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Makita-Chingombe F, Podany AT, Mykris T, Muzambi F, Browne RW, Ocque AJ, DiFrancesco R, Winchester LC, Fletcher CV, Mudzviti T, Maponga CC, Morse GD. Cross-validation of a high-performance liquid chromatography nevirapine plasma assay in a resource-limited setting in Zimbabwe. Afr J Lab Med 2021; 10:1264. [PMID: 34395199 PMCID: PMC8335789 DOI: 10.4102/ajlm.v10i1.1264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 02/24/2021] [Indexed: 11/02/2022] Open
Abstract
An international HIV pharmacology specialty laboratory (PSL) was established at the University of Zimbabwe to increase bioanalytical and investigator capacities. Quantitation of plasma nevirapine in samples from the AIDS Clinical Trials Group protocol 5279 was compared between the University of Nebraska Medical Center PSL and the University of Zimbabwe PSL. Both PSLs employed internally developed methods utilising reverse-phase high-performance liquid chromatography with ultraviolet detection. Eighty-seven percent of the cross-validation results exhibited ± 20% difference.
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Affiliation(s)
- Faithful Makita-Chingombe
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe
| | - Anthony T Podany
- Antiviral Pharmacology Laboratory, University of Nebraska Medical Center, Omaha, Nebraska, United States
| | - Timothy Mykris
- Antiviral Pharmacology Laboratory, University of Nebraska Medical Center, Omaha, Nebraska, United States
| | - Farai Muzambi
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe
| | - Richard W Browne
- Translational Pharmacology Research Core, Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, United States
| | - Andrew J Ocque
- Translational Pharmacology Research Core, Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, United States
| | - Robin DiFrancesco
- Translational Pharmacology Research Core, Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, United States
| | - Lee C Winchester
- Antiviral Pharmacology Laboratory, University of Nebraska Medical Center, Omaha, Nebraska, United States
| | - Courtney V Fletcher
- Antiviral Pharmacology Laboratory, University of Nebraska Medical Center, Omaha, Nebraska, United States
| | - Tinashe Mudzviti
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe
| | - Charles C Maponga
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe.,Translational Pharmacology Research Core, Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, United States
| | - Gene D Morse
- Translational Pharmacology Research Core, Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, United States
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Ma Q, Ocque AJ, Morse GD, Sanders C, Burgi A, Little SJ, Letendre SL. Switching to Tenofovir Alafenamide in Elvitegravir-Based Regimens: Pharmacokinetics and Antiviral Activity in Cerebrospinal Fluid. Clin Infect Dis 2021; 71:982-988. [PMID: 31560741 DOI: 10.1093/cid/ciz926] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 09/16/2019] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Tenofovir alafenamide fumarate (TAF) co-formulated with elvitegravir (EVG; E), cobicistat (C), and emtricitabine (F), a recommended antiretroviral regimen, was evaluated for distribution and antiviral activity in cerebrospinal fluid (CSF) as well as neurocognitive (NC) performance change in participants switching from E/C/F/tenofovir disoproxil fumarate (TDF) to E/C/F/TAF. METHODS This was a 24-week, single-arm, open-label study in treatment-experienced adults living with human immunodeficiency virus (HIV). Nine participants switched from E/C/F/TDF (150/150/200/300 mg once daily) to E/C/F/TAF (150/150/200/10 mg once daily) at week 12. CSF and total plasma concentrations of EVG, TDF, TAF, tenofovir (TFV), and HIV RNA levels were measured at baseline and week 24. NC performance was estimated by the Montreal Cognitive Assessment. RESULTS EVG concentrations in CSF and the CSF:plasma ratio remained stable (P = .203) over time. Following the switch, TFV concentrations in CSF and plasma declined (P = .004), although the TFV CSF:plasma ratio increased (P = .004). At week 24, median TAF plasma concentration was 11.05 ng/mL (range, 2.84-147.1 ng/mL) 2 hours postdose but was below assay sensitivity 6 hours after dosing. TAF was below assay sensitivity in all CSF specimens. HIV RNA was ≤40 copies/mL in all CSF and plasma specimens. Three participants (33%) had NC impairment at baseline and 2 (22%) remained impaired at week 24. CONCLUSIONS Switch to E/C/F/TAF was associated with reductions in TFV concentrations in CSF but stable EVG concentrations that exceeded the 50% inhibitory concentration for wild-type HIV, suggesting that EVG achieves therapeutic concentrations in the central nervous system. No virologic failure or significant NC changes were detected following the switch. CLINICAL TRIALS REGISTRATION NCT02251236.
