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Enhancing the accumulation level of 3-[ 18F]fluoro-L-α-methyltyrosine in tumors by preloading probenecid. Nucl Med Biol 2021; 104-105:47-52. [PMID: 34896813 DOI: 10.1016/j.nucmedbio.2021.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/24/2021] [Accepted: 11/29/2021] [Indexed: 11/23/2022]
Abstract
INTRODUCTION 3-[18F]fluoro-α-methyl-L-tyrosine ([18F]FAMT) is a promising amino acid tracer targeting L-type amino acid transporter 1 (LAT1). One concern regarding the diagnosis using [18F]FAMT is the possibility of false-negative findings because of its relatively low accumulation level even in malignant tumors. Moreover, preloading probenecid, an organic anion transporter inhibitor, markedly increased the tumor accumulation level of radioiodine-labeled α-methyltyrosine. In this study, we evaluated the usefulness of preloading probenecid in improving the tumor-imaging capability of [18F]FAMT. METHODS Three biodistribution studies of [18F]FAMT were conducted in normal mice to elucidate the usefulness of probenecid preloading. Later, a biodistribution study and positron emission tomography (PET) imaging of [18F]FAMT were conducted with or without probenecid injection in tumor-bearing mice. RESULTS Probenecid preloading significantly delayed blood clearance and consequently enhanced the accumulation of [18F]FAMT in the pancreas, a LAT1-positive organ. The effects of probenecid preloading were independent of the administration route. Tumor accumulation level in the biodistribution study and the maximum standardized uptake value in tumors on PET imaging of the probenecid preloading group were significantly higher than those of the control (without probenecid injection) group in tumor-bearing mice. CONCLUSIONS Preloading probenecid significantly delayed blood clearance and consequently enhanced the accumulation of [18F]FAMT in tumors. These results indicate that preloading probenecid could improve the diagnostic accuracy of [18F]FAMT.
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Willemin ME, Van Der Made TK, Pijpers I, Dillen L, Kunze A, Jonkers S, Steemans K, Tuytelaars A, Jacobs F, Monshouwer M, Scotcher D, Rostami-Hodjegan A, Galetin A, Snoeys J. Clinical Investigation on Endogenous Biomarkers to Predict Strong OAT-Mediated Drug-Drug Interactions. Clin Pharmacokinet 2021; 60:1187-1199. [PMID: 33840062 DOI: 10.1007/s40262-021-01004-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Endogenous biomarkers are promising tools to assess transporter-mediated drug-drug interactions early in humans. METHODS We evaluated on a common and validated in vitro system the selectivity of 4-pyridoxic acid (PDA), homovanillic acid (HVA), glycochenodeoxycholate-3-sulphate (GCDCA-S) and taurine towards different renal transporters, including multidrug resistance-associated protein, and assessed the in vivo biomarker sensitivity towards the strong organic anion transporter (OAT) inhibitor probenecid at 500 mg every 6 h to reach close to complete OAT inhibition. RESULTS PDA and HVA were substrates of the OAT1/2/3, OAT4 (PDA only) and multidrug resistance-associated protein 4; GCDCA-S was more selective, having affinity only towards OAT3 and multidrug resistance-associated protein 2. Taurine was not a substrate of any of the investigated transporters under the in vitro conditions tested. Plasma exposure of PDA and HVA significantly increased and the renal clearance of GCDCA-S, PDA and HVA decreased; the magnitude of these changes was comparable to those of known clinical OAT probe substrates. PDA and GCDCA-S were the most promising endogenous biomarkers of the OAT pathway activity: PDA plasma exposure was the most sensitive to probenecid inhibition, and, in contrast, GCDCA-S was the most sensitive OAT biomarker based on renal clearance, with higher selectivity towards the OAT3 transporter. CONCLUSIONS The current findings illustrate a clear benefit of measuring PDA plasma exposure during phase I studies when a clinical drug candidate is suspected to be an OAT inhibitor based on in vitro data. Subsequently, combined monitoring of PDA and GCDCA-S in both urine and plasma is recommended to tease out the involvement of OAT1/3 in the inhibition interaction. CLINICAL TRIAL REGISTRATION EudraCT number: 2016-003923-49.
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Affiliation(s)
- Marie-Emilie Willemin
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium.
