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Tang LWT, DaSilva E, Lapham K, Obach RS. Evaluation of Icotinib as a Potent and Selective Inhibitor of Aldehyde Oxidase for Reaction Phenotyping in Human Hepatocytes. Drug Metab Dispos 2024; 52:565-573. [PMID: 38565303 DOI: 10.1124/dmd.124.001693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/18/2024] [Accepted: 03/18/2024] [Indexed: 04/04/2024] Open
Abstract
Aldehyde oxidase (AO) is a molybdenum cofactor-containing cytosolic enzyme that has gained prominence due to its involvement in the developmental failure of several drug candidates in first-in-human trials. Unlike cytochrome P450s (P450) and glucuronosyltransferase, AO substrates have been plagued by poor in vitro to in vivo extrapolation, leading to low systemic exposures and underprediction of human dose. However, apart from measuring a drug's AO clearance rates, it is also important to determine the relative contribution to metabolism by this enzyme (fm,AO). Although hydralazine is the most well-studied time-dependent inhibitor (TDI) of AO and is frequently employed for AO reaction phenotyping in human hepatocytes to derive fm,AO, multiple studies have expressed concerns pertaining to its utility in providing accurate estimates of fm,AO values due to its propensity to significantly inhibit P450s at the concentrations typically used for reaction phenotyping. In this study, we characterized icotinib, a cyclized analog of erlotinib, as a potent TDI of AO-inactivating human liver cytosolic zoniporide 2-oxidation equipotently with erlotinib with a maximal inactivate rate/inactivator concentration at half maximal inactivation rate (K I) ratio of 463 and 501 minute-1mM-1 , respectively. Moreover, icotinib also exhibits selectivity against P450 and elicits significantly weaker inhibition against human liver microsomal UGT1A1/3 as compared with erlotinib. Finally, we evaluated icotinib as an inhibitor of AO for reaction phenotyping in cryopreserved human hepatocytes and demonstrated that it can yield more accurate prediction of fm,AO compared with hydralazine and induce sustained suppression of AO activity at higher cell densities, which will be important for reaction phenotyping endeavors of low clearance drugs SIGNIFICANCE STATEMENT: In this study, we characterized icotinib as a potent time-dependent inhibitor of AO with ample selectivity margins against the P450s and UGT1A1/3 and demonstrated its utility for reaction phenotyping in human hepatocytes to obtain accurate estimates of fm,AO for victim DDI risk predictions. We envisage the adoption of icotinib in place of hydralazine in AO reaction phenotyping.
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Affiliation(s)
- Lloyd Wei Tat Tang
- Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut
| | - Ethan DaSilva
- Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut
| | - Kimberly Lapham
- Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut
| | - R Scott Obach
- Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut
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Liu J, Vernikovskaya D, Bora G, Carlo A, Burchett W, Jordan S, Tang LWT, Yang J, Che Y, Chang G, Troutman MD, Di L. Novel Multiplexed High Throughput Screening of Selective Inhibitors for Drug-Metabolizing Enzymes Using Human Hepatocytes. AAPS J 2024; 26:36. [PMID: 38546903 DOI: 10.1208/s12248-024-00908-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 03/07/2024] [Indexed: 04/02/2024] Open
Abstract
Selective chemical inhibitors are critical for reaction phenotyping to identify drug-metabolizing enzymes that are involved in the elimination of drug candidates. Although relatively selective inhibitors are available for the major cytochrome P450 enzymes (CYP), they are quite limited for the less common CYPs and non-CYPs. To address this gap, we developed a multiplexed high throughput screening (HTS) assay using 20 substrate reactions of multiple enzymes to simultaneously monitor the inhibition of enzymes in a 384-well format. Four 384-well assay plates can be run at the same time to maximize throughput. This is the first multiplexed HTS assay for drug-metabolizing enzymes reported. The HTS assay is technologically enabled with state-of-the-art robotic systems and highly sensitive modern LC-MS/MS instrumentation. Virtual screening is utilized to identify inhibitors for HTS based on known inhibitors and enzyme structures. Screening of ~4600 compounds generated many hits for many drug-metabolizing enzymes including the two time-dependent and selective aldehyde oxidase inhibitors, erlotinib and dibenzothiophene. The hit rate is much higher than that for the traditional HTS for biological targets due to the promiscuous nature of the drug-metabolizing enzymes and the biased compound selection process. Future efforts will focus on using this method to identify selective inhibitors for enzymes that do not currently have quality hits and thoroughly characterizing the newly identified selective inhibitors from our screen. We encourage colleagues from other organizations to explore their proprietary libraries using a similar approach to identify better inhibitors that can be used across the industry.
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Affiliation(s)
- Jianhua Liu
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Daria Vernikovskaya
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Gary Bora
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Anthony Carlo
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Woodrow Burchett
- Global Biometrics and Data Management, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Samantha Jordan
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Lloyd Wei Tat Tang
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Joy Yang
- Medicinal Chemistry, Pfizer Worldwide Research and Development, Cambridge, Massachusetts, USA
| | - Ye Che
- Discovery Sciences, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - George Chang
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Matthew D Troutman
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA
| | - Li Di
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, Connecticut, USA.
- Recursion Pharmaceuticals, Salt Lake City, UT, USA.
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Mao Z, Yu Y, Ba G, Zhao H, Shi Q, Cao Y, Xie W, Zhang J, Sun H, Chen F. Non-cytochrome P450 enzyme aldehyde oxidase is involved in the oxidative metabolic pathway of diquat and its detoxification effect. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 199:105805. [PMID: 38458670 DOI: 10.1016/j.pestbp.2024.105805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 03/10/2024]
Abstract
Diquat (DQ) poisoning has garnered attention in recent years, primarily due to the rising incidence of cases worldwide, coupled with the absence of a viable antidote for its treatment. Despite the fact that diquat monopyridone (DQ-M) has been identified as a significant metabolite of DQ, the enzyme responsible for its formation remains unknown. In this study, we have identified aldehyde oxidase (AOX) as a vital enzyme involved in DQ oxidative metabolism. The metabolism of DQ to DQ-M was significantly inhibited by AOX inhibitors including raloxifene and hydralazine. The source of oxygen incorporated into DQ-M was proved to be from water through a H218O incubation experiment which further corroborated DQ-M formation via AOX metabolism. The product of DQ-M in vitro generated by fresh rat tissues co-incubation was consistent with its AOX expression. The result of the molecular docking analysis of DQ and AOX protein showed that DQ is capable of binding to AOX. Furthermore, the cytotoxicity of DQ was significantly higher than DQ-M at the same concentration tested in six cell types. This work is the first to uncover the involvement of aldehyde oxidase, a non-cytochrome P450 enzyme, in the oxidative metabolic pathway of diquat, thus providing a potential target for the development of detoxification treatment.