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Affiliation(s)
- Qing Ma
- University at Buffalo, Buffalo, New York, USA
| | | | | | - Chelsea Sanders
- University of California, San Diego, La Jolla, California, USA
| | - Alina Burgi
- University of California, San Diego, La Jolla, California, USA
| | - Susan J Little
- University of California, San Diego, La Jolla, California, USA
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Makita-Chingombe F, Ocque AJ, DiFrancesco R, Maponga C, Muzambi F, Monera-Penduka TG, Mudzviti T, Mtisi TJ, Morse GD. Development and validation of a high performance liquid chromatography method to determine nevirapine in plasma in a resource-limited setting. Afr J Lab Med 2019; 8:880. [PMID: 31205870 PMCID: PMC6556864 DOI: 10.4102/ajlm.v8i1.880] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 11/02/2018] [Indexed: 12/14/2022] Open
Abstract
Background There are several instances where nevirapine pharmacokinetic monitoring may be useful, such as in special populations or pharmacokinetic drug interaction studies that require the ascertainment of nevirapine pharmacokinetics in the sub-Saharan region. Objectives The main aim of this study was to produce a validated, sustainable and relevant nevirapine assay method that meets bio-analytical regulatory requirements. Methods The developed method utilised a Waters 2795 Alliance high performance liquid chromatography system with a 2996 photo diode array detector, an Atlantis dC18 5 micron, 3.9 mm × 150 mm analytical column and a gradient flow rate of 1 mL/min. Ultraviolet detection data were collected from 210 nm to 400 nm, extracted at 260 nm, and processed for nevirapine and internal standard peak height responses. Results The method proved to be linear (R2 0.995), precise (+1.92% – +9.69%) and accurate (-9.70% – 12.0%). Recovery for the analyte and internal standard was between 98.8% and 114%. The method showed good specificity as no interferences were caused by common African traditional medicines, anti-tuberculosis medications or other concomitant antiretrovirals nor endogenous components. Conclusion The method is reproducible, relevant to our setting and uses considerably low plasma volumes with preservation of some consumables, a desirable key factor in a resource-limited setting.
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Affiliation(s)
- Faithful Makita-Chingombe
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Science, Harare, Zimbabwe
| | - Andrew J Ocque
- Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Translational Pharmacology Research Core, New York State Center of Excellence in Bioinformatics and Life Sciences, The State University of New York, Buffalo, New York, United States
| | - Robin DiFrancesco
- Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Translational Pharmacology Research Core, New York State Center of Excellence in Bioinformatics and Life Sciences, The State University of New York, Buffalo, New York, United States
| | - Charles Maponga
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Science, Harare, Zimbabwe.,Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Translational Pharmacology Research Core, New York State Center of Excellence in Bioinformatics and Life Sciences, The State University of New York, Buffalo, New York, United States
| | - Farai Muzambi
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Science, Harare, Zimbabwe
| | - Tsitsi G Monera-Penduka
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Science, Harare, Zimbabwe
| | - Tinashe Mudzviti
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Science, Harare, Zimbabwe
| | - Takudzwa J Mtisi
- International Pharmacology Specialty Laboratory, School of Pharmacy, University of Zimbabwe College of Health Science, Harare, Zimbabwe
| | - Gene D Morse
- Center for Integrated Global Biomedical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Translational Pharmacology Research Core, New York State Center of Excellence in Bioinformatics and Life Sciences, The State University of New York, Buffalo, New York, United States
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Ocque AJ, Hagler CE, DiFrancesco R, Lombardo J, Morse GD. Development and validation of an assay to measure cannabidiol and Δ9-tetrahydrocannabinol in human EDTA plasma by UHPLC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1112:56-60. [PMID: 30852450 DOI: 10.1016/j.jchromb.2019.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/01/2019] [Accepted: 03/02/2019] [Indexed: 10/27/2022]
