and another nucleophilic substitution reaction with lenvatinib resulted in the formation of disulfanyl dimers and an N,S-cysteinyl diquinoline derivative, respectively. Characteristic product ions at m/z 235 and m/z 244, which were associated with thioquinoline and N-ethylquinoline derivatives, respectively, were used to differentiate S- and N-derivatives in this study. On the basis of accurate mass and NMR measurements, a unique metabolic pathway for lenvatinib in monkey and the proposed formation mechanism have been elucidated.
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Affiliation(s)
- Kazuko Inoue
- Drug Metabolism and Pharmacokinetics Japan, Eisai Product Creation Systems, Eisai Co., 5-1-3, Tokodai, Tsukuba, Ibaraki, 300-2635, Japan.
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Abstract
BACKGROUND Given the number of publications appearing annually regarding drug-induced liver injury (DILI), there remains a need to concisely summarize each year's new crop of case series and reports as well as the advances in mechanisms of liver injury and in the field of pharmacogenomics relating to DILI. OBJECTIVE To present an up-to-date review of the past year's most important clinical studies and reports of DILI, placing them into context of previous publications. METHODS A Medline search was conducted of all manuscripts appearing in the fields "hepatotoxicity" and "drug-induced liver injury" during the calendar year 2008. The most clinically relevant English language case reports and studies exploring mechanisms and risk factors for DILI were then chosen for review, and supplemented with older literature where appropriate. CONCLUSIONS As in past years, 2008 was replete with publications dealing with virtually all facets of DILI, including updated incidence and prevalence data, as well as the latest information regarding mechanisms of liver injury. Data from the first 300 patients in the National Institute of Health-sponsored DILI Network registry of > 100 non-acetaminophen causes were presented. Antimicrobials and CNS drugs were responsible for > 60% of cases, with herbals and dietary supplements being increasingly reported. Identification of genetic predispositions to DILI is coming of age with the FDA calling for the testing of human leukocyte antigen B(*)5701 before the use of abacavir to reduce the risk of hypersensitivity reactions. Several groups emphasized the pitfalls in utilizing Roussel Uclaf Causality Assessment Method and other causality assessment methodologies, and an updated review appeared on the use of potentially hepatotoxic medications in patients with underlying liver disease.
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Affiliation(s)
- Gordon Liss
- Georgetown University Medical Center, Division of Gastroenterology, 3800 Reservoir Road, NW, Washington, DC 20007, USA
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