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Boinpally R, Borbridge L, Wangsadipura V. Pharmacokinetics and Safety of Atogepant Co-administered with Quinidine Gluconate in Healthy Participants: A Phase 1, Open-Label, Drug-Drug Interaction Study. Clin Pharmacol Drug Dev 2024; 13:930-937. [PMID: 38702918 DOI: 10.1002/cpdd.1407] [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: 01/17/2024] [Accepted: 04/03/2024] [Indexed: 05/06/2024]
Abstract
Atogepant, an oral calcitonin gene-related peptide receptor antagonist, is approved for the preventive treatment of migraine. Atogepant is a substrate of P-glycoprotein (P-gp), breast cancer resistance protein, organic anion transporting polypeptide transporters, and cytochrome P450 (CYP)3A4 and 2D6. Quinidine is a strong P-gp and CYP2D6 inhibitor. A phase 1 open-label study evaluated the effect of P-gp and CYP2D6 inhibition by quinidine on the pharmacokinetics of atogepant, and the safety and tolerability of atogepant and quinidine gluconate (QG) when co-administered and when given alone in 33 healthy adults. There was no significant change in the atogepant maximum plasma concentration with QG co-administration. The overall systemic exposure, the area under the plasma concentration-time curve (from time 0 to time t or to infinity), of atogepant increased by 25% when co-administered with QG. However, such an increase was not considered clinically relevant. Atogepant did not alter the mean plasma concentration of quinidine at steady state. The incidence of treatment-emergent adverse events (TEAEs) was highest when QG was administered alone (42.4%), which was primarily due to QT prolongation. Most TEAEs reported were mild in severity and resolved within 1-2 days. Co-administration of atogepant with QG did not result in any unexpected tolerability findings in this phase 1 study in healthy participants. The increase in atogepant exposure during QG co-administration could be due to inhibition of CYP2D6 (a minor contributor to atogepant clearance) as well as inhibition of P-gp.
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Wang Y, Tu MJ, Yu AM. Efflux ABC transporters in drug disposition and their posttranscriptional gene regulation by microRNAs. Front Pharmacol 2024; 15:1423416. [PMID: 39114355 PMCID: PMC11303158 DOI: 10.3389/fphar.2024.1423416] [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: 04/25/2024] [Accepted: 07/11/2024] [Indexed: 08/10/2024] Open
Abstract
ATP-binding cassette (ABC) transporters are transmembrane proteins expressed commonly in metabolic and excretory organs to control xenobiotic or endobiotic disposition and maintain their homeostasis. Changes in ABC transporter expression may directly affect the pharmacokinetics of relevant drugs involving absorption, distribution, metabolism, and excretion (ADME) processes. Indeed, overexpression of efflux ABC transporters in cancer cells or bacteria limits drug exposure and causes therapeutic failure that is known as multidrug resistance (MDR). With the discovery of functional noncoding microRNAs (miRNAs) produced from the genome, many miRNAs have been revealed to govern posttranscriptional gene regulation of ABC transporters, which shall improve our understanding of complex mechanism behind the overexpression of ABC transporters linked to MDR. In this article, we first overview the expression and localization of important ABC transporters in human tissues and their clinical importance regarding ADME as well as MDR. Further, we summarize miRNA-controlled posttranscriptional gene regulation of ABC transporters and effects on ADME and MDR. Additionally, we discuss the development and utilization of novel bioengineered miRNA agents to modulate ABC transporter gene expression and subsequent influence on cellular drug accumulation and chemosensitivity. Findings on posttranscriptional gene regulation of ABC transporters shall not only improve our understanding of mechanisms behind variable ADME but also provide insight into developing new means towards rational and more effective pharmacotherapies.
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Affiliation(s)
| | | | - Ai-Ming Yu
- Department of Biochemistry and Molecular Medicine, School of Medicine, University of California at Davis, Sacramento, CA, United States
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3
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Murray M. Mechanisms and Clinical Significance of Pharmacokinetic Drug Interactions Mediated by FDA and EMA-approved Hepatitis C Direct-Acting Antiviral Agents. Clin Pharmacokinet 2023; 62:1365-1392. [PMID: 37731164 DOI: 10.1007/s40262-023-01302-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2023] [Indexed: 09/22/2023]
Abstract
The treatment of patients infected with the hepatitis C virus (HCV) has been revolutionised by the development of direct-acting antiviral agents (DAAs) that target specific HCV proteins involved in viral replication. The first DAAs were associated with clinical problems such as adverse drug reactions and pharmacokinetic drug-drug interactions (DDIs). Current FDA/EMA-approved treatments are combinations of DAAs that simultaneously target the HCV N5A-protein, the HCV N5B-polymerase and the HCV NS3/4A-protease. Adverse events and DDIs are less likely with these DAA combinations but several DDIs of potential clinical significance remain. Much of the available information on the interaction of DAAs with CYP drug-metabolising enzymes and influx and efflux transporters is contained in regulatory summaries and is focused on DDIs of likely clinical importance. Important DDIs perpetrated by current DAAs include increases in the pharmacokinetic exposure to statins and dabigatran. Some mechanistic information can be deduced. Although the free concentrations of DAAs in serum are very low, a number of these DDIs are likely mediated by the inhibition of systemic influx transporters, especially OATP1B1/1B3. Other DDIs may arise by DAA-mediated inhibition of intestinal efflux transporters, which increases the systemic concentrations of some coadministered drugs. Conversely, DAAs are victims of DDIs mediated by cyclosporin, ketoconazole, omeprazole and HIV antiretroviral drug combinations, especially when boosted by ritonavir and, to a lesser extent, cobicistat. In addition, concurrent administration of inducers, such as rifampicin, carbamazepine and efavirenz, decreases exposure to some DAAs. Drug-drug interactions that increase the accumulation of HCV N3/4A-protease inhibitors like grazoprevir may exacerbate hepatic injury in HCV patients.
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Affiliation(s)
- Michael Murray
- School of Pharmacy, Faculty of Medicine and Health, University of Sydney, New South Wales, 2006, Australia.
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4
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Gomez-Zepeda D, Perrière N, Glacial F, Taghi M, Chhuon C, Scherrmann JM, Sergent P, Moreau A, Denizot C, Parmentier Y, Cisternino S, Decleves X, Menet MC. Functional and targeted proteomics characterization of a human primary endothelial cell model of the blood-brain barrier (BBB) for drug permeability studies. Toxicol Appl Pharmacol 2023; 465:116456. [PMID: 36918128 DOI: 10.1016/j.taap.2023.116456] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 02/18/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023]
Abstract
The blood-brain barrier (BBB) protects the brain from toxins but hinders the penetration of neurotherapeutic drugs. Therefore, the blood-to-brain permeability of chemotherapeutics must be carefully evaluated. Here, we aimed to establish a workflow to generate primary cultures of human brain microvascular endothelial cells (BMVECs) to study drug brain permeability and bioavailability. Furthermore, we characterized and validated this BBB model in terms of quantitative expression of junction and drug-transport proteins, and drug permeability. We isolated brain microvessels (MVs) and cultured BMVECs from glioma patient biopsies. Then, we employed targeted LC-MS proteomics for absolute protein quantification and immunostaining to characterize protein localization and radiolabeled drugs to predict drug behavior at the Human BBB. The abundance levels of ABC transporters, junction proteins, and cell markers in the cultured BMVECs were similar to the MVs and correctly localized to the cell membrane. Permeability values (entrance and exit) and efflux ratios tested in vitro using the primary BMVECs were within the expected in vivo values. They correctly reflected the transport mechanism for 20 drugs (carbamazepine, diazepam, imipramine, ketoprofen, paracetamol, propranolol, sulfasalazine, terbutaline, warfarin, cimetidine, ciprofloxacin, digoxin, indinavir, methotrexate, ofloxacin, azidothymidine (AZT), indomethacin, verapamil, quinidine, and prazosin). We established a human primary in vitro model suitable for studying blood-to-brain drug permeability with a characterized quantitative abundance of transport and junction proteins, and drug permeability profiles, mimicking the human BBB. Our results indicate that this approach could be employed to generate patient-specific BMVEC cultures to evaluate BBB drug permeability and develop personalized therapeutic strategies.
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Affiliation(s)
- David Gomez-Zepeda
- Université Paris Cité, UMR-S 1144 Optimisation Thérapeutique en Neuropsychopharmacologie, Paris, France; German Cancer Research Center (DKFZ), Helmholtz Institute for Translational Oncology Mainz (HI-TRON Mainz), Immunoproteomics unit (D191), Mainz, Germany.
| | - Nicolas Perrière
- BrainPlotting SAS, Institut du Cerveau et de la Moelle épinière, Paris, France
| | - Fabienne Glacial
- BrainPlotting SAS, Institut du Cerveau et de la Moelle épinière, Paris, France
| | - Meryam Taghi
- Université Paris Cité, UMR-S 1144 Optimisation Thérapeutique en Neuropsychopharmacologie, Paris, France
| | - Cérina Chhuon
- Université de Paris, Structure Fédérative de Recherche Necker, Proteomics Platform Necker, INSERM US24/CNRS UMS3633, Paris, France
| | - Jean-Michel Scherrmann
- Université Paris Cité, UMR-S 1144 Optimisation Thérapeutique en Neuropsychopharmacologie, Paris, France
| | - Philippe Sergent
- Technologie Servier, Département de recherche biopharmaceutique, Orléans, France
| | - Amélie Moreau
- Technologie Servier, Département de recherche biopharmaceutique, Orléans, France
| | - Claire Denizot
- Technologie Servier, Département de recherche biopharmaceutique, Orléans, France
| | - Yannick Parmentier
- Technologie Servier, Département de recherche biopharmaceutique, Orléans, France
| | - Salvatore Cisternino
- Université Paris Cité, UMR-S 1144 Optimisation Thérapeutique en Neuropsychopharmacologie, Paris, France; Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Universitaire Necker-Enfants Malades, Service Pharmacie, Paris, France
| | - Xavier Decleves
- Université Paris Cité, UMR-S 1144 Optimisation Thérapeutique en Neuropsychopharmacologie, Paris, France; Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Cochin, UF Biologie du médicament et toxicologie, Paris, France
| | - Marie-Claude Menet
- Université Paris Cité, UMR-S 1144 Optimisation Thérapeutique en Neuropsychopharmacologie, Paris, France; Institut de Chimie Physique, CNRS 8000, Université Paris-Saclay, 91405 Orsay, France.
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Temesszentandrási-Ambrus C, Nagy G, Bui A, Gáborik Z. A Unique In Vitro Assay to Investigate ABCB4 Transport Function. Int J Mol Sci 2023; 24:ijms24054459. [PMID: 36901890 PMCID: PMC10003010 DOI: 10.3390/ijms24054459] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/20/2023] [Accepted: 02/22/2023] [Indexed: 03/12/2023] Open
Abstract
ABCB4 is almost exclusively expressed in the liver, where it plays an essential role in bile formation by transporting phospholipids into the bile. ABCB4 polymorphisms and deficiencies in humans are associated with a wide spectrum of hepatobiliary disorders, attesting to its crucial physiological function. Inhibition of ABCB4 by drugs may lead to cholestasis and drug-induced liver injury (DILI), although compared with other drug transporters, there are only a few identified substrates and inhibitors of ABCB4. Since ABCB4 shares up to 76% identity and 86% similarity in the amino acid sequence with ABCB1, also known to have common drug substrates and inhibitors, we aimed to develop an ABCB4 expressing Abcb1-knockout MDCKII cell line for transcellular transport assays. This in vitro system allows the screening of ABCB4-specific drug substrates and inhibitors independently of ABCB1 activity. Abcb1KO-MDCKII-ABCB4 cells constitute a reproducible, conclusive, and easy to use assay to study drug interactions with digoxin as a substrate. Screening a set of drugs with different DILI outcomes proved that this assay is applicable to test ABCB4 inhibitory potency. Our results are consistent with prior findings concerning hepatotoxicity causality and provide new insights for identifying drugs as potential ABCB4 inhibitors and substrates.
