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Štěpánová S, Kašička V. Determination of physicochemical parameters of (bio)molecules and (bio)particles by capillary electromigration methods. J Sep Sci 2024; 47:e2400174. [PMID: 38867483 DOI: 10.1002/jssc.202400174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/03/2024] [Accepted: 05/10/2024] [Indexed: 06/14/2024]
Abstract
The review provides an overview of recent developments and applications of capillary electromigration (CE) methods for the determination of important physicochemical parameters of various (bio)molecules and (bio)particles. These parameters include actual and limiting (absolute) ionic mobilities, effective electrophoretic mobilities, effective charges, isoelectric points, electrokinetic potentials, hydrodynamic radii, diffusion coefficients, relative molecular masses, acidity (ionization) constants, binding constants and stoichiometry of (bio)molecular complexes, changes of Gibbs free energy, enthalpy and entropy and rate constants of chemical reactions and interactions, retention factors and partition and distribution coefficients. For the determination of these parameters, the following CE methods are employed: zone electrophoresis in a free solution or in sieving media, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography. In the individual sections, the procedures for the determination of the above parameters by the particular CE methods are described.
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Affiliation(s)
- Sille Štěpánová
- Electromigration methods, Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
| | - Václav Kašička
- Electromigration methods, Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
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2
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Štěpánová S, Břehová P, Kašička V. The separation of cyclic diadenosine diphosphorothioate and the diastereomers of its difluorinated derivative and the estimation of the binding constants and ionic mobilities of their complexes with 2-hydroxypropyl-β-cyclodextrin by affinity capillary electrophoresis. Electrophoresis 2024; 45:1000-1009. [PMID: 38195812 DOI: 10.1002/elps.202300191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/31/2023] [Accepted: 12/31/2023] [Indexed: 01/11/2024]
Abstract
The incorporation of phosphorothioate linkages has recently been extensively employed in therapeutic oligonucleotides. For their separation and quality control, new high-efficient and high-sensitive analytical methods are needed. In this work, a new affinity capillary electrophoresis method has been developed and applied for the separation of a potential anticancer drug, 2',3'-cyclic diadenosine diphosphorothioate (Rp, Rp) (ADU-S100), and three recently newly synthesized diastereomers of its difluorinated derivative, 3',3'-cyclic di(2'-fluoro, 2'-deoxyadenosine phosphorothioate). The separation was performed in the various background electrolytes (BGEs) within a pH range 5-9 using several native and derivatized cyclodextrins (CDs) as chiral additives of the BGE. Relatively good separations were obtained with β-, γ-, and 2-hydroxypropyl-γ-CDs in some of the BGEs tested. However, the best separation was achieved using the 2-hydroxypropyl-β-CD chiral selector at 43.5 mM average concentration in the BGE composed of 40 mM Tris, 40 mM tricine, pH 8.1. Under these conditions, all the previous four cyclic dinucleotides (CDNs) were baseline separated within 4 min. Additionally, the average apparent binding constants and the average actual ionic mobilities of the complexes of all four CDNs with 2-hydroxypropyl-β-CD in the above BGE were determined. The formed complexes were found to be relatively weak, with the average apparent binding constants in the range of 12.2-94.1 L mol-1 and with the actual ionic mobilities spanning the interval (-7.8 to -12.7) × 10-9 m2 V-1 s-1. The developed method can be applied for the separation, analysis, and characterization of the above and similar CDNs.
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Affiliation(s)
- Sille Štěpánová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
| | - Petra Břehová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
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3
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2021-mid-2023). Electrophoresis 2024; 45:165-198. [PMID: 37670208 DOI: 10.1002/elps.202300152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/22/2023] [Accepted: 08/22/2023] [Indexed: 09/07/2023]
Abstract
This review article brings a comprehensive survey of developments and applications of high-performance capillary and microchip electromigration methods (zone electrophoresis in a free solution or in sieving media, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) for analysis, micropreparation, and physicochemical characterization of peptides in the period from 2021 up to ca. the middle of 2023. Progress in the study of electromigration properties of peptides and various aspects of their analysis, such as sample preparation, adsorption suppression, electroosmotic flow regulation, and detection, are presented. New developments in the particular capillary electromigration methods are demonstrated, and several types of their applications are reported. They cover qualitative and quantitative analysis of synthetic or isolated peptides and determination of peptides in complex biomatrices, peptide profiling of biofluids and tissues, and monitoring of chemical and enzymatic reactions and physicochemical changes of peptides. They include also amino acid and sequence analysis of peptides, peptide mapping of proteins, separation of stereoisomers of peptides, and their chiral analyses. In addition, micropreparative separations and physicochemical characterization of peptides and their interactions with other (bio)molecules by the above CE methods are described.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
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4
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Kalaycıoğlu Z. The affinity of histamine to serum albumin: Capillary electrophoresis-frontal analysis and in-silico molecular docking approaches. J Sep Sci 2023; 46:e2300391. [PMID: 37688351 DOI: 10.1002/jssc.202300391] [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: 05/31/2023] [Revised: 08/27/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023]
Abstract
Histamine is a biogenic amine found in various body tissues and responsible for many critical vital activities. It is also responsible for allergic reactions in the body. Ingestion of foods containing high amounts of histamine can cause fatal allergic reactions. Albumin in plasma controls drugs and free concentrations of bioactive constituents taken to the body with food. Hence, this study aimed to characterise the interactions of histamine with bovine serum albumin. Capillary electrophoresis in the frontal analysis mode was employed in this study as a practical approach for assessing histamine-bovine serum albumin affinity. The plateau-shaped free histamine peak was well separated from the bovine serum albumin (BSA)-histamine complex peak. The free histamine concentration was obtained by following the height of the free histamine peak. Whereas the bound histamine concentrations were obtained by calculating the difference between the height of total and free histamine peaks. Histamine bound to BSA at one independent site with a Kb value of 2.50 × 103 L/mol. Moreover, an in-silico molecular docking method was performed, and it was revealed that the binding site of histamine was located closer to Lysine-131 in subdomain IIA of bovine serum albumin.
