1
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Kadar EP, Holliman CL, Vourvahis M, Rodrigues AD. Inception and development of a LC-MS/MS assay for the multiplexed quantitation of nine human drug transporter biomarkers. Bioanalysis 2024; 16:347-362. [PMID: 38376139 DOI: 10.4155/bio-2023-0197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024] Open
Abstract
Background: It has become common practice to assess solute carrier transporter (SLC)-mediated drug-drug interactions (DDIs) by quantitating various individual endogenous compounds as biomarkers in human plasma and urine. The goal of this work was to develop biomarker multiplex assays that could be utilized during first in human studies to support the simultaneous assessment of clinical DDI risk across various SLCs. Methodology: Hydrophilic interaction chromatography-MS/MS methods were developed, and validations were performed. Results: The multiplex assays were applied to a first in human study. Placebo/reference subject biomarker data were consistent with single assay in-house and published data. Conclusion: This work demonstrates the utility of these multiplex methods to support the concurrent evaluation of clinical DDI risk across various SLCs.
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Affiliation(s)
- Eugene P Kadar
- Bioanalytical Group, Medicine Design, Pfizer Worldwide Research & Development, Pfizer, Inc., 445 Eastern Point Road, Groton, CT 06340, USA
| | - Christopher L Holliman
- Bioanalytical Group, Medicine Design, Pfizer Worldwide Research & Development, Pfizer, Inc., 445 Eastern Point Road, Groton, CT 06340, USA
| | - Manoli Vourvahis
- Clinical Pharmacology, Pfizer Worldwide Research & Development, Pfizer, Inc., 66 Hudson Blvd. E, New York, NY 10001, USA
| | - A David Rodrigues
- Transporter Sciences Group, Medicine Design, Pfizer Worldwide Research & Development, Pfizer, Inc., 445 Eastern Point Road, Groton, CT 06340, USA
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2
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Kinzi J, Hussner J, Schäfer AM, Treyer A, Seibert I, Tillmann A, Mueller V, Gherardi C, Vonwyl C, Hamburger M, Meyer Zu Schwabedissen HE. Influence of Slco2b1-knockout and SLCO2B1-humanization on coproporphyrin I and III levels in rats. Br J Pharmacol 2024; 181:36-53. [PMID: 37533302 DOI: 10.1111/bph.16205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 03/15/2023] [Accepted: 07/20/2023] [Indexed: 08/04/2023] Open
Abstract
BACKGROUND AND PURPOSE Coproporphyrin (CP) I and III are byproducts of haem synthesis currently investigated as biomarkers for drug-drug interactions involving hepatic organic anion transporting polypeptide (OATP) 1B transporters. Another hepatically expressed OATP-member is OATP2B1. The aim of this study was to test the impact of OATP2B1, which specifically transports CPIII, on CP serum levels, applying novel rat models. EXPERIMENTAL APPROACH CPIII transport kinetics and the interplay between OATP2B1 and multidrug resistance-associated proteins (MRPs) were determined in vitro using the vTF7 expression system. Novel rSlco2b1-/- and SLCO2B1+/+ rat models were characterized for physiological parameters and for CP serum levels. Hepatic and renal expression of transporters involved in CP disposition were determined by real-time qPCR, Western blot analysis, and immunohistochemistry. KEY RESULTS In vitro experiments revealed differences in transport kinetics comparing human and rat OATP2B1 and showed a consistent, species-specific interplay with hMRP3/rMRP3. Deletion of rOATP2B1 was associated with a trend towards lower CPI serum levels compared with wildtype rats, while CPIII remained unchanged. Comparing SLCO2B1+/+ with knockout rats revealed an effect of sex: only in females the genetic modification influenced CP serum levels. Analysis of hepatic and renal transporters revealed marginal, but in part, statistically significant differences in rMRP2 abundance, which may contribute to the observed changes in CP serum levels. CONCLUSION AND IMPLICATIONS Our findings support that factors other than OATP1B transporters are of relevance for basal CP levels. Only in female rats, humanization of SLCO2B1 affects basal CPI and CPIII serum levels, despite isomer selectivity of OATP2B1.
