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Li W, Lu HT, Doblin MS, Bacic A, Stevens GW, Mumford KA. A solvent loss study for the application of solvent extraction processes in the pharmaceutical industry. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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2
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Karimi-Maleh H, Khataee A, Karimi F, Baghayeri M, Fu L, Rouhi J, Karaman C, Karaman O, Boukherroub R. A green and sensitive guanine-based DNA biosensor for idarubicin anticancer monitoring in biological samples: A simple and fast strategy for control of health quality in chemotherapy procedure confirmed by docking investigation. CHEMOSPHERE 2022; 291:132928. [PMID: 34800513 DOI: 10.1016/j.chemosphere.2021.132928] [Citation(s) in RCA: 134] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/01/2021] [Accepted: 11/14/2021] [Indexed: 05/25/2023]
Abstract
Drug efficiency can be considerably boosted while adverse effects can be reduced by precisely monitoring the concentration of anti-cancer drugs. Thus, one of the most important parameters for human health is the monitoring and detection of anticancer drugs during chemotherapy treatment. Herein, a glassy carbon electrode (GCE) was modified by Pt- and Pd-incorporated ZnO nanoparticles-decorated single-wall carbon nanotubes (Pt-Pd-ZnO/SWCNTs) nanocomposites, and ds-DNA (Calf Thymus) that was a biological recognition element, and it was aimed to be utilized as an ultrasensitive and effective electroanalytical biosensor for idarubicin (IDR) monitoring. Various physicochemical characterization techniques including transmission electron microscopy (TEM), field-emission scanning electron microscopy (FE-SEM) with energy-dispersive X-ray spectroscopy (EDS) were used to investigate the morphology and structure of the Pt-Pd-ZnO/SWCNTs nanocomposite, which was produced via straightforward chemical precipitation combined with the one-pot method. The layer-by-layer modification technique was implemented to fabricate the ds-DNA/Pt-Pd-ZnO/SWCNTs/GCE to be further utilized as a voltammetric sensor for sensitive monitoring of idarubicin in biological fluids and pharmaceutical substances. The electroanalytical method implemented to detect idarubicin was based to detect the ds-DNA's guanine base signal on the surface of the modified electrode in the absence and presence of the anticancer drug. The results explicated that the developed biosensor performed well in determining idarubicin in concentrations ranging from 1.0 nM to 65 μM, with a detection limit of 0.8 nM. The idarubicin detection ability of the modified electrode in real samples was evaluated, and the recovery data was acquired in the range of 98.0% and 104.75%. In the final step, the preferential intercalative binding mode of idarubicin drug with ds-DNA was approved by molecular docking study. This study paves the way for engineering highly sensitive DNA biosensors to be employed in the monitoring of anticancer drugs by combining the benefits of nanocomposites and valuable information of a molecular docking study.
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Affiliation(s)
- Hassan Karimi-Maleh
- School of Resources and Environment, University of Electronic Science and Technology of China, P.O. Box 611731, Xiyuan Ave, Chengdu, PR China; Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, 9477177870, Iran; Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, 2028 Johannesburg, P.O. Box 17011, South Africa.
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran; Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey
| | - Fatemeh Karimi
- Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, 9477177870, Iran.
| | - Mehdi Baghayeri
- Department of Chemistry, Faculty of Science, Hakim Sabzevari University, PO. Box 397, Sabzevar, Iran
| | - Li Fu
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, PR China
| | - Jalal Rouhi
- Faculty of Physics, University of Tabriz, Tabriz, 51566, Iran
| | - Ceren Karaman
- Akdeniz University, Department of Electricity and Energy, Antalya, 07070, Turkey.
| | - Onur Karaman
- Akdeniz University, Department of Medical Imaging Techniques, Antalya, 07070, Turkey
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520 - IEMN, F-59000, Lille, France
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3
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Maliszewska O, Treder N, Olędzka II, Kowalski P, Miękus N, Bączek T, Rodzaj W, Bień E, Krawczyk MA, Plenis A. Sensitive Analysis of Idarubicin in Human Urine and Plasma by Liquid Chromatography with Fluorescence Detection: An Application in Drug Monitoring. Molecules 2020; 25:E5799. [PMID: 33316898 PMCID: PMC7764277 DOI: 10.3390/molecules25245799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 12/07/2020] [Indexed: 11/16/2022] Open
Abstract
A new approach for the sensitive, robust and rapid determination of idarubicin (IDA) in human plasma and urine samples based on liquid chromatography with fluorescence detection (LC-FL) was developed. Satisfactory chromatographic separation of the analyte after solid-phase extraction (SPE) was performed on a Discovery HS C18 analytical column using a mixture of acetonitrile and 0.1% formic acid in water as the mobile phase in isocratic mode. IDA and daunorubicin hydrochloride used as an internal standard (I.S.) were monitored at the excitation and emission wavelengths of 487 and 547 nm, respectively. The method was validated according to the FDA and ICH guidelines. The linearity was confirmed in the range of 0.1-50 ng/mL and 0.25-200 ng/mL, while the limit of detection (LOD) was 0.05 and 0.125 ng/mL in plasma and urine samples, respectively. The developed LC-FL method was successfully applied for drug determinations in human plasma and urine after oral administration of IDA at a dose of 10 mg to a patient with highly advanced alveolar rhabdomyosarcoma (RMA). Moreover, the potential exposure to IDA present in both fluids for healthcare workers and the caregivers of patients has been evaluated. The present LC-FL method can be a useful tool in pharmacokinetic and clinical investigations, in the monitoring of chemotherapy containing IDA, as well as for sensitive and reliable IDA quantitation in biological fluids.
