1
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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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Deng L, Fu Q, Zhang Y, Shui F, Tang J, Wu J, Zeng J. Study of molecular interactions by nonequilibrium capillary electrophoresis of equilibrium mixtures: Originations, developments, and applications. Electrophoresis 2023; 44:1664-1673. [PMID: 37621032 DOI: 10.1002/elps.202300166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/16/2023] [Accepted: 08/18/2023] [Indexed: 08/26/2023]
Abstract
Molecular interactions play a vital role in regulating various physiological and biochemical processes in vivo. Kinetic capillary electrophoresis (KCE) is an analytical platform that offers significant advantages in studying the thermodynamic and kinetic parameters of molecular interactions. It enables the simultaneous analysis of these parameters within an interaction pattern and facilitates the screening of binding ligands with predetermined kinetic parameters. Nonequilibrium capillary electrophoresis of equilibrium mixtures (NECEEM) was the first proposed KCE method, and it has found widespread use in studying molecular interactions involving proteins/aptamers, proteins/small molecules, and peptides/small molecules. The successful applications of NECEEM have demonstrated its promising potential for further development and broader application. However, there has been a dearth of recent reviews on NECEEM. To address this gap, our study provides a comprehensive description of NECEEM, encompassing its origins, development, and applications from 2015 to 2022. The primary focus of the applications section is on aptamer selection and screening of small-molecule ligands. Furthermore, we discuss important considerations in NECEEM experimental design, such as buffer suitability, detector selection, and protein adsorption. By offering this thorough review, we aim to contribute to the understanding, advancement, and wider utilization of NECEEM as a valuable tool for studying molecular interactions and facilitating the identification of potential ligands and targets.
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Affiliation(s)
- Li Deng
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Qifeng Fu
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Yujie Zhang
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Fan Shui
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Jia Tang
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Jianming Wu
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
- School of Basic Medical Science, Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Jing Zeng
- School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, P. R. China
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3
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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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4
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Bržezická T, Glatz Z, Kohútová L. Sensitivity enhancement of capillary electrophoresis-frontal analysis-based method for characterization of drug-protein interactions using on-line sample preconcentration. J Sep Sci 2023; 46:e2300152. [PMID: 37386816 DOI: 10.1002/jssc.202300152] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/31/2023] [Accepted: 06/10/2023] [Indexed: 07/01/2023]
Abstract
Capillary electrophoresis-frontal analysis is one of the most frequently used approaches for the study of plasma protein-drug interactions as a substantial part of new drug development. However, the capillary electrophoresis-frontal analysis typically combined with ultraviolet-visible detection suffers from insufficient concentration sensitivity, particularly for substances with limited solubility and low molar absorption coefficient. The sensitivity problem has been solved in this work by its combination with an on-line sample preconcentration. According to the knowledge of the authors this combination has never been used to characterize plasma protein-drug binding. It resulted in a fully automated and versatile methodology for the characterization of binding interactions. Further, the validated method minimalizes the experimental errors due to a reduction in the manipulation of samples. Moreover, employing an on-line preconcentration strategy with capillary electrophoresis-frontal analysis using human serum albumin-salicylic acid as a model system improves the drug concentration sensitivity 17-fold compared to the conventional method. The value of binding constant (1.51 ± 0.63) · 104 L/mol obtained by this new capillary electrophoresis-frontal analysis modification is in agreement with the value (1.13 ± 0.28) ·104 L/mol estimated by a conventional variant of capillary electrophoresis-frontal analysis without the preconcentration step, as well as with literature data obtained using different techniques.
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Affiliation(s)
- Taťána Bržezická
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Zdeněk Glatz
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lenka Kohútová
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
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5
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De Silva M, Dunn RC. Sample plug induced peak splitting in capillary electrophoresis studied using dual backscattered interferometry and fluorescence detection. Electrophoresis 2023; 44:549-557. [PMID: 36641782 DOI: 10.1002/elps.202200244] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/07/2022] [Accepted: 01/03/2023] [Indexed: 01/16/2023]
Abstract
The appearance of unexpected peaks in capillary electrophoresis (CE) is common and can lengthen the time of method development as assay conditions and experimental parameters are varied to understand and mitigate the effects of the additional peaks. Additional peaks can arise when a single-analyte zone is split into multiple zones. Understanding the underlying mechanism of these phenomena, recognizing conditions that favor its presence, and knowing how to confirm and eliminate the effect are important for efficient method optimization. In this study, we examine how the overlap of analyte zones with the sample plug can lead to peak splitting. This is explored experimentally using dual detection CE, which enables both the sample plug and analyte zones to be independently and simultaneously measured from the same detection volume. Simulations performed via COMSOL Multiphysics confirm the origin of the splitting and help guide experiments to reduce and eliminate the effect. Our findings show that this peak splitting mechanism can arise in separations of both small and large molecules but is, especially, prevalent in separations of slowly migrating macromolecules. This effect is also more prevalent when using a short length-to-detector, as is commonly found in microfluidic applications. A simple diffusion-less model is introduced to develop strategies for reducing peak splitting that avoids modifying the apparatus, such as by lengthening the separation length, which can be difficult. Decreasing the sample plug length and slowing the electroosmotic flow can both reduce this effect, which is confirmed experimentally.