Abstract
The therapeutic use of cannabinoids has increased with providers often recommending cannabinoid-containing products with limited pre-clinical and clinical pharmacokinetic studies. An ultra-performance liquid chromatography with triple quadrupole mass spectrometry method was developed and validated for the determination of cannabidiol and Δ9-tetrahydrocannabinol in human ethylenediaminetetraacetic acid (EDTA) plasma. The cannabinoids are extracted from plasma with a liquid-liquid procedure utilizing methyl tert-butyl ether. UHPLC Separation was achieved with a Waters Acquity HSS T3 column (100 × 2.1 mm, 1.8 μm) under isocratic conditions (18:82:0.02 water:methanol:formic acid v/v/v). The run time was 8.5 min. Detection of analytes was achieved using electrospray ionization and triple quadrupole selected reaction monitoring. Standard curve concentrations ranged from 0.5 to 250 ng/mL for cannabidiol and Δ9-tetrahydrocannabinol. The intra- and inter-day accuracy (% bias) and precision (relative standard deviation) were <9.20% in low, medium, and high quality control samples. The validated method was applied to the analysis of donated human EDTA plasma. The assay provides an important patient monitoring capability to determine variability in clinical pharmacokinetics during use of cannabinoid-containing products.
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Affiliation(s)
- Andrew J Ocque
- Translational Pharmacology Research Core and Cannabinoid Sciences Program, Center for Integrated Global Biomedical Sciences, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, NY, USA.
| | - Colleen E Hagler
- Translational Pharmacology Research Core and Cannabinoid Sciences Program, Center for Integrated Global Biomedical Sciences, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Robin DiFrancesco
- Translational Pharmacology Research Core and Cannabinoid Sciences Program, Center for Integrated Global Biomedical Sciences, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Jeffrey Lombardo
- Translational Pharmacology Research Core and Cannabinoid Sciences Program, Center for Integrated Global Biomedical Sciences, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, NY, USA
| | - Gene D Morse
- Translational Pharmacology Research Core and Cannabinoid Sciences Program, Center for Integrated Global Biomedical Sciences, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, NY, USA
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Ocque AJ, Hagler CE, DiFrancesco R, Morse GD, Talal AH. Ultra-performance liquid chromatography tandem mass spectrometry for determination of Direct Acting Antiviral drugs in human liver fine needle aspirates. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1052:103-109. [PMID: 28365413 DOI: 10.1016/j.jchromb.2017.03.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 02/14/2017] [Accepted: 03/22/2017] [Indexed: 11/28/2022]
Abstract
An ultra-performance liquid chromatography with triple quadrupole mass spectrometry method was developed and validated for the determination of direct acting antiviral drug concentrations in human liver fine needle aspirates. Liver fine needle aspirate (FNA) biopsy samples were homogenized in acetonitrile to stabilize the analytes and precipitate protein. The acetonitrile supernatants were diluted with internal standards and mobile phase. Separation was achieved with a Waters Acquity BEH C18 column (50×2.1mm, 1.7um) with a gradient elution of 0.1% formic acid in water and acetonitrile. The total run time was 4.25min. Detection of analytes was achieved using electrospray ionization (positive mode) and triple quadrupole selected reaction monitoring. Standard curve concentrations ranged from 12.5 to 5000ng/mL for dasabuvir and the m1 metabolite of dasabuvir, 1.25 to 2500ng/mL for ombitasvir and ritonavir, and 5.00 to 5000ng/mL for paritaprevir. The intra- and inter-day accuracy and precision were less than 13.7% in low, medium, and high quality control samples. The validated method was applied to the analysis of a liver fine needle aspirate of a patient undergoing direct acting antiviral therapy for hepatitis C virus.