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Affiliation(s)
- Zhengsheng Mao
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China.
| | - Youjia Yu
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China
| | - Gen Ba
- Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Department of Emergency, Jiangsu Province Hospital, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hongmei Zhao
- Department of Emergency Medicine, Huaian First People's Hospital, Huaian, PR China
| | - Qifang Shi
- Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Department of Emergency, Jiangsu Province Hospital, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yue Cao
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China
| | - Weiran Xie
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China
| | - Jinsong Zhang
- Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Department of Emergency, Jiangsu Province Hospital, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China
| | - Hao Sun
- Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Department of Emergency Medicine, Nanjing Drum Tower Hospital, Nanjing, PR China; Key Laboratory of Modern Toxicology of Ministry of Education, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China.
| | - Feng Chen
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Institute of poisoning, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China; Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, Jiangsu 211166, PR China.
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Izat N, Bolleddula J, Abbasi A, Cheruzel L, Jones RS, Moss D, Ortega-Muro F, Parmentier Y, Peterkin VC, Tian DD, Venkatakrishnan K, Zientek MA, Barber J, Houston JB, Galetin A, Scotcher D. Challenges and Opportunities for In Vitro-In Vivo Extrapolation of Aldehyde Oxidase-Mediated Clearance: Toward a Roadmap for Quantitative Translation. Drug Metab Dispos 2023; 51:1591-1606. [PMID: 37751998 DOI: 10.1124/dmd.123.001436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/25/2023] [Accepted: 08/28/2023] [Indexed: 09/28/2023] Open
Abstract
Underestimation of aldehyde oxidase (AO)-mediated clearance by current in vitro assays leads to uncertainty in human dose projections, thereby reducing the likelihood of success in drug development. In the present study we first evaluated the current drug development practices for AO substrates. Next, the overall predictive performance of in vitro-in vivo extrapolation of unbound hepatic intrinsic clearance (CLint,u) and unbound hepatic intrinsic clearance by AO (CLint,u,AO) was assessed using a comprehensive literature database of in vitro (human cytosol/S9/hepatocytes) and in vivo (intravenous/oral) data collated for 22 AO substrates (total of 100 datapoints from multiple studies). Correction for unbound fraction in the incubation was done by experimental data or in silico predictions. The fraction metabolized by AO (fmAO) determined via in vitro/in vivo approaches was found to be highly variable. The geometric mean fold errors (gmfe) for scaled CLint,u (mL/min/kg) were 10.4 for human hepatocytes, 5.6 for human liver cytosols, and 5.0 for human liver S9, respectively. Application of these gmfe's as empirical scaling factors improved predictions (45%-57% within twofold of observed) compared with no correction (11%-27% within twofold), with the scaling factors qualified by leave-one-out cross-validation. A road map for quantitative translation was then proposed following a critical evaluation on the in vitro and clinical methodology to estimate in vivo fmAO In conclusion, the study provides the most robust system-specific empirical scaling factors to date as a pragmatic approach for the prediction of in vivo CLint,u,AO in the early stages of drug development. SIGNIFICANCE STATEMENT: Confidence remains low when predicting in vivo clearance of AO substrates using in vitro systems, leading to de-prioritization of AO substrates from the drug development pipeline to mitigate risk of unexpected and costly in vivo impact. The current study establishes a set of empirical scaling factors as a pragmatic tool to improve predictability of in vivo AO clearance. Developing clinical pharmacology strategies for AO substrates by utilizing mass balance/clinical drug-drug interaction data will help build confidence in fmAO.
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Affiliation(s)
- Nihan Izat
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Jayaprakasam Bolleddula
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Armina Abbasi
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Lionel Cheruzel
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Robert S Jones
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Darren Moss
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Fatima Ortega-Muro
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Yannick Parmentier
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Vincent C Peterkin
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Dan-Dan Tian
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Karthik Venkatakrishnan
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Michael A Zientek
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - J Brian Houston
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Aleksandra Galetin
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
| | - Daniel Scotcher
- Centre for Applied Pharmacokinetic Research, The University of Manchester, Manchester, UK (N.I., Ji.B., J.B.H., A.G., D.S.); EMD Serono Research & Development Institute, Inc., Billerica, Massachusetts (Ja.B., K.V.); Amgen Inc., South San Francisco, California (A.A.); Genentech, Inc., South San Francisco, California (L.C., R.S.J.); Janssen Pharmaceutical Companies of Johnson & Johnson, Beerse, Belgium (D.M.); GSK R&D, Tres Cantos, Madrid, Spain (F.O.M.); Technologie Servier, Orléans, France (Y.P.); AbbVie Inc., North Chicago, Illinois (V.C.P.); Eli Lilly and Company, Indianapolis, Indiana (D.-D.T.); and Takeda Pharmaceuticals Limited, San Diego, California (M.A.Z.)
