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Aluri KC, Slavsky M, Tan Y, Whitcher‐Johnstone A, Zhang Z, Hariparsad N, Ramsden D. Aminobenzotriazole inhibits and induces several key drug metabolizing enzymes complicating its utility as a pan CYP inhibitor for reaction phenotyping. Clin Transl Sci 2024; 17:e13746. [PMID: 38501263 PMCID: PMC10949176 DOI: 10.1111/cts.13746] [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: 11/09/2023] [Revised: 02/02/2024] [Accepted: 02/05/2024] [Indexed: 03/20/2024] Open
Abstract
Aminobenzotriazole (ABT) is commonly used as a non-selective inhibitor of cytochrome P450 (CYP) enzymes to assign contributions of CYP versus non-CYP pathways to the metabolism of new chemical entities. Despite widespread use, a systematic review of the drug-drug interaction (DDI) potential for ABT has not been published nor have the implications for using it in plated hepatocyte models for low clearance reaction phenotyping. The goal being to investigate the utility of ABT as a pan-CYP inhibitor for reaction phenotyping of low clearance compounds by evaluating stability over the incubation period, inhibition potential against UGT and sulfotransferase enzymes, and interaction with nuclear receptors involved in the regulation of drug metabolizing enzymes and transporters. Induction potential for additional inhibitors used to ascribe fraction metabolism (fm ), pathway including erythromycin, ketoconazole, azamulin, atipamezole, ZY12201, and quinidine was also investigated. ABT significantly inhibited the clearance of a non-selective UGT substrate 4-methylumbelliferone, with several UGTs shown to be inhibited using selective probe substrates in human hepatocytes and rUGTs. The inhibitors screened in the induction assay were shown to induce enzymes regulated through Aryl Hydrocarbon Receptor, Constitutive Androstane Receptor, and Pregnane X Receptor. Lastly, a case study identifying the mechanisms of a clinical DDI between Palbociclib and ARV-471 is provided as an example of the potential consequences of using ABT to derive fm . This work demonstrates that ABT is not an ideal pan-CYP inhibitor for reaction phenotyping of low clearance compounds and establishes a workflow that can be used to enable robust characterization of other prospective inhibitors.
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Affiliation(s)
| | | | - Ying Tan
- AstraZenecaWalthamMassachusettsUSA
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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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Walles M, Pähler A, Isin EM, Weidolf L. Meeting report of the second European Biotransformation Workshop. Xenobiotica 2022; 52:426-431. [PMID: 35410573 DOI: 10.1080/00498254.2022.2064253] [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: 10/18/2022]
Abstract
Challenges and opportunities in the field of biotransformation were presented and discussed at the 2nd European Biotransformation workshop which was conducted virtually in collaboration with the DMDG on November 24/25, 2021. Here we summarise the presentations and discussions from this workshop.The following topics were covered:Regulatory requirements and biotransformation studies for antibody drug conjugates (ADCs) and antisense oligonucleotides (ASOs)Solutions for mass spectral data processing of peptides and oligonucleotidesFuture outsourcing needs in biotransformation for new modalitiesEstablished quantitative and qualitative workflows for metabolite identificationNew in vitro systems to study new chemical entities (NCEs) with low metabolic turnoverNew strategies on the timing of the human ADME (absorption, distribution, metabolism, excretion) study and to investigate the impact of human microbiome on drug development.
