1
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Gotti R, Fiori J, Furlanetto S, Orlandini S, Candela M, Franzellitti S. Assessment of bioaccumulation of glyphosate and aminomethylphosphonic acid in marine mussels using capillary electrophoresis with light‐emitting diode‐induced fluorescence detection. J Chromatogr A 2022; 1681:463452. [DOI: 10.1016/j.chroma.2022.463452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 10/15/2022]
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2
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Alatawi H, Hogan A, Albalawi I, O'Sullivan‐Carroll E, Alsefri S, Wang Y, Moore E. Rapid determination of NSAIDs by capillary and microchip electrophoresis with capacitively coupled contactless conductivity detection in wastewater. Electrophoresis 2022; 43:1944-1952. [PMID: 35946549 PMCID: PMC9804212 DOI: 10.1002/elps.202200116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 07/22/2022] [Accepted: 07/29/2022] [Indexed: 01/13/2023]
Abstract
A simple, rapid method using CE and microchip electrophoresis with C4 D has been developed for the separation of four nonsteroidal anti-inflammatory drugs (NSAIDs) in the environmental sample. The investigated compounds were ibuprofen (IB), ketoprofen (KET), acetylsalicylic acid (ASA), and diclofenac sodium (DIC). In the present study, we applied for the first time microchip electrophoresis with C4 D detection to the separation and detection of ASA, IB, DIC, and KET in the wastewater matrix. Under optimum conditions, the four NSAIDs compounds could be well separated in less than 1 min in a BGE composed of 20 mM His/15 mM Tris, pH 8.6, 2 mM hydroxypropyl-beta-cyclodextrin, and 10% methanol (v/v) at a separation voltage of 1000-1200 V. The proposed method showed excellent repeatability, good sensitivity (LODs ranging between 0.156 and 0.6 mg/L), low cost, high sample throughputs, portable instrumentation for mobile deployment, and extremely lower reagent and sample consumption. The developed method was applied to the analysis of pharmaceuticals in wastewater samples with satisfactory recoveries ranging from 62.5% to 118%.
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Affiliation(s)
- Hanan Alatawi
- School of ChemistryUniversity College CorkCorkIreland
| | - Anna Hogan
- School of ChemistryUniversity College CorkCorkIreland
| | | | | | - Samia Alsefri
- School of ChemistryUniversity College CorkCorkIreland
| | | | - Eric Moore
- School of ChemistryUniversity College CorkCorkIreland,Tyndall National InstituteCorkIreland
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3
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Riasová P, Jenčo J, Moreno-González D, Vander Heyden Y, Mangelings D, Polášek M, Jáč P. Development of a capillary electrophoresis method for the separation of flavonolignans in silymarin complex. Electrophoresis 2022; 43:930-938. [PMID: 34751959 DOI: 10.1002/elps.202100212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 11/11/2022]
Abstract
CE method for the baseline separation of structurally similar flavonolignans silybin A, silybin B, isosilybin A, isosilybin B, silychristin, silydianin, and their precursor taxifolin in silymarin complex has been developed and validated. The optimized background electrolyte was 100 mmol/L boric acid (pH 9.0) containing 5 mmol/L heptakis(2,3,6-tri-O-methyl)-β-CD and 10% (v/v) of methanol. The separation was carried out in an 80.5/72 cm (50 μm id) fused silica capillary at +25 kV with UV detection at 200 nm. Genistein (10 μg/mL) was used as internal standard. The resolution between the diastereomers of silybin and isosilybin was 1.73 and 2.59, respectively. The method was validated for each analyte in a concentration range of 2.5-50 μg/mL. The calibration curves were rectilinear with correlation coefficients ≥0.9972. The method was applied to determine flavonolignans in two dietary supplements containing Silybum marianum extract. The accuracy was evaluated by comparing the results of the CE analyses of the dietary supplements with those of the reference United States Pharmacopeial HPLC method. The unpaired t-test did not show a statistically significant difference between the results of both the proposed CE and the reference method (p > 0.05, n = 3).
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Affiliation(s)
- Petra Riasová
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
- Department of Analytical Chemistry, Applied Chemometrics and Molecular Modelling, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Jaroslav Jenčo
- Department of Pharmaceutical Botany, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - David Moreno-González
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Yvan Vander Heyden
- Department of Analytical Chemistry, Applied Chemometrics and Molecular Modelling, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Debby Mangelings
- Department of Analytical Chemistry, Applied Chemometrics and Molecular Modelling, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Miroslav Polášek
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Pavel Jáč
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
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4
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Quality by Design Assisted Optimization of a Chiral Capillary Electrokinetic Chromatographic Method for the Separation of Amlodipine Enantiomers Using Maltodextrin as Chiral Selector. Pharmaceuticals (Basel) 2022; 15:ph15030319. [PMID: 35337117 PMCID: PMC8955793 DOI: 10.3390/ph15030319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 02/24/2022] [Accepted: 03/01/2022] [Indexed: 11/29/2022] Open
Abstract
Analytical-method development based on design of experiment has been applied for optimizing the enantioseparation of amlodipine by chiral capillary electrokinetic chromatography using maltodextrin as the chiral selector. The effect of different factors on the enantioresolution quality was screened. Three separation factors, namely maltodextrin concentration, pH of the background electrolyte and applied voltage were selected as independent variables. The number of experiments was reduced while maximizing the information content using design of experiment. Based on a full-quadratic design that included three variables on three levels, the total design space could be reduced to fifteen factor combinations using a D-optimal algorithm. The aim of the experiment was to find the optimal factor combinations with respect to resolution. The maltodextrin concentration (7.5–10% w/v) demonstrated the strongest effect on the resolution followed by pH (2–4) of the background electrolyte and the applied voltage (15–20 kV). An increase in the maltodextrin concentration was found to result in a greater stereoselectivity, represented by the higher resolution values (Rs ≥ 1.5). The separation conditions in the proposed method were feasible to be adjusted within the applied range with an acceptable resolution.
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5
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Mauro G, Black N, Billiot E, Billiot F, Morris KF, Fang Y. Chiral Recognition of Dansyl Derivatives with an Amino Acid-Based Molecular Micelle: A Molecular Dynamics Investigation. ACTA ACUST UNITED AC 2021; 11:64-86. [PMID: 34123572 DOI: 10.4236/ojpc.2021.112004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this study, the chiral separation mechanisms of Dansyl amino acids, including Dansyl-Leucine (Dans-Leu), Dansyl-Norleucine (Dans-Nor), Dansyl-Tryptophan (Dans-Trp) and Dansyl-Phenylalanine (Dans-Phe) binding to poly-sodium N-undecanoyl-(L)-Leucylvalinate, poly(SULV), were investigated using molecular dynamics simulations. Micellar electrokinetic chromatography (MEKC) has previously shown that when separating the enantiomers of these aforementioned Dansyl amino acids, the L- enantiomers bind stronger to poly(SULV) than the D- enantiomers. This study aims to investigate the molecular interactions that govern chiral recognition in these systems using computational methods. This study reveals that the computationally-calculated binding free energy values for Dansyl enantiomers binding to poly(SULV) are in agreement with the enantiomeric order produced in experimental MEKC studies. The L- enantiomers of Dans-Leu, Dans-Nor, Dans-Trp, and Dans-Phe binding to their preferred binding pockets in poly(SULV) yielded binding free energy values of -21.8938, -22.1763, -21.3329 and -13.3349 kJ·mol-1, respectively. The D- enantiomers of Dans-Leu, Dans-Nor, Dans-Trp, and Dans-Phe binding to their preferred binding pockets in poly(SULV) yielded binding free energy values of -14.5811, -15.9457, -13.6408, and -12.0959 kJ·mol-1, respectively. Furthermore, hydrogen bonding analyses were used to investigate and elucidate the molecular interactions that govern chiral recognition in these molecular systems.