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Affiliation(s)
- Csilla Temesszentandrási-Ambrus
- SOLVO Biotechnology, Charles River Laboratories Hungary, H-1117 Budapest, Hungary
- Doctoral School of Molecular Medicine, Semmelweis University, Tűzoltó u. 37-47, H-1094 Budapest, Hungary
| | - Gábor Nagy
- SOLVO Biotechnology, Charles River Laboratories Hungary, H-1117 Budapest, Hungary
| | - Annamária Bui
- SOLVO Biotechnology, Charles River Laboratories Hungary, H-1117 Budapest, Hungary
| | - Zsuzsanna Gáborik
- SOLVO Biotechnology, Charles River Laboratories Hungary, H-1117 Budapest, Hungary
- Correspondence: ; Tel.: +36-303879216
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Transplacental Therapeutic Drug Monitoring in Pregnant Women with Fetal Tachyarrhythmia Using HPLC-MS/MS. Int J Mol Sci 2023; 24:ijms24031848. [PMID: 36768172 PMCID: PMC9916042 DOI: 10.3390/ijms24031848] [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: 12/06/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Fetal arrhythmia develops in 0.1-5% of pregnancies and may cause fetal heart failure and fetal hydrops, thus increasing fetal, neonatal, and infant mortality. The timely initiation of transplacental antiarrhythmic therapy (ART) promotes the conversion of fetal tachycardia to sinus rhythm and the regression of the concomitant non-immune fetal hydrops. The optimal treatment regimen search for the fetus with tachyarrhythmia is still of high value. Polymorphisms of these genes determines the individual features of the drug pharmacokinetics. The aim of this study was to study the pharmacokinetics of transplacental anti-arrhythmic drugs in the fetal therapy of arrhythmias using HPLC-MS/MS, as well as to assess the effect of the multidrug-resistance gene ABCB1 3435C > T polymorphism on the efficacy and maternal/fetal complications of digoxin treatment. The predisposition to a decrease in the bioavailability of the digoxin in patients with a homozygous variant of the CC polymorphism showed a probable association with the development of ART side effects. A pronounced decrease in heart rate in women with the 3435TT allele of the ABCB1 gene was found. The homozygous TT variant in the fetus showed a probable association with an earlier response to ART and rhythm disruptions on the digoxin dosage reduction. high-performance liquid chromatography with tandem mass spectrometry (HPLC-MS/MS) methods for digoxin and sotalol therapeutic drug monitoring in blood plasma, amniotic fluid, and urine were developed. The digoxin and sotalol concentrations were determined in the plasma blood, urine, and amniotic fluid of 30 pregnant women at four time points (from the beginning of the transplacental antiarrhythmic therapy to delivery) and the plasma cord blood of 30 newborns. A high degree of correlation between the level of digoxin and sotalol in maternal and cord blood was found. The ratio of digoxin and sotalol in cord blood to maternal blood was 0.35 (0.27 and 0.46) and 1.0 (0.97 and 1.07), accordingly. The digoxin concentration in the blood of the fetus at the moment of the first rhythm recovery episode, 0.58 (0.46, 0.8) ng/mL, was below the therapeutic interval. This confirms the almost complete transplacental transfer of sotalol and the significant limitation in the case of digoxin. Previously, ABCB1/P-glycoprotein had been shown to limit fetal exposure to drugs. Further studies (including multicenter ones) to clarify the genetic features of the transplacental pharmacokinetics of antiarrhythmic drugs are needed.
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Zuccato C, Cosenza LC, Zurlo M, Lampronti I, Borgatti M, Scapoli C, Gambari R, Finotti A. Treatment of Erythroid Precursor Cells from β-Thalassemia Patients with Cinchona Alkaloids: Induction of Fetal Hemoglobin Production. Int J Mol Sci 2021; 22:13433. [PMID: 34948226 PMCID: PMC8706579 DOI: 10.3390/ijms222413433] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/28/2021] [Accepted: 12/09/2021] [Indexed: 12/26/2022] Open
Abstract
β-thalassemias are among the most common inherited hemoglobinopathies worldwide and are the result of autosomal mutations in the gene encoding β-globin, causing an absence or low-level production of adult hemoglobin (HbA). Induction of fetal hemoglobin (HbF) is considered to be of key importance for the development of therapeutic protocols for β-thalassemia and novel HbF inducers need to be proposed for pre-clinical development. The main purpose on this study was to analyze Cinchona alkaloids (cinchonidine, quinidine and cinchonine) as natural HbF-inducing agents in human erythroid cells. The analytical methods employed were Reverse Transcription quantitative real-time PCR (RT-qPCR) (for quantification of γ-globin mRNA) and High Performance Liquid Chromatography (HPLC) (for analysis of the hemoglobin pattern). After an initial analysis using the K562 cell line as an experimental model system, showing induction of hemoglobin and γ-globin mRNA, we verified whether the two more active compounds, cinchonidine and quinidine, were able to induce HbF in erythroid progenitor cells isolated from β-thalassemia patients. The data obtained demonstrate that cinchonidine and quinidine are potent inducers of γ-globin mRNA and HbF in erythroid progenitor cells isolated from nine β-thalassemia patients. In addition, both compounds were found to synergize with the HbF inducer sirolimus for maximal production of HbF. The data obtained strongly indicate that these compounds deserve consideration in the development of pre-clinical approaches for therapeutic protocols of β-thalassemia.
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Affiliation(s)
- Cristina Zuccato
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (C.Z.); (L.C.C.); (M.Z.); (I.L.); (M.B.)
| | - Lucia Carmela Cosenza
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (C.Z.); (L.C.C.); (M.Z.); (I.L.); (M.B.)
| | - Matteo Zurlo
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (C.Z.); (L.C.C.); (M.Z.); (I.L.); (M.B.)
| | - Ilaria Lampronti
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (C.Z.); (L.C.C.); (M.Z.); (I.L.); (M.B.)
- Research Laboratory “Elio Zago” on the Pharmacologic and Pharmacogenomic Therapy of Thalassemia (Thal-LAB), University of Ferrara, 44121 Ferrara, Italy
| | - Monica Borgatti
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (C.Z.); (L.C.C.); (M.Z.); (I.L.); (M.B.)
- Research Laboratory “Elio Zago” on the Pharmacologic and Pharmacogenomic Therapy of Thalassemia (Thal-LAB), University of Ferrara, 44121 Ferrara, Italy
| | - Chiara Scapoli
- Section of Biology and Evolution, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy;
| | - Roberto Gambari
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (C.Z.); (L.C.C.); (M.Z.); (I.L.); (M.B.)
- Research Laboratory “Elio Zago” on the Pharmacologic and Pharmacogenomic Therapy of Thalassemia (Thal-LAB), University of Ferrara, 44121 Ferrara, Italy
- Interuniversity Consortium for Biotechnology (C.I.B.), 34148 Trieste, Italy
| | - Alessia Finotti
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (C.Z.); (L.C.C.); (M.Z.); (I.L.); (M.B.)
- Research Laboratory “Elio Zago” on the Pharmacologic and Pharmacogenomic Therapy of Thalassemia (Thal-LAB), University of Ferrara, 44121 Ferrara, Italy
- Interuniversity Consortium for Biotechnology (C.I.B.), 34148 Trieste, Italy
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8
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ATP-binding cassette transporters and neurodegenerative diseases. Essays Biochem 2021; 65:1013-1024. [PMID: 34415015 DOI: 10.1042/ebc20210012] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 12/12/2022]
Abstract
ATP-binding cassette (ABC) transporters are one of the largest groups of transporter families in humans. ABC transporters mediate the translocation of a diverse range of substrates across cellular membranes, including amino acids, nucleosides, lipids, sugars and xenobiotics. Neurodegenerative diseases are a group of brain diseases that detrimentally affect neurons and other brain cells and are usually associated with deposits of pathogenic proteins in the brain. Major neurodegenerative diseases include Alzheimer's disease, Parkinson's disease and amyotrophic lateral sclerosis. ABC transporters are highly expressed in the brain and have been implicated in a number of pathological processes underlying neurodegenerative diseases. This review outlines the current understanding of the role of ABC transporters in neurodegenerative diseases, focusing on some of the most important pathways, and also suggests future directions for research in this field.
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Anderson LL, Etchart MG, Bahceci D, Golembiewski TA, Arnold JC. Cannabis constituents interact at the drug efflux pump BCRP to markedly increase plasma cannabidiolic acid concentrations. Sci Rep 2021; 11:14948. [PMID: 34294753 PMCID: PMC8298633 DOI: 10.1038/s41598-021-94212-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 06/25/2021] [Indexed: 12/19/2022] Open
Abstract
Cannabis is a complex mixture of hundreds of bioactive molecules. This provides the potential for pharmacological interactions between cannabis constituents, a phenomenon referred to as “the entourage effect” by the medicinal cannabis community. We hypothesize that pharmacokinetic interactions between cannabis constituents could substantially alter systemic cannabinoid concentrations. To address this hypothesis we compared pharmacokinetic parameters of cannabinoids administered orally in a cannabis extract to those administered as individual cannabinoids at equivalent doses in mice. Astonishingly, plasma cannabidiolic acid (CBDA) concentrations were 14-times higher following administration in the cannabis extract than when administered as a single molecule. In vitro transwell assays identified CBDA as a substrate of the drug efflux transporter breast cancer resistance protein (BCRP), and that cannabigerol and Δ9-tetrahydrocannabinol inhibited the BCRP-mediated transport of CBDA. Such a cannabinoid-cannabinoid interaction at BCRP transporters located in the intestine would inhibit efflux of CBDA, thus resulting in increased plasma concentrations. Our results suggest that cannabis extracts provide a natural vehicle to substantially enhance plasma CBDA concentrations. Moreover, CBDA might have a more significant contribution to the pharmacological effects of orally administered cannabis extracts than previously thought.
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Affiliation(s)
- Lyndsey L Anderson
- Brain and Mind Centre, Discipline of Pharmacology, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia.,Lambert Initiative for Cannabinoid Therapeutics, Brain and Mind Centre, The University of Sydney, 94 Mallett St, Camperdown, NSW, 2050, Australia
| | - Maia G Etchart
- Lambert Initiative for Cannabinoid Therapeutics, Brain and Mind Centre, The University of Sydney, 94 Mallett St, Camperdown, NSW, 2050, Australia
| | - Dilara Bahceci
- Brain and Mind Centre, Discipline of Pharmacology, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Taliesin A Golembiewski
- Brain and Mind Centre, Discipline of Pharmacology, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Jonathon C Arnold
- Brain and Mind Centre, Discipline of Pharmacology, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia. .,Lambert Initiative for Cannabinoid Therapeutics, Brain and Mind Centre, The University of Sydney, 94 Mallett St, Camperdown, NSW, 2050, Australia.
