1
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Eylem CC, Nemutlu E, Dogan A, Acik V, Matyar S, Gezercan Y, Altintas S, Okten AI, Basci Akduman NE. High-Throughput Single-Step plasma sample extraction optimization strategies with experimental design for LC-MS and GC–MS integrated metabolomics and lipidomics analysis. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Liu C, Zhu M, Cao L, Boucetta H, Song M, Hang T, Lu Y. Simultaneous determination of nirmatrelvir and ritonavir in human plasma by LC-MS/MS and its pharmacokinetic application in healthy Chinese subjects. Biomed Chromatogr 2022; 36:e5456. [PMID: 35881032 DOI: 10.1002/bmc.5456] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/02/2022] [Accepted: 07/06/2022] [Indexed: 11/08/2022]
Abstract
Paxlovid, a co-packaged medication of nirmatrelvir tablets (150 mg) and ritonavir tablets (100 mg) developed by Pfizer, is one of the first orally accessible COVID-19 antiviral medicines to be approved for the emergency usage. In this research, an efficient LC-MS/MS method for simultaneous determining nirmatrelvir and ritonavir in human plasma was established and validated with remdesivir as an internal standard. Chromatographic separations were carried out on a Thermo BDS Hypersil C18 (4.6mm×100, 2.4μm) column using deionized water and methanol as mobile phase, both added with 0.1% (v/v) formic acid. Based on the positive electrospray ionization mode, nirmatrelvir and ritonavir were analyzed by selective reaction monitoring. Excellent precision, accuracy, recovery, and linearity were demonstrated covering the range of 50-5000 ng/mL for nirmatrelvir and 10-1000 ng/mL for ritonavir. Then, the established method was utilized to the pharmacokinetic profile of Paxlovid in healthy Chinese subjects. The Pharmacokinetic parameters, including Cmax , Tmax , t1/2 and AUC0-∞ of western subjects correspond well with the results of this pharmacokinetic investigation.
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Affiliation(s)
- Chenxi Liu
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, China.,Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Miqun Zhu
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, China.,Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Liyun Cao
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, China.,Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Hamza Boucetta
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, China.,Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Min Song
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, China.,Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Taijun Hang
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, China.,Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Yuting Lu
- China National Narcotics Control Commission-China Pharmaceutical University Joint Laboratory on Key Technologies of Narcotics Control, China.,Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
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3
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Wong EYL, Loh GOK, Goh CZ, Tan YTF, Ng SSM, Law KB, Cheah KY, Mohd HF, Peh KK. Sample preparation and quantification of polar drug, allopurinol, in human plasma using LCMSMS. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2022; 28:35-46. [PMID: 35668610 DOI: 10.1177/14690667221105837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A fast, selective and reproducible LC-MS/MS method with simple sample preparation was developed and validated for a polar compound, allopurinol in human plasma, using acyclovir as internal standard (IS). Chromatographic separation was achieved using Agilent Poroshell 120 EC-C18 (100 × 2.1 mmID, 2.7 µm) analytical column. The mobile phase was comprised of 0.1%v/v formic acid-methanol (95:05; v/v), at a flow rate of 0.45 mL/min. The effect of different protein precipitation agents used in sample preparation such as methanol, acetonitrile, a mixture of acetonitrile-methanol and a mixture of acetonitrile-acetone were evaluated to optimize the extraction efficiency of allopurinol and IS. The use of acetone-acetonitrile (50:50, v/v) as protein precipitating agent shortened the sample preparation time and improved the recovery of allopurinol to above 93%. The IS-normalised matrix factors at two concentration levels were 1.0, with CV of 5.1% and 4.2%. Allopurinol in plasma was stable at benchtop for 24 h, in autosampler tray for 48 h, in instrumentation room for 48 h, in freezer after 7 freeze-thaw cycles and in freezer for 140 days. Allopurinol stock standard solutions were stable for 140 days at room temperature and in the chiller. The short sample run time of the validated bioanalytical method allowed high throughput analysis of plasma samples in pharmacokinetic study of an allopurinol formulation. The robustness and reproducibility of the bioanalytical method was reaffirmed through incurred sample reanalysis (ISR).
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Affiliation(s)
| | | | - Chen Zhu Goh
- 619929Bioxis Sdn Bhd, Simpang Ampat, Pulau Pinang, Malaysia
| | | | - Sharon Shi Min Ng
- Centre for Clinical Trial, Institute for Clinical Research, 576396Ampang Hospital, Ministry of Health, Ampang, Selangor, Malaysia
| | - Kian Boon Law
- Centre for Clinical Trial, Institute for Clinical Research, 576396Ampang Hospital, Ministry of Health, Ampang, Selangor, Malaysia
| | - Kit Yee Cheah
- Centre for Clinical Trial, Institute for Clinical Research, 576396Ampang Hospital, Ministry of Health, Ampang, Selangor, Malaysia
| | - Hani Farhana Mohd
- Centre for Clinical Trial, Institute for Clinical Research, 576396Ampang Hospital, Ministry of Health, Ampang, Selangor, Malaysia
| | - Kok Khiang Peh
- School of Pharmaceutical Sciences, 26689Universiti Sains Malaysia, Minden, Penang, Malaysia
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4
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Harmoko H, Kartasasmita RE, Munawar H, Rakhmawati A, Budiawan B. Determination of histamine in different compositions of commercially canned fish in Indonesia by modified QuEChERS and LC-MS/MS. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2021.104256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Kim NA, Yu HW, Noh GY, Park SK, Kang W, Jeong SH. Protein microbeadification to achieve highly concentrated protein formulation with reversible properties and in vivo pharmacokinetics after reconstitution. Int J Biol Macromol 2021; 185:935-948. [PMID: 34237365 DOI: 10.1016/j.ijbiomac.2021.07.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 10/20/2022]
Abstract
A protein precipitation technique was optimized to produce biophysically stable 'protein microbeads', applicable to highly concentrated protein formulation. Initially, production of BSA microbeads was performed using rapid dehydration by vortexing in organic solvents followed by cold ethanol treatment and a vacuum drying. Out of four solvents, n-octanol produced the most reversible microbeads upon reconstitution. A Shirasu porous glass (SPG) membrane emulsification technique was utilized to enhance the size distribution and manufacturing process of the protein microbeads with a marketized human IgG solution. Process variants such as dehydration time, temperature, excipients, drying conditions, and initial protein concentration were evaluated in terms of the quality of IgG microbeads and their reversibility. The hydrophobized SPG membrane produced a narrow size distribution of the microbeads, which were further enhanced by shorter dehydration time, low temperature, minimized the residual solvents, lower initial protein concentration, and addition of trehalose to the IgG solution. Final reversibility of the IgG microbeads with trehalose was over 99% at both low and high protein concentrations. Moreover, the formulation was highly stable under repeated mechanical shocks and at an elevated temperature compared to its liquid state. Its in vivo pharmacokinetic profiles in rats were consistent before and after the 'microbeadification'.
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Affiliation(s)
- Nam Ah Kim
- College of Pharmacy, Dongguk University-Seoul, Gyeonggi 13026, Republic of Korea.
| | - Hyun Woo Yu
- College of Pharmacy, Dongguk University-Seoul, Gyeonggi 13026, Republic of Korea
| | - Ga Yeon Noh
- College of Pharmacy, Dongguk University-Seoul, Gyeonggi 13026, Republic of Korea
| | - Sang-Koo Park
- College of Pharmacy, Dongguk University-Seoul, Gyeonggi 13026, Republic of Korea
| | - Wonku Kang
- College of Pharmacy, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Seong Hoon Jeong
- College of Pharmacy, Dongguk University-Seoul, Gyeonggi 13026, Republic of Korea.