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Affiliation(s)
- Jonny Kinzi
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Janine Hussner
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Anima M Schäfer
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Andrea Treyer
- Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Isabell Seibert
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Annika Tillmann
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Vanessa Mueller
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Clarisse Gherardi
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Celina Vonwyl
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Matthias Hamburger
- Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
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3
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Kikuchi R, Chothe PP, Chu X, Huth F, Ishida K, Ishiguro N, Jiang R, Shen H, Stahl SH, Varma MVS, Willemin ME, Morse BL. Utilization of OATP1B Biomarker Coproporphyrin-I to Guide Drug-Drug Interaction Risk Assessment: Evaluation by the Pharmaceutical Industry. Clin Pharmacol Ther 2023; 114:1170-1183. [PMID: 37750401 DOI: 10.1002/cpt.3062] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/08/2023] [Indexed: 09/27/2023]
Abstract
Drug-drug interactions (DDIs) involving hepatic organic anion transporting polypeptides 1B1/1B3 (OATP1B) can be substantial, however, challenges remain for predicting interaction risk. Emerging evidence suggests that endogenous biomarkers, particularly coproporphyrin-I (CP-I), can be used to assess in vivo OATP1B activity. The present work under the International Consortium for Innovation and Quality in Pharmaceutical Development was aimed primarily at assessing CP-I as a biomarker for informing OATP1B DDI risk. Literature and unpublished CP-I data along with pertinent in vitro and clinical DDI information were collected to identify DDIs primarily involving OATP1B inhibition and assess the relationship between OATP1B substrate drug and CP-I exposure changes. Static models to predict changes in exposure of CP-I, as a selective OATP1B substrate, were also evaluated. Significant correlations were observed between CP-I area under the curve ratio (AUCR) or maximum concentration ratio (Cmax R) and AUCR of substrate drugs. In general, the CP-I Cmax R was equal to or greater than the CP-I AUCR. CP-I Cmax R < 1.25 was associated with absence of OATP1B-mediated DDIs (AUCR < 1.25) with no false negative predictions. CP-I Cmax R < 2 was associated with weak OATP1B-mediated DDIs (AUCR < 2). A correlation was identified between CP-I exposure changes and OATP1B1 static DDI predictions. Recommendations for collecting and interpreting CP-I data are discussed, including a decision tree for guiding DDI risk assessment. In conclusion, measurement of CP-I is recommended to inform OATP1B inhibition potential. The current analysis identified changes in CP-I exposure that may be used to prioritize, delay, or replace clinical DDI studies.
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Affiliation(s)
- Ryota Kikuchi
- Quantitative, Translational and ADME Sciences, AbbVie Inc., North Chicago, Illinois, USA
| | - Paresh P Chothe
- Global Drug Metabolism and Pharmacokinetics, Takeda Development Center Americas, Inc. (TDCA), Lexington, Massachusetts, USA
| | - Xiaoyan Chu
- ADME and Discovery Toxicology, Merck & Co., Inc., Rahway, New Jersey, USA
| | - Felix Huth
- PK Sciences, Novartis Pharma AG, Basel, Switzerland
| | - Kazuya Ishida
- Drug Metabolism, Gilead Sciences Inc., Foster City, California, USA
| | - Naoki Ishiguro
- Pharmacokinetics and Non-Clinical Safety Department, Nippon Boehringer Ingelheim Co., Ltd., Kobe, Japan
| | - Rongrong Jiang
- Drug Metabolism and Pharmacokinetics, Eisai Inc., Cambridge, Massachusetts, USA
| | - Hong Shen
- Departments of Drug Metabolism and Pharmacokinetics, Bristol Myers Squibb Research and Development, Princeton, New Jersey, USA
| | - Simone H Stahl
- CVRM Safety, Clinical Pharmacology and Safety Sciences, R&D, AstraZeneca, Cambridge, UK
| | - Manthena V S Varma
- Pharmacokinetics, Dynamics and Metabolism, Medicine Design, Pfizer Inc., Groton, Connecticut, USA
| | - Marie-Emilie Willemin
- Drug Metabolism and Pharmacokinetics, Janssen Research and Development, a Division of Janssen Pharmaceutica NV, Beerse, Belgium
| | - Bridget L Morse
- Department of Drug Disposition, Eli Lilly, Indianapolis, Indiana, USA
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4