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Affiliation(s)
- Olga Maliszewska
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland; (O.M.); (N.T.); (I.O.); (P.K.); (N.M.); (T.B.)
| | - Natalia Treder
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland; (O.M.); (N.T.); (I.O.); (P.K.); (N.M.); (T.B.)
| | - IIona Olędzka
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland; (O.M.); (N.T.); (I.O.); (P.K.); (N.M.); (T.B.)
| | - Piotr Kowalski
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland; (O.M.); (N.T.); (I.O.); (P.K.); (N.M.); (T.B.)
| | - Natalia Miękus
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland; (O.M.); (N.T.); (I.O.); (P.K.); (N.M.); (T.B.)
| | - Tomasz Bączek
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland; (O.M.); (N.T.); (I.O.); (P.K.); (N.M.); (T.B.)
| | - Wojciech Rodzaj
- Department of Toxicology, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland;
| | - Ewa Bień
- Department of Pediatrics, Hematology and Oncology, Medical University Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland; (E.B.); (M.A.K.)
| | - Małgorzata Anna Krawczyk
- Department of Pediatrics, Hematology and Oncology, Medical University Gdańsk, Dębinki 7, 80-210 Gdańsk, Poland; (E.B.); (M.A.K.)
| | - Alina Plenis
- Department of Pharmaceutical Chemistry, Medical University of Gdańsk, Hallera 107, 80-416 Gdańsk, Poland; (O.M.); (N.T.); (I.O.); (P.K.); (N.M.); (T.B.)
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4
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Carbon-based ruthenium nanomaterial-based electroanalytical sensors for the detection of anticancer drug Idarubicin. Sci Rep 2020; 10:11057. [PMID: 32632278 PMCID: PMC7338395 DOI: 10.1038/s41598-020-68055-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 06/17/2020] [Indexed: 12/02/2022] Open
Abstract
In this work, a novel nanosensing platform was suggested based on ruthenium for the sensitive determination of Idarubicin anticancer drugs. Ruthenium/Vulcan carbon-based nanoparticles were synthesized ultrasonication method and then characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The mean particle size of the nanoparticles calculated by the TEM analysis was found to be 1.98 nm ± 0.29 nm, and the Ru nanoparticles were mostly dispersed on the support material. Glassy carbon electrode (GCE) surface was modified with Ruthenium/Vulcan carbon-based nanomaterials (Ru@VC), and characterization of the nanosensor was performed using electrochemical impedance spectroscopy and cyclic voltammetry. The limit of detection (LOD) and limit of quantification (LOQ) values were found as 9.25 × 10–9 M and 2.8 × 10–8 M in buffer samples. To demonstrate the applicability and validity of developed nanosensor, it was used for the determination of Idarubicin in Idamen® IV (10 mg/10 mL vial) and human serum sample. The results of recovery studies showed that the Ru@VC/GCE nanosensor was free from excipient interferences in the dosage forms of injection, and it can be successfully applied to biological samples.
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Guichard N, Ogereau M, Falaschi L, Rudaz S, Schappler J, Bonnabry P, Fleury-Souverain S. Determination of 16 antineoplastic drugs by capillary electrophoresis with UV detection: Applications in quality control. Electrophoresis 2018; 39:2512-2520. [DOI: 10.1002/elps.201800007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 01/23/2018] [Accepted: 02/07/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Nicolas Guichard
- Pharmacy; Geneva University Hospitals; Geneva Switzerland
- School of Pharmaceutical Sciences, University of Geneva; University of Lausanne; Geneva Switzerland
| | - Marie Ogereau
- Pharmacy; Geneva University Hospitals; Geneva Switzerland
| | | | - Serge Rudaz
- School of Pharmaceutical Sciences, University of Geneva; University of Lausanne; Geneva Switzerland
| | - Julie Schappler
- School of Pharmaceutical Sciences, University of Geneva; University of Lausanne; Geneva Switzerland
| | - Pascal Bonnabry
- Pharmacy; Geneva University Hospitals; Geneva Switzerland
- School of Pharmaceutical Sciences, University of Geneva; University of Lausanne; Geneva Switzerland
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Eda Satana Kara H. Redox mechanism of anticancer drug idarubicin and in-situ evaluation of interaction with DNA using an electrochemical biosensor. Bioelectrochemistry 2014; 99:17-23. [DOI: 10.1016/j.bioelechem.2014.06.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 05/21/2014] [Accepted: 06/04/2014] [Indexed: 01/30/2023]
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7
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In vitro DNA binding studies of anticancer drug idarubicin using spectroscopic techniques. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 138:36-42. [PMID: 24911270 DOI: 10.1016/j.jphotobiol.2014.05.015] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 05/05/2014] [Accepted: 05/07/2014] [Indexed: 11/22/2022]
Abstract
The interaction between idarubicin and double stranded deoxyribonucleic acid (ds-DNA) was investigated by UV-VIS spectrophotometry, fluorescence and Raman spectroscopy techniques. The absorption spectra of idarubicin with ds-DNA showed a slight red shift and hypochromic effect. In the fluorescence experiments, emission peaks were decreased by adding ds-DNA. Using ethidium bromide (ETB) as a fluorescence probe, fluorescence quenching of the emission peak was observed in the ETB-DNA system when idarubicin was added. Moreover, similar results were obtained in Raman spectroscopy. Binding constants of idarubicin with ds-DNA were determined as 5.14×10(5) M(-1) and 5.8×10(5) M(-1) for UV-VIS spectrophotometry and fluorescence spectroscopy, respectively. The large binding constant indicated that idarubicin has a high affinity with ds-DNA. All the evidences indicated that the binding mode of idarubicin with DNA was an intercalative binding. Furthermore, quantitative determination of idarubicin in pharmaceutical formulation was done.