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Hu X, Zhou J, Li J, Gao W, Zhou J, Yu J, Tang K. An improved algorithm for resolving overlapping peaks in ion mobility spectrometry and its application to the separation of glycan isomers. Analyst 2023; 148:5514-5524. [PMID: 37791632 DOI: 10.1039/d3an01042b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Despite the popularity of ion mobility spectrometry (IMS) for glycan analysis, its limited structural resolution hinders the effective separation of many glycan isomers. This leads to the overlap of IMS peaks, consequently impacting the accurate identification of glycan compositions. To this end, an improved algorithm, namely second-order differentiation combined with a simulated annealing particle swarm optimization algorithm based on sine adaptive weights (DWSA-PSO), was proposed for the separation of overlapping IMS peaks formed by glycan isomers. DWSA-PSO first performed second-order differentiation to automatically determine the number of components in overlapping peaks and exclude impossible single-peak combinations. It then introduced sinusoidal adaptive weights and a simulated annealing mechanism to improve the algorithm's search capability and global optimization performance, thereby enabling accurate and efficient separation of individual peaks. To evaluate the performance of DWSA-PSO and its application to the separation of glycan isomers, multiple sets of overlapping peaks with different degrees of overlap were simulated, and various types of multi-component overlapping peaks were formed using six disaccharide and four trisaccharide isomers. The experimental results consistently demonstrated that the DWSA-PSO algorithm outperformed both the improved particle swarm optimization (IPSO) algorithm and the dynamic inertia weight particle swarm optimization (DIWPSO) algorithm in terms of separation accuracy, running time, and fitness values. In addition, the DWSA-PSO algorithm was successfully applied to the separation of glycan isomers in malt milk beverage. All these results reveal the capability of the DWSA-PSO algorithm to facilitate the accurate identification of glycan isomers.
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Affiliation(s)
- Xiangyang Hu
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, P. R. China.
- Zhejiang Engineering Research Center of Advanced Mass Spectrometry and Clinical Application, Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, P. R. China.
| | - Junfei Zhou
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, P. R. China.
- Zhejiang Engineering Research Center of Advanced Mass Spectrometry and Clinical Application, Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, P. R. China.
| | - Junhui Li
- Zhejiang Engineering Research Center of Advanced Mass Spectrometry and Clinical Application, Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, P. R. China.
- Ningbo Zhenhai Institute of Mass Spectrometry, Ningbo, P.R. China
| | - Wenqing Gao
- Zhejiang Engineering Research Center of Advanced Mass Spectrometry and Clinical Application, Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, P. R. China.
- Ningbo Zhenhai Institute of Mass Spectrometry, Ningbo, P.R. China
| | - Jun Zhou
- Zhejiang Ningbo Ecological and Environmental Monitoring Center, Ningbo, P.R. China.
| | - Jiancheng Yu
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, P. R. China.
- Zhejiang Engineering Research Center of Advanced Mass Spectrometry and Clinical Application, Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, P. R. China.
- Ningbo Zhenhai Institute of Mass Spectrometry, Ningbo, P.R. China
| | - Keqi Tang
- Zhejiang Engineering Research Center of Advanced Mass Spectrometry and Clinical Application, Institute of Mass Spectrometry, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, P. R. China.
- Ningbo Zhenhai Institute of Mass Spectrometry, Ningbo, P.R. China
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Han C, Wang Q, Yao Y, Zhang Q, Huang J, Zhang H, Qu L. Thin layer chromatography coupled with surface enhanced Raman scattering for rapid separation and on-site detection of multi-components. J Chromatogr A 2023; 1706:464217. [PMID: 37517317 DOI: 10.1016/j.chroma.2023.464217] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 08/01/2023]
Abstract
The separation and detection of multi-component mixtures has always been a challenging task. Traditional detection methods often suffer from complex operation, high cost, and low sensitivity. Surface enhanced Raman scattering (SERS) technique is a high sensitivity, powerful and rapid detection tool, which can realize the specific detection of single substance components, but it must solve the problem that multi-component mixtures cannot be accurately determined. Thin layer chromatography (TLC) technology, as a high-throughput separation technology, uses chromatographic plate as the stationary phase, and could select different developing phases for separation experiments. The advantages of TLC technology in short distance and rapid separation are widely used in protein, dye and biomedical fields. However, TLC technology has limitations in detection ability and difficulty in obtaining ideal signal intensity. The combination of TLC technology and SERS technology made the operation procedure simple and the sample size small, which can achieve rapid on-site separation and quantitative detection of mixtures. Due to the rapid development of TLC-SERS technology, it has been widely used in the investigation of various complex systems. This paper reviews the application of TLC-SERS technology in food science, environmental pollution and biomedicine.
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Affiliation(s)
- Caiqin Han
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
| | - Qin Wang
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Yue Yao
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Qian Zhang
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Jiawei Huang
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Hengchang Zhang
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
| | - Lulu Qu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China.
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Sharmeen S, Kyei I, Hatch A, Hage DS. Analysis of drug interactions with serum proteins and related binding agents by affinity capillary electrophoresis: A review. Electrophoresis 2022; 43:2302-2323. [PMID: 36250426 PMCID: PMC10098505 DOI: 10.1002/elps.202200191] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 09/17/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022]
Abstract
Biomolecules such as serum proteins can interact with drugs in the body and influence their pharmaceutical effects. Specific and precise methods that analyze these interactions are critical for drug development or monitoring and for diagnostic purposes. Affinity capillary electrophoresis (ACE) is one technique that can be used to examine the binding between drugs and serum proteins, or other agents found in serum or blood. This article will review the basic principles of ACE, along with related affinity-based capillary electrophoresis (CE) methods, and examine recent developments that have occurred in this field as related to the characterization of drug-protein interactions. An overview will be given of the various formats that can be used in ACE and CE for such work, including the relative advantages or weaknesses of each approach. Various applications of ACE and affinity-based CE methods for the analysis of drug interactions with serum proteins and other binding agents will also be presented. Applications of ACE and related techniques that will be discussed include drug interaction studies with serum agents, chiral drug separations employing serum proteins, and the use of CE in hybrid methods to characterize drug binding with serum proteins.
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Affiliation(s)
- Sadia Sharmeen
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Isaac Kyei
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Arden Hatch
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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8
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TAKAYANAGI T. Development of Novel Analysis and Characterization Methods Utilizing Reaction Dynamics in a Separation Capillary. CHROMATOGRAPHY 2022. [DOI: 10.15583/jpchrom.2021.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Toshio TAKAYANAGI
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University
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9
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2019-mid 2021). Electrophoresis 2021; 43:82-108. [PMID: 34632606 DOI: 10.1002/elps.202100243] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 12/19/2022]
Abstract
The review provides a comprehensive overview of developments and applications of high performance capillary and microchip electroseparation methods (zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) for analysis, microscale isolation, and physicochemical characterization of peptides from 2019 up to approximately the middle of 2021. Advances in the investigation of electromigration properties of peptides and in the methodology of their analysis, such as sample preparation, sorption suppression, EOF control, and detection, are presented. New developments in the individual CE and CEC methods are demonstrated and several types of their applications are shown. They include qualitative and quantitative analysis, determination in complex biomatrices, monitoring of chemical and enzymatic reactions and physicochemical changes, amino acid, sequence, and chiral analyses, and peptide mapping of proteins. In addition, micropreparative separations and determination of significant physicochemical parameters of peptides by CE and CEC methods are described.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague 6, Czechia
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10
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Sursyakova VV, Rubaylo AI. Boundary values of binding constants determined by affinity capillary electrophoresis. J Sep Sci 2021; 44:4200-4203. [PMID: 34510741 DOI: 10.1002/jssc.202100507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/14/2021] [Accepted: 09/08/2021] [Indexed: 11/08/2022]
Abstract
This study shows that the upper limit of binding (stability) constants determined by mobility shift affinity capillary electrophoresis can be increased from 104 to 106 -109 L/mol if the lowest possible analyte concentration in samples is used (for example, the concentration that gives electrophoretic peaks with a signal-to-noise ratio of 10) and the effective electrophoretic mobility of the analyte is calculated via the parameter a1 of the Haarhoff-Van der Linde function. The equation to calculate the boundary values of binding constants for 1:1 complexes was derived for the case when the constants cannot be calculated in the usual way. These values are obtained from the inequality: the difference between the ionic mobility of the analyte-ligand complex and the effective electrophoretic mobility of the analyte determined at the lowest ligand concentration in the background electrolyte at which the analyte appears as an undistorted peak in electropherograms is less than or equal to the absolute error in mobility measurements. The application of the equation was illustrated by the example of electrophoretic data for a complex between betulin 3,28-diphthalate and (2-hydroxypropyl)-γ-cyclodextrin. An algorithm to determine the binding constants for strong complexation by mobility shift affinity capillary electrophoresis was suggested.