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Affiliation(s)
- Garcia Mauro
- Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, Corpus Christi, TX, USA
| | - Nathan Black
- Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, Corpus Christi, TX, USA
| | - Eugene Billiot
- Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, Corpus Christi, TX, USA
| | - Fereshteh Billiot
- Department of Physical and Environmental Sciences, Texas A&M University-Corpus Christi, Corpus Christi, TX, USA
| | - Kevin F Morris
- Department of Chemistry, Carthage College, Kenosha, WI, USA
| | - Yayin Fang
- Department of Biochemistry and Molecular Biology, Howard University, Washington, DC, USA
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6
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Hancu G, Papp LA, Tóth G, Kelemen H. The Use of Dual Cyclodextrin Chiral Selector Systems in the Enantioseparation of Pharmaceuticals by Capillary Electrophoresis: An Overview. Molecules 2021; 26:2261. [PMID: 33919692 PMCID: PMC8069766 DOI: 10.3390/molecules26082261] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 11/17/2022] Open
Abstract
Cyclodextrin (CD) derivatives are the most efficient and frequently used chiral selectors (CSs) in capillary electrophoresis (CE). There are situations when the use of a single CD as CS is not enough to obtain efficient chiral discrimination of the enantiomers; in these cases, sometimes this problem can be resolved using a dual CD system. The use of dual CD systems can often dramatically enhance enantioseparation selectivity and can be applied for the separation of many analytes of pharmaceutical interest for which enantioseparation by CE with another CS systems can be problematic. Usually in a dual CD system an anionic CD is used together with a neutral one, but there are situations when the use of a cationic CD with a neutral one or the use of two neutral CDs or even two ionized CDs can be an efficient solution. In the current review we present general aspects of the use of dual CD systems in the analysis of pharmaceutical substances. Several examples of applications of the use of dual CD systems in the analysis of pharmaceuticals are selected and discussed. Theoretical aspects regarding the separation of enantiomers through simultaneous interaction with the two CSs are also explained. Finally, advantages, disadvantages, potential and new direction in this chiral analysis field are highlighted.
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Affiliation(s)
- Gabriel Hancu
- Department of Pharmaceutical and Therapeutic Chemistry, Faculty of Pharmacy, University of Medicine, Pharmacy, Science and Technology “George Emil Palade” of Târgu Mureș, 540142 Târgu Mureș, Romania; (G.H.); (H.K.)
| | - Lajos Attila Papp
- Department of Pharmaceutical and Therapeutic Chemistry, Faculty of Pharmacy, University of Medicine, Pharmacy, Science and Technology “George Emil Palade” of Târgu Mureș, 540142 Târgu Mureș, Romania; (G.H.); (H.K.)
| | - Gergő Tóth
- Department of Pharmaceutical Chemistry, Semmelweis University, H-1092 Budapest, Hungary;
| | - Hajnal Kelemen
- Department of Pharmaceutical and Therapeutic Chemistry, Faculty of Pharmacy, University of Medicine, Pharmacy, Science and Technology “George Emil Palade” of Târgu Mureș, 540142 Târgu Mureș, Romania; (G.H.); (H.K.)
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7
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Grodner B, Napiórkowska M. Dual 2-Hydroxypropyl-β-Cyclodextrin and 5,10,15,20-Tetrakis (4-Hydroxyphenyl) Porphyrin System as a Novel Chiral-Achiral Selector Complex for Enantioseparation of Aminoalkanol Derivatives with Anticancer Activity in Capillary Electrophoresis. Molecules 2021; 26:molecules26040993. [PMID: 33668491 PMCID: PMC7918572 DOI: 10.3390/molecules26040993] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, a complex consisting of 2-hydroxypropyl-β-cyclodextrin and 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin, (named dual chiral-achiral selector complex) was used for the determination of two novel potential anticancer agents of (I) and (II) aminoalkanol derivatives. This work aimed at developing an effective method that can be utilized for the determination of I (S), I (R), and II (S) and II (R) enantiomers of (I) and (II) compounds through the use of a dual chiral-achiral selector complex consisting of hydroxypropyl-β-cyclodextrin and 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin system by applying capillary electrophoresis. This combination proved to be beneficial in achieving high separation selectivity due to the combined effects of different modes of chiral discrimination. The enantiomers of (I) and (II) compounds were separated within a very short time of 3.6–7.2 min, in pH 2.5 phosphate buffer containing 2-hydroxypropyl-β-cyclodextrin and 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin system at a concentration of 5 and 10 mM, respectively, at 25 °C and +10 kV. The detection wavelength of the detector was set at 200 nm. The LOD for I (S), I (R), II (S), and II (R) was 65.2, 65.6, 65.1, and 65.7 ng/mL, respectively. LOQ for I (S), I (R), II (S), and II (R) was 216.5, 217.8, 217.1, and 218.1 ng/mL, respectively. Recovery was 94.9–99.9%. The repeatability and reproducibility of the method based on the values of the migration time, and the area under the peak was 0.3–2.9% RSD. The stability of the method was determined at 0.1–4.9% RSD. The developed method was used in the pilot studies for determining the enantiomers I (S), I (R), II (S), and II (R) in the blood serum.
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Affiliation(s)
- Błażej Grodner
- Chair and Department of Biochemistry and Pharmacogenomics, Medical University of Warsaw, 1 Banacha Str., 02-097 Warsaw, Poland
- Correspondence: or
| | - Mariola Napiórkowska
- Chair and Department of Biochemistry, Medical University of Warsaw, 1 Banacha Str., 02-097 Warsaw, Poland;
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8
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de Koster N, Clark CP, Kohler I. Past, present, and future developments in enantioselective analysis using capillary electromigration techniques. Electrophoresis 2021; 42:38-57. [PMID: 32914880 PMCID: PMC7821218 DOI: 10.1002/elps.202000151] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 08/22/2020] [Accepted: 09/08/2020] [Indexed: 12/16/2022]
Abstract
Enantioseparation of chiral products has become increasingly important in a large diversity of academic and industrial applications. The separation of chiral compounds is inherently challenging and thus requires a suitable analytical technique that can achieve high resolution and sensitivity. In this context, CE has shown remarkable results so far. Chiral CE offers an orthogonal enantioselectivity and is typically considered less costly than chromatographic techniques, since only minute amounts of chiral selectors are needed. Several CE approaches have been developed for chiral analysis, including chiral EKC and chiral CEC. Enantioseparations by EKC benefit from the wide variety of possible pseudostationary phases that can be employed. Chiral CEC, on the other hand, combines chromatographic separation principles with the bulk fluid movement of CE, benefitting from reduced band broadening as compared to pressure-driven systems. Although UV detection is conventionally used for these approaches, MS can also be considered. CE-MS represents a promising alternative due to the increased sensitivity and selectivity, enabling the chiral analysis of complex samples. The potential contamination of the MS ion source in EKC-MS can be overcome using partial-filling and counter-migration techniques. However, chiral analysis using monolithic and open-tubular CEC-MS awaits additional method validation and a dedicated commercial interface. Further efforts in chiral CE are expected toward the improvement of existing techniques, the development of novel pseudostationary phases, and establishing the use of chiral ionic liquids, molecular imprinted polymers, and metal-organic frameworks. These developments will certainly foster the adoption of CE(-MS) as a well-established technique in routine chiral analysis.
