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Schaller ML, Sykes ML, Mecano J, Solanki S, Huang W, Rebernick RJ, Beydoun S, Wang E, Bugarin-Lapuz A, Shah YM, Leiser SF. Fmo5 plays a sex-specific role in goblet cell maturation and mucus barrier formation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.05.588360. [PMID: 38645243 PMCID: PMC11030302 DOI: 10.1101/2024.04.05.588360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
The intestine plays a key role in metabolism, nutrient and water absorption, and provides both physical and immunological defense against dietary and luminal antigens. The protective mucus lining in the intestine is a critical component of intestinal barrier function that when compromised, can lead to dysfunctional intestinal barriers that are a defining characteristic of inflammatory bowel disease (IBD), among other intestinal diseases. Here, we define a new role for the flavin-containing monooxygenase family of enzymes in maintaining a healthy intestinal epithelium. In nematodes, we find that Cefmo-2 is necessary and sufficient for proper intestinal barrier function, intestinal actin expression, and is induced by intestinal damage. In mice, we utilize an intestine-specific, inducible knockout model of the prevalent gut Fmo (Fmo5) and find striking phenotypes within two weeks of knockout. These phenotypes include sex-dependent changes in colon epithelial histology, goblet cell localization and maturation factors, and mucus barrier formation. Each of these changes are significantly more severe in female mice, plausibly mirroring differences observed in some types of IBD in humans. Looking further at these phenotypes, we find increased protein folding stress in Fmo5 knockout animals and successfully rescue the severe female phenotype with addition of a chemical ER chaperone. Together, our results identify a new role for Fmo5 in the mammalian intestine and support a key role for Fmo5 in maintenance of ER/protein homeostasis and proper mucus barrier formation.
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Huang M, Duan S, Zhang Q, Guo L, Qin Z, Yang J. Deciphering the diurnal rhythm regulating mechanism of flavin-containing monooxygenase 3 in mouse liver. Int J Biochem Cell Biol 2024; 169:106538. [PMID: 38320728 DOI: 10.1016/j.biocel.2024.106538] [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: 09/18/2023] [Revised: 12/29/2023] [Accepted: 01/23/2024] [Indexed: 02/12/2024]
Abstract
Circadian genes play an important role in the field of drug metabolism. Flavin-containing monooxygenase 3 is a well-known phase I enzyme which participates in metabolism of many exogenous and endogenous substances, especially production of trimethylamine N-oxide. Here, we aimed to decipher diurnal rhythms of flavin-containing monooxygenase 3 expression and activity, and explore the regulation mechanism by clock genes. Our results showed that its mRNA and protein exhibited robust diurnal rhythms in mouse liver and cell lines. Consistently, significant alterations were observed for in vitro microsomal N-oxidation rates of procainamide, which kept in line with its protein expression at different time in wild-type and reverse erythroblastosis virus α knockout mice. Further, flavin-containing monooxygenase 3 was negatively regulated by E4 promoter-binding protein 4 in AML12 and Hepa1-6 cells, while it was positively influenced by reverse erythroblastosis virus α and brain and muscle ARNT-like protein-1. Moreover, luciferase reporter assays and electrophoretic mobility shift assays showed E4 promoter-binding protein 4 inhibited the transcription of flavin-containing monooxygenase 3 by binding to a D-box1 element (-1606/-1594 bp), while brain and muscle ARNT-like protein-1 positively activated the transcription via direct binding to three E-boxes (-863/-858 bp, -507/-498 bp, and -115/-104 bp) in this enzyme promoter. Taken together, this study would be helpful to reveal the mechanism of clock-controlled drug metabolism and facilitate the practice of chrono-therapeutics.
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Affiliation(s)
- Meixia Huang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Shuyi Duan
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Qiwen Zhang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Engineering Research Center for Application & Translation of Precision Clinical Pharmacy, Zhengzhou 450052, China
| | - Lianxia Guo
- Institute of Molecular Rhythm and Metabolism, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Zifei Qin
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Engineering Research Center for Application & Translation of Precision Clinical Pharmacy, Zhengzhou 450052, China.
| | - Jing Yang
- Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Henan Engineering Research Center for Application & Translation of Precision Clinical Pharmacy, Zhengzhou 450052, China.
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3
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Hao X, Li Y, Zhang Y, Bian J, Zhao J, Zhao Y, Hu L, Luo X, Yang C, Feng Y, Huang L. Individualized treatment with voriconazole in the Chinese population: Inflammation level as a novel marker for dose optimization. Br J Clin Pharmacol 2024; 90:440-451. [PMID: 37766511 DOI: 10.1111/bcp.15916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023] Open
Abstract
AIMS The aim of this study was to explore the influence and possible mechanisms of pharmacokinetics-related gene polymorphisms, especially CYP2C19 polymorphisms, and non-genetic factors combined with the inflammatory status on the voriconazole (VRC) metabolism of the Chinese population. METHODS Clinical studies were performed by collecting more than one VRC trough concentration and C-reactive protein (CRP) level. A total of 265 blood samples were collected from 120 patients. RESULTS Results of multiple regression analyses demonstrated that CYP2C19 genotypes and albumin (Alb) level remained predictors of Cmin ss/D in patients with no to mild inflammation (R2 = 0.12, P < .001). In addition, in patients with moderate to severe inflammation, it resulted in a significant model containing factors of CRP and total bilirubin (T-Bil) levels (R2 = 0.19, P < .001). In non-clinical studies, 32 rats were divided into control and inflammatory groups, and it was found that the mean residence time (MRT(0-t) ) of VRC in the inflammatory group was significantly longer than that in the control group (P < .001), which may be due to down-regulation of mRNA and protein expression of CYP2C19 (CYP2C6 in rats) through interleukin (IL)-6/signal transducer and activator of transcription (STAT) 3 pathway. CONCLUSIONS Therefore, the effect of CYP2C19 polymorphisms on VRC metabolism may be masked by inflammatory status, which should be of more concern than CYP2C19 polymorphisms in patients with moderate to severe inflammation. Additionally, the impact of Alb and T-Bil on VRC metabolism should not be disregarded.
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Affiliation(s)
- Xu Hao
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yuanyuan Li
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Ying Zhang
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Jialu Bian
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
- Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Jinxia Zhao
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
- Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Yinyu Zhao
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
- Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Lei Hu
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
| | - Xingxian Luo
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, China
| | - Changqing Yang
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yufei Feng
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
| | - Lin Huang
- Department of Pharmacy, Peking University People's Hospital, Beijing, China
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Flaherty CC, Phillips IR, Janmohamed A, Shephard EA. Living with trimethylaminuria and body and breath malodour: personal perspectives. BMC Public Health 2024; 24:222. [PMID: 38238734 PMCID: PMC10797923 DOI: 10.1186/s12889-024-17685-w] [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: 09/01/2023] [Accepted: 01/05/2024] [Indexed: 01/22/2024] Open
Abstract
BACKGROUND Many people suffer from body and breath malodour syndromes. One of these is trimethylaminuria, a condition characterized by excretion in breath and bodily fluids of trimethylamine, a volatile and odorous chemical that has the smell of rotting fish. Trimethylaminuria can be primary, due to mutations in the gene encoding flavin-containing monooxygenase 3, or secondary, due to various causes. To gain a better understanding of problems faced by United Kingdom residents affected by body and breath malodour conditions, we conducted a survey. METHODS Two anonymous online surveys, one for adults and one for parents/guardians of affected children, were conducted using the Opinio platform. Participants were invited via a trimethylaminuria advisory website. Questions were a mix of dropdown, checkbox and open-ended responses. Forty-four adults and three parents/guardians participated. The dropdown and checkbox responses were analysed using the Opinio platform. RESULTS All participants reported symptoms of body/breath odour. However, not all answered every question. Twenty-three respondents experienced difficulties in being offered a diagnostic test for trimethylaminuria. Problems encountered included lack of awareness of the disorder by medical professionals and reluctance to recognise symptoms. Of those tested, 52% were diagnosed with trimethylaminuria. The main problems associated with living with body/breath malodours were bullying, harassment and ostracism in either the workplace (90%) or in social settings (88%). All respondents thought their condition had disadvantaged them in their daily lives. Open-ended responses included loss of confidence, stress, exclusion, isolation, loneliness, depression and suicidal thoughts. Respondents thought their lives could be improved by greater awareness and understanding of malodour conditions by medical professionals, employers and the general public, and appreciation that the malodour was due to a medical condition and not their fault. CONCLUSIONS Breath and body malodour conditions can cause immense hardship and distress, both mentally and socially, having devastating effects on quality of life. It would be advantageous to establish a standardised pathway from primary care to a specialist unit with access to a robust and reliable test and diagnostic criteria. There is a need to recognise malodour disorders as a disability, giving affected individuals the same rights as those with currently recognised disabilities.
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Affiliation(s)
| | - Ian R Phillips
- Department of Structural and Molecular Biology, University College London, London, UK
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Azara Janmohamed
- Department of Clinical Pharmacology, St. Mary's Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - Elizabeth A Shephard
- Department of Structural and Molecular Biology, University College London, London, UK.
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Craig A, Kogler J, Laube M, Ullrich M, Donat CK, Wodtke R, Kopka K, Stadlbauer S. Preparation of 18F-Labeled Tracers Targeting Fibroblast Activation Protein via Sulfur [ 18F]Fluoride Exchange Reaction. Pharmaceutics 2023; 15:2749. [PMID: 38140090 PMCID: PMC10747913 DOI: 10.3390/pharmaceutics15122749] [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: 10/06/2023] [Revised: 11/14/2023] [Accepted: 12/02/2023] [Indexed: 12/24/2023] Open
Abstract
Early detection and treatment of cancers can significantly increase patient prognosis and enhance the quality of life of affected patients. The emerging significance of the tumor microenvironment (TME) as a new frontier for cancer diagnosis and therapy may be exploited by radiolabeled tracers for diagnostic imaging techniques such as positron emission tomography (PET). Cancer-associated fibroblasts (CAFs) within the TME are identified by biomarkers such as fibroblast activation protein alpha (FAPα), which are expressed on their surfaces. Targeting FAPα using small-molecule 18F-labeled inhibitors (FAPIs) has recently garnered significant attention for non-invasive tumor visualization using PET. Herein, two potent aryl-fluorosulfate-based FAPIs, 12 and 13, were synthetically prepared, and their inhibition potency was determined using a fluorimetric FAP assay to be IC50 9.63 and 4.17 nM, respectively. Radiofluorination was performed via the sulfur [18F]fluoride exchange ([18F]SuFEx) reaction to furnish [18F]12 and [18F]13 in high activity yields (AY) of 39-56% and molar activities (Am) between 20-55 GBq/µmol. In vitro experiments focused on the stability of the radiolabeled FAPIs after incubation with human serum, liver microsomes and liver cytosol. Preliminary PET studies of the radioligands were performed in healthy mice to investigate the in vivo biodistribution and 18F defluorination rate. Fast pharmacokinetics for the FAP-targeting tracers were retained and considerable bone uptake, caused by either 18F defluorination or radioligand accumulation, was observed. In summary, our findings demonstrate the efficiency of [18F]SuFEx as a radiolabeling method as well as its advantages and limitations with respect to PET tracer development.
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Affiliation(s)
- Austin Craig
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
| | - Jürgen Kogler
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
- Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, D-01062 Dresden, Germany
| | - Markus Laube
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
| | - Martin Ullrich
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
| | - Cornelius K. Donat
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
| | - Robert Wodtke
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
| | - Klaus Kopka
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
- Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, D-01062 Dresden, Germany
| | - Sven Stadlbauer
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, D-01328 Dresden, Germany; (A.C.)
- Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, D-01062 Dresden, Germany
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Fendt R, Ghallab A, Myllys M, Hofmann U, Hassan R, Hobloss Z, González D, Brackhagen L, Marchan R, Edlund K, Seddek AL, Abdelmageed N, Blank LM, Schlender JF, Holland CH, Hengstler JG, Kuepfer L. Increased sinusoidal export of drug glucuronides is a compensative mechanism in liver cirrhosis of mice. Front Pharmacol 2023; 14:1279357. [PMID: 38053838 PMCID: PMC10694292 DOI: 10.3389/fphar.2023.1279357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 11/01/2023] [Indexed: 12/07/2023] Open
Abstract
Rationale: Liver cirrhosis is known to affect drug pharmacokinetics, but the functional assessment of the underlying pathophysiological alterations in drug metabolism is difficult. Methods: Cirrhosis in mice was induced by repeated treatment with carbon tetrachloride for 12 months. A cocktail of six drugs was administered, and parent compounds as well as phase I and II metabolites were quantified in blood, bile, and urine in a time-dependent manner. Pharmacokinetics were modeled in relation to the altered expression of metabolizing enzymes. In discrepancy with computational predictions, a strong increase of glucuronides in blood was observed in cirrhotic mice compared to vehicle controls. Results: The deviation between experimental findings and computational simulations observed by analyzing different hypotheses could be explained by increased sinusoidal export and corresponded to increased expression of export carriers (Abcc3 and Abcc4). Formation of phase I metabolites and clearance of the parent compounds were surprisingly robust in cirrhosis, although the phase I enzymes critical for the metabolism of the administered drugs in healthy mice, Cyp1a2 and Cyp2c29, were downregulated in cirrhotic livers. RNA-sequencing revealed the upregulation of numerous other phase I metabolizing enzymes which may compensate for the lost CYP isoenzymes. Comparison of genome-wide data of cirrhotic mouse and human liver tissue revealed similar features of expression changes, including increased sinusoidal export and reduced uptake carriers. Conclusion: Liver cirrhosis leads to increased blood concentrations of glucuronides because of increased export from hepatocytes into the sinusoidal blood. Although individual metabolic pathways are massively altered in cirrhosis, the overall clearance of the parent compounds was relatively robust due to compensatory mechanisms.