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Affiliation(s)
- Viktoria V Sursyakova
- Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia
| | - Anatoly I Rubaylo
- Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia.,School of Non-Ferrous Metals and Material Science, Siberian Federal University, Krasnoyarsk, Russia.,Federal Research Center "Krasnoyarsk Science Center SB RAS", Krasnoyarsk, Russia
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Čokrtová K, Křížek T, Kubíčková A, Coufal P. Effect of background electrolyte anions on markers of electroosmotic flow in capillary electrophoresis. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02810-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Martínková E, Křížek T, Kubíčková A, Coufal P. Mobilization of electroosmotic flow markers in capillary zone electrophoresis. Electrophoresis 2021; 42:932-938. [PMID: 33570209 DOI: 10.1002/elps.202000301] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 02/05/2021] [Accepted: 02/05/2021] [Indexed: 11/11/2022]
Abstract
UV-absorbing neutral substances are commonly used as markers of mean electroosmotic flow in capillary electrophoresis for their zero electrophoretic mobility in an electric field. However, some of these markers can interact with background electrolyte components and migrate at a different velocity than the electroosmotic flow. Thus, we tested 11 markers primarily varying in their degree of methylation and type of central atom in combination with five background electrolyte cations differing in their ionic radii and surface charge density, measuring the relative electrophoretic mobility using thiourea as a reference marker. Our results from this set of experiments showed some general trends in the mobilization of the markers based on the effects of marker structure and type of background electrolyte cation on the relative electrophoretic mobility. As an example, the effects of an inadequate choice of marker on analyte identification were illustrated in the electrophoretic separation of glucosinolates. Therefore, our findings may help electrophoretists appropriately select electroosmotic flow markers for various electrophoretic systems.
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Affiliation(s)
- Eva Martínková
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Tomáš Křížek
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Anna Kubíčková
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Pavel Coufal
- Department of Analytical Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
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Yuan Z, Xu P, Yu F, Zhang D, Zhao Q, Yu W, Wang H. An electroosmotic flow-free two-direction migration strategy enables fast affinity capillary electrophoresis to study the weak interactions between basic peptides and RNA. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:5833-5838. [PMID: 33227112 DOI: 10.1039/d0ay01515f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Affinity Capillary Electrophoresis (ACE) is a useful analytical tool to study noncovalent interactions. However, it remains challenging for ACE to measure weak and unstable interactions due to the fast dissociation of the binding complex and the possible destruction of the complex by a high electric field. In this study, we proposed a two-direction migration strategy that enables ACE to detect weak and unstable but important interactions by decreasing the migration distance of the binding complex and controlling the opposite migration direction of the free probe. By synthesizing a polyacrylamide-coated neutral capillary, free of electroosmotic flow, two-direction CE migration of basic peptides (positively charged) and peptide-RNA complexes (negatively charged) was achieved. Furthermore, the weak interactions between small nuclear U2 RNA and histone peptides were detected by this two-direction migration CE approach. The effects of the methylation states of histone peptides on the weak peptide-RNA interactions were also explored by this new approach. Collectively, the suggested modification of the ACE method is able to qualitatively characterize weak interactions.
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Affiliation(s)
- Zheng Yuan
- The State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Characterization of AMBN I and II Isoforms and Study of Their Ca 2+-Binding Properties. Int J Mol Sci 2020; 21:ijms21239293. [PMID: 33291486 PMCID: PMC7730623 DOI: 10.3390/ijms21239293] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 01/29/2023] Open
Abstract
Ameloblastin (Ambn) as an intrinsically disordered protein (IDP) stands for an important role in the formation of enamel—the hardest biomineralized tissue commonly formed in vertebrates. The human ameloblastin (AMBN) is expressed in two isoforms: full-length isoform I (AMBN ISO I) and isoform II (AMBN ISO II), which is about 15 amino acid residues shorter than AMBN ISO I. The significant feature of AMBN—its oligomerization ability—is enabled due to a specific sequence encoded by exon 5 present at the N-terminal part in both known isoforms. In this study, we characterized AMBN ISO I and AMBN ISO II by biochemical and biophysical methods to determine their common features and differences. We confirmed that both AMBN ISO I and AMBN ISO II form oligomers in in vitro conditions. Due to an important role of AMBN in biomineralization, we further addressed the calcium (Ca2+)-binding properties of AMBN ISO I and ISO II. The binding properties of AMBN to Ca2+ may explain the role of AMBN in biomineralization and more generally in Ca2+ homeostasis processes.
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Michalcová L, Nevídalová H, Glatz Z. Toward an automated workflow for the study of plasma protein-drug interactions based on capillary electrophoresis-frontal analysis combined with in-capillary mixing of interacting partners. J Chromatogr A 2020; 1635:461734. [PMID: 33264700 DOI: 10.1016/j.chroma.2020.461734] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 11/06/2020] [Accepted: 11/12/2020] [Indexed: 12/15/2022]
Abstract
Capillary electrophoresis-frontal analysis (CE-FA) together with mobility shift affinity CE is the most frequently used mode of affinity CE for a study of plasma protein-drug interactions, which is a substantial part of the early stage of drug discovery. Whereas in the classic CE-FA setup the sample is prepared by off-line mixing of the interaction partners in the sample vial outside the CE instrument and after a short incubation period loaded into the capillary and analysed, in this work a new methodological approach has been developed that combines CE-FA with the mixing of interacting partners directly inside the capillary. This combination gives rise to a fully automated and versatile methodology for the characterization of these binding interactions besides a substantial reduction in the amounts of sample compounds used. The minimization of possible experimental errors due to the full involving of sophisticated CE instrument in the injection procedure, mixing and separation instead of manual manipulation is another fundamental benefit. The in-capillary mixing is based on the transverse diffusion of laminar flow profile methodology introduced by Krylov et al. using its multi-zone injection modification presented by Řemínek at al.. Actually, after the method optimization, the alternate introduction of six plugs of drug and six plugs of bovine serum protein in BGE, each injected for 3 s at a pressure of -10 mbar (-1 kPa) into the capillary filled by BGE, was found to be the best injection procedure. The method repeatability calculated as RSDs of plateau highs of bovine serum albumin and propranolol as model sample compounds were better than 3.44 %. Its applicability was finally demonstrated on the determination of apparent binding parameters of bovine serum albumin for basic drugs propranolol and lidocaine and acid drug phenylbutazone. The values obtained by a new on-line CE-FA methodology are in agreement with values estimated by classic off-line CE-FA, as well as with literature data obtained using different techniques.
