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Bržezická T, Mlčochová H, Glatz Z, Kohútová L. Contactless conductivity detector as a tool for improving universality and sensitivity of capillary electrophoresis-frontal analysis: Proof of concept. J Sep Sci 2024; 47:e2300667. [PMID: 38234025 DOI: 10.1002/jssc.202300667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/13/2023] [Accepted: 12/05/2023] [Indexed: 01/19/2024]
Abstract
Drug binding to plasma proteins influences processes such as liberation, adsorption, disposition, metabolism, and elimination of drugs, which are thus one of the key steps of a new drug development. As a result, the characterization of drug-protein interactions is an essential part of these time- and money-consuming processes