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Affiliation(s)
- Rebekka Fendt
- Institute for Systems Medicine with Focus on Organ Interaction, University Hospital RWTH Aachen, Aachen, Germany
| | - Ahmed Ghallab
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Maiju Myllys
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Ute Hofmann
- Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology and University of Tübingen, Stuttgart, Germany
| | - Reham Hassan
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Zaynab Hobloss
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Daniela González
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Lisa Brackhagen
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Rosemarie Marchan
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Karolina Edlund
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Abdel-Latif Seddek
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, South Valley University, Qena, Egypt
| | - Noha Abdelmageed
- Department of Pharmacology, Faculty of Veterinary Medicine, Sohag University, Sohag, Egypt
| | - Lars M. Blank
- Institute of Applied Microbiology—iAMB, Aachen Biology and Biotechnology—ABBt, RWTH Aachen University, Aachen, Germany
| | - Jan-Frederik Schlender
- Pharmacometrics, Research and Development, Pharmaceuticals, Bayer AG, Leverkusen, Germany
| | - Christian H. Holland
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Jan G. Hengstler
- Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Dortmund, Germany
| | - Lars Kuepfer
- Institute for Systems Medicine with Focus on Organ Interaction, University Hospital RWTH Aachen, Aachen, Germany
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Zhang J, Qiu Z, Zhang Y, Wang G, Hao H. Intracellular spatiotemporal metabolism in connection to target engagement. Adv Drug Deliv Rev 2023; 200:115024. [PMID: 37516411 DOI: 10.1016/j.addr.2023.115024] [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: 04/25/2023] [Revised: 07/05/2023] [Accepted: 07/26/2023] [Indexed: 07/31/2023]
Abstract
The metabolism in eukaryotic cells is a highly ordered system involving various cellular compartments, which fluctuates based on physiological rhythms. Organelles, as the smallest independent sub-cell unit, are important contributors to cell metabolism and drug metabolism, collectively designated intracellular metabolism. However, disruption of intracellular spatiotemporal metabolism can lead to disease development and progression, as well as drug treatment interference. In this review, we systematically discuss spatiotemporal metabolism in cells and cell subpopulations. In particular, we focused on metabolism compartmentalization and physiological rhythms, including the variation and regulation of metabolic enzymes, metabolic pathways, and metabolites. Additionally, the intricate relationship among intracellular spatiotemporal metabolism, metabolism-related diseases, and drug therapy/toxicity has been discussed. Finally, approaches and strategies for intracellular spatiotemporal metabolism analysis and potential target identification are introduced, along with examples of potential new drug design based on this.
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Affiliation(s)
- Jingwei Zhang
- State Key Laboratory of Natural Medicines, Key Laboratory of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University, Nanjing, China
| | - Zhixia Qiu
- Center of Drug Metabolism and Pharmacokinetics, School of Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yongjie Zhang
- Clinical Pharmacokinetics Laboratory, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Guangji Wang
- State Key Laboratory of Natural Medicines, Key Laboratory of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University, Nanjing, China; Jiangsu Provincial Key Laboratory of Drug Metabolism and Pharmacokinetics, Research Unit of PK-PD Based Bioactive Components and Pharmacodynamic Target Discovery of Natural Medicine of Chinese Academy of Medical Sciences, China Pharmaceutical University, Nanjing, China.
| | - Haiping Hao
- State Key Laboratory of Natural Medicines, Key Laboratory of Drug Metabolism & Pharmacokinetics, China Pharmaceutical University, Nanjing, China.
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Phillips IR, Veeravalli S, Khadayate S, Shephard EA. Metabolomic and transcriptomic analyses of Fmo5-/- mice reveal roles for flavin-containing monooxygenase 5 (FMO5) in NRF2-mediated oxidative stress response, unfolded protein response, lipid homeostasis, and carbohydrate and one-carbon metabolism. PLoS One 2023; 18:e0286692. [PMID: 37267233 PMCID: PMC10237457 DOI: 10.1371/journal.pone.0286692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 05/20/2023] [Indexed: 06/04/2023] Open
Abstract
Flavin-containing monooxygenase 5 (FMO5) is a member of the FMO family of proteins, best known for their roles in the detoxification of foreign chemicals and, more recently, in endogenous metabolism. We have previously shown that Fmo5-/- mice display an age-related lean phenotype, with much reduced weight gain from 20 weeks of age. The phenotype is characterized by decreased fat deposition, lower plasma concentrations of glucose, insulin and cholesterol, higher glucose tolerance and insulin sensitivity, and resistance to diet-induced obesity. In the present study we report the use of metabolomic and transcriptomic analyses of livers of Fmo5-/- and wild-type mice to identify factors underlying the lean phenotype of Fmo5-/- mice and gain insights into the function of FMO5. Metabolomics was performed by the Metabolon platform, utilising ultrahigh performance liquid chromatography-tandem mass spectroscopy. Transcriptomics was performed by RNA-Seq and results analysed by DESeq2. Disruption of the Fmo5 gene has wide-ranging effects on the abundance of metabolites and expression of genes in the liver. Metabolites whose concentration differed between Fmo5-/- and wild-type mice include several saturated and monounsaturated fatty acids, complex lipids, amino acids, one-carbon intermediates and ADP-ribose. Among the genes most significantly and/or highly differentially expressed are Apoa4, Cd36, Fitm1, Hspa5, Hyou1, Ide, Me1 and Mme. The results reveal that FMO5 is involved in upregulating the NRF2-mediated oxidative stress response, the unfolded protein response and response to hypoxia and cellular stress, indicating a role for the enzyme in adaptation to oxidative and metabolic stress. FMO5 also plays a role in stimulating a wide range of metabolic pathways and processes, particularly ones involved in lipid homeostasis, the uptake and metabolism of glucose, the generation of cytosolic NADPH, and in one-carbon metabolism. The results predict that FMO5 acts by stimulating the NRF2, XBP1, PPARA and PPARG regulatory pathways, while inhibiting STAT1 and IRF7 pathways.
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Affiliation(s)
- Ian R. Phillips
- Department of Structural and Molecular Biology, University College London, London, United Kingdom
- School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom
| | - Sunil Veeravalli
- Department of Structural and Molecular Biology, University College London, London, United Kingdom
| | - Sanjay Khadayate
- MRC London Institute of Medical Sciences (LMS), London, United Kingdom
| | - Elizabeth A. Shephard
- Department of Structural and Molecular Biology, University College London, London, United Kingdom
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9
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Guo F, Tian Y, Ji S, Min H, Ding W, Yu H, Li Y, Ji L. Environmental biotransformation mechanisms by flavin-dependent monooxygenase: A computational study. CHEMOSPHERE 2023; 325:138403. [PMID: 36921778 DOI: 10.1016/j.chemosphere.2023.138403] [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: 12/16/2022] [Revised: 03/01/2023] [Accepted: 03/12/2023] [Indexed: 06/18/2023]
Abstract
The enzyme-catalyzed metabolic biotransformation of xenobiotics plays a significant role in toxicology evolution and subsequently environmental health risk assessment. Recent studies noted that the phase I human flavin-dependent monooxygenase (e.g., FMO3) can catalyze xenobiotics into more toxic metabolites. However, details of the metabolic mechanisms are insufficient. To fill the mechanism in the gaps, the systemic density functional theory calculations were performed to elucidate diverse FMO-catalyzed oxidation reactions toward environmental pollutants, including denitrification (e.g., nitrophenol), N-oxidation (e.g., nicotine), desulfurization (e.g., fonofos), and dehalogenation (e.g., pentachlorophenol). Similar to the active center compound 0 of cytochrome P450, FMO mainly catalyzed reactions with the structure of the tricyclic isoalloxazine C-4a-hydroperoxide (FADHOOH). As will be shown, FMO-catalyzed pathways are more favorable with a concerted than stepwise mechanism; Deprotonation is necessary to initiate the oxidation reactions for phenolic substrates; The regioselectivity of nicotine by FMO prefers the N-oxidation other than N-demethylation pathway; Formation of the P-S-O triangle ring is the key step for desulfurization of fonofos by FMO. We envision that these fundamental mechanisms catalyzed by FMO with a computational method can be extended to other xenobiotics of similar structures, which may aid the high-throughput screening and provide theoretical predictions in the future.
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Affiliation(s)
- Fangjie Guo
- Quality and Safety Engineering Institute of Food and Drug, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Yilin Tian
- College of Environmental and Resource Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China
| | - Shujing Ji
- College of Environmental and Resource Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China
| | - Hao Min
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Daxue Road 1, Xuzhou 221116, China
| | - Wen Ding
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Daxue Road 1, Xuzhou 221116, China
| | - Haiying Yu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Yingqi Li
- Zhejiang University-University of Edinburgh Institute (ZJU-UoE Institute), Zhejiang University School of Medicine, International Campus, Zhejiang University, 718 East Haizhou Road, Haining 314400, China
| | - Li Ji
- College of Environmental and Resource Sciences, Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China; School of Environment Science and Spatial Informatics, China University of Mining and Technology, Daxue Road 1, Xuzhou 221116, China.
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10
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Sharma S, Singh DK, Mettu VS, Yue G, Ahire D, Basit A, Heyward S, Prasad B. Quantitative Characterization of Clinically Relevant Drug-Metabolizing Enzymes and Transporters in Rat Liver and Intestinal Segments for Applications in PBPK Modeling. Mol Pharm 2023; 20:1737-1749. [PMID: 36791335 DOI: 10.1021/acs.molpharmaceut.2c00950] [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: 02/17/2023]
Abstract
Rats are extensively used as a preclinical model for assessing drug pharmacokinetics (PK) and tissue distribution; however, successful translation of the rat data requires information on the differences in drug metabolism and transport mechanisms between rats and humans. To partly fill this knowledge gap, we quantified clinically relevant drug-metabolizing enzymes and transporters (DMETs) in the liver and different intestinal segments of Sprague-Dawley rats. The levels of DMET proteins in rats were quantified using the global proteomics-based total protein approach (TPA) and targeted proteomics. The abundance of the major DMET proteins was largely comparable using quantitative global and targeted proteomics. However, global proteomics-based TPA was able to detect and quantify a comprehensive list of 66 DMET proteins in the liver and 37 DMET proteins in the intestinal segments of SD rats without the need for peptide standards. Cytochrome P450 (Cyp) and UDP-glycosyltransferase (Ugt) enzymes were mainly detected in the liver with the abundance ranging from 8 to 6502 and 74 to 2558 pmol/g tissue. P-gp abundance was higher in the intestine (124.1 pmol/g) as compared to that in the liver (26.6 pmol/g) using the targeted analysis. Breast cancer resistance protein (Bcrp) was most abundant in the intestinal segments, whereas organic anion transporting polypeptides (Oatp) 1a1, 1a4, 1b2, and 2a1 and multidrug resistance proteins (Mrp) 2 and 6 were predominantly detected in the liver. To demonstrate the utility of these data, we modeled digoxin PK by integrating protein abundance of P-gp and Cyp3a2 into a physiologically based PK (PBPK) model constructed using PK-Sim software. The model was able to reliably predict the systemic as well as tissue concentrations of digoxin in rats. These findings suggest that proteomics-informed PBPK models in preclinical species can allow mechanistic PK predictions in animal models including tissue drug concentrations.