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Abstract
Genetic testing has yielded major advances in our understanding of the causes of epilepsy. Seizures remain resistant to treatment in a significant proportion of cases, particularly in severe, childhood-onset epilepsy, the patient population in which an underlying causative genetic variant is most likely to be identified. A genetic diagnosis can be explanatory as to etiology, and, in some cases, might suggest a therapeutic approach; yet, a clear path from genetic diagnosis to treatment remains unclear in most cases. Here, we discuss theoretical considerations behind the attempted use of small molecules for the treatment of genetic epilepsies, which is but one among various approaches currently under development. We explore a few salient examples and consider the future of the small molecule approach for genetic epilepsies. We conclude that significant additional work is required to understand how genetic variation leads to dysfunction of epilepsy-associated protein targets, and how this impacts the function of diverse subtypes of neurons embedded within distributed brain circuits to yield epilepsy and epilepsy-associated comorbidities. A syndrome- or even variant-specific approach may be required to achieve progress. Advances in the field will require improved methods for large-scale target validation, compound identification and optimization, and the development of accurate model systems that reflect the core features of human epilepsy syndromes, as well as novel approaches towards clinical trials of such compounds in small rare disease cohorts.
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Affiliation(s)
- Ethan M Goldberg
- Department of Pediatrics, Division of Neurology, Abramson Research Center, The Epilepsy Neurogenetics Initiative, The Children's Hospital of Philadelphia, Abramson Research Center Room 502A, 19104, Philadelphia, PA, USA.
- Departments of Neurology and Neuroscience, The University of Pennsylvania Perelman School of Medicine, 19104, Philadelphia, PA, USA.
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11
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Detoxification of toxic herbs in TCM prescription based on modulation of efflux transporters. DIGITAL CHINESE MEDICINE 2021. [DOI: 10.1016/j.dcmed.2021.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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12
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Li C, Chen Z, Zheng D, Zhao J, Lei J. Targeted Delivery of Dual Anticancer Drugs Based on Self-Assembled iRGD-Modified Soluble Drug-Polymer Pattern Conjugate Nanoparticles. ACS APPLIED BIO MATERIALS 2021; 4:1499-1507. [PMID: 35014499 DOI: 10.1021/acsabm.0c01388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A tumor-penetrating peptide, iRGD (a tumor-homing peptide, CRGDKGPDC), could enhance the penetration of drugs via the specific receptor-binding affinity to αvβ3 and NRP-1 that overexpressed on tumor vasculature and tumor cells. Considering the side effects of traditional chemotherapy, here, poly(ethylene glycol) (PEG, Mw = 7500)-based and iRGD-modified poly(ethylene glycol)-based nanoparticles were successfully prepared. iRGD, as a tumor-targeting and tumor-penetrating agent, was combined with PEG after the esterification reaction between PEG and diosgenin (DGN). After the efficient loading of 10-hydroxycamptothecin (HCPT), the iRGD-PEG-DGN/HCPT NPs of chemotherapy were established. The characteristics of iRGD-PEG-DGN/HCPT NPs were evaluated. This nano-delivery system possessed high drug loading efficiency (∼17.34 wt % HCPT), controlled release rate, good pH response, and iRGD active targeting and passive targeting with an appropriate size (∼140 nm). All these features forcefully indicated that the iRGD-modified drug delivery system could markedly ameliorate the tumor therapy efficacy compared to the nontargeted nanoparticles through enhancing the tumor accumulation and penetration.
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Affiliation(s)
- Chunxiao Li
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang 443002, P. R. China
| | - Zhenyu Chen
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang 443002, P. R. China
| | - Dan Zheng
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Jingyang Zhao
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Jiandu Lei
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
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13
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Han Jie L, Jantan I, Yusoff SD, Jalil J, Husain K. Sinensetin: An Insight on Its Pharmacological Activities, Mechanisms of Action and Toxicity. Front Pharmacol 2021; 11:553404. [PMID: 33628166 PMCID: PMC7898666 DOI: 10.3389/fphar.2020.553404] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 12/11/2020] [Indexed: 12/11/2022] Open
Abstract
Sinensetin, a plant-derived polymethoxylated flavonoid found in Orthosiphon aristatus var. aristatus and several citrus fruits, has been found to possess strong anticancer activities and a variety of other pharmacological benefits and promising potency in intended activities with minimal toxicity. This review aims to compile an up-to-date reports of published scientific information on sinensetin pharmacological activities, mechanisms of action and toxicity. The present findings about the compound are critically analyzed and its prospect as a lead molecule for drug discovery is highlighted. The databases employed for data collection are mainly through Google Scholar, PubMed, Scopus and Science Direct. In-vitro and in-vivo studies showed that sinensetin possessed strong anticancer activities and a wide range of pharmacological activities such as anti-inflammatory, antioxidant, antimicrobial, anti-obesity, anti-dementia and vasorelaxant activities. The studies provided some insights on its several mechanisms of action in cancer and other disease states. However, more detail mechanistic studies are needed to understand its pharmacological effects. More in vivo studies in various animal models including toxicity, pharmacokinetic, pharmacodynamic and bioavailability studies are required to assess its efficacy and safety before submission to clinical studies. In this review, an insight on sinensetin pharmacological activities and mechanisms of action serves as a useful resource for a more thorough and comprehensive understanding of sinensetin as a potential lead candidate for drug discovery.
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Affiliation(s)
- Lee Han Jie
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Ibrahim Jantan
- Institute of Systems Biology, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Syaratul Dalina Yusoff
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Juriyati Jalil
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Khairana Husain
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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Yulin Z, Lingti K, Shan G, Yong Z. A possible interaction between linezolid and digoxin: A case report of therapeutic drug monitoring. Saudi Pharm J 2020; 28:1408-1410. [PMID: 33250647 PMCID: PMC7679430 DOI: 10.1016/j.jsps.2020.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 09/08/2020] [Indexed: 11/06/2022] Open
Abstract
Drug-drug interactions lead to altered clinical effects, including adverse reactions. Therapeutic drug monitoring of digoxin is necessary due to its narrow therapeutic range. Linezolid can cause variable exposures in patients hospitalized in the intensive care unit owing to its possibility of drug-drug interactions. We present a patient with pneumonia and heart failure who experienced a possible drug interaction between linezolid and digoxin, resulting in high serum concentrations of both drugs. Also, the patient developed thrombocytopenia likely related to linezolid. The linezolid dose required to maintain sufficient levels had to reduce to 50% of the usual linezolid dose. A quarter dose of the standard digoxin dose was needed. Although the underlying mechanism of the drug interaction is unclear, we recommend conducting therapeutic drug monitoring when linezolid and digoxin are administered concurrently.
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Affiliation(s)
- Zhu Yulin
- Department of Pharmacy, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China.,Pulmonary and Critical Care Medicine, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Kong Lingti
- Department of Pharmacy, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Gao Shan
- Pulmonary and Critical Care Medicine, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Zhang Yong
- Pulmonary and Critical Care Medicine, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
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15
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Keiser J, Koch V, Deckers A, Cheung HTA, Jung N, Bräse S. Naturally Occurring Cardenolides Affecting Schistosoma mansoni. ACS Infect Dis 2020; 6:1922-1927. [PMID: 32364372 PMCID: PMC7359852 DOI: 10.1021/acsinfecdis.0c00175] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Schistosomiasis is a neglected tropical disease of considerable public health burden. We recently discovered a micromolar activity of several cardenolides against newly transformed schistosomula (NTS) of the parasitic flatworm Schistosoma mansoni in a small compound screen including different substance classes of both natural products as well as synthetic molecules. In further experiments, a focused library of naturally occurring and synthetic steroids was explored against NTS and adult S. mansoni, revealing seven cardenolides with comparable activities as known anthelminthics such as praziquantel. Of these, gomphoside monoacetate and uscharin showed suitable therapeutic indices. In a first in vivo study, at a dose of 10 mg/kg, only minor activity in mice harboring a chronic S. mansoni infection could be shown, which will be further investigated by structure-activity relationship studies as well as pharmacodynamic and pharmacokinetic approaches.
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Affiliation(s)
- Jennifer Keiser
- Swiss Tropical and Public Health Institute, Socinstrasse 57, CH-4051 Basel, Switzerland
- University of Basel, CH-4003 Basel, Switzerland
| | - Vanessa Koch
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Anke Deckers
- Institute of Biological and Chemical Systems, Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - H. T. Andrew Cheung
- Faculty of Pharmacy, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Nicole Jung
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems, Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems, Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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16
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Taghikhani E, Maas R, Taudte RV, Gessner A, Fromm MF, König J. Vectorial transport of the arginine derivatives asymmetric dimethylarginine (ADMA) and L-homoarginine by OATP4C1 and P-glycoprotein studied in double-transfected MDCK cells. Amino Acids 2020; 52:975-985. [PMID: 32642843 PMCID: PMC7406541 DOI: 10.1007/s00726-020-02867-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 06/25/2020] [Indexed: 12/18/2022]
Abstract
Elevated plasma concentrations of the uremic toxin asymmetric dimethylarginine (ADMA) and low plasma concentrations of l-homoarginine are independently associated with cardiovascular events and mortality. Key enzymes involved in the homeostasis of both arginine derivatives are expressed in proximal tubule cells of the kidney. To get access to these enzymes, transport proteins are important. One of the transporters mediating the transport of ADMA and l-homoarginine is the solute carrier superfamily (SLC) member OATP4C1, located in the basolateral membrane of proximal tubule cells. To gain insights into the role of export pumps in the transport of both substances, we established a double-transfected MDCK cell line expressing OATP4C1 and the export pump P-glycoprotein (P-gp). Using MDCK cell monolayers, we demonstrated in time-dependent and concentration-dependent vectorial transport experiments that ADMA and l-homoarginine are transported from the basolateral to the apical compartment of MDCK-OATP4C1-P-gp cells with significantly higher transport rates compared to single-transfected MDCK-OATP4C1, MDCK-P-gp and MDCK-VC (control) cells (e.g. transport ratio MDCK-OATP4C1-P-gp/MDCK-VC: for 50 µM ADMA = 2.0-fold, for 50 µM l-homoarginine = 3.4-fold). These results indicate that both OATP4C1 and P-gp transport the arginine derivatives ADMA and l-homoarginine and are, therefore, important for the homoeostasis of both substances.
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Affiliation(s)
- Emir Taghikhani
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, 91054, Erlangen, Germany
| | - Renke Maas
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, 91054, Erlangen, Germany
| | - R Verena Taudte
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, 91054, Erlangen, Germany
| | - Arne Gessner
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, 91054, Erlangen, Germany
| | - Martin F Fromm
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, 91054, Erlangen, Germany
| | - Jörg König
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Fahrstrasse 17, 91054, Erlangen, Germany.