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Affiliation(s)
- Miyuru De Silva
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, Kansas, USA
| | - Robert C Dunn
- Ralph N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, Kansas, USA
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6
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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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7
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Identifying potential ligands specifically binding to beta1-adrenoceptor from Radix Aconiti Lateralis Praeparata extract by affinity chromatographic method. J Pharm Biomed Anal 2022; 220:115022. [DOI: 10.1016/j.jpba.2022.115022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 08/06/2022] [Accepted: 08/26/2022] [Indexed: 11/20/2022]
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8
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Mlčochová H, Michalcová L, Glatz Z. Extending the application potential of capillary electrophoresis/frontal analysis for drug‐plasma protein studies by combining it with mass spectrometry detection. Electrophoresis 2022; 43:955-963. [DOI: 10.1002/elps.202100301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/30/2021] [Accepted: 01/03/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Hana Mlčochová
- 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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9
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Wang S, Yang Y, Yang Y, Li H, Chen DDY. Quantitative characterization of human oncogene promoter G-quadruplex DNA-ligand interactions using a combination of mass spectrometry and capillary electrophoresis. Electrophoresis 2021; 42:1450-1460. [PMID: 33990994 DOI: 10.1002/elps.202100077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/29/2021] [Accepted: 05/04/2021] [Indexed: 11/08/2022]
Abstract
Human c-KIT oncogene is known to regulate cell growth and proliferation, and thus, acts as a probable target in the treatment of gastrointestinal tumors (GIST). To identify small molecule ligands which can specifically bind with the G-quadruplex (G4) in the c-KIT promoter region as potential antitumor agents, we propose the combination of electrospray ionization-mass spectrometry (ESI-MS), capillary electrophoresis frontal analysis (CE-FA), and Taylor dispersion analysis (TDA) to accurately investigate the G4/ligands binding properties. First, ESI-MS was used for initial screening of natural products (NPs). CE-FA was then used to calculate specific binding constants and the stoichiometry of the native state binding pair in solution. Next, TDA, a micro-capillary flow technique was used to examine the effect of the ligand binding on the diffusivity and particle size of the c-KIT G4. Two of the screened NPs, scopolamine butylbromide (L1) and isorhamnetin-3-O-neohesperidoside (L3), were found to specifically bind to the c-KIT G4 with binding constants of around 104 M-1 and 1:1 stoichiometry in a free solution. TDA data showed that ligand binding (both L1 and L3) induced the c-KIT strands to fold into a tightly structured G4 with a decreased hydrodynamic radius. These ligands have the potential to be drug candidates for the regulation of c-KIT gene transcription by stabilizing the G4 structure. This methodology not only increased the speed of analysis but also improved its accuracy and specificity compared with the conventional binding approaches.
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Affiliation(s)
- Shuangshuang Wang
- National and local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Changzhou Institute of Innovation and Development, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, P. R. China
| | - Yang Yang
- National and local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Changzhou Institute of Innovation and Development, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, P. R. China
| | - Yunhe Yang
- National and local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Changzhou Institute of Innovation and Development, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, P. R. China
| | - Huihui Li
- National and local Joint Engineering Research Center of Biomedical Functional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Changzhou Institute of Innovation and Development, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, P. R. China
| | - David D Y Chen
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
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10
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Recent advances in the determination of unbound concentration and plasma protein binding of drugs: Analytical methods. Talanta 2021; 225:122052. [DOI: 10.1016/j.talanta.2020.122052] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 12/17/2020] [Accepted: 12/23/2020] [Indexed: 02/08/2023]
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11
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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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12
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Wang Y, Adeoye DI, Ogunkunle EO, Wei IA, Filla RT, Roper MG. Affinity Capillary Electrophoresis: A Critical Review of the Literature from 2018 to 2020. Anal Chem 2020; 93:295-310. [DOI: 10.1021/acs.analchem.0c04526] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yao Wang
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Damilola I. Adeoye
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Emmanuel O. Ogunkunle
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - I-An Wei
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Robert T. Filla
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Michael G. Roper
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
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13
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Ragab MAA, El-Kimary EI. Recent Advances and Applications of Microfluidic Capillary Electrophoresis: A Comprehensive Review (2017-Mid 2019). Crit Rev Anal Chem 2020; 51:709-741. [PMID: 32447968 DOI: 10.1080/10408347.2020.1765729] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Microfluidic capillary electrophoresis (MCE) is the novel technique resulted from the CE mininaturization as planar separation and analysis device. This review presents and discusses various application fields of this advanced technology published in the period 2017 till mid-2019 in eight different sections including clinical, biological, single cell analysis, environmental, pharmaceuticals, food analysis, forensic and ion analysis. The need for miniaturization of CE and the consequence advantages achieved are also discussed including high-throughput, miniaturized detection, effective separation, portability and the need for micro- or even nano-volume of samples. Comprehensive tables for the MCE applications in the different studied fields are provided. Also, figure comparing the number of the published papers applying MCE in the eight discussed fields within the studied period is included. The future investigation should put into consideration the possibility of replacing conventional CE with the MCE after proper validation. Suitable validation parameters with their suitable accepted ranges should be tailored for analysis methods utilizing such unique technique (MCE).