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Nakayama S, Toshimoto K, Yamazaki S, Snoeys J, Sugiyama Y. Physiologically-based pharmacokinetic modeling for investigating the effect of simeprevir on concomitant drugs and an endogenous biomarker of OATP1B. CPT Pharmacometrics Syst Pharmacol 2023; 12:1461-1472. [PMID: 37667529 PMCID: PMC10583237 DOI: 10.1002/psp4.13023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/11/2023] [Accepted: 07/18/2023] [Indexed: 09/06/2023] Open
Abstract
The orally available anti-hepatitis C virus (HCV) drug simeprevir exhibits nonlinear pharmacokinetics at the clinical doses due to saturation of cytochrome P450 (CYP) 3A4 metabolism and organic anion transporting peptide (OATP) 1B mediated hepatic uptake. Additionally, simeprevir increases exposures of concomitant drugs by CYP3A4 and OATP1B inhibition. The objective of this study was to develop physiologically-based pharmacokinetic (PBPK) models that could describe drug-drug interactions (DDIs) of simeprevir with concomitant drugs via CYP3A4 and OATP1B inhibition, and also to capture the effects on coproporphyrin-I (CP-I), an endogenous biomarker of OATP1B. PBPK modeling estimated unbound simeprevir inhibitory constant (Ki ) of 2.89 μM against CYP3A4 in the DDI results between simeprevir and midazolam in healthy volunteers. Then, we analyzed the DDIs between simeprevir and atorvastatin, a dual substrate of CYP3A4 and OATP1B, in healthy volunteers, and unbound Ki against OATP1B was estimated to be 0.00347 μM. Finally, we analyzed the increase in the blood level of CP-I by simeprevir to verify the Ki,OATP1B . Because CP-I was measured in subjects with HCV with various hepatic fibrosis state, Monte Carlo simulation was performed to involve the decreases in expression levels of hepatic CYP3A4 and OATP1B and their interindividual variabilities. The PBPK modeling coupled with Monte Carlo simulation using the Ki,OATP1B value obtained from atorvastatin study reasonably recovered the observed relationship between CP-I and simeprevir blood levels. In conclusion, the simeprevir PBPK model developed in this study can quantitatively describe the increase in exposures of concomitant drugs and an endogenous biomarker via inhibition of CYP3A4 and OATP1B.
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Affiliation(s)
- Shinji Nakayama
- DMPK Research Laboratories, Shoyaku, Innovative Research DivisionMitsubishi Tanabe Pharma CorporationYokohamaKanagawaJapan
| | - Kota Toshimoto
- Systems Pharmacology, Non‐Clinical Biomedical Science, Applied Research and OperationsAstellas Pharma Inc.IbarakiJapan
- Sugiyama Laboratory, RIKEN Cluster for ScienceRIKENYokohamaKanagawaJapan
| | - Shinji Yamazaki
- Drug Metabolism and PharmacokineticsJanssen Research and Development, LLCSan DiegoCaliforniaUSA
| | - Jan Snoeys
- Drug Metabolism and PharmacokineticsJanssen Research and DevelopmentBeerseBelgium
| | - Yuichi Sugiyama
- Sugiyama Laboratory, RIKEN Cluster for ScienceRIKENYokohamaKanagawaJapan
- Laboratory of Quantitative System Pharmacokinetics/PharmacodynamicsJosai International University (JIU)TokyoJapan
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5
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Chan GH, Houle R, Zhang J, Katwaru R, Li Y, Chu X. Evaluation of the Selectivity of Several Organic Anion Transporting Polypeptide 1B Biomarkers Using Relative Activity Factor Method. Drug Metab Dispos 2023; 51:1089-1104. [PMID: 37137718 DOI: 10.1124/dmd.122.000972] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 04/13/2023] [Accepted: 05/01/2023] [Indexed: 05/05/2023] Open
Abstract
In recent years, some endogenous substrates of organic anion transporting polypeptide 1B (OATP1B) have been identified and characterized as potential biomarkers to assess OATP1B-mediated clinical drug-drug interactions (DDIs). However, quantitative determination of their selectivity to OATP1B is still limited. In this study, we developed a relative activity factor (RAF) method to determine the relative contribution of hepatic uptake transporters OATP1B1, OATP1B3, OATP2B1, and sodium-taurocholate co-transporting polypeptide (NTCP) on hepatic uptake of several OATP1B biomarkers, including coproporphyrin I (CPI), coproporphyrin I CPIII, and sulfate conjugates of bile acids: glycochenodeoxycholic acid sulfate (GCDCA-S), glycodeoxycholic acid sulfate (GDCA-S), and taurochenodeoxycholic acid sulfate (TCDCA-S). RAF values for OATP1B1, OATP1B3, OATP2B1, and NTCP were determined in