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8
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Kurbanoglu S, Dogan-Topal B, Uslu B, Can A, Ozkan SA. Electrochemical Investigations of the Anticancer Drug Idarubicin Using Multiwalled Carbon Nanotubes Modified Glassy Carbon and Pyrolytic Graphite Electrodes. ELECTROANAL 2013. [DOI: 10.1002/elan.201300048] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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9
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Maudens KE, Stove CP, Lambert WE. Quantitative liquid chromatographic analysis of anthracyclines in biological fluids. J Chromatogr B Analyt Technol Biomed Life Sci 2011; 879:2471-86. [PMID: 21840776 DOI: 10.1016/j.jchromb.2011.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 07/01/2011] [Accepted: 07/07/2011] [Indexed: 10/18/2022]
Abstract
Anthracyclines are amongst the most widely used drugs in oncology, being part of the treatment regimen in most patients receiving systemic chemotherapy. This review provides a comprehensive summary of the sample preparation techniques and chromatographic methods that have been developed during the last two decades for the analysis of the 4 most administered anthracyclines, doxorubicin, epirubicin, daunorubicin and idarubicin in plasma, serum, saliva or urine, within the context of clinical and pharmacokinetic studies or for assessing occupational exposure. Following deproteinization, liquid-liquid extraction, solid phase extraction or a combination of these techniques, the vast majority of methods utilizes reversed-phase C18 stationary phases for liquid chromatographic separation, followed by fluorescence detection, or, more recently, tandem mass spectrometric detection. Some pros and cons of the different techniques are addressed, in addition to potential pitfalls that may be encountered in the analysis of this class of compounds.
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Affiliation(s)
- Kristof E Maudens
- Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk-Antwerp, Belgium
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10
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Jemelková Z, Zima J, Barek J. Voltammetric and amperometric determination of doxorubicin using carbon paste electrodes. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2009081] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Direct current voltammetric (DCV) and differential pulse voltammetric (DPV) determination of antineoplastic agent doxorubicin (DOX) at a carbon paste electrode (CPE) was developed. Britton–Robinson buffer (pH 7.0) was used as a supporting electrolyte. The limits of detection are 8 × 10–7 mol l–1 (DCV) and 6 × 10–8 mol l–1 (DPV). The accumulation of DOX at the electrode surface was used to decrease the limits of detection down to 2.2 × 10–7 mol l–1 for adsorptive stripping DC voltammetry (DCAdSV) and 2.8 × 10–9 mol l–1 for adsorptive stripping differential pulse voltammetry (DPAdSV) at CPE. The results of the voltammetric methods were utilized for the development of a new determination of doxorubicin using HPLC with amperometric detection on CPE based on spherical microparticles of glassy carbon in a wall-jet configuration. A column with chemically bonded C18 stationary phase and a mobile phase containing 0.01 M phosphate buffer (pH 5.0)–methanol 25:75 (v/v) were used. The limit of detection is 4 × 10–7 mol l–1 (HPLC with electrochemical detection (ED)).
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11
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DeGregorio MW, Dingley KH, Wurz GT, Ubick E, Turteltaub KW. Accelerator mass spectrometry allows for cellular quantification of doxorubicin at femtomolar concentrations. Cancer Chemother Pharmacol 2005; 57:335-42. [PMID: 16047147 DOI: 10.1007/s00280-005-0060-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2005] [Accepted: 05/30/2005] [Indexed: 10/25/2022]
Abstract
Accelerator mass spectrometry (AMS) is a highly sensitive analytical methodology used to quantify the content of radioisotopes, such as (14)C, in a sample. The primary goals of this work were to demonstrate the utility of AMS in determining total cellular [(14)C]anthracycline concentrations following administration of doxorubicin (DOX) and to develop a sensitive assay that is superior to high performance liquid chromatography (HPLC) for the quantification of [(14)C]anthracycline at the tumor level. In order to validate the sensitivity of AMS versus HPLC with fluorescence detection, we performed three studies comparing the cellular accumulation of DOX: one in vitro cell line study, and two in vivo xenograft mouse studies. Using AMS, we quantified cellular [(14)C]anthracycline content up to 4 h following in vitro exposure at concentrations ranging from 0.2 pg/ml (345 fM) to 2 microg/ml (3.45 microM) [(14)C]DOX. The results of this study show that, compared to standard fluorescence-based HPLC, the AMS method was over five orders of magnitude more sensitive. Two in vivo studies compared the sensitivity of AMS to HPLC using a nude mouse xenograft model in which breast cancer cells were implanted subcutaneously. After sufficiently large tumors formed, [(14)C]DOX was administered intravenously at two dose levels. Additionally, we tested the AMS method in a nude mouse xenograft model of multidrug resistance (MDR) in which each mouse was implanted with both wild type and MDR+ cells on opposite flanks. The results of the second and third studies showed that [(14)C]anthracycline concentrations were significantly higher in the wild type tumors compared to the MDR+ tumors, consistent with the MDR model. Although this method does not discriminate between parent drug and metabolites, the extreme sensitivity of AMS should facilitate similar studies in humans to establish target site drug delivery and to potentially determine the optimal treatment dose and regimen.
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MESH Headings
- Animals
- Antibiotics, Antineoplastic/administration & dosage
- Antibiotics, Antineoplastic/analysis
- Antibiotics, Antineoplastic/pharmacokinetics
- Carbon Radioisotopes/pharmacokinetics
- Cell Line, Tumor
- Chromatography, High Pressure Liquid/methods
- Dose-Response Relationship, Drug
- Doxorubicin/administration & dosage
- Doxorubicin/analysis
- Doxorubicin/pharmacokinetics
- Female
- Humans
- Liver/metabolism
- Mammary Neoplasms, Experimental/metabolism
- Mammary Neoplasms, Experimental/pathology
- Mass Spectrometry/methods
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Neoplasm Transplantation
- Reproducibility of Results
- Transplantation, Heterologous
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Affiliation(s)
- M W DeGregorio
- University of California, Davis, Department of Internal Medicine, Division of Hematology and Oncology, Cancer Center, Sacramento, 95817, USA.