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17
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Singh R, Naik T, Nigam A, Chatterjee S, Rajanna P, Shen H, Iyer R. Is aspirin a substrate of MDR1/P-glycoprotein? Xenobiotica 2020; 50:1258-1264. [PMID: 32302241 DOI: 10.1080/00498254.2020.1757785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Aspirin (acetyl salicylic acid) is widely used co-medication in patients with cardiovascular and cerebrovascular diseases. Given the prevalence of acetyl salicylic acid's use as a co-medication and conflicting reports in the literature on it being a substrate of P-glycoprotein (P-gp). There is a potential risk for its interaction with compounds with P-gp liability, therefore, we have conducted a detailed investigation to determine substrate potential of acetyl salicylic acid towards P-gp. We observed significantly lower cellular uptake of acetyl salicylic acid in MDR1 transfected LLC-PK1 cells compared to LLC-PK1 wild-type (WT) cells, however, the in vitro efflux of acetyl salicylic acid in MDR1 transfected LLC-PK1 cells was not inhibited by known inhibitors under various conditions. Acetyl salicylic acid did not show active asymmetrical transport across MDR1 transfected LLC-PK1 cells compared to LLC-PK1-WT cells in transwell assay. Moreover, no difference in plasma and brain exposure of acetyl salicylic acid and its metabolite salicylic acid was observed between FVB-WT and Mdr1a/b knockout (KO) mice. Taken together, our findings indicate that acetyl salicylic acid is not a substrate of P-gp.
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Affiliation(s)
- Renu Singh
- Department of Metabolism and Pharmacokinetics, Bristol-Myers Squibb, Lawrenceville, NJ, USA
| | - Tanvi Naik
- Pharmaceutical Candidate Optimization, Syngene International Ltd, Bangalore, India
| | - Anuja Nigam
- Pharmaceutical Candidate Optimization, Syngene International Ltd, Bangalore, India
| | - Sagnik Chatterjee
- Pharmaceutical Candidate Optimization, Syngene International Ltd, Bangalore, India
| | - Prabhakar Rajanna
- Pharmaceutical Candidate Optimization, Syngene International Ltd, Bangalore, India
| | - Hong Shen
- Department of Metabolism and Pharmacokinetics, Bristol-Myers Squibb, Lawrenceville, NJ, USA
| | - Ramaswamy Iyer
- Department of Metabolism and Pharmacokinetics, Bristol-Myers Squibb, Lawrenceville, NJ, USA
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Chen C, Zhou H, Guan C, Zhang H, Li Y, Jiang X, Dong Z, Tao Y, Du J, Wang S, Zhang T, Du N, Guo J, Wu Y, Song Z, Luan H, Wang Y, Du H, Zhang S, Li C, Chang H, Wang T. Applicability of free drug hypothesis to drugs with good membrane permeability that are not efflux transporter substrates: A microdialysis study in rats. Pharmacol Res Perspect 2020; 8:e00575. [PMID: 32266794 PMCID: PMC7138916 DOI: 10.1002/prp2.575] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 02/10/2020] [Accepted: 02/10/2020] [Indexed: 12/16/2022] Open
Abstract
In clinical pharmacology, the free drug hypothesis has been widely applied in the interpretation of the relationship between pharmacokinetics and pharmacodynamics (PK/PD). The free drug hypothesis assumes that the unbound drug concentration in blood is the same as that in the site of action at steady state. The objective of this study is to demonstrate whether the free drug hypothesis is universally applicable for all drugs. The unbound concentrations of the 18 compounds in blood and in brain interstitial fluids (ISF) at steady state following constant intravenous infusion were simultaneously monitored up to 6 hours via in vivo microdialysis technique. Based on the permeability and efflux ratio (ER), the test compounds can be divided into two classes. Class I includes the compounds with good membrane permeability that are not substrates of efflux transporters (eg, P-gp, BCRP, and MRPs), whereas Class II includes the compounds that are substrates of efflux transporters. The steady-state unbound drug concentrations in blood, brain, and CSF are quantitatively very similar for Class I compounds, whereas the steady-state unbound concentrations in the brain and CSF are significantly lower than those in blood for Class II compounds. These results strongly suggest that the free drug hypothesis is not universal for all drugs but is only applicable for drugs with good permeability that are not substrates of efflux transporters.
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Affiliation(s)
- Chun Chen
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Hongyu Zhou
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Chi Guan
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Huanhuan Zhang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Yingying Li
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Xue Jiang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Zheng Dong
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Yuanyuan Tao
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Juan Du
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Shuyao Wang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Teng Zhang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Na Du
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Junyang Guo
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Yaqiong Wu
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Zehai Song
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Haofei Luan
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Yu Wang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Hongwen Du
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Shaofeng Zhang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Chen Li
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Hang Chang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
| | - Tao Wang
- Drug Metabolism and Pharmacokinetics (DMPK) DepartmentPharmaronBeijingChina
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The Segregated Intestinal Flow Model (SFM) for Drug Absorption and Drug Metabolism: Implications on Intestinal and Liver Metabolism and Drug-Drug Interactions. Pharmaceutics 2020; 12:pharmaceutics12040312. [PMID: 32244748 PMCID: PMC7238003 DOI: 10.3390/pharmaceutics12040312] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/26/2020] [Accepted: 03/27/2020] [Indexed: 12/13/2022] Open
Abstract
The properties of the segregated flow model (SFM), which considers split intestinal flow patterns perfusing an active enterocyte region that houses enzymes and transporters (<20% of the total intestinal blood flow) and an inactive serosal region (>80%), were compared to those of the traditional model (TM), wherein 100% of the flow perfuses the non-segregated intestine tissue. The appropriateness of the SFM model is important in terms of drug absorption and intestinal and liver drug metabolism. Model behaviors were examined with respect to intestinally (M1) versus hepatically (M2) formed metabolites and the availabilities in the intestine (FI) and liver (FH) and the route of drug administration. The %contribution of the intestine to total first-pass metabolism bears a reciprocal relation to that for the liver, since the intestine, a gateway tissue, regulates the flow of substrate to the liver. The SFM predicts the highest and lowest M1 formed with oral (po) and intravenous (iv) dosing, respectively, whereas the extent of M1 formation is similar for the drug administered po or iv according to the TM, and these values sit intermediate those of the SFM. The SFM is significant, as this drug metabolism model explains route-dependent intestinal metabolism, describing a higher extent of intestinal metabolism with po versus the much reduced or absence of intestinal metabolism with iv dosing. A similar pattern exists for drug–drug interactions (DDIs). The inhibitor or inducer exerts its greatest effect on victim drugs when both inhibitor/inducer and drug are given po. With po dosing, more drug or inhibitor/inducer is brought into the intestine for DDIs. The bypass of flow and drug to the enterocyte region of the intestine after intravenous administration adds complications to in vitro–in vivo extrapolations (IVIVE).
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Digoxin-amiodarone Combination is Associated With Excess All-cause Mortality in Patients With Atrial Fibrillation. Sci Rep 2020; 10:4101. [PMID: 32139765 PMCID: PMC7058044 DOI: 10.1038/s41598-020-61065-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 02/05/2020] [Indexed: 11/12/2022] Open
Abstract
Combination use of digoxin and other medications might lead to worse outcomes in patients with atrial fibrillation (AF). We sought to investigate whether digoxin-amiodarone combination would lead to worse outcome than digoxin alone in patients with AF. Adult patients with AF and received digoxin treatment from random samples of 1,000,000 individuals covered by the National Health Insurance in Taiwan were included. Baseline characteristics including risk factors and medications were matched by propensity score (PS) in those with and without addition of amiodarone treatment. A total of 5,040 AF patients taking digoxin therapy was included. PS matching identified 1,473 patients receiving digoxin-amiodarone combination and 2,660 patients receiving digoxin with a median follow-up of 1,331 days. Digoxin-amiodarone combination was associated with increased all-cause mortality (adjusted hazard ratio (HR): 1.640, 95% confidence interval (CI): 1.470–1.829, P < 0.001). The risk of mortality increased regardless of duration of combination. Risk of sudden cardiac death was not increased in the combination group (HR: 1.304, 95% CI: 1.049–1.622, P = 0.017). Death due to non-arrhythmic cardiac disease, cerebrovascular disease, and other vascular disease were higher in the combination group than the digoxin group. In conclusion, in patients with AF, digoxin-amiodarone combination therapy is associated with excess mortality than digoxin alone.
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Shubbar MH, Penny JI. Therapeutic drugs modulate ATP-Binding cassette transporter-mediated transport of amyloid beta (1-42) in brain microvascular endothelial cells. Eur J Pharmacol 2020; 874:173009. [PMID: 32061744 DOI: 10.1016/j.ejphar.2020.173009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/28/2020] [Accepted: 02/10/2020] [Indexed: 01/07/2023]
Abstract
Deposition of amyloid-β peptide (Aβ(1-42)) is a hallmark of Alzheimer's disease. Clearance of Aβ(1-42), across the blood-brain barrier (BBB), is mediated by ATP-binding Cassette (ABC) efflux transporters. Many therapeutic drugs inhibit ABC transporters, but little is known of the effect of therapeutic drugs on Aβ(1-42) transport across BBB endothelial cells. The effects of selected, widely prescribed, therapeutic drugs on ABCB1, ABCC5 and ABCG2 activities were determined by measuring intracellular levels of calcein, GS-MF, and Hoechst 33342 respectively in primary porcine brain endothelial cells (PBECs). The ability of ABCB1, ABCC5 and ABCG2 to transport Aβ(1-42) was determined using fluorescent Aβ(1-42). The ability of the ABCB1, ABCC5 and ABCG2 inhibitor telmisartan to modify transcellular Aβ(1-42) transport was investigated using PBEC monolayers housed in Transwell® inserts. Treatment of PBECs with ABC transporter inhibitory drugs (indomethacin, olanzapine, chlorpromazine, telmisartan, pantoprazole, quinidine, sulfasalazine and nefazodone) increased Aβ(1-42) intracellular accumulation. Inhibition of ABCB1, ABCC5 and ABCG2 by telmisartan increased Aβ(1-42) transport in the apical to basal direction and reduced its transport in basal to apical direction in PBEC monolayers. ABCB1, ABCC5 and ABCG2 mediate the efflux transport of Aβ(1-42) in BBB endothelial cells. Inhibition of ABC transporters by therapeutic drugs, at plasma concentrations, could decrease Aβ(1-42) clearance from brain, across BBB endothelial cells into blood, and potentially influence levels of the Aβ(1-42) peptide within the brain.