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Affiliation(s)
- Sheena Sharma
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202, United States
| | - Dilip K Singh
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202, United States
| | - Vijay S Mettu
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202, United States
| | - Guihua Yue
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202, United States
| | - Deepak Ahire
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202, United States
| | - Abdul Basit
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202, United States
| | | | - Bhagwat Prasad
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202, United States
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11
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Principi L, Ferrini E, Ciccimarra R, Pagani L, Chinello C, Previtali P, Smith A, Villetti G, Zoboli M, Ravanetti F, Stellari FF, Magni F, Piga I. Proteomic Fingerprint of Lung Fibrosis Progression and Response to Therapy in Bleomycin-Induced Mouse Model. Int J Mol Sci 2023; 24:ijms24054410. [PMID: 36901840 PMCID: PMC10002924 DOI: 10.3390/ijms24054410] [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: 12/02/2022] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/25/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease characterized by the aberrant accumulation of extracellular matrix in the lungs. nintedanib is one of the two FDA-approved drugs for IPF treatment; however, the exact pathophysiological mechanisms of fibrosis progression and response to therapy are still poorly understood. In this work, the molecular fingerprint of fibrosis progression and response to nintedanib treatment have been investigated by mass spectrometry-based bottom-up proteomics in paraffin-embedded lung tissues from bleomycin-induced (BLM) pulmonary fibrosis mice. Our proteomics results unveiled that (i) samples clustered depending on the tissue fibrotic grade (mild, moderate, and severe) and not on the time course after BLM treatment; (ii) the dysregulation of different pathways involved in fibrosis progression such as the complement coagulation cascades, advanced glycation end products (AGEs) and their receptors (RAGEs) signaling, the extracellular matrix-receptor interaction, the regulation of actin cytoskeleton, and ribosomes; (iii) Coronin 1A (Coro1a) as the protein with the highest correlation when evaluating the progression of fibrosis, with an increased expression from mild to severe fibrosis; and (iv) a total of 10 differentially expressed proteins (padj-value ≤ 0.05 and Fold change ≤-1.5 or ≥1.5), whose abundance varied in the base of the severity of fibrosis (mild and moderate), were modulated by the antifibrotic treatment with nintedanib, reverting their trend. Notably, nintedanib significantly restored lactate dehydrogenase B (Ldhb) expression but not lactate dehydrogenase A (Ldha). Notwithstanding the need for further investigations to validate the roles of both Coro1a and Ldhb, our findings provide an extensive proteomic characterization with a strong relationship with histomorphometric measurements. These results unveil some biological processes in pulmonary fibrosis and drug-mediated fibrosis therapy.
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Affiliation(s)
- Lucrezia Principi
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Erica Ferrini
- Department of Veterinary Science, University of Parma, 43122 Parma, Italy
| | - Roberta Ciccimarra
- Department of Veterinary Science, University of Parma, 43122 Parma, Italy
| | - Lisa Pagani
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Clizia Chinello
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Paolo Previtali
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Andrew Smith
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Gino Villetti
- Experimental Pharmacology & Translational Science Department, Chiesi Farmaceutici S.p.A., 43122 Parma, Italy
| | - Matteo Zoboli
- Department of Veterinary Science, University of Parma, 43122 Parma, Italy
| | | | - Franco Fabio Stellari
- Experimental Pharmacology & Translational Science Department, Chiesi Farmaceutici S.p.A., 43122 Parma, Italy
- Correspondence: (F.F.S.); (I.P.)
| | - Fulvio Magni
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
| | - Isabella Piga
- Clinical Proteomics and Metabolomics Unit, Department of Medicine and Surgery, University of Milano-Bicocca, 20854 Monza, Italy
- Correspondence: (F.F.S.); (I.P.)
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12
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The role of gut-dependent molecule trimethylamine N-oxide as a novel target for the treatment of chronic kidney disease. Int Urol Nephrol 2023:10.1007/s11255-023-03500-9. [PMID: 36797553 DOI: 10.1007/s11255-023-03500-9] [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: 11/04/2020] [Accepted: 01/09/2023] [Indexed: 02/18/2023]
Abstract
Trimethylamine N-oxide (TMAO) is an intestinal uremic toxin molecule mainly excreted by the kidney. Therefore, the plasma TMAO concentration is significantly increased in chronic kidney disease (CKD) patients, and plasma TMAO can be cleared by dialysis. Furthermore, TMAO damage the kidney mainly through three mechanisms: oxidative stress, inflammation and endoplasmic reticulum stress. Clinical experiments have indicated that higher TMAO levels are strongly related to the elevated incidence and mortality of cardiovascular (CV) events in CKD patients. Moreover, experimental data have shown that high levels of TMAO directly aggravate atherosclerosis, thrombosis and enhance myocardial contractility, resulting in myocardial ischemia and stroke. Specially, there are currently four potential ways to reduce blood TMAO concentration or block the effect of TMAO, including reducing the intake of trimethylamine (TMA) precursors in the diet, regulating the intestinal flora to reduce TMA production, interrupting the role of flavin-dependent monooxygenase isoforms (FMOs) to reduce the generation of TMAO, and blocking the TMAO receptor protein kinase R-like endoplasmic reticulum kinase (PERK). We hope that more clinical studies and clinicians will focus on clinical treatment to reduce the concentration of TMAO and alleviate renal damage.
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13
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Medication with fenbendazole in feed: plasma concentrations and effects on hepatic xenobiotic metabolizing enzymes in swine. Vet Res Commun 2022; 47:803-815. [DOI: 10.1007/s11259-022-10041-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 11/18/2022] [Indexed: 12/24/2022]
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14
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Öeren M, Walton PJ, Suri J, Ponting DJ, Hunt PA, Segall MD. Predicting Regioselectivity of AO, CYP, FMO, and UGT Metabolism Using Quantum Mechanical Simulations and Machine Learning. J Med Chem 2022; 65:14066-14081. [PMID: 36239985 DOI: 10.1021/acs.jmedchem.2c01303] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Unexpected metabolism in modification and conjugation phases can lead to the failure of many late-stage drug candidates or even withdrawal of approved drugs. Thus, it is critical to predict the sites of metabolism (SoM) for enzymes, which interact with drug-like molecules, in the early stages of the research. This study presents methods for predicting the isoform-specific metabolism for human AOs, FMOs, and UGTs and general CYP metabolism for preclinical species. The models use semi-empirical quantum mechanical simulations, validated using experimentally obtained data and DFT calculations, to estimate the reactivity of each SoM in the context of the whole molecule. Ligand-based models, trained and tested using high-quality regioselectivity data, combine the reactivity of the potential SoM with the orientation and steric effects of the binding pockets of the different enzyme isoforms. The resulting models achieve κ values of up to 0.94 and AUC of up to 0.92.
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Affiliation(s)
- Mario Öeren
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge CB25 9GL, U.K
| | - Peter J Walton
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge CB25 9GL, U.K.,School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - James Suri
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge CB25 9GL, U.K.,School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K
| | - David J Ponting
- Lhasa Limited, Granary Wharf House, 2 Canal Wharf, Leeds LS11 5PS, U.K
| | - Peter A Hunt
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge CB25 9GL, U.K
| | - Matthew D Segall
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge CB25 9GL, U.K
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15
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Coding Variants of the FMO3 Gene Are Associated with the Risk of Chronic Kidney Disease: A Case-Control Study. Rep Biochem Mol Biol 2022; 11:430-439. [PMID: 36718298 PMCID: PMC9883036 DOI: 10.52547/rbmb.11.3.430] [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: 04/23/2022] [Accepted: 05/08/2022] [Indexed: 01/19/2023]
Abstract
Background Chronic kidney disease (CKD) is a global health concern involving roughly one-tenth of developed countries' populations. The flavin-containing dimethylaniline monooxygenase 3 (FMO3) gene encodes an enzyme that catalyzes trimethylamine N-oxide (TMAO), a toxin in CKD sufferers. This preliminary study aims to evaluate the association between coding region variations of FMO3, rs2266782G/A (E158K), rs2266780A/G (E308G), and rs1736557G/A (V257M), and the susceptibility to CKD. Methods A total of 356 participants were enrolled, including 157 patients diagnosed with CKD and 199 age-matched healthy individuals. Genotyping of FMO3 gene variations was performed via PCR-RFLP and ARMS-PCR methods. Results Our findings revealed a significant association between rs2266780A/G and rs1736557G/A and CKD under different genetic models. Compared to the GGG haplotype of rs2266782/rs1736557/rs2266780, the GAG, GAA, AAG, and AAA haplotype combinations conferred an increased risk of CKD in our population. Interaction analysis revealed that some genotype combinations, including GA/AA/AA, AA/AA/AA, GA/AA/GA, and GG/AG/AA, dramatically increased CKD risk in the Iranian population. No correlation was found between FMO3 polymorphisms and CKD stages. Discussion These observations highlight the potential impact of coding variants of the FMO3 gene on the onset of CKD. Further investigations into expanded populations and diverse races are needed to confirm our findings.
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16
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Gausi K, Chirehwa M, Ignatius EH, Court R, Sun X, Moran L, Hafner R, Wiesner L, Rosenkranz SL, de Jager V, de Vries N, Harding J, Gumbo T, Swindells S, Diacon A, Dooley KE, McIlleron H, Denti P. Pharmacokinetics of standard versus high-dose isoniazid for treatment of multidrug-resistant tuberculosis. J Antimicrob Chemother 2022; 77:2489-2499. [PMID: 35678468 PMCID: PMC10146925 DOI: 10.1093/jac/dkac188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 05/13/2022] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND The WHO-endorsed shorter-course regimen for MDR-TB includes high-dose isoniazid. The pharmacokinetics of high-dose isoniazid within MDR-TB regimens has not been well described. OBJECTIVES To characterize isoniazid pharmacokinetics at 5-15 mg/kg as monotherapy or as part of the MDR-TB treatment regimen. METHODS We used non-linear mixed-effects modelling to evaluate the combined data from INHindsight, a 7 day early bactericidal activity study with isoniazid monotherapy, and PODRtb, an observational study of patients on MDR-TB treatment including terizidone, pyrazinamide, moxifloxacin, kanamycin, ethionamide and/or isoniazid. RESULTS A total of 58 and 103 participants from the INHindsight and PODRtb studies, respectively, were included in the analysis. A two-compartment model with hepatic elimination best described the data. N-acetyltransferase 2 (NAT2) genotype caused multi-modal clearance, and saturable first-pass was observed beyond 10 mg/kg dosing. Saturable isoniazid kinetics predicted an increased exposure of approximately 50% beyond linearity at 20 mg/kg dosing. Participants treated with the MDR-TB regimen had a 65.6% lower AUC compared with participants on monotherapy. Ethionamide co-administration was associated with a 29% increase in isoniazid AUC. CONCLUSIONS Markedly lower isoniazid exposures were observed in participants on combination MDR-TB treatment compared with monotherapy. Isoniazid displays saturable kinetics at doses >10 mg/kg. The safety implications of these phenomena remain unclear.
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Affiliation(s)
- Kamunkhwala Gausi
- Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa
| | - Maxwell Chirehwa
- Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa
| | | | - Richard Court
- Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa
- Wellcome Centre for Infectious Diseases Research in Africa (CIDRI-Africa), Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Xin Sun
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Laura Moran
- Social & Scientific Systems, a DLH Company, Silver Spring, MD, USA
| | - Richard Hafner
- Division of AIDS, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Lubbe Wiesner
- Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa
| | | | | | | | | | - Tawanda Gumbo
- Center for Infectious Diseases Research and Experimental Therapeutics, Baylor Research Institute, Baylor University Medical Center, Dallas, TX, USA
| | - Susan Swindells
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | | | - Kelly E Dooley
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Helen McIlleron
- Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa
- Wellcome Centre for Infectious Diseases Research in Africa (CIDRI-Africa), Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Paolo Denti
- Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa
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17
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Li X, Lai F, Jiang Z, Li M, Chen Z, Cheng J, Cui H, Wen F. Effects of inflammation on voriconazole levels: a systematic review. Br J Clin Pharmacol 2022; 88:5166-5182. [PMID: 35973037 DOI: 10.1111/bcp.15495] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 08/01/2022] [Accepted: 08/09/2022] [Indexed: 11/30/2022] Open
Abstract
AIMS This study aimed to review the studies evaluating the effect of the inflammatory state on voriconazole (VRZ) levels. METHODS The study included randomized clinical trials, cohort studies, and case-control studies that focused on the influence of the inflammatory state on VRZ levels. Following the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines, relevant articles published until 2021 were searched in several databases, including PubMed, Embase, Web of Science, and the Cochrane Library. RESULTS Twenty studies were included in this review, of which 15 described adult populations, 3 described pediatric populations, and 2 included both adult and pediatric populations. Seventeen studies used C-reactive protein (CRP) as an indicator of inflammation, 6 described a dose-response relationship for the effect of inflammation represented by CRP on VRZ concentrations, and 4 examined the effect of CRP on the metabolic rate of VRZ. CONCLUSIONS Our findings showed that the level of inflammation can significantly affect VRZ levels. However, the effect of inflammation on VRZ concentrations in children is controversial and must be analyzed along with age. Clinicians dosing VRZ should take into account the patient's inflammatory state. The impact of inflammation on genotype-based dosing decisions requires further study to explain the high pharmacokinetic variability of VRZ.