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Affiliation(s)
- Lenka Michalcová
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Hana Nevídalová
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Zdeněk Glatz
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic.
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Nevídalová H, Michalcová L, Glatz Z. Applicability of capillary electrophoresis-frontal analysis for displacement studies: Effect of several drugs on l-tryptophan and lidocaine binding to human serum albumin. J Sep Sci 2020; 43:4225-4233. [PMID: 32966669 DOI: 10.1002/jssc.202000594] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/27/2020] [Accepted: 09/17/2020] [Indexed: 01/30/2023]
Abstract
The effective concentration of a drug in the blood, i.e. the concentration of a free drug in the blood, is influenced by the strength of drug binding onto plasma proteins. Besides its efficacy, these interactions subsequently influence the liberation, absorption, distribution, metabolism, excretion, and toxicological properties of the drug. It is important to not only determine the binding strength and stoichiometry, but also the binding site of a drug on the plasma protein molecule, because the co-administration of drugs with the same binding site can affect the above-mentioned concentration and as a result the pharmacological behavior of the drugs and lead to side effects caused by the change in free drug concentration, its toxicity. In this study, the binding characteristics of six drugs with human serum albumin, the most abundant protein in human plasma, were determined by capillary electrophoresis-frontal analysis, and the obtained values of binding parameters were compared with the literature data. The effect of several drugs and site markers on the binding of l-tryptophan and lidocaine to human serum albumin was investigated in subsequent displacement studies which thus demonstrated the usability of capillary electrophoresis as an automated high-throughput screening method for drug-protein binding studies.
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Affiliation(s)
- Hana Nevídalová
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lenka Michalcová
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Zdeněk Glatz
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
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17
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Ratih R, Wätzig H, Stein M, El Deeb S. Investigation of the enantioselective interaction between selected drug enantiomers and human serum albumin by mobility shift-affinity capillary electrophoresis. J Sep Sci 2020; 43:3960-3968. [PMID: 32823373 DOI: 10.1002/jssc.202000372] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 08/14/2020] [Accepted: 08/15/2020] [Indexed: 12/26/2022]
Abstract
Mobility shift-affinity capillary electrophoresis was employed for enantioseparation and simultaneous binding constant determination. Human serum albumin was used as a chiral selector in the background electrolyte composed of 20 mM phosphate buffer, pH 7.4. The applied setup supports a high mobility shift since albumin and the drug-albumin complex hold negative net charges, while model compounds of amlodipine and verapamil are positively charged. In order to have an accurate effective mobility determination, the Haarhoff-van der Linde function was utilized. Subsequently, the association constant was determined by nonlinear regression analysis of the dependence of effective mobilities on the total protein concentration. Differences in the apparent binding status between the enantiomers lead to mobility shifts of different extends (α). This resulted in enantioresolutions of Rs = 1.05-3.63 for both drug models. R-(+)-Verapamil (KA 1844 M-1 ) proved to bind stronger to human serum albumin compared to S-(-)-verapamil (KA 6.6 M-1 ). The association constant of S-(-)-amlodipine (KA 25 073 M-1 ) was found to be slightly higher compared to its antipode (KA 22 620 M-1 ) when applying the racemic mixture. The low measurement uncertainty of this approach was demonstrated by the close agreement of the association constant of the enantiopure S-(-)-form (KA 25 101 M-1 ).
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Affiliation(s)
- Ratih Ratih
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany.,Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Surabaya, Surabaya, Indonesia
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Matthias Stein
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
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18
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Sladkov V, Roques J, Meyer M. Assignment of complex species by affinity capillary electrophoresis: The case of Th(IV)-desferrioxamine B. Electrophoresis 2020; 41:1870-1877. [PMID: 32543780 DOI: 10.1002/elps.202000114] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/08/2020] [Accepted: 06/13/2020] [Indexed: 12/11/2022]
Abstract
The electrophoretic mobility change of desferrioxamine B (DFO) was monitored by UV absorption spectrophotometry upon increasing the thorium(IV) concentration in the background electrolyte at two acidities ([HClO4 ]Tot = 0.0316 and 0.0100 M). These data enabled to assess the speciation model and to determine the equilibrium constant of [Th(DFO)H2 ]3+ at fixed ionic strength (I = 0.1 M (H,Na)ClO4 ). Affinity capillary electrophoresis (ACE) turned out to be most helpful in identifying the complexed species by ascertaining its charge and protonation state. The assignment of the correct stoichiometry relied on the reliable estimation of the electrophoretic mobility by assuming similar hydrodynamic radii for (DFO)H4 + and the chelate. The value of the apparent equilibrium constant (log β112 = 38.7 ± 0.4) obtained by ACE compares favorably well with those reported in the literature for thorium and a range of other metal ions, according to a linear free-energy relationship. This method is useful for studying metal-ligand binding equilibria and provides valuable information for further modelling the behavior of tetravalent actinides under environmental conditions. Structural information about the prevalent solution species in acidic conditions was gained by DFT calculations, confirming the bishydroxamato coordination mode of Th4+ by the diprotonated ligand.