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12
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Saito Y, Hayashida M, Jinno K. Sample preparation for the analysis of drugs in biological fluids. HANDBOOK OF ANALYTICAL SEPARATIONS 2004. [DOI: 10.1016/s1567-7192(04)80002-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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13
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Hu Q, Hu G, Zhou T, Fang Y. Determination of dissociation constants of anthrocycline by capillary zone electrophoresis with amperometric detection. J Pharm Biomed Anal 2003; 31:679-84. [PMID: 12644194 DOI: 10.1016/s0731-7085(02)00681-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although daunorubicin, pharmorubicin and idarubicin are important drugs in medical and in pharmaceutical research, the dissociation constants (K(a)) of these substances are frequently not known. A method based on a non-linear model enabling the efficient determination of the K(a) of the three drugs by capillary zone electrophoresis with amperometric detection (CZE-AD) has been demonstrated. The pK(a) values obtained through the method were in agreement with the values by typical spectrophotometric method.
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Affiliation(s)
- Qin Hu
- Department of Physiology and Pharmacology, Nanjing Medical University, Jiangsu 210029, Nanjing, People's Republic of China
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Anderson AB, Ciriacks CM, Fuller KM, Arriaga EA. Distribution of zeptomole-abundant doxorubicin metabolites in subcellular fractions by capillary electrophoresis with laser-induced fluorescence detection. Anal Chem 2003; 75:8-15. [PMID: 12530812 DOI: 10.1021/ac020426r] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Doxorubicin (DOX) treatment of NS-1 mouse hybridoma cells results in the formation of zeptomole amounts of metabolites per cell that are difficult to determine by confocal microscopy or HPLC. The native fluorescence of DOX and its metabolites together with laser-induced fluorescence detection (HF) has previously been used to detect a maximum of four components. In this study, we use capillary electrophoresis with postcolumn LIF (CE-LIF) to separate and detect 12 components attributed to DOX metabolism, resulting from treatment of NS-1 cells with 25 microM DOX for 8 h. The so-called metabolites 8 and 10 have been identified as doxorubicinone (DOXone) and 7-deoxydoxorubicinone (7-deoxyDOXone), respectively, by comigration with the corresponding synthetic standard. Due to comigration of DOX with doxorubicinol (DOXone), the presence of DOXone had to be determined separately by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The rest of the metabolites remain unidentified and are referred to by their number assignment. In comparison with the whole cell lysate, fractionation by differential centrifugation results in a better separation resolution of metabolites due to reduced amounts of metabolites in each fraction. This approach was chosen to compare the distribution of 13 metabolites in three subcellular fractions that form a pellet at < 1,400 g, 1,400-14,000 g, and > 14, 000 g and that generically are enriched in nuclei, organelles (mitochondria and lysosomes), and cytosolic components, respectively. The most abundant metabolite, DOXone, was estimated to be 90 +/- 15, 18 +/- 2, and 60 +/- 12 amol/cell (n = 5) in the nuclear-enriched, organelle-enriched, and cytosole-enriched fractions, respectively. In contrast, the total amount of other metabolites in a given fraction varied from 0 to 1,300 zmol. 7-DeoxyDOXone is the only metabolite that was present at similar levels in the three fractions. Other salient observations are metabolites 3, 7, and 11 are not detectable in the nuclear-enriched, organelle-enriched, and cytosole-enriched fractions, respectively; metabolite 9 and DOXone are more abundant in the nuclear-enriched fraction than in the other two fractions. The observations presented here suggest that subcellular fractionation followed by CE-LIF could be a powerful diagnostic for monitoring drug distribution, which is highly relevant to DOX cytoxicity studies.
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Affiliation(s)
- Adrian B Anderson
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
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15
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Griese N, Blaschke G, Boos J, Hempel G. Determination of free and liposome-associated daunorubicin and daunorubicinol in plasma by capillary electrophoresis. J Chromatogr A 2002; 979:379-88. [PMID: 12498269 DOI: 10.1016/s0021-9673(02)01440-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Liposomal daunorubicin (DaunoXome) is a formulation of the anticancer drug daunorubicin encapsulated into vesicles of about 45 nm diameter. To understand the pharmacodynamic relationships associated with the toxicity and efficacy of liposome-encapsulated daunorubicin in vivo and in vitro, it is essential to have a rapid method of separating the free and liposomal forms of the drug. We have developed and validated a method to quantify drug concentrations of liposomal daunorubicin, free daunorubicin and its main metabolite daunorubicinol that requires only 50 microl of plasma to conduct studies in children. The method involves the use of solid-phase extraction followed by capillary electrophoresis with laser-induced fluorescence (LIF) detection. With LIF detection a limit of quantification of 1 microg/l is obtained for the free form and the metabolite. Precision and accuracy are in accordance with the generally accepted criteria for bioanalytical methods. The method is rapid and allows for multiple samples to be processed simultaneously.
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Affiliation(s)
- Nina Griese
- Klinik und Poliklinik für Kinderheilkunde, Pädiatrische Hämatologie/Onkologie, Universität Münster, Albert-Schweitzer-Strasse 33, 48149 Münster, Germany.