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Affiliation(s)
- Xuejuan Li
- Shenzhen Children's Hospital of China Medical University, Shenzhen, China.,Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, China
| | - Fangyuan Lai
- Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, China
| | - Zhaohui Jiang
- Department of Oncology, Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Meng Li
- Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, China
| | - Zebin Chen
- Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, China
| | - Junjie Cheng
- Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, China
| | - Hao Cui
- Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, China
| | - Feiqiu Wen
- Shenzhen Children's Hospital of China Medical University, Shenzhen, China
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18
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Veeravalli S, Varshavi D, Scott FH, Varshavi D, Pullen FS, Veselkov K, Phillips IR, Everett JR, Shephard EA. Treatment of wild-type mice with 2,3-butanediol, a urinary biomarker of Fmo5 -/- mice, decreases plasma cholesterol and epididymal fat deposition. Front Physiol 2022; 13:859681. [PMID: 36003643 PMCID: PMC9393927 DOI: 10.3389/fphys.2022.859681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 07/11/2022] [Indexed: 11/25/2022] Open
Abstract
We previously showed that Fmo5 -/- mice exhibit a lean phenotype and slower metabolic ageing. Their characteristics include lower plasma glucose and cholesterol, greater glucose tolerance and insulin sensitivity, and a reduction in age-related weight gain and whole-body fat deposition. In this paper, nuclear magnetic resonance (NMR) spectroscopy-based metabolite analyses of the urine of Fmo5 -/- and wild-type mice identified two isomers of 2,3-butanediol as discriminating urinary biomarkers of Fmo5 -/- mice. Antibiotic-treatment of Fmo5 -/- mice increased plasma cholesterol concentration and substantially reduced urinary excretion of 2,3-butanediol isomers, indicating that the gut microbiome contributed to the lower plasma cholesterol of Fmo5 -/- mice, and that 2,3-butanediol is microbially derived. Short- and long-term treatment of wild-type mice with a 2,3-butanediol isomer mix decreased plasma cholesterol and epididymal fat deposition but had no effect on plasma concentrations of glucose or insulin, or on body weight. In the case of long-term treatment, the effects were maintained after withdrawal of 2,3-butanediol. Short-, but not long-term treatment, also decreased plasma concentrations of triglycerides and non-esterified fatty acids. Fecal transplant from Fmo5 -/- to wild-type mice had no effect on plasma cholesterol, and 2,3-butanediol was not detected in the urine of recipient mice, suggesting that the microbiota of the large intestine was not the source of 2,3-butanediol. However, 2,3-butanediol was detected in the stomach of Fmo5 -/- mice, which was enriched for Lactobacillus genera, known to produce 2,3-butanediol. Our results indicate a microbial contribution to the phenotypic characteristic of Fmo5 -/- mice of decreased plasma cholesterol and identify 2,3-butanediol as a potential agent for lowering plasma cholesterol.
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Affiliation(s)
- Sunil Veeravalli
- Department of Structural and Molecular Biology, University College London, London, United Kingdom
| | - Dorsa Varshavi
- Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, United Kingdom
| | - Flora H. Scott
- Department of Structural and Molecular Biology, University College London, London, United Kingdom
| | - Dorna Varshavi
- Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, United Kingdom
| | - Frank S. Pullen
- Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, United Kingdom
| | - Kirill Veselkov
- Department of Surgery and Cancer, Faculty of Medicine, Imperial College, London, United Kingdom
| | - Ian R. Phillips
- Department of Structural and Molecular Biology, University College London, London, United Kingdom
- School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom
| | - Jeremy R. Everett
- Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, United Kingdom
| | - Elizabeth A. Shephard
- Department of Structural and Molecular Biology, University College London, London, United Kingdom
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19
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Li C, Horton JK, Sale M, Curd L, Goti V, Tao W, Beelen A. Pharmacokinetic Drug-Drug Interaction Studies Between Trilaciclib and Midazolam, Metformin, Rifampin, Itraconazole, and Topotecan in Healthy Volunteers and Patients with Extensive-Stage Small-Cell Lung Cancer. Clin Drug Investig 2022; 42:679-692. [PMID: 35842567 PMCID: PMC9338108 DOI: 10.1007/s40261-022-01179-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/21/2022] [Indexed: 11/26/2022]
Abstract
Background and Objective Trilaciclib is a cyclin-dependent kinase 4/6 inhibitor indicated to decrease the incidence of chemotherapy-induced myelosuppression in patients with extensive-stage small-cell lung cancer. Trilaciclib is a substrate and time-dependent inhibitor of cytochrome P450 3A4 and an inhibitor of multidrug and toxin extrusion 1, multidrug and toxin extrusion 2-K, organic cation transporter 1, and organic cation transporter 2. Here, we investigate the pharmacokinetic drug–drug interaction potential of trilaciclib. Methods Two phase I studies were conducted as prospective, open-label, fixed-sequence drug–drug interaction studies in healthy subjects (n = 57, n = 20) to investigate potential interactions between intravenously administered trilaciclib (200 or 240 mg/m2) and orally administered midazolam (5 mg), metformin (1000 mg), itraconazole (200 mg), and rifampin (600 mg). A population pharmacokinetic model was fit to phase Ib/IIa data in patients with extensive-stage small-cell lung cancer (n = 114) to assess the impact of trilaciclib dose and exposure (area under the plasma concentration–time curve) on topotecan clearance. Results Coadministration with trilaciclib had minimal effects on the exposure (area under the plasma concentration–time curve from time 0 to infinity) of midazolam (geometric least-square mean ratio [GMR] vs midazolam alone 1.065; 90% confidence interval [CI] 0.984–1.154) but statistically significantly increased plasma exposure (GMR 1.654; 90% CI 1.472–1.858) and decreased renal clearance (GMR 0.633; 90% CI 0.572–0.701) of metformin. Coadministration of trilaciclib with rifampin or itraconazole decreased trilaciclib area under the plasma concentration–time curve from time 0 to infinity by 17.3% (GMR 0.827; 90% CI 0.785–0.871) and 14.0% (GMR 0.860; 0.820–0.902), respectively, vs trilaciclib alone. Population pharmacokinetic modeling showed no significant effect of trilaciclib on topotecan clearance. Conclusions Overall, the drug–drug interaction and safety profiles of trilaciclib in these studies support its continued use in patients with extensive-stage small-cell lung cancer. Clinical Trial Registration Study 106: EudraCT number: 2019-002303-18; Study 114: not applicable; Study 03: Clinicaltrials.org: NCT02514447; August 2015. Supplementary Information The online version contains supplementary material available at 10.1007/s40261-022-01179-x.
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Affiliation(s)
- Chao Li
- G1 Therapeutics, Inc., 700 Park Offices Dr Ste 200, Research Triangle Park, NC, 27709, USA
- Fosun Pharma USA, Inc., Lexington, MA, USA
| | - Janet K Horton
- G1 Therapeutics, Inc., 700 Park Offices Dr Ste 200, Research Triangle Park, NC, 27709, USA
| | | | | | - Vineet Goti
- Nuventra, LLC., Durham, NC, USA
- Bristol Myers Squibb, Lawrenceville, NJ, USA
| | - Wenli Tao
- G1 Therapeutics, Inc., 700 Park Offices Dr Ste 200, Research Triangle Park, NC, 27709, USA
- , Cary, NC, USA
| | - Andrew Beelen
- G1 Therapeutics, Inc., 700 Park Offices Dr Ste 200, Research Triangle Park, NC, 27709, USA.
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20
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Fan L, Li Y, Zhang X, Wu Y, Song Y, Zhang F, Zhang J, Sun H. Time-resolved proteome and transcriptome of paraquat-induced pulmonary fibrosis. Pulm Pharmacol Ther 2022; 75:102145. [PMID: 35817254 DOI: 10.1016/j.pupt.2022.102145] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/31/2022] [Accepted: 07/05/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUNDS Pulmonary fibrosis (PF) is a pathological state presenting at the progressive stage of heterogeneous interstitial lung disease (ILD). The current understanding of the molecular mechanisms involved is incomplete. This clinical toxicology study focused on the pulmonary fibrosis induced by paraquat (PQ), a widely-used herbicide. Using proteo-transcriptome analysis, we identified differentially expressed proteins (DEPs) derived from the initial development of fibrosis to the dissolved stage and provided further functional analysis. METHODS We established a mouse model of progressive lung fibrosis via intratracheal instillation of paraquat. To acquire a comprehensive and unbiased understanding of the onset of pulmonary fibrosis, we performed time-series proteomics profiling (iTRAQ) and RNA sequencing (RNA-Seq) on lung samples from paraquat-treated mice and saline control. The biological functions and pathways involved were evaluated through Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) Pathway analysis. Correlation tests were conducted on comparable groups 7 days and 28 days post-exposure. Differentially expressed proteins and genes following the same trend on the protein and mRNA levels were selected for validation. The functions of the selected molecules were identified in vitro. The protein level was overexpressed by transfecting gene-containing plasmid or suppressed by transfecting specific siRNA in A549 cells. The levels of endothlial-mesenchymal transition (EMT) markers, including E-cadherin, vimentin, FN1, and α-SMA, were determined via western blot to evaluate the fibrotic process. RESULTS We quantified 1358 DEPs on day 7 and 426 DEPs on day 28 post exposure (Fold change >1.2; Q value < 0.05). The top 5 pathways - drug metabolism-cytochrome P450, metabolism of xenobiotics by cytochrome P450, complement and coagulation cascades, chemical carcinogenesis, protein digestion and absorption - were involved on both day 7 and day 28. Several pathways, including tight junction, focal adhesion, platelet activation, and ECM-receptor interaction, were more enriched on day 28 than on day 7. Integrative analysis of the proteome and transcriptome revealed a moderate correlation of quantitative protein abundance ratios with RNA abundance ratios (Spearman R = 0.3950 and 0.2477 on days 7 and 28, respectively), indicating that post-transcriptional regulation plays an important role in lung injury and repair. Western blot identified that the protein expressions of FN1, S100A4, and RBM3 were significantly upregulated while that of CYP1A1, FMO3, and PGDH were significantly downregulated on day 7. All proteins generally recovered to baseline on day 28. qPCR showed the mRNA levels of Fn1, S100a4, Rbm3, Cyp1a1, Fmo3, and Hpgd changed following the same trend as the levels of their respective proteins. Further, in vitro experiments showed that RBM3 was upregulated while PGDH was downregulated in an EMT model established in human lung epithelial A549 cells. RBM3 overexpression and PGDH knockout could both induce EMT in A549 cells. RBM3 knockout or PGDH overexpression had no reverse effect on EMT in A549 cells. CONCLUSIONS Our proteo-transcriptomic study determined the proteins responsible for fibrogenesis and uncovers their dynamic regulation from lung injury to repair, providing new insights for the development of biomarkers for diagnosis and treatment of fibrotic diseases.
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Affiliation(s)
- Lu Fan
- Department of Emergency, Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China; Department of Emergency, Clinical Medical College, Yangzhou University, Yangzhou, PR China.
| | - Yuan Li
- Department of Emergency, Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China.
| | - Xiaomin Zhang
- Department of Emergency, The Second People's Hospital of Wuxi, Affiliated to Nanjing Medical University, Wuxi, PR China.
| | - Yuxuan Wu
- Department of Emergency, Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China.
| | - Yang Song
- Department of Emergency, Nanjing Jiangbei Hospital, Affiliated to Southeast University, Nanjing, PR China.
| | - Feng Zhang
- Department of Emergency, Jiangsu Province Hospital of Chinese Medicine, Affiliated to Nanjing University of Chinese Medicine, Nanjing, PR China.
| | - Jinsong Zhang
- Department of Emergency, Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China.
| | - Hao Sun
- Department of Emergency, Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University, Nanjing, PR China.
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21
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Czechtizky W, Su W, Ripa L, Schiesser S, Höijer A, Cox RJ. Advances in the design of new types of inhaled medicines. PROGRESS IN MEDICINAL CHEMISTRY 2022; 61:93-162. [PMID: 35753716 DOI: 10.1016/bs.pmch.2022.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Inhalation of small molecule drugs has proven very efficacious for the treatment of respiratory diseases due to enhanced efficacy and a favourable therapeutic index compared with other dosing routes. It enables targeted delivery to the lung with rapid onset of therapeutic action, low systemic drug exposure, and thereby reduced systemic side effects. An increasing number of pharmaceutical companies and biotechs are investing in new modalities-for this review defined as therapeutic molecules with a molecular weight >800Da and therefore beyond usual inhaled small molecule drug-like space. However, our experience with inhaled administration of PROTACs, peptides, oligonucleotides (antisense oligonucleotides, siRNAs, miRs and antagomirs), diverse protein scaffolds, antibodies and antibody fragments is still limited. Investigating the retention and metabolism of these types of molecules in lung tissue and fluid will contribute to understanding which are best suited for inhalation. Nonetheless, the first such therapeutic molecules have already reached the clinic. This review will provide information on the physiology of healthy and diseased lungs and their capacity for drug metabolism. It will outline the stability, aggregation and immunogenicity aspects of new modalities, as well as recap on formulation and delivery aspects. It concludes by summarising clinical trial outcomes with inhaled new modalities based on information available at the end of 2021.