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Affiliation(s)
- M Walles
- Department, a Pharmacokinetic Sciences, Novartis Institutes for Biomedical Research, Basel, Switzerland
| | - A Pähler
- Pharma Research and Early Development, F. Hoffmann-La Roche
| | - E M Isin
- DMPK, Translational Medicine, Servier, Orléans, France
| | - L Weidolf
- Drug Metabolism and Pharmacokinetics, Research and Early Development, Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
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Klammers F, Goetschi A, Ekiciler A, Walter I, Parrott N, Fowler S, Umehara K. Estimation of fraction metabolized by cytochrome P450 (CYP) enzymes using long-term co-cultured human hepatocytes. Drug Metab Dispos 2022; 50:566-575. [PMID: 35246464 DOI: 10.1124/dmd.121.000765] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/25/2022] [Indexed: 11/22/2022] Open
Abstract
Estimation of the fraction of a drug metabolized by individual hepatic cytochrome P450 (CYP) enzymes relative to hepatic metabolism (fm,CYP) or total clearance (fCL,CYP) has been challenging for low turnover compounds due to insufficient resolution of the intrinsic clearance (CLint) measurement in vitro and difficulties in quantifying the formation of low abundance metabolites. To overcome this gap, inhibition of drug depletion or selective metabolite formation for 7 marker CYP substrates was investigated using chemical inhibitors and a micro-patterned hepatocyte co-culture system (HepatoPac®). The use of 3 µM itraconazole was successfully validated for estimation of fm,CYP3A4 by demonstration of fm values within a 2-fold of in vivo estimates for 10 out of 13 CYP3A4 substrates in a reference set of marketed drugs. Other CYP3A4 inhibitors (ketoconazole and posaconazole) were not optimal for estimation of fm,CYP3A4 for low turnover compounds due to their high CLint. The current study also demonstrated that selective inhibition sufficient for fm calculation was achieved by inhibitors of CYP1A2 (20 µM furafylline), CYP2C8 (40 µM montelukast), CYP2C9 (40 µM sulfaphenazole), CYP2C19 (3 µM (-)N-3-benzyl-phenobarbital) and CYP2D6 (5 µM quinidine). Good estimation of fm,CYP2B6 was not possible in this study due to the poor selectivity of the tested inhibitor (20 µM ticlopidine). The approach verified in this study can result in an improved fm estimation which is aligned with the regulatory agencies' guidance and can support a victim drug-drug interaction risk assessment strategy for low clearance discovery and development drug candidates. Significance Statement Successful qualification of a chemical inhibition assay for estimation of fraction metabolized requires chemical inhibitors which retain sufficient unbound concentrations over time in the incubates. The current co-cultured hepatocyte assay enabled estimation of fraction metabolized, especially by CYP3A4, during the drug discovery phase where metabolite quantification methods may not be available. The method enables the assessment of PK variability and victim DDI risks due to enzyme polymorphism or inhibition/induction with more confidence, especially for low clearance drug candidates.
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Affiliation(s)
| | | | - Aynur Ekiciler
- Pharmaceutical Sciences, F. Hoffmann-LaRoche, Switzerland
| | | | | | | | - Kenichi Umehara
- Pharmaceutical Sciences, Roche Pharmaceutical Research and Early Development, Switzerland
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Desch M, Wunderlich G, Goettel M, Goetz S, Liesenfeld KH, Chan TS, Rosenbrock H, Sennewald R, Link J, Keller S, Wind S. Effects of Cytochrome P450 3A4 Induction and Inhibition on the Pharmacokinetics of BI 425809, a Novel Glycine Transporter 1 Inhibitor. Eur J Drug Metab Pharmacokinet 2021; 47:91-103. [PMID: 34716565 PMCID: PMC8752533 DOI: 10.1007/s13318-021-00723-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/19/2021] [Indexed: 12/02/2022]
Abstract
Background and Objective Increased glycine availability at the synaptic cleft may enhance N-methyl-D-aspartate receptor signalling and provide a promising therapeutic strategy for cognitive impairment associated with schizophrenia. These studies aimed to assess the pharmacokinetics of BI 425809, a potent glycine-transporter-1 inhibitor, when co-administered with a strong cytochrome P450 3A4 (CYP3A4) inhibitor (itraconazole) and inducer (rifampicin). Methods In vitro studies using recombinant CYPs, human liver microsomes, and human hepatocytes were conducted to determine the CYP isoforms responsible for BI 425809 metabolism. In addition, two open-label, fixed-treatment period, phase I studies in healthy male volunteers are described. Period 1: participants received oral BI 425809 25 mg (single dose) on day 1; period 2: participants received multiple doses, across 10 days, of oral itraconazole or rifampicin combined with a single dose of oral BI 425809 25 mg on day 4/7 of the itraconazole/rifampicin