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Affiliation(s)
- Nicky de Koster
- Leiden Academic Centre for Drug Research, Division of Systems Biomedicine and PharmacologyLeiden UniversityLeidenThe Netherlands
| | - Charles P. Clark
- Leiden Academic Centre for Drug Research, Division of Systems Biomedicine and PharmacologyLeiden UniversityLeidenThe Netherlands
| | - Isabelle Kohler
- Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Amsterdam Institute for Molecular and Life SciencesVrije Universiteit AmsterdamAmsterdamThe Netherlands
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9
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Amorim TL, Duarte LM, da Silva EM, de Oliveira MAL. Capillary electromigration methods for fatty acids determination in vegetable and marine oils: A review. Electrophoresis 2020; 42:289-304. [PMID: 33169855 DOI: 10.1002/elps.202000260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/23/2020] [Accepted: 11/05/2020] [Indexed: 11/12/2022]
Abstract
Fatty acids determination is of paramount importance for quality control and suitable labeling of edible oils, required by regulatory agencies in several countries, and fast methods for this determination are worldly desired. This review article aimed to explore the available analytical methods for vegetable and marine oils analyses employing CE, which can be a straightforward and faster alternative than GC methods for fatty acid determination, considering some purposes. CE usually offers the possibility of a rapid analysis with a simple preparation of the sample, without requiring specific columns, which are inherent advantages of the technique. Instrumental conditions and the key points about fatty acids determination employing the technique are highlighted, and the main challenges and perspectives are also approached. Potential use of CE for edible oil analyses has been demonstrated for research and routine, which can be of interest for industries, regulatory agencies, and edible oil researchers. Therefore, we have explored the analytical approaches described in the last decades, intending to spread the interest of CE methods for fatty acid monitoring, label accuracy assessment, and food authenticity evaluation of edible oils.
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Affiliation(s)
- Tatiane Lima Amorim
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Lucas Mattos Duarte
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Erick Mendes da Silva
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Marcone Augusto Leal de Oliveira
- Grupo de Química Analítica e Quimiometria (GQAQ), Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
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10
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Unveiling the Thermodynamic Aspects of Drug-Cyclodextrin Interactions Through Isothermal Titration Calorimetry. Methods Mol Biol 2020. [PMID: 33113137 DOI: 10.1007/978-1-0716-0920-0_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Due to their low toxicity and high aqueous solubility, cyclodextrins have emerged as a distinctive class of supramolecules with wide application in the pharmaceutical and food industry. Their ability to improve the water solubility, stability and pharmacokinetic profile of small molecules has established them as a rich toolkit for drug formulation. In order to improve the physicochemical characteristics and the pharmacokinetic profile of a drug through cyclodextrin inclusion, the proper cyclodextrin type has to be selected among the existing great variety consisting of both natural and synthetic variants. The selection of the most proper cyclodextrin variant comes after drug-cyclodextrin screening studies targeting the characterization of the complex formation and evaluation of the affinity and interaction forces participating in the complexation. Numerous analytical, spectroscopic, separation and electrochemical techniques have been applied to elucidate the interaction profile in a cyclodextrin-drug complex. Herein, we describe the application of Isothermal Titration Calorimetry (ITC) on cyclodextrin-drug complexes that enables the charting of the binding affinity and the thermodynamic profile of the inclusion complexes. We focus on the experimental design and present technical tips of the ITC application. To better illustrate the technique's rationale, the interaction between 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) and the antihypertensive drug losartan is investigated.
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11
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Quality by Design-Based Development of a Chiral Capillary Electrophoresis Method for the Determination of Dextrodropropizine and 1-Phenylpiperazine as Impurities of Levodropropizine. Chromatographia 2019. [DOI: 10.1007/s10337-019-03817-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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12
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Zhang C, Woolfork AG, Suh K, Ovbude S, Bi C, Elzoeiry M, Hage DS. Clinical and pharmaceutical applications of affinity ligands in capillary electrophoresis: A review. J Pharm Biomed Anal 2019; 177:112882. [PMID: 31542417 DOI: 10.1016/j.jpba.2019.112882] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/07/2019] [Accepted: 09/10/2019] [Indexed: 01/14/2023]
Abstract
Affinity capillary electrophoresis (ACE) is a separation technique that combines a biologically-related binding agent with the separating power and efficiency of capillary electrophoresis. This review will examine several classes of binding agents that have been used in ACE and applications that have been described for the resulting methods in clinical or pharmaceutical analysis. Binding agents that will be considered are antibodies, aptamers, lectins, serum proteins, carbohydrates, and enzymes. This review will also describe the various formats in which each type of binding agent has been used in CE, including both homogeneous and heterogeneous methods. Specific areas of applications that will be considered are CE-based immunoassays, glycoprotein/glycan separations, chiral separations, and biointeraction studies. The general principles and formats of ACE for each of these applications will be examined, along with the potential advantages or limitations of these methods.
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Affiliation(s)
- Chenhua Zhang
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Ashley G Woolfork
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Kyungah Suh
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Susan Ovbude
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Cong Bi
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Marawan Elzoeiry
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA.
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13
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Hu S, Zhang M, Li F, Breadmore MC. β-Cyclodextrin-copper (II) complex as chiral selector in capillary electrophoresis for the enantioseparation of β-blockers. J Chromatogr A 2019; 1596:233-240. [DOI: 10.1016/j.chroma.2019.03.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 02/28/2019] [Accepted: 03/12/2019] [Indexed: 11/29/2022]
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14
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Michalska K, Bocian W, Bednarek E, Pałys B, Cielecka-Piontek J. Enantioselective recognition of sutezolid by cyclodextrin modified non-aqueous capillary electrophoresis and explanation of complex formation by means of infrared spectroscopy, NMR and molecular modelling. J Pharm Biomed Anal 2019; 169:49-59. [PMID: 30836246 DOI: 10.1016/j.jpba.2019.02.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/12/2019] [Accepted: 02/19/2019] [Indexed: 11/16/2022]
Abstract
A method for the enantioseparation of sutezolid, the next analogue after linezolid and tedizolid, belonging to the truly new class of antibacterial agents, the oxazolidinones, was developed based on non-aqueous capillary electrophoresis (NACE), using a single isomer of cyclodextrins as a chiral pseudophase. During the experiment, the enantioseparation of sutezolid together with its predecessor, linezolid, both weak base antibacterial agents, was evaluated using anionic single-isomers of cyclodextrins from hydrophilic, up to hydrophobic: heptakis-(2,3-dihydroxy-6-sulfo)-β-cyclodextrin, heptakis-(2,3-diacetyl-6-sulfo)-β-cyclodextrin (HDAS-β-CD), as well as heptakis-(2,3-dimethyl-6-sulfo)-β-cyclodextrin (HDMS-β-CD), respectively. Based on the observed results, the cyclodextrins, HDAS-β-CD and HDMS-β-CD which carry the acetyl and methyl groups at the C2 and C3 positions, respectively, provided the baseline separation of sutezolid enantiomers. However, HDMS-β-CD led to a reversal of enantiomer migration order (EMO) in comparison to HDAS-β-CD. Instead, enantiomers of linezolid were separated only by HDMS-β-CD. During the experiments, different organic solvents and their mixtures in various ratios were tested. The selectivity and separation efficiency were critically affected by the nature of the buffer system, the type of organic solvent, and the concentrations of trifluoroacetic acid (TFA) in the NACE buffer system. Focusing on the desired EMO in which the eutomers (S)-sutezolid and (S)-linezolid migrated last, the highest enantioresolution using the NACE method was achieved at normal polarity mode with 45 mM HDMS-β-CD dissolved in MeOH/ACN (85:15, v/v) containing 200 mM TFA/20 mM ammonium formate. Moreover, infrared spectroscopy, NMR and molecular modelling were investigated to provide information about complex formation.