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Affiliation(s)
- Werngard Czechtizky
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden.
| | - Wu Su
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Lena Ripa
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Stefan Schiesser
- Department of Medicinal Chemistry, Research and Early Development, Respiratory & Immunology, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
| | - Andreas Höijer
- Cardiovascular, Renal & Metabolism CMC Projects, Pharmaceutical Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Rhona J Cox
- Department of Medicinal Chemistry, Research and Early Development, Cardiovascular, Renal & Metabolism, BioPharmaceuticals R&D, AstraZeneca, Mölndal, Sweden
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22
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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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23
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Wang S, Ma Y, Li Y, Ge X, Lu C, Cai C, Yang Y, Zhao Y, Liang G, Guo X, Cao G, Li B, Gao P. Long non-coding RNAs in <i>Sus scrofa</i> ileum under starvation stress. Anim Biosci 2022; 35:975-988. [PMID: 35240026 PMCID: PMC9271390 DOI: 10.5713/ab.21.0483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 02/04/2022] [Indexed: 11/27/2022] Open
Abstract
Objective In this study, we aimed to identify long non-coding RNAs (lncRNAs) that play important roles in starvation stress, analyze their functions, and discover potential molecular targets to alleviate starvation stress to provide a theoretical reference for subsequent in-depth research. Methods We generated a piglet starvation stress animal model. Nine Yorkshire weaned piglets were randomly divided into a long-term starvation stress group (starved for 72 h), short-term starvation stress group (starved for 48 h), and the control group. LncRNA libraries were constructed using high-throughput sequencing of piglet ileums. Results We obtained 11,792 lncRNAs, among which, 2,500 lncRNAs were novel. In total, 509 differentially expressed (DE)lncRNAs were identified in this study. Target genes of DElncRNAs were predicted via cis and trans interactions, and functional and pathway analyses were performed. Gene ontology functions and Kyoto encyclopedia of genes and genomes analysis revealed that lncRNA-targeted genes mainly participated in metabolic pathways, cellular processes, immune system processes, digestive systems, and transport activities. To reveal the mechanism underlying starvation stress, the interaction network between lncRNAs and their targets was constructed based on 26 DElncRNAs and 72 DEmRNAs. We performed an interaction network analysis of 121 DElncRNA–DEmRNA pairs with a Pearson correlation coefficient greater than 0.99. Conclusion We found that MSTRG.19894.13, MSTRG.16726.3, and MSTRG.12176.1 might play important roles in starvation stress. This study not only generated a library of enriched lncRNAs in piglets, but its outcomes also provide a strong foundation to screen key lncRNAs involved in starvation stress and a reference for subsequent in-depth research.
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24
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Kojima A, Sogabe A, Nadai M, Katoh M. Species differences in oxidative metabolism of regorafenib. Xenobiotica 2022; 51:1400-1407. [PMID: 35020558 DOI: 10.1080/00498254.2022.2028935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Despite the prevalence of laboratory animals such as monkeys, rats, and mice in clinical drug trials, we know little regarding the oxidation of regorafenib in these test subjects. This study aimed to elucidate species differences in the kinetics of regorafenib oxidation into two metabolites: regorafenib N-oxide (M-2) and hydroxyregorafenib (M-3).M-2 formation best fitted the Hill equation and showed positive cooperativity in liver and small intestinal microsomes from all species. For all species, M-2 formation had a higher maximum velocity in microsomes from the liver than the small intestines. Maximum velocity was also higher in microsomes from humans and monkeys than those from rats and mice. M-3 formation was well-fitted to the Hill equation and showed positive cooperativity in all microsomes, except those from rat small intestines, where it exhibited biphasic kinetics. At half the maximum velocity, substrate concentration for M-2 and M-3 formation was lower in microsomes from humans than from other species. Moreover, M-2 was the major metabolite in microsomes from humans, monkeys, and mice, whereas M-2 and M-3 were the major metabolites in rat microsomes.M-2 and M-3 formation involving CYP3A4 and CYP3A5 fitted to the Hill equation. However, M-3 formation involving CYP2J2 fitted to the substrate inhibition model.Our study confirmed species differences in regorafenib oxidative metabolism.
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Affiliation(s)
- Ayaka Kojima
- Department of Pharmaceutics, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Ayuka Sogabe
- Department of Pharmaceutics, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Masayuki Nadai
- Department of Pharmaceutics, Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Miki Katoh
- Department of Pharmaceutics, Faculty of Pharmacy, Meijo University, Nagoya, Japan
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25
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Park JW, Park IH, Kim JM, Noh JH, Kim KA, Park JY. Rapid detection of FMO3 single nucleotide polymorphisms using a pyrosequencing method. Mol Med Rep 2021; 25:48. [PMID: 34913068 PMCID: PMC8674696 DOI: 10.3892/mmr.2021.12564] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 11/11/2021] [Indexed: 02/02/2023] Open
Abstract
The present study aimed to develop a reliable pyrosequencing method to detect four single nucleotide polymorphisms (SNPs) of the flavin‑containing monooxygenase 3 (FMO3) gene and to compare the ethnic differences in their allelic frequencies. The pyrosequencing method was used to detect four FMO3 SNPs, namely, c.855C>T (N285N, rs909530), c.441C>T (S147S, rs1800822), c.923A>G (E308G, rs2266780) and c.472G>A (E158K, rs2266782). The allelic frequencies of these SNPs in 122 unrelated Korean subjects were as follows: i) 44.7% for c.855C>T; ii) 23.4% for c.441C>T; iii) 23.0% for c.923A>G; and iv) 27.1% for c.472G>A. Linkage disequilibrium (LD) analysis revealed that the SNPs c.923A>G and c.472G>A exhibited a strong LD (D'=0.8289, r2=0.5332). In conclusion, the pyrosequencing method developed in this study was successfully applied to detect the c.855C>T, c.441C>T, c.923A>G and c.472G>A SNPs of FMO3.
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Affiliation(s)
- Jin-Woo Park
- Department of Clinical Pharmacology and Toxicology, Korea University College of Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - In-Hwan Park
- Department of Clinical Pharmacology and Toxicology, Korea University College of Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - Jong-Min Kim
- Department of Clinical Pharmacology and Toxicology, Korea University College of Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - Ji Hyeon Noh
- Department of Clinical Pharmacology and Toxicology, Korea University College of Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - Kyoung-Ah Kim
- Department of Clinical Pharmacology and Toxicology, Korea University College of Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea
| | - Ji-Young Park
- Department of Clinical Pharmacology and Toxicology, Korea University College of Medicine, Korea University Anam Hospital, Seoul 02841, Republic of Korea
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26
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Li B, Yang S, Ye J, Chu S, Chen N, An Z. Flavin-containing monooxygenase 1 deficiency promotes neuroinflammation in dopaminergic neurons in mice. Neurosci Lett 2021; 764:136222. [PMID: 34500002 DOI: 10.1016/j.neulet.2021.136222] [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: 05/21/2021] [Revised: 08/09/2021] [Accepted: 09/02/2021] [Indexed: 10/20/2022]
Abstract
A growing body of evidence indicates an association between flavin-containing monooxygenase (FMO) and neurodegeneration, including Parkinson's disease (PD); however, the details of this association are unclear. We previously showed that the level of Fmo1 mRNA is decreased in an in vitro rotenone model of parkinsonism. To further explore the potential involvement of FMO1 deficiency in parkinsonism, we generated Fmo1 knockout (KO) mice and examined the survival of dopaminergic neurons and relative changes. Fmo1 KO mice exhibited loss of tyrosine hydroxylase-positive neurons, decreased levels of tyrosine hydroxylase and Parkin proteins, and increased levels of pro-inflammatory cytokines (IL1β and IL6) in the nigrostriatal region. Moreover, the protein levels of PTEN induced kinase 1 (PINK1) and p62, and the Microtubule associated protein 1 light chain 3 (LC3)-II/I ratio were not significantly altered in Fmo1 KO mice (P > 0.05). FMO1 deficiency promotes neuroinflammation in dopaminergic neurons in mice, thus may plays a potential pathological role in dopaminergic neuronal loss. These findings may provide new insight into the pathogenesis of PD.
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Affiliation(s)
- Boyu Li
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, 8 Gongtinan Road, Beijing 100020, China
| | - Song Yang
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, 8 Gongtinan Road, Beijing 100020, China
| | - Junrui Ye
- Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Jia2 nanwei Road, Beijing 100050, China
| | - Shifeng Chu
- Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Jia2 nanwei Road, Beijing 100050, China
| | - Naihong Chen
- Department of Pharmacology, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Jia2 nanwei Road, Beijing 100050, China.
| | - Zhuoling An
- Department of Pharmacy, Beijing Chao-Yang Hospital, Capital Medical University, 8 Gongtinan Road, Beijing 100020, China.
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27
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Non-cytochrome P450 enzymes involved in the oxidative metabolism of xenobiotics: Focus on the regulation of gene expression and enzyme activity. Pharmacol Ther 2021; 233:108020. [PMID: 34637840 DOI: 10.1016/j.pharmthera.2021.108020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 09/25/2021] [Accepted: 10/04/2021] [Indexed: 12/16/2022]
Abstract
Oxidative metabolism is one of the major biotransformation reactions that regulates the exposure of xenobiotics and their metabolites in the circulatory system and local tissues and organs, and influences their efficacy and toxicity. Although cytochrome (CY)P450s play critical roles in the oxidative reaction, extensive CYP450-independent oxidative metabolism also occurs in some xenobiotics, such as aldehyde oxidase, xanthine oxidoreductase, flavin-containing monooxygenase, monoamine oxidase, alcohol dehydrogenase, or aldehyde dehydrogenase-dependent oxidative metabolism. Drugs form a large portion of xenobiotics and are the primary target of this review. The common reaction mechanisms and roles of non-CYP450 enzymes in metabolism, factors affecting the expression and activity of non-CYP450 enzymes in terms of inhibition, induction, regulation, and species differences in pharmaceutical research and development have been summarized. These non-CYP450 enzymes are detoxifying enzymes, although sometimes they mediate severe toxicity. Synthetic or natural chemicals serve as inhibitors for these non-CYP450 enzymes. However, pharmacokinetic-based drug interactions through these inhibitors have rarely been reported in vivo. Although multiple mechanisms participate in the basal expression and regulation of non-CYP450 enzymes, only a limited number of inducers upregulate their expression. Therefore, these enzymes are considered non-inducible or less inducible. Overall, this review focuses on the potential xenobiotic factors that contribute to variations in gene expression levels and the activities of non-CYP450 enzymes.
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28
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Cheropkina H, Catucci G, Marucco A, Fenoglio I, Gilardi G, Sadeghi SJ. Human flavin-containing monooxygenase 1 and its long-sought hydroperoxyflavin intermediate. Biochem Pharmacol 2021; 193:114763. [PMID: 34509493 DOI: 10.1016/j.bcp.2021.114763] [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: 07/06/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 01/22/2023]
Abstract
Out of the five isoforms of human flavin-containing monooxygenase (hFMO), FMO1 and FMO3 are the most relevant to Phase I drug metabolism. They are involved in the oxygenation of xenobiotics including drugs and pesticides using NADPH and FAD as cofactors. Majority of the characterization of these enzymes has involved hFMO3, where intermediates of its catalytic cycle have been described. On the other hand, research efforts have so far failed in capturing the same key intermediate that is responsible for the monooxygenation activity of hFMO1. In this work we demonstrate spectrophotometrically the formation of a highly stable C4a-hydroperoxyflavin intermediate of hFMO1 upon reduction by NADPH and in the presence of O2. The measured half-life of this flavin intermediate revealed it to be stable and not fully re-oxidized even after 30 min at 15 °C in the absence of substrate, the highest stability ever observed for a human FMO. In addition, the uncoupling reactions of hFMO1 show that this enzyme is <1% uncoupled in the presence of substrate, forming small amounts of H2O2 with no observable superoxide as confirmed by EPR spin trapping experiments. This behaviour is different from hFMO3, that is shown to form both H2O2 and superoxide anion radical as a result of ∼50% uncoupling. These data are consistent with the higher stability of the hFMO1 intermediate in comparison to hFMO3. Taken together, these data demonstrate the different behaviours of these two closely related enzymes with consequences for drug metabolism as well as possible toxicity due to reactive oxygen species.
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Affiliation(s)
- Hanna Cheropkina
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | - Gianluca Catucci
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | - Arianna Marucco
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | | | - Gianfranco Gilardi
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | - Sheila J Sadeghi
- Department of Life Sciences and Systems Biology, University of Torino, Italy.