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Affiliation(s)
- Marwa A A Ragab
- Faculty of Pharmacy, Department of Pharmaceutical Analytical Chemistry, Alexandria University, El-Messalah, Alexandria, Egypt
| | - Eman I El-Kimary
- Faculty of Pharmacy, Department of Pharmaceutical Analytical Chemistry, Alexandria University, El-Messalah, Alexandria, Egypt
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14
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Baroni A, Neaga I, Delbosc N, Wells M, Verdy L, Ansseau E, Vanden Eynde JJ, Belayew A, Bodoki E, Oprean R, Hambye S, Blankert B. Bioactive Aliphatic Polycarbonates Carrying Guanidinium Functions: An Innovative Approach for Myotonic Dystrophy Type 1 Therapy. ACS OMEGA 2019; 4:18126-18135. [PMID: 31720515 PMCID: PMC6843715 DOI: 10.1021/acsomega.9b02034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
Dystrophia myotonica type 1 (DM1) results from nuclear sequestration of splicing factors by a messenger RNA (mRNA) harboring a large (CUG) n repeat array transcribed from the causal (CTG) n DNA amplification. Several compounds were previously shown to bind the (CUG) n RNA and release the splicing factors. We now investigated for the first time the interaction of an aliphatic polycarbonate carrying guanidinium functions to DM1 DNA/RNA model probes by affinity capillary electrophoresis. The apparent association constants (K a) were in the range described for reference compounds such as pentamidine. Further macromolecular engineering could improve association specificity. The polymer presented no toxicity in cell culture at concentrations of 1.6-100.0 μg/mL as evaluated both by MTT and real-time monitoring xCELLigence method. These promising results may lay the foundation for a new branch of potential therapeutic agents for DM1.
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Affiliation(s)
- Alexandra Baroni
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
- Laboratory
of Polymeric and Composite Materials, Center of Innovation and Research
in Materials and Polymers (CIRMAP), University
of Mons. 20 Place du Parc, 7000 Mons, Belgium
| | - Ioan Neaga
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
- Analytical
Chemistry Department, “Iuliu Haţieganu”
University of Medicine and Pharmacy, 4, Louis Pasteur Street, 400349 Cluj-Napoca, Romania
| | - Nicolas Delbosc
- Laboratory
of Polymeric and Composite Materials, Center of Innovation and Research
in Materials and Polymers (CIRMAP), University
of Mons. 20 Place du Parc, 7000 Mons, Belgium
| | - Mathilde Wells
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Laetitia Verdy
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Eugénie Ansseau
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Jean Jacques Vanden Eynde
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Alexandra Belayew
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Ede Bodoki
- Analytical
Chemistry Department, “Iuliu Haţieganu”
University of Medicine and Pharmacy, 4, Louis Pasteur Street, 400349 Cluj-Napoca, Romania
| | - Radu Oprean
- Analytical
Chemistry Department, “Iuliu Haţieganu”
University of Medicine and Pharmacy, 4, Louis Pasteur Street, 400349 Cluj-Napoca, Romania
| | - Stéphanie Hambye
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Bertrand Blankert
- Laboratory
of Pharmaceutical Analysis, Faculty of Medicine and Pharmacy,
Research Institute for Health Sciences and Technology, Laboratory of Molecular
Biology, Faculty of Medicine and Pharmacy, Research Institute for
Health Sciences and Technology, and Laboratory of Organic Chemistry, Faculty of
Sciences, University of Mons, Place du Parc 20, 7000 Mons, Belgium
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15
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Zhang C, Woolfork AG, Suh K, Ovbude S, Bi C, Elzoeiry M, Hage DS. Clinical and pharmaceutical applications of affinity ligands in capillary electrophoresis: A review. J Pharm Biomed Anal 2019; 177:112882. [PMID: 31542417 DOI: 10.1016/j.jpba.2019.112882] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/07/2019] [Accepted: 09/10/2019] [Indexed: 01/14/2023]
Abstract
Affinity capillary electrophoresis (ACE) is a separation technique that combines a biologically-related binding agent with the separating power and efficiency of capillary electrophoresis. This review will examine several classes of binding agents that have been used in ACE and applications that have been described for the resulting methods in clinical or pharmaceutical analysis. Binding agents that will be considered are antibodies, aptamers, lectins, serum proteins, carbohydrates, and enzymes. This review will also describe the various formats in which each type of binding agent has been used in CE, including both homogeneous and heterogeneous methods. Specific areas of applications that will be considered are CE-based immunoassays, glycoprotein/glycan separations, chiral separations, and biointeraction studies. The general principles and formats of ACE for each of these applications will be examined, along with the potential advantages or limitations of these methods.
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Affiliation(s)
- Chenhua Zhang
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Ashley G Woolfork
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Kyungah Suh
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Susan Ovbude
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Cong Bi
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - Marawan Elzoeiry
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska, Lincoln, NE, 68588-0304, USA.