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Affiliation(s)
- Katarzyna Michalska
- Department of Antibiotics and Microbiology, National Medicines Institute, Chełmska 30/34, 00-725, Warsaw, Poland.
| | - Wojciech Bocian
- Department of Counterfeit Medicinal Products and Drugs, National Medicines Institute, Chełmska 30/34, 00-725, Warsaw, Poland
| | - Elżbieta Bednarek
- Department of Counterfeit Medicinal Products and Drugs, National Medicines Institute, Chełmska 30/34, 00-725, Warsaw, Poland
| | - Barbara Pałys
- Laboratory of Electrochemistry, Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Judyta Cielecka-Piontek
- Department of Pharmacognosy, Poznań University of Medical Sciences, Swiecickiego 4, 60-781, Poznan, Poland
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15
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Ma H, Liu T, Li J, Ding M, Gao XM, Chang YX. The in-capillary- 2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)-sweeping micellar electrokinetic chromatography - Diode array detector method for screening and quantifying trace natural antioxidants from Schisandra chinensis. J Chromatogr A 2019; 1593:147-155. [PMID: 30685187 DOI: 10.1016/j.chroma.2019.01.050] [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] [Received: 08/14/2018] [Revised: 01/11/2019] [Accepted: 01/18/2019] [Indexed: 02/06/2023]
Abstract
An in-capillary 2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)-sweeping micellar electrokinetic chromatography-diode array detector (ABTS+-sweeping MEKC-DAD) method was developed and successfully applied to screening and quantifying antioxidative ingredients from natural products. The parameters affecting sweeping and separation were optimized including components of background electrolyte and sample matrix. Comparing with previously reported MEKC, the sensitivity enhancement factors of trace natural antioxidants obtained by this proposed method were from 17 to 167. The limit of detection was as low as 6 ng·mL-1. The results of other validation parameters including linearity, reproducibility, accuracy and recovery were satisfactory. Seven compounds including schizandrin, schisandrol B, schisantherin B, schisantherin A, schisanhenol, deoxyschizandrin, schisandrin B were identified as the main antioxidants in Schisandra chinensis. It was demonstrated that this developed in-capillary ABTS+-sweeping MEKC-DAD is simple, sensitive, reliable and rapid method for screening and quantifying trace antioxidants from natural products.
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Affiliation(s)
- Huifen Ma
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China; Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine), Ministry of Education, Tianjin, 300193, China
| | - Tao Liu
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China; Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine), Ministry of Education, Tianjin, 300193, China
| | - Jin Li
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China; Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine), Ministry of Education, Tianjin, 300193, China
| | - Mingya Ding
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China; Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine), Ministry of Education, Tianjin, 300193, China
| | - Xiu-Mei Gao
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China; Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine), Ministry of Education, Tianjin, 300193, China.
| | - Yan-Xu Chang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China; Key Laboratory of Formula of Traditional Chinese Medicine (Tianjin University of Traditional Chinese Medicine), Ministry of Education, Tianjin, 300193, China.
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16
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Abstract
Stereospecific recognition of chiral molecules plays an important role in nature as the basis of the interaction of chiral bioactive compounds with the chiral target structures. In separation sciences such as chromatographic and capillary electromigration techniques, interactions between chiral analytes and chiral selectors, i.e., the formation of transient diastereomeric complexes in thermodynamic equilibria, are the basis for chiral separations. Due to the large structural variety of chiral selectors, different structural features contribute to the overall chiral recognition process. This introductory chapter briefly summarizes the present understanding of the structural enantioselective recognition processes for various types of chiral selectors.
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Affiliation(s)
- Gerhard K E Scriba
- Department of Pharmaceutical Chemistry, University of Jena, Jena, Germany.
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17
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Scriba GKE, Jáč P. Cyclodextrins as Chiral Selectors in Capillary Electrophoresis Enantioseparations. Methods Mol Biol 2019; 1985:339-356. [PMID: 31069743 DOI: 10.1007/978-1-4939-9438-0_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Due to their structural variability and their commercial availability, cyclodextrins are the most frequently used chiral selectors in capillary electrophoresis. A variety of migration modes can be realized depending on the characteristics of the cyclodextrins and the analytes. The basic considerations regarding the development of a chiral CE method employing cyclodextrins as chiral selectors are briefly discussed. The presented examples illustrate the separation modes of an acidic and a basic analyte with native and charged cyclodextrin derivatives as a function of the pH of the background electrolyte and the concentration of the cyclodextrin.
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Affiliation(s)
- Gerhard K E Scriba
- Department of Pharmaceutical Chemistry, University of Jena, Jena, Germany
| | - Pavel Jáč
- Faculty of Pharmacy in Hradec Králové, Department of Analytical Chemistry, Charles University, Hradec Králové, Czech Republic.
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18
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Separation of rotamers of 5-nitrosopyrimidines and estimation of binding constants of their complexes with β-cyclodextrin by capillary electrophoresis. J Chromatogr A 2018; 1570:164-171. [DOI: 10.1016/j.chroma.2018.07.083] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/25/2018] [Accepted: 07/29/2018] [Indexed: 12/12/2022]
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19
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Nagy G, Chouinard CD, Attah IK, Webb IK, Garimella SVB, Ibrahim YM, Baker ES, Smith RD. Distinguishing enantiomeric amino acids with chiral cyclodextrin adducts and structures for lossless ion manipulations. Electrophoresis 2018; 39:3148-3155. [PMID: 30168603 DOI: 10.1002/elps.201800294] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/20/2018] [Accepted: 08/20/2018] [Indexed: 02/06/2023]
Abstract
Enantiomeric molecular evaluations remain an enormous challenge for current analytical techniques. To date, derivatization strategies and long separation times are generally required in these studies, and the development and implementation of new approaches are needed to increase speed and distinguish currently unresolvable compounds. Herein, we describe a method using chiral cyclodextrin adducts and structures for lossless ion manipulations (SLIM) and serpentine ultralong path with extended routing (SUPER) ion mobility (IM) to achieve rapid, high resolution separations of d and l enantiomeric amino acids. In the analyses, a chiral cyclodextrin is added to each sample. Two cyclodextrins were found to complex each amino acid molecule (i.e. potentially sandwiching the amino acid in their cavities) and forming host-guest noncovalent complexes that were distinct for each d and l amino acid pair studied and thus separable with IM in SLIM devices. The SLIM was also used to accumulate much larger ion populations than previously feasible for evaluation and therefore allow enantiomeric measurements of higher sensitivity, with gains in resolution from our ultralong path separation capabilities, than previously reported by any other IM-based approach.
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Affiliation(s)
- Gabe Nagy
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, USA
| | | | - Isaac K Attah
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, USA
| | - Ian K Webb
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, USA
| | | | - Yehia M Ibrahim
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, USA
| | - Erin S Baker
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, USA
| | - Richard D Smith
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, USA
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20
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Study of the enantioselectivity and recognition mechanism of chiral dual system based on chondroitin sulfate D in capillary electrophoresis. Anal Bioanal Chem 2018; 410:5889-5898. [PMID: 30043111 DOI: 10.1007/s00216-018-1208-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/15/2018] [Accepted: 06/18/2018] [Indexed: 10/28/2022]
Abstract
Several chiral reagents including cyclodextrins (CDs) and derivatives, crown ethers, proteins, chiral surfactants, and polymers have been involved in dual-selector systems for enantioseparation of a series of compounds by capillary electrophoresis (CE). In this paper, chondroitin sulfate D-based dual-selector system (CSD/CM-β-CD) was firstly established and investigated for the enantioseparation of six basic racemic drugs in capillary electrophoresis. Compared to the single-selector systems, synergistic effect and significantly improved separations for all tested analytes were observed in CSD/CM-β-CD system. The effect of several parameters, such as buffer pH, chiral selector concentration, and applied voltage, was systematically optimized. Meanwhile, to investigate the possible chiral recognition mechanisms in CSD/CM-β-CD synergistic system, we tried to apply the molecular docking method to simulate the host-guest binding procedures of the polysaccharide-based dual system for the first time. The difference in binding free energy was found to correspond to the chiral selectivity factor. The existence of CSD-CM-β-CD complex may give rise to a higher discriminatory ability against the enantiomers, indicating the synergistic effect in CSD/CM-β-CD system. Graphical abstract ᅟ.