| | - Thomas K Van Der Made
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, Division of Pharmacy and Optometry, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Ils Pijpers
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Lieve Dillen
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Annett Kunze
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Sophie Jonkers
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Kathleen Steemans
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - An Tuytelaars
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Frank Jacobs
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Mario Monshouwer
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Daniel Scotcher
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, Division of Pharmacy and Optometry, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, Division of Pharmacy and Optometry, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Aleksandra Galetin
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, Division of Pharmacy and Optometry, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - Jan Snoeys
- Drug Metabolism and Pharmacokinetics, Janssen Pharmaceutical Companies of Johnson & Johnson, Turnhoutseweg 30, 2340, Beerse, Belgium
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3
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Britz H, Hanke N, Taub ME, Wang T, Prasad B, Fernandez É, Stopfer P, Nock V, Lehr T. Physiologically Based Pharmacokinetic Models of Probenecid and Furosemide to Predict Transporter Mediated Drug-Drug Interactions. Pharm Res 2020; 37:250. [PMID: 33237382 PMCID: PMC7688195 DOI: 10.1007/s11095-020-02964-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/26/2020] [Indexed: 12/14/2022]
Abstract
Purpose To provide whole-body physiologically based pharmacokinetic (PBPK) models of the potent clinical organic anion transporter (OAT) inhibitor probenecid and the clinical OAT victim drug furosemide for their application in transporter-based drug-drug interaction (DDI) modeling. Methods PBPK models of probenecid and furosemide were developed in PK-Sim®. Drug-dependent parameters and plasma concentration-time profiles following intravenous and oral probenecid and furosemide administration were gathered from literature and used for model development. For model evaluation, plasma concentration-time profiles, areas under the plasma concentration–time curve (AUC) and peak plasma concentrations (Cmax) were predicted and compared to observed data. In addition, the models were applied to predict the outcome of clinical DDI studies. Results The developed models accurately describe the reported plasma concentrations of 27 clinical probenecid studies and of 42 studies using furosemide. Furthermore, application of these models to predict the probenecid-furosemide and probenecid-rifampicin DDIs demonstrates their good performance, with 6/7 of the predicted DDI AUC ratios and 4/5 of the predicted DDI Cmax ratios within 1.25-fold of the observed values, and all predicted DDI AUC and Cmax ratios within 2.0-fold. Conclusions Whole-body PBPK models of probenecid and furosemide were built and evaluated, providing useful tools to support the investigation of transporter mediated DDIs. Supplementary Information The online version contains supplementary material available at 10.1007/s11095-020-02964-z.
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Affiliation(s)
- Hannah Britz
- Clinical Pharmacy, Saarland University, Campus C2 2, 66123, Saarbrücken, Germany
| | - Nina Hanke
- Clinical Pharmacy, Saarland University, Campus C2 2, 66123, Saarbrücken, Germany
| | - Mitchell E Taub
- Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., Ridgefield, Connecticut, USA
| | - Ting Wang
- Drug Metabolism and Pharmacokinetics, Boehringer Ingelheim Pharmaceuticals Inc., Ridgefield, Connecticut, USA
| | - Bhagwat Prasad
- Department of Pharmaceutical Sciences, Washington State University, Spokane, Washington, USA
| | - Éric Fernandez
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | - Peter Stopfer
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | - Valerie Nock
- Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | - Thorsten Lehr
- Clinical Pharmacy, Saarland University, Campus C2 2, 66123, Saarbrücken, Germany.
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Zhou D, Xu Y, Wang Y, Li J, Gui C, Zhang H. Interaction of Organic Anion Transporter 3-Mediated Uptake of Steviol Acyl Glucuronide, a Major Metabolite of Rebaudioside A, with Selected Drugs. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:1579-1587. [PMID: 31760750 DOI: 10.1021/acs.jafc.9b05808] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Organic anion transporter 3 (OAT3) plays a critical role in the renal excretion of many xenobiotics. Because steviol acyl glucuronide (SVAG), an OAT3 substrate, is the major circulating metabolite after oral ingestion of steviol glycosides and is excreted into the urine, inhibition of OAT3 activity may alter pharmacokinetic profiles of SVAG. The present study showed that drugs such as probenecid and glimepiride displayed potent inhibition toward the OAT3-mediated SVAG transport, with IC50 values of 4.9 and 0.8 μM, respectively. No species differences were observed. Probenecid and glimepiride could significantly elevate plasma concentrations of SVAG after oral administration of rebaudioside A, with significant increases in plasma maximum (Cmax) and area under the plasma time-concentration curve values. The inhibitory effect on the OAT3-mediated SVAG transport exemplified a unique case between drugs and the metabolite of a food additive. Our data suggest that caution should be exercised when giving steviol glycoside products to human subjects with compromised renal function.
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Affiliation(s)
- Dandan Zhou
- College of Pharmaceutical Sciences , Soochow University , Suzhou 215006 , China
| | - Yunting Xu
- College of Pharmaceutical Sciences , Soochow University , Suzhou 215006 , China
| | - Yedong Wang
- College of Pharmaceutical Sciences , Soochow University , Suzhou 215006 , China
| | - Jiajun Li
- College of Pharmaceutical Sciences , Soochow University , Suzhou 215006 , China
| | - Chunshan Gui
- College of Pharmaceutical Sciences , Soochow University , Suzhou 215006 , China
| | - Hongjian Zhang
- College of Pharmaceutical Sciences , Soochow University , Suzhou 215006 , China
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Liu X. Transporter-Mediated Drug-Drug Interactions and Their Significance. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1141:241-291. [PMID: 31571167 DOI: 10.1007/978-981-13-7647-4_5] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Drug transporters are considered to be determinants of drug disposition and effects/toxicities by affecting the absorption, distribution, and excretion of drugs. Drug transporters are generally divided into solute carrier (SLC) family and ATP binding cassette (ABC) family. Widely studied ABC family transporters include P-glycoprotein (P-GP), breast cancer resistance protein (BCRP), and multidrug resistance proteins (MRPs). SLC family transporters related to drug transport mainly include organic anion-transporting polypeptides (OATPs), organic anion transporters (OATs), organic cation transporters (OCTs), organic cation/carnitine transporters (OCTNs), peptide transporters (PEPTs), and multidrug/toxin extrusions (MATEs). These transporters are often expressed in tissues related to drug disposition, such as the small intestine, liver, and kidney, implicating intestinal absorption of drugs, uptake of drugs into hepatocytes, and renal/bile excretion of drugs. Most of therapeutic drugs are their substrates or inhibitors. When they are comedicated, serious drug-drug interactions (DDIs) may occur due to alterations in intestinal absorption, hepatic uptake, or renal/bile secretion of drugs, leading to enhancement of their activities or toxicities or therapeutic failure. This chapter will illustrate transporter-mediated DDIs (including food drug interaction) in human and their clinical significances.