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Affiliation(s)
- Vladimir Sladkov
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France
| | - Jérôme Roques
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France
| | - Michel Meyer
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302, CNRS, Université Bourgogne-Franche-Comté, 9 Avenue Alain Savary, BP 47870, 21078, Dijon, Cedex, France
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19
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Yang J, Zhao S, Zhao D, Huang Y, Liu X, Hu W, Liu B. A capillary electrophoresis strategy to sensitively detect dynamic properties of coiled coil polypeptides. J Sep Sci 2020; 43:2201-2208. [DOI: 10.1002/jssc.202000137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 02/25/2020] [Accepted: 02/25/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Jie Yang
- Innovation Institute for Biomedical Materials, College of Life Science and ChemistryWuhan Donghu University Wuhan P. R. China
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics‐Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and TechnologyHuazhong University of Science and Technology Wuhan P. R. China
| | - Sun‐Duo Zhao
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics‐Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and TechnologyHuazhong University of Science and Technology Wuhan P. R. China
| | - Dong‐Hui Zhao
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics‐Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and TechnologyHuazhong University of Science and Technology Wuhan P. R. China
| | - Yan Huang
- Innovation Institute for Biomedical Materials, College of Life Science and ChemistryWuhan Donghu University Wuhan P. R. China
| | - Xiao‐Xia Liu
- Innovation Institute for Biomedical Materials, College of Life Science and ChemistryWuhan Donghu University Wuhan P. R. China
| | - Wei Hu
- Innovation Institute for Biomedical Materials, College of Life Science and ChemistryWuhan Donghu University Wuhan P. R. China
| | - Bo Liu
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics‐Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and TechnologyHuazhong University of Science and Technology Wuhan P. R. China
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20
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Takayanagi T, Mine M, Mizuguchi H. Capillary Electrophoresis/Dynamic Frontal Analysis for the Enzyme Assay of 4-Nitrophenyl Phosphate with Alkaline Phosphatase. ANAL SCI 2020; 36:829-834. [PMID: 31956161 DOI: 10.2116/analsci.19p471] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A substrate of 4-nitrophenyl phosphate was enzymatically hydrolyzed by alkaline phosphatase (ALP) in a capillary tube, while an injected zone of the substrate was electrophoretically migrating in the separation buffer containing the enzyme by capillary electrophoresis (CE). During CE migration of the substrate from the start time of the electrophoresis to the detection time of the substrate, the substrate was continuously hydrolyzed by ALP to form a product of 4-nitrophenolate, and a plateau signal of 4-nitrophenolate was detected as a result of the zero-order kinetic reaction. The height of the plateau signal was directly related to the reaction rate, and it was used for the determination of a Michaelis-Menten constant through Lineweaver-Burk plots. Since the plateau signal is attributed to the dynamic formation of the product by the enzymatic reaction in CE, this analysis method is named as capillary electrophoresis/dynamic frontal analysis (CE/DFA). In CE/DFA, the CE separation is included on detecting the plateau signal, and the hydrolysis product before the sample injection is resolved from the dynamically and continuously formed product. The inhibition of the enzyme with the product is also eliminated in CE/DFA by the CE separation.
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Affiliation(s)
- Toshio Takayanagi
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University
| | - Masanori Mine
- Graduate School of Advanced Technology and Science, Tokushima University
| | - Hitoshi Mizuguchi
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University
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21
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Sasaki Y, Sato Y, Takahashi T, Umetsu M, Iki N. Capillary electrophoretic reactor for estimation of spontaneous dissociation rate of Trypsin-Aprotinin complex. Anal Biochem 2019; 585:113406. [PMID: 31445899 DOI: 10.1016/j.ab.2019.113406] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/19/2019] [Accepted: 08/21/2019] [Indexed: 11/25/2022]
Abstract
A capillary electrophoretic reactor was used to analyze the dissociation kinetics of an enzyme-inhibitor complex in a homogeneous solution without immobilization. The complex consisting of trypsin (Try) and aprotinin (Apr) was used as the model. Capillary electrophoresis provided a reaction field for Try-Apr complex to dissociate through the steady removal of free Try and Apr from the Try-Apr zone. By analyzing the dependence of peak height of Try-Apr on separation time, the dissociation rate kdH was obtained as 2.73 × 10-4 s-1 (298 K) at pH 2.46. The dependence of kdH on the proton concentration (pH = 2.09-3.12) revealed a first-order dependence of kdH on [H+]; kdH = kd + k1[H+], where kd is the spontaneous dissociation rate and was 5.65 × 10-5 s-1, and k1 is the second-order rate constant and was 5.07 × 10-2 M-1 s-1. From the kd value, the half-life of the Try-Apr complex at physiological pH was determined as 3.4 h. The presence of the proton-assisted dissociation can be explained by the protonation of -COO- of the Asp residue in Try, which breaks the salt bridge with the -NH3+ group of Lys in Apr.
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Affiliation(s)
- Yumiko Sasaki
- Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aramaki-Aoba, Aoba, Sendai, 980-8579, Japan
| | - Yosuke Sato
- Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aramaki-Aoba, Aoba, Sendai, 980-8579, Japan
| | - Toru Takahashi
- Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan
| | - Mitsuo Umetsu
- Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba, Sendai, 980-8579, Japan
| | - Nobuhiko Iki
- Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aramaki-Aoba, Aoba, Sendai, 980-8579, Japan.
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22
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2017–mid 2019). Electrophoresis 2019; 41:10-35. [DOI: 10.1002/elps.201900269] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/08/2019] [Accepted: 10/19/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and BiochemistryCzech Academy of Sciences Prague 6 Czechia
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23
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Bi J, Li T, Ren H, Ling R, Wu Z, Qin W. Capillary electrophoretic determination of heavy-metal ions using 11-mercaptoundecanoic acid and 6-mercapto-1-hexanol co-functionalized gold nanoparticle as colorimetric probe. J Chromatogr A 2019; 1594:208-215. [DOI: 10.1016/j.chroma.2019.02.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/17/2019] [Accepted: 02/04/2019] [Indexed: 11/25/2022]
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24
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Pangavhane S, Makrlík E, Ruzza P, Kašička V. Affinity capillary electrophoresis employed for determination of stability constants of antamanide complexes with univalent and divalent cations in methanol. Electrophoresis 2019; 40:2321-2328. [DOI: 10.1002/elps.201900043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 04/18/2019] [Accepted: 04/29/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Sachin Pangavhane
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences Prague Czechia
- University of Chemistry and Technology Prague Czechia
| | - Emanuel Makrlík
- Faculty of Environmental SciencesCzech University of Life Sciences Prague Czechia
| | - Paolo Ruzza
- Institute of Biomolecular Chemistry of CNR, Padua Unit Padua Italy
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences Prague Czechia
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25
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Sursyakova VV, Levdansky VA, Rubaylo AI. Thermodynamic parameters for the complexation of water‐insoluble betulin derivatives with (2‐hydroxypropyl)‐γ‐cyclodextrin determined by phase‐solubility technique combined with capillary zone electrophoresis. Electrophoresis 2019; 40:1656-1661. [DOI: 10.1002/elps.201800516] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/18/2019] [Accepted: 04/04/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Viktoria V. Sursyakova
- Institute of Chemistry and Chemical Technology SB RASFederal Research Center “Krasnoyarsk Science Center SB RAS Krasnoyarsk Russia
| | - Vladimir A. Levdansky
- Institute of Chemistry and Chemical Technology SB RASFederal Research Center “Krasnoyarsk Science Center SB RAS Krasnoyarsk Russia
| | - Anatoly I. Rubaylo
- Institute of Chemistry and Chemical Technology SB RASFederal Research Center “Krasnoyarsk Science Center SB RAS Krasnoyarsk Russia