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16
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Anderson AB, Gergen J, Arriaga EA. Detection of doxorubicin and metabolites in cell extracts and in single cells by capillary electrophoresis with laser-induced fluorescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 769:97-106. [PMID: 11936700 DOI: 10.1016/s1570-0232(01)00633-x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Capillary electrophoresis with laser-induced fluorescence detection was used to separate and detect doxorubicin and at least five metabolites from NS-1 cells that were treated with 25 microM doxorubicin for 8 h. Using 10 mM borate, 10 mM sodium dodecyl sulfate (pH 9.3) as separation buffer, the 488-nm argon-ion laser line for fluorescence excitation, and a 635 +/- 27.5 nm bandpass filter for detection, the limit of detection (S/N=3) for doxorubicin is 61 +/- 13 zmol. This low limit of detection allows for the detection of a larger number of metabolites than previously reported. Two extraction procedures were performed: a bulk liquid-liquid extraction and an in-capillary single-cell lysis. While in the bulk liquid-liquid extraction procedure, recovery for doxorubicin range from 50 to 99%, in single cell analysis the recovery is expected to be complete. Furthermore performing lysis of a single cell inside the separation capillary prevents doxorubicin or metabolite loss or degradation during handling. Based on the bulk method the calculated metabolite abundance is in the sub-amol per cell range while it varies from 0.1 to 1.1 fmol per cell in single cell analysis confirming metabolite loss during handling. Each metabolite was found at a level less than 0.1% of the doxorubicin content in either method, suggesting a slow metabolism in the NS-1 cell system or effective removal of metabolites by the cell.
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Affiliation(s)
- Adrian B Anderson
- Department of Chemistry, University of Minnesota, Minneapolis 55455, USA
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17
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Zagotto G, Gatto B, Moro S, Sissi C, Palumbo M. Anthracyclines: recent developments in their separation and quantitation. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2001; 764:161-71. [PMID: 11817026 DOI: 10.1016/s0378-4347(01)00346-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Anthracyclines are among the most widely used anticancer agents. Notwithstanding the large efforts to develop new drugs with a better pharmaceutical profile, daunorubicin, doxorubicin, epirubicin and idarubicin are still the most used in clinical practice. Many efforts are now ongoing to reduce the side effects by using pharmaceutical formulations able to release the drug in the most appropriate way and monitoring the quantity of anthracyclines and their metabolites in the body fluids or tissues frequently and in every patient to maintain the drug concentration within the expected range. This review describes the most recent developments in the separation and quantitation of the above clinically useful drugs, together with their principal metabolites. Some less widely used derivatives will also be considered.
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Affiliation(s)
- G Zagotto
- Department of Pharmaceutical Sciences, University of Padova, Italy.
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18
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Gavenda A, Sevcík J, Psotová J, Bednár P, Barták P, Adamovský P, Simánek V. Determination of anthracycline antibiotics doxorubicin and daunorubicin by capillary electrophoresis with UV absorption detection. Electrophoresis 2001; 22:2782-5. [PMID: 11545408 DOI: 10.1002/1522-2683(200108)22:13<2782::aid-elps2782>3.0.co;2-i] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Sweeping preconcentration and electrokinetic injection was used for the capillary electrophoretic analysis of trace amounts of biologically active anthracyclines with UV absorption detection. Phosphate buffer (100 mM), pH 2.5, with addition of 40% v/v methanol was used as background electrolyte (BGE). Sodium dodecyl sulfate (150 mM) was added to BGE in the inlet vial as the sweeping agent. The system enables effective separation of anthracyclines as well as cleanup from matrix impurities. Sweeping preconcentration of sample provides an excellent detection limit (1 x 10(-9) mol L(-1)). The method was applied for the determination of therapeutic levels of doxorubicin in real plasma samples.
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Affiliation(s)
- A Gavenda
- Department of Analytical Chemistry, Palacky University, Olomouc, Czech Republic
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19
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Hempel G, Schulze-Westhoff P, Flege S, Boos J. Quantification of daunorubicin and daunorubicinol in plasma by capillary electrophoresis. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2001; 758:221-8. [PMID: 11486832 DOI: 10.1016/s0378-4347(01)00185-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Capillary electrophoresis (CE) with laser-induced fluorescence detection was applied to quantify daunorubicin and daunorubicinol in plasma. Separation was carried out in a 47 cm x 50 microm I.D. fused-silica capillary, with a running buffer. pH 5 containing 60 microM spermine and 70% acetonitrile. Sample preparation was done either by protein precipitation with acetonitrile or by liquid-liquid extraction. The assay can be applied in a concentration range from 40 mg/l down to 2 microg/l for daunorubicin and from 1 mg/l to 2 microg/l for daunorubicinol. Precision and accuracy were between 2.9 and 14.5% (n=6) on 1 day and between 1.0 and 14.7% from day to day (n=6) for both analytes. Thus, the CE method enables precise and accurate quantification of daunorubicin and daunorubicinol in small sample volumes over a wide concentration range.
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Affiliation(s)
- G Hempel
- Institut für Pharmazeutische Chemie, Universität Münster, Germany.
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20
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Szwarocka A, Kowalczyk A, Łubgan D, Józwiak Z. The combined effect of IDA and glutaraldehyde on the properties of human erythrocytes. Int J Pharm 2001; 220:43-51. [PMID: 11376966 DOI: 10.1016/s0378-5173(01)00643-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The effect of IDA and glutaraldehyde on the properties of human erythrocytes was examined by Electron Spin Resonance spectroscopy and fluorescence measurements. In this study glutaraldehyde was used as the agent linking the drug to the erythrocyte membrane. We have demonstrated that idarubicin (IDA) alone caused only negligible changes of the membrane fluidity. When IDA preincubated erythrocytes were treated with glutaraldehyde, the alterations in the fluidity were observed in the polar parts as well as in the deeper regions of the cell membrane. The incorporation of drug and glutaraldehyde into human erythrocytes also caused conformational alterations of membrane cytoskeletal proteins and changes in the internal viscosity of the cells. Our data suggest that glutaraldehyde in idarubicin-pretreated erythrocytes may potentiate the drug toxicity leading to significant perturbations in the organization of the plasma membrane lipids and proteins.