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Affiliation(s)
- Xiaodong Liu
- China Pharmaceutical University, Nanjing, China.
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Feng B, Varma MV. Evaluation and Quantitative Prediction of Renal Transporter-Mediated Drug-Drug Interactions. J Clin Pharmacol 2017; 56 Suppl 7:S110-21. [PMID: 27385169 DOI: 10.1002/jcph.702] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 12/18/2015] [Accepted: 12/28/2015] [Indexed: 12/22/2022]
Abstract
With numerous drugs cleared renally, inhibition of uptake transporters localized on the basolateral membrane of renal proximal tubule cells, eg, organic anion transporters (OATs) and organic cation transporters (OCTs), may lead to clinically meaningful drug-drug interactions (DDIs). Additionally, clinical evidence for the possible involvement of efflux transporters, such as P-glycoprotein (P-gp) and multidrug and toxin extrusion protein 1/2-K (MATE1/2-K), in the renal DDIs is emerging. Herein, we review recent progress regarding mechanistic understanding of transporter-mediated renal DDIs as well as the quantitative predictability of renal DDIs using static and physiologically based pharmacokinetic (PBPK) models. Generally, clinical DDI data suggest that the magnitude of plasma exposure changes attributable to renal DDIs is less than 2-fold, unlike the DDIs associated with inhibition of cytochrome P-450s and/or hepatic uptake transporters. It is concluded that although there is a need for risk assessment early in drug development, current available data imply that safety concerns related to the renal DDIs are generally low. Nevertheless, consideration must be given to the therapeutic index of the victim drug and potential risk in a specific patient population (eg, renal impairment). Finally, in vitro transporter data and clinical pharmacokinetic parameters obtained from the first-in-human studies have proven useful in support of quantitative prediction of DDIs associated with inhibition of renal secretory transporters, OATs or OCTs.
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Affiliation(s)
- Bo Feng
- Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Global Research & Development, Groton, CT, USA
| | - Manthena V Varma
- Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Global Research & Development, Groton, CT, USA
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Posada MM, Cannady EA, Payne CD, Zhang X, Bacon JA, Pak YA, Higgins JW, Shahri N, Hall SD, Hillgren KM. Prediction of Transporter-Mediated Drug-Drug Interactions for Baricitinib. Clin Transl Sci 2017; 10:509-519. [PMID: 28749581 PMCID: PMC6402191 DOI: 10.1111/cts.12486] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 05/30/2017] [Indexed: 01/05/2023] Open
Abstract
Baricitinib, an oral selective Janus kinase 1 and 2 inhibitor, undergoes active renal tubular secretion. Baricitinib was not predicted to inhibit hepatic and renal uptake and efflux drug transporters, based on the ratio of the unbound maximum eliminating-organ inlet concentration and the in vitro half-maximal inhibitory concentrations (IC50 ). In vitro, baricitinib was a substrate for organic anion transporter (OAT)3, multidrug and toxin extrusion protein (MATE)2-K, P-glycoprotein (P-gp), and breast cancer resistance protein (BCRP). Probenecid, a strong OAT3 inhibitor, increased the area under the concentration-time curve from time zero to infinity (AUC[0-∞] ) of baricitinib by twofold and decreased renal clearance to 69% of control in healthy subjects. Physiologically based pharmacokinetic (PBPK) modeling reproduced the renal clearance of baricitinib and the inhibitory effect of probenecid using the in vitro IC50 value of 4.4 μM. Using ibuprofen and diclofenac in vitro IC50 values of 4.4 and 3.8 μM toward OAT3, 1.2 and 1.0 AUC(0-∞) ratios of baricitinib were predicted. These predictions suggest clinically relevant drug-drug interactions (DDIs) with ibuprofen and diclofenac are unlikely.