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5
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Chan TS, Byer-Alcorace AJ, Latli B, Liu P, Maw HH, Raymond KG, Scaringella YS, Teitelbaum AM, Wang T, Whitcher-Johnstone A, Taub ME. Characterization of Divergent Metabolic Pathways in Elucidating an Unexpected, Slow-Forming, and Long Half-Life Major Metabolite of Iclepertin. Pharm Res 2023; 40:1901-1913. [PMID: 37280472 DOI: 10.1007/s11095-023-03530-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 05/01/2023] [Indexed: 06/08/2023]
Abstract
PURPOSE After single oral dosing of the glycine reuptake transporter (GlyT1) inhibitor, iclepertin (BI 425809), a single major circulating metabolite, M530a, was identified. However, upon multiple dosing, a second major metabolite, M232, was observed with exposure levels ~ twofold higher than M530a. Studies were conducted to characterize the metabolic pathways and enzymes responsible for formation of both major human metabolites. METHODS In vitro studies were conducted with human and recombinant enzyme sources and enzyme-selective inhibitors. The production of iclepertin metabolites was monitored by LC-MS/MS. RESULTS Iclepertin undergoes rapid oxidation to a putative carbinolamide that spontaneously opens to an aldehyde, M528, which then undergoes reduction by carbonyl reductase to the primary alcohol, M530a. However, the carbinolamide can also undergo a much slower oxidation by CYP3A to form an unstable imide metabolite, M526, that is subsequently hydrolyzed by a plasma amidase to form M232. This difference in rate of metabolism of the carbinolamine explains why high levels of the M232 metabolite were not observed in vitro and in single dose studies in humans, but were observed in longer-term multiple dose studies. CONCLUSIONS The long half-life iclepertin metabolite M232 is formed from a common carbinolamine intermediate, that is also a precursor of M530a. However, the formation of M232 occurs much more slowly, likely contributing to its extensive exposure in vivo. These results highlight the need to employ adequate clinical study sampling periods and rigorous characterization of unexpected metabolites, especially when such metabolites are categorized as major, thus requiring safety assessment.
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Affiliation(s)
- Tom S Chan
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA.
| | - Alexander J Byer-Alcorace
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
| | - Bachir Latli
- Department of Chemical Development, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
| | - Pingrong Liu
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
| | - Hlaing H Maw
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
| | - Klairynne G Raymond
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
| | - Young-Sun Scaringella
- Department of Biotherapeutics Discovery, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
| | - Aaron M Teitelbaum
- Department of Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | - Ting Wang
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
| | - Andrea Whitcher-Johnstone
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
- DMPK Oncology, AstraZeneca Inc., 35 Gatehouse Dr., Waltham, MA, 02451, USA
| | - Mitchell E Taub
- Department of Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., 900 Ridgebury Rd., Ridgefield, CT, 06877, USA
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Khalid R, Mahmood S, Mohamed Sofian Z, Hilles AR, Hashim NM, Ge Y. Microneedles and Their Application in Transdermal Delivery of Antihypertensive Drugs-A Review. Pharmaceutics 2023; 15:2029. [PMID: 37631243 PMCID: PMC10459756 DOI: 10.3390/pharmaceutics15082029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/30/2023] [Accepted: 07/12/2023] [Indexed: 08/27/2023] Open
Abstract
One of the most cutting-edge, effective, and least invasive pharmaceutical innovations is the utilization of microneedles (MNs) for drug delivery, patient monitoring, diagnostics, medicine or vaccine delivery, and other medical procedures (e.g., intradermal vaccination, allergy testing, dermatology, and blood sampling). The MN-based system offers many advantages, such as minimal cost, high medical effectiveness, comparatively good safety, and painless drug application. Drug delivery through MNs can possibly be viewed as a viable instrument for various macromolecules (e.g., proteins, peptides, and nucleic acids) that are not efficiently administered through traditional approaches. This review article provides an overview of MN-based research in the transdermal delivery of hypertensive drugs. The critical attributes of microneedles are discussed, including the mechanism of drug release, pharmacokinetics, fabrication techniques, therapeutic applications, and upcoming challenges. Furthermore, the therapeutic perspective and improved bioavailability of hypertensive drugs that are poorly aqueous-soluble are also discussed. This focused review provides an overview of reported studies and the recent progress of MN-based delivery of hypertensive drugs, paving the way for future pharmaceutical uses. As MN-based drug administration bypasses first-pass metabolism and the high variability in drug plasma levels, it has grown significantly more important for systemic therapy. In conclusion, MN-based drug delivery of hypertensive drugs for increasing bioavailability and patient compliance could support a new trend of hypertensive drug delivery and provide an alternative option, overcoming the restrictions of the current dosage forms.
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Affiliation(s)
- Ramsha Khalid
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur 50603, Malaysia; (R.K.); (Z.M.S.)
| | - Syed Mahmood
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur 50603, Malaysia; (R.K.); (Z.M.S.)
| | - Zarif Mohamed Sofian
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur 50603, Malaysia; (R.K.); (Z.M.S.)
| | - Ayah R. Hilles
- INHART, International Islamic University Malaysia, Jalan Gombak, Kuala Lumpur 53100, Malaysia;
| | - Najihah Mohd Hashim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur 50603, Malaysia;
- Center for Natural Products Research and Drug Discovery (CENAR), Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Yi Ge
- School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, UK
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7
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Di L. Recent advances in measurement of metabolic clearance, metabolite profile and reaction phenotyping of low clearance compounds. Expert Opin Drug Discov 2023; 18:1209-1219. [PMID: 37526497 DOI: 10.1080/17460441.2023.2238606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 07/17/2023] [Indexed: 08/02/2023]
Abstract
INTRODUCTION Low metabolic clearance is usually a highly desirable property of drug candidates in order to reduce dose and dosing frequency. However, measurement of low clearance can be challenging in drug discovery. A number of new tools have recently been developed to address the gaps in the measurement of intrinsic clearance, identification of metabolites, and reaction phenotyping of low clearance compounds. AREAS COVERED The new methodologies of low clearance measurements are discussed, including the hepatocyte relay, HepatoPac®, HμREL®, and spheroid systems. In addition, metabolite formation rate determination and in vivo allometric scaling approaches are covered as alternative methods for low clearance measurements. With these new methods, measurement of ~ 20-fold lower limit of intrinsic clearance can be achieved. The advantages and limitations of each approach are highlighted. EXPERT OPINION Although several novel methods have been developed in recent years to address the challenges of low clearance, these assays tend to be time and labor intensive and costly. Future innovations focusing on developing systems with high enzymatic activities, ultra-sensitive universal quantifiable detectors, and artificial intelligence will further enhance our ability to explore the low clearance space.