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21
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Krait S, Salgado A, Chankvetadze B, Gago F, Scriba GKE. Investigation of the complexation between cyclodextrins and medetomidine enantiomers by capillary electrophoresis, NMR spectroscopy and molecular modeling. J Chromatogr A 2018; 1567:198-210. [PMID: 30055912 DOI: 10.1016/j.chroma.2018.06.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 05/30/2018] [Accepted: 06/05/2018] [Indexed: 12/12/2022]
Abstract
The migration order of the enantiomers of medetomidine in the presence of cyclodextrins studied by capillary electrophoresis in phosphate buffer, pH 2.5, depended on the cavity size and the substitution pattern of the cyclodextrins. Opposite migration order was observed in the presence of β-cyclodextrin (β-CD) and γ-cyclodextrin (γ-CD) as well as randomly sulfated β-CD (S-β-CD) and heptakis(6-O-sulfo)-β-CD (HS-β-CD). This could be rationalized by the fact that dexmedetomidine formed more stable complexes with β-CD and S-β-CD, while levomedetomidine interacted stronger with γ-CD and HS-β-CD. The structure of the complexes was derived from rotating frame nuclear Overhauser (ROESY) experiments for β-CD, γ-CD and HS-β-CD. In the case of the native CDs, the phenyl ring of medetomidine entered the cavity through the wider secondary rim of the CDs, whereas the protonated imidazole ring was positioned inside the CD cavity interacting with the sulfate groups of HS-β-CD. Furthermore, molecular dynamics calculations also suggested opposite affinities of the medetomidine enantiomers toward β-CD and γ-CD.
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Affiliation(s)
- Sulaiman Krait
- Friedrich-Schiller-University Jena, Department of Pharmaceutical/Medicinal Chemistry, Philosophenweg 14, 07743 Jena, Germany
| | - Antonio Salgado
- University of Alcalá, NMR Spectroscopy Centre (CERMN), CAI Químicas, Faculty of Pharmacy, 28805 Alcalá de Henares, Madrid, Spain
| | - Bezhan Chankvetadze
- Tbilisi State University, Institute of Physical and Analytical Chemistry, School of Exact and Natural Sciences, 0179 Tbilisi, Georgia
| | - Federico Gago
- University of Alcalá, Department of Biomedical Sciences (Unidad Asociada IQM-CSIC) and Instituto de Investigación Química "Andrés M. del Río" (IQAR), 28805 Alcalá de Henares, Madrid, Spain
| | - Gerhard K E Scriba
- Friedrich-Schiller-University Jena, Department of Pharmaceutical/Medicinal Chemistry, Philosophenweg 14, 07743 Jena, Germany.
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22
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Wang X, Zhu Y, Liu J, Liu C, Cao C, Song W. Chiral Metal-Organic Framework Hollow Nanospheres for High-Efficiency Enantiomer Separation. Chem Asian J 2018; 13:1535-1538. [DOI: 10.1002/asia.201800330] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 03/19/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaoshi Wang
- Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructures and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences.; 100190 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
| | - Yanan Zhu
- Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructures and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences.; 100190 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
| | - Jian Liu
- Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructures and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences.; 100190 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
| | - Chang Liu
- Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructures and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences.; 100190 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
| | - Changyan Cao
- Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructures and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences.; 100190 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
| | - Weiguo Song
- Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructures and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences; Institute of Chemistry; Chinese Academy of Sciences.; 100190 Beijing China
- University of Chinese Academy of Sciences; 100049 Beijing China
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23
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Zhang X, Ma X, Wang K, Lin S, Zhu S, Dai Y, Xia F. Recent Advances in Cyclodextrin-Based Light-Responsive Supramolecular Systems. Macromol Rapid Commun 2018; 39:e1800142. [DOI: 10.1002/marc.201800142] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/13/2018] [Indexed: 01/12/2023]
Affiliation(s)
- Xiaojin Zhang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education; Faculty of Materials Science and Chemistry; China University of Geosciences; Wuhan 430074 People's Republic of China
| | - Xin Ma
- Engineering Research Center of Nano-Geomaterials of Ministry of Education; Faculty of Materials Science and Chemistry; China University of Geosciences; Wuhan 430074 People's Republic of China
| | - Kang Wang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education; Faculty of Materials Science and Chemistry; China University of Geosciences; Wuhan 430074 People's Republic of China
| | - Shijun Lin
- Engineering Research Center of Nano-Geomaterials of Ministry of Education; Faculty of Materials Science and Chemistry; China University of Geosciences; Wuhan 430074 People's Republic of China
| | - Shitai Zhu
- Engineering Research Center of Nano-Geomaterials of Ministry of Education; Faculty of Materials Science and Chemistry; China University of Geosciences; Wuhan 430074 People's Republic of China
| | - Yu Dai
- Engineering Research Center of Nano-Geomaterials of Ministry of Education; Faculty of Materials Science and Chemistry; China University of Geosciences; Wuhan 430074 People's Republic of China
| | - Fan Xia
- Engineering Research Center of Nano-Geomaterials of Ministry of Education; Faculty of Materials Science and Chemistry; China University of Geosciences; Wuhan 430074 People's Republic of China
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24
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A powerful on line ABTS +-CE-DAD method to screen and quantify major antioxidants for quality control of Shuxuening Injection. Sci Rep 2018; 8:5441. [PMID: 29615669 PMCID: PMC5883040 DOI: 10.1038/s41598-018-23748-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 03/20/2018] [Indexed: 12/15/2022] Open
Abstract
A novel method of on-line 2,2'-Azinobis-(3-ethylbenzthiazoline-6-sulphonate)-Capillary Electrophoresis-Diode Array Detector (on-line ABTS+-CE-DAD) was developed to screen the major antioxidants from complex herbal medicines. ABTS+, one of well-known oxygen free radicals was firstly integrated into the capillary. For simultaneously detecting and separating ABTS+ and chemical components of herb medicines, some conditions were optimized. The on-line ABTS+-CE-DAD method has successfully been used to screen the main antioxidants from Shuxuening injection (SI), an herbal medicines injection. Under the optimum conditions, nine ingredients of SI including clitorin, rutin, isoquercitrin, Quercetin-3-O-D-glucosyl]-(1-2)-L-rhamnoside, kaempferol-3-O-rutinoside, kaempferol-7-O-β-D-glucopyranoside, apigenin-7-O-Glucoside, quercetin-3-O-[2-O-(6-O-p-hydroxyl-E-coumaroyl)-D-glucosyl]-(1-2)-L-rhamnoside, 3-O-{2-O-[6-O-(p-hydroxyl-E-coumaroyl)-glucosyl]}-(1-2) rhamnosyl kaempfero were separated and identified as the major antioxidants. There is a linear relationship between the total amount of major antioxidants and total antioxidative activity of SI with a linear correlation coefficient of 0.9456. All the Relative standard deviations of recovery, precision and stability were below 7.5%. Based on these results, these nine ingredients could be selected as combinatorial markers to evaluate quality control of SI. It was concluded that on-line ABTS+-CE-DAD method was a simple, reliable and powerful tool to screen and quantify active ingredients for evaluating quality of herbal medicines.