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Affiliation(s)
| | | | | | - Xin Zhang
- Eli Lilly and Company, Indianapolis, Indiana, USA
| | | | - Y Anne Pak
- Eli Lilly and Company, Indianapolis, Indiana, USA
| | - J William Higgins
- Eli Lilly and Company, Indianapolis, Indiana, USA.,Current address: Organovo Inc., San Diego, California, USA
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Wu W, Bush KT, Nigam SK. Key Role for the Organic Anion Transporters, OAT1 and OAT3, in the in vivo Handling of Uremic Toxins and Solutes. Sci Rep 2017; 7:4939. [PMID: 28694431 PMCID: PMC5504054 DOI: 10.1038/s41598-017-04949-2] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 05/30/2017] [Indexed: 01/25/2023] Open
Abstract
In vitro data indicates that the kidney proximal tubule (PT) transporters of uremic toxins and solutes (e.g., indoxyl sulfate, p-cresol sulfate, kynurenine, creatinine, urate) include two “drug” transporters of the organic anion transporter (OAT) family: OAT1 (SLC22A6, originally NKT) and OAT3 (SLC22A8). Here, we have examined new and prior metabolomics data from the Oat1KO and Oat3KO, as well as newly obtained metabolomics data from a “chemical double” knockout (Oat3KO plus probenecid). This gives a picture of the in vivo roles of OAT1 and OAT3 in the regulation of the uremic solutes and supports the centrality of these “drug” transporters in independently and synergistically regulating uremic metabolism. We demonstrate a key in vivo role for OAT1 and/or OAT3 in the handling of over 35 uremic toxins and solutes, including those derived from the gut microbiome (e.g., CMPF, phenylsulfate, indole-3-acetic acid). Although it is not clear whether trimethylamine-N-oxide (TMAO) is directly transported, the Oat3KO had elevated plasma levels of TMAO, which is associated with cardiovascular morbidity in chronic kidney disease (CKD). As described in the Remote Sensing and Signaling (RSS) Hypothesis, many of these molecules are involved in interorgan and interorganismal communication, suggesting that uremia is, at least in part, a disorder of RSS.
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Affiliation(s)
- Wei Wu
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Kevin T Bush
- Department of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Sanjay K Nigam
- Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA. .,Department of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA. .,Departments of Medicine, Pediatrics, and Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA.
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9
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Mathialagan S, Piotrowski MA, Tess DA, Feng B, Litchfield J, Varma MV. Quantitative Prediction of Human Renal Clearance and Drug-Drug Interactions of Organic Anion Transporter Substrates Using In Vitro Transport Data: A Relative Activity Factor Approach. Drug Metab Dispos 2017; 45:409-417. [DOI: 10.1124/dmd.116.074294] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 02/06/2017] [Indexed: 11/22/2022] Open
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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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Feng B, Hurst S, Lu Y, Varma MV, Rotter CJ, El-Kattan A, Lockwood P, Corrigan B. Quantitative Prediction of Renal Transporter-Mediated Clinical Drug–Drug Interactions. Mol Pharm 2013; 10:4207-15. [DOI: 10.1021/mp400295c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Bo Feng
- Department of Pharmacokinetics and Drug Metabolism, Pfizer Global Research & Development, Groton, Connecticut 06340, United States
| | - Susan Hurst
- Department of Pharmacokinetics and Drug Metabolism, Pfizer Global Research & Development, Groton, Connecticut 06340, United States
| | - Yasong Lu
- CV/Met Pharmacometrics, Department of Exploratory Clinical & Translational Research, Bristol-Myers Squibb, Lawrenceville, New Jersey 08540, United States
| | - Manthena V. Varma
- Department of Pharmacokinetics and Drug Metabolism, Pfizer Global Research & Development, Groton, Connecticut 06340, United States
| | - Charles J. Rotter
- Department of Pharmacokinetics and Drug Metabolism, Pfizer Global Research & Development, Groton, Connecticut 06340, United States
| | - Ayman El-Kattan
- Department of Pharmacokinetics and Drug Metabolism, Pfizer Global Research & Development, Groton, Connecticut 06340, United States
| | - Peter Lockwood
- Department of Clinical Pharmacology, Pfizer Global Research & Development, Groton, Connecticut 06340, United States
| | - Brian Corrigan
- Department of Clinical Pharmacology, Pfizer Global Research & Development, Groton, Connecticut 06340, United States
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Cheng YF, Strid S, Borgå O, Nilsson D, Wemer J. Active Renal Secretion of NXY-059, a Novel Neuroprotectant, Is Mediated via an Organic Acid Transporter. J Clin Pharmacol 2013; 47:909-14. [PMID: 17585119 DOI: 10.1177/0091270007301803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Microdose Study of 14C-Acetaminophen With Accelerator Mass Spectrometry to Examine Pharmacokinetics of Parent Drug and Metabolites in Healthy Subjects. Clin Pharmacol Ther 2010; 88:824-30. [DOI: 10.1038/clpt.2010.206] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Landersdorfer CB, Kirkpatrick CMJ, Kinzig M, Bulitta JB, Holzgrabe U, Jaehde U, Reiter A, Naber KG, Rodamer M, Sörgel F. Competitive inhibition of renal tubular secretion of ciprofloxacin and metabolite by probenecid. Br J Clin Pharmacol 2010; 69:167-78. [PMID: 20233180 DOI: 10.1111/j.1365-2125.2009.03564.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS Probenecid influences transport processes of drugs at several sites in the body and decreases elimination of several quinolones. We sought to explore extent, time course, and mechanism of the interaction between ciprofloxacin and probenecid at renal and nonrenal sites. METHODS A randomized, two-way crossover study was conducted in 12 healthy volunteers (in part previously published Clin Pharmacol Ther 1995; 58: 532-41). Subjects received 200 mg ciprofloxacin as 30-min intravenous infusion without and with 3 g probenecid divided into five oral doses. Drug concentrations were analysed by liquid chromatography-tandem mass spectrometry and high-performance liquid chromatography. Ciprofloxacin and its 2-aminoethylamino-metabolite (M1) in plasma and urine with and without probenecid were modelled simultaneously with WinNonlin. RESULTS Data are ratio of geometric means (90% confidence intervals). Addition of probenecid reduced the median renal clearance from 23.8 to 8.25 l h(-1)[65% reduction (59, 71), P < 0.01] for ciprofloxacin and from 20.5 to 8.26 l h(-1) (66% reduction (57, 73), P < 0.01] for M1 (estimated by modelling). Probenecid reduced ciprofloxacin nonrenal clearance by 8% (1, 14) (P < 0.08). Pharmacokinetic modelling indicated competitive inhibition of the renal tubular secretion of ciprofloxacin and M1 by probenecid. The affinity for the renal transporter was 4.4 times higher for ciprofloxacin and 3.6 times higher for M1 than for probenecid, based on the molar ratio. Probenecid did not affect volume of distribution of ciprofloxacin or M1, nonrenal clearance or intercompartmental clearance of ciprofloxacin. CONCLUSIONS Probenecid inhibited the renal tubular secretion of ciprofloxacin and M1, probably by a competitive mechanism and due to reaching >100-fold higher plasma concentrations. Formation of M1, nonrenal clearance and distribution of ciprofloxacin were not affected.