cryopreserved human hepatocytes and transporter transfected cells using pitavastatin, cholecystokinin, resveratrol-3-O-β-D-glucuronide, and taurocholic acid (TCA) as reference compounds, respectively. OATP1B1-specific pitavastatin uptake in hepatocytes was measured in the absence and presence of 1 µM estropipate, whereas NTCP-specific TCA uptake was measured in the presence of 10 µM rifampin. Our studies suggested that CPI was a more selective biomarker for OATP1B1 than CPIII, whereas GCDCA-S and TCDCA-S were more selective to OATP1B3. OATP1B1 and OATP1B3 equally contributed to hepatic uptake of GDCA-S. The mechanistic static model, incorporating the fraction transported of CPI/III estimated by RAF and in vivo elimination data, predicted several perpetrator interactions with CPI/III. Overall, RAF method combined with pharmacogenomic and DDI studies is a useful tool to determine the selectivity of transporter biomarkers and facilitate the selection of appropriate biomarkers for DDI evaluation. SIGNIFICANCE STATEMENT: The authors developed a new relative activity factor (RAF) method to quantify the contribution of hepatic uptake transporters organic anion transporting polypeptide (OATP)1B1, OATP1B3, OATP2B1, and sodium taurocholate co-transporting polypeptide (NTCP) on several OATP1B biomarkers and evaluated their predictive value on drug-drug interactions (DDI). These studies suggest that the RAF method is a useful tool to determine the selectivity of transporter biomarkers. This method combined with pharmacogenomic and DDI studies will mechanistically facilitate the selection of appropriate biomarkers for DDI prediction.
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Affiliation(s)
- Grace Hoyee Chan
- ADME and Discovery Toxicity, Merck & Co., Inc., Rahway, New Jersey
| | - Robert Houle
- ADME and Discovery Toxicity, Merck & Co., Inc., Rahway, New Jersey
| | - Jinghui Zhang
- ADME and Discovery Toxicity, Merck & Co., Inc., Rahway, New Jersey
| | - Ravi Katwaru
- ADME and Discovery Toxicity, Merck & Co., Inc., Rahway, New Jersey
| | - Yang Li
- ADME and Discovery Toxicity, Merck & Co., Inc., Rahway, New Jersey
| | - Xiaoyan Chu
- ADME and Discovery Toxicity, Merck & Co., Inc., Rahway, New Jersey
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6
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Yoshikado T, Aoki Y, Mochizuki T, Rodrigues AD, Chiba K, Kusuhara H, Sugiyama Y. Cluster Gauss-Newton method analyses of PBPK model parameter combinations of coproporphyrin-I based on OATP1B-mediated rifampicin interaction studies. CPT Pharmacometrics Syst Pharmacol 2022; 11:1341-1357. [PMID: 35945914 PMCID: PMC9574750 DOI: 10.1002/psp4.12849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/06/2022] [Accepted: 07/11/2022] [Indexed: 12/02/2022] Open
Abstract
Coproporphyrin I (CP-I) is an endogenous biomarker supporting the prediction of drug-drug interactions (DDIs) involving hepatic organic anion transporting polypeptide 1B (OATP1B). We previously constructed a physiologically-based pharmacokinetic (PBPK) model for CP-I using clinical DDI data with an OATP1B inhibitor, rifampicin (RIF). In this study, PBPK model parameters for CP-I were estimated using the cluster Gauss-Newton method (CGNM), an algorithm used to find multiple approximate solutions for nonlinear least-squares problems. Eight unknown parameters including the hepatic overall intrinsic clearance (CLint,all ), the rate of biosynthesis (vsyn ), and the OATP1B inhibition constant of RIF(Ki,u,OATP ) were estimated by fitting to the observed CP-I blood concentrations in two different clinical studies involving changing the RIF dose. Multiple parameter combinations were obtained by CGNM that could well capture the clinical data. Among those, CLint,all , Ki,u,OATP , and vsyn were sensitive parameters. The obtained Ki,u,OATP for CP-I was 5.0- and 2.8-fold lower than that obtained for statins, confirming our previous findings describing substrate-dependent Ki,u,OATP values. In conclusion, CGNM analyses of PBPK model parameter combinations enables estimation of the three essential parameters for CP-I to capture the DDI profiles, even if the other parameters remain unidentified. The CGNM also clarified the importance of appropriate combinations of other unidentified parameters to enable capture of the CP-I concentration time course under the influence of RIF. The described CGNM approach may also support the construction of robust PBPK models for additional transporter biomarkers beyond CP-I.