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25
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Grodner B, Łukaszkiewicz J, Napiórkowska M. Determination of the stereoisomers in aqueous medium and serum and validation studies of racemic aminoalkanol derivatives of 1,7-dimethyl-8,9-diphenyl-4-azatricyclo[5.2.1.0(2,6) ]dec-8-ene-3,5,10-trione, potential new anticancer drugs, by capillary electrophoresis. J Sep Sci 2018; 39:3246-53. [PMID: 27421088 DOI: 10.1002/jssc.201600182] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Revised: 06/16/2016] [Accepted: 06/17/2016] [Indexed: 12/21/2022]
Abstract
A new method for the determination of the stereoisomers, in aqueous medium and serum, of the racemic aminoalkanol derivatives I and II of 1,7-dimethyl-8,9-diphenyl-4-azatricyclo[5.2.1.0(2,6) ]dec-8-ene-3,5,10-trione, which were found in earlier studies to be potential anticancer drugs, was developed and validated. The optimized conditions included 25 mM phosphate buffer adjusted to pH 2.5, containing γ-cyclodextrin at a concentration of 5% m/v, as background electrolyte, an applied voltage of +10 kV, and a temperature of 25°C. Separations were carried out using a fused-silica capillary. The developed method of determining the enantiomers of compounds I(S), I(R) and II(S), II(R) was characterized by the following parameters: a detection time within 10.8 min, a detection limit in the range of 141.2-141.7 ng/mL using the UV absorption detection at 200 nm. Good linearity (R(2) = 0.9989-0.9998) was achieved within the range of concentrations studied. A very good extraction yield of 95.4-99.7% was achieved, and recoveries were carried out from both aqueous solutions and matrix serum. The repeatability of the method for peak areas with an accuracy of the determined concentrations of the analytes in the range of 1.43-1.89%, and limits of quantitation in the range of 432.4-436.3 ng/mL were achieved.
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Affiliation(s)
- Błażej Grodner
- Chair and Department of Biochemistry and Clinical Chemistry, Medical University of Warsaw, Warsaw, Poland
| | - Jacek Łukaszkiewicz
- Chair and Department of Biochemistry and Clinical Chemistry, Medical University of Warsaw, Warsaw, Poland
| | - Mariola Napiórkowska
- Chair and Department of Biochemistry, Medical University of Warsaw, Warsaw, Poland
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26
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Zhu Q, Scriba GK. Analysis of small molecule drugs, excipients and counter ions in pharmaceuticals by capillary electromigration methods – recent developments. J Pharm Biomed Anal 2018; 147:425-438. [DOI: 10.1016/j.jpba.2017.06.063] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/26/2017] [Accepted: 06/27/2017] [Indexed: 12/12/2022]
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27
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Deng X, Li W, Ding G, Chen X. Enantioselective separation of RS-mandelic acid using β-cyclodextrin modified Fe3O4@SiO2/Au microspheres. Analyst 2018; 143:2665-2673. [DOI: 10.1039/c8an00427g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
β-Cyclodextrin functionalized magnetic microspheres were prepared via a self-assembly method and applied for the enantioselective absorption of enantiomers.
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Affiliation(s)
- Xiaojuan Deng
- School of Materials Science and Engineering
- Tianjin University
- Tianjin 300072
- China
- Analysis Center
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28
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Al-Burtomani SKS, Suliman FO. Experimental and theoretical study of the inclusion complexes of epinephrine with β-cyclodextrin, 18-crown-6 and cucurbit[7]uril. NEW J CHEM 2018. [DOI: 10.1039/c7nj04766e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Experimental and molecular dynamics techniques suggested that stable complexes of epinephrine with 18C6, βCD and CB7 might enhance aggregation.
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29
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Issaadi HM, Hunyadi A, Németh K. Capillary electrophoresis study on the base-catalyzed formation of bioactive oxidized metabolites of 20-hydroxyecdysone. J Pharm Biomed Anal 2017; 146:188-194. [PMID: 28886518 DOI: 10.1016/j.jpba.2017.08.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/09/2017] [Accepted: 08/17/2017] [Indexed: 11/30/2022]
Abstract
A novel capillary electrophoretic method was developed for the analysis and monitoring of the base-catalyzed autoxidation of 20-hydroxyecdysone, a worldwide used non-hormonal anabolic food supplement. An effective separation of the starting material and its bioactive oxidized derivatives was achieved by using sulfobutyl-β-cyclodextrin as selector at pH 11 and by fixing the separation voltage at +30kV. Only a dilution step was inserted before injecting the sample, taken from the crude reaction mixture, to the capillary electrophoresis instrument. The same alkaline pH was used for the analysis as for the reaction, unlike the previously reported HPLC study where sample neutralization was required prior to the measurement. Due to the very short analysis time (6min) in capillary electrophoresis, more frequent sampling and more detailed time scale analysis could be carried out. Furthermore, in contrast with the preceding HPLC results, the previously unobserved calonysterone could also be detected by capillary electrophoresis as a minor primary product. Our novel method demonstrated higher resolution than the one before. Baseline separation could be achieved and the resolution values were in the range of 1.9-7.0. The limit of detection was below 71μg/ml, the relative standard deviation values of the migration time and peak area for intra- and inter-day precision were less than 10%. The more precise, direct monitoring of the time dependency of the oxidation process is expected to have a significant impact on yield optimization initiatives to allow related pharmacological studies in the near future.
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Affiliation(s)
- Halima Meriem Issaadi
- Institute of Pharmacognosy, University of Szeged, Eötvös Str. 6, 6720 Szeged, Hungary
| | - Attila Hunyadi
- Institute of Pharmacognosy, University of Szeged, Eötvös Str. 6, 6720 Szeged, Hungary; Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös Str. 6, 6720 Szeged, Hungary.
| | - Krisztina Németh
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudósok Blv. 2, H-1117 Budapest, Hungary.
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30
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Prochowicz D, Kornowicz A, Lewiński J. Interactions of Native Cyclodextrins with Metal Ions and Inorganic Nanoparticles: Fertile Landscape for Chemistry and Materials Science. Chem Rev 2017; 117:13461-13501. [DOI: 10.1021/acs.chemrev.7b00231] [Citation(s) in RCA: 188] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Daniel Prochowicz
- Institute of Physical
Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Arkadiusz Kornowicz
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Janusz Lewiński
- Institute of Physical
Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
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31
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Liu Y, Wang W, Jia M, Liu R, Liu Q, Xiao H, Li J, Xue Y, Wang Y, Yan C. Recent advances in microscale separation. Electrophoresis 2017; 39:8-33. [DOI: 10.1002/elps.201700271] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 08/03/2017] [Accepted: 08/04/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Yuanyuan Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Weiwei Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Mengqi Jia
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Rangdong Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Qing Liu
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Han Xiao
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Jing Li
- Unimicro (shanghai) Technologies Co., Ltd.; Shanghai P. R. China
| | - Yun Xue
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Yan Wang
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Chao Yan
- School of Pharmacy; Shanghai Jiao Tong University; Shanghai P. R. China
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32
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Daria D, Liudmila K, Gennady E. Highly fluorinated polymers with sulfonate, sulfamide and N
,N
-diethylamino groups for the capillary electromigration separation of proteins and steroid hormones. J Sep Sci 2017; 40:3335-3342. [DOI: 10.1002/jssc.201700283] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/05/2017] [Accepted: 06/06/2017] [Indexed: 01/10/2023]
Affiliation(s)
- Dzema Daria
- Saint Petersburg State University; Institute of chemistry; Saint Petersburg Russia
| | - Kartsova Liudmila
- Saint Petersburg State University; Institute of chemistry; Saint Petersburg Russia
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Yang X, Du Y, Feng Z, Liu Z, Li J. Establishment and molecular modeling study of maltodextrin-based synergistic enantioseparation systems with two new hydroxy acid chiral ionic liquids as additives in capillary electrophoresis. J Chromatogr A 2017. [PMID: 28641834 DOI: 10.1016/j.chroma.2017.06.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Discovering more superior performance of ionic liquids for the separation science has triggered increasing interest. In this work, two new Hydroxy acid-based chiral ionic liquids (CILs) (tertramethylammonium-d-pantothenate (TMA-d-PAN), tertramethylammonium-d-quinate (TMA-d-QUI)) were designed and first used as additives to establish the maltodextrin-based synergistic systems for enantioseparation in capillary electrophoresis (CE). Compared to traditional single maltodextrin chiral separation system, significantly improved separations of all tested drugs in the CIL/Maltodextrin synergistic systems were obtained. Some parameters (CIL concentration, maltodextrin concentration, buffer pH, and applied voltage) in the TMA-d-PAN/Maltodextrin synergistic system have been examined and optimized for analytes. The molecular docking software AutoDock was applied to simulate the recognition process and surmise feasible resolution mechanism in the Maltodextrin/CILs synergistic systems, which has certain guiding value.