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Competitive inhibition of renal tubular secretion of gemifloxacin by probenecid. Antimicrob Agents Chemother 2009; 53:3902-7. [PMID: 19564368 DOI: 10.1128/aac.01200-08] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Probenecid interacts with transport processes of drugs at several sites in the body. For most quinolones, renal clearance is reduced by concomitant administration of probenecid. The interaction between gemifloxacin and probenecid has not yet been studied. We studied the extent, time course, site(s), and mechanism of this interaction. Seventeen healthy volunteers participated in a randomized, two-way crossover study. Subjects received 320 mg gemifloxacin as an oral tablet without and with 4.5 g probenecid divided in eight oral doses. Drug concentrations in plasma and urine were analyzed by liquid chromatography-tandem mass spectrometry. WinNonlin was used for noncompartmental analysis, compartmental modeling, and statistics, and NONMEM was used for visual predictive checks. Concomitant administration of probenecid increased plasma gemifloxacin concentrations and amounts excreted in urine compared to baseline amounts. Data are average estimates (percent coefficients of variation). Modeling showed a competitive inhibition of the renal tubular secretion of gemifloxacin by probenecid as the most likely mechanism of the interaction. The estimated K(m) and Vmax for the saturable part of renal elimination were 9.16 mg/liter (20%) and 113 mg/h (21%), respectively. Based on the molar ratio, the affinity for the renal transporter was 10-fold higher for gemifloxacin than for probenecid. Since probenecid reached an approximately 200-times-higher area under the molar concentration-time curve from 0 to 24 h than gemifloxacin, probenecid inhibited the active tubular secretion of gemifloxacin. Probenecid also reduced the nonrenal clearance of gemifloxacin from 25.2 (26%) to 21.0 (23%) liters/h. Probenecid inhibited the renal tubular secretion of gemifloxacin, most likely by a competitive mechanism, and slightly decreased nonrenal clearance of gemifloxacin.
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16
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Pharmacokinetics and tolerability of oseltamivir combined with probenecid. Antimicrob Agents Chemother 2008; 52:3013-21. [PMID: 18559644 DOI: 10.1128/aac.00047-08] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Oseltamivir is an inhibitor of influenza virus neuraminidase, which is approved for use for the treatment and prophylaxis of influenza A and B virus infections. In the event of an influenza pandemic, oseltamivir supplies may be limited; thus, alternative dosing strategies for oseltamivir prophylaxis should be explored. Healthy volunteers were randomized to a three-arm, open-label study and given 75 mg oral oseltamivir every 24 h (group 1), 75 mg oseltamivir every 48 h (q48h) combined with 500 mg probenecid four times a day (group 2), or 75 mg oseltamivir q48h combined with 500 mg probenecid twice a day (group 3) for 15 days. Pharmacokinetic data, obtained by noncompartmental methods, and safety data are reported. Forty-eight subjects completed the pharmacokinetic analysis. The study drugs were generally well tolerated, except for one case of reversible grade 4 thrombocytopenia in a subject in group 2. The calculated 90% confidence intervals (CIs) for the geometric mean ratios between groups 2 and 3 and group 1 were outside the bioequivalence criteria boundary (0.80 to 1.25) at 0.63 to 0.89 for group 2 versus group 1 and 0.57 to 0.90 for group 3 versus group 1. The steady-state apparent oral clearance of oseltamivir carboxylate was significantly less in groups 2 (7.4 liters/h; 90% CI, 6.08 to 8.71) and 3 (7.19 liters/h; 90% CI, 6.41 to 7.98) than in group 1 (9.75 liters/h; 90% CI, 6.91 to 12.60) (P < 0.05 for both comparisons by analysis of variance). The (arithmetic) mean concentration at 48 h for group 2 was not significantly different from the mean concentration at 24 h for group 1 (42 +/- 76 and 81 +/- 54 ng/ml, respectively; P = 0.194), but the mean concentration at 48 h for group 3 was significantly less than the mean concentration at 24 h for group 1 (23 +/- 26 and 81 +/- 54 ng/ml, respectively; P = 0.012). Alternate-day dosing of oseltamivir plus dosing with probenecid four times daily achieved trough oseltamivir carboxylate concentrations adequate for neuraminidase inhibition in vitro, and this combination should be studied further.