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Affiliation(s)
- Takashi Yoshikado
- Laboratory of Clinical PharmacologyYokohama University of PharmacyYokohamaKanagawaJapan
| | - Yasunori Aoki
- Laboratory of Quantitative System Pharmacokinetics/Pharmacodynamics, School of PharmacyJosai International UniversityTokyoJapan,Present address:
AstraZenecaMölndalSweden
| | - Tatsuki Mochizuki
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciencesthe University of TokyoTokyoJapan
| | - A. David Rodrigues
- Transporter Sciences Group, ADME Sciences, Medicine Design, PfizerGrotonConnecticutUSA
| | - Koji Chiba
- Laboratory of Clinical PharmacologyYokohama University of PharmacyYokohamaKanagawaJapan
| | - Hiroyuki Kusuhara
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciencesthe University of TokyoTokyoJapan
| | - Yuichi Sugiyama
- Laboratory of Quantitative System Pharmacokinetics/Pharmacodynamics, School of PharmacyJosai International UniversityTokyoJapan
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7
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Rodrigues AD. Reimagining the Framework Supporting the Static Analysis of Transporter Drug Interaction Risk; Integrated Use of Biomarkers to Generate
Pan‐Transporter
Inhibition Signatures. Clin Pharmacol Ther 2022; 113:986-1002. [PMID: 35869864 DOI: 10.1002/cpt.2713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/14/2022] [Indexed: 11/11/2022]
Abstract
Solute carrier (SLC) transporters present as the loci of important drug-drug interactions (DDIs). Therefore, sponsors generate in vitro half-maximal inhibitory concentration (IC50 ) data and apply regulatory agency-guided "static" methods to assess DDI risk and the need for a formal clinical DDI study. Because such methods are conservative and high false-positive rates are likely (e.g., DDI study triggered when liver SLC R value ≥ 1.04 and renal SLC maximal unbound plasma (Cmax,u )/IC50 ratio ≥ 0.02), investigators have attempted to deploy plasma- and urine-based SLC biomarkers in phase I studies to de-risk DDI and obviate the need for drug probe-based studies. In this regard, it was possible to generate in-house in vitro SLC IC50 data for various clinically (biomarker)-qualified perpetrator drugs, under standard assay conditions, and then estimate "% inhibition" for each SLC and relate it empirically to published clinical biomarker data (area under the plasma concentration vs. time curve (AUC) ratio (AUCR, AUCinhibitor /AUCreference ) and % decrease in renal clearance (ΔCLrenal )). After such a "calibration" exercise, it was determined that only compounds with high R values (> 1.5) and Cmax,u /IC50 ratios (> 0.5) are likely to significantly modulate liver (AUCR > 1.25) and renal (ΔCLrenal > 25%) biomarkers and evoke DDI risk. The % inhibition approach supports integration of liver and renal SLC data and allows one to generate pan-SLC inhibition signatures for different test perpetrators (e.g., SLC % inhibition ranking). In turn, such signatures can guide the selection of the most appropriate individual (or combinations of) biomarkers for testing in phase I studies.