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Affiliation(s)
- A Szwarocka
- Department of Thermobiology, University of Łódź, Banacha 12/16 Str, 90-237, Łódź, Poland.
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21
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Pérez-Ruiz T, Martínez-Lozano C, Sanz A, Bravo E. Simultaneous determination of doxorubicin, daunorubicin, and idarubicin by capillary electrophoresis with laser-induced fluorescence detection. Electrophoresis 2001; 22:134-8. [PMID: 11197162 DOI: 10.1002/1522-2683(200101)22:1<134::aid-elps134>3.0.co;2-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The separation and simultaneous determination of doxorubicin, daunorubicin and idarubicin was investigated using capillary electrophoresis with laser-induced fluorescence detection. Because the three anthracycline antibiotics were similar in structure and mass, careful manipulation of the electroosmotic flow and electrophoretic mobilities was required. A buffer consisting of 100 mM borate, adjusted to pH 9.5, containing 30% acetonitrile was found to provide a very efficient and stable electrophoretic system for the analysis of the three anthracyclines. The method was applied to the determination of three anthracyclines in serum samples. Responses were linear in the range of 10-500 ng.mL-1 and the detection limits were lower than 0.9 ng.mL-1.
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Affiliation(s)
- T Pérez-Ruiz
- Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, 30071, Murcia, Spain.
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22
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Smeets M, Raymakers R, Muus P, Vierwinden G, Linssen P, Masereeuw R, de Witte T. Cyclosporin increases cellular idarubicin and idarubicinol concentrations in relapsed or refractory AML mainly due to reduced systemic clearance. Leukemia 2001; 15:80-8. [PMID: 11243404 DOI: 10.1038/sj.leu.2401996] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The feasibility of adding both the multidrug resistance modulator cyclosporin (CsA) and granulocyte colony-stimulating factor (G-CSF) to a standard salvage regimen of idarubicin (IDA) and cytarabine was evaluated in patients with resistant or relapsed acute myeloid leukemia and myelodysplastic syndrome. Three patients received IDA 12 mg/m2/day, the next four patients 9 mg/m2/day. The dose of CsA was 16 mg/kg/day. Six patients showed Pgp expression and none MRP1 expression. Grade III or IV toxicity (CTC-NCIC criteria) was registered in six patients for gastrointestinal, two patients for cardiovascular and one patient for neurological complications. Three patients died in hypoplasia and three patients showed leukemic regrowth. Three control patients were treated with IDA 12 mg/m2/day and cytarabine, but no CsA and G-CSF. The plasma IDA and idarubicinol (ida-ol) area under the curve's of patients treated with IDA 12 mg/m2 plus CsA were higher (P< 0.05) than in controls. Cellular IDA concentrations were almost similar, but cellular ida-ol concentrations were significantly higher (P < 0.05) in the presence of CsA than in controls. We conclude that the toxicity either with IDA 12 or 9 mg/m2/day was too high. The modulating effect of CsA was mainly based on changes in plasma kinetics of IDA and ida-ol, although ida-ol cellular clearance was delayed in the presence of CsA.
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Affiliation(s)
- M Smeets
- Department of Hematology, University Medical Center Nijmegen, The Netherlands
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23
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Pedersen-Bjergaard S, Rasmussen KE, Halvorsen TG. Liquid-liquid extraction procedures for sample enrichment in capillary zone electrophoresis. J Chromatogr A 2000; 902:91-105. [PMID: 11192163 DOI: 10.1016/s0021-9673(00)00738-x] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This review article presents an overview of applications of liquid-liquid extraction (LLE) for analyte enrichment and clean-up of samples prior to capillary zone electrophoresis (CZE). The basic principles of LLE are discussed with special emphasis on analyte enrichment. In addition, attention is focused on the requirements for the final extract to be compatible with CZE. The paper discusses selected examples from the literature with special emphasis on detection limits in drug analysis and in environmental chemistry. Finally, the paper focus on alternative liquid-phase extraction concepts based on electroextraction, supported liquid membranes, and liquid-phase microextraction.
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24
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Thorsén G, Bergquist J. Chiral separation of amino acids in biological fluids by micellar electrokinetic chromatography with laser-induced fluorescence detection. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2000; 745:389-97. [PMID: 11043757 DOI: 10.1016/s0378-4347(00)00310-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A method is presented for the chiral analysis of amino acids in biological fluids using micellar electrokinetic chromatography (MEKC) and laser-induced fluorescence (LIF). The amino acids are derivatized with the chiral reagent (+/-)-1-(9-anthryl)-2-propyl chloroformate (APOC) and separated using a mixed micellar separation system. No tedious pre-purification of samples is required. The excellent separation efficiency and good detection capabilities of the MEKC-LIF system are exemplified in the analysis of urine and cerebrospinal fluid. This is the first time MEKC has been reported for chiral analysis of amino acids in biological fluids. The amino acids D-alanine, D-glutamine, and D-aspartic acid have been observed in cerebrospinal fluid, and D-alanine and D-glutamic acid in urine. To the best of our knowledge no measurements of either D-alanine in cerebrospinal fluid or D-glutamic acid in urine have been presented in the literature before.
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Affiliation(s)
- G Thorsén
- Department of Analytical Chemistry, Stockholm University, Sweden.