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Affiliation(s)
- Maryam H Shubbar
- Division of Pharmacy & Optometry, University of Manchester, Manchester, M13 9PT, UK.
| | - Jeffrey I Penny
- Division of Pharmacy & Optometry, University of Manchester, Manchester, M13 9PT, UK
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Rocha-Pereira C, Ghanem CI, Silva R, Casanova AG, Duarte-Araújo M, Gonçalves-Monteiro S, Sousa E, Bastos MDL, Remião F. P-glycoprotein activation by 1-(propan-2-ylamino)-4-propoxy-9H-thioxanthen-9-one (TX5) in rat distal ileum: ex vivo and in vivo studies. Toxicol Appl Pharmacol 2020; 386:114832. [PMID: 31756430 DOI: 10.1016/j.taap.2019.114832] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 11/14/2019] [Accepted: 11/16/2019] [Indexed: 12/30/2022]
Abstract
In vitro studies showed that 1-(propan-2-ylamino)-4-propoxy-9H-thioxanthen-9-one (TX5) increases P-glycoprotein (P-gp) expression and activity in Caco-2 cells, preventing xenobiotic toxicity. The present study aimed at investigating TX5 effects on P-gp expression/activity using Wistar Han rats: a) in vivo, evaluating intestinal P-gp activity; b) ex vivo, evaluating P-gp expression in ileum brush border membranes (BBM) and P-gp activity in everted intestinal sacs; c) ex vivo, evaluating P-gp activity in everted intestinal sacs of the distal and proximal ileum. TX5 (30 mg/kg, b.w.), gavage, activated P-gp in vivo, given the significant decrease in the AUC of digoxin (0.25 mg/kg, b.w.). The efflux of rhodamine 123 (300 μM), a P-gp fluorescent substrate, significantly increased in TX5-treated everted sacs from the distal portion of the rat ileum, when P-gp activity was evaluated in the presence of TX5 (20 μM), an effect abolished by the P-gp inhibitor verapamil (100 μM). No increases on P-gp expression or activity were found in TX5-treated BBM of the distal ileum and everted distal sacs, respectively, 24 h after TX5 (10 mg/kg, b.w.) administration. In vivo, no differences were found on digoxin portal concentration between control (digoxin 0.025 mg/kg, b.w., intraduodenal) and TX5-treated (digoxin+TX5 20 μM, intraduodenal) rats. The observed discrepancies in digoxin results can be related to differences in TX5 dose administered and used methodologies. Thus, the results show that TX5 activates P-gp at the distal portion of the rat ileum, and, at the higher dose tested (30 mg/kg, b.w.), seems to modulate in vivo the AUC of P-gp substrates.
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Affiliation(s)
- Carolina Rocha-Pereira
- UCIBIO/REQUIMTE, Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Carolina I Ghanem
- Instituto de Investigaciones Farmacológicas (ININFA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, CONICET, Buenos Aires, Argentina.
| | - Renata Silva
- UCIBIO/REQUIMTE, Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Alfredo G Casanova
- Unidad de Toxicología, Departamento de Fisiología y Farmacología, Universidad de Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain.
| | - Margarida Duarte-Araújo
- LAQV/REQUIMTE, Departamento de Imuno-Fisiologia e Farmacologia, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Salomé Gonçalves-Monteiro
- LAQV/REQUIMTE, Laboratório de Farmacologia, Departamento de Ciências do Medicamento, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Emília Sousa
- CIIMAR, Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Maria de Lourdes Bastos
- UCIBIO/REQUIMTE, Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
| | - Fernando Remião
- UCIBIO/REQUIMTE, Laboratório de Toxicologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
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Snyder S, Murundi S, Crawford L, Putnam D. Enabling P-glycoprotein inhibition in multidrug resistant cancer through the reverse targeting of a quinidine-PEG conjugate. J Control Release 2020; 317:291-299. [DOI: 10.1016/j.jconrel.2019.11.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/15/2019] [Accepted: 11/22/2019] [Indexed: 11/15/2022]
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Djohan AH, Sia CH, Singh D, Lin W, Kong WKF, Poh KK. A myriad of electrocardiographic findings associated with digoxin use. Singapore Med J 2020; 61:9-14. [PMID: 32043160 PMCID: PMC7900815 DOI: 10.11622/smedj.2020005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Digoxin is a commonly prescribed drug in the management of heart failure and atrial fibrillation. Despite its widespread use, most clinicians have little experience with recognising clinical signs and symptoms that might suggest a potentially lethal drug toxicity. We herein describe two cases with specific reference to the electrocardiographic changes induced by digoxin and discuss the predisposing factors for toxicity, recognition of possible toxicity and treatment approaches.
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Affiliation(s)
| | - Ching-Hui Sia
- Department of Cardiology, National University Heart Centre Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Devinder Singh
- Department of Cardiology, National University Heart Centre Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Weiqin Lin
- Department of Cardiology, National University Heart Centre Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - William Kok-Fai Kong
- Department of Cardiology, National University Heart Centre Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Kian-Keong Poh
- Department of Cardiology, National University Heart Centre Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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Successful Prediction of Human Pharmacokinetics by Improving Calculation Processes of Physiologically Based Pharmacokinetic Approach. J Pharm Sci 2019; 108:2718-2727. [DOI: 10.1016/j.xphs.2019.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 02/27/2019] [Accepted: 03/05/2019] [Indexed: 11/22/2022]
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Kibathi LW, Bae S, Penzak SR, Kumar P. Potential Influence of Centrally Acting Herbal Drugs on Transporters at the Blood-Cerebrospinal Fluid Barrier and Blood-Brain Barrier. Eur J Drug Metab Pharmacokinet 2019; 43:619-635. [PMID: 29858835 DOI: 10.1007/s13318-018-0486-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Complementary and alternative medications (CAM) with known or suspected pharmacologic activity in the central nervous system (CNS) are common. These herbal preparations may cause clinically significant drug-drug interactions (DDIs) when coadministered with medications that act in the CNS. This can result in negative outcomes such as toxicity or loss of efficacy. Most drug interaction reports with CAM focus on cytochrome P450 (CYP) modulation. However, drug interactions between CAM and conventional medications may occur via mechanisms other than CYP inhibition or induction; in particular, modulation of drug transport proteins represents an important mechanism by which such interactions may occur. This article provides an updated review of transporter-mediated mechanisms by which herbal products may theoretically interact with centrally acting medications at the blood-brain barrier and blood-cerebrospinal fluid (CSF) barrier. Further research is required before the true clinical impact of interactions involving modulation of centrally located membrane transporters can be fully understood.
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Affiliation(s)
- Lilian W Kibathi
- Clinical Pharmacokinetics Research Unit, Clinical Center Pharmacy Department, National Institutes of Health (NIH), Bethesda, MD, USA
| | - SoHyun Bae
- University of Iowa College of Pharmacy, Iowa City, IA, USA
| | - Scott R Penzak
- Department of Pharmacotherapy, University of North Texas System, College of Pharmacy, 3500 Camp Bowie Blvd-RES 302B, Fort Worth, TX, 76107, USA.
| | - Parag Kumar
- Clinical Pharmacokinetics Research Unit, Clinical Center Pharmacy Department, National Institutes of Health (NIH), Bethesda, MD, USA
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Rusli N, Amanah A, Kaur G, Adenan MI, Sulaiman SF, Wahab HA, Tan ML. The inhibitory effects of mitragynine on P-glycoprotein in vitro. Naunyn Schmiedebergs Arch Pharmacol 2019; 392:481-496. [DOI: 10.1007/s00210-018-01605-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 12/14/2018] [Indexed: 12/13/2022]
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Müller F, Sharma A, König J, Fromm MF. Biomarkers for In Vivo Assessment of Transporter Function. Pharmacol Rev 2018; 70:246-277. [PMID: 29487084 DOI: 10.1124/pr.116.013326] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Drug-drug interactions are a major concern not only during clinical practice, but also in drug development. Due to limitations of in vitro-in vivo predictions of transporter-mediated drug-drug interactions, multiple clinical Phase I drug-drug interaction studies may become necessary for a new molecular entity to assess potential drug interaction liabilities. This is a resource-intensive process and exposes study participants, who frequently are healthy volunteers without benefit from study treatment, to the potential risks of a new drug in development. Therefore, there is currently a major interest in new approaches for better prediction of transporter-mediated drug-drug interactions. In particular, researchers in the field attempt to identify endogenous compounds as biomarkers for transporter function, such as hexadecanedioate, tetradecanedioate, coproporphyrins I and III, or glycochenodeoxycholate sulfate for hepatic uptake via organic anion transporting polypeptide 1B or N1-methylnicotinamide for multidrug and toxin extrusion protein-mediated renal secretion. We summarize in this review the currently proposed biomarkers and potential limitations of the substances identified to date. Moreover, we suggest criteria based on current experiences, which may be used to assess the suitability of a biomarker for transporter function. Finally, further alternatives and supplemental approaches to classic drug-drug interaction studies are discussed.
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Affiliation(s)
- Fabian Müller
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany (F.M., J.K., M.F.F.); and Department of Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach a.d. Riß, Germany (F.M., A.S.)
| | - Ashish Sharma
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany (F.M., J.K., M.F.F.); and Department of Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach a.d. Riß, Germany (F.M., A.S.)
| | - Jörg König
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany (F.M., J.K., M.F.F.); and Department of Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach a.d. Riß, Germany (F.M., A.S.)
| | - Martin F Fromm
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany (F.M., J.K., M.F.F.); and Department of Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach a.d. Riß, Germany (F.M., A.S.)
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Eyal S. The Fever Tree: from Malaria to Neurological Diseases. Toxins (Basel) 2018; 10:E491. [PMID: 30477182 PMCID: PMC6316520 DOI: 10.3390/toxins10120491] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/14/2018] [Accepted: 11/15/2018] [Indexed: 01/07/2023] Open
Abstract
This article describes the discovery and use of the South American cinchona bark and its main therapeutic (and toxic) alkaloids, quinine and quinidine. Since the introduction of cinchona to Europe in the 17th century, it played a role in treating emperors and peasants and was central to colonialism and wars. Over those 400 years, the medical use of cinchona alkaloids has evolved from bark extracts to chemical synthesis and controlled clinical trials. At the present time, the use of quinine and quinidine has declined, to a large extent due to their toxicity. However, quinine is still being prescribed in resource-limited settings, in severe malaria, and in pregnant women, and quinidine made a limited comeback in the treatment of several cardiac and neurological syndromes. In addition, the article presents more recent studies which improved our understanding of cinchona alkaloids' pharmacology. The knowledge gained through these studies will hopefully lead to a wider use of these drugs in precision medicine and to design of new generation, safer quinine and quinidine derivatives.
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Affiliation(s)
- Sara Eyal
- Institute for Drug Research, School of Pharmacy, The Hebrew University of Jerusalem, Jerusalem 91120, Israel.
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SAKUTA Y, TAKEHARA I, TSUNODA KI, SATO K. Development of a Microfluidic System Comprising Dialysis and Secretion Components for a Bioassay of Renal Clearance. ANAL SCI 2018; 34:1073-1078. [DOI: 10.2116/analsci.18p141] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yu SAKUTA
- School of Science and Technology, Gunma University
| | | | | | - Kiichi SATO
- School of Science and Technology, Gunma University
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Liu K, Zheng D, Lei H, Liu J, Lei J, Wang L, Ma X. Development of Novel Lignin-Based Targeted Polymeric Nanoparticle Platform for Efficient Delivery of Anticancer Drugs. ACS Biomater Sci Eng 2018; 4:1730-1737. [PMID: 33445330 DOI: 10.1021/acsbiomaterials.8b00260] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The clinical applications of natural anticancer drugs are being restricted by poor water solubility, fast clearance in the circulation, lack of targeting to tumor cells, and poor tissue penetration. To address these problems, in this study, we developed a novel lignin-based targeted polymeric nanoparticles (NPs) platform, folic acid-polyethylene glycol-alkaline lignin conjugates (FA-PEG-AL), via self-assembly for delivery of anticancer drug (hydroxyl camptothecin, HCPT). These lignin-based nanoparticles had moderate particle size (∼150 nm) with a narrow size distribution (PDI < 0.1), exhibited excellent biocompatibility, high drug loading efficiency (∼24.2 wt % of HCPT), prolonged blood circulation time (∼7-fold of free HCPT), and enhanced cellular uptake (∼5-fold of free HCPT). Besides, the drug biodistribution study confirmed preferred accumulation of FA-PEG-AL/HCPT NPs in tumor tissue. Subsequent tumor xenograft test revealed superior tumor suppression efficacy and reduced side effects of FA-PEG-AL/HCPT NPs compared with free HCPT. Therefore, the prepared lignin-based FA-PEG-AL/HCPT NPs would be a promising candidate for anticancer drugs delivery.