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6
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Sakellariou P, Petrou M, Lyris E, Tsivou M, Fragkaki A, Kiousi P, Angelis YS, Pistos C. Determination of salmeterol, α-hydroxysalmeterol and fluticasone propionate in human urine and plasma for doping control using UHPLC-QTOF-MS. Biomed Chromatogr 2021; 35:e5114. [PMID: 33720401 DOI: 10.1002/bmc.5114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 03/01/2021] [Accepted: 03/08/2021] [Indexed: 01/03/2023]
Abstract
Salmeterol and fluticasone are included in the Prohibited List annually issued by the World Anti-Doping Agency. While for other permitted beta-2 agonists a threshold has been established, above which any finding constitutes an Adverse Analytical Finding, this is not the case with salmeterol. The salmeterol metabolite, α-hydroxysalmeterol, has been described as a potentially more suitable biomarker for the misuse of inhaled salmeterol. In this study, a new and rapid UHPLC-QTOF-MS method was developed and validated for the simultaneous quantification of salmeterol, α-hydroxysalmeterol and fluticasone in human urine and plasma, which can be used for doping control. The analytes of interest were extracted by means of solid phase extraction and were separated on a Zorbax Eclipse Plus C18 column. Detection was performed in a quadrupole time-of-flight mass spectrometer equipped with an electrospray ionization source, in positive mode for the detection of salmeterol and its metabolite and in negative mode for the detection of fluticasone. Method was validated over a linear range from 0.10 to 2.00 ng/ml for salmeterol and fluticasone, and from 1.00 to 20.0 ng/ml for α-hydroxysalmeterol, in urine, whereas in plasma, the linear range was from 0.025 to 0.500 ng/ml for salmeterol and fluticasone, respectively.
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Affiliation(s)
- Panagiotis Sakellariou
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Resarch "Demokritos", Maroussi, Greece.,Faculty of Biology, School of Science, National and Kapodistrian University of Athens, Athens, Greece
| | - Michael Petrou
- Cyprus Anti-Doping Authority, Nicosia, Cyprus.,University of Nicosia, Nicosia, Cyprus
| | - Emmanouil Lyris
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Resarch "Demokritos", Maroussi, Greece
| | - Maria Tsivou
- Dopingkontroll-Labor, Chemical Analytics Seibersdorf Labor GmbH, Seibersdorf, Austria
| | - Argyro Fragkaki
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Resarch "Demokritos", Maroussi, Greece
| | - Polyxeni Kiousi
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Resarch "Demokritos", Maroussi, Greece
| | - Yiannis S Angelis
- Doping Control Laboratory of Athens, Institute of Biosciences and Applications, National Centre for Scientific Resarch "Demokritos", Maroussi, Greece
| | - Constantinos Pistos
- Department of Chemistry, West Chester University of Pennsylvania, West Chester, PA, USA
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7
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Hu E, Hong FT, Aral J, Long J, Piper DE, Poppe L, Andrews KL, Hager T, Davis C, Li H, Wong P, Gavva N, Shi L, Zhu DXD, Lehto SG, Xu C, Miranda LP. Discovery of Selective Pituitary Adenylate Cyclase 1 Receptor (PAC1R) Antagonist Peptides Potent in a Maxadilan/PACAP38-Induced Increase in Blood Flow Pharmacodynamic Model. J Med Chem 2021; 64:3427-3438. [PMID: 33715378 DOI: 10.1021/acs.jmedchem.0c01396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Inhibition of the pituitary adenylate cyclase 1 receptor (PAC1R) is a novel mechanism that could be used for abortive treatment of acute migraine. Our research began with comparative analysis of known PAC1R ligand scaffolds, PACAP38 and Maxadilan, which resulted in the selection of des(24-42) Maxadilan, 6, as a starting point. C-terminal modifications of 6 improved the peptide metabolic stability in vitro and in vivo. SAR investigations identified synergistic combinations of amino acid replacements that significantly increased the in vitro PAC1R inhibitory activity of the analogs to the pM IC90 range. Our modifications further enabled deletion of up to six residues without impacting potency, thus improving peptide ligand binding efficiency. Analogs 17 and 18 exhibited robust in vivo efficacy in the rat Maxadilan-induced increase in blood flow (MIIBF) pharmacodynamic model at 0.3 mg/kg subcutaneous dosing. The first cocrystal structure of a PAC1R antagonist peptide (18) with PAC1R extracellular domain is reported.
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Affiliation(s)
- Essa Hu
- Therapeutic Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Fang-Tsao Hong
- Therapeutic Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Jennifer Aral
- Therapeutic Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Jason Long
- Therapeutic Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Derek E Piper
- Therapeutic Discovery, Amgen Research, Amgen Inc., 1120 Veterans Blvd., South San Francisco, California 94080, United States
| | - Leszek Poppe
- Therapeutic Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Kristin L Andrews
- Therapeutic Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Todd Hager
- Pharmacokinetics and Drug Metabolism, Amgen Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Carl Davis
- Pharmacokinetics and Drug Metabolism, Amgen Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Hongyan Li
- Pharmacokinetics and Drug Metabolism, Amgen Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Philip Wong
- Pharmacokinetics and Drug Metabolism, Amgen Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Narender Gavva
- Neuroscience Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Licheng Shi
- Neuroscience Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Dawn X D Zhu
- Neuroscience Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Sonya G Lehto
- Neuroscience Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Cen Xu
- Neuroscience Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
| | - Les P Miranda
- Therapeutic Discovery, Amgen Inc., One Amgen Center Drive, Thousand Oaks, California 91320, United States
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8
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Varga E, Ladányi M, Fodor P, Soros C. Comparison of QuEChERS and "dilute and shoot" extraction methods for multi-mycotoxin analysis of samples from button mushroom ( Agaricus bisporus) cultivation. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2020; 56:99-108. [PMID: 33571042 DOI: 10.1080/03601234.2020.1852046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Several components of mushroom compost (wheat straw, chicken manure) can be contaminated with mycotoxins posing food health risks to mushroom consumers. To assess the relevance of such contaminations high-throughput analytical methods are needed. In this study, two sample preparation approaches, dilute & shoot (D&S) and modified citrate buffered Quick, Easy, Cheap, Effective, Rugged, Safe (QuEChERS) were compared in terms of extraction efficiency and matrix effect in case of 13 mycotoxins in complex matrices-wheat straw, the growing media and button mushrooms (Agaricus bisporus)-of mushroom cultivation using high-performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS). D&S method resulted in recoveries of LB medium, button mushroom and compost for ≥60% in case of all investigated mycotoxins except for DON-3G. However, using modified citrate buffered QuEChERS with 2% acidification of the extraction solvent showed the complete loss of strongly polar DON-3G and fumonisin B1 (FB1). The investigated matrices had suppressive effect on ionization in all target mycotoxins except for FB1. Regarding the use of isotopologues to compensate matrix effect, even U-[13C15]-DON and U-[13C24]-T-2 can also be used to quantify their related metabolites in the studied matrices, using internal standard method.
