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Banda CG, Tarning J, Barnes KI. Use of population pharmacokinetic-pharmacodynamic modelling to inform antimalarial dose optimization in infants. Br J Clin Pharmacol 2024. [PMID: 38858224 DOI: 10.1111/bcp.16132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 03/21/2024] [Accepted: 05/18/2024] [Indexed: 06/12/2024] Open
Abstract
Infants bear a significant malaria burden but are usually excluded from participating in early dose optimization studies that inform dosing regimens of antimalarial therapy. Unlike older children, infants' exclusion from early-phase trials has resulted in limited evidence to guide accurate dosing of antimalarial treatment for uncomplicated malaria or malaria-preventive treatment in this vulnerable population. Subsequently, doses used in infants are often extrapolated from older children or adults, with the potential for under- or overdosing. Population pharmacokinetic-pharmacodynamic (PK-PD) modelling, a quantitative methodology that applies mathematical and statistical techniques, can aid the design of clinical studies in infants that collect sparse pharmacokinetic data as well as support the analysis of such data to derive optimized antimalarial dosing in this complex and at-risk yet understudied subpopulation. In this review, we reflect on what PK-PD modelling can do in programmatic settings of most malaria-endemic areas and how it can be used to inform antimalarial dose optimization for preventive and curative treatment of uncomplicated malaria in infants. We outline key developmental physiological changes that affect drug exposure in early life, the challenges of conducting dose optimization studies in infants, and examples of how PK-PD modelling has previously informed antimalarial dose optimization in this subgroup. Additionally, we discuss the limitations and gaps of PK-PD modelling when used for dose optimization in infants. To utilize modelling well, there is a need to generate useful, sparse, PK and PD data in this subpopulation to inform antimalarial optimal dosing in infancy.
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Affiliation(s)
- Clifford G Banda
- Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
- Kamuzu University of Health Sciences (formerly College of Medicine and Kamuzu College of Nursing, University of Malawi), Blantyre, Malawi
| | - Joel Tarning
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Mahidol Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Karen I Barnes
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
- WorldWide Antimalarial Resistance Network (WWARN), Pharmacology Scientific Group, University of Cape Town, Cape Town, South Africa
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2
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Qian J, Wang M, Zhang M, Feng R, Zhang J, Ye C, Wang B, Cui L. Development and application of immunoassays for rapid quality control of the antimalarial drug combination artesunate-mefloquine. J Pharm Biomed Anal 2022; 207:114342. [PMID: 34634530 DOI: 10.1016/j.jpba.2021.114342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 08/09/2021] [Accepted: 08/21/2021] [Indexed: 10/20/2022]
Abstract
Artesunate-mefloquine is one of the commonly-used artemisinin-based combination therapies (ACTs). Given the significance of drug quality in the management of malaria cases, the objective of this study was to develop antibody-based assays as the point-of-care (POC) tests for monitoring the quality of this ACT. Using mefloquine conjugated to a carrier protein as the immunogen, we selected a specific monoclonal antibody (mAb) against mefloquine with no cross-reactivity to other antimalarial drugs. Using this mAb, we developed a direct competitive enzyme-linked immunosorbent assay (dcELISA) and a lateral flow immunoassay (LFIA) to measure the mefloquine contents. The dcELISA for mefloquine showed a 50% inhibitory concentration (IC50) and a working range of 2.79 ng/mL and 0.58-16.37 ng/mL, respectively. With the aid of a portable optical scanner, the LFIA had a working range of 0.15-2.67 µg/mL for mefloquine. When used to measure mefloquine contents in commercial drugs, the dcELISA and LFIA results were compatible with those determined using high-performance liquid chromatography. Using the same LFIA format, we developed a combination LFIA, which correctly estimated the artesunate and mefloquine contents in commercial ACTs. Therefore, both LFIAs could be used as POC devices for rapid quality control of artesunate and mefloquine in ACTs.
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Affiliation(s)
- Jingqi Qian
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Mian Wang
- College of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Man Zhang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Rui Feng
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Jiaqi Zhang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Chencheng Ye
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Baomin Wang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, China.
| | - Liwang Cui
- Department of Internal Medicine, Morsani College of Medicine, University of South Florida, 3720 Spectrum Boulevard, Suite 304, Tampa, FL 33612, USA.