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Affiliation(s)
- Xuan Yang
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yingxiang Du
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, PR China; Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
| | - Zijie Feng
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, PR China
| | - Zongran Liu
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, PR China
| | - Jingtang Li
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, PR China
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34
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Zeid AM, Kaji N, Nasr JJM, Belal FF, Baba Y, Walash MI. Stacking-cyclodextrin-microchip electrokinetic chromatographic determination of gabapentinoid drugs in pharmaceutical and biological matrices. J Chromatogr A 2017; 1503:65-75. [DOI: 10.1016/j.chroma.2017.04.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/20/2017] [Accepted: 04/24/2017] [Indexed: 12/25/2022]
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35
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Sázelová P, Koval D, Severa L, Teplý F, Kašička V. Chiral analysis of α-diimine Ru(II) and Fe(II) complexes by capillary electrophoresis using sulfated cyclodextrins as stereoselectors. Electrophoresis 2017; 38:1913-1921. [DOI: 10.1002/elps.201700077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/13/2017] [Accepted: 04/13/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Petra Sázelová
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Prague Czech Republic
| | - Dušan Koval
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Prague Czech Republic
| | - Lukáš Severa
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Prague Czech Republic
| | - Filip Teplý
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Prague Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Prague Czech Republic
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36
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Menéndez-López N, Valimaña-Traverso J, Castro-Puyana M, Salgado A, García MÁ, Marina ML. Enantiomeric separation of the antiuremic drug colchicine by electrokinetic chromatography. Method development and quantitative analysis. J Pharm Biomed Anal 2017; 138:189-196. [DOI: 10.1016/j.jpba.2017.02.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/30/2017] [Accepted: 02/01/2017] [Indexed: 10/20/2022]
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37
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Wahl J, Furuishi T, Yonemochi E, Meinel L, Holzgrabe U. Characterization of complexes between phenethylamine enantiomers and β-cyclodextrin derivatives by capillary electrophoresis-Determination of binding constants and complex mobilities. Electrophoresis 2017; 38:1188-1200. [DOI: 10.1002/elps.201600522] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 01/10/2017] [Accepted: 01/23/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Joachim Wahl
- University of Würzburg; Institute for Pharmacy and Food Chemistry; Würzburg Germany
| | - Takayuki Furuishi
- University of Würzburg; Institute for Pharmacy and Food Chemistry; Würzburg Germany
- Department of Physical Chemistry, Faculty of Pharmaceutical Sciences; Hoshi University; Tokyo Japan
| | - Etsuo Yonemochi
- Department of Physical Chemistry, Faculty of Pharmaceutical Sciences; Hoshi University; Tokyo Japan
| | - Lorenz Meinel
- University of Würzburg; Institute for Pharmacy and Food Chemistry; Würzburg Germany
| | - Ulrike Holzgrabe
- University of Würzburg; Institute for Pharmacy and Food Chemistry; Würzburg Germany
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38
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Michalska K, Gruba E, Bocian W, Cielecka-Piontek J. Enantioselective recognition of radezolid by cyclodextrin modified capillary electrokinetic chromatography and electronic circular dichroism. J Pharm Biomed Anal 2017; 139:98-108. [PMID: 28279932 DOI: 10.1016/j.jpba.2017.01.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 01/18/2017] [Accepted: 01/19/2017] [Indexed: 12/11/2022]
Abstract
A method for the enantioseparation of radezolid (RAD), an analogue of a truly new class of antibacterial agents, oxazolidinones, was developed based on capillary electrokinetic chromatography using a cyclodextrin as a chiral pseudophase (CD-cEKC). The mechanism of RAD separation, together with its precursor, were investigated to directly define the relationship between the oxazolidinone structure and the complexation process. During the development of the method, anionic single isomer cyclodextrins were tested. They were ranked in order from hydrophilic to hydrophobic as follows: heptakis-(2,3-dihydroxy-6-sulfo)-β-cyclodextrin (HS-β-CD), heptakis-(2,3-diacetyl-6-sulfo)-β-cyclodextrin (HDAS-β-CD) and heptakis-(2,3-dimethyl-6-sulfo)-β-cyclodextrin (HDMS-β-CD). Experiments were performed at pH values of 2.5, 6.6, 8.2 and 9.6. The cyclodextrins that had an acetyl or methyl group at the C2 and C3 positions, referred to as HDAS-β-CD and HDMS-β-CD, respectively, exhibited partial and baseline separation of enantiomers in a low pH buffer. However, higher temperatures were required for HDAS-β-CD and acetonitrile addition was required for HDMS-β-CD. During the experiments, different organic solvents, varying in their amphiprotic or aprotic nature, were tested. The best results for the separation of enantiomers using the CD-cEKC method were obtained with 40mM HDMS-β-CD dissolved in a 50mM phosphate buffer (pH 2.5) with the addition of acetonitrile (65:35, v/v) at 27°C, reversed polarity and a voltage equal to 28kV. The apparent binding constants for each enantiomer to HDAS-β-CD or HDMS-β-CD were calculated. Finally, the stereochemistry of (S) and (R)-RAD and the behaviour of selected complex formations were established using electronic circular dichroism.
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Affiliation(s)
- Katarzyna Michalska
- Department of Antibiotics and Microbiology, National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland.
| | - Ewa Gruba
- Department of Antibiotics and Microbiology, National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland
| | - Wojciech Bocian
- Nuclear Magnetic Resonance Laboratory, National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland
| | - Judyta Cielecka-Piontek
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznan, Poland
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39
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Enantiomeric Separation of (R,S)-Aclidinium Bromide with Negatively Charged Gamma-Cyclodextrin by CE. Chromatographia 2017. [DOI: 10.1007/s10337-017-3244-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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40
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Zhou C, Deng J, Shi G, Zhou T. β-cyclodextrin-ionic liquid polymer based dynamically coating for simultaneous determination of tetracyclines by capillary electrophoresis. Electrophoresis 2017; 38:1060-1067. [DOI: 10.1002/elps.201600229] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 11/18/2016] [Accepted: 12/09/2016] [Indexed: 01/18/2023]
Affiliation(s)
- Chunyan Zhou
- School of Ecological and Environmental Sciences; East China Normal University; Shanghai P. R. China
| | - Jingjing Deng
- School of Ecological and Environmental Sciences; East China Normal University; Shanghai P. R. China
| | - Guoyue Shi
- School of Chemistry and Molecular Engineering; East China Normal University; Shanghai P. R. China
| | - Tianshu Zhou
- School of Ecological and Environmental Sciences; East China Normal University; Shanghai P. R. China
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41
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Cheng LY, Fang M, Bai AM, Ouyang Y, Hu YJ. Insights into the interaction of methotrexate and human serum albumin: A spectroscopic and molecular modeling approach. LUMINESCENCE 2017; 32:873-879. [DOI: 10.1002/bio.3267] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/03/2016] [Accepted: 11/16/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Li-Yang Cheng
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Min Fang
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Ai-Min Bai
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Yu Ouyang
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Yan-Jun Hu
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); Wuhan University; Wuhan 430072 People's Republic of China
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42
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Al-Burtomani SKS, Suliman FO. Inclusion complexes of norepinephrine with β-cyclodextrin, 18-crown-6 and cucurbit[7]uril: experimental and molecular dynamics study. RSC Adv 2017. [DOI: 10.1039/c6ra28638k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Binary and ternary complexes of norepinephrine with 18C6, βCD and CB7 have been characterized using various experimental and theoretical techniques.