- Siberian Federal University Krasnoyarsk Russia
- Federal Research Center “Krasnoyarsk Science Center SB RAS Krasnoyarsk Russia
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26
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Šolínová V, Žáková L, Jiráček J, Kašička V. Pressure assisted partial filling affinity capillary electrophoresis employed for determination of binding constants of human insulin hexamer complexes with serotonin, dopamine, arginine, and phenol. Anal Chim Acta 2019; 1052:170-178. [DOI: 10.1016/j.aca.2018.11.026] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 11/10/2018] [Accepted: 11/12/2018] [Indexed: 11/30/2022]
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27
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Willberger C, Leichtfuß D, Amayri S, Reich T. Determination of the Stability Constants of the Acetate Complexes of the Actinides Am(III), Th(IV), Np(V), and U(VI) Using Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry. Inorg Chem 2019; 58:4851-4858. [DOI: 10.1021/acs.inorgchem.8b03407] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Christian Willberger
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - Daniel Leichtfuß
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - Samer Amayri
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - Tobias Reich
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
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28
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Fu H, Qian C, Tong W, Li H, Chen DD. Mass spectrometry and affinity capillary electrophoresis for characterization of host-guest interactions. J Chromatogr A 2019; 1589:182-190. [DOI: 10.1016/j.chroma.2019.01.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 01/02/2019] [Accepted: 01/08/2019] [Indexed: 12/14/2022]
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29
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Stein M, Haselberg R, Mozafari‐Torshizi M, Wätzig H. Experimental design and measurement uncertainty in ligand binding studies by affinity capillary electrophoresis. Electrophoresis 2019; 40:1041-1054. [DOI: 10.1002/elps.201800450] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 12/12/2018] [Accepted: 12/29/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Matthias Stein
- Technische Universität BraunschweigInstitute of Medicinal and Pharmaceutical Chemistry Braunschweig Germany
| | - Rob Haselberg
- Division of Bioanalytical ChemistryAmsterdam Institute of MoleculesMedicines and SystemsVrije Universiteit Amsterdam Amsterdam The Netherlands
| | - Mona Mozafari‐Torshizi
- Technische Universität BraunschweigInstitute of Medicinal and Pharmaceutical Chemistry Braunschweig Germany
| | - Hermann Wätzig
- Technische Universität BraunschweigInstitute of Medicinal and Pharmaceutical Chemistry Braunschweig Germany
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30
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Wang J, Zhu Z, Jia W, Qiu L, Chang Y, Li J, Ma L, You Y, Wang J, Liu L, Xia J, Liu X, Li Y, Jiang P. Resolving quantum dots and peptide assembly and disassembly using bending capillary electrophoresis. Electrophoresis 2018; 40:1019-1026. [DOI: 10.1002/elps.201800466] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/06/2018] [Accepted: 12/10/2018] [Indexed: 01/22/2023]
Affiliation(s)
- Jianhao Wang
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Zhilan Zhu
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Wenjing Jia
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Lin Qiu
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Yufeng Chang
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Jie Li
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Luping Ma
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Ying You
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Jianpeng Wang
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Li Liu
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Jiang Xia
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
- Department of ChemistryThe Chinese University of Hong Kong Shatin P. R. China
| | - Xiaoqian Liu
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
| | - Yong‐Qiang Li
- State Key Laboratory of Radiation Medicine and ProtectionSchool of Radiation Medicine and ProtectionCollaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education InstitutionsSoochow University Suzhou P. R. China
| | - Pengju Jiang
- School of Pharmaceutical Engineering and Life ScienceChangzhou University Changzhou P. R. China
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31
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Štěpánová S, Kašička V. Recent developments and applications of capillary and microchip electrophoresis in proteomics and peptidomics (2015-mid 2018). J Sep Sci 2018; 42:398-414. [DOI: 10.1002/jssc.201801090] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/15/2018] [Accepted: 11/16/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Sille Štěpánová
- Institute of Organic Chemistry and Biochemistry; The Czech Academy of Sciences; Prague 6 Czechia
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry; The Czech Academy of Sciences; Prague 6 Czechia
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32
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Wang J, Qiu L, You Y, Ma L, Zhu Z, Yang L, Wang J, Wang X, Liu L, Liu X, Chang Y, Li J, Gao L, Li YQ. A novel in-capillary assay for dynamically monitoring fast binding between antibody and peptides using CE. J Sep Sci 2018; 41:4544-4550. [DOI: 10.1002/jssc.201800946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/16/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Jianhao Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Lin Qiu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Ying You
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Luping Ma
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Zhilan Zhu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Li Yang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Jianpeng Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Xiang Wang
- Radiology Department; The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University; Changzhou Jiangsu P. R. China
| | - Li Liu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Xiaoqian Liu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Yufeng Chang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Jie Li
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P. R. China
| | - Liqian Gao
- School of Pharmaceutical Science (Shenzhen); Sun Yat-Sen University (SYSU); Guangzhou Guangdong P. R. China
| | - Yong-Qiang Li
- State Key Laboratory of Radiation Medicine and Protection; School of Radiation Medicine and Protection; Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions; Soochow University; Suzhou P. R.China
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33
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Fast high-throughput screening of glutathione S-transferase polymorphism by voltage programming-based multi-channel microchip electrophoresis. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1097-1098:10-17. [DOI: 10.1016/j.jchromb.2018.08.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/31/2018] [Accepted: 08/28/2018] [Indexed: 01/05/2023]
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34
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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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35
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Konášová R, Koval D, Dytrtová JJ, Kašička V. Comparison of two low flow interfaces for measurement of mobilities and stability constants by affinity capillary electrophoresis–mass spectrometry. J Chromatogr A 2018; 1568:197-204. [DOI: 10.1016/j.chroma.2018.07.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 06/28/2018] [Accepted: 07/04/2018] [Indexed: 12/19/2022]
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36
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Frontal analysis capillary electrophoresis: recent advances and future perspectives. Bioanalysis 2018; 10:1143-1159. [DOI: 10.4155/bio-2018-0051] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The developments on frontal analysis capillary electrophoresis (FACE) from 2012 to 2017 to study interactions of simple and complex systems are reviewed. Most research papers focused on therapeutic drug-related studies; however, other studies include chemical sensing, drug delivery, inhibitor screening and capillary coating. New ligand–substrate systems such as template-molecularly imprinted polymer systems were reported. Comparison of FACE with other analytical techniques used to investigate binding interaction, and the determination of binding parameters using different isotherm models are also covered. In 2017, eight research papers were reported including new detection by ESI–MS. Future research direction of FACE may include high sensitivity detection and throughput screening of drugs, natural products and biomarkers for clinical diagnosis.