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Affiliation(s)
- Li Di
- Research Fellow, Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, CT, USA
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8
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Teschke R. Molecular Idiosyncratic Toxicology of Drugs in the Human Liver Compared with Animals: Basic Considerations. Int J Mol Sci 2023; 24:ijms24076663. [PMID: 37047633 PMCID: PMC10095090 DOI: 10.3390/ijms24076663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/16/2023] [Accepted: 03/27/2023] [Indexed: 04/05/2023] Open
Abstract
Drug induced liver injury (DILI) occurs in patients exposed to drugs at recommended doses that leads to idiosyncratic DILI and provides an excellent human model with well described clinical features, liver injury pattern, and diagnostic criteria, based on patients assessed for causality using RUCAM (Roussel Uclaf Causality Assessment Method) as original method of 1993 or its update of 2016. Overall, 81,856 RUCAM based DILI cases have been published until mid of 2020, allowing now for an analysis of mechanistic issues of the disease. From selected DILI cases with verified diagnosis by using RUCAM, direct evidence was provided for the involvement of the innate and adapted immune system as well as genetic HLA (Human Leucocyte Antigen) genotypes. Direct evidence for a role of hepatic immune systems was substantiated by (1) the detection of anti-CYP (Cytochrome P450) isoforms in the plasma of affected patients, in line with the observation that 65% of the drugs most implicated in DILI are metabolized by a range of CYP isoforms, (2) the DIAIH (drug induced autoimmune hepatitis), a subgroup of idiosyncratic DILI, which is characterized by high RUCAM causality gradings and the detection of plasma antibodies such as positive serum anti-nuclear antibodies (ANA) and anti-smooth muscle antibodies (ASMA), rarely also anti-mitochondrial antibodies (AMA), (3) the effective treatment with glucocorticoids in part of an unselected RUCAM based DILI group, and (4) its rare association with the immune-triggered Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) caused by a small group of drugs. Direct evidence of a genetic basis of idiosyncratic DILI was shown by the association of several HLA genotypes for DILI caused by selected drugs. Finally, animal models of idiosyncratic DILI mimicking human immune and genetic features are not available and further search likely will be unsuccessful. In essence and based on cases of DILI with verified diagnosis using RUCAM for causality evaluation, there is now substantial direct evidence that immune mechanisms and genetics can account for idiosyncratic DILI by many but not all implicated drugs, which may help understand the mechanistic background of the disease and contribute to new approaches of therapy and prevention.
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Affiliation(s)
- Rolf Teschke
- Department of Internal Medicine II, Division of Gastroenterology and Hepatology, Klinikum Hanau, D-63450 Hanau, Germany
- Academic Teaching Hospital of the Medical Faculty, Goethe University Frankfurt/Main, D-60590 Frankfurt am Main, Germany
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9
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Gajula SNR, Nathani TN, Patil RM, Talari S, Sonti R. Aldehyde oxidase mediated drug metabolism: an underpredicted obstacle in drug discovery and development. Drug Metab Rev 2022; 54:427-448. [PMID: 36369949 DOI: 10.1080/03602532.2022.2144879] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Aldehyde oxidase (AO) has garnered curiosity as a non-CYP metabolizing enzyme in drug development due to unexpected consequences such as toxic metabolite generation and high metabolic clearance resulting in the clinical failure of new drugs. Therefore, poor AO mediated clearance prediction in preclinical nonhuman species remains a significant obstacle in developing novel drugs. Various isoforms of AO, such as AOX1, AOX3, AOX3L1, and AOX4 exist across species, and different AO activity among humans influences the AO mediated drug metabolism. Therefore, carefully considering the unique challenges is essential in developing successful AO substrate drugs. The in vitro to in vivo extrapolation underpredicts AO mediated drug clearance due to the lack of reliable representative animal models, substrate-specific activity, and the discrepancy between absolute concentration and activity. An in vitro tool to extrapolate in vivo clearance using a yard-stick approach is provided to address the underprediction of AO mediated drug clearance. This approach uses a range of well-known AO drug substrates as calibrators for qualitative scaling new drugs into low, medium, or high clearance category drugs. So far, in vivo investigations on chimeric mice with humanized livers (humanized mice) have predicted AO mediated metabolism to the best extent. This review addresses the critical aspects of the drug discovery stage for AO metabolism studies, challenges faced in drug development, approaches to tackle AO mediated drug clearance's underprediction, and strategies to decrease the AO metabolism of drugs.
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Affiliation(s)
- Siva Nageswara Rao Gajula
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER)-Hyderabad, Balanagar, Telangana, India
| | - Tanaaz Navin Nathani
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER)-Hyderabad, Balanagar, Telangana, India
| | - Rashmi Madhukar Patil
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER)-Hyderabad, Balanagar, Telangana, India
| | - Sasikala Talari
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER)-Hyderabad, Balanagar, Telangana, India
| | - Rajesh Sonti
- Department of Pharmaceutical Analysis, National Institute of Pharmaceutical Education and Research (NIPER)-Hyderabad, Balanagar, Telangana, India
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10
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Latham BD, Oskin DS, Crouch RD, Vergne MJ, Jackson KD. Cytochromes P450 2C8 and 3A Catalyze the Metabolic Activation of the Tyrosine Kinase Inhibitor Masitinib. Chem Res Toxicol 2022; 35:1467-1481. [PMID: 36048877 DOI: 10.1021/acs.chemrestox.2c00057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Masitinib is a small molecule tyrosine kinase inhibitor under investigation for the treatment of amyotrophic lateral sclerosis, mastocytosis, and COVID-19. Hepatotoxicity has been reported in some patients while taking masitinib. The liver injury is thought to involve hepatic metabolism of masitinib by cytochrome P450 (P450) enzymes to form chemically reactive, potentially toxic metabolites. The goal of the current investigation was to determine the P450 enzymes involved in the metabolic activation of masitinib in vitro. In initial studies, masitinib (30 μM) was incubated with pooled human liver microsomes in the presence of NADPH and potassium cyanide to trap reactive iminium ion metabolites as cyano adducts. Masitinib metabolites and cyano adducts were analyzed using reversed-phase liquid chromatography-tandem mass spectrometry. The primary active metabolite, N-desmethyl masitinib (M485), and several oxygenated metabolites were detected along with four reactive metabolite cyano adducts (MCN510, MCN524, MCN526, and MCN538). To determine which P450 enzymes were involved in metabolite formation, reaction phenotyping experiments were conducted by incubation of masitinib (2 μM) with a panel of recombinant human P450 enzymes and by incubation of masitinib with human liver microsomes in the presence of P450-selective chemical inhibitors. In addition, enzyme kinetic assays were conducted to determine the relative kinetic parameters (apparent Km and Vmax) of masitinib metabolism and cyano adduct formation. Integrated analysis of the results from these experiments indicates that masitinib metabolic activation is catalyzed primarily by P450 3A4 and 2C8, with minor contributions from P450 3A5 and 2D6. These findings provide further insight into the pathways involved in the generation of reactive, potentially toxic metabolites of masitinib. Future studies are needed to evaluate the impact of masitinib metabolism on the toxicity of the drug in vivo.