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Affiliation(s)
- A. David Rodrigues
- Pharmacokinetics & Drug Metabolism, Medicine Design, Worldwide Research & Development, Pfizer Inc Groton CT USA
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8
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Takubo H, Bessho K, Watari R, Shigemi R. Quantitative prediction of OATP1B-mediated drug-drug interactions using endogenous biomarker coproporphyrin I. Xenobiotica 2022; 52:397-404. [PMID: 35638858 DOI: 10.1080/00498254.2022.2085210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
1. Evaluation of the organic anion transporting polypeptide (OATP) 1B-mediated drug-drug interaction (DDI) potential is important for drug development. The focus of this study was coproporphyrin I (CP-I), an endogenous OATP1B biomarker.2. We investigated a new approach to OATP1B-mediated DDI prediction based on the mechanistic static pharmacokinetics (MSPK) model.3. The ratio of the area under the plasma concentration-time curve (AUCR) with and without co-administration of rifampicin (a typical OATP1B inhibitor) was found for CP-I and OATP1B substrate, respectively, and was then used to derive the correlation curve equation. The AUCR with and without co-administration of another OATP1B inhibitor than rifampicin was then predicted for the OATP1B substrates by substituting the AUCR of CP-I in the correlation curve equation to verify the predictability of the AUCR of the OATP1B substrates.4. The derived correlation curve equation between CP-I and the OATP1B substrates of the AUCRs with and without co-administration of rifampicin matched the observed AUCRs well. Regarding pitavastatin, rosuvastatin and pravastatin, 92.9% of the predicted AUCR values were within a two-fold range of the observed values, indicating that this approach may be a good way to quantitatively predict DDI potential.
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Affiliation(s)
- Hiroaki Takubo
- Japan Pharmaceutical Manufacturers Association.,Torii Pharmaceutical Co., Ltd., Osaka, Japan
| | - Koji Bessho
- Japan Pharmaceutical Manufacturers Association.,Asahi Kasei Pharma Corporation, Shizuoka, Japan
| | - Ryosuke Watari
- Japan Pharmaceutical Manufacturers Association.,Shionogi & Co., Ltd., Osaka, Japan
| | - Ryota Shigemi
- Japan Pharmaceutical Manufacturers Association.,Bayer Yakuhin, Ltd., Osaka, Japan
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9
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Medwid S, Price HR, Taylor DP, Mailloux J, Schwarz UI, Kim RB, Tirona RG. Organic Anion Transporting Polypeptide 2B1 (OATP2B1) Genetic Variants: In Vitro Functional Characterization and Association With Circulating Concentrations of Endogenous Substrates. Front Pharmacol 2021; 12:713567. [PMID: 34594217 PMCID: PMC8476882 DOI: 10.3389/fphar.2021.713567] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 08/23/2021] [Indexed: 12/12/2022] Open
Abstract
Organic anion transporting polypeptide 2B1 (OATP2B1, gene SLCO2B1) is an uptake transporter that is thought to determine drug disposition and in particular, the oral absorption of medications. At present, the clinical relevance of SLCO2B1 genetic variation on pharmacokinetics is poorly understood. We sought to determine the functional activity of 5 of the most common missense OATP2B1 variants (c.76_84del, c.601G>A, c.917G>A, c.935G>A, and c.1457C>T) and a predicted dysfunctional variant (c.332G>A) in vitro. Furthermore, we measured the basal plasma concentrations of endogenous OATP2B1 substrates, namely estrone sulfate, dehydroepiandrosterone sulfate (DHEAS), pregnenolone sulfate, coproporphyrin I (CPI), and CPIII, and assessed their relationships with SLCO2B1 genotypes in 93 healthy participants. Compared to reference OATP2B1, the transport activities of the c.332G>A, c.601G>A and c.1457C>T variants were reduced among the substrates examined (estrone sulfate, DHEAS, CPI, CPIII and rosuvastatin), although there were substrate-dependent effects. Lower transport function of OATP2B1 variants could be explained by diminished cell surface expression. Other OATP2B1 variants (c.76-84del, c.917G>A and c.935G>A) had similar activity to the reference transporter. In the clinical cohort, the SLCO2B1 c.935G>A allele was associated with both higher plasma CPI (42%) and CPIII (31%) concentrations, while SLCO2B1 c.917G>A was linked to lower plasma CPIII by 28% after accounting for the effects of age, sex, and SLCO1B1 genotypes. No association was observed between SLCO2B1 variant alleles and estrone sulfate or DHEAS plasma concentrations, however 45% higher plasma pregnenolone sulfate level was associated with SLCO2B1 c.1457C>T. Taken together, we found that the impacts of OATP2B1 variants on transport activities in vitro were not fully aligned with their associations to plasma concentrations of endogenous substrates in vivo. Additional studies are required to determine whether circulating endogenous substrates reflect OATP2B1 activity.