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Affiliation(s)
- Kefeng Liu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Dan Zheng
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Hantian Lei
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Jing Liu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Jiandu Lei
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Luying Wang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, P. R. China
| | - Xingyuan Ma
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
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32
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Zha W. Transporter-mediated natural product-drug interactions for the treatment of cardiovascular diseases. J Food Drug Anal 2017; 26:S32-S44. [PMID: 29703385 PMCID: PMC9326887 DOI: 10.1016/j.jfda.2017.11.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/18/2017] [Accepted: 11/21/2017] [Indexed: 12/17/2022] Open
Abstract
The growing use of natural products in cardiovascular (CV) patients has been greatly raising the concerns about potential natural product–CV drug interactions. Some of these may lead to unexpected cardiovascular adverse effects and it is, therefore, essential to identify or predict potential natural product–CV drug interactions, and to understand the underlying mechanisms. Drug transporters are important determinants for the pharmacokinetics of drugs and alterations of drug transport has been recognized as one of the major causes of natural product–drug interactions. In last two decades, many CV drugs (e.g., angiotensin II receptor blockers, beta-blockers and statins) have been identified to be substrates and inhibitors of the solute carrier (SLC) transporters and the ATP-binding cassette (ABC) transporters, which are two major transporter superfamilies. Meanwhile, in vitro and in vivo studies indicate that a growing number of natural products showed cardioprotective effects (e.g., gingko biloba, danshen and their active ingredients) are also substrates and inhibitors of drug transporters. Thus, to understand transporter-mediated natural product–CV drug interactions is important and some transporter-mediated interactions have already shown to have clinical relevance. In this review, we review the current knowledge on the role of ABC and SLC transporters in CV therapy, as well as transporter modulation by natural products used in CV diseases and their induced natural product–CV drug interactions through alterations of drug transport. We hope our review will aid in a comprehensive summary of transporter-mediated natural product–CV drug interactions and help public and physicians understand these type of interactions.
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Affiliation(s)
- Weibin Zha
- MyoKardia, South San Francisco, CA, USA.
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33
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Rivinius R, Helmschrott M, Ruhparwar A, Rahm AK, Darche FF, Thomas D, Bruckner T, Ehlermann P, Katus HA, Doesch AO. Chronic digitalis therapy in patients before heart transplantation is an independent risk factor for increased posttransplant mortality. Ther Clin Risk Manag 2017; 13:1399-1407. [PMID: 29075124 PMCID: PMC5648316 DOI: 10.2147/tcrm.s147062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Objectives Digitalis therapy (digoxin or digitoxin) in patients with heart failure is subject to an ongoing debate. Recent data suggest an increased mortality in patients receiving digitalis. This study investigated the effects of chronic digitalis therapy prior to heart transplantation (HTX) on posttransplant outcomes. Patients and methods This was a retrospective, observational, single-center study. It comprised 530 adult patients who were heart-transplanted at Heidelberg University Hospital between 1989 and 2012. Patients with digitalis prior to HTX (≥3 months) were compared to those without (no or <3 months of digitalis). Patients with digitalis were further subdivided into patients receiving digoxin or digitoxin. Primary outcomes were early posttransplant atrial fibrillation and mortality. Results A total of 347 patients (65.5%) had digitalis before HTX. Of these, 180 received digoxin (51.9%) and 167 received digitoxin (48.1%). Patients with digitalis before HTX had a significantly lower 30-day (P=0.0148) and 2-year (P=0.0473) survival. There was no significant difference between digoxin and digitoxin in 30-day (P=0.9466) or 2-year (P=0.0723) survival. Multivariate analysis for posttransplant 30-day mortality showed pretransplant digitalis therapy as an independent risk factor (hazard ratio =2.097, CI: 1.036–4.248, P=0.0397). Regarding atrial fibrillation in the early posttransplant period, there was neither a statistically significant difference between patients with and without digitalis (P=0.1327) nor between patients with digoxin or digitoxin (P=0.5867). Conclusion Digitalis in patients before HTX is an independent risk factor for increased posttransplant mortality.
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Affiliation(s)
- Rasmus Rivinius
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg
| | - Matthias Helmschrott
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg
| | - Arjang Ruhparwar
- Department of Cardiac Surgery, Heidelberg University Hospital, Heidelberg
| | - Ann-Kathrin Rahm
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg.,Faculty of Medicine, University of Heidelberg, Heidelberg
| | - Fabrice F Darche
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg
| | - Dierk Thomas
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg
| | - Tom Bruckner
- Institute for Medical Biometry and Informatics, University of Heidelberg, Heidelberg
| | - Philipp Ehlermann
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg
| | - Hugo A Katus
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg
| | - Andreas O Doesch
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg.,Asklepios Klinik Bad Salzungen GmbH, Department of Pneumology and Oncology, Bad Salzungen, Germany
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Abstract
Transporters in proximal renal tubules contribute to the disposition of numerous drugs. Furthermore, the molecular mechanisms of tubular secretion have been progressively elucidated during the past decades. Organic anions tend to be secreted by the transport proteins OAT1, OAT3 and OATP4C1 on the basolateral side of tubular cells, and multidrug resistance protein (MRP) 2, MRP4, OATP1A2 and breast cancer resistance protein (BCRP) on the apical side. Organic cations are secreted by organic cation transporter (OCT) 2 on the basolateral side, and multidrug and toxic compound extrusion (MATE) proteins MATE1, MATE2/2-K, P-glycoprotein, organic cation and carnitine transporter (OCTN) 1 and OCTN2 on the apical side. Significant drug-drug interactions (DDIs) may affect any of these transporters, altering the clearance and, consequently, the efficacy and/or toxicity of substrate drugs. Interactions at the level of basolateral transporters typically decrease the clearance of the victim drug, causing higher systemic exposure. Interactions at the apical level can also lower drug clearance, but may be associated with higher renal toxicity, due to intracellular accumulation. Whereas the importance of glomerular filtration in drug disposition is largely appreciated among clinicians, DDIs involving renal transporters are less well recognized. This review summarizes current knowledge on the roles, quantitative importance and clinical relevance of these transporters in drug therapy. It proposes an approach based on substrate-inhibitor associations for predicting potential tubular-based DDIs and preventing their adverse consequences. We provide a comprehensive list of known drug interactions with renally-expressed transporters. While many of these interactions have limited clinical consequences, some involving high-risk drugs (e.g. methotrexate) definitely deserve the attention of prescribers.
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Affiliation(s)
- Anton Ivanyuk
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland.
| | - Françoise Livio
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland
| | - Jérôme Biollaz
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland
| | - Thierry Buclin
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland
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Lee SC, Arya V, Yang X, Volpe DA, Zhang L. Evaluation of transporters in drug development: Current status and contemporary issues. Adv Drug Deliv Rev 2017; 116:100-118. [PMID: 28760687 DOI: 10.1016/j.addr.2017.07.020] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/19/2017] [Accepted: 07/26/2017] [Indexed: 01/22/2023]
Abstract
Transporters govern the access of molecules to cells or their exit from cells, thereby controlling the overall distribution of drugs to their intracellular site of action. Clinically relevant drug-drug interactions mediated by transporters are of increasing interest in drug development. Drug transporters, acting alone or in concert with drug metabolizing enzymes, can play an important role in modulating drug absorption, distribution, metabolism and excretion, thus affecting the pharmacokinetics and/or pharmacodynamics of a drug. The drug interaction guidance documents from regulatory agencies include various decision criteria that may be used to predict the need for in vivo assessment of transporter-mediated drug-drug interactions. Regulatory science research continues to assess the prediction performances of various criteria as well as to examine the strength and limitations of each prediction criterion to foster discussions related to harmonized decision criteria that may be used to facilitate global drug development. This review discusses the role of transporters in drug development with a focus on methodologies in assessing transporter-mediated drug-drug interactions, challenges in both in vitro and in vivo assessments of transporters, and emerging transporter research areas including biomarkers, assessment of tissue concentrations, and effect of diseases on transporters.
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Affiliation(s)
- Sue-Chih Lee
- Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Vikram Arya
- Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Xinning Yang
- Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Donna A Volpe
- Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD, USA
| | - Lei Zhang
- Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD, USA.
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Cellular Models and In Vitro Assays for the Screening of modulators of P-gp, MRP1 and BCRP. Molecules 2017; 22:molecules22040600. [PMID: 28397762 PMCID: PMC6153761 DOI: 10.3390/molecules22040600] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/24/2017] [Accepted: 03/28/2017] [Indexed: 12/12/2022] Open
Abstract
Adenosine triphosphate (ATP)-binding cassette (ABC) transporters are highly expressed in tumor cells, as well as in organs involved in absorption and secretion processes, mediating the ATP-dependent efflux of compounds, both endogenous substances and xenobiotics, including drugs. Their expression and activity levels are modulated by the presence of inhibitors, inducers and/or activators. In vitro, ex vivo and in vivo studies with both known and newly synthesized P-glycoprotein (P-gp) inducers and/or activators have shown the usefulness of these transport mechanisms in reducing the systemic exposure and specific tissue access of potentially harmful compounds. This article focuses on the main ABC transporters involved in multidrug resistance [P-gp, multidrug resistance-associated protein 1 (MRP1) and breast cancer resistance protein (BCRP)] expressed in tissues of toxicological relevance, such as the blood-brain barrier, cardiovascular system, liver, kidney and intestine. Moreover, it provides a review of the available cellular models, in vitro and ex vivo assays for the screening and selection of safe and specific inducers and activators of these membrane transporters. The available cellular models and in vitro assays have been proposed as high throughput and low-cost alternatives to excessive animal testing, allowing the evaluation of a large number of compounds.
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Affiliation(s)
- Gerhard F. Ecker
- University; of Vienna; Department of Pharmaceutical Chemistry; Althanstrasse 14 1090 Wien Austria
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Tounsi N, Trabelsi I, Kerkeni E, Grissa MH, Fredj N, Sekma A, Mzali M, Hellara I, Monastiri K, Douki W, Nouira S. ABCB1 and SLCO1B3 Gene Polymorphisms and Their Impact on Digoxin Pharmacokinetics in Atrial Fibrillation Patients among the Tunisian Population. Pharmacology 2017; 99:250-258. [DOI: 10.1159/000457906] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 01/24/2017] [Indexed: 12/17/2022]
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40
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Koepple C, Scherer D, Seyler C, Scholz E, Thomas D, Katus HA, Zitron E. Dual Mechanism for Inhibition of Inwardly Rectifying Kir2.x Channels by Quinidine Involving Direct Pore Block and PIP 2-interference. J Pharmacol Exp Ther 2017; 361:209-218. [PMID: 28188270 DOI: 10.1124/jpet.116.238287] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 02/08/2017] [Indexed: 11/22/2022] Open
Abstract
Class IA antiarrhythmic drug quinidine was one of the first clinically used compounds to terminate atrial fibrillation and acts as multichannel inhibitor with well-documented inhibitory effects on several cardiac potassium channels. In the mammalian heart, heteromeric assembly of Kir2.1-2.3 channels underlies IK1 current. Although a low-affinity block of quinidine on Kir2.1 has already been described, a comparative analysis of effects on other Kir2.x channels has not been performed to date. Therefore, we analyzed the effects of quinidine on wild-type and mutant Kir2.x channels in the Xenopus oocyte expression system. Quinidine exerted differential inhibitory effects on Kir2.x channels with the highest affinity toward Kir2.3 subunits. Onset of block was slow and solely reversible in Kir2.2 subunits. Quinidine inhibited Kir2.x currents in a voltage-independent manner. By means of comparative Ala-scanning mutagenesis, we further found that residues E224, F254, D259, and E299 are essential for quinidine block in Kir2.1 subunits. Analogously, quinidine mediated Kir2.3 inhibition by binding corresponding residues E216, D247, D251, and E291. In contrast, Kir2.2 current block merely involved corresponding residue D260. Using channel mutants with altered (phosphatidylinositol 4,5-bisphosphate PIP2) affinities, we were able to demonstrate that high PIP2 affinities (i.e., Kir2.3 I214L) correlate with low quinidine sensitivity. Inversely, mutant channels interacting only weakly with PIP2 (i.e., Kir2.1 K182Q, and L221I) are prone to a higher inhibitory effect. Thus, we conclude that inhibition of Kir2.x channels by quinidine is mediated by joint modes of action involving direct cytoplasmic pore block and an impaired channel stabilization via interference with PIP2.