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Affiliation(s)
- Bethany D Latham
- Division of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill Eshelman School of Pharmacy, Chapel Hill, North Carolina 27599, United States
| | - D Spencer Oskin
- Department of Pharmaceutical Sciences, Lipscomb University College of Pharmacy and Health Sciences, Nashville, Tennessee 37204, United States
| | - Rachel D Crouch
- Department of Pharmaceutical Sciences, Lipscomb University College of Pharmacy and Health Sciences, Nashville, Tennessee 37204, United States
| | - Matthew J Vergne
- Department of Pharmaceutical Sciences, Lipscomb University College of Pharmacy and Health Sciences, Nashville, Tennessee 37204, United States
| | - Klarissa D Jackson
- Division of Pharmacotherapy and Experimental Therapeutics, University of North Carolina at Chapel Hill Eshelman School of Pharmacy, Chapel Hill, North Carolina 27599, United States
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11
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Toselli F, Golding M, Nicolaï J, Gillent E, Chanteux H. Drug clearance by aldehyde oxidase: can we avoid clinical failure? Xenobiotica 2022; 52:890-903. [PMID: 36170034 DOI: 10.1080/00498254.2022.2129519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Despite increased awareness of aldehyde oxidase (AO) as a major drug-metabolising enzyme, predicting the pharmacokinetics of its substrates remains challenging. Several drug candidates have been terminated due to high clearance, which were subsequently discovered to be AO substrates. Even retrospective extrapolation of human clearance, from models more sensitive to AO activity, often resulted in underprediction.The questions of the current work thus were: Is there an acceptable degree of in vitro AO metabolism that does not result in high in vivo human clearance? And, if so, how can this be predicted?We built an in vitro/in vivo correlation using known AO substrates, combining multiple in vitro parameters to calculate the blood metabolic clearance mediated by AO (CLbAO). This value was compared with observed blood clearance (CLb-obs), establishing cut-off CLbAO values, to discriminate between low and high CLb-obs. The model was validated using additional literature compounds, and CLb-obs was predicted in the correct category.This simple, categorical, semi-quantitative yet multi-factorial model is readily applicable in drug discovery. Further, it is valuable for high-clearance compounds, as it predicts the CLb group, rather than an exact CLb value, for the substrates of this poorly-characterised enzyme.
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Affiliation(s)
| | | | - Johan Nicolaï
- Development Science, UCB Biopharma, Braine-l'Alleud, Belgium
| | - Eric Gillent
- Development Science, UCB Biopharma, Braine-l'Alleud, Belgium
| | - Hugues Chanteux
- Development Science, UCB Biopharma, Braine-l'Alleud, Belgium
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12
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Rendić SP, Crouch RD, Guengerich FP. Roles of selected non-P450 human oxidoreductase enzymes in protective and toxic effects of chemicals: review and compilation of reactions. Arch Toxicol 2022; 96:2145-2246. [PMID: 35648190 PMCID: PMC9159052 DOI: 10.1007/s00204-022-03304-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 04/26/2022] [Indexed: 12/17/2022]
Abstract
This is an overview of the metabolic reactions of drugs, natural products, physiological compounds, and other (general) chemicals catalyzed by flavin monooxygenase (FMO), monoamine oxidase (MAO), NAD(P)H quinone oxidoreductase (NQO), and molybdenum hydroxylase enzymes (aldehyde oxidase (AOX) and xanthine oxidoreductase (XOR)), including roles as substrates, inducers, and inhibitors of the enzymes. The metabolism and bioactivation of selected examples of each group (i.e., drugs, “general chemicals,” natural products, and physiological compounds) are discussed. We identified a higher fraction of bioactivation reactions for FMO enzymes compared to other enzymes, predominately involving drugs and general chemicals. With MAO enzymes, physiological compounds predominate as substrates, and some products lead to unwanted side effects or illness. AOX and XOR enzymes are molybdenum hydroxylases that catalyze the oxidation of various heteroaromatic rings and aldehydes and the reduction of a number of different functional groups. While neither of these two enzymes contributes substantially to the metabolism of currently marketed drugs, AOX has become a frequently encountered route of metabolism among drug discovery programs in the past 10–15 years. XOR has even less of a role in the metabolism of clinical drugs and preclinical drug candidates than AOX, likely due to narrower substrate specificity.
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Affiliation(s)
| | - Rachel D Crouch
- College of Pharmacy and Health Sciences, Lipscomb University, Nashville, TN, 37204, USA
| | - F Peter Guengerich
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, 37232-0146, USA
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13
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Case Study 11: Considerations for Enzyme Mapping Experiments-Interaction Between the Aldehyde Oxidase Inhibitor Hydralazine and Glutathione. Methods Mol Biol 2021. [PMID: 34272718 DOI: 10.1007/978-1-0716-1554-6_30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Often it may be convenient and efficient to address multiple research questions with a single experiment. In many instances, however, the best approach is to design the experiment to address one question at a time. The design of enzyme mapping experiments is discussed in this chapter, focusing on considerations pertinent to the study of aldehyde oxidase (AO) vs. cytochrome P450 metabolism. Specifically, a case is presented in which reduced glutathione (GSH) was included in an experiment with human liver S9 fraction to trap reactive metabolites generated from cytochrome P450-mediated metabolism of lapatinib and its O-dealkylated metabolite, M1 (question 1). The AO inhibitor hydralazine was included in this experiment to investigate the involvement of AO-mediated metabolism of M1 (question 2). The presence of GSH was found to interfere with the inhibitory activity of hydralazine. Consideration of the time-dependent nature of hydralazine inhibitory activity toward AO when designing this experiment could have predicted the potential for GSH to interfere with hydralazine. This case underscores the importance of clearly identifying the research question, tailoring the experimental protocol to answer that question, and then meticulously considering how the experimental conditions could influence the results, particularly if attempting to address multiple questions with a single experiment.