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16
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Sun H, Liu J, Li Y, Wang J, Zhang Y. Characterization of the heterogeneous adsorption of three drugs on immobilized bovine serum albumin by adsorption energy distribution. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1125:121727. [DOI: 10.1016/j.jchromb.2019.121727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 07/10/2019] [Accepted: 07/19/2019] [Indexed: 02/08/2023]
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17
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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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18
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Nevídalová H, Michalcová L, Glatz Z. Capillary electrophoresis-based approaches for the study of affinity interactions combined with various sensitive and nontraditional detection techniques. Electrophoresis 2019; 40:625-642. [PMID: 30600537 DOI: 10.1002/elps.201800367] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 12/20/2018] [Accepted: 12/20/2018] [Indexed: 12/17/2022]
Abstract
Nearly all processes in living organisms are controlled and regulated by the synergy of many biomolecule interactions involving proteins, peptides, nucleic acids, nucleotides, saccharides, and small molecular weight ligands. There is growing interest in understanding them, not only for the purposes of interactomics as an essential part of system biology, but also in their further elucidation in disease pathology, diagnostics, and treatment. The necessity of detailed investigation of these interactions leads to the requirement of laboratory methods characterized by high efficiency and sensitivity. As a result, many instrumental approaches differing in their fundamental principles have been developed, including those based on capillary electrophoresis. Although capillary electrophoresis offers numerous advantages for such studies, it still has one serious limitation, its poor concentration sensitivity with the most commonly used detection method-ultraviolet-visible spectrometry. However, coupling capillary electrophoresis with a more sensitive detector fulfils the above-mentioned requirement. In this review, capillary electrophoresis combined with fluorescence, mass spectrometry, and several nontraditional detection techniques in affinity interaction studies are summarized and discussed, together with the possibility of conducting these measurements in microchip format.
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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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19
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Henneberger L, Mühlenbrink M, Fischer FC, Escher BI. C18-Coated Solid-Phase Microextraction Fibers for the Quantification of Partitioning of Organic Acids to Proteins, Lipids, and Cells. Chem Res Toxicol 2018; 32:168-178. [DOI: 10.1021/acs.chemrestox.8b00249] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Luise Henneberger
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research − UFZ, Permoserstr. 15, 04318 Leipzig, Germany
| | - Marie Mühlenbrink
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research − UFZ, Permoserstr. 15, 04318 Leipzig, Germany
| | - Fabian C. Fischer
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research − UFZ, Permoserstr. 15, 04318 Leipzig, Germany
| | - Beate I. Escher
- Department of Cell Toxicology, Helmholtz Centre for Environmental Research − UFZ, Permoserstr. 15, 04318 Leipzig, Germany
- Environmental Toxicology, Center for Applied Geoscience, Eberhard Karls University Tübingen, 72074 Tübingen, Germany
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20
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Miyabe K. Moment analysis for reaction kinetics of intermolecular interactions. Electrophoresis 2018; 39:3032-3039. [PMID: 30156042 DOI: 10.1002/elps.201800218] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/23/2018] [Accepted: 08/19/2018] [Indexed: 01/05/2023]
Abstract
Moment equations were developed on the basis of the principle of relativity for analyzing elution peak profiles measured by ACE to analytically determine the association (ka ) and dissociation (kd ) rate constants of intermolecular interactions. Basic equations representing the mass balance, mass transfer rate, and reaction kinetics in ACE system in a Galilean coordinate system S were transformed to those in another coordinate system S', which imaginarily moved with respect to S. Moment equations for ACE peaks in S' in the time domain were derived from the analytical solution of the modified basic equations in the Laplace domain. Moment equations for ACE peaks in S were derived from those in S' by the inverse Galilean transformation. The moment equations were used for analyzing some ACE data previously published to determine ka and kd values. It was demonstrated that the moment equations were effective for extracting the information about affinity kinetics of intermolecular interactions from the elution peak profiles measured by ACE. The moment equations were also used to discuss the influence of mass transfer and reaction kinetics on ACE peak profiles. Some results of the numerical calculations are also indicated in Supporting Information.
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Affiliation(s)
- Kanji Miyabe
- Department of Chemistry, Faculty of Science, Rikkyo University, Toshima-ku, Tokyo, Japan
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21
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Nachbar M, Maul J, Stein M, Wätzig H. Analysis of AtHIRD11 Intrinsic Disorder and Binding Towards Metal Ions by Capillary Gel Electrophoresis and Affinity Capillary Electrophoresis. J Vis Exp 2018. [PMID: 30199021 DOI: 10.3791/57749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Plants are strongly dependent on their environment. In order to adjust to stressful changes (e.g., drought and high salinity), higher plants evolve classes of intrinsically disordered proteins (IDPs) to reduce oxidative and osmotic stress. This article uses a combination of capillary gel electrophoresis (CGE) and mobility shift affinity electrophoresis (ACE) in order to describe the binding behavior of different conformers of the IDP AtHIRD11 from Arabidopsis thaliana. CGE is used to confirm the purity of AtHIRD11 and to exclude fragments, posttranslational modifications, and other impurities as reasons for complex peak patterns. In this part of the experiment, the different sample components are separated by a viscous gel inside a capillary by their different masses and detected with a diode array detector. Afterward, the binding behavior of the sample towards various metal ions is investigated by ACE. In this case, the ligand is added to the buffer solution and the shift in migration time is measured in order to determine whether a binding event has occurred or not. One of the advantages of using the combination of CGE and ACE to determine the binding behavior of an IDP is the possibility to automate the gel electrophoresis and the binding assay. Furthermore, CGE shows a lower limit of detection than the classical gel electrophoresis and ACE is able to determine the manner of binding a ligand in a fast manner. In addition, ACE can also be applied to other charged species than metal ions. However, the use of this method for binding experiments is limited in its ability to determine the number of binding sites. Nevertheless, the combination of CGE and ACE can be adapted for characterizing the binding behavior of any protein sample towards numerous charged ligands.