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3
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Technological advancement in dry blood matrix microsampling and its clinical relevance in quantitative drug analysis. Bioanalysis 2020; 12:1483-1501. [DOI: 10.4155/bio-2020-0211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
In the past few decades, dried blood matrix biosampling has witnessed a marvelous interest among the researcher due to its user-friendly operation during blood sampling in preclinical and clinical applications. It also complies with the basic 3Rs (reduce, reuse and recycle) philosophy. Because of comparative simplicity, a huge number of researchers are paying attention to its technological advancements for widespread application in the bioanalysis and diagnosis arena. In this review, we have explained different approaches to be considered during dried blood matrix based microsampling including their clinical relevance in therapeutic drug monitoring. We have also discussed various strategies for avoiding and minimizing major unwanted analytical interferences associated with this technique during drug quantification. Further, various recent technological advancement in microsampling devices has been discussed correlating their clinical applications.
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Izes AM, Kimble B, Norris JM, Govendir M. In vitro hepatic metabolism of mefloquine using microsomes from cats, dogs and the common brush-tailed possum (Trichosurus vulpecula). PLoS One 2020; 15:e0230975. [PMID: 32287278 PMCID: PMC7156057 DOI: 10.1371/journal.pone.0230975] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 03/12/2020] [Indexed: 01/24/2023] Open
Abstract
Feline infectious peritonitis (FIP) is a systemic, fatal, viral-induced, immune-mediated disease of cats caused by feline infectious peritonitis virus (FIPV). Mefloquine, a human anti-malarial agent, has been shown to inhibit FIPV in vitro. As a first step to evaluate its efficacy and safety profile as a potential FIP treatment for cats, mefloquine underwent incubation in feline, canine and common brush-tailed possum microsomes and phase I metabolism cofactors to determine its rate of phase I depletion. Tramadol was used as a phase I positive control as it undergoes this reaction in both dogs and cats. Using the substrate depletion method, the in vitro intrinsic clearance (mean ± S.D.) of mefloquine by pooled feline and common brush-tailed possum microsomes was 4.5 ± 0.35 and 18.25 ± 3.18 μL/min/mg protein, respectively. However, phase I intrinsic clearance was too slow to determine with canine microsomes. Liquid chromatography-mass spectrometry (LC-MS) identified carboxymefloquine in samples generated by feline microsomes as well as negative controls, suggesting some mefloquine instability. Mefloquine also underwent incubation with feline, canine and common brush-tailed possum microsomes and phase II glucuronidative metabolism cofactors. O-desmethyltramadol (ODMT or M1) was used as a positive control as it undergoes a phase II glucuronidation reaction in these species. The rates of phase II mefloquine depletion by microsomes by all three species were too slow to estimate. Therefore mefloquine likely undergoes phase I hepatic metabolism catalysed by feline and common brush-tailed possum microsomes but not phase II glucuronidative metabolism in all three species and mefloquine is not likely to have delayed elimination in cats with clinically normal, hepatic function.
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Affiliation(s)
- Aaron Michael Izes
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
| | - Benjamin Kimble
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
| | - Jacqueline Marie Norris
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
| | - Merran Govendir
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
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Ilisz I, Bajtai A, Péter A, Lindner W. Cinchona Alkaloid-Based Zwitterionic Chiral Stationary Phases Applied for Liquid Chromatographic Enantiomer Separations: An Overview. Methods Mol Biol 2019; 1985:251-277. [PMID: 31069739 DOI: 10.1007/978-1-4939-9438-0_14] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
For the early 2000s, chromatographic methods applying chiral stationary phases (CSPs) became the most effective techniques for the resolution of chiral compounds on both analytical and preparative scales. High-performance liquid chromatography (HPLC) employing various types of chiral selectors covalently bonded to silica-based supports offers a state-of-the-art methodology for "chiral analysis." Although a large number of CSPs are available nowadays, the design and development of new "chiral columns" are still needed since it is obvious that in practice one needs a good portfolio of different columns to face the challenging task of enantiomeric resolutions. The development of the unique chiral anion, cation, and zwitterion exchangers achieved by Lindner and his partners serves as an expansion of the range of the efficiently applicable CSPs.In this context this overview chapter discusses and summarizes direct enantiomer separations of chiral acids and ampholytes applying zwitterionic ion exchangers derived from Cinchona alkaloids. Our aim is to provide comprehensive information on practical solutions with focus on the molecular recognition and methodological variables.