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43
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Masuya-Suzuki A, Hayashi T, Tamura K, Iki N. Capillary electrophoretic separation of cis/trans isomers of bis(o-diiminobenzoquinonato)platinum(ii) complexes using β-cyclodextrins as the selector. NEW J CHEM 2017. [DOI: 10.1039/c7nj01558e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Capillary electrophoresis was employed to successfully resolve the cis/trans isomers of PtII-diradical complexes using β-cyclodextrins as the selector, allowing for the estimation of the inclusion constant and the representation of the inclusion complex through mobility.
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Affiliation(s)
| | - Takumi Hayashi
- Graduate School of Environmental Studies
- Tohoku University
- Sendai 980-8579
- Japan
| | - Kosaku Tamura
- Graduate School of Environmental Studies
- Tohoku University
- Sendai 980-8579
- Japan
| | - Nobuhiko Iki
- Graduate School of Environmental Studies
- Tohoku University
- Sendai 980-8579
- Japan
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44
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Recent advances on the use of cyclodextrins in the chiral analysis of drugs by capillary electrophoresis. J Chromatogr A 2016; 1467:79-94. [DOI: 10.1016/j.chroma.2016.08.029] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 07/29/2016] [Accepted: 08/11/2016] [Indexed: 11/19/2022]
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45
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Guo J, Xiao Y, Lin Y, Crommen J, Jiang Z. Effect of the crosslinker type on the enantioseparation performance of β -cyclodextrin functionalized monoliths prepared by the one-pot approach. J Chromatogr A 2016; 1467:288-296. [DOI: 10.1016/j.chroma.2016.05.078] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 05/18/2016] [Accepted: 05/24/2016] [Indexed: 01/03/2023]
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46
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Single-isomer carboxymethyl-γ-cyclodextrin as chiral resolving agent for capillary electrophoresis. J Chromatogr A 2016; 1467:445-453. [DOI: 10.1016/j.chroma.2016.06.083] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/28/2016] [Accepted: 06/30/2016] [Indexed: 01/24/2023]
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47
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Fraňo M, Džuganová K, Koiš P, Masár M. DNA fragment separations by on-line combination of capillary isotachophoresis-capillary zone electrophoresis with UV detection. Electrophoresis 2016; 37:3084-3088. [DOI: 10.1002/elps.201600336] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 08/20/2016] [Accepted: 08/23/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Milan Fraňo
- Department of Molecular Biology, Faculty of Natural Sciences; Comenius University in Bratislava; Bratislava Slovakia
| | - Katarína Džuganová
- Department of Analytical Chemistry, Faculty of Natural Sciences; Comenius University in Bratislava; Bratislava Slovakia
| | - Pavol Koiš
- Department of Organic Chemistry, Faculty of Natural Sciences; Comenius University in Bratislava; Bratislava Slovakia
| | - Marián Masár
- Department of Analytical Chemistry, Faculty of Natural Sciences; Comenius University in Bratislava; Bratislava Slovakia
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48
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Advances in the Use of Cyclodextrins as Chiral Selectors in Capillary Electrokinetic Chromatography: Fundamentals and Applications. Chromatographia 2016. [DOI: 10.1007/s10337-016-3167-0] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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49
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Růžička M, Koval D, Vávra J, Reyes-Gutiérrez PE, Teplý F, Kašička V. Interactions of helquats with chiral acidic aromatic analytes investigated by partial-filling affinity capillary electrophoresis. J Chromatogr A 2016; 1467:417-426. [PMID: 27578406 DOI: 10.1016/j.chroma.2016.08.053] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 08/20/2016] [Accepted: 08/24/2016] [Indexed: 01/18/2023]
Abstract
Noncovalent molecular interactions between helquats, a new class of dicationic helical extended diquats, and several chiral acidic aromatic drugs and catalysts have been investigated using partial-filling affinity capillary electrophoresis (PF-ACE). Helquats dissolved at 1mM concentration in the aqueous background electrolyte (40mM Tris, 20mM acetic acid, pH 8.1) were introduced as ligand zones of variable length (0-130mm) into the hydroxypropylcellulose coated fused silica capillary whereas 0.1mM solutions of negatively charged chiral drugs or catalysts (warfarin, ibuprofen, mandelic acid, etodolac, binaphthyl phosphate and 11 other acidic aromatic compounds) were applied as a short analyte zone at the injection capillary end. After application of electric field, analyte and ligand migrated against each other and in case of their interactions, migration time of the analyte was increasing with increasing length of the ligand zone. From the tested compounds, only isomers of those exhibiting helical chirality and/or possessing conjugated aromatic systems were enantioselectively separated through their differential interactions with helquats. Some compounds with conjugated aromatic groups interacted with helquats moderately strongly but non-enantiospecifically. Small compounds with single benzene ring exhibited no or very weak non-enantiospecific interactions. PF-ACE method allowed to determine binding constants of the analyte-helquat complexes from the changes of migration times of the analytes. Binding constants of the weakest complexes of the analytes with helquats were less than 50L/mol, whereas binding constants of the strongest complexes were in the range 1 000-1 400L/mol.
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Affiliation(s)
- Martin Růžička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám., 542/2, 166 10 Prague 6, Czech Republic; Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Dušan Koval
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám., 542/2, 166 10 Prague 6, Czech Republic
| | - Jan Vávra
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám., 542/2, 166 10 Prague 6, Czech Republic
| | - Paul E Reyes-Gutiérrez
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám., 542/2, 166 10 Prague 6, Czech Republic
| | - Filip Teplý
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám., 542/2, 166 10 Prague 6, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám., 542/2, 166 10 Prague 6, Czech Republic.
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50
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Flor S, Huala Juan M, Tripodi V, Lucangioli S. Development of an enantioselective capillary electrophoretic method for the simultaneous determination of montelukast enantiomeric and diastereoisomeric forms and its main degradation product. Electrophoresis 2016; 37:2420-8. [PMID: 27524401 DOI: 10.1002/elps.201600191] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 05/27/2016] [Accepted: 06/15/2016] [Indexed: 11/11/2022]
Abstract
A stereoselective CD-MEKC system has been developed for the quality control of Montelukast (MK), commercialized as a pure enantiomer. The proposed method is the first one that allows the simultaneous determination of MK, its enantiomeric form, diasteroisomers and its main degradation compound (MK sulphoxide). CD-MEKC system is composed of 10 mM SDS, 10 mM sulfobutylether-β-CD, 10 mM TM-β-CD, and 20 mM borate buffer at pH 9.0. Combination of these two CDs allows high baseline enantioresolution between MK and its enantiomeric impurity, but also, between the diasteroisomeric forms. Moreover, a multivariate design was applied to optimize operational parameters. The method was designed to meet with requirements of the official pharmacopoeias and fully validated according to international guidelines. Linearity of MK was demonstrated in the range from 10.0 to 100.0 μg/mL (r(2) = 0.9908) with a LOD and LOQ of 0.30 and 0.90 μg/mL, respectively. Intra and interday precision were evaluated and RSD values were below 2%, and also, accuracy expressed as percentage of recovery was in a range from 99.0 to 101.9 for the three assayed levels. The method allows determining 0.02% w/w of the enantiomeric and diasteroisomeric impurities, and 0.01% w/w of MK sulphoxide. Robustness was evaluated by a Plackett and Burman design. Finally, the CD-MEKC system was successfully applied to the determination of related substances in MK bulk drug and its quantification in two pediatric pharmaceutical dosage forms.
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Affiliation(s)
- Sabrina Flor
- Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Martin Huala Juan
- Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina
| | - Valeria Tripodi
- Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Silvia Lucangioli
- Department of Pharmaceutical Technology, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Buenos Aires, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.
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