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Affiliation(s)
- Markus Nachbar
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig;
| | - Jorrit Maul
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig
| | - Matthias Stein
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry, TU Braunschweig
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22
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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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23
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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: 47] [Impact Index Per Article: 7.8] [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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24
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Affinity capillary electrophoresis for identification of active drug candidates in myotonic dystrophy type 1. Anal Bioanal Chem 2018; 410:4495-4507. [DOI: 10.1007/s00216-018-1107-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 03/16/2018] [Accepted: 04/24/2018] [Indexed: 12/31/2022]
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25
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Ràfols C, Amézqueta S, Fuguet E, Bosch E. Molecular interactions between warfarin and human (HSA) or bovine (BSA) serum albumin evaluated by isothermal titration calorimetry (ITC), fluorescence spectrometry (FS) and frontal analysis capillary electrophoresis (FA/CE). J Pharm Biomed Anal 2018; 150:452-459. [DOI: 10.1016/j.jpba.2017.12.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 12/04/2017] [Accepted: 12/05/2017] [Indexed: 10/18/2022]
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26
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Li QQ, Li SY, Wang FQ, Chen H, Hu Y, Xia ZN, Yang FQ. Evaluation of the Interactions Between Platelets and Alkaloids by Frontal Analysis Capillary Electrophoresis Using Polyvinyl Alcohol-Coated Capillary. Chromatographia 2018. [DOI: 10.1007/s10337-018-3476-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Ramírez-García G, d’Orlyé F, Gutiérrez-Granados S, Martínez-Alfaro M, Mignet N, Richard C, Varenne A. Electrokinetic Hummel-Dreyer characterization of nanoparticle-plasma protein corona: The non-specific interactions between PEG-modified persistent luminescence nanoparticles and albumin. Colloids Surf B Biointerfaces 2017; 159:437-444. [DOI: 10.1016/j.colsurfb.2017.08.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/27/2017] [Accepted: 08/02/2017] [Indexed: 12/30/2022]
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28
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Du H, Zhang C, Mao K, Wang Y. A star-shaped poly(2-methyl-2-oxazoline)-based antifouling coating: Application in investigation of the interaction between acetaminophen and bovine serum albumin by frontal analysis capillary electrophoresis. Talanta 2017; 170:275-285. [DOI: 10.1016/j.talanta.2017.04.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/27/2017] [Accepted: 04/05/2017] [Indexed: 12/01/2022]
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29
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Mohammad HK, Alzweiri MH, Khanfar MA, Al-Hiari YM. 6-Substituted nicotinic acid analogues, potent inhibitors of CAIII, used as therapeutic candidates in hyperlipidemia and cancer. Med Chem Res 2017. [DOI: 10.1007/s00044-017-1825-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Xu Y, Hong T, Chen X, Ji Y. Affinity capillary electrophoresis and fluorescence spectroscopy for studying enantioselective interactions between omeprazole enantiomer and human serum albumin. Electrophoresis 2017; 38:1366-1373. [DOI: 10.1002/elps.201600375] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 02/10/2017] [Accepted: 02/13/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Yujing Xu
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
| | - Tingting Hong
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
| | - Xueping Chen
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
| | - Yibing Ji
- Department of Analytical Chemistry; P.R. China Pharmaceutical University; Nanjing P.R. China
- Key Laboratory of Drug Quality Control and Pharmacovigilance; Ministry of Education; Nanjing P.R. China
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31
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Zhang Y, Sha Y, Qian K, Chen X, Chen Q. Comparison of three methods for analyzing loureirin B and human serum albumin interaction using capillary electrophoresis. Electrophoresis 2017; 38:1038-1043. [DOI: 10.1002/elps.201600529] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 12/16/2016] [Accepted: 12/24/2016] [Indexed: 01/15/2023]
Affiliation(s)
- Yuelin Zhang
- Shanghai Key Lab Bioenergy Crops, School of Life Sciences; Shanghai University; Shanghai P. R. China
| | - Yijie Sha
- Shanghai Key Lab Bioenergy Crops, School of Life Sciences; Shanghai University; Shanghai P. R. China
| | - Kai Qian
- Shanghai Institute of Biological Products Co., Ltd.; Shanghai P. R. China
| | - Xu Chen
- Experimental Center for Life Science; Shanghai University; Shanghai P. R. China
| | - Qin Chen
- Shanghai Key Lab Bioenergy Crops, School of Life Sciences; Shanghai University; Shanghai P. R. China
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32
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Xu M, Liu C, Zhou M, Li Q, Wang R, Kang J. Screening of Small-Molecule Inhibitors of Protein–Protein Interaction with Capillary Electrophoresis Frontal Analysis. Anal Chem 2016; 88:8050-7. [DOI: 10.1021/acs.analchem.6b01430] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mei Xu
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China
| | - Chao Liu
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China
| | - Mi Zhou
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China
| | - Qing Li
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China
| | - Renxiao Wang
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China
| | - Jingwu Kang
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Road 345, Shanghai 200032, China
- ShanghaiTech University, Yueyang Road
319, Shanghai 200031, China
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33
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Duan HB, Cao JT, Yang JJ, Wang H, Liu YM. Simultaneous determination of four local anesthetics by CE with ECL and study on interaction between procainamide and human serum albumin. Talanta 2016; 154:341-5. [DOI: 10.1016/j.talanta.2016.03.093] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 03/23/2016] [Accepted: 03/28/2016] [Indexed: 01/18/2023]
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34
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Neaga I, Bodoki E, Hambye S, Blankert B, Oprean R. Study of nucleic acid–ligand interactions by capillary electrophoretic techniques: A review. Talanta 2016; 148:247-56. [DOI: 10.1016/j.talanta.2015.10.077] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/21/2015] [Accepted: 10/25/2015] [Indexed: 10/22/2022]
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35
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Nachbar M, El Deeb S, Mozafari M, Alhazmi HA, Preu L, Redweik S, Lehmann WD, Wätzig H. Ca2+-complex stability of GAPAGPLIVPY peptide in gas and aqueous phase, investigated by affinity capillary electrophoresis and molecular dynamics simulations and compared to mass spectrometric results. Electrophoresis 2016; 37:744-51. [DOI: 10.1002/elps.201500403] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/06/2015] [Accepted: 11/26/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Markus Nachbar
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Sami El Deeb
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Mona Mozafari
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Hassan A. Alhazmi
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Lutz Preu
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Sabine Redweik
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
| | - Wolf Dieter Lehmann
- Core Facility Molecular Structure Analysis; German Cancer Research Center (DKFZ); Heidelberg Germany
| | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
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36
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Duan HB, Cao JT, Wang H, Liu YM. Sensitive CE-ECL method with AuNPs-enhanced signal for the detection of β-blockers and the study of drug–protein interactions. RSC Adv 2016. [DOI: 10.1039/c6ra07003e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A sensitive capillary electrophoresis (CE) system coupled with electrochemiluminescence (ECL) of tris(2,2′-bipyridyl) ruthenium (ii) is described for the detection of propranolol (Pro) and acebutolol (Ace).