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Affiliation(s)
- István Ilisz
- Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary.
| | - Attila Bajtai
- Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary
| | - Antal Péter
- Institute of Pharmaceutical Analysis, University of Szeged, Szeged, Hungary
| | - Wolfgang Lindner
- Department of Analytical Chemistry, University of Vienna, Vienna, Austria
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Ilisz I, Bajtai A, Lindner W, Péter A. Liquid chromatographic enantiomer separations applying chiral ion-exchangers based on Cinchona alkaloids. J Pharm Biomed Anal 2018; 159:127-152. [PMID: 29980014 DOI: 10.1016/j.jpba.2018.06.045] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 06/22/2018] [Accepted: 06/23/2018] [Indexed: 12/11/2022]
Abstract
As the understanding of the various biological actions of compounds with different stereochemistry has grown, the necessity to develop methods for the analytical qualification and quantification of chiral products has become particularly important. The last quarter of the century has seen a vast growth of diverse chiral technologies, including stereocontrolled synthesis and enantioselective separation and analysis concepts. By the introduction of covalently bonded silica-based chiral stationary phases (CSPs), the so-called direct liquid chromatographic (LC) methods of enantiomer separation became the state-of-the-art methodology. Although a large number of CSPs is available nowadays, the design and development of new chiral selectors and CSPs are still needed since it is obvious that in practice one needs a good portfolio of different CSPs and focused "chiral columns" to tackle the challenging tasks. This review discusses and summarizes direct enantiomer separations of chiral acids and ampholytes applying anionic and zwitterionic ion-exchangers derived from Cinchona alkaloids with emphasis on literature data published in the last 10 years. Our aim is to provide an overview of practical solutions, while focusing on the integration of molecular recognition and methodological variables.
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Affiliation(s)
- István Ilisz
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; Institute of Pharmaceutical Analysis, University of Szeged, Somogyi utca 4, H-6720 Szeged, Hungary.
| | - Attila Bajtai
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Wolfgang Lindner
- Department of Analytical Chemistry, University of Vienna, Währinger Strasse 83, 1090 Vienna, Austria
| | - Antal Péter
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
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7
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Gallay J, Prod'hom S, Mercier T, Bardinet C, Spaggiari D, Pothin E, Buclin T, Genton B, Decosterd LA. LC-MS/MS method for the simultaneous analysis of seven antimalarials and two active metabolites in dried blood spots for applications in field trials: Analytical and clinical validation. J Pharm Biomed Anal 2018; 154:263-277. [PMID: 29579633 DOI: 10.1016/j.jpba.2018.01.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 02/04/2023]
Abstract
In epidemiological studies, antimalarials measurements in blood represent the best available marker of drugs exposure at population level, an important driver for the emergence of drug resistance. We have developed a liquid chromatography-tandem mass spectrometry method (LC-MS/MS) for the simultaneous quantification of 7 frequently used antimalarials (amodiaquine, chloroquine, quinine, sulfadoxine, pyrimethamine, mefloquine, lumefantrine) and 2 active metabolites (N-desethyl-amodiaquine, desbutyl-lumefantrine) in 10-μl dried blood spots (DBS). This sampling approach is suitable for field studies wherein blood samples processing, transportation and storage are problematic. Sample preparation included extraction from a 3 mm-disk punched out of the DBS with 100-μl of methanol + 1% formic acid containing deuterated internal standards for all drugs. Good performances were achieved in terms of trueness (-12.1 to +11.1%), precision (1.4-15.0%) and sensitivity, with lower limits of quantification comprised between 2 ng/ml (sulfadoxine) and 20 ng/ml (chloroquine, quinine, pyrimethamine, mefloquine, lumefantrine and desbutyl-lumefantrine). All analytes were stable in DBS kept for 24 h at room temperature and at 37 °C. The developed assay was applied within the frame of a pharmacokinetic study including 16 healthy volunteers who received a single dose of artemether-lumefantrine. Lumefantrine concentrations in plasma and in DBS were highly correlated (R = 0.97) at all time points, confirming the assumption that lumefantrine concentrations determined in DBS confidently reflect blood concentrations. The blood/plasma ratio of 0.56 obtained using the Bland-Altman approach (and corresponding to the slope of the linear regression) is in line with very low penetration of lumefantrine into red blood cells. This sensitive multiplex LC-MS/MS assay enabling the simultaneous analysis of antimalarials in DBS is suitable for epidemiological studies in field conditions.