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Affiliation(s)
- Samantha Medwid
- Department of Physiology & Pharmacology, University of Western Ontario, London, ON, Canada.,Division of Clinical Pharmacology, Department of Medicine, University of Western Ontario, London, ON, Canada
| | - Hayley R Price
- Department of Physiology & Pharmacology, University of Western Ontario, London, ON, Canada
| | - Daniel P Taylor
- Department of Physiology & Pharmacology, University of Western Ontario, London, ON, Canada
| | - Jaymie Mailloux
- Department of Physiology & Pharmacology, University of Western Ontario, London, ON, Canada.,Division of Clinical Pharmacology, Department of Medicine, University of Western Ontario, London, ON, Canada
| | - Ute I Schwarz
- Department of Physiology & Pharmacology, University of Western Ontario, London, ON, Canada.,Division of Clinical Pharmacology, Department of Medicine, University of Western Ontario, London, ON, Canada
| | - Richard B Kim
- Department of Physiology & Pharmacology, University of Western Ontario, London, ON, Canada.,Division of Clinical Pharmacology, Department of Medicine, University of Western Ontario, London, ON, Canada.,Department of Oncology, Schulich School of Medicine, University of Western Ontario, London, ON, Canada
| | - Rommel G Tirona
- Department of Physiology & Pharmacology, University of Western Ontario, London, ON, Canada.,Division of Clinical Pharmacology, Department of Medicine, University of Western Ontario, London, ON, Canada
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10
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Kinzi J, Grube M, Meyer Zu Schwabedissen HE. OATP2B1 - The underrated member of the organic anion transporting polypeptide family of drug transporters? Biochem Pharmacol 2021; 188:114534. [PMID: 33794186 DOI: 10.1016/j.bcp.2021.114534] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/21/2021] [Accepted: 03/23/2021] [Indexed: 12/28/2022]
Abstract
The organic anion transporting polypeptide 2B1 (OATP2B1) was one of the first cloned members of the SLCO family. However, its physiological and pharmacological role is still poorly understood, and object of a current debate on the transporter's relevance. Within this commentary, we summarize the data currently available on the transporter's expression and its substrates and highlight the strength and difficulties of the methods that have been applied to gather these data. The conclusion drawn from these findings was that OATP2B1 due to its intestinal expression is most likely involved in oral drug absorption of its substrate and therefore prone for interactions. This has been tested in in vivo drug interaction and/or pharmacogenetic studies. While some of these support the notion of OATP2B1 being of relevance in drug absorption, the pharmacogenetic findings are rather inconclusive. We will explain our thoughts why OATP2B1 may not influence the general systemic pharmacokinetic of certain substrates, but possibly local distribution processes, like the transfer across the blood-brain-barrier. Besides the pharmacokinetic aspects, there are data on endogenous molecules like coproporphyrins and sulfated steroids. Therefore, we will also highlight possible physiological roles of OATP2B1, which are driven by its expression pattern in the tubular cells of the kidney as well as its expression in the blood brain barrier. Finally we also deal with the advantages and disadvantages in the use of animal models to decipher the role of OATP2B1 in pharmacokinetics of its substrates and beyond.
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Affiliation(s)
- Jonny Kinzi
- Biopharmacy, Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland
| | - Markus Grube
- Center of Drug Absorption and Transport, University Medicine Greifswald, Greifswald, Germany
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