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Affiliation(s)
- Hong-Bing Duan
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- China
- Key Laboratory of Simulation and Control for Dabie Mountains Population Ecology
| | - Jun-Tao Cao
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- China
- Key Laboratory of Simulation and Control for Dabie Mountains Population Ecology
| | - Hui Wang
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- China
- Key Laboratory of Simulation and Control for Dabie Mountains Population Ecology
| | - Yan-Ming Liu
- College of Chemistry and Chemical Engineering
- Xinyang Normal University
- Xinyang 464000
- China
- Key Laboratory of Simulation and Control for Dabie Mountains Population Ecology
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37
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Application of capillary electrophoresis-frontal analysis for comparative evaluation of the binding interaction of captopril with human serum albumin in the absence and presence of hydrochlorothiazide. J Pharm Biomed Anal 2015; 115:31-5. [DOI: 10.1016/j.jpba.2015.06.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 06/12/2015] [Accepted: 06/17/2015] [Indexed: 12/19/2022]
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38
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Andrási M, Lehoczki G, Nagy Z, Gyémánt G, Pungor A, Gáspár A. A comparative study of capillary electrophoresis and isothermal titration calorimetry for the determination of binding constant of human serum albumin to monoclonal antibody. Electrophoresis 2015; 36:1274-81. [DOI: 10.1002/elps.201400513] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 12/02/2014] [Accepted: 12/11/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Melinda Andrási
- Department of Inorganic and Analytical Chemistry; University of Debrecen; Debrecen Hungary
| | - Gábor Lehoczki
- Department of Inorganic and Analytical Chemistry; University of Debrecen; Debrecen Hungary
| | - Zoltán Nagy
- Department of Colloid and Environmental Chemistry; University of Debrecen; Debrecen Hungary
| | - Gyöngyi Gyémánt
- Department of Inorganic and Analytical Chemistry; University of Debrecen; Debrecen Hungary
| | - András Pungor
- Department of Experimental Physics; University of Debrecen; Debrecen Hungary
| | - Attila Gáspár
- Department of Inorganic and Analytical Chemistry; University of Debrecen; Debrecen Hungary
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39
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Wynne TM, McCallum C, Del Bonis-O’Donnell JT, Crisalli P, Pennathur S. Hybridization Thermodynamics of DNA Oligonucleotides during Microchip Capillary Electrophoresis. Anal Chem 2015; 87:2811-8. [DOI: 10.1021/ac504209m] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Thomas M. Wynne
- Department
of Mechanical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Christopher McCallum
- Department
of Mechanical Engineering, University of California, Santa Barbara, California 93106, United States
| | | | - Pete Crisalli
- Department
of Mechanical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Sumita Pennathur
- Department
of Mechanical Engineering, University of California, Santa Barbara, California 93106, United States
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40
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Michalcová L, Glatz Z. Comparison of various capillary electrophoretic approaches for the study of drug-protein interaction with emphasis on minimal consumption of protein sample and possibility of automation. J Sep Sci 2014; 38:325-31. [PMID: 25363623 DOI: 10.1002/jssc.201400914] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 10/24/2014] [Accepted: 10/24/2014] [Indexed: 11/08/2022]
Abstract
The binding ability of a drug to plasma proteins influences the pharmacokinetics of a drug. As a result, it is a very important issue in new drug development. In this study, affinity capillary electrophoresis, capillary electrophoresis with frontal analysis, and Hummel Dreyer methods with internal and external calibration were used to study the affinity between bovine serum albumin and salicylic acid. The binding constant was measured by all these approaches including the equilibrium dialysis, which is considered to be a reference method. The comparison of results and other considerations showed the best electrophoretic approach to be capillary electrophoresis-frontal analysis, which is characterized by the high sample throughput with the possibility of automation, very small quantities of biomacromolecules, simplicity, and a short analysis time. The mechanism of complex formation was then examined by capillary electrophoresis with frontal analysis. The binding parameters were determined and the corresponding thermodynamic parameters such as Gibbs free energy ΔG(0), enthalpy ΔH(0), and entropy changes ΔS(0) at various temperatures were calculated. The results showed that the binding of bovine serum albumin and salicylic acid was spontaneous, and that hydrogen bonding and van der Waals forces played a major role in the formation of the complex.