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29
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Huang F, Zhou C, Zhang XY, Shen MY, Zhang H, Wang Y, Sun L. Impact of CYP2C19 genotype on voriconazole exposure and effect of voriconazole on the activity of CYP3A in patients with haematological malignancies. Xenobiotica 2021; 51:1199-1206. [PMID: 34402388 DOI: 10.1080/00498254.2021.1969481] [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: 10/20/2022]
Abstract
Voriconazole (VRC) is a first-line drug for the treatment of invasive fungal infections (IFIs) and an inhibitor of CYP3A activity. The aims of this study are to investigate the influence of related factors on the plasma concentration of voriconazole and the effect of voriconazole on the activity of CYP3A in patients with haematological malignancies.A total of 89 patients received an initial dose of 6 mg/kg followed by 4 mg/kg every 12 h were included in the study. Blood samples were collected before and 2 h after administration for subsequent testing and for the extraction of DNA samples. Voriconazole and voriconazole N-oxide in the plasma were detected by LC-MS/MS. The effect of voriconazole on CYP3A activity was evaluated by the ratio of the endogenous biomarkers 6β-hydroxycortisol and cortisol.During the study period, the overall incidence of adverse reactions was 33.6% (with no deaths). The metabolite type of CYP2C19 and combined use of CYP2C19 enzyme inhibitors both had a significant impact on voriconazole exposure. Voriconazole has a long-lasting and potent inhibitory effect on CYP3A activity. The exposure of CYP3A substrate in combination with metabolic enzyme inhibitors voriconazole could increase. Therefore, the combination uses with voriconazole need to be considered carefully and assessed adequately.
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Affiliation(s)
- Fengru Huang
- Research Division of Clinical Pharmacology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, China
| | - Chen Zhou
- Research Division of Clinical Pharmacology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, China
| | - Xiao-Yan Zhang
- Department of Hematology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, China
| | - Miss Ye Shen
- Research Division of Clinical Pharmacology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, China
| | - Hongwen Zhang
- Research Division of Clinical Pharmacology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, China
| | - Yongqing Wang
- Research Division of Clinical Pharmacology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, China
| | - Luning Sun
- Research Division of Clinical Pharmacology, Jiangsu Province Hospital and Nanjing Medical University First Affiliated Hospital, Nanjing, China
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30
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Leitch AC, Ibrahim I, Abdelghany TM, Charlton A, Roper C, Vidler D, Palmer JM, Wilson C, Jones DE, Blain PG, Wright MC. The methylimidazolium ionic liquid M8OI is detectable in human sera and is subject to biliary excretion in perfused human liver. Toxicology 2021; 459:152854. [PMID: 34271081 PMCID: PMC8366605 DOI: 10.1016/j.tox.2021.152854] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/28/2021] [Accepted: 07/07/2021] [Indexed: 12/14/2022]
Abstract
M8OI was recently found to be contaminating the environment. M8OI was detected in the sera from 5/20 PBC patients and 1/10 controls. M8OI is taken up by human liver hepatocytes. M8OI is sequentially metabolised by CYPs followed by oxidation by dehydrogenases. The final carboxylic acid metabolite COOH7IM is, in part, excreted into human bile.
A methylimidizolium ionic liquid (M8OI) was recently found to be contaminating the environment and to be related to and/or potentially a component of an environmental trigger for the autoimmune liver disease primary biliary cholangitis (PBC). The aims of this study were to investigate human exposure to M8OI, hepatic metabolism and excretion. PBC patient and control sera were screened for the presence of M8OI. Human livers were perfused with 50μM M8OI in a closed circuit and its hepatic disposition examined. Metabolism was examined in cultured human hepatocytes and differentiated HepaRG cells by the addition of M8OI and metabolites in the range 10–100 μM. M8OI was detected in the sera from 5/20 PBC patients and 1/10 controls. In perfused livers, M8OI was cleared from the plasma with its appearance – primarily in the form of its hydroxylated (HO8IM) and carboxylated (COOH7IM) products – in the bile. Metabolism was reflected in cultured hepatocytes with HO8IM production inhibited by the cytochrome P450 inhibitor ketoconazole. Further oxidation of HO8IM to COOH7IM was sequentially inhibited by the alcohol and acetaldehyde dehydrogenase inhibitors 4-methyl pyrazole and disulfiram respectively. Hepatocytes from 1 donor failed to metabolise M8OI to COOH7IM over a 24 h period. These results demonstrate exposure to M8OI in the human population, monooxygenation by cytochromes P450 followed by alcohol and acetaldehyde dehydrogenase oxidation to a carboxylic acid that are excreted, in part, via the bile in human liver.
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Affiliation(s)
- Alistair C Leitch
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom
| | - Ibrahim Ibrahim
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom; Freeman Hospital, Newcastle upon Tyne, Tyne and Wear, NE7 7DN, United Kingdom
| | - Tarek M Abdelghany
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Kasr El-Aini St., Cairo, 11562, Egypt
| | - Alex Charlton
- School of Natural and Environmental Sciences, Bedson Building, Newcastle University, NE1 8QB, United Kingdom
| | - Clair Roper
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom
| | - Dan Vidler
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom
| | - Jeremy M Palmer
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom
| | - Colin Wilson
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom; Freeman Hospital, Newcastle upon Tyne, Tyne and Wear, NE7 7DN, United Kingdom
| | - David E Jones
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom
| | - Peter G Blain
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom
| | - Matthew C Wright
- Institute of Translation and Clinical Research, Newcastle University, Newcastle Upon Tyne, NE2 4AA, United Kingdom.
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31
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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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32
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Wegler C, Matsson P, Krogstad V, Urdzik J, Christensen H, Andersson TB, Artursson P. Influence of Proteome Profiles and Intracellular Drug Exposure on Differences in CYP Activity in Donor-Matched Human Liver Microsomes and Hepatocytes. Mol Pharm 2021; 18:1792-1805. [PMID: 33739838 PMCID: PMC8041379 DOI: 10.1021/acs.molpharmaceut.1c00053] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 01/07/2023]
Abstract
Human liver microsomes (HLM) and human hepatocytes (HH) are important in vitro systems for studies of intrinsic drug clearance (CLint) in the liver. However, the CLint values are often in disagreement for these two systems. Here, we investigated these differences in a side-by-side comparison of drug metabolism in HLM and HH prepared from 15 matched donors. Protein expression and intracellular unbound drug concentration (Kpuu) effects on the CLint were investigated for five prototypical probe substrates (bupropion-CYP2B6, diclofenac-CYP2C9, omeprazole-CYP2C19, bufuralol-CYP2D6, and midazolam-CYP3A4). The samples were donor-matched to compensate for inter-individual variability but still showed systematic differences in CLint. Global proteomics analysis outlined differences in HLM from HH and homogenates of human liver (HL), indicating variable enrichment of ER-localized cytochrome P450 (CYP) enzymes in the HLM preparation. This suggests that the HLM may not equally and accurately capture metabolic capacity for all CYPs. Scaling CLint with CYP amounts and Kpuu could only partly explain the discordance in absolute values of CLint for the five substrates. Nevertheless, scaling with CYP amounts improved the agreement in rank order for the majority of the substrates. Other factors, such as contribution of additional enzymes and variability in the proportions of active and inactive CYP enzymes in HLM and HH, may have to be considered to avoid the use of empirical scaling factors for prediction of drug metabolism.
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Affiliation(s)
- Christine Wegler
- Department
of Pharmacy, Uppsala University, 752 37 Uppsala, Sweden
- DMPK,
Research and Early Development Cardiovascular, Renal and Metabolism,
BioPharmaceuticals R&D, AstraZeneca, 431 50 Gothenburg, Sweden
| | - Pär Matsson
- Department
of Pharmacy, Uppsala University, 752 37 Uppsala, Sweden
| | - Veronica Krogstad
- Department
of Pharmaceutical Biosciences, School of Pharmacy, University of Oslo, 0315 Oslo, Norway
| | - Jozef Urdzik
- Department
of Surgical Sciences, Uppsala University, 751 85 Uppsala, Sweden
| | - Hege Christensen
- Department
of Pharmaceutical Biosciences, School of Pharmacy, University of Oslo, 0315 Oslo, Norway
| | - Tommy B. Andersson
- DMPK,
Research and Early Development Cardiovascular, Renal and Metabolism,
BioPharmaceuticals R&D, AstraZeneca, 431 50 Gothenburg, Sweden
| | - Per Artursson
- Department
of Pharmacy and Science for Life Laboratory, Uppsala University, 752 37 Uppsala, Sweden
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33
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Bailleul G, Nicoll CR, Mascotti ML, Mattevi A, Fraaije MW. Ancestral reconstruction of mammalian FMO1 enables structural determination, revealing unique features that explain its catalytic properties. J Biol Chem 2020; 296:100221. [PMID: 33759784 PMCID: PMC7948450 DOI: 10.1074/jbc.ra120.016297] [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] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 11/09/2022] Open
Abstract
Mammals rely on the oxidative flavin-containing monooxygenases (FMOs) to detoxify numerous and potentially deleterious xenobiotics; this activity extends to many drugs, giving FMOs high pharmacological relevance. However, our knowledge regarding these membrane-bound enzymes has been greatly impeded by the lack of structural information. We anticipated that ancestral-sequence reconstruction could help us identify protein sequences that are more amenable to structural analysis. As such, we hereby reconstructed the mammalian ancestral protein sequences of both FMO1 and FMO4, denoted as ancestral flavin-containing monooxygenase (AncFMO)1 and AncFMO4, respectively. AncFMO1, sharing 89.5% sequence identity with human FMO1, was successfully expressed as a functional enzyme. It displayed typical FMO activities as demonstrated by oxygenating benzydamine, tamoxifen, and thioanisole, drug-related compounds known to be also accepted by human FMO1, and both NADH and NADPH cofactors could act as electron donors, a feature only described for the FMO1 paralogs. AncFMO1 crystallized as a dimer and was structurally resolved at 3.0 Å resolution. The structure harbors typical FMO aspects with the flavin adenine dinucleotide and NAD(P)H binding domains and a C-terminal transmembrane helix. Intriguingly, AncFMO1 also contains some unique features, including a significantly porous and exposed active site, and NADPH adopting a new conformation with the 2’-phosphate being pushed inside the NADP+ binding domain instead of being stretched out in the solvent. Overall, the ancestrally reconstructed mammalian AncFMO1 serves as the first structural model to corroborate and rationalize the catalytic properties of FMO1.
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Affiliation(s)
- Gautier Bailleul
- Molecular Enzymology Group, University of Groningen, Groningen, the Netherlands
| | - Callum R Nicoll
- Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, Pavia, Italy
| | - María Laura Mascotti
- Molecular Enzymology Group, University of Groningen, Groningen, the Netherlands; IMIBIO-SL CONICET, Facultad de Química Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis, Argentina
| | - Andrea Mattevi
- Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, Pavia, Italy.
| | - Marco W Fraaije
- Molecular Enzymology Group, University of Groningen, Groningen, the Netherlands.
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Zhou Z, Liu C, Liu K, Lv M, Li B, Lan Z, Chen W, Kang M. Expression and Possible Molecular Mechanisms of microRNA-205-5p in Patients With Head and Neck Squamous Cell Carcinoma. Technol Cancer Res Treat 2020; 19:1533033820980110. [PMID: 33327871 PMCID: PMC7750893 DOI: 10.1177/1533033820980110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth most prevalent malignancy worldwide, with high incidence and poor survival rates. Increased expression of microRNA-205-5p (miR-205-5p) may influence the outcomes of HNSCC, but the identities of miR-205-5p target genes and the potential signaling pathways related to HNSCC remain unclear. RT-qPCR was used to detect the expression levels of miR-205-5p in the plasma of patients with HNSCC. We also performed a meta-analysis using data from relevant literature, and the Gene Expression Omnibus (GEO) and the Cancer Genome Atlas (TCGA) databases to evaluate the expression level of miR-205-5p in HNSCC. Next, we predicted the potential miR-205-5p target genes in HNSCC. We also used Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) for enrichment analyses adapted to investigate the dynamics and possible mechanisms of miR-205-5p in HNSCC. Lastly, we predicted the potential miR-205-5p target genes by evaluating their expression level and using Spearman analysis. Expression of miR-205-5p was higher in HNSCC tissues compared to normal unafflicted tissue samples (P < 0.05), and the corresponding summary receiver operating characteristic (sROC) was 0.82.The pooled sensitivity, specificity, PLR, NLR, and DOR values were 0.78 (95% CI: 0.75-0.81), 0.67 (95% CI: 0.60-0.73), 2.34 (95% CI: 1.45-3.76), 0.34 (95% CI: 0.19-0.60), and 8.16 (95% CI: 4.01-16.64), respectively. Based on GO and KEGG analyses, we found that miR-205-5p was correlated with the progression of HNSCC through association with signaling pathways, including the drug metabolism-cytochrome P450 pathway. Analysis of the target genes revealed that flavin-containing monooxygenase isoform 2 (FMO2) and alcohol dehydrogenase 1B (ADH1B) may be important targets of miR-205-5p. In summary, miR-205-5p may have a significant role in the prognosis of HNSCC and may serve as a potential biomarker in HNSCC.