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14
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Soltani S, Hallaj-Nezhadi S, Rashidi MR. A comprehensive review of in silico approaches for the prediction and modulation of aldehyde oxidase-mediated drug metabolism: The current features, challenges and future perspectives. Eur J Med Chem 2021; 222:113559. [PMID: 34119831 DOI: 10.1016/j.ejmech.2021.113559] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 05/10/2021] [Accepted: 05/13/2021] [Indexed: 01/09/2023]
Abstract
The importance of aldehyde oxidase (AOX) in drug metabolism necessitates the development and application of the in silico rational drug design methods as an integral part of drug discovery projects for the early prediction and modulation of AOX-mediated metabolism. The current study represents an up-to-date and thorough review of in silico studies of AOX-mediated metabolism and modulation methods. In addition, the challenges and the knowledge gap that should be covered have been discussed. The importance of aldehyde oxidase (AOX) in drug metabolism is a hot topic in drug discovery. Different strategies are available for the modulation of the AOX-mediated metabolism of drugs. Application of the rational drug design methods as an integral part of drug discovery projects is necessary for the early prediction of AOX-mediated metabolism. The current study represents a comprehensive review of AOX molecular structure, AOX-mediated reactions, AOX substrates, AOX inhibition, approaches to modify AOX-mediated metabolism, prediction of AOX metabolism/substrates/inhibitors, and the AOX related structure-activity relationship (SAR) studies. Furthermore, an up-to-date and thorough review of in silico studies of AOX metabolism has been carried out. In addition, the challenges and the knowledge gap that should be covered in the scientific literature have been discussed in the current review.
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Affiliation(s)
- Somaieh Soltani
- Pharmaceutical Analysis Research Center and Pharmacy Faculty, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Somayeh Hallaj-Nezhadi
- Drug Applied Research Center and Pharmacy Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Reza Rashidi
- Stem Cell and Regenerative Medicine Institute and Pharmacy faculty, Tabriz University of Medical Sciences, Iran.
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15
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Dhuria NV, Haro B, Kapadia A, Lobo KA, Matusow B, Schleiff MA, Tantoy C, Sodhi JK. Recent developments in predicting CYP-independent metabolism. Drug Metab Rev 2021; 53:188-206. [PMID: 33941024 DOI: 10.1080/03602532.2021.1923728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
As lead optimization efforts have successfully reduced metabolic liabilities due to cytochrome P450 (CYP)-mediated metabolism, there has been an increase in the frequency of involvement of non-CYP enzymes in the metabolism of investigational compounds. Although there have been numerous notable advancements in the characterization of non-CYP enzymes with respect to their localization, reaction mechanisms, species differences and identification of typical substrates, accurate prediction of non-CYP-mediated clearance, with a particular emphasis with the difficulties in accounting for any extrahepatic contributions, remains a challenge. The current manuscript comprehensively summarizes the recent advancements in the prediction of drug metabolism and the in vitro to in vitro extrapolation of clearance for substrates of non-CYP drug metabolizing enzymes.
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Affiliation(s)
- Nikhilesh V Dhuria
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - Bianka Haro
- School of Medicine and Health Sciences, The George Washington University, Washington, DC, USA
| | - Amit Kapadia
- California Poison Control Center, University of California San Francisco, San Diego, CA, USA
| | | | - Bernice Matusow
- Department of Drug Metabolism and Pharmacokinetics, Plexxikon Inc, Berkeley, CA, USA
| | - Mary A Schleiff
- Department of Biochemistry and Molecular Biology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Christina Tantoy
- Department of Drug Metabolism and Pharmacokinetics, Plexxikon Inc, Berkeley, CA, USA
| | - Jasleen K Sodhi
- Department of Drug Metabolism and Pharmacokinetics, Plexxikon Inc, Berkeley, CA, USA.,Department of Bioengineering and Therapeutic Sciences, Schools of Pharmacy and Medicine, University of California, San Francisco, CA, USA
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16
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Paragas EM, Choughule K, Jones JP, Barr JT. Enzyme Kinetics, Pharmacokinetics, and Inhibition of Aldehyde Oxidase. Methods Mol Biol 2021; 2342:257-284. [PMID: 34272698 DOI: 10.1007/978-1-0716-1554-6_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Aldehyde oxidase (AO) has emerged as an important drug metabolizing enzyme over the last decade. Several compounds have failed in the clinic because the clearance or toxicity was underestimated by preclinical species. Human AO is much more active than rodent AO, and dogs do not have functional AO. Metabolic products from AO-catalyzed oxidation are generally nonreactive and often they have much lower solubility. AO metabolism is not limited to oxidation as AO can also catalyze reduction of oxygen and nitrite. Reduction of oxygen leads to the reactive oxygen species (ROS) superoxide radical anion and hydrogen peroxide. Reduction of nitrite leads to the formation of nitric oxide with potential pharmacological implications. AO is also reported to catalyze the reductive metabolism of nitro-compounds, N-oxides, sulfoxides, isoxazoles, isothiazoles, nitrite, and hydroxamic acids. These reductive transformations may cause toxicity due to the formation of reactive metabolites. Moreover, the inhibition kinetics are complex, and multiple probe substrates should be used when assessing the potential for DDIs. Finally, AO appears to be amenable to computational predictions of both regioselectivity and rates of reaction, which holds promise for virtual screening.
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Affiliation(s)
- Erickson M Paragas
- Department of Pharmaceutical Sciences, Temple University School of Pharmacy, Philadelphia, PA, USA
| | - Kanika Choughule
- Pharmacokinetics, Pharmacodynamics and Drug Metabolism, Merck, Boston, MA, USA
| | - Jeffrey P Jones
- Department of Chemistry, Washington State University, Pullman, WA, USA
| | - John T Barr
- Pharmacokinetics, Pharmacodynamics and Drug Metabolism, Merck, South San Francisco, CA, USA.