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Olabi M, Stein M, Wätzig H. Affinity capillary electrophoresis for studying interactions in life sciences. Methods 2018; 146:76-92. [PMID: 29753786 DOI: 10.1016/j.ymeth.2018.05.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/04/2018] [Accepted: 05/07/2018] [Indexed: 12/14/2022] Open
Abstract
Affinity capillary electrophoresis (ACE) analyzes noncovalent interactions between ligands and analytes based on changes in their electrophoretic mobility. This technique has been widely used to investigate various biomolecules, mainly proteins, polysaccharides and hormones. ACE is becoming a technique of choice to validate high throughput screening results, since it is very predictively working in realistic and relevant media, e.g. in body fluids. It is highly recommended to incorporate ACE as a powerful analytical tool to properly prepare animal testing and preclinical studies. The interacting molecules can be found free in solution or can be immobilized to a solid support. Thus, ACE is classified in two modes, free solution ACE and immobilized ACE. Every ACE mode has advantages and disadvantages. Each can be used for a variety of applications. This review covers literature of scopus and SciFinder data base in the period from 2016 until beginning 2018, including the keywords "affinity capillary electrophoresis", "immunoaffinity capillary electrophoresis", "immunoassay capillary electrophoresis" and "immunosorbent capillary electrophoresis". More than 200 articles have been found and 112 have been selected and thoroughly discussed. During this period, the data processing and the underlying calculations in mobility shift ACE (ms ACE), frontal analysis ACE (FA ACE) and plug-plug kinetic capillary electrophoresis (ppKCE) as mostly applied free solution techniques have substantially improved. The range of applications in diverse free solution and immobilized ACE techniques has been considerably broadened.
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Affiliation(s)
- Mais Olabi
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstr. 55, 38106 Braunschweig, Germany.
| | - Matthias Stein
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstr. 55, 38106 Braunschweig, Germany.
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig, Beethovenstr. 55, 38106 Braunschweig, Germany.
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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: 8] [Impact Index Per Article: 1.3] [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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Ansorge M, Dubský P, Ušelová K. Into the theory of the partial-filling affinity capillary electrophoresis and the determination of apparent stability constants of analyte-ligand complexes. Electrophoresis 2018; 39:742-751. [DOI: 10.1002/elps.201700385] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/21/2017] [Accepted: 11/21/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Martin Ansorge
- Charles University in Prague, Faculty of Science; Department of Physical and Macromolecular Chemistry; Prague Czech Republic
| | - Pavel Dubský
- Charles University in Prague, Faculty of Science; Department of Physical and Macromolecular Chemistry; Prague Czech Republic
| | - Kateřina Ušelová
- Charles University in Prague, Faculty of Science; Department of Physical and Macromolecular Chemistry; Prague Czech Republic
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40
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Nevídalová H, Michalcová L, Glatz Z. In-depth insight into the methods of plasma protein-drug interaction studies: Comparison of capillary electrophoresis-frontal analysis, isothermal titration calorimetry, circular dichroism and equilibrium dialysis. Electrophoresis 2017; 39:581-589. [DOI: 10.1002/elps.201700325] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/20/2017] [Accepted: 10/28/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Hana Nevídalová
- Department of Biochemistry; Faculty of Science; Masaryk University; Brno Czech Republic
| | - Lenka Michalcová
- Department of Biochemistry; Faculty of Science; Masaryk University; Brno Czech Republic
| | - Zdeněk Glatz
- Department of Biochemistry; Faculty of Science; Masaryk University; Brno Czech Republic
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41
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2015-mid 2017). Electrophoresis 2017; 39:209-234. [PMID: 28836681 DOI: 10.1002/elps.201700295] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/15/2017] [Accepted: 08/16/2017] [Indexed: 12/17/2022]
Abstract
The review brings a comprehensive overview of recent developments and applications of high performance capillary and microchip electroseparation methods (zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) to analysis, microscale isolation, purification, and physicochemical and biochemical characterization of peptides in the years 2015, 2016, and ca. up to the middle of 2017. Advances in the investigation of electromigration properties of peptides and in the methodology of their analysis (sample preseparation, preconcentration and derivatization, adsorption suppression and EOF control, and detection) are described. New developments in particular CE and CEC methods are presented and several types of their applications to peptide analysis are reported: qualitative and quantitative analysis, determination in complex (bio)matrices, monitoring of chemical and enzymatical reactions and physical changes, amino acid, sequence and chiral analysis, and peptide mapping of proteins. Some micropreparative peptide separations are shown and capabilities of CE and CEC methods to provide important physicochemical characteristics of peptides are demonstrated.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
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42
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Pangavhane S, Böhm S, Makrlík E, Ruzza P, Kašička V. Affinity capillary electrophoresis and density functional theory study of noncovalent interactions of cyclic peptide [Gly6
]-antamanide with small cations. Electrophoresis 2017; 38:2025-2033. [DOI: 10.1002/elps.201700141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 04/26/2017] [Accepted: 05/02/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Sachin Pangavhane
- The Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences; Prague Czech Republic
- Faculty of Food and Biochemical Technology; University of Chemistry and Technology; Prague Czech Republic
| | - Stanislav Böhm
- Faculty of Food and Biochemical Technology; University of Chemistry and Technology; Prague Czech Republic
| | - Emanuel Makrlík
- Faculty of Environmental Sciences; Czech University of Life Sciences; Prague Czech Republic
| | - Paolo Ruzza
- Institute of Biomolecular Chemistry of CNR; Padua Unit; Padua Italy
| | - Václav Kašička
- The Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences; Prague Czech Republic
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43
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Mozafari M, Balasupramaniam S, Preu L, El Deeb S, Reiter CG, Wätzig H. Using affinity capillary electrophoresis and computational models for binding studies of heparinoids with p-selectin and other proteins. Electrophoresis 2017; 38:1560-1571. [DOI: 10.1002/elps.201600480] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 02/28/2017] [Accepted: 03/01/2017] [Indexed: 02/01/2023]
Affiliation(s)
- Mona Mozafari
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | | | - Lutz Preu
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | | | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
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44
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Pangavhane S, Böhm S, Makrlík E, Ruzza P, Kašička V. Affinity capillary electrophoresis and quantum mechanical calculations applied to investigation of [Gly 6 ]-antamanide binding with sodium and potassium ions. Electrophoresis 2017; 38:1551-1559. [PMID: 28106251 DOI: 10.1002/elps.201600474] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 12/28/2016] [Accepted: 01/13/2017] [Indexed: 01/14/2023]
Abstract
ACE in a free solution and quantum mechanical density functional theory have been applied to the investigation of interactions of glycine-6-antamanide ([Gly6 ]AA), a synthetic derivative of cyclic decapeptide antamanide isolated from the highly poisonous mushroom Amanita phalloides, with sodium or potassium ions in methanol. First, from the dependence of effective electrophoretic mobility of [Gly6 ]AA on Na+ or K+ ions concentration in the BGE (methanolic solution of 20 mM chloroacetic acid, 10 mM Tris, pHMeOH 7.8, containing 0-50 mM NaCl or 0-40 mM KCl), the apparent binding (stability) constants of [Gly6 ]AA-Na+ and [Gly6 ]AA-K+ complexes were evaluated as 26 ± 1 and 14 ± 1 L/mol, respectively. The employed ACE method included correction of the effective mobilities measured at ambient temperature and at variable ionic strength of the BGEs to the mobilities related to the reference temperature 25°C and to the constant ionic strength 10 mM. Second, the interaction energies of the [Gly6 ]AA-Na+ and [Gly6 ]AA-K+ complexes (-466.3 and -345.2 kJ/mol, respectively) and the structural details of these complexes, such as position of the Na+ and K+ ions in the cavity of the [Gly6 ]AA molecule and the interatomic distances within these complexes, were determined by the density functional theory calculations.