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Affiliation(s)
- Ziyan Zhou
- Department of Radiation Oncology, 117742The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China.,Guangxi Tumor Radiation Therapy Clinical Medical Research Center, Nanning, Guangxi, People's Republic of China
| | - Chang Liu
- 74626Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Kang Liu
- Department of Radiation Oncology, 117742The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China.,Guangxi Tumor Radiation Therapy Clinical Medical Research Center, Nanning, Guangxi, People's Republic of China
| | - Meixin Lv
- 74626Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Baibei Li
- 74626Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Zhenrui Lan
- 74626Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Wei Chen
- Department of Radiation Oncology, 117742The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China.,Guangxi Tumor Radiation Therapy Clinical Medical Research Center, Nanning, Guangxi, People's Republic of China
| | - Min Kang
- Department of Radiation Oncology, 117742The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China.,Guangxi Tumor Radiation Therapy Clinical Medical Research Center, Nanning, Guangxi, People's Republic of China
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35
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Carvalho Henriques B, Yang EH, Lapetina D, Carr MS, Yavorskyy V, Hague J, Aitchison KJ. How Can Drug Metabolism and Transporter Genetics Inform Psychotropic Prescribing? Front Genet 2020; 11:491895. [PMID: 33363564 PMCID: PMC7753050 DOI: 10.3389/fgene.2020.491895] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 09/25/2020] [Indexed: 12/11/2022] Open
Abstract
Many genetic variants in drug metabolizing enzymes and transporters have been shown to be relevant for treating psychiatric disorders. Associations are strong enough to feature on drug labels and for prescribing guidelines based on such data. A range of commercial tests are available; however, there is variability in included genetic variants, methodology, and interpretation. We herein provide relevant background for understanding clinical associations with specific variants, other factors that are relevant to consider when interpreting such data (such as age, gender, drug-drug interactions), and summarize the data relevant to clinical utility of pharmacogenetic testing in psychiatry and the available prescribing guidelines. We also highlight areas for future research focus in this field.
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Affiliation(s)
| | - Esther H. Yang
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
| | - Diego Lapetina
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
| | - Michael S. Carr
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
| | - Vasyl Yavorskyy
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
| | - Joshua Hague
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
| | - Katherine J. Aitchison
- Department of Psychiatry, University of Alberta, Edmonton, AB, Canada
- Department of Medical Genetics, University of Alberta, Edmonton, AB, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB, Canada
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36
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Matsumoto K, Hasegawa T, Ohara K, Kamei T, Koyanagi J, Akimoto M. Role of human flavin-containing monooxygenase (FMO) 5 in the metabolism of nabumetone: Baeyer-Villiger oxidation in the activation of the intermediate metabolite, 3-hydroxy nabumetone, to the active metabolite, 6-methoxy-2-naphthylacetic acid in vitro. Xenobiotica 2020; 51:155-166. [PMID: 33146575 DOI: 10.1080/00498254.2020.1843089] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Nabumetone (NAB) is a non-steroidal anti-inflammatory drug used clinically, and its biotransformation includes the major active metabolite 6-methoxy-2-naphthylacetic acid (6-MNA). One of the key intermediates between NAB and 6-MNA may be 3-hydroxy nabumetone (3-OH-NAB). The aim of the present study was to investigate the role of flavin-containing monooxygenase (FMO) isoform 5 in the formation of 6-MNA from 3-OH-NAB. To elucidate the biotransformation of 3-OH-NAB to 6-MNA, an authentic standard of 3-OH-NAB was synthesised and used as a substrate in an incubation with human liver samples or recombinant enzymes. The formation of 3-OH-NAB was observed after the incubation of NAB with various cytochrome P450 (CYP) isoforms. However, 6-MNA itself was rarely detected from NAB and 3-OH-NAB. Further experiments revealed a 6-MNA peak derived from 3-OH-NAB in human hepatocytes. 6-MNA was also detected in the extract obtained from 3-OH-NAB by a combined incubation of recombinant human FMO5 and human liver S9. We herein demonstrated that the reaction involves carbon-carbon cleavage catalyzed by the Baeyer-Villiger oxidation (BVO) of a carbonyl compound, the BVO substrate, such as a ketol, by FMO5. Further in vitro inhibition experiments showed that multiple non-CYP enzymes are involved in the formation of 6-MNA from 3-OH-NAB.
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Affiliation(s)
- Kaori Matsumoto
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Tetsuya Hasegawa
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Kosuke Ohara
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Tomoyo Kamei
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Junichi Koyanagi
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Masayuki Akimoto
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
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37
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Genetic toxicology and toxicokinetics of arecoline and related areca nut compounds: an updated review. Arch Toxicol 2020; 95:375-393. [PMID: 33097969 DOI: 10.1007/s00204-020-02926-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/05/2020] [Indexed: 01/13/2023]
Abstract
Areca nut (AN) is consumed by more than 600 million of individuals, particularly in some regions of South Asia, East Africa, and tropical Pacific, being classified as carcinogenic to humans. The most popular way of exposure consists of chewing a mixture of AN with betel leaf, slaked lime, and other ingredients that may also contain tobacco named betel quid (BQ). Arecoline is the principal active compound of AN, and, therefore, has been systematically studied over the years in several in vitro and in vivo genotoxicity endpoints. However, much of this information is dispersed, justifying the interest of an updated and comprehensive review article on this topic. In this sense, it is thus pertinent to describe and integrate the genetic toxicology data available as well as to address key toxicokinetics aspects of arecoline. This review also provides information on the effects induced by arecoline metabolites and related compounds, including other major AN alkaloids and nitrosation derivatives. The complexity of the chemicals involved renders this issue a challenge in genetic toxicology. Overall, positive results in several endpoints have been reported, some of them suggesting a key role for arecoline metabolites. Nevertheless, some negative genotoxicity findings for this alkaloid in short-term assays have also been reported in the literature. Finally, this article also collates information on the potential mechanisms of arecoline-induced genotoxicity, and suggests further approaches to tackle this important toxicological issue.
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38
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Perillo M, Oulhen N, Foster S, Spurrell M, Calestani C, Wessel G. Regulation of dynamic pigment cell states at single-cell resolution. eLife 2020; 9:e60388. [PMID: 32812865 PMCID: PMC7455242 DOI: 10.7554/elife.60388] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 08/15/2020] [Indexed: 12/12/2022] Open
Abstract
Cells bearing pigment have diverse roles and are often under strict evolutionary selection. Here, we explore the regulation of pigmented cells in the purple sea urchin Strongylocentrotus purpuratus, an emerging model for diverse pigment function. We took advantage of single cell RNA-seq (scRNAseq) technology and discovered that pigment cells in the embryo segregated into two distinct populations, a mitotic cluster and a post-mitotic cluster. Gcm is essential for expression of several genes important for pigment function, but is only transiently expressed in these cells. We discovered unique genes expressed by pigment cells and test their expression with double fluorescence in situ hybridization. These genes include new members of the fmo family that are expressed selectively in pigment cells of the embryonic and in the coelomic cells of the adult - both cell-types having immune functions. Overall, this study identifies nodes of molecular intersection ripe for change by selective evolutionary pressures.
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Affiliation(s)
- Margherita Perillo
- Department of Molecular and Cellular Biology Division of Biology and Medicine Brown UniversityProvidenceUnited States
| | - Nathalie Oulhen
- Department of Molecular and Cellular Biology Division of Biology and Medicine Brown UniversityProvidenceUnited States
| | - Stephany Foster
- Department of Molecular and Cellular Biology Division of Biology and Medicine Brown UniversityProvidenceUnited States
| | - Maxwell Spurrell
- Department of Molecular and Cellular Biology Division of Biology and Medicine Brown UniversityProvidenceUnited States
| | | | - Gary Wessel
- Department of Molecular and Cellular Biology Division of Biology and Medicine Brown UniversityProvidenceUnited States
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39
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Ingram CJE, Ekong R, Ansari-Pour N, Bradman N, Swallow DM. Group-based pharmacogenetic prediction: is it feasible and do current NHS England ethnic classifications provide appropriate data? THE PHARMACOGENOMICS JOURNAL 2020; 21:47-59. [PMID: 32683419 DOI: 10.1038/s41397-020-0175-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 06/15/2020] [Accepted: 07/02/2020] [Indexed: 12/11/2022]
Abstract
Inter-individual variation of drug metabolising enzymes (DMEs) leads to variable efficacy of many drugs and even adverse drug responses. Consequently, it would be desirable to test variants of many DMEs before drug treatment. Inter-ethnic differences in frequency mean that the choice of SNPs to test may vary across population groups. Here we examine the utility of testing representative groups as a way of assessing what variants might be tested. We show that publicly available population information is potentially useful for determining loci for pre-treatment genetic testing, and for determining the most prevalent risk haplotypes in defined groups. However, we also show that the NHS England classifications have limitations for grouping for these purposes, in particular for people of African descent. We conclude: (1) genotyping of hospital patients and people from the hospital catchment area confers no advantage over using samples from appropriate existing ethnic group collections or publicly available data, (2) given the current NHS England Black African grouping, a decision as to whether to test, would have to apply to all patients of recent Black African ancestry to cover reported risk alleles and (3) the current scarcity of available genome and drug effect data from Africans is a problem for both testing and treatment decisions.
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Affiliation(s)
- Catherine J E Ingram
- Research Department of Genetics, Evolution and Environment, University College London, Darwin Building, Gower Street, London, WC1E 6BT, UK
| | - Rosemary Ekong
- Research Department of Genetics, Evolution and Environment, University College London, Darwin Building, Gower Street, London, WC1E 6BT, UK
| | - Naser Ansari-Pour
- Big Data Institute, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7LF, UK
| | - Neil Bradman
- Henry Stewart Group, 40-41 Museum Street, London, WC1A 1LT, UK
| | - Dallas M Swallow
- Research Department of Genetics, Evolution and Environment, University College London, Darwin Building, Gower Street, London, WC1E 6BT, UK.
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40
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Öeren M, Walton PJ, Hunt PA, Ponting DJ, Segall MD. Predicting reactivity to drug metabolism: beyond P450s-modelling FMOs and UGTs. J Comput Aided Mol Des 2020; 35:541-555. [PMID: 32533369 DOI: 10.1007/s10822-020-00321-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/07/2020] [Indexed: 11/28/2022]
Abstract
We present a study based on density functional theory calculations to explore the rate limiting steps of product formation for oxidation by Flavin-containing Monooxygenase (FMO) and glucuronidation by the UDP-glucuronosyltransferase (UGT) family of enzymes. FMOs are responsible for the modification phase of metabolism of a wide diversity of drugs, working in conjunction with Cytochrome P450 (CYP) family of enzymes, and UGTs are the most important class of drug conjugation enzymes. Reactivity calculations are important for prediction of metabolism by CYPs and reactivity alone explains around 70-85% of the experimentally observed sites of metabolism within CYP substrates. In the current work we extend this approach to propose model systems which can be used to calculate the activation energies, i.e. reactivity, for the rate-limiting steps for both FMO oxidation and glucuronidation of potential sites of metabolism. These results are validated by comparison with the experimentally observed reaction rates and sites of metabolism, indicating that the presented models are suitable to provide the basis of a reactivity component within generalizable models to predict either FMO or UGT metabolism.
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Affiliation(s)
- Mario Öeren
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge, CB25 9PB, UK.
| | - Peter J Walton
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge, CB25 9PB, UK.,School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Peter A Hunt
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge, CB25 9PB, UK
| | - David J Ponting
- Lhasa Limited, Granary Wharf House, 2 Canal Wharf, Leeds, LS11 5PS, UK
| | - Matthew D Segall
- Optibrium Limited, Cambridge Innovation Park, Denny End Road, Cambridge, CB25 9PB, UK
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41
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Atkins WM. Mechanisms of promiscuity among drug metabolizing enzymes and drug transporters. FEBS J 2020; 287:1306-1322. [PMID: 31663687 PMCID: PMC7138722 DOI: 10.1111/febs.15116] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 10/04/2019] [Accepted: 10/29/2019] [Indexed: 12/11/2022]
Abstract
Detoxication, or 'drug-metabolizing', enzymes and drug transporters exhibit remarkable substrate promiscuity and catalytic promiscuity. In contrast to substrate-specific enzymes that participate in defined metabolic pathways, individual detoxication enzymes must cope with substrates of vast structural diversity, including previously unencountered environmental toxins. Presumably, evolution selects for a balance of 'adequate' kcat /KM values for a wide range of substrates, rather than optimizing kcat /KM for any individual substrate. However, the structural, energetic, and metabolic properties that achieve this balance, and hence optimize detoxication, are not well understood. Two features of detoxication enzymes that are frequently cited as contributions to promiscuity include the exploitation of highly reactive versatile cofactors, or cosubstrates, and a high degree of flexibility within the protein structure. This review examines these intuitive mechanisms in detail and clarifies the contributions of the classic ligand binding models 'induced fit' (IF) and 'conformational selection' (CS) to substrate promiscuity. The available literature data for drug metabolizing enzymes and transporters suggest that IF is exploited by these promiscuous detoxication enzymes, as it is with substrate-specific enzymes, but the detoxication enzymes uniquely exploit 'IFs' to retain a wide range of substrates at their active sites. In contrast, whereas CS provides no catalytic advantage to substrate-specific enzymes, promiscuous enzymes may uniquely exploit it to recruit a wide range of substrates. The combination of CS and IF, for recruitment and retention of substrates, can potentially optimize the promiscuity of drug metabolizing enzymes and drug transporters.