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Affiliation(s)
- Andrew J Ocque
- Translational Pharmacology Research Core, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, New York State Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, Buffalo, NY, USA.
| | - Colleen E Hagler
- Translational Pharmacology Research Core, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, New York State Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, Buffalo, NY, USA
| | - Robin DiFrancesco
- Translational Pharmacology Research Core, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, New York State Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, Buffalo, NY, USA
| | - Gene D Morse
- Translational Pharmacology Research Core, Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, New York State Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, Buffalo, NY, USA
| | - Andrew H Talal
- Division of Gastroenterology and Hepatology and Center for Clinical and Research in Liver Disease, Jacobs School of Medicine, University at Buffalo, Buffalo, NY, USA
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Alshogran OY, Ocque AJ, Leblond FA, Pichette V, Nolin TD. Validation and Application of a Simple UHPLC-MS-MS Method for the Enantiospecific Determination of Warfarin in Human Urine. J Chromatogr Sci 2015; 54:554-60. [PMID: 26657732 DOI: 10.1093/chromsci/bmv186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Indexed: 11/14/2022]
Abstract
A simple and rapid liquid chromatographic-tandem mass spectrometric method has been developed and validated for the enantiospecific determination of R- and S-warfarin in human urine. Warfarin enantiomers were extracted from urine using methyl tert-butyl ether. Chromatographic separation of warfarin enantiomers and the internal standard d5-warfarin was achieved using a Astec Chirobiotic V column with gradient mobile phase at a flow rate of 400 µL/min over 10 min. Detection was performed on a TSQ Quantum Ultra triple quadrupole mass spectrometer equipped with a heated electrospray ionization source. Analytes were detected in negative ionization mode using selected reaction monitoring. Calibration curves were linear with a correlation coefficient of ≥0.996 for both enantiomers over a concentration range of 5-500 ng/mL. The intra- and interday accuracy and precision for both analytes were within ±9.0%. Excellent extraction efficiency and negligible matrix effects were observed. The applicability of the method was demonstrated by successful measurement of warfarin enantiomers in urine of patients with kidney disease. The method is simple, accurate and reproducible and is currently being used to support warfarin pharmacokinetic studies.
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Affiliation(s)
- Osama Y Alshogran
- Center for Clinical Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA
| | - Andrew J Ocque
- Center for Clinical Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA Department of Pharmacy and Therapeutics, School of Pharmacy, University of Pittsburgh, 208 Salk Pavillion, 335 Sutherland Drive, Pittsburgh, PA 15260, USA
| | - François A Leblond
- Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
| | - Vincent Pichette
- Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada Département de Pharmacologie, Université de Montréal, Montréal, QC, Canada
| | - Thomas D Nolin
- Center for Clinical Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA Department of Pharmacy and Therapeutics, School of Pharmacy, University of Pittsburgh, 208 Salk Pavillion, 335 Sutherland Drive, Pittsburgh, PA 15260, USA
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Alshogran OY, Naud J, Ocque AJ, Leblond FA, Pichette V, Nolin TD. Effect of experimental kidney disease on the functional expression of hepatic reductases. Drug Metab Dispos 2014; 43:100-6. [PMID: 25332430 DOI: 10.1124/dmd.114.061150] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Chronic kidney disease (CKD) affects the nonrenal clearance of drugs by modulating the functional expression of hepatic drug-metabolizing enzymes and transporters. The impact of CKD on oxidative and conjugative metabolism has been extensively studied. However, its effect on hepatic drug reduction, an important phase I drug-metabolism pathway, has not been investigated. We aimed to assess the effect of experimental CKD on hepatic reduction using warfarin as a pharmacological probe substrate. Cytosolic and microsomal cellular fractions were isolated from liver tissue harvested from five-sixths-nephrectomized and control rats (n = 10 per group). The enzyme kinetics for warfarin reduction were evaluated in both fractions, and formation of warfarin alcohols was used as an indicator of hepatic reductase activity. Selective inhibitors were employed to identify reductases involved in warfarin reduction. Gene and protein expression of reductases were determined using quantitative real-time polymerase chain reaction and Western blotting, respectively. Formation of RS/SR-warfarin alcohol was decreased by 39% (P < 0.001) and 43% (P < 0.01) in cytosol and microsomes, respectively, in CKD rats versus controls. However, RR/SS-warfarin alcohol formation was unchanged in the cytosol, and a trend toward its decreased production was observed in microsomes. Gene and protein expression of cytosolic carbonyl reductase 1 and aldo-keto reductase 1C3/18, and microsomal 11β-hydroxysteroid dehydrogenase type 1 were significantly reduced by >30% (P < 0.05) in CKD rats compared with controls. Collectively, these results suggest that the functional expression of hepatic reductases is selectively decreased in kidney disease. Our findings may explain one mechanism for altered nonrenal clearance, exposure, and response of drugs in CKD patients.