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Li M, Anderson GD, Wang J. Drug-drug interactions involving membrane transporters in the human kidney. Expert Opin Drug Metab Toxicol 2006; 2:505-32. [PMID: 16859401 DOI: 10.1517/17425255.2.4.505] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The kidneys play a critical role in the elimination of xenobiotics. Factors affecting the ability of the kidney to eliminate drugs may result in marked changes in the pharmacokinetics of a given compound. Drug-drug interactions due to competitive inhibition of renal organic anion or cation secretion systems have been noticed clinically for a long time. However, our understanding of the physical sites of interactions, that is, the specific transport proteins that the interacting drugs act on, has just begun very recently. This review summarises the latest progress in molecular identification and functional characterisation of major drug transporters in the human kidney. In particular, the review focuses on relating cloned renal drug transporters to clinically observed drug-drug interactions. The authors' opinion on the current status and future directions of research in these areas is also offered.
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Affiliation(s)
- Meng Li
- University of Washington, Department of Pharmaceutics, School of Pharmacy, Seattle, 98195, USA
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18
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Endres CJ, Hsiao P, Chung FS, Unadkat JD. The role of transporters in drug interactions. Eur J Pharm Sci 2006; 27:501-17. [PMID: 16364611 DOI: 10.1016/j.ejps.2005.11.002] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2005] [Revised: 10/28/2005] [Accepted: 11/01/2005] [Indexed: 01/11/2023]
Abstract
Transport proteins play an important role in the adsorption, distribution and elimination of a wide variety of drugs. Therefore, it is not surprising that transporter-based drug interactions can occur in the clinic. These interactions can lead to changes in toxicity and/or efficacy of the affected drug. Here, we review such interactions and ask if these interactions could have been predicted from in vitro data. Conducting such in vitro-in vivo correlation is important for predicting future transporter-based drug interactions.
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Affiliation(s)
- Christopher J Endres
- Department of Pharmaceutics, Box 357610, University of Washington, Seattle, WA 98195, USA
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Kakizaki T, Yokoyama Y, Natsuhori M, Karasawa A, Kubo S, Yamada N, Ito N. Probenecid: Its Chromatographic Determination, Plasma Protein Binding, and in vivo Pharmacokinetics in Dogs. J Vet Med Sci 2006; 68:361-5. [PMID: 16679727 DOI: 10.1292/jvms.68.361] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Pharmacokinetics (PK) of probenecid including plasma probenecid concentrations, in vitro plasma protein binding properties, and in vivo PK parameters were determined in dogs. Probenecid concentrations were best determined by HPLC, which showed good linearity and good recovery with simple plasma preparation. The quantification limit of probenecid was approximately 50 ng/ml at S/N ratio = 3, by simple procedure with HCl and methanol treatment. Probenecid showed two types of binding characteristics, i.e., high-affinity with low-capacity and low-affinity with high-capacity binding. This result indicated 80-88% of probenecid was bound to plasma protein(s) at observed concentrations (< 80 microg/ml) in vivo at an intravenous dose of 20 mg/kg. Plasma probenecid concentration-time profile following i.v. administration in dogs showed biphasic decline and well fitted a two-compartment open model. The total body clearance was 0.34 +/- 0.04 ml/min/kg, volume of distribution at steady-state was 0.46 +/- 0.07 l/kg, elimination half-life was 18 +/- 6 hr, and mean residence time (MRT) was 23 +/- 6 hr. Since probenecid has been known as a potent inhibitor of renal tubular excretion of acidic drugs and highly binds to plasma proteins, our observation in relation to plasma protein binding and PK parameters will serve as the basic information concerning drug-drug interactions in dogs and in other mammalian species.
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Affiliation(s)
- Takehiko Kakizaki
- Laboratory of Veterinary Radiology and Radiation Biology Kitasato University, School of Veterinary Medicine and Animal Sciences, Japan
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Chen C, Scott D, Hanson E, Franco J, Berryman E, Volberg M, Liu X. Impact of Mrp2 on the biliary excretion and intestinal absorption of furosemide, probenecid, and methotrexate using Eisai hyperbilirubinemic rats. Pharm Res 2003; 20:31-7. [PMID: 12608533 DOI: 10.1023/a:1022238506509] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE This study assesses the impact of rat multidrug resistance-associated protein 2 (Mrp2) on the biliary excretion and oral absorption of furosemide, probenecid, and methotrexate using Eisai hyperbilirubinemic rats (EHBR). METHODS To assess Mrp2-mediated biliary excretion, rats received a 2-h intravenous infusion of furosemide, probenecid, or methotrexate. Blood and bile samples were collected at specified intervals. To assess Mrp2's impact on oral absorption, rats received furosemide, probenecid, or methotrexate orally at 5 mg/kg. Jugular and portal blood samples were obtained at timed intervals. All samples were analyzed by LC-MS/MS. Pharmacokinetic parameters were estimated using WinNonlin and standard pharmacokinetic equations. RESULTS Thirty seven- and 39-fold reductions in biliary clearance were observed in EHBR as compared to control rats for probenecid and methotrexate, respectively. Biliary clearance was comparable between EHBR and control rats for furosemide. In all cases, no significant difference in absorption was observed between EHBR and control rats. CONCLUSIONS This study provides the first evidence that Mrp2 mediates the biliary excretion of probenecid but not furosemide. Additionally, Mrp2 apparently has a less profound impact on intestinal absorption than biliary excretion of its substrates. Furthermore, alteration in systemic clearance in EHBR indicates that a potential compensatory mechanism may occur in EHBR.