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Affiliation(s)
- William M. Atkins
- Department of Medicinal ChemistryUniversity of WashingtonSeattleWAUSA
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42
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Abstract
Flavin-dependent monooxygenases (FMOs) are ancient enzymes present in all kingdoms of life. FMOs typically catalyze the incorporation of an oxygen atom from molecular oxygen into small molecules. To date, the majority of functional characterization studies have been performed on mammalian, fungal and bacterial FMOs, showing that they play fundamental roles in drug and xenobiotic metabolism. By contrast, our understanding of FMOs across the plant kingdom is very limited, despite plants possessing far greater FMO diversity compared to both bacteria and other multicellular organisms. Here, we review the progress of plant FMO research, with a focus on FMO diversity and functionality. Significantly, of the FMOs characterized to date, they all perform oxygenation reactions that are crucial steps within hormone metabolism, pathogen resistance, signaling and chemical defense. This demonstrates the fundamental role FMOs have within plant metabolism, and presents significant opportunities for future research pursuits and downstream applications.
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43
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Veeravalli S, Phillips IR, Freire RT, Varshavi D, Everett JR, Shephard EA. Flavin-Containing Monooxygenase 1 Catalyzes the Production of Taurine from Hypotaurine. Drug Metab Dispos 2020; 48:378-385. [PMID: 32156684 DOI: 10.1124/dmd.119.089995] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 02/03/2020] [Indexed: 12/22/2022] Open
Abstract
Taurine is one of the most abundant amino acids in mammalian tissues. It is obtained from the diet and by de novo synthesis from cysteic acid or hypotaurine. Despite the discovery in 1954 that the oxygenation of hypotaurine produces taurine, the identification of an enzyme catalyzing this reaction has remained elusive. In large part, this is due to the incorrect assignment, in 1962, of the enzyme as an NAD-dependent hypotaurine dehydrogenase. For more than 55 years, the literature has continued to refer to this enzyme as such. Here we show, both in vivo and in vitro, that the enzyme that oxygenates hypotaurine to produce taurine is flavin-containing monooxygenase (FMO) 1. Metabolite analysis of the urine of Fmo1-null mice by 1H NMR spectroscopy revealed a buildup of hypotaurine and a deficit of taurine in comparison with the concentrations of these compounds in the urine of wild-type mice. In vitro assays confirmed that human FMO1 catalyzes the conversion of hypotaurine to taurine, utilizing either NADPH or NADH as cofactor. FMO1 has a wide substrate range and is best known as a xenobiotic- or drug-metabolizing enzyme. The identification that the endogenous molecule hypotaurine is a substrate for the FMO1-catalyzed production of taurine resolves a long-standing mystery. This finding should help establish the role FMO1 plays in a range of biologic processes in which taurine or its deficiency is implicated, including conjugation of bile acids, neurotransmitter, antioxidant and anti-inflammatory functions, and the pathogenesis of obesity and skeletal muscle disorders. SIGNIFICANCE STATEMENT: The identity of the enzyme that catalyzes the biosynthesis of taurine from hypotaurine has remained elusive. Here we show, both in vivo and in vitro, that flavin-containing monooxygenase 1 catalyzes the oxygenation of hypotaurine to produce taurine.
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Affiliation(s)
- Sunil Veeravalli
- Department of Structural and Molecular Biology, University College London, London, United Kingdom (S.V., I.R.P., E.A.S.); School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.); and Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, Kent, United Kingdom (R.T.F., D.V., J.R.E.)
| | - Ian R Phillips
- Department of Structural and Molecular Biology, University College London, London, United Kingdom (S.V., I.R.P., E.A.S.); School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.); and Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, Kent, United Kingdom (R.T.F., D.V., J.R.E.)
| | - Rafael T Freire
- Department of Structural and Molecular Biology, University College London, London, United Kingdom (S.V., I.R.P., E.A.S.); School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.); and Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, Kent, United Kingdom (R.T.F., D.V., J.R.E.)
| | - Dorsa Varshavi
- Department of Structural and Molecular Biology, University College London, London, United Kingdom (S.V., I.R.P., E.A.S.); School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.); and Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, Kent, United Kingdom (R.T.F., D.V., J.R.E.)
| | - Jeremy R Everett
- Department of Structural and Molecular Biology, University College London, London, United Kingdom (S.V., I.R.P., E.A.S.); School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.); and Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, Kent, United Kingdom (R.T.F., D.V., J.R.E.)
| | - Elizabeth A Shephard
- Department of Structural and Molecular Biology, University College London, London, United Kingdom (S.V., I.R.P., E.A.S.); School of Biological and Chemical Sciences, Queen Mary University of London, London, United Kingdom (I.R.P.); and Medway Metabonomics Research Group, University of Greenwich, Chatham Maritime, Kent, United Kingdom (R.T.F., D.V., J.R.E.)
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Zeng G, Wang L, Shi L, Li H, Zhu M, Luo J, Zhang Z. Variability of voriconazole concentrations in patients with hematopoietic stem cell transplantation and hematological malignancies: influence of loading dose, procalcitonin, and pregnane X receptor polymorphisms. Eur J Clin Pharmacol 2020; 76:515-523. [PMID: 31932875 DOI: 10.1007/s00228-020-02831-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 01/08/2020] [Indexed: 12/11/2022]
Abstract
AIMS Voriconazole (VCZ) displays highly variable pharmacokinetics affecting treatment efficacy and safety. We aimed to identify the factors affecting VCZ steady-state trough concentration (Cssmin) to provide evidence for optimizing VCZ treatment regimens. METHODS A total of 510 Cssmin of 172 patients with hematopoietic stem cell transplantation and hematologic malignancies and their clinical characteristics and genotypes of FMO, POR, and PXR were included in this study. RESULTS In univariate analysis, the standard loading dose of VCZ significantly increased the Cssmin of VCZ (P < 0.001). The Cssmin of VCZ was significantly correlated with patients' total bilirubin (TB) (P < 0.001) and procalcitonin (PCT) (P < 0.001). FMO3 rs2266780 (P = 0.025), POR rs10954732 (P = 0.015), PXR rs2461817 (P = 0.010), PXR rs7643645 (P = 0.003), PXR rs3732359 (P = 0.014), PXR rs3814057 (P = 0.005), and PXR rs6785049 (P = 0.013) have a significant effect on Cssmin of VCZ. Loading dose, TB, PCT level, and PXRrs3814057 polymorphism were independent influencing factors of VCZ Cssmin in the analysis of multivariate linear regression. And loading dose, PCT, and PXR rs3814057 had significant effects on the probability of the therapeutic window of VCZ. CONCLUSION The high variability of VCZ Cssmin may be partially explained by loading dose, liver function, inflammation, and PXR polymorphisms. This study suggests the VCZ standard loading dose regimen significantly increased Cssmin and probability of the therapeutic window providing treatment benefits. Patients in the high PCT group may be more likely to exceed 5.5 μg/mL, thus suffering from VCZ toxicity.
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Affiliation(s)
- Guangting Zeng
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Linlin Wang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lihong Shi
- Sichuan cancer hospital & institute, Chengdu, Sichuan, China
| | - Huilan Li
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Miaomiao Zhu
- Tongji Medical College, Huazhong University of Science and Technology, Wuhan Mental Health Centre; Wuhan Hospital for Psychotherapy, Wuhan, Hubei, China
| | - Jia Luo
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China.,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zanling Zhang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, Hunan, China. .,Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China.
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Phillips IR, Shephard EA. Flavin-containing monooxygenases: new structures from old proteins. Nat Struct Mol Biol 2020; 27:3-4. [DOI: 10.1038/s41594-019-0356-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Matsumoto K, Hasegawa T, Ohara K, Takei C, Kamei T, Koyanagi J, Takahashi T, Akimoto M. A metabolic pathway for the prodrug nabumetone to the pharmacologically active metabolite, 6-methoxy-2-naphthylacetic acid (6-MNA) by non-cytochrome P450 enzymes. Xenobiotica 2019; 50:783-792. [DOI: 10.1080/00498254.2019.1704097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Kaori Matsumoto
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Tetsuya Hasegawa
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Kosuke Ohara
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Chihiro Takei
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Tomoyo Kamei
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Junichi Koyanagi
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Tamiko Takahashi
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
| | - Masayuki Akimoto
- Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan
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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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Nakashima F, Schneider C. Transformation of Prostaglandin D 2 to 11-Dehydro Thromboxane B 2 by Baeyer-Villiger Oxidation. Lipids 2019; 55:73-78. [PMID: 31833075 DOI: 10.1002/lipd.12206] [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: 09/17/2019] [Revised: 11/05/2019] [Accepted: 11/15/2019] [Indexed: 11/05/2022]
Abstract
Prostaglandin D2 is one of five chief prostanoids formed in the cyclooxygenase pathway of arachidonic acid oxidation. Except for a single oxygen atom, PGD2 is structurally identical to 11-dehydro thromboxane B2 (11d-TxB2 ), a urinary metabolite of the pro-aggregatory platelet activator, thromboxane A2 . The close structural relationship suggested that one might be transformed to the other. Accordingly, we tested whether the cyclopentanone of PGD2 can be expanded to the δ-lactone of 11d-TxB2 in a Baeyer-Villiger oxidation. Oxidation of PGD2 with two standard oxidants showed that 11d-TxB2 was formed only with H2 O2 but not with peracetic acid. Byproducts of the H2 O2 -mediated oxidation were hydroperoxide derivatives and isomers of PGD2 . Chemical oxidation of PGD2 to 11d-TxB2 may be a model for an equivalent enzymatic transformation, suggesting a possible link in the metabolism of PGD2 and thromboxane A2 .
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Affiliation(s)
- Fumie Nakashima
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical School, Nashville, TN, 37232, USA
| | - Claus Schneider
- Department of Pharmacology, Division of Clinical Pharmacology, and Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical School, Nashville, TN, 37232, USA
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Abstract
Trimethylamine N-Oxide (TMAO) is the product of the monooxygenation reaction catalyzed by a drug-metabolizing enzyme, human flavin-containing monooxygenase 3 (hFMO3), and its animal orthologues. For several years, researchers have looked at TMAO and hFMO3 as two distinct molecules playing specific but separate roles, the former to defend saltwater animals from osmotic or hydrostatic stress and the latter to process xenobiotics in men. The presence of high levels of plasmatic TMAO in elasmobranchs and other animals was demonstrated a long time ago, whereas the actual physiological role of hFMO3 is still unknown because the enzyme has been mainly characterized for its ability to oxidize drugs. Recently TMAO was found to be related to several human health conditions such as atherosclerosis, cardiovascular, and renal diseases. This correlation poses a striking question of how other vertebrates (and invertebrates) can survive in the presence of very high TMAO concentrations (micromolar in humans, millimolar in marine mammals and several hundred millimolar in elasmobranchs). Therefore, it is important to address how TMAO, its precursors, and FMO catalytic activity are interconnected.
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Catucci G, Gao C, Rampolla G, Gilardi G, Sadeghi SJ. Uncoupled human flavin-containing monooxygenase 3 releases superoxide radical in addition to hydrogen peroxide. Free Radic Biol Med 2019; 145:250-255. [PMID: 31580948 DOI: 10.1016/j.freeradbiomed.2019.09.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 09/26/2019] [Accepted: 09/29/2019] [Indexed: 11/21/2022]
Abstract
Human flavin-containing monooxygenase 3 (hFMO3) is a drug-metabolizing enzyme capable of performing N- or S-oxidation using the C4a-hydroperoxy intermediate. In this work, we employ both wild type hFMO3 as well as an active site polymorphic variant (N61S) to unravel the uncoupling reactions in the catalytic cycle of this enzyme. We demonstrate that in addition to H2O2 this enzyme also produces superoxide anion radicals as its uncoupling products. The level of uncoupling was found to vary between 50 and 70% (WT) and 90-98% (N61S) for incubations with NADPH and benzydamine over a period of 5 or 20 min, respectively. For the first time, we were able to follow the production of the superoxide radical in hFMO3, which was found to account for 13-18% of the total uncoupling of this human enzyme. Moreover, measurements in the presence or absence of the substrate show that the substrate lowers the level of uncoupling only related to the H2O2 and not the superoxide radical. This is consistent with the entry point of the substrate in this enzyme's catalytic cycle. These findings highlight the importance of the involvement of hFMO3 in the production of radicals in the endoplasmic reticulum, as well as the relevance of single-nucleotide polymorphism leading to deleterious effects of oxidative stress.
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Affiliation(s)
- Gianluca Catucci
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | - Chongliang Gao
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | - Giulia Rampolla
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | - Gianfranco Gilardi
- Department of Life Sciences and Systems Biology, University of Torino, Italy
| | - Sheila J Sadeghi
- Department of Life Sciences and Systems Biology, University of Torino, Italy.
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