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Affiliation(s)
- Osama Y Alshogran
- Center for Clinical Pharmaceutical Sciences (O.Y.A., A.J.O., T.D.N.), Department of Pharmaceutical Sciences (O.Y.A.) and Department of Pharmacy and Therapeutics (T.D.N.), School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania; and Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont (J.N., F.A.L., V.P.), Département de Pharmacologie (V.P.), Université de Montréal, Montréal, Québec, Canada
| | - Judith Naud
- Center for Clinical Pharmaceutical Sciences (O.Y.A., A.J.O., T.D.N.), Department of Pharmaceutical Sciences (O.Y.A.) and Department of Pharmacy and Therapeutics (T.D.N.), School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania; and Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont (J.N., F.A.L., V.P.), Département de Pharmacologie (V.P.), Université de Montréal, Montréal, Québec, Canada
| | - Andrew J Ocque
- Center for Clinical Pharmaceutical Sciences (O.Y.A., A.J.O., T.D.N.), Department of Pharmaceutical Sciences (O.Y.A.) and Department of Pharmacy and Therapeutics (T.D.N.), School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania; and Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont (J.N., F.A.L., V.P.), Département de Pharmacologie (V.P.), Université de Montréal, Montréal, Québec, Canada
| | - François A Leblond
- Center for Clinical Pharmaceutical Sciences (O.Y.A., A.J.O., T.D.N.), Department of Pharmaceutical Sciences (O.Y.A.) and Department of Pharmacy and Therapeutics (T.D.N.), School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania; and Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont (J.N., F.A.L., V.P.), Département de Pharmacologie (V.P.), Université de Montréal, Montréal, Québec, Canada
| | - Vincent Pichette
- Center for Clinical Pharmaceutical Sciences (O.Y.A., A.J.O., T.D.N.), Department of Pharmaceutical Sciences (O.Y.A.) and Department of Pharmacy and Therapeutics (T.D.N.), School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania; and Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont (J.N., F.A.L., V.P.), Département de Pharmacologie (V.P.), Université de Montréal, Montréal, Québec, Canada
| | - Thomas D Nolin
- Center for Clinical Pharmaceutical Sciences (O.Y.A., A.J.O., T.D.N.), Department of Pharmaceutical Sciences (O.Y.A.) and Department of Pharmacy and Therapeutics (T.D.N.), School of Pharmacy, University of Pittsburgh, Pittsburgh, Pennsylvania; and Service de Néphrologie et Centre de Recherche, Hôpital Maisonneuve-Rosemont (J.N., F.A.L., V.P.), Département de Pharmacologie (V.P.), Université de Montréal, Montréal, Québec, Canada
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Alshogran OY, Ocque AJ, Zhao J, Day BW, Leblond FA, Pichette V, Nolin TD. Determination of warfarin alcohols by ultra-high performance liquid chromatography–tandem mass spectrometry: Application to in vitro enzyme kinetic studies. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 944:63-8. [DOI: 10.1016/j.jchromb.2013.11.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 10/11/2013] [Accepted: 11/06/2013] [Indexed: 10/26/2022]
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Fujimoto VY, Bloom MS, Huddleston HG, Shelley WB, Ocque AJ, Browne RW. Correlations of follicular fluid oxidative stress biomarkers and enzyme activities with embryo morphology parameters during in vitro fertilization. Fertil Steril 2011; 96:1357-61. [DOI: 10.1016/j.fertnstert.2011.09.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 09/01/2011] [Accepted: 09/16/2011] [Indexed: 02/03/2023]
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