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Affiliation(s)
- Emese Varga
- Faculty of Food Science, Department of Applied Chemistry, Szent István University, Budapest, Hungary
| | - Márta Ladányi
- Faculty of Horticultural Science, Department of Biometrics and Agricultural Informatics, Szent István University, Budapest, Hungary
| | - Péter Fodor
- Faculty of Food Science, Department of Applied Chemistry, Szent István University, Budapest, Hungary
| | - Csilla Soros
- Faculty of Food Science, Department of Applied Chemistry, Szent István University, Budapest, Hungary
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9
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Siddiqui MA, Pandey S, Azim A, Sinha N, Siddiqui MH. Metabolomics: An emerging potential approach to decipher critical illnesses. Biophys Chem 2020; 267:106462. [PMID: 32911125 PMCID: PMC9986419 DOI: 10.1016/j.bpc.2020.106462] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/18/2020] [Accepted: 08/23/2020] [Indexed: 12/15/2022]
Abstract
Critical illnesses contribute to the maximum morbidity and mortality of hospitalized patients. Acute respiratory distress syndrome (ARDS) and sepsis/septic shock are the two most common acute illnesses associated with intensive care unit (ICU) admission. Once triggered, both have an identical underlying mechanism, portrayed by inflammation and endothelial dysfunction. The diagnosis of ARDS is based on clinical findings, laboratory tests, and radiological imaging. Blood cultures remain the gold standard for the diagnosis of sepsis, with the limitation of time delay and low positive yield. A combination of biomarkers has been proposed to diagnose and prognosticate these acute disorders with strengths and limitations, but still, the gold standard has been elusive to clinicians. In this review article, we illustrate the potential of metabolomics to unravel biomarkers that can be clinically utilized as a rapid prognostic and diagnostic tool associated with specific patient populations (ARDS and sepsis/septic shock) based on the available scientific data.
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Affiliation(s)
- Mohd Adnan Siddiqui
- Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India; Department of Bioengineering, Integral University, Lucknow 226026, India
| | - Swarnima Pandey
- Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India; Department of Zoology, Banaras Hindu University, Banaras 221005, India
| | - Afzal Azim
- Sanjay Gandhi Postgraduate Institute of Medical Sciences, Raebareli Road, Lucknow 226014, India.
| | - Neeraj Sinha
- Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India.
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10
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Acquavia MA, Foti L, Pascale R, Nicolò A, Brancaleone V, Cataldi TRI, Martelli G, Scrano L, Bianco G. Detection and quantification of Covid-19 antiviral drugs in biological fluids and tissues. Talanta 2020; 224:121862. [PMID: 33379073 PMCID: PMC7642756 DOI: 10.1016/j.talanta.2020.121862] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/30/2020] [Accepted: 11/02/2020] [Indexed: 12/15/2022]
Abstract
Since coronavirus disease 2019 (COVID-19) started as a fast-spreading pandemic, causing a huge number of deaths worldwide, several therapeutic options have been tested to counteract or reduce the clinical symptoms of patients infected with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Currently, no specific drugs for COVID-19 are available, but many antiviral agents have been authorised by several national agencies. Most of them are under investigation in both preclinical and clinical trials; however, pharmacokinetic and metabolism studies are needed to identify the most suitable dose to achieve the desired effect on SARS-CoV-2. Therefore, the efforts of the scientific community have focused on the screening of therapies able to counteract the most severe effects of the infection, as well as on the search of sensitive and selective analytical methods for drug detection in biological matrices, both fluids and tissues. In the last decade, many analytical methods have been proposed for the detection and quantification of antiviral compounds currently being tested for COVID-19 treatment. In this review, a critical discussion on the overall analytical procedure is provided, i.e (a) sample pre-treatment and extraction methods such as protein precipitation (PP), solid-phase extraction (SPE), liquid–liquid extraction (LLE), ultrasound-assisted extraction (UAE) and QuEChERS (quick, easy, cheap, effective, rugged and safe), (b) detection and quantification methods such as potentiometry, spectrofluorimetry and mass spectrometry (MS) as well as (c) methods including a preliminary separation step, such as high performance liquid chromatography (HPLC) and capillary electrophoresis (CE) coupled to UV–Vis or MS detection. Further current trends, advantages and disadvantages and prospects of these methods have been discussed, to help the analytical advances in reducing the harm caused by the SARS-CoV-2 virus. Fourteen antiviral drugs were tested to counteract the effects of COVID-19. A review of analytical methods for antivirals detection is presented. Method validation, drugs extraction, separation and detection are discussed. LC-MS and MS/MS is mostly used for accurate and sensitive drugs quantification.
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Affiliation(s)
- Maria A Acquavia
- Università Degli Studi Della Basilicata, Dipartimento di Scienze, Via Dell'Ateneo Lucano, 10-85100, Potenza, Italy; ALMAGISI S.r.l Corso Italia, 27-39100, Bolzano, Italy.
| | - Luca Foti
- Università Degli Studi Della Basilicata, Dipartimento di Scienze, Via Dell'Ateneo Lucano, 10-85100, Potenza, Italy.
| | - Raffaella Pascale
- Università Degli Studi Della Basilicata, Dipartimento di Scienze, Via Dell'Ateneo Lucano, 10-85100, Potenza, Italy.
| | - Antonia Nicolò
- Università Degli Studi Della Basilicata, Dipartimento di Scienze, Via Dell'Ateneo Lucano, 10-85100, Potenza, Italy.
| | - Vincenzo Brancaleone
- Università Degli Studi Della Basilicata, Dipartimento di Scienze, Via Dell'Ateneo Lucano, 10-85100, Potenza, Italy.
| | - Tommaso R I Cataldi
- Università Degli Studi di Bari Aldo Moro, Dipartimento di Chimica, Via E. Orabona, 4-70126, Bari, Italy.
| | - Giuseppe Martelli
- Università Degli Studi Della Basilicata, Dipartimento di Scienze, Via Dell'Ateneo Lucano, 10-85100, Potenza, Italy.
| | - Laura Scrano
- Università Degli Studi Della Basilicata, Dipartimento Delle Culture Europee e Del Mediterraneo: Arch., Ambiente, Patrimoni Culturali, Via Lanera, 20-75100, Matera, Italy.
| | - Giuliana Bianco
- Università Degli Studi Della Basilicata, Dipartimento di Scienze, Via Dell'Ateneo Lucano, 10-85100, Potenza, Italy.
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11
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Ahmed OS, Ladner Y, Bousquet C, Montels J, Dubský P, Philibert L, Perrin C. Direct salting-out assisted liquid–liquid extraction (SALLE) from human blood: Application for the analysis of tyrosine kinase inhibitors. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104791] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Analysis of silver-associated proteins in pathogen via combination of native SDS-PAGE, fluorescent staining, and inductively coupled plasma mass spectrometry. J Chromatogr A 2019; 1607:460393. [PMID: 31376982 DOI: 10.1016/j.chroma.2019.460393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/16/2019] [Accepted: 07/21/2019] [Indexed: 11/19/2022]
Abstract
Characterization of silver-associated proteins is important to elucidate underlined mechanisms of silver-containing materials against microbes. Gel electrophoresis based methods are the most popular and basic strategy for the analysis of biomolecules, i.e., proteins and nucleic acids. It solely provides molecular weights of analytes. Extending the method from molecular weight to elemental composition is highly desired when investigating metal-containing molecules. Herein, a gel electrophoresis based method combining native sodium dodecyl sulfate-polyacrylamide gel electrophoresis (native SDS-PAGE), fluorescent staining, and inductively coupled plasma mass spectrometry (ICP-MS) strategy was developed for separation and detection of silver-associated proteins. Two home-made silver-labeled proteins, carbonic anhydrase and ovalbumin, were used for validation of the strategy performance. Silver-associated proteins in Pseudomonas aeruginosa and Staphylococcus aureus treated with silver nanoparticles were further characterized by this method. Some well-known and new proteins were identified to associate to silver in both P. aeruginosa and S. aureus, demonstrating the feasibility of the developed strategy. In conclusion, the current study provides a convenient method for readily identification of silver-associated proteins in biological samples.