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Affiliation(s)
- Cuiping Chen
- Groton Laboratory, Pfizer Global Research and Development, Pfizer Inc, Eastern Point Road, Groton, Connecticut 06340, USA.
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21
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Horikawa M, Kato Y, Sugiyama Y. Reduced gastrointestinal toxicity following inhibition of the biliary excretion of irinotecan and its metabolites by probenecid in rats. Pharm Res 2002; 19:1345-53. [PMID: 12403072 DOI: 10.1023/a:1020358910490] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE To ameliorate the late-onset of severe gastrointestinal toxicity provoked by irinotecan (CPT-11), which may be related to the biliary excretion of CPT-11 and/or its metabolites. METHODS Effects of probenecid, an inhibitor of MRP2/ABCC2, on the biliary excretion and mucosal intestinal tissue concentration of CPT-11 and its metabolites were examined in rats. CPT-11-induced late-onset gastrointestinal toxicity was also evaluated. RESULTS Coadministration of probenecid reduced the biliary excretion of CPT-11, an active metabolite (SN-38) and its glucuronide by half with a concomitant increase in their plasma concentration. When the dose of CPT-11, in the presence of probenecid, was set at half that in its absence, the plasma SN-38 concentration was maintained at the same level as the control, whereas the mucosal intestinal tissue concentration of SN-38 was reduced. Under this condition, CPT-11-induced watery diarrhea, changes in intestinal marker enzymes and body weight reduction were much less in the probenecid-treated group, although the degree of bone marrow suppression was almost the same as that in the control. CONCLUSIONS Coadministration of probenecid with a reduced dose of CPT-11 potently reduces both SN-38 exposure and CPT-11-induced late-onset toxicity in gastrointestinal tissues, possibly by inhibiting the biliary excretion of CPT-11 and/or its metabolites.
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Affiliation(s)
- Masato Horikawa
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Japan
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22
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Horikawa M, Kato Y, Tyson CA, Sugiyama Y. The Potential for an Interaction between MRP2 (ABCC2) and Various Therapeutic Agents: Probenecid as a Candidate Inhibitor of the Biliary Excretion of Irinotecan Metabolites. Drug Metab Pharmacokinet 2002; 17:23-33. [PMID: 15618649 DOI: 10.2133/dmpk.17.23] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Irinotecan hydrochloride (CPT-11) is an anticancer agent with unpredictable bouts of diarrhea as a dose-limiting toxic side-effect. Since the biliary excretion of its active metabolite (SN-38) and SN-38 glucuronide (SN38-Glu), which are mediated by the multidrug resistance associated protein-2 (MRP2/ABCC2), has been proposed to be related to this gastrointestinal toxicity, we have attempted here to examine the potential of various therapeutic agents to interact with the biliary excretion in order to identify MRP2 inhibitors to prevent this toxicity. The inhibition constants (K(i)) of 26 compounds were examined for the transport of a typical MRP2 substrate in isolated canalicular membrane vesicles. Of these, 13 compounds inhibited the transport with K(i) values from 0.0461 to 281 microM. Three inhibitors (probenecid, sulfobromophthalein and glycyrrhizin) were also found to inhibit the biliary excretion of SN-38 and SN38-Glu in rats in vivo, and the degrees of inhibition were compatible with the estimated values based on the ratios of K(i) and unbound concentrations in circulating plasma. A similar estimation of the potential inhibitory effect in human was also examined by considering both the K(i) of each therapeutic agent and its unbound concentration both in circulating plasma and the inlet to the liver. The predicted degrees of inhibition by most compounds were minimal whereas approximately 75% inhibition was predicted for probenecid. Thus, probenecid may be a candidate which can be used clinically to inhibit the biliary excretion of CPT-11 metabolites, whereas an interaction between most of the other compounds and MRP2 is more unlikely.
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Affiliation(s)
- Masato Horikawa
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Japan
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23
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Oravcová J, Böhs B, Lindner W. Drug-protein binding sites. New trends in analytical and experimental methodology. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL APPLICATIONS 1996; 677:1-28. [PMID: 8925081 DOI: 10.1016/0378-4347(95)00425-4] [Citation(s) in RCA: 238] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In the last few years, continuous progress in instrumental analytical methodology has been achieved with a substantial increase in the number of new, more specific and more flexible methods for ligand-protein assays. In general, the methods used for drug-protein binding studies can be divided into two main groups: separation methods (enabling the calculation of binding parameters, i.e. the number of binding sites and their respective affinity constants) and non-separation methods (describing predominantly qualitative parameters of the ligand-protein complex). This review will be focussed particularly on recent trends in the development of drug-protein binding methods including stereoselective and non-stereoselective aspects using chromatography, capillary electrophoresis and microdialysis as compared to the "conventional approach" using equilibrium dialysis, ultrafiltration or size exclusion chromatography. The advantages and limitations of various methods will be discussed including a focus on "optimal" experimental strategies taking into account in vitro, ex vivo and/or in vivo studies. Furthermore, the importance of some particular aspects concerning the drug binding to proteins (covalent binding of drugs and metabolites, stereoselective interactions and evaluation of binding data) will be outlined in more detail.