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Affiliation(s)
- Joanna Gallay
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland; Service and Laboratory of Clinical Pharmacology, University Hospital, Lausanne, Switzerland
| | - Sylvain Prod'hom
- Service and Laboratory of Clinical Pharmacology, University Hospital, Lausanne, Switzerland
| | - Thomas Mercier
- Service and Laboratory of Clinical Pharmacology, University Hospital, Lausanne, Switzerland
| | - Carine Bardinet
- Service and Laboratory of Clinical Pharmacology, University Hospital, Lausanne, Switzerland
| | - Dany Spaggiari
- Service and Laboratory of Clinical Pharmacology, University Hospital, Lausanne, Switzerland
| | - Emilie Pothin
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland
| | - Thierry Buclin
- Service and Laboratory of Clinical Pharmacology, University Hospital, Lausanne, Switzerland
| | - Blaise Genton
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland; University of Basel, Basel, Switzerland; Division of Infectious Diseases and Department of Community Medicine, University Hospital, Lausanne, Switzerland
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8
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Exploring the enantiorecognition mechanism of Cinchona
alkaloid-based zwitterionic chiral stationary phases and the basic trans
-paroxetine enantiomers. J Sep Sci 2017; 41:1199-1207. [DOI: 10.1002/jssc.201701068] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/06/2017] [Accepted: 11/09/2017] [Indexed: 12/30/2022]
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9
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Ali I, Suhail M, Asnin L. Chiral separation of quinolones by liquid chromatography and capillary electrophoresis. J Sep Sci 2017; 40:2863-2882. [PMID: 28510993 DOI: 10.1002/jssc.201700200] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/02/2017] [Accepted: 05/02/2017] [Indexed: 12/29/2022]
Abstract
The quinolones are derivatives of oxoquinolines and mostly known for their antibacterial and antiviral activities. Many quinolones are chiral compounds having asymmetric centers and important due to their enantioselective biological activities. In order to study the biological activities of quinolone enantiomers, to control the manufacturing of homochiral drugs and to prepare necessary quantities of pure enantiomers for preclinical or clinical trials, respective chiral separation methods are urgently needed. In this context, the present review discusses chromatographic and electrophoretic methods for the enantioseparation of chiral quinolones and provides some useful information on their physical and pharmaceutical properties. The drawbacks of currently used techniques are revealed and ways to overcome them are outlined. Moreover, recommendations for an optimal choice of a separation protocol are given.
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Affiliation(s)
- Imran Ali
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, India
| | - Mohd Suhail
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, India
| | - Leonid Asnin
- Perm National Research Polytechnic University, Perm, Russia
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10
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Enantioseparation of Chiral Sulfoxides on Amylose-Based Columns: Comparison of Normal Phase Liquid Chromatography and Supercritical Fluid Chromatography. Chromatographia 2017. [DOI: 10.1007/s10337-016-3234-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Al‐Massaedh “AA, Schmidt M, Pyell U, Reinscheid UM. Elucidation of the Enantiodiscrimination Properties of a Nonracemic Chiral Alignment Medium through Gel-based Capillary Electrochromatography: Separation of the Mefloquine Stereoisomers. ChemistryOpen 2016; 5:455-459. [PMID: 27777838 PMCID: PMC5062011 DOI: 10.1002/open.201600085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Indexed: 11/07/2022] Open
Abstract
Enantiodiscrimination and enantioseparation are two highly important processes in chemistry, often performed by using NMR spectroscopy and chromatography. For a better understanding of the mechanistic details, the same system should be studied by both methods. In addition, isotropic and anisotropic NMR parameters should be obtained, the latter using alignment media so that residual dipolar couplings and chemical-shift anisotropies can be measured. Consequently, a chiral alignment medium was used for the first time in chiral gel-based capillary electrochromatography with the four stereoisomers of the antimalaria drug mefloquine as test compounds. Chromatographic data verify that enantiodiscrimination obtained with this alignment gel is caused by differences in the equilibrium constants related to associate formation. Hence, the chromatographic separation provides physicochemical data that form a basis for the understanding and optimization of alignment processes, and vice versa.