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Affiliation(s)
- Sachin Pangavhane
- Electromigration Methods, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic.,Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, Czech Republic
| | - Stanislav Böhm
- Faculty of Food and Biochemical Technology, University of Chemistry and Technology, Prague, Czech Republic
| | - Emanuel Makrlík
- Faculty of Environmental Science, Czech University of Life Sciences, Prague, Czech Republic
| | - Paolo Ruzza
- Chemical Sciences, Institute of Biomolecular Chemistry of CNR, Padua Unit, Padua, Italy
| | - Václav Kašička
- Electromigration Methods, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
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45
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Wang J, Fan J, Li J, Liu L, Wang J, Jiang P, Liu X, Qiu L. In-capillary probing of quantum dots and fluorescent protein self-assembly and displacement using Förster resonance energy transfer. J Sep Sci 2017; 40:933-939. [PMID: 27935249 DOI: 10.1002/jssc.201600937] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 11/09/2016] [Accepted: 11/28/2016] [Indexed: 12/31/2022]
Abstract
Herein, a Förster resonance energy transfer system was designed, which consisted of CdSe/ZnS quantum dots donor and mCherry fluorescent protein acceptor. The quantum dots and the mCherry proteins were conjugated to permit Förster resonance energy transfer. Capillary electrophoresis with fluorescence detection was used for the analyses for the described system. The quantum dots and mCherry were sequentially injected into the capillary, while the real-time fluorescence signal of donor and acceptor was simultaneously monitored by two channels with fixed wavelength detectors. An effective separation of complexes from free donor and acceptor was achieved. Results showed quantum dots and hexahistidine tagged mCherry had high affinity and the assembly was affected by His6 -mCherry/quantum dot molar ratio. The kinetics of the self-assembly was calculated using the Hill equation. The microscopic dissociation constant values for out of- and in-capillary assays were 10.49 and 23.39 μM, respectively. The capillary electrophoresis with fluorescence detection that monitored ligands competition assay further delineated the different binding capacities of histidine containing peptide ligands for binding sites on quantum dots. This work demonstrated a novel approach for the improvement of Förster resonance energy transfer for higher efficiency, increased sensitivity, intuitionistic observation, and low sample requirements of the in-capillary probing system.
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Affiliation(s)
- Jianhao Wang
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
| | - Jie Fan
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
| | - Jinchen Li
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
| | - Li Liu
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
| | - Jianpeng Wang
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
| | - Pengju Jiang
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
- Key Laboratory of Synthetic Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, People's Republic of China
| | - Xiaoqian Liu
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
| | - Lin Qiu
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou, Jiangsu, People's Republic of China
- State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, Jiangsu, People's Republic of China
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46
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Qin H, Jiang X, Fan J, Wang J, Liu L, Qiu L, Wang J, Jiang P. Investigation of the weak binding of a tetrahistidine-tagged peptide to quantum dots by using capillary electrophoresis with fluorescence detection. J Sep Sci 2016; 40:567-573. [DOI: 10.1002/jssc.201601183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 11/04/2016] [Accepted: 11/07/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Haifang Qin
- Institute of Pharmaceutical and Environmental Engineering; Changzhou Vocational Institute of Engineering; Changzhou Jiangsu P.R. China
| | - Xiyuan Jiang
- Kunshan affiliated Hospital of Nanjing University of Chinese Medicine; Kunshan Jiangsu P.R. China
| | - Jie Fan
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P.R. China
| | - Jianpeng Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P.R. China
| | - Li Liu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P.R. China
| | - Lin Qiu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P.R. China
| | - Jianhao Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P.R. China
| | - Pengju Jiang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu P.R. China
- Key Laboratory of Synthetic Biology, Shanghai Institutes for Biological Sciences; Chinese Academy of Sciences; Shanghai P.R. China
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47
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Štěpánová S, Kašička V. Analysis of proteins and peptides by electromigration methods in microchips. J Sep Sci 2016; 40:228-250. [PMID: 27704694 DOI: 10.1002/jssc.201600962] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 09/14/2016] [Accepted: 09/14/2016] [Indexed: 11/07/2022]
Abstract
This review presents the developments and applications of microchip electromigration methods in the separation and analysis of peptides and proteins in the period 2011-mid-2016. The developments in sample preparation and preconcentration, microchannel material, and surface treatment are described. Separations by various microchip electromigration methods (zone electrophoresis in free and sieving media, affinity electrophoresis, isotachophoresis, isoelectric focusing, electrokinetic chromatography, and electrochromatography) are demonstrated. Advances in detection methods are reported and novel applications in the areas of proteomics and peptidomics, quality control of peptide and protein pharmaceuticals, analysis of proteins and peptides in biomatrices, and determination of physicochemical parameters are shown.
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Affiliation(s)
- Sille Štěpánová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
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48
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Wang J, Yang L, Liu L, Wu H, Wang J, Jiang P, Jiang X, Qiu L. Investigation of multivalent interactions between conjugate of quantum dots with c-Myc peptide tag and the anti-c-Myc antibody by capillary electrophoresis with fluorescence detection. J Sep Sci 2016; 39:4653-4659. [DOI: 10.1002/jssc.201600931] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 09/18/2016] [Accepted: 09/24/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Jianhao Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Li Yang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Li Liu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Hao Wu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Jianpeng Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Pengju Jiang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
- Key Laboratory of Synthetic Biology, Shanghai Institutes for Biological Sciences; Chinese Academy of Sciences; Shanghai People's Republic of China
| | - Xiyuan Jiang
- Kunshan affiliated Hospital of Nanjing University of Chinese Medicine; Kunshan Jiangsu People's Republic of China
| | - Lin Qiu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
- State Key Laboratory of Coordination Chemistry; Nanjing University; Nanjing Jiangsu People's Republic of China
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49
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Konášová R, Dytrtová JJ, Kašička V. Study of solvent effects on the stability constant and ionic mobility of the dibenzo-18-crown-6 complex with potassium ion by affinity capillary electrophoresis. J Sep Sci 2016; 39:4429-4438. [DOI: 10.1002/jssc.201600830] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 09/03/2016] [Accepted: 09/05/2016] [Indexed: 01/10/2023]
Affiliation(s)
- Renáta Konášová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences; Prague 6 Czech Republic
- Department of Analytical chemistry, Faculty of Science; Charles University in Prague; Prague 2 Czech Republic
| | - Jana Jaklová Dytrtová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences; Prague 6 Czech Republic
- Charles University in Prague; Faculty of Physical Education and Sport; Prague 6 Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences; Prague 6 Czech Republic
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50
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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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