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17
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Dougherty JA, Elder CT. Managing Multiple Myeloma in the Face of Drug-Induced Adverse Drug Reaction. J Pharm Pract 2020; 35:500-504. [PMID: 33317373 DOI: 10.1177/0897190020977763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Drug-induced liver injury has been reported to cause up to 10% of adverse drug reactions in the United States. Risk factors for druginduced liver injury include female gender, older age, interacting medications and drugs that are metabolized by the liver. This case report describes a patient who was newly initiated on tizanidine, an alpha2 adrenergic agonist used for muscle spasm and musculoskeletal pain, and bortezomib, a proteasome inhibitor used for multiple myeloma. Both medications are metabolized by cytochrome P450 isoenzyme 1A2. The medications were suspected of causing acute hepatitis based on the timing of their initiation and evidence to suggest that they can cause acute hepatitis. The Naranjo adverse drug reaction scale was scored as possible. In addition, the drugs' blood levels may have been increased by acyclovir and hydralazine, both inhibitors of cytochrome P450 isoenzyme 1A2. A dilemma for the team was how to best manage bortezomib. It is part of first line treatment for multiple myeloma when combined with lenalidomide and dexamethasone. Other proteasome inhibitors are available for multiple myeloma treatment. When starting chemotherapy, it is important to be aware of medications that cause a rise in liver enzymes, potential drug interactions, and how best to manage the clinical consequences.
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Affiliation(s)
- John A Dougherty
- Lloyd L. Gregory School of Pharmacy, 8527Palm Beach Atlantic University, West Palm Beach, FL, USA
| | - Christopher T Elder
- Lloyd L. Gregory School of Pharmacy, 8527Palm Beach Atlantic University, West Palm Beach, FL, USA
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18
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Lopinavir-Ritonavir in SARS-CoV-2 Infection and Drug-Drug Interactions with Cardioactive Medications. Cardiovasc Drugs Ther 2020; 35:427-440. [PMID: 32918656 PMCID: PMC7486594 DOI: 10.1007/s10557-020-07070-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/01/2020] [Indexed: 12/23/2022]
Abstract
Lopinavir-ritonavir combination is being used for the treatment of SARS-CoV-2 infection. A low dose of ritonavir is added to other protease inhibitors to take advantage of potent inhibition of cytochrome (CYP) P450 3A4, thereby significantly increasing the plasma concentration of coadministered lopinavir. Ritonavir also inhibits CYP2D6 and induces CYP2B6, CYP2C19, CYP2C9, and CYP1A2. This potent, time-dependent interference of major hepatic drug-metabolizing enzymes by ritonavir leads to several clinically important drug-drug interactions. A number of patients presenting with acute coronary syndrome and acute heart failure may have SARS-CoV-2 infection simultaneously. Lopinavir-ritonavir is added to their prescription of multiple cardiac medications leading to potential drug-drug interactions. Many cardiology, pulmonology, and intensivist physicians have never been exposed to clinical scenarios requiring co-prescription of cardiac and antiviral therapies. Therefore, it is essential to enumerate these drug-drug interactions, to avoid any serious drug toxicity, to consider alternate and safer drugs, and to ensure better patient care.
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19
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Katyayan K, Yi P, Monk S, Cassidy K. Excretion, Mass Balance, and Metabolism of [ 14C]LY3202626 in Humans: An Interplay of Microbial Reduction, Reabsorption, and Aldehyde Oxidase Oxidation That Leads to an Extended Excretion Profile. Drug Metab Dispos 2020; 48:698-707. [PMID: 32499340 DOI: 10.1124/dmd.120.000009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 04/22/2020] [Indexed: 12/24/2022] Open
Abstract
The mass balance, excretion, and metabolism of LY3202626 were determined in healthy subjects after oral administration of a single dose of 10 mg of (approximately 100 μCi) [14C]LY3202626. Excretion of radioactivity was slow and incomplete, with approximately 75% of the dose recovered after 504 hours of sample collection. The mean total recovery of the radioactive dose was 31% and 44% in the feces and urine, respectively. Because of low plasma total radioactivity, plasma metabolite profiling was conducted by accelerator mass spectrometry. Metabolism of LY3202626 occurred primarily via O-demethylation (M2) and amide hydrolysis (M1, M3, M4, and M5). Overall, parent drug, M1, M2, and M4 were the largest circulating components in plasma, and M2 and M4 were the predominant excretory metabolites. The slow elimination of total radioactivity was proposed to result from an unusual enterohepatic recirculation pathway involving microbial reduction of metabolite M2 to M16 in the gut and reabsorption of M16, followed by hepatic oxidation of M16 back to M2. Supporting in vitro experiments showed that M2 is reduced to M16 anaerobically in fecal homogenate and that M16 is oxidized in the liver by aldehyde oxidase to M2. LY3202626 also showed a potential to form a reactive sulfenic acid intermediate. A portion of plasma radioactivity was unextractable and presumably bound covalently to plasma proteins. In vitro incubation of LY3202626 in human liver microsomes in the presence of NADPH with dimedone as a trapping agent implicated the formation of the proposed sulfenic acid intermediate. SIGNIFICANCE STATEMENT: The excretion of radioactivity in humans after oral administration of a single dose of 10 mg of [14C]LY3202626 was very slow. The results from in vitro experiments suggested that an interplay between microbial reduction, reabsorption, and aldehyde oxidase oxidation (M2 → M16 → M2) could be a reason for extended radioactivity excretion profile. In vitro metabolism also showed that LY3202626 has the potential to form a reactive sulfenic acid intermediate that could potentially covalently bind to plasma protein and result in the observed unextractable radioactivity from plasma.