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Affiliation(s)
- Lenka Michalcová
- Department of Biochemistry, Faculty of Science and CEITEC-Central European Institute of Technology, Masaryk University, Brno, Czech Republic
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41
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Molecular interactions between some non-steroidal anti-inflammatory drugs (NSAID׳s) and bovine (BSA) or human (HSA) serum albumin estimated by means of isothermal titration calorimetry (ITC) and frontal analysis capillary electrophoresis (FA/CE). Talanta 2014; 130:241-50. [DOI: 10.1016/j.talanta.2014.06.060] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 06/19/2014] [Accepted: 06/26/2014] [Indexed: 11/16/2022]
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42
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Ultrasonic microdialysis coupled with capillary electrophoresis electrochemiluminescence study the interaction between trimetazidine dihydrochloride and human serum albumin. Anal Chim Acta 2014; 851:37-42. [DOI: 10.1016/j.aca.2014.08.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/01/2014] [Accepted: 08/06/2014] [Indexed: 11/19/2022]
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43
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Zheng X, Li Z, Beeram S, Podariu M, Matsuda R, Pfaunmiller EL, White CJ, Carter N, Hage DS. Analysis of biomolecular interactions using affinity microcolumns: a review. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 968:49-63. [PMID: 24572459 PMCID: PMC4112177 DOI: 10.1016/j.jchromb.2014.01.026] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 01/16/2014] [Accepted: 01/19/2014] [Indexed: 12/15/2022]
Abstract
Affinity chromatography has become an important tool for characterizing biomolecular interactions. The use of affinity microcolumns, which contain immobilized binding agents and have volumes in the mid-to-low microliter range, has received particular attention in recent years. Potential advantages of affinity microcolumns include the many analysis and detection formats that can be used with these columns, as well as the need for only small amounts of supports and immobilized binding agents. This review examines how affinity microcolumns have been used to examine biomolecular interactions. Both capillary-based microcolumns and short microcolumns are considered. The use of affinity microcolumns with zonal elution and frontal analysis methods are discussed. The techniques of peak decay analysis, ultrafast affinity extraction, split-peak analysis, and band-broadening studies are also explored. The principles of these methods are examined and various applications are provided to illustrate the use of these methods with affinity microcolumns. It is shown how these techniques can be utilized to provide information on the binding strength and kinetics of an interaction, as well as on the number and types of binding sites. It is further demonstrated how information on competition or displacement effects can be obtained by these methods.
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Affiliation(s)
- Xiwei Zheng
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Zhao Li
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Sandya Beeram
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Maria Podariu
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Ryan Matsuda
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Erika L Pfaunmiller
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - Christopher J White
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - NaTasha Carter
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA.
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44
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Zeng HJ, Yang R, Zhang Y, Li JJ, Qu LB. Capillary electrophoresis coupled with electrochemiluminescence for determination of atomoxetine hydrochloride and the study on its interactions with three proteins. LUMINESCENCE 2014; 30:124-30. [DOI: 10.1002/bio.2700] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 03/27/2014] [Accepted: 04/04/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Hua-jin Zeng
- School of Pharmaceutical Sciences; Zhengzhou University; Zhengzhou 450001 China
| | - Ran Yang
- Department of Chemistry; Zhengzhou University; Zhengzhou 450001 China
| | - Ying Zhang
- Department of Chemistry; Zhengzhou University; Zhengzhou 450001 China
| | - Jian-jun Li
- Department of Chemistry; Zhengzhou University; Zhengzhou 450001 China
| | - Ling-bo Qu
- Department of Chemistry; Zhengzhou University; Zhengzhou 450001 China
- College of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou 450001 China
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45
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Zhao L, Chen D. Characterization of interactions between methoxatin disodium salt and human serum albumin by pressure-assisted capillary electrophoresis/frontal analysis and circular dichroism spectroscopy. Biomed Chromatogr 2014; 29:123-8. [DOI: 10.1002/bmc.3248] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 04/01/2014] [Accepted: 04/17/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Lijuan Zhao
- Laboratory of Pharmaceutical Analysis, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 People's Republic of China
| | - Dongying Chen
- Laboratory of Pharmaceutical Analysis, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 People's Republic of China
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46
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Sisavath N, Le Saux T, Leclercq L, Cottet H. Effect of dendrimer generation on the interactions between human serum albumin and dendrigraft polylysines. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4450-4457. [PMID: 24708346 DOI: 10.1021/la5002144] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This work aims at studying the interaction between human serum albumin and different generations of dendrigraft poly-L-lysine (DGL) in physiological conditions. The binding constants and stoichiometry of the interaction were successfully determined using frontal analysis continuous capillary electrophoresis. The effect of generation on the interaction was evaluated for the five first generations of DGL. An increase of the binding constant accompanied with a decrease of the HSA:DGL (1:n) stoichiometry and a decrease of the cooperativity with dendrimer generation was observed. These findings were in good agreement with the increase of ligand (DGL) size, the increase of electrostatic ligand-ligand repulsion, and the localization of two negatively charged interaction sites on the HSA. The effect of the ligand topology (linear vs dendrigraft) on the HSA interaction revealed that linear poly(L-lysine) leads to much lower stoichiometry compared to DGL of similar molar mass due to much higher flexibility and contour length.