treatment, respectively. Pharmacokinetic and safety endpoints were assessed in the absence/presence of itraconazole/rifampicin and included area under the concentration-time curve (AUC) over the time interval 0–167 h (AUC0‒167; itraconazole), 0–168 h (AUC0‒168; rifampicin), or 0–infinity (AUC0-∞; rifampicin and itraconazole), maximum measured concentration (Cmax) of BI 425809, and adverse events. Results In vitro results suggested that CYP3A4 accounted for ≥ 90% of the metabolism of BI 425809. BI 425809 exposure (adjusted geometric mean ratio [%]) was higher in the presence of itraconazole (AUC0‒167: 265.3; AUC0−∞: 597.0; Cmax: 116.1) and lower in the presence of rifampicin (AUC0‒168: 10.3; AUC0−∞: 9.8; Cmax: 37.4) compared with BI 425809 alone. Investigational treatments were well tolerated. Conclusions Systemic exposure of BI 425809 was altered in the presence of strong CYP3A4 modulators, corroborating in vitro results that CYP3A4 mediates a major metabolic pathway for BI 425809. Trial Registration Number NCT02342717 (registered on 15 January 2015) and NCT03082183 (registered on 10 March 2017) Supplementary Information The online version contains supplementary material available at 10.1007/s13318-021-00723-y.
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Affiliation(s)
- Michael Desch
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany.
| | | | - Markus Goettel
- Boehringer Ingelheim International GmbH, Ingelheim am Rhein, Germany
| | - Sophia Goetz
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany
| | - Karl-Heinz Liesenfeld
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany
| | - Tom S Chan
- Boehringer Ingelheim Pharmaceuticals Inc, Ridgefield, CT, USA
| | - Holger Rosenbrock
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany
| | - Regina Sennewald
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany
| | - Jasmin Link
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany
| | - Sascha Keller
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany
| | - Sven Wind
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Str. 65, 88397, Biberach an der Riss, Baden Württemberg, Germany
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Fowler S, Brink A, Cleary Y, Guenther A, Heinig K, Husser C, Kletzl H, Kratochwil NA, Mueller L, Savage M, Stillhart C, Tuerck DW, Ullah M, Umehara K, Poirier A. Addressing today's ADME challenges in the translation of in vitro absorption, distribution, metabolism and excretion characteristics to human: A case study of the SMN2 mRNA splicing modifier risdiplam. Drug Metab Dispos 2021; 50:65-75. [PMID: 34620695 DOI: 10.1124/dmd.121.000563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 09/30/2021] [Indexed: 11/22/2022] Open
Abstract
Small molecules that present complex absorption, distribution, metabolism, and elimination (ADME) properties can be challenging to investigate as potential therapeutics. Acquiring data through standard methods can yield results that are insufficient to describe the in vivo situation, which can affect downstream development decisions. Implementing in vitro - in vivo - in silico strategies throughout the drug development process is effective in identifying and mitigating risks while speeding up their development. Risdiplam (EVRYSDI®) - an orally bioavailable, small molecule approved by the U.S. Food and Drug Administration and more recently by the European Medicines Agency for the treatment of patients {greater than or equal to}2 months of age with spinal muscular atrophy (SMA), is presented here as a case study. Risdiplam is a low turnover compound whose metabolism is mediated through a non-cytochrome P450 enzymatic pathway. Four main challenges of risdiplam are discussed: predicting in vivo hepatic clearance, determining in vitro metabolites with regard to metabolites in safety testing guidelines, elucidating enzymes responsible for clearance, and estimating potential drug-drug interactions. A combination of in vitro and in vivo results was successfully extrapolated and used to develop a robust physiologically based pharmacokinetic model of risdiplam. These results were verified through early clinical studies, further strengthening the understanding of the ADME properties of risdiplam in humans. These approaches can be applied to other compounds with similar ADME profiles, which may be difficult to investigate using standard methods. Significance Statement Risdiplam is the first approved, small molecule, survival of motor neuron 2 mRNA splicing modifier for the treatment of spinal muscular atrophy. The approach taken to characterize the absorption, distribution, metabolism and excretion (ADME) properties of risdiplam during clinical development incorporated in vitro-in vivo-in silico techniques, which may be applicable to other small molecules with challenging ADME. These strategies may be useful in improving the speed at which future drug molecules can be developed.