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Affiliation(s)
- J Oravcová
- Institute of Pharmaceutical Chemistry, Karl-Franzens-University of Graz, Austria
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24
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Darling IM, Morris ME. Sulfate homeostasis. IV. Probenecid-induced alterations of inorganic sulfate in rats. Pharm Res 1991; 8:376-9. [PMID: 2052528 DOI: 10.1023/a:1015805918168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Homeostasis of inorganic sulfate is maintained by the capacity-limited renal reabsorption of sulfate in the proximal tubule. The purpose of the present investigation was to determine if probenecid, the classical inhibitor of renal organic anion secretion, may affect sulfate renal clearance. Two groups of rats were administered in a randomized crossover design, an i.v. bolus dose (20.6 or 92.4 mg/kg) and 4-hr infusion (0.28 or 0.59 mg/min/kg) of probenecid or vehicle, and blood and urine samples were collected. At a steady-state serum concentration of 0.45 mM, probenecid had no significant effect on the serum concentrations or renal clearance of inorganic sulfate, whereas at a serum concentration of 1.4 mM, probenecid treatment caused a significant decrease in serum sulfate concentrations (0.57 +/- 0.11 vs 0.96 +/- 0.19 mM in controls, mean +/- SD, n = 6, P less than 0.001) due to an increase in the renal clearance of sulfate (3.88 +/- 1.18 vs 2.13 +/- 0.84 ml/min/kg in controls, P less than 0.01). The fraction of the filtered sulfate that was reabsorbed was significantly decreased (0.38 +/- 0.23, vs 0.74 +/- 0.09 in controls, P less than 0.01). Therefore, probenecid treatment results in the inhibition of the renal reabsorption of inorganic sulfate in rats in vivo.
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Affiliation(s)
- I M Darling
- Department of Pharmaceutics, School of Pharmacy, State University of New York, Buffalo, Amherst 14260
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25
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Patel IH, Soni PP, Carbone JJ, Audet PR, Morrison G, Gibson GA. Lack of probenecid effect on nonrenal excretion of ceftriaxone in anephric patients. J Clin Pharmacol 1990; 30:449-53. [PMID: 2347956 DOI: 10.1002/j.1552-4604.1990.tb03484.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Probenecid has been shown to decrease renal and biliary excretion of organic acids. In a randomized crossover study, the effect of coadministered probenecid on nonrenal excretion of ceftriaxone was studied in six functionally anephric patients in whom ceftriaxone is eliminated exclusively by nonrenal or presumably by biliary excretion. Each patient received 0.5 g IV ceftriaxone without and with probenecid (0.5 g at 10 and 2 hours prior to ceftriaxone and 0.5 g q12h X 3 doses post ceftriaxone). Serial blood samples were collected over 48 hours and plasma analyzed for ceftriaxone by high performance liquid chromatography (HPLC). Pharmacokinetic analysis was based on a model-independent approach. Probenecid did not significantly affect the disposition of ceftriaxone in this study, thus suggesting that nonrenal excretion of ceftriaxone is not inhibited by probenecid.
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Affiliation(s)
- I H Patel
- Department of Drug Metabolism, Hoffmann-La Roche Inc., Nutley, New Jersey 07110
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Inotsume N, Nishimura M, Nakano M, Fujiyama S, Sato T. The inhibitory effect of probenecid on renal excretion of famotidine in young, healthy volunteers. J Clin Pharmacol 1990; 30:50-6. [PMID: 2303581 DOI: 10.1002/j.1552-4604.1990.tb03438.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Effects of coadministration of probenecid on pharmacokinetic behaviors of famotidine, an H2-receptor antagonist, after oral administration, were studied in eight young, healthy volunteers. They received an oral 20 mg dose of famotidine with and without coadministration of oral 1500 mg doses of probenecid. The mean area under the serum famotidine concentration-time curve up to 10 hours was increased by coadministration of probenecid from 424 +/- 19 (SEM) to 768 +/- 39 ng.hr/ml. The mean urinary excretion rate of unchanged famotidine, the mean amount of unchanged famotidine excreted in urine up to 24 hours and mean renal clearance were decreased by coadministration of probenecid. The mean tubular secretion clearance of famotidine was decreased from 196.2 +/- 21.4 to 22.0 +/- 4.2 ml/min. These data suggest that probenecid, which is a classical inhibitor of renal tubular secretion of organic anions, inhibits the renal tubular secretion of famotidine, which exists partly in a cationic form under physiological pH conditions.
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Affiliation(s)
- N Inotsume
- Department of Pharmaceutical Services, Kumamoto University Hospital, Japan
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