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Affiliation(s)
- Nicolas Sisavath
- Institut des Biomolécules Max Mousseron, UMR 5247 CNRS-Université de Montpellier 1-Université de Montpellier 2 , place Eugène Bataillon CC 1706, 34095 Montpellier Cedex 5, France
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47
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Li Q, Bian L, Zhao X, Gao X, Zheng J, Li Z, Zhang Y, Jiang R, Zheng X. Immobilised histidine tagged β2-adrenoceptor oriented by a diazonium salt reaction and its application in exploring drug-protein interaction using ephedrine and pseudoephedrine as probes. PLoS One 2014; 9:e94955. [PMID: 24747442 PMCID: PMC3991622 DOI: 10.1371/journal.pone.0094955] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 03/21/2014] [Indexed: 02/06/2023] Open
Abstract
A new oriented method using a diazonium salt reaction was developed for linking β2-adrenoceptor (β2-AR) on the surface of macroporous silica gel. Stationary phase containing the immobilised receptor was used to investigate the interaction between β2-AR and ephedrine plus pseudoephedrine by zonal elution. The isotherms of the two drugs best fit the Langmuir model. Only one type of binding site was found for ephedrine and pseudoephedrine targeting β2-AR. At 37 °C, the association constants during the binding were (5.94±0.05)×103/M for ephedrine and (3.80±0.02) ×103/M for pseudoephedrine, with the binding sites of (8.92±0.06) ×10−4 M. Thermodynamic studies showed that the binding of the two compounds to β2-AR was a spontaneous reaction with exothermal processes. The ΔGθ, ΔHθ and ΔSθ for the interaction between ephedrine and β2-AR were −(22.33±0.04) kJ/mol, −(6.51±0.69) kJ/mol and 50.94±0.31 J/mol·K, respectively. For the binding of pseudoephedrine to the receptor, these values were −(21.17±0.02) kJ/mol, −(7.48±0.56) kJ/mol and 44.13±0.01 J/mol·K. Electrostatic interaction proved to be the driving force during the binding of the two drugs to β2-AR. The proposed immobilised method will have great potential for attaching protein to solid substrates and realizing the interactions between proteins and drugs.
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Affiliation(s)
- Qian Li
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, China
| | - Liujiao Bian
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, China
| | - Xinfeng Zhao
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, China
| | - Xiaokang Gao
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, China
| | - Jianbin Zheng
- Institute of Analytical Science, Northwest University, Xi'an, Shaanxi, China
| | - Zijian Li
- Institute of Vascular Medicine, Peking University; Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, China
| | - Youyi Zhang
- Institute of Vascular Medicine, Peking University; Third Hospital and Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing, China
- * E-mail: (YZ); (XZ)
| | - Ru Jiang
- School of Pharmacy, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaohui Zheng
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, China
- * E-mail: (YZ); (XZ)
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48
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Simultaneous quantitation of 5- and 7-hydroxyflavone antioxidants and their binding constants with BSA using dual chiral capillary electrophoresis (dCCE) and HPLC with fluorescent detection. Talanta 2014; 119:417-24. [DOI: 10.1016/j.talanta.2013.11.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 11/06/2013] [Accepted: 11/08/2013] [Indexed: 12/27/2022]
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49
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Riesová M, Svobodová J, Tošner Z, Beneš M, Tesařová E, Gaš B. Complexation of Buffer Constituents with Neutral Complexation Agents: Part I. Impact on Common Buffer Properties. Anal Chem 2013; 85:8518-25. [DOI: 10.1021/ac4013804] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martina Riesová
- Charles University in Prague, Faculty of Science, Department of Physical
and Macromolecular Chemistry, Prague, Czech Republic
| | - Jana Svobodová
- Charles University in Prague, Faculty of Science, Department of Physical
and Macromolecular Chemistry, Prague, Czech Republic
| | - Zdeněk Tošner
- Charles University in Prague, Faculty of Science, Department of Chemistry,
Prague, Czech Republic
| | - Martin Beneš
- Charles University in Prague, Faculty of Science, Department of Physical
and Macromolecular Chemistry, Prague, Czech Republic
| | - Eva Tesařová
- Charles University in Prague, Faculty of Science, Department of Physical
and Macromolecular Chemistry, Prague, Czech Republic
| | - Bohuslav Gaš
- Charles University in Prague, Faculty of Science, Department of Physical
and Macromolecular Chemistry, Prague, Czech Republic
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50
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Redweik S, Cianciulli C, Hara M, Xu Y, Wätzig H. Precise, fast and flexible determination of protein interactions by affinity capillary electrophoresis. Part 2: Cations. Electrophoresis 2013; 34:1812-9. [DOI: 10.1002/elps.201300050] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 02/21/2013] [Accepted: 02/21/2013] [Indexed: 12/20/2022]
Affiliation(s)
- Sabine Redweik
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig; Germany
| | - Claudia Cianciulli
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig; Germany
| | - Masakazu Hara
- Department of Applied Biological Chemistry; Shizuoka University; Shizuoka; Japan
| | | | - Hermann Wätzig
- Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig; Germany
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