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13
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Kadar A, Peyre L, Wortham H, Doumenq P. A simple GC–MS method for the determination of diphenylamine, tolylfluanid propargite and phosalone in liver fractions. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1113:69-76. [DOI: 10.1016/j.jchromb.2019.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 02/18/2019] [Accepted: 03/05/2019] [Indexed: 10/27/2022]
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14
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Metabolomics in chronic kidney disease: Strategies for extended metabolome coverage. J Pharm Biomed Anal 2018; 161:313-325. [PMID: 30195171 DOI: 10.1016/j.jpba.2018.08.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/22/2018] [Accepted: 08/23/2018] [Indexed: 12/16/2022]
Abstract
Chronic kidney disease (CKD) is becoming a major public health issue as prevalence is increasing worldwide. It also represents a major challenge for the identification of new early biomarkers, understanding of biochemical mechanisms, patient monitoring and prognosis. Each metabolite contained in a biofluid or tissue may play a role as a signal or as a driver in the development or progression of the pathology. Therefore, metabolomics is a highly valuable approach in this clinical context. It aims to provide a representative picture of a biological system, making exhaustive metabolite coverage crucial. Two aspects can be considered: analytical and biological coverage. From an analytical point of view, monitoring all metabolites within one run is currently impossible. Multiple analytical techniques providing orthogonal information should be carried out in parallel for coverage improvement. The biological aspect of metabolome coverage can be enhanced by using multiple biofluids or tissues for in-depth biological investigation, as the analysis of a single sample type is generally insufficient for whole organism extrapolation. Hence, recording of signals from multiple sample types and different analytical platforms generates massive and complex datasets so that chemometric tools, including data fusion approaches and multi-block analysis, are key tools for extracting biological information and for discovery of relevant biomarkers. This review presents the recent developments in the field of metabolomic analysis, from sampling and analytical strategies to chemometric tools, dedicated to the generation and handling of multiple complementary metabolomic datasets enabling extended metabolite coverage to improve our biological knowledge of CKD.
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Deproteinization assessment using isotopically enriched compounds to trace the coprecipitation of low-molecular-weight selenium species with proteins. Anal Biochem 2017; 530:9-16. [PMID: 28476531 DOI: 10.1016/j.ab.2017.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 04/10/2017] [Accepted: 05/01/2017] [Indexed: 11/21/2022]
Abstract
Studies have shown that information related to the presence of low-molecular-weight metabolites is frequently lost after deproteinization of complex matrices, such as blood and plasma, during sample preparation. Therefore, the effect of several deproteinization reagents on low-molecular-weight selenium species has been compared by species-specific isotope labeling. Two isotopically enriched selenium tracers were used to mimic models of small inorganic anionic (77Se-selenite) and organic zwitterionic (76Se-selenomethionine) species. The results presented here show that the use of a methanol-acetonitrile-acetone (1:1:1 v/v/v) mixture provided approximately two times less tracer loss from plasma samples in comparison with the classic procedure using acetonitrile, which may not be optimal as it leads to important losses of low-molecular-weight selenium species. In addition, the possible interactions between selenium tracers and proteins were investigated, revealing that both coprecipitation phenomena and association with proteins were potentially responsible for selenite tracer losses during protein precipitation in blood samples. However, coprecipitation phenomena were found to be fully responsible for losses of both tracers observed in plasma samples and of the selenomethionine tracer in blood samples. This successfully applied strategy is anticipated to be useful for more extensive future studies in selenometabolomics.
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16
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Plasma protein binding monitoring of therapeutic drugs in patients using single set of hollow fiber centrifugal ultrafiltration. Bioanalysis 2017; 9:579-592. [PMID: 28355126 DOI: 10.4155/bio-2016-0257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: Plasma protein binding (PPB), as a significant influenced factor of pharmacokinetic and pharmacodynamic properties of a medicine, is a suitable index for therapeutic drug monitoring (TDM) strategies. A suitable measurement technique of PPB of patients is in urgent need and attracts many analysts’ attention. Results & methodology: In this study, a novel method was proposed to analyze free drug concentration and total drug concentration (Ct) successively in one unit with a sample. All RSDs were less than 3%. The absolute recovery of Ct ranged from 98.1 to 101.2%. Discussion & conclusion: It is extremely valuable to consider PPB as an important index for TDM, perfecting information of medication, reflecting the disease condition more comprehensively, providing assistance for doctors to adjust the dose regimen. The proposed technique, convenience, accuracy and without the influence of plasma condition, provides a feasible method to monitor PPB of various patients, facilitating the popularization of monitoring PPB in TDM.
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Sample Preparation Strategies for the Effective Quantitation of Hydrophilic Metabolites in Serum by Multi-Targeted HILIC-MS/MS. Metabolites 2017; 7:metabo7020013. [PMID: 28358315 PMCID: PMC5487984 DOI: 10.3390/metabo7020013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 02/25/2017] [Accepted: 03/23/2017] [Indexed: 01/03/2023] Open
Abstract
The effect of endogenous interferences of serum in multi-targeted metabolite profiling HILIC-MS/MS analysis was investigated by studying different sample preparation procedures. A modified QuEChERS dispersive SPE protocol, a HybridSPE protocol, and a combination of liquid extraction with protein precipitation were compared to a simple protein precipitation. Evaluation of extraction efficiency and sample clean-up was performed for all methods. SPE sorbent materials tested were found to retain hydrophilic analytes together with endogenous interferences, thus additional elution steps were needed. Liquid extraction was not shown to minimise matrix effects. In general, it was observed that a balance should be reached in terms of recovery, efficient clean-up, and sample treatment time when a wide range of metabolites are analysed. A quick step for removing phospholipids prior to the determination of hydrophilic endogenous metabolites is required, however, based on the results from the applied methods, further studies are needed to achieve high recoveries for all metabolites.
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Nishiumi S, Shima K, Azuma T, Yoshida M. Evaluation of a novel system for analyzing hydrophilic blood metabolites. J Biosci Bioeng 2017; 123:754-759. [PMID: 28291661 DOI: 10.1016/j.jbiosc.2017.01.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 01/20/2017] [Indexed: 01/12/2023]
Abstract
Metabolomics has recently been developed, and there have been a considerable number of metabolomics-based biomarker studies in the medical research field. Therefore, as a first step toward the practical use of metabolite biomarkers, a simple and quick sample preparation method involving metabolite extraction, metabolite measurement, and data analysis needs to be developed. In this study, we evaluated whether the use of simpler metabolite extraction methods would facilitate the stable analysis of hydrophilic blood metabolites during liquid chromatography/triple quadrupole mass spectrometry (LC/QqQMS)-based metabolome analysis. As a result, the anion and cation metabolites in plasma were stably analyzed via a methanol-based extraction procedure followed by ultrafiltration, and it was also confirmed that a lyophilization step was not necessary. When extraction was performed without a lyophilization step, approximately >50% and >80% of the detected metabolites had relative standard deviation values of <20% during LC/QqQMS-based anion and cation analyses, respectively. In addition, the plasma levels of l-valine, l-leucine, l-isoleucine, l-tyrosine, and l-phenylalanine were quantitatively measured using the corresponding stable isotopes; the SCLAM-2000, a fully automatic pre-treatment system for LC/MS that can be connected online to an LC/MS device; and an extraction procedure based on the simple procedure that we developed. Our findings suggest that simpler pretreatment procedures can be employed during LC/QqQMS-based metabolomics and might aid searches for metabolite biomarker candidates, the validation of metabolite biomarker candidates, and the practical use of metabolite biomarkers.
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Affiliation(s)
- Shin Nishiumi
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan
| | - Keisuke Shima
- Global Application Development Center, Analytical & Measuring Instruments Division, Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan
| | - Takeshi Azuma
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan
| | - Masaru Yoshida
- Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan; Division of Metabolomics Research, Department of Internal Related, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan; AMED-CREST, Japan Agency for Medical Research and Development, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan.