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Affiliation(s)
| | - Andreas Brink
- Pharmaceutical Sciences, Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Switzerland
| | - Yumi Cleary
- Pharmaceutical Sciences, Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Switzerland
| | - Andreas Guenther
- Pharmaceutical Sciences, Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Switzerland
| | - Katja Heinig
- Pharmaceutical Sciences, Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Switzerland
| | | | - Heidemarie Kletzl
- Pharmaceutical Sciences, Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Switzerland
| | | | - Lutz Mueller
- Pharmaceutical Sciences, Roche Pharma Research and Early Development, F. Hoffmann-La Roche Ltd, Switzerland
| | - Mark Savage
- Unilabs York Bioanalytical Solutions, United Kingdom
| | - Cordula Stillhart
- Formulation & Process Sciences, Pharmaceutical R&D, F. Hoffmann-La Roche Ltd, Switzerland
| | | | - Mohammed Ullah
- Pharmaceutical Sciences, Roche Pharmaceutical Research and Early Development, Switzerland
| | - Kenichi Umehara
- Pharmaceutical Sciences, Roche Pharmaceutical Research and Early Development, Switzerland
| | - Agnès Poirier
- Pharmaceutical Sciences, F.Hoffmann-La Roche, Switzerland
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Monckton CP, Brown GE, Khetani SR. Latest impact of engineered human liver platforms on drug development. APL Bioeng 2021; 5:031506. [PMID: 34286173 PMCID: PMC8286174 DOI: 10.1063/5.0051765] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 06/21/2021] [Indexed: 01/07/2023] Open
Abstract
Drug-induced liver injury (DILI) is a leading cause of drug attrition, which is partly due to differences between preclinical animals and humans in metabolic pathways. Therefore, in vitro human liver models are utilized in biopharmaceutical practice to mitigate DILI risk and assess related mechanisms of drug transport and metabolism. However, liver cells lose phenotypic functions within 1–3 days in two-dimensional monocultures on collagen-coated polystyrene/glass, which precludes their use to model the chronic effects of drugs and disease stimuli. To mitigate such a limitation, bioengineers have adapted tools from the semiconductor industry and additive manufacturing to precisely control the microenvironment of liver cells. Such tools have led to the fabrication of advanced two-dimensional and three-dimensional human liver platforms for different throughput needs and assay endpoints (e.g., micropatterned cocultures, spheroids, organoids, bioprinted tissues, and microfluidic devices); such platforms have significantly enhanced liver functions closer to physiologic levels and improved functional lifetime to >4 weeks, which has translated to higher sensitivity for predicting drug outcomes and enabling modeling of diseased phenotypes for novel drug discovery. Here, we focus on commercialized engineered liver platforms and case studies from the biopharmaceutical industry showcasing their impact on drug development. We also discuss emerging multi-organ microfluidic devices containing a liver compartment that allow modeling of inter-tissue crosstalk following drug exposure. Finally, we end with key requirements for engineered liver platforms to become routine fixtures in the biopharmaceutical industry toward reducing animal usage and providing patients with safe and efficacious drugs with unprecedented speed and reduced cost.