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25
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Laubrock N, Hempel G, Schulze-Westhoff P, Würthwein G, Flege S, Boos J. The stability of doxorubicin and ldarubicin in plasma and whole blood. Chromatographia 2000. [DOI: 10.1007/bf02490784] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Capillary electrophoresis (CE) is a useful method to quantify drugs in biological fluids. However, especially for blood or plasma samples, the sensitivity is not sufficient to quantify drugs and their metabolites as they often need to be quantified in the lower microg/L range. To overcome this limitation and to increase the sensitivity, two strategies are applied: first, to increase the amount of analyte added to the capillary and, second, to increase the sensitivity on the detector site. To improve the sensitivity on the detector site, alternative detection techniques to UV detection, e.g., laser-induced fluorescence detection (LIF) or mass spectroscopy (MS), can be applied. However, LIF detection can only be used for fluorescent analytes and the current equipment for CE-MS coupling provides only small improvements in sensitivity compared to UV detection. The detection window for UV detection can be enhanced using capillaries with an extended light path (bubble cell) or Z-shaped capillaries. Sensitivity improvements up to a factor of 10 have been reported. Increasing the amount of analyte in the capillary can be done either by chromatographic or by electrokinetic methods. Chromatographic methods such as on-capillary membrane preconcentration have been used for several analytes. However, no validated application has been reported to date. In contrast, several validated examples can be found in which electrokinetic techniques like sample stacking have been applied to achieve limits of quantification in the lower microg/L range. In conclusion, to date, electrokinetic techniques such as field-amplified sample injection offer the most promising results in achieving a sufficient sensitivity to quantify drugs in biological fluids.
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Affiliation(s)
- G Hempel
- Institut für Pharmazeutische, Chemie der Universität, Münster, Germany.
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27
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Abstract
The broad category of antibiotics encompasses some of the most widely prescribed pharmaceuticals in the world. As is the case with any pharmaceutical, an antibiotic must be characterized in terms of its potency and the presence and quantity of impurities. Additionally, any residue or metabolite that may be present as a result of its use must be monitored. Many capillary electrophoretic techniques have been utilized in the analysis of antibiotics, addressing the various aspects of quantifying, profiling, and monitoring. Some of the more recent applications are summarized in this review article.
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Affiliation(s)
- C L Flurer
- Forensic Chemistry Center, US Food and Drug Administration, Cincinnati, OH 45237, USA.
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28
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Abstract
This review briefly discusses the use of capillary electrophoretic (CE) methods for the investigations of different aspects of pharmacokinetics. In most investigations, CE was the method of choice because of its unique features, including high resolving power for chiral or metabolite separation, small sample volume for pediatric pharmacokinetics or for cell-based investigations, in situ microdialysis sampling for rapid eliminations, low UV wavelength detection for nonderivatized analytes, fast and simplified sample processing for existing methods that require tedious sample preparation, or as a second method for verifications. Moreover, instrumental aspects of CE-based assays for pharmacokinetic studies, such as different modes of CE methods for analyzing biological samples, sample stacking for increasing detection sensitivity, and coupling techniques with microdialysis and mass spectrometry, are also discussed in this review. Furthermore, the advantages and limitations of CE methods as well as the future outlook for pharmacokinetic studies are summarized.
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Affiliation(s)
- S H Chen
- Department of Chemistry, National Cheng Kung University, Tainan, Taiwan, ROC.
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29
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Thormann W, Wey AB, Lurie IS, Gerber H, Byland C, Malik N, Hochmeister M, Gehrig C. Capillary electrophoresis in clinical and forensic analysis: recent advances and breakthrough to routine applications. Electrophoresis 1999; 20:3203-36. [PMID: 10596826 DOI: 10.1002/(sici)1522-2683(19991001)20:15/16<3203::aid-elps3203>3.0.co;2-e] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This paper is a comprehensive review article on capillary electrophoresis (CE) in clinical and forensic analysis. It is based upon the literature of 1997 and 1998, presents CE examples in major fields of application, and provides an overview of the key achievements encountered, including those associated with the analysis of drugs, serum proteins, hemoglobin variants, and nucleic acids. For CE in clinical and forensic analysis, the past two years witnessed a breakthrough to routine applications. As most coauthors of this review are associated with diagnostic or forensic laboratories now using CE on a routine basis, this review also contains data from routine applications in drug, protein, and DNA analysis. With the first-hand experience of providing analytical service under stringent quality control conditions, aspects of quality assurance, assay specifications for clinical and forensic CE and the pros and cons of this maturing, cost-and pollution-controlled age technology are also discussed.
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Affiliation(s)
- W Thormann
- Department of Clinical Pharmacology, University of Bern, Switzerland.
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Boone CM, Waterval JC, Lingeman H, Ensing K, Underberg WJ. Capillary electrophoresis as a versatile tool for the bioanalysis of drugs--a review. J Pharm Biomed Anal 1999; 20:831-63. [PMID: 10746954 DOI: 10.1016/s0731-7085(99)00088-6] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This review article presents an overview of current research on the use of capillary electrophoretic techniques for the analysis of drugs in biological matrices. The principles of capillary electrophoresis and its various separation and detection modes are briefly discussed. Sample pretreatment methods which have been used for clean-up and concentration are discussed. Finally, an extensive overview of bioanalytical applications is presented. The bioanalyses of more than 200 drugs have been summarised, including the applied sample pretreatment methods and the achieved detection limits.
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Affiliation(s)
- C M Boone
- Department of Analytical Chemistry and Toxicology, University Center for Pharmacy, Groningen, The Netherlands.