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Lee SG, Kim K, Vance TM, Perkins C, Provatas A, Wu S, Qureshi A, Cho E, Chun OK. Development of a comprehensive analytical method for furanocoumarins in grapefruit and their metabolites in plasma and urine using UPLC-MS/MS: a preliminary study. Int J Food Sci Nutr 2016; 67:881-7. [PMID: 27396405 DOI: 10.1080/09637486.2016.1207157] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
To develop a comprehensive analytical method for photoactive furanocoumarins, grapefruit (whole, flesh, peel and juice) was extracted using QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method. Seven furanocoumarins: bergaptol, psoralen, 8-methoxypsoralen, bergapten, 6',7'-dihydroxybergamottin (6',7'-DHB), epoxybergamottin and bergamottin were determined in grapefruit using UPLC-MS/MS. The concentrations of furanocoumarins in the plasma and urine of six healthy young adults before and after ingestion of grapefruit or grapefruit juice were also determined. Recovery rates of furanocoumarins by QuEChERS method from matrix spike sample and laboratory calibrate sample were 125.7 ± 25.4% and 105.7 ± 6.3%, respectively. Bergamottin and 6',7'-DHB were predominant compounds in grapefruit flesh, juice and plasma, while bergaptol and 6',7'-DHB were major compounds detected in the urine. The results demonstrated that bergamottin and 6',7'-DHB were metabolized to bergaptol. Overall, the analytical methods developed in the present study can be applied to the analysis of various furanocoumarins in plant sources and biological samples.
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Affiliation(s)
- Sang Gil Lee
- a Department of Nutritional Sciences , University of Connecticut , Storrs , CT , USA
| | - Kijoon Kim
- a Department of Nutritional Sciences , University of Connecticut , Storrs , CT , USA
| | - Terrence M Vance
- a Department of Nutritional Sciences , University of Connecticut , Storrs , CT , USA
| | - Christopher Perkins
- b Center for Environmental Sciences and Engineering , University of Connecticut Storrs , CT , USA
| | - Anthony Provatas
- b Center for Environmental Sciences and Engineering , University of Connecticut Storrs , CT , USA
| | - Shaowei Wu
- c Department of Dermatology , The Warren Alpert Medical School of Brown University , Providence , RI , USA ;,d Department of Environmental Health , Harvard T.H. Chan School of Public Health , Boston , MA , USA
| | - Abrar Qureshi
- c Department of Dermatology , The Warren Alpert Medical School of Brown University , Providence , RI , USA ;,e Department of Epidemiology , Brown University School of Public Health , Providence , RI , USA ;,f Channing Division of Network Medicine , Brigham and Women's Hospital , Boston , MA , USA
| | - Eunyoung Cho
- c Department of Dermatology , The Warren Alpert Medical School of Brown University , Providence , RI , USA ;,e Department of Epidemiology , Brown University School of Public Health , Providence , RI , USA ;,f Channing Division of Network Medicine , Brigham and Women's Hospital , Boston , MA , USA
| | - Ock K Chun
- a Department of Nutritional Sciences , University of Connecticut , Storrs , CT , USA
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20
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Ding X, Chen Y, Sahasranaman S, Shi Y, McKnight J, Dean B. A supported liquid extraction LC-MS/MS method for determination of concentrations of GDC-0425, a small molecule Checkpoint kinase 1 inhibitor, in human plasma. Biomed Chromatogr 2016; 30:1984-1991. [DOI: 10.1002/bmc.3775] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 01/04/2016] [Accepted: 05/27/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Xiao Ding
- Genentech; Drug Metabolism and Pharmacokinetics; 1 DNA Way South San Francisco CA USA
| | - Yuan Chen
- Genentech; Drug Metabolism and Pharmacokinetics; 1 DNA Way South San Francisco CA USA
| | - Srikumar Sahasranaman
- Genentech; Small Molecule Clinical Pharmacology; 1 DNA Way South San Francisco CA USA
| | - Yifan Shi
- Covance Laboratories; 3301 Kinsman Blvd. Madison WI USA
| | | | - Brian Dean
- Genentech; Drug Metabolism and Pharmacokinetics; 1 DNA Way South San Francisco CA USA
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21
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Quantification of 11 thyroid hormones and associated metabolites in blood using isotope-dilution liquid chromatography tandem mass spectrometry. Anal Bioanal Chem 2016; 408:5429-42. [DOI: 10.1007/s00216-016-9614-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 04/24/2016] [Accepted: 04/29/2016] [Indexed: 12/26/2022]
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22
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Hansen M, Luong X, Sedlak DL, Helbing CC, Hayes T. Quantification of 11 thyroid hormones and associated metabolites in blood using isotope-dilution liquid chromatography tandem mass spectrometry. Anal Bioanal Chem 2016. [DOI: 10.1007/s00216-016-9614-9 pubmed pmid: 27215639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
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23
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Periat A, Kohler I, Thomas A, Nicoli R, Boccard J, Veuthey JL, Schappler J, Guillarme D. Systematic evaluation of matrix effects in hydrophilic interaction chromatography versus reversed phase liquid chromatography coupled to mass spectrometry. J Chromatogr A 2016; 1439:42-53. [DOI: 10.1016/j.chroma.2015.09.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 08/18/2015] [Accepted: 09/11/2015] [Indexed: 01/18/2023]
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Abstract
BACKGROUND In early drug-discovery research, traditional techniques to analyze drug concentrations in tissues for bioanalytical needs include bead beaters and probe homogenization devices, but are not as effective for tough fibrous tissues. To prepare these tissues, the enzyme collagenase was used to digest the collagen fibers present in epithelial and connective tissue. RESULTS The benefits of tissue homogenization using a bead beater following collagenase treatment of samples, as opposed to using bead beating alone, was investigated. Matrix effect, recovery factor and stability with and without collagenase were assessed. CONCLUSION Little to no effects on the quality and reliability of collagenase treated samples were observed. This enzymatic approach is a feasible and effective tool for tissue homogenization and subsequent analysis by LC-MS/MS.
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25
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Zgair A, Wong JCM, Sabri A, Fischer PM, Barrett DA, Constantinescu CS, Gershkovich P. Development of a simple and sensitive HPLC-UV method for the simultaneous determination of cannabidiol and Δ(9)-tetrahydrocannabinol in rat plasma. J Pharm Biomed Anal 2015; 114:145-51. [PMID: 26048666 DOI: 10.1016/j.jpba.2015.05.019] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/11/2015] [Accepted: 05/17/2015] [Indexed: 10/23/2022]
Abstract
There has been increased interest in the medical use of cannabinoids in recent years, particularly in the predominant natural cannabinoids, cannabidiol (CBD) and Δ(9)-tetrahydrocannabinol (THC). The aim of the current study was to develop a sensitive and reliable method for the quantification of CBD and THC in rat plasma. A combination of protein precipitation using cold acetonitrile and liquid-liquid extraction using n-hexane was utilised to extract CBD and THC from rat plasma. Samples were then evaporated and reconstituted in acetonitrile and 30 μL was injected into an HPLC system. Separation was achieved using an ACE C18-PFP 150 mm × 4.6 mm, 3 μm column at 55 °C with isocratic elution using a mobile phase consisting of acetonitrile-water (62:38, v/v) at 1 mL/min for 20 min. Both cannabinoids, as well as the internal standard (4,4-dichlorodiphenyltrichloroethane, DDT) were detected at 220 nm. Our new method showed linearity in the range of 10-10,000 ng/mL and a lower limit of quantification (LLOQ) of 10 ng/mL for both cannabinoids, which is comparable to previously reported LC-MS/MS methods. Inter- and intra-day precision and accuracy were below 15% RSD and RE, respectively. To demonstrate the suitability of the method for in vivo studies in rats, the assay was applied to a preliminary pharmacokinetic study following IV bolus administration of 5 mg/kg CBD or THC. In conclusion, a simple, sensitive, and cost-efficient HPLC-UV method for the simultaneous determination of CBD and THC has been successfully developed, validated and applied to a pharmacokinetic study in rats.