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Affiliation(s)
| | - Ping Yi
- Drug Disposition Eli Lilly and Company, Indianapolis, Indiana
| | - Scott Monk
- Drug Disposition Eli Lilly and Company, Indianapolis, Indiana
| | - Kenneth Cassidy
- Drug Disposition Eli Lilly and Company, Indianapolis, Indiana
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20
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Lu C, Di L. In vitro
and
in vivo
methods to assess pharmacokinetic drug– drug interactions in drug discovery and development. Biopharm Drug Dispos 2020; 41:3-31. [DOI: 10.1002/bdd.2212] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 09/27/2019] [Accepted: 10/28/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Chuang Lu
- Department of DMPKSanofi Company Waltham MA 02451
| | - Li Di
- Pharmacokinetics, Dynamics and MetabolismPfizer Worldwide Research & Development Groton CT 06340
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21
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Manevski N, King L, Pitt WR, Lecomte F, Toselli F. Metabolism by Aldehyde Oxidase: Drug Design and Complementary Approaches to Challenges in Drug Discovery. J Med Chem 2019; 62:10955-10994. [PMID: 31385704 DOI: 10.1021/acs.jmedchem.9b00875] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Aldehyde oxidase (AO) catalyzes oxidations of azaheterocycles and aldehydes, amide hydrolysis, and diverse reductions. AO substrates are rare among marketed drugs, and many candidates failed due to poor pharmacokinetics, interspecies differences, and adverse effects. As most issues arise from complex and poorly understood AO biology, an effective solution is to stop or decrease AO metabolism. This perspective focuses on rational drug design approaches to modulate AO-mediated metabolism in drug discovery. AO biological aspects are also covered, as they are complementary to chemical design and important when selecting the experimental system for risk assessment. The authors' recommendation is an early consideration of AO-mediated metabolism supported by computational and in vitro experimental methods but not an automatic avoidance of AO structural flags, many of which are versatile and valuable building blocks. Preferably, consideration of AO-mediated metabolism should be part of the multiparametric drug optimization process, with the goal to improve overall drug-like properties.
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Affiliation(s)
- Nenad Manevski
- UCB Celltech , 208 Bath Road , Slough SL13WE , United Kingdom
| | - Lloyd King
- UCB Celltech , 208 Bath Road , Slough SL13WE , United Kingdom
| | - William R Pitt
- UCB Celltech , 208 Bath Road , Slough SL13WE , United Kingdom
| | - Fabien Lecomte
- UCB Celltech , 208 Bath Road , Slough SL13WE , United Kingdom
| | - Francesca Toselli
- UCB BioPharma , Chemin du Foriest 1 , 1420 Braine-l'Alleud , Belgium
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22
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Yang X, Ryu S, Di L. Dasotraline as a selective cytochrome 2B6 inhibitor for reaction phenotyping. Biopharm Drug Dispos 2019; 40:358-361. [PMID: 31674039 DOI: 10.1002/bdd.2207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/12/2019] [Accepted: 10/09/2019] [Indexed: 11/07/2022]
Abstract
Reaction phenotyping using human liver microsomes or hepatocytes with chemical inhibitors is one of the most commonly applied methods to assess the fraction metabolized (fm ) of drug candidates by enzymes. The fm information is critical to understanding the risk of victim drug-drug interactions in the clinic. Inhibitor selectivity is essential in order to generate reliable data and irreversible inhibitors are often preferred over reversible inhibitors to minimize the impact of inhibitor depletion. Although many selective cytochrome P450 (CYP) inhibitors are available, the identification of selective CYP2B6 inhibitors has been challenging due to cross inhibition to the other enzymes. In this study, dasotraline was evaluated as a selective inactivator of CYP2B6 under reaction phenotyping conditions with human hepatocytes. The results show that dasotraline is a very selective inactivator for CYP2B6 with minimal inhibition to other enzymes. A concentration of 0.1 μM dasotraline is recommended for reaction phenotyping with a hepatocyte cell density of 0.5 million cells/ml or 0.5 μM for 2 million cells/ml, when using a 15 minute preincubation, as well as the protocol of inactivator removal before the addition of substrates.
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Affiliation(s)
- Xin Yang
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, CT, 06340
| | - Sangwoo Ryu
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, CT, 06340
| | - Li Di
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, CT, 06340
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23
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Dalvie D, Di L. Aldehyde oxidase and its role as a drug metabolizing enzyme. Pharmacol Ther 2019; 201:137-180. [PMID: 31128989 DOI: 10.1016/j.pharmthera.2019.05.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 03/27/2019] [Indexed: 11/29/2022]
Abstract
Aldehyde oxidase (AO) is a cytosolic enzyme that belongs to the family of structurally related molybdoflavoproteins like xanthine oxidase (XO). The enzyme is characterized by broad substrate specificity and marked species differences. It catalyzes the oxidation of aromatic and aliphatic aldehydes and various heteroaromatic rings as well as reduction of several functional groups. The references to AO and its role in metabolism date back to the 1950s, but the importance of this enzyme in the metabolism of drugs has emerged in the past fifteen years. Several reviews on the role of AO in drug metabolism have been published in the past decade indicative of the growing interest in the enzyme and its influence in drug metabolism. Here, we present a comprehensive monograph of AO as a drug metabolizing enzyme with emphasis on marketed drugs as well as other xenobiotics, as substrates and inhibitors. Although the number of drugs that are primarily metabolized by AO are few, the impact of AO on drug development has been extensive. We also discuss the effect of AO on the systemic exposure and clearance these clinical candidates. The review provides a comprehensive analysis of drug discovery compounds involving AO with the focus on developmental candidates that were reported in the past five years with regards to pharmacokinetics and toxicity. While there is only one known report of AO-mediated clinically relevant drug-drug interaction (DDI), a detailed description of inhibitors and inducers of AO known to date has been presented here and the potential risks associated with DDI. The increasing recognition of the importance of AO has led to significant progress in predicting the site of AO-mediated metabolism using computational methods. Additionally, marked species difference in expression of AO makes it is difficult to predict human clearance with high confidence. The progress made towards developing in vivo, in vitro and in silico approaches for predicting AO metabolism and estimating human clearance of compounds that are metabolized by AO have also been discussed.
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Affiliation(s)
- Deepak Dalvie
- Drug Metabolism and Pharmacokinetics, Celgene Corporation, 10300, Campus Point Drive, San Diego, CA 92121, USA.
| | - Li Di
- Pharmacokinetics, Dynamics and Metabolism, Pfizer Worldwide Research and Development, Groton, CT 06340, UK
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24
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Affiliation(s)
- Christine Beedham
- Honorary Senior Lecturer, Faculty of Life Sciences, School of Pharmacy and Medical Sciences, University of Bradford, Bradford, UK
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