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31
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Hempel G, Schulze-Westhoff P, Flege S, Laubrock N, Boos J. Therapeutic drug monitoring of doxorubicin in paediatric oncology using capillary electrophoresis. Electrophoresis 1998; 19:2939-43. [PMID: 9870393 DOI: 10.1002/elps.1150191624] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A method for the determination of doxorubicin and its main metabolite doxorubicinol in human plasma is described. Two different sample preparation procedures are applied depending on the expected concentration: To monitor the peak plasma levels, 10 microL of plasma are deproteinated with acetonitrile. After centrifugation, the supernatant is directly applied to the capillary by hydrodynamic injection. For the determination of lower amounts of doxorubicin and its main metabolite doxorubicinol 100 microL of plasma is extracted by liquid-/liquid extraction with chloroform. After evaporation of the organic phase, the sample is reconstituted in acetonitrile/water (95/5 v/v) and injected into the capillary by electrokinetic injection. Idarubicin serves as the internal standard. Laser-induced fluorescence detection with an Ar-ion laser emitting at 488 nm and a 520 nm cut-off filter is used for detection. The accuracy of the method was calculated to be 3.0% at higher concentrations and 15.0% at the limit of quantification. Reproducibility data are in accordance to the generally accepted criteria for bioanalytical methods. The limit of quantification is 2 microg/L, enabling us to monitor doxorubicin plasma levels for several days after application. Noninvasive blood sampling (from the fingertip) using heparinized capillaries was found to be a simple and convenient procedure and provides reproducible data. Initial results show high interindividual variability in doxorubicin peak plasma levels.
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Affiliation(s)
- G Hempel
- Universitäts-Kinderklinik, Abt. Hämatologie/Onkologie, Münster, Germany.
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32
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Wätzig H, Degenhardt M, Kunkel A. Strategies for capillary electrophoresis: method development and validation for pharmaceutical and biological applications. Electrophoresis 1998; 19:2695-752. [PMID: 9870372 DOI: 10.1002/elps.1150191603] [Citation(s) in RCA: 157] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review is in support of the development of selective, reproducible and validated capillary electrophoretis (CE) methods. Focusing on pharmaceutical and biological applications, the successful use of CE is demonstrated by more than 800 references, mainly from 1994 until 1998. Approximately 80 recent reviews have been catalogued. These articles sum up the existing strategies for method development in CE, especially in the search for generally accepted concepts, but also looking for new, promising reagents and ideas. General strategies for method development were derived not only with regard to selectivity and efficiency, but also with regard to precision, short analysis time, limit of detection, sample pretreatment requirements and validation. Standard buffer recipes, surfactants used in micellar electrokinetic capillary chromatography (MEKC), chiral selectors, useful buffer additives, polymeric separation media, electroosmotic flow (EOF) modifiers, dynamic and permanent coatings, actions to deal with complex matrices and aspects of validation are collected in 20 tables. Detailed schemes for the development of MEKC methods and chiral separations, for optimizing separation efficiency, means of troubleshooting, and other important information for key decisions during method development are given in 19 diagrams. Method development for peptide and protein separations, possibilities to influence the EOF and how to stabilize it, as well as indirect detection are considered in special sections.
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Affiliation(s)
- H Wätzig
- Institut für Pharmazie und Lebensmittelchemie, Würzburg, Germany.
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Couderc F, Caussé E, Bayle C. Drug analysis by capillary electrophoresis and laser-induced fluorescence. Electrophoresis 1998; 19:2777-90. [PMID: 9870374 DOI: 10.1002/elps.1150191605] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review briefly presents the different laser-induced fluorescence detectors, outlines the different dyes used to derivatize molecules which are used with capillary electrophoresis/laser-induced fluorescence (CE-LIF), and provides an overview and current status of CE-LIF in drug analysis.
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Affiliation(s)
- F Couderc
- Université Paul Sabatier, Laboratoire de Biologie Moléculaire Eucaryotes, Toulouse, France.
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Taylor RB, Toasaksiri S, Reid RG. A literature assessment of sample pretreatments and limits of detection for capillary electrophoresis of drugs in biological fluids and practical investigation with some antimalarials in plasma. Electrophoresis 1998; 19:2791-7. [PMID: 9870375 DOI: 10.1002/elps.1150191606] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A literature survey on published reports of the determination of drugs in biological fluids shows that all methods of sample pretreatment have been used and that the limits of detection achieved vary widely, ranging from low ngcm(-3) to microgcm(-3). The most widely used injection method was hydrodynamic and, in the majority of cases, whenever low detection limits were achieved, this was a result of preconcentration during the sample pretreatment. Only a small proportion of the reported methods employed electrokinetic injection and utilised the field amplified sample injection (FASI) techniques. An experimental investigation of the alternative hydrodynamic and electrokinetic injection methods for a small set of antimalarial drugs is reported. It was found that electrokinetic injection with FASI from an acetonitrile-water matrix produced dramatic improvements in detection limits. This improvement could not, however, be achieved when the drugs were in plasma using protein precipitation, liquid-liquid extraction or solid phase extraction pretreatment methods. This highlights the importance of sample pretreatment in utilising the potential sensitivity of capillary electrophoresis with electrokinetic injection.
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Affiliation(s)
- R B Taylor
- School of Pharmacy, The Robert Gordon University, Schoolhill, Aberdeen, UK.
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35
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Iwaki M, Murakami E, Kikuchi M, Wada A, Ogiso T, Oda Y, Kubo K, Kakehi K. Simultaneous determination of nicotinic acid and its metabolites in rat urine by micellar electrokinetic chromatography with photodiode array detection. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 1998; 716:335-42. [PMID: 9824248 DOI: 10.1016/s0378-4347(98)00327-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Nicotinic acid, nicotinamide and their possible metabolites were successfully separated within 17 min by micellar electrokinetic chromatography using 50 mM borate buffer (pH 9.0) containing 150 mM sodium dodecyl sulfate as the running buffer. Calibration curves for all compounds showed good linearity in a range of 5 microg/ml and 250 microg/ml with good correlation. The present method did not require any clean-up procedures and made it possible to determine all metabolites without interference on a photodiode array detector. Urine samples collected from Wistar male rats were analyzed after high-dose oral or intravenous administration of nicotinic acid or nicotinamide. Metabolic pathways of nicotinic acid in male Wistar rats are also discussed.
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Affiliation(s)
- M Iwaki
- Faculty of Pharmaceutical Sciences, Kinki University, Higashi-osaka, Japan
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