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Affiliation(s)
- Atheer Zgair
- School of Pharmacy, University of Nottingham, Nottingham, UK; College of Pharmacy, University of Anbar, Anbar, Iraq
| | | | - Akmal Sabri
- School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Peter M Fischer
- School of Pharmacy, University of Nottingham, Nottingham, UK
| | - David A Barrett
- School of Pharmacy, University of Nottingham, Nottingham, UK
| | - Cris S Constantinescu
- Division of Clinical Neuroscience, University of Nottingham and Queen's Medical Centre, Nottingham, UK
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26
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Skov K, Hadrup N, Smedsgaard J, Frandsen H. LC–MS analysis of the plasma metabolome—A novel sample preparation strategy. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 978-979:83-8. [DOI: 10.1016/j.jchromb.2014.11.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 11/28/2014] [Accepted: 11/30/2014] [Indexed: 01/28/2023]
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27
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A cocktail approach for assessing the in vitro activity of human cytochrome P450s: An overview of current methodologies. J Pharm Biomed Anal 2014; 101:221-37. [DOI: 10.1016/j.jpba.2014.03.018] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 03/13/2014] [Indexed: 01/27/2023]
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28
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Sarafian MH, Gaudin M, Lewis MR, Martin FP, Holmes E, Nicholson JK, Dumas ME. Objective Set of Criteria for Optimization of Sample Preparation Procedures for Ultra-High Throughput Untargeted Blood Plasma Lipid Profiling by Ultra Performance Liquid Chromatography–Mass Spectrometry. Anal Chem 2014; 86:5766-74. [DOI: 10.1021/ac500317c] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Magali H. Sarafian
- Imperial College London, Section of Biomolecular
Medicine, Division of Computational Systems Medicine, Department of
Surgery and Cancer, Sir
Alexander Building, Exhibition Road, South
Kensington, London SW7
2AZ, U.K
| | - Mathieu Gaudin
- Imperial College London, Section of Biomolecular
Medicine, Division of Computational Systems Medicine, Department of
Surgery and Cancer, Sir
Alexander Building, Exhibition Road, South
Kensington, London SW7
2AZ, U.K
- Technologie Servier, 25 Rue Eugène
Vignat, 45000 Orléans, France
| | - Matthew R. Lewis
- Imperial College London, MRC NIHR National Phenome
Centre, Division of Computational Systems Medicine, Department of
Surgery and Cancer, IRDB
Building, Du Cane Road, London W12 0NN, U.K
| | | | - Elaine Holmes
- Imperial College London, Section of Biomolecular
Medicine, Division of Computational Systems Medicine, Department of
Surgery and Cancer, Sir
Alexander Building, Exhibition Road, South
Kensington, London SW7
2AZ, U.K
| | - Jeremy K. Nicholson
- Imperial College London, Section of Biomolecular
Medicine, Division of Computational Systems Medicine, Department of
Surgery and Cancer, Sir
Alexander Building, Exhibition Road, South
Kensington, London SW7
2AZ, U.K
- Imperial College London, MRC NIHR National Phenome
Centre, Division of Computational Systems Medicine, Department of
Surgery and Cancer, IRDB
Building, Du Cane Road, London W12 0NN, U.K
| | - Marc-Emmanuel Dumas
- Imperial College London, Section of Biomolecular
Medicine, Division of Computational Systems Medicine, Department of
Surgery and Cancer, Sir
Alexander Building, Exhibition Road, South
Kensington, London SW7
2AZ, U.K
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29
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Biological sample preparation: attempts on productivity increasing in bioanalysis. Bioanalysis 2014; 6:1691-710. [DOI: 10.4155/bio.14.118] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Sample preparation is an important step of any biomedical analysis. Development and validation of fast, reproducible and reliable sample preparation methods would be very helpful in increasing productivity. Except for a few direct injection methods, almost all biological samples should at least be diluted before any analysis. Sometimes dilution is not possible because of the low concentration of the target analyte in the sample, and alternative pretreatments, such as filtration, precipitation and sample clean up using different extraction methods, are needed. This review focuses on the recent achievements in the pretreatment of biological samples and investigates them in six categories (i.e., dilution, filtration/dialysis, precipitation, extraction [solid-phase extraction, liquid–liquid extraction], novel techniques [turbulent flow chromatography, immunoaffinity method, electromembrane extraction] and combined methods). Each category will be discussed according to its productivity rate and suitability for routine analysis, and the discussed methods will be compared according to the mentioned indices.
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30
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Stability of the proteasome inhibitor bortezomib in cell based assays determined by ultra-high performance liquid chromatography coupled to tandem mass spectrometry. J Chromatogr A 2014; 1345:128-38. [DOI: 10.1016/j.chroma.2014.04.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 01/24/2014] [Accepted: 04/09/2014] [Indexed: 01/07/2023]
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31
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Evaluation of triple stage mass spectrometry as a robust and accurate diagnostic tool for determination of free cordycepin in designer egg. Food Chem 2014; 150:213-9. [DOI: 10.1016/j.foodchem.2013.10.132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Revised: 09/30/2013] [Accepted: 10/26/2013] [Indexed: 10/26/2022]
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32
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Furey A, Moriarty M, Bane V, Kinsella B, Lehane M. Ion suppression; a critical review on causes, evaluation, prevention and applications. Talanta 2013; 115:104-22. [PMID: 24054567 DOI: 10.1016/j.talanta.2013.03.048] [Citation(s) in RCA: 302] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 03/17/2013] [Accepted: 03/20/2013] [Indexed: 11/30/2022]
Abstract
The consequences of matrix effects in mass spectrometry analysis are a major issue of concern to analytical chemists. The identification of any ion suppressing (or enhancing) agents caused by sample matrix, solvent or LC-MS system components should be quantified and measures should be taken to eliminate or reduce the problem. Taking account of ion suppression should form part of the optimisation and validation of any quantitative LC-MS method. For example the US Food and Drug Administration has included the evaluation of matrix effects in its "Guidance for Industry on Bioanalytical Method Validation" (F.D.A. Department of Health and Human Services, Guidance for industry on bioanalytical method validation, Fed. Regist. 66 (100) 2001). If ion suppression is not assessed and corrected in an analytical method, the sensitivity of the LC-MS method can be seriously undermined, and it is possible that the target analyte may be undetected even when using very sensitive instrumentation. Sample analysis may be further complicated in cases where there are large sample-to-sample matrix variations (e.g. blood samples from different people can sometimes vary in certain matrix components, shellfish tissue samples sourced from different regions where different phytoplankton food sources are present, etc) and therefore exhibit varying ion-suppression effects. Although it is widely agreed that there is no generic method to overcome ion suppression, the purpose of this review is to: provide an overview of how ion suppression occurs, outline the methodologies used to assess and quantify the impact of ion suppression, discuss the various corrective actions that have been used to eliminate ion suppression in sample analysis, that is to say the deployment of techniques that eliminate or reduce the components in the sample matrix that cause ion suppression. This review article aims to collect together the latest information on the causes of ion suppression in LC-MS analysis and to consider the efficacy of common approaches to eliminate or reduce the problem using relevant examples published in the literature.
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Affiliation(s)
- Ambrose Furey
- Mass Spectrometry Research Centre (MSRC), Department of Chemistry, Cork Institute of Technology, Cork, Ireland; Team Elucidate/Mass Spectrometry Centre for Proteomic and Biotoxin Research (PROTEOBIO), Department of Chemistry, Cork Institute of Technology, Cork, Ireland.