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Affiliation(s)
- “Ayat Allah” Al‐Massaedh
- Department of ChemistryUniversity of MarburgHans-Meerwein-Straße35032MarburgGermany
- Department of ChemistryFaculty of ScienceAl al-Bayt University25113MafraqJordan
| | - Manuel Schmidt
- Department of NMR-based Structural BiologyMax-Planck-Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
| | - Ute Pyell
- Department of ChemistryUniversity of MarburgHans-Meerwein-Straße35032MarburgGermany
| | - Uwe M. Reinscheid
- Department of NMR-based Structural BiologyMax-Planck-Institute for Biophysical ChemistryAm Fassberg 1137077GöttingenGermany
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12
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Antunes MV, Charão MF, Linden R. Dried blood spots analysis with mass spectrometry: Potentials and pitfalls in therapeutic drug monitoring. Clin Biochem 2016; 49:1035-46. [PMID: 27179588 DOI: 10.1016/j.clinbiochem.2016.05.004] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 05/05/2016] [Accepted: 05/08/2016] [Indexed: 01/13/2023]
Abstract
Therapeutic drug monitoring (TDM) relays in the availability of specialized laboratory assays, usually available in reference centers that are not accessible to all patients. In this context, there is a growing interest in the use of dried blood spot (DBS) sampling, usually obtained from finger pricks, which allows simple and cost-effective logistics in many settings, particularly in Developing Countries. The use of DBS assays to estimate plasma concentrations is highly dependent on the hematocrit of the blood, as well as the particular characteristics of the measured analyte. DBS assays require specific validation assays, most of them are related to hematocrit effects. In the present manuscript, the application of mass spectrometric assays for determination of drugs for TDM purposes in the last ten years is reviewed, as well as the particular validation assays for new DBS methods.
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Affiliation(s)
- Marina Venzon Antunes
- Toxicological Analysis Laboratory, Instituto de Ciências da Saúde, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Mariele Feiffer Charão
- Toxicological Analysis Laboratory, Instituto de Ciências da Saúde, Universidade Feevale, Novo Hamburgo, RS, Brazil
| | - Rafael Linden
- Toxicological Analysis Laboratory, Instituto de Ciências da Saúde, Universidade Feevale, Novo Hamburgo, RS, Brazil.
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13
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Wolrab D, Frühauf P, Moulisová A, Kuchař M, Gerner C, Lindner W, Kohout M. Chiral separation of new designer drugs (Cathinones) on chiral ion-exchange type stationary phases. J Pharm Biomed Anal 2016; 120:306-15. [DOI: 10.1016/j.jpba.2015.12.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 11/26/2022]
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14
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Shen Z, Lv C, Zeng S. Significance and challenges of stereoselectivity assessing methods in drug metabolism. J Pharm Anal 2016; 6:1-10. [PMID: 29403956 PMCID: PMC5762452 DOI: 10.1016/j.jpha.2015.12.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 12/21/2015] [Accepted: 12/21/2015] [Indexed: 12/14/2022] Open
Abstract
Stereoselectivity in drug metabolism can not only influence the pharmacological activities, tolerability, safety, and bioavailability of drugs directly, but also cause different kinds of drug-drug interactions. Thus, assessing stereoselectivity in drug metabolism is of great significance for pharmaceutical research and development (R&D) and rational use in clinic. Although there are various methods available for assessing stereoselectivity in drug metabolism, many of them have shortcomings. The indirect method of chromatographic methods can only be applicable to specific samples with functional groups to be derivatized or form complex with a chiral selector, while the direct method achieved by chiral stationary phases (CSPs) is expensive. As a detector of chromatographic methods, mass spectrometry (MS) is highly sensitive and specific, whereas the matrix interference is still a challenge to overcome. In addition, the use of nuclear magnetic resonance (NMR) and immunoassay in chiral analysis are worth noting. This review presents several typical examples of drug stereoselective metabolism and provides a literature-based evaluation on current chiral analytical techniques to show the significance and challenges of stereoselectivity assessing methods in drug metabolism.