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Affiliation(s)
- Chase P Monckton
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - Grace E Brown
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - Salman R Khetani
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA
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Kamel A, Bowlin S, Hosea N, Arkilo D, Laurenza A. In Vitro Metabolism of Slowly Cleared G Protein-Coupled Receptor 139 Agonist TAK-041 Using Rat, Dog, Monkey, and Human Hepatocyte Models (HepatoPac): Correlation with In Vivo Metabolism. Drug Metab Dispos 2020; 49:121-132. [PMID: 33273044 DOI: 10.1124/dmd.120.000246] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 11/24/2020] [Indexed: 12/26/2022] Open
Abstract
Hepatic metabolism of low-clearance compound TAK-041 was studied in two different in vitro model systems using rat, dog, monkey, and human suspended cryopreserved hepatocytes and HepatoPac micropatterned coculture model primary hepatocytes. The aim of this work was to investigate the most appropriate system to assess the biotransformation of TAK-041, determine any notable species difference in the rate and in the extent of its metabolic pathways, and establish correlation with in vivo metabolism. TAK-041 exhibited very low turnover in suspended cryopreserved hepatocyte suspensions for all species, with no metabolites observed in human hepatocytes. However, incubations conducted for up to 14 days in the HepatoPac model resulted in more robust metabolic turnover. The major biotransformation pathways of TAK-041 proceed via hydroxylation on the benzene ring fused to the oxotriazine moiety and subsequent sulfate, glucuronide, and glutathione conjugation reactions. The glutathione conjugate of TAK-041 undergoes further downstream metabolism to produce the cysteine S-conjugate, which then undergoes N-acetylation to mercapturic acid and/or conversion to β-lyase-derived thiol metabolites. The minor biotransformation pathways include novel ring closure and hydrolysis, hydroxylation, oxidative N-dealkylation, and subsequent reduction. The HepatoPac model shows a notable species difference in the rate and in the extent of metabolic pathways of TAK-041, with dogs having the fastest metabolic clearance and humans the slowest. Furthermore, the model shows its suitability for establishing correlation with in vivo metabolism of low-turnover and extensively metabolized compounds such as TAK-041, displaying an extensive and unusual downstream sequential β-lyase-derived thiol metabolism in preclinical species and human. SIGNIFICANCE STATEMENT: This study investigated the most appropriate in vitro system to assess the biotransformation of the low-turnover and extensively metabolized compound TAK-041, determine any notable species difference in the rate and in the extent of its metabolic pathways, and establish correlation with in vivo metabolism. The HepatoPac model was identified and showed its suitability for species comparison and establishing correlation, with in vivo metabolism displaying an extensive and unusual downstream sequential β-lyase-derived thiol metabolism in preclinical species and human.
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Affiliation(s)
- Amin Kamel
- Global Drug Metabolism and Pharmacokinetics, Takeda California Inc., San Diego, California (A.K., S.B., N.H.) and Clinical and Neuroscience Therapeutic Area, Takeda Boston Inc., Boston, Massachusetts (D.A., A.L.)
| | - Steve Bowlin
- Global Drug Metabolism and Pharmacokinetics, Takeda California Inc., San Diego, California (A.K., S.B., N.H.) and Clinical and Neuroscience Therapeutic Area, Takeda Boston Inc., Boston, Massachusetts (D.A., A.L.)
| | - Natalie Hosea
- Global Drug Metabolism and Pharmacokinetics, Takeda California Inc., San Diego, California (A.K., S.B., N.H.) and Clinical and Neuroscience Therapeutic Area, Takeda Boston Inc., Boston, Massachusetts (D.A., A.L.)
| | - Dimitrios Arkilo
- Global Drug Metabolism and Pharmacokinetics, Takeda California Inc., San Diego, California (A.K., S.B., N.H.) and Clinical and Neuroscience Therapeutic Area, Takeda Boston Inc., Boston, Massachusetts (D.A., A.L.)
| | - Antonio Laurenza
- Global Drug Metabolism and Pharmacokinetics, Takeda California Inc., San Diego, California (A.K., S.B., N.H.) and Clinical and Neuroscience Therapeutic Area, Takeda Boston Inc., Boston, Massachusetts (D.A., A.L.)
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