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Investigation of Matrix Effects on the Determination of Carbadox and Olaquindox in Feed by LC–MS/MS. Chromatographia 2013. [DOI: 10.1007/s10337-013-2444-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Alzweiri M, Watson DG, Parkinson JA. METABONOMICS AS A CLINICAL TOOL OF ANALYSIS: LC-MS APPROACHES. J LIQ CHROMATOGR R T 2013. [DOI: 10.1080/10826076.2011.644054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Muhammed Alzweiri
- a Department of Pharmaceutical Sciences , The University of Jordan , Amman , Jordan
| | - David G. Watson
- b Strathclyde Institute for Pharmaceutical and Biomedical Sciences , University of Strathclyde , Glasgow , U.K
| | - John A. Parkinson
- c WestCHEM, Department of Pure and Applied Chemistry , University of Strathclyde , Glasgow , U.K
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Kiss B, Bogdan C, Pop A, Loghin F. A rapid UPLC-MS/MS method for simultaneous determination of flunitrazepam, 7-aminoflunitrazepam, methadone and EDDP in human, rat and rabbit plasma. Talanta 2012; 99:649-59. [PMID: 22967607 DOI: 10.1016/j.talanta.2012.06.070] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 06/18/2012] [Accepted: 06/25/2012] [Indexed: 11/17/2022]
Abstract
A simple, high-throughput, sensitive LC-ESI-MS/MS method is presented for the simultaneous determination of methadone (MET), flunitrazepam (FNZ) and their major metabolites, EDDP (2-ethilidene-1,5-dimethyl-3,3-diphenylpyrrolidone) and 7-aminoflunitrazepam (7-AFNZ), respectively, in human, rat and rabbit plasma. The isolation of the selected compounds involved a liquid-liquid extraction with ethyl acetate at a basic pH. Good chromatographic separation was achieved on a HSS T3 column (1.8 μm particle size), with a 3 min gradient elution using a mixture of acetonitrile with 0.1% formic acid (solvent A) and 5mM ammonium acetate (solvent B) as the mobile phase. The tandem mass spectrometric detection was performed in multiple reaction monitoring (MRM) mode with ionization of the analytes in positive mode. The assay was fully validated according to current acceptance criteria for bioanalytical methods validation. It was proved to be linear in the range of 0.5-250 ng/mL, with adequate accuracy and precision over this range. Based on accuracy and CV% values the LOQ and ULOQ values were set at 0.509 ng/mL and 2036 ng/mL for MET, 0.520 ng/mL and 2080 ng/mL for EDDP, 0.524 ng/mL and 2096 ng/mL for FNZ and 0.528 ng/mL and 2114 ng/mL for 7-AFNZ, respectively. The method was tested for potential matrix effects, without observing significant ion suppression. The investigated compounds stability was examined in plasma at room temperature and after three freeze-thaw cycles and in the final extract when maintained at 4 °C in the autosampler. Potential stability issues were observed only for FNZ at room temperature. The method was successfully applied to quantify the selected compounds in human, rat and rabbit plasma samples, after exposure to FNZ or simultaneous exposure to FNZ and MET.
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Affiliation(s)
- Béla Kiss
- Department of Toxicology, Faculty of Pharmacy, University of Medicine and Pharmacy Iuliu Hatieganu, no. 6 Pasteur, RO-400349 Cluj-Napoca, Romania.
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Vecchione G, Casetta B, Chiapparino A, Bertolino A, Tomaiuolo M, Cappucci F, Gatta R, Margaglione M, Grandone E. A reliable and rapid tool for plasma quantification of 18 psychotropic drugs by ESI tandem mass spectrometry. J Pharm Biomed Anal 2012; 67-68:104-13. [PMID: 22608096 DOI: 10.1016/j.jpba.2012.04.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 04/16/2012] [Accepted: 04/17/2012] [Indexed: 11/15/2022]
Abstract
A simple liquid chromatographic tandem mass spectrometry (LC-MS/MS) method has been developed for simultaneous analysis of 17 basic and one acid psychotropic drugs in human plasma. The method relies on a protein precipitation step for sample preparation and offers high sensitivity, wide linearity without interferences from endogenous matrix components. Chromatography was run on a reversed-phase column with an acetonitrile-H₂O mixture. The quantification of target compounds was performed in multiple reaction monitoring (MRM) and by switching the ionization polarity within the analytical run. A further sensitivity increase was obtained by implementing the functionality "scheduled multiple reaction monitoring" (sMRM) offered by the recent version of the software package managing the instrument. The overall injection interval was less than 5.5 min. Regression coefficients of the calibration curves and limits of quantification (LOQ) showed a good coverage of over-therapeutic, therapeutic and sub-therapeutic ranges. Recovery rates, measured as percentage of recovery of spiked plasma samples, were ≥ 94%. Precision and accuracy data have been satisfactory for a therapeutic drug monitoring (TDM) service as for managing plasma samples from patients receiving psycho-pharmacological treatment.
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Affiliation(s)
- Gennaro Vecchione
- Atherosclerosis and Thrombosis Unit, I.R.C.C.S. "Casa Sollievo della Sofferenza", S. Giovanni Rotondo, Foggia, Italy
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37
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Sobhi HR, Vatansever B, Wortmann A, Grouzmann E, Rochat B. Generic approach for the sensitive absolute quantification of large undigested peptides in plasma using a particular liquid chromatography–mass spectrometry setup. J Chromatogr A 2011; 1218:8536-43. [DOI: 10.1016/j.chroma.2011.09.072] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Revised: 09/23/2011] [Accepted: 09/26/2011] [Indexed: 01/02/2023]
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38
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Abstract
The importance of sample preparation methods as the first stage in bioanalysis is described. In this article, the sample preparation concept and strategies will be discussed, along with the requirements for good sample preparation. The most widely used sample preparation methods in the pharmaceutical industry are presented; for example, the need for same-day rotation of results from large numbers of biological samples in pharmaceutical industry makes high throughput bioanalysis more essential. In this article, high-throughput sample preparation techniques are presented; examples are given of the extraction and concentration of analytes from biological matrices, including protein precipitation, solid-phase extraction, liquid–liquid extraction and microextraction-related techniques. Finally, the potential role of selective extraction methods, including molecular imprinted phases, is considered.