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Affiliation(s)
- Zhuowei Shen
- Institute of Drug Metabolism and Pharmaceutical Analysis, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Chuang Lv
- Biogen Idec, Cambridge, MA 02142, USA
| | - Su Zeng
- Institute of Drug Metabolism and Pharmaceutical Analysis, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
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15
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Wilhelm AJ, den Burger JCG, Swart EL. Therapeutic drug monitoring by dried blood spot: progress to date and future directions. Clin Pharmacokinet 2014; 53:961-73. [PMID: 25204403 PMCID: PMC4213377 DOI: 10.1007/s40262-014-0177-7] [Citation(s) in RCA: 234] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This article discusses dried blood spot (DBS) sampling in therapeutic drug monitoring (TDM). The most important advantages of DBS sampling in TDM are the minimally invasive procedure of a finger prick (home sampling), the small volume (children), and the stability of the analyte. Many assays in DBS have been reported in the literature over the previous 5 years. These assays and their analytical techniques are reviewed here. Factors that may influence the accuracy and reproducibility of DBS methods are also discussed. Important issues are the correlation with plasma/serum concentrations and the influence of hematocrit on spot size and recovery. The different substrate materials are considered. DBS sampling can be a valid alternative to conventional venous sampling. However, patient correlation studies are indispensable to prove this. Promising developments are dried plasma spots using membrane and hematocrit correction using the potassium concentration.
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Affiliation(s)
- Abraham J Wilhelm
- Department of Clinical Pharmacology and Pharmacy, VU University Medical Center, de Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands,
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16
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Heinkele G, Geditz MCK, Ganchev B, Kerb R, Hofmann U, Mürdter TE. A new [2H]-labelled α-trichloroimidate glucuronic ester for the synthesis of deuterated drug conjugates. J Labelled Comp Radiopharm 2014; 57:699-703. [PMID: 25339577 DOI: 10.1002/jlcr.3243] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 08/15/2014] [Accepted: 09/26/2014] [Indexed: 11/10/2022]
Abstract
A new reaction pathway for the synthesis of a [(2)H]-labelled trichloroacetimidate precursor for the preparation of glucuronides is described. Therewith, stable isotope-labelled drug glucuronides become accessible on a preparative scale, which can further be used as internal standards for quantitative analysis.
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Affiliation(s)
- Georg Heinkele
- Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstrasse 112, 70376 Stuttgart, Germany
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17
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Procedures and practices for the validation of bioanalytical methods using dried blood spots: a review. Bioanalysis 2014; 6:2481-514. [DOI: 10.4155/bio.14.185] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Dried blood spot (DBS) sampling, the collection of whole blood samples on paper, is an emerging technique used for bioanalytical methods. Several analytical challenges, such as possible effects of spotting volume, hematocrit and spot inhomogeneity are identified for these methods, however, no regulatory-based guidelines for the specific validation of DBS-based assays are available hitherto. To date, 68 validation reports concerning methods for the quantitative determination of drugs in human DBS could be traced in the literature, with large differences in the extensiveness of the reported validations. This review aims to present an overview of these published validations. Additionally, the different challenges of DBS-based assays are discussed and recommendations on how to perform validation tests addressing these challenges are provided.
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Liquid chromatographic enantiomer separation with special focus on zwitterionic chiral ion-exchangers. Anal Bioanal Chem 2014; 406:6095-103. [DOI: 10.1007/s00216-014-7930-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 05/25/2014] [Accepted: 05/27/2014] [Indexed: 10/25/2022]
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Zhang T, Holder E, Franco P, Lindner W. Zwitterionic chiral stationary phases based on cinchona and chiral sulfonic acids for the direct stereoselective separation of amino acids and other amphoteric compounds. J Sep Sci 2014; 37:1237-47. [DOI: 10.1002/jssc.201400149] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/10/2014] [Accepted: 03/10/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Tong Zhang
- Chiral Technologies Europe; Bd. Gonthier d’Andernach; Illkirch France
| | - Emilie Holder
- Chiral Technologies Europe; Bd. Gonthier d’Andernach; Illkirch France
| | - Pilar Franco
- Chiral Technologies Europe; Bd. Gonthier d’Andernach; Illkirch France
| | - Wolfgang Lindner
- Department of Analytical Chemistry; University of Vienna; Vienna Austria
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