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Affiliation(s)
- Christoph Koepple
- Department of Cardiology, Medical University Hospital Heidelberg, Heidelberg, Germany (C.K., D.S., C.S., E.S., D.T., H.A.K., E.Z.); DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany (C.S., E.S., D.T., H.A.K., E.Z.); and Department for Hand-, Plastic- and Reconstructive Surgery, BG Unfallklinik Ludwigshafen, University of Heidelberg, Heidelberg, Germany (C.K.)
| | - Daniel Scherer
- Department of Cardiology, Medical University Hospital Heidelberg, Heidelberg, Germany (C.K., D.S., C.S., E.S., D.T., H.A.K., E.Z.); DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany (C.S., E.S., D.T., H.A.K., E.Z.); and Department for Hand-, Plastic- and Reconstructive Surgery, BG Unfallklinik Ludwigshafen, University of Heidelberg, Heidelberg, Germany (C.K.)
| | - Claudia Seyler
- Department of Cardiology, Medical University Hospital Heidelberg, Heidelberg, Germany (C.K., D.S., C.S., E.S., D.T., H.A.K., E.Z.); DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany (C.S., E.S., D.T., H.A.K., E.Z.); and Department for Hand-, Plastic- and Reconstructive Surgery, BG Unfallklinik Ludwigshafen, University of Heidelberg, Heidelberg, Germany (C.K.)
| | - Eberhard Scholz
- Department of Cardiology, Medical University Hospital Heidelberg, Heidelberg, Germany (C.K., D.S., C.S., E.S., D.T., H.A.K., E.Z.); DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany (C.S., E.S., D.T., H.A.K., E.Z.); and Department for Hand-, Plastic- and Reconstructive Surgery, BG Unfallklinik Ludwigshafen, University of Heidelberg, Heidelberg, Germany (C.K.)
| | - Dierk Thomas
- Department of Cardiology, Medical University Hospital Heidelberg, Heidelberg, Germany (C.K., D.S., C.S., E.S., D.T., H.A.K., E.Z.); DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany (C.S., E.S., D.T., H.A.K., E.Z.); and Department for Hand-, Plastic- and Reconstructive Surgery, BG Unfallklinik Ludwigshafen, University of Heidelberg, Heidelberg, Germany (C.K.)
| | - Hugo A Katus
- Department of Cardiology, Medical University Hospital Heidelberg, Heidelberg, Germany (C.K., D.S., C.S., E.S., D.T., H.A.K., E.Z.); DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany (C.S., E.S., D.T., H.A.K., E.Z.); and Department for Hand-, Plastic- and Reconstructive Surgery, BG Unfallklinik Ludwigshafen, University of Heidelberg, Heidelberg, Germany (C.K.)
| | - Edgar Zitron
- Department of Cardiology, Medical University Hospital Heidelberg, Heidelberg, Germany (C.K., D.S., C.S., E.S., D.T., H.A.K., E.Z.); DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany (C.S., E.S., D.T., H.A.K., E.Z.); and Department for Hand-, Plastic- and Reconstructive Surgery, BG Unfallklinik Ludwigshafen, University of Heidelberg, Heidelberg, Germany (C.K.)
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Ledwitch KV, Roberts AG. Cardiovascular Ion Channel Inhibitor Drug-Drug Interactions with P-glycoprotein. AAPS JOURNAL 2016; 19:409-420. [PMID: 28028729 DOI: 10.1208/s12248-016-0023-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 11/19/2016] [Indexed: 12/31/2022]
Abstract
P-glycoprotein (Pgp) is an ATP-binding cassette (ABC) transporter that plays a major role in cardiovascular drug disposition by effluxing a chemically and structurally diverse range of cardiovascular therapeutics. Unfortunately, drug-drug interactions (DDIs) with the transporter have become a major roadblock to effective cardiovascular drug administration because they can cause adverse drug reactions (ADRs) or reduce the efficacy of drugs. Cardiovascular ion channel inhibitors are particularly susceptible to DDIs and ADRs with Pgp because they often have low therapeutic indexes and are commonly coadministered with other drugs that are also Pgp substrates. DDIs from cardiovascular ion channel inhibitors with the transporter occur because of inhibition or induction of the transporter and the transporter's tissue and cellular localization. Inhibiting Pgp can increase absorption and reduce excretion of drugs, leading to elevated drug plasma concentrations and drug toxicity. In contrast, inducing Pgp can have the opposite effect by reducing the drug plasma concentration and its efficacy. A number of in vitro and in vivo studies have already demonstrated DDIs from several cardiovascular ion channel inhibitors with human Pgp and its animal analogs, including verapamil, digoxin, and amiodarone. In this review, Pgp-mediated DDIs and their effects on pharmacokinetics for different categories of cardiovascular ion channel inhibitors are discussed. This information is essential for improving pharmacokinetic predictions of cardiovascular therapeutics, for safer cardiovascular drug administration and for mitigating ADRs emanating from Pgp.
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Affiliation(s)
- Kaitlyn V Ledwitch
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W. Green St., Athens, Georgia, 30602, USA
| | - Arthur G Roberts
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W. Green St., Athens, Georgia, 30602, USA.
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Renal drug transporters and their significance in drug-drug interactions. Acta Pharm Sin B 2016; 6:363-373. [PMID: 27709005 PMCID: PMC5045553 DOI: 10.1016/j.apsb.2016.07.013] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/30/2016] [Accepted: 07/07/2016] [Indexed: 12/12/2022] Open
Abstract
The kidney is a vital organ for the elimination of therapeutic drugs and their metabolites. Renal drug transporters, which are primarily located in the renal proximal tubules, play an important role in tubular secretion and reabsorption of drug molecules in the kidney. Tubular secretion is characterized by high clearance capacities, broad substrate specificities, and distinct charge selectivity for organic cations and anions. In the past two decades, substantial progress has been made in understanding the roles of transporters in drug disposition, efficacy, toxicity and drug-drug interactions (DDIs). In the kidney, several transporters are involved in renal handling of organic cation (OC) and organic anion (OA) drugs. These transporters are increasingly recognized as the target for clinically significant DDIs. This review focuses on the functional characteristics of major human renal drug transporters and their involvement in clinically significant DDIs.
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Key Words
- ABC, ATP-binding cassette
- ATP, adenosine triphosphate
- AUC, area under the plasma concentration curve
- BBB, blood–brain barrier
- CHO, Chinese hamster ovary
- CL, plasma clearance
- CLR, renal clearance
- Cmax, maximum plasma concentration
- DDIs, drug–drug interactions
- Drug–drug interactions
- FDA, U.S. Food and Drug Administration
- GSH, glutathione
- HEK, human embryonic kidney
- IC50, half maximal inhibitory concentration
- ITC, International Transporter Consortium
- Ki, inhibitory constant
- MATE, multidrug and toxin extrusion protein
- MPP+, 1-methyl-4-phenylpyridimium
- MRP, multidrug resistance-associated protein
- MSD, membrane-spanning domain
- MW, molecular weight
- NBD, nucleotide-binding domain
- NME, new molecular entity
- NSAID, non-steroidal anti-inflammatory drugs
- Nephrotoxicity
- OA, organic anion
- OAT or Oat, organic anion transporters
- OATP or Oatp, organic anion-transporting peptide
- OC, organic cation
- OCT or Oct, organic cation transporter
- OCTN, Organic zwitterions/cation transporters
- Organic anions
- Organic cations
- P-gp, P-glycoprotein
- PAH, p-aminohippurate
- Renal drug transporters
- SLC, solute carrier
- SNP, single-nucleotide polymorphism
- TEA, tetraethylammonium
- TMD, transmembrane domain
- URAT, urate transporter
- fe, fraction of the absorbed dose excreted unchanged in urine
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Challenges in oral drug delivery of antiretrovirals and the innovative strategies to overcome them. Adv Drug Deliv Rev 2016; 103:105-120. [PMID: 26772138 DOI: 10.1016/j.addr.2015.12.022] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 12/20/2015] [Accepted: 12/28/2015] [Indexed: 01/30/2023]
Abstract
Development of novel drug delivery systems (DDS) represents a promising opportunity to overcome the various bottlenecks associated with the chronic antiretroviral (ARV) therapy of the human immunodeficiency virus (HIV) infection. Oral drug delivery is the most convenient and simplest route of drug administration that involves the swallowing of a pharmaceutical compound with the intention of releasing it into the gastrointestinal tract. In oral delivery, drugs can be formulated in such a way that they are protected from digestive enzymes, acids, etc. and released in different regions of the small intestine and/or the colon. Not surprisingly, with the exception of the subcutaneous enfuvirtide, all the marketed ARVs are administered orally. However, conventional (marketed) and innovative (under investigation) oral delivery systems must overcome numerous challenges, including the acidic gastric environment, and the poor aqueous solubility and physicochemical instability of many of the approved ARVs. In addition, the mucus barrier can prevent penetration and subsequent absorption of the released drug, a phenomenon that leads to lower oral bioavailability and therapeutic concentration in plasma. Moreover, the frequent administration of the cocktail (ARVs are administered at least once a day) favors treatment interruption. To improve the oral performance of ARVs, the design and development of more efficient oral drug delivery systems are called for. The present review highlights various innovative research strategies adopted to overcome the limitations of the present treatment regimens and to enhance the efficacy of the oral ARV therapy in HIV.
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Abstract
The kidney plays a vital role in the elimination of xenobiotics including drugs, toxins, and endogenous metabolites. Renal drug elimination involves 3 major processes: glomerular filtration, tubular secretion, and tubular reabsorption. Although glomerular filtration is a simple unidirectional diffusion process, renal tubular secretion and/or reabsorption can involve saturable processes mediated by multiple highly specialized membrane transport systems. Current research has identified that these transport proteins play a significant role in the efficient removal and/or reabsorption of pharmacological agents. Since the majority of membrane transporters have broad substrate specificity, there is a significant risk for drug-drug interactions through competition for similar transport pathways. This article will focus on the cellular expression, localization, and transport properties of various renal drug transport systems (ie, organic anion, organic cation, nucleoside, and adenosine triphosphate [ATP]-dependent efflux transporters). Specific examples of drugs that are transported by each of these mechanisms will be provided. Clinically relevant drug-drug interactions involving renal drug transporters will be discussed to guide the clinician in understanding and preventing these interactions.