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Azzouz A, Souhail B, Ballesteros E. Determination of residual pharmaceuticals in edible animal tissues by continuous solid-phase extraction and gas chromatography–mass spectrometry. Talanta 2011; 84:820-8. [DOI: 10.1016/j.talanta.2011.02.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 01/31/2011] [Accepted: 02/14/2011] [Indexed: 10/18/2022]
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40
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Characterization and classification of matrix effects in biological samples analyses. J Chromatogr A 2010; 1217:4071-8. [DOI: 10.1016/j.chroma.2009.08.061] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2009] [Revised: 08/05/2009] [Accepted: 08/25/2009] [Indexed: 11/18/2022]
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41
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Álvarez-Sánchez B, Priego-Capote F, Castro MLD. Metabolomics analysis II. Preparation of biological samples prior to detection. Trends Analyt Chem 2010. [DOI: 10.1016/j.trac.2009.12.004] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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42
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Choong E, Rudaz S, Kottelat A, Guillarme D, Veuthey JL, Eap CB. Therapeutic drug monitoring of seven psychotropic drugs and four metabolites in human plasma by HPLC–MS. J Pharm Biomed Anal 2009; 50:1000-8. [DOI: 10.1016/j.jpba.2009.07.007] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2009] [Accepted: 07/05/2009] [Indexed: 12/15/2022]
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43
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Eggink M, Charret S, Wijtmans M, Lingeman H, Kool J, Niessen WMA, Irth H. Development of an on-line weak-cation exchange liquid chromatography-tandem mass spectrometric method for screening aldehyde products in biological matrices. J Chromatogr B Analyt Technol Biomed Life Sci 2009; 877:3937-45. [PMID: 19880357 DOI: 10.1016/j.jchromb.2009.09.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/27/2009] [Accepted: 09/28/2009] [Indexed: 10/20/2022]
Abstract
This paper focuses on the development and optimization of an on-line weak-cation exchange SPE (WCXE) coupled to gradient HPLC with tandem MS detection. The system enables the selective purification and re-concentration of the in-vial derivatized aldehydes from plasma and urine samples. Aldehydes are important as biomarkers for oxidative stress. Using a derivatization cocktail consisting of 4-(2-(trimethylammonio)ethoxy)benzenaminium dibromide (4-APC) and NaBH3CN in the screening and detection of known and unknown aldehyde biomarkers, one can take advantage of the specific fragmentation characteristics of this derivatization reagent in MS/MS. The WCXE column gives the advantages of direct injection of the sample after protein precipitation and centrifugation into the WCXE-LC-MS/MS system. Injection volumes up to 50 microl can be injected without overloading the WCX column. Detection limits of 0.5 nM can be reached for the detection of the derivatized aldehydes. The system is robust with low intra-/inter-day variation in retention time and peak area. An in vitro model shows how derivatized aldehydes in human and rat plasma are detected. Finally, plasma treated with radical inducer shows elevated aldehyde species compared to untreated plasma.
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Affiliation(s)
- Mark Eggink
- VU University Amsterdam, Faculty of Science, Section of Analytical Chemistry and Applied Spectroscopy, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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Cai X, Zou L, Dong J, Zhao L, Wang Y, Xu Q, Xue X, Zhang X, Liang X. Analysis of highly polar metabolites in human plasma by ultra-performance hydrophilic interaction liquid chromatography coupled with quadrupole-time of flight mass spectrometry. Anal Chim Acta 2009; 650:10-5. [DOI: 10.1016/j.aca.2009.01.054] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Revised: 01/20/2009] [Accepted: 01/27/2009] [Indexed: 10/21/2022]
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45
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Li H, Lee JR, Nguyen DQA, Kim SB, Seo YG, Chang YK, Hong SK, Moon MH, Chung IY, Kim CJ. Quantitative analysis of valiolamine through pre-column derivatization with phenylisocyanate using high-performance liquid chromatography with UV detection: Selection of reagent, identification of derivative and optimization of derivatization conditions. J Pharm Biomed Anal 2009; 49:957-63. [DOI: 10.1016/j.jpba.2009.02.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2008] [Revised: 02/13/2009] [Accepted: 02/14/2009] [Indexed: 11/28/2022]
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46
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Hendriks G. Theoretical models in LC based bioanalytical method development. J Pharm Biomed Anal 2009; 49:1-10. [DOI: 10.1016/j.jpba.2008.09.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Accepted: 09/19/2008] [Indexed: 10/21/2022]
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47
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Liu M, Yan W, Lin JM, Hashi Y, Liu LB, Wei Y. On-line liquid chromatography–mass spectrometry with dilution line to achieve large volume urine injection for the improvement of sensitivity. J Chromatogr A 2008; 1198-1199:87-94. [DOI: 10.1016/j.chroma.2008.05.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2007] [Revised: 04/01/2008] [Accepted: 05/06/2008] [Indexed: 10/22/2022]
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48
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Rochat B, Fayet A, Widmer N, Lahrichi SL, Pesse B, Décosterd LA, Biollaz J. Imatinib metabolite profiling in parallel to imatinib quantification in plasma of treated patients using liquid chromatography-mass spectrometry. JOURNAL OF MASS SPECTROMETRY : JMS 2008; 43:736-752. [PMID: 18286663 DOI: 10.1002/jms.1369] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Besides affecting the systemic bioavailability of the parent drug, drug metabolizing enzymes (DMEs) may produce bioactive and/or toxic metabolites of clinical interest. We have investigated the capability to analyze simultaneously the parent drug and newly identified metabolites in patients' plasma by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The anticancer drug, imatinib, was chosen as a model drug because it has opened a new area in cancer therapy and is given orally and chronically. In addition, resistance and rare but sometimes severe side effects have been reported with this therapy. The quantification of imatinib and the profiling of its metabolites in plasma were established following three steps: (1) set-up of a generic sample extraction and LC-MS/MS conditions, (2) metabolite identification by LC-MS/MS using either in vitro incubations performed with human liver microsomes (HLMs) or patient plasma samples, (3) the simultaneous determination of plasma levels of imatinib and 14 metabolites in the plasma samples of 38 patients. Partial or cross method validation has been done and revealed that precise determinations of metabolite levels can be performed whereas pure standards are not available. Preliminary results indicate that the disposition of imatinib and its metabolites is related to interindividual variables and that outlier metabolite profiles can be revealed. This article underscores that, in addition to usual therapeutic drug monitoring (TDM), LC-MS/MS methods can simultaneously record a complete drug metabolic profile enabling various correlation studies of clinical interest.
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Affiliation(s)
- Bertrand Rochat
- Quantitative Mass Spectrometry Facility, Centre Hospitalier Universitaire Vaudois (CHUV), 1011 Lausanne, Switzerland.
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49
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Bugey A, Staub C. Application of monolithic supports to online extraction and LC-MS analysis of benzodiazepines in whole blood samples. J Sep Sci 2007; 30:2967-78. [PMID: 17893846 DOI: 10.1002/jssc.200700141] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A column-switching (CS) LC-MS method allowing high-speed determination of benzodiazepines (BZDs) in whole blood is presented. After protein precipitation with ACN followed by evaporation and reconstitution with the loading mobile phase, the online sample clean-up was carried out using a CS device. Two extractive precolumns were evaluated: a conventional restricted access material (RAM) sorbent and a monolithic silica support. Separation was achieved using a Chromolith Performance RP-18e (100 mmx4.6 mm id) monolithic silica column, and detection was performed by atmospheric pressure chemical ionization (APCI) MS. The method with both supports has been fully validated according to an accuracy profile approach. Finally, the monolithic silica column, demonstrating better validation data and a higher robustness than the RAM sorbent, was used for the analysis of several real forensic cases.
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Affiliation(s)
- Aurélie Bugey
- Institute of Forensic Medicine, University of Geneva, Geneva, Switzerland
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50
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Shakleya DM, Jansson LM, Huestis MA. Validation of a LC–APCI-MS/MS method for quantification of methadone, 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine (EDDP) and 2-ethyl-5-methyl-3,3-diphenylpyraline (EMDP) in infant plasma following protein precipitation. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 856:267-72. [PMID: 17602899 DOI: 10.1016/j.jchromb.2007.06.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Revised: 05/24/2007] [Accepted: 06/12/2007] [Indexed: 11/23/2022]
Abstract
A validated, quantitative LC-APCI-MS/MS method for methadone, EDDP and EMDP in 200-microL plasma is presented. Specimen preparation was limited to protein precipitation and centrifugation. Chromatographic separation was achieved on a Synergi Hydro-RP 80A (50 mm x 2.0 m, 4 microm) column with gradient elution. The assay was linear from 1 to 500 ng/mL, with intra- and inter-assay accuracy >or=87.5% and intra- and inter-assay precision <13.4% R.S.D. and recovery >or=87.5% for all analytes at 40 ng/mL. This analytical method is suitable for the accurate and precise determination of methadone and metabolites in human plasma specimens.
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Affiliation(s)
- Diaa M Shakleya
- Chemistry and Drug Metabolism, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, 5500 Nathan Shock Drive, Baltimore, MD 21224, United States
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