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Affiliation(s)
- Patrick T. Ronaldson
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Toronto
| | - Reina Bendayan
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, University of Toronto,
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Abstract
Since its isolation in the 1930s, digoxin has played a pivotal role in the treatment of cardiac conditions including heart failure and supraventricular tachyarrhythmias. The parasympathomimetic activity makes digoxin a reasonable option for controlling ventricular rate in atrial fibrillation (AF). However, the unique pharmacokinetic properties, electrolyte-dependent effects, and P-glycoprotein drug interactions influence the clinical use of digoxin. In addition, the delayed onset and narrow therapeutic index can make digoxin utilization cumbersome and often necessitates serum drug monitoring. Despite digoxin's extensive history, recent literature has cast doubt on the efficacy and safety of this medication in the population with AF. Large amounts of data suggest digoxin offers no benefit on mortality and may increase the risk of mortality though this was not consistent in all evaluations. While robust, the majority of the available studies are not randomized which limits the ability to draw firm conclusions. The potential risk of mortality must be weighed against the expected benefits of digoxin use to make individualized patient care decisions. Clinicians should refrain from utilizing digoxin monotherapy for rate control in AF when other options are viable.
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Affiliation(s)
- Michael J Scalese
- 1 Department of Pharmacy Practice, Auburn University Harrison School of Pharmacy, Mobile, AL, USA
| | - Dominick J Salvatore
- 2 Division of Pharmacy Practice and Administration, University of Missouri-Kansas City, Kansas City, MI, USA
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Gozalpour E, Wilmer MJ, Bilos A, Masereeuw R, Russel FGM, Koenderink JB. Heterogeneous transport of digitalis-like compounds by P-glycoprotein in vesicular and cellular assays. Toxicol In Vitro 2015; 32:138-45. [PMID: 26708294 DOI: 10.1016/j.tiv.2015.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 12/08/2015] [Accepted: 12/15/2015] [Indexed: 01/28/2023]
Abstract
Digitalis-like compounds (DLCs), the ancient medication of heart failure and Na,K-ATPase inhibitors, are characterized by their toxicity. Drug-drug interactions (DDIs) at absorption and excretion levels play a key role in their toxicity, hence, knowledge about the transporters involved might prevent these unwanted interactions. In the present study, the transport of fourteen DLCs with human P-glycoprotein (P-gp; ABCB1) was studied using a liquid chromatography-mass spectrometry (LC-MS) quantification method. DLC transport by P-gp overexpressing Madin-Darby canine kidney (MDCK) and immortalized human renal cells (ciPTEC) was compared to vesicular DLC transport. Previously, we identified convallatoxin as a substrate using membrane vesicles overexpressing P-gp; however, we could not measure transport of other DLCs in this assay (Gozalpour et al., 2014a). Here, we showed that lipophilic digitoxin, digoxigenin, strophanthidin and proscillaridin A are P-gp substrates in cellular accumulation assays, whereas the less lipophilic convallatoxin was not. P-gp function in the cellular accumulation assays depends on the entrance of lipophilic compounds by passive diffusion, whereas the vesicular transport assay is more appropriate for hydrophilic substrates. In conclusion, we identified digitoxin, digoxigenin, strophanthidin and proscillaridin A as P-gp substrates using cellular accumulation assays and recognized lipophilicity as an important factor in selecting a suitable transport assay.
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Affiliation(s)
- Elnaz Gozalpour
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, The Netherlands
| | - Martijn J Wilmer
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, The Netherlands
| | - Albert Bilos
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, The Netherlands
| | - Rosalinde Masereeuw
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, The Netherlands
| | - Frans G M Russel
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, The Netherlands
| | - Jan B Koenderink
- Department of Pharmacology and Toxicology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, The Netherlands.
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47
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Netsomboon K, Laffleur F, Suchaoin W, Bernkop-Schnürch A. Novel in vitro transport method for screening the reversibility of P-glycoprotein inhibitors. Eur J Pharm Biopharm 2015; 100:9-14. [PMID: 26692501 DOI: 10.1016/j.ejpb.2015.11.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 11/24/2015] [Accepted: 11/30/2015] [Indexed: 01/15/2023]
Abstract
The purpose of this study was to establish a novel in vitro method for screening reversibility of P-glycoprotein (P-gp) inhibitors. Caco-2 cells with 21days of cultivation were used as an in vitro model. Transport of rhodamine 123 in the presence of various inhibitors and after removing of inhibitors was determined. Transport of rhodamine 123 at 4°C and in the secretory direction assured that Caco-2 cells exhibited P-gp function at all time of experiment. The apparent permeability coefficient (Papp) of rhodamine 123 in the presence of verapamil, cyclosporin A, ritonavir, quinidine, N-ethylmaleimide, Cremophor® EL, Tween 80 and poly(acrylic acid)-cysteine-2-mercaptonicotinic acid (PAA-cys-2MNA) was 2.3-, 3.8-, 2.3-, 3.1, 7.5-, 2.1-, 2.9- and 2.5-fold higher than Papp of rhodamine 123 alone. After removing of the inhibitors, Papp decreased to the same range of control except in the case of N-ethylmaleimide which was 2.4-fold higher than the control. These results revealed a reversible inhibition of verapamil, cyclosporin A, ritonavir, quinidine, Cremophor® EL, Tween 80 and PAA-cys-2MNA and an irreversible inhibition of N-ethylmaleimide for P-gp. Thus, this novel established that in vitro method might be an effective tool for screening the reversibility of inhibition of P-gp inhibitors.
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Affiliation(s)
- Kesinee Netsomboon
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Flavia Laffleur
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Wongsakorn Suchaoin
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.
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48
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Helmy SA, El Bedaiwy HM. HPLC Determination of Fexofenadine in Human Plasma For Therapeutic Drug Monitoring and Pharmacokinetic Studies. Biomed Chromatogr 2015; 30:1059-1064. [PMID: 26577375 DOI: 10.1002/bmc.3650] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 11/06/2015] [Accepted: 11/10/2015] [Indexed: 11/05/2022]
Abstract
A simple and sensitive method was developed for fexofenadine determination in human plasma by liquid chromatography with ultraviolet detection. Satisfactory separation was achieved on a Hypersil® BDS C18 column (250 × 4.6 mm, 5μm) using a mobile phase comprising 20 mm sodium dihydrogen phosphate-2 hydrate (pH adjusted to 3 with phosphoric acid)-acetonitrile at a ratio of 52:48, v/v. The elution was isocratic at ambient temperature with a flow rate of 1.0 mL/min. The UV detector was set at 215 nm for the drug and 330 nm for the internal standared (tinidazole). The total time for a chromatographic separation was ~6.5 min. Linearity was demonstrated over the concentration range 0.01-4 μg/mL. The observed within- and between-day assay precision ranged from 0.346 to 13.6%; accuracy varied between 100.4 and 111.2%. This method was successfully applied for therapeutic drug monitoring in patients treated with clinical doses of fexofenadine and for pharmacokinetic studies. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- S A Helmy
- Department of Clinical and Hospital Pharmacy, Faculty of Pharmacy, Taibah University, AL-Madinah AL-Munawarah, Kingdom of Saudi Arabia.,Department of Pharmaceutics, Faculty of Pharmacy, Damanhour University, Damanhour, Egypt
| | - H M El Bedaiwy
- Department of Pharmaceutics, Faculty of Pharmacy, Damanhour University, Damanhour, Egypt
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49
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Nigam SK, Wu W, Bush KT, Hoenig MP, Blantz RC, Bhatnagar V. Handling of Drugs, Metabolites, and Uremic Toxins by Kidney Proximal Tubule Drug Transporters. Clin J Am Soc Nephrol 2015; 10:2039-49. [PMID: 26490509 DOI: 10.2215/cjn.02440314] [Citation(s) in RCA: 176] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 09/28/2014] [Indexed: 01/22/2023]
Abstract
The proximal tubule of the kidney plays a crucial role in the renal handling of drugs (e.g., diuretics), uremic toxins (e.g., indoxyl sulfate), environmental toxins (e.g., mercury, aristolochic acid), metabolites (e.g., uric acid), dietary compounds, and signaling molecules. This process is dependent on many multispecific transporters of the solute carrier (SLC) superfamily, including organic anion transporter (OAT) and organic cation transporter (OCT) subfamilies, and the ATP-binding cassette (ABC) superfamily. We review the basic physiology of these SLC and ABC transporters, many of which are often called drug transporters. With an emphasis on OAT1 (SLC22A6), the closely related OAT3 (SLC22A8), and OCT2 (SLC22A2), we explore the implications of recent in vitro, in vivo, and clinical data pertinent to the kidney. The analysis of murine knockouts has revealed a key role for these transporters in the renal handling not only of drugs and toxins but also of gut microbiome products, as well as liver-derived phase 1 and phase 2 metabolites, including putative uremic toxins (among other molecules of metabolic and clinical importance). Functional activity of these transporters (and polymorphisms affecting it) plays a key role in drug handling and nephrotoxicity. These transporters may also play a role in remote sensing and signaling, as part of a versatile small molecule communication network operative throughout the body in normal and diseased states, such as AKI and CKD.
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Affiliation(s)
- Sanjay K Nigam
- Department of Medicine, Department of Pediatrics, Department of Cell & Molecular Medicine,
| | | | | | - Melanie P Hoenig
- Division of Nephrology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts
| | - Roland C Blantz
- Division of Nephrology-Hypertension, and Veterans Affairs San Diego Healthcare System, San Diego, California; and
| | - Vibha Bhatnagar
- Division of Family & Preventative Medicine, University of California-San Diego, La Jolla, California
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50
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Hodaei D, Baradaran B, Valizadeh H, Zakeri-Milani P. Effects of polyethylene glycols on intestinal efflux pump expression and activity in Caco-2 cells. BRAZ J PHARM SCI 2015. [DOI: 10.1590/s1984-82502015000300026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The present study was planned to investigate the influence of polyethylene glycols (PEGs) on the activity and expression of P-glycoprotein (P-gp). Sub-toxic concentrations of PEGs in Caco-2 cells were determined using the MTT test assay. Then the measurement of Rhodamine-123 (Rho-123) uptake, a P-gp fluorescence substrate, in Caco-2 cells confronting PEG 400 (1% and 2% w/v), PEG 4000 (2% and 4% w/v), PEG 6000 (2% and 4% w/v), PEG 10000 (2% and 4% w/v), PEG 15000 (1% and 2% w/v), and PEG 35000 (2% and 4% w/v) overnight was taken to elucidate whether non-toxic concentrations of PEGs are able to impact P-gp activity. Furthermore, western blotting was carried out to investigate P-gp protein expression. The results showed that PEG 400 at concentrations of 1% (w/v) and 2% (w/v) and PEG 6000 at the concentration of 4% (w/v) are notably capable of blocking P-gp. Based on the obtained results it is concluded that the mentioned excipients could be used to obstruct P-gp efflux transporter in order to increase the bioavailability of co-administered substrate drug.
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Affiliation(s)
- Darya Hodaei
- Tabriz University of Medical Sciences, Iran; Tabriz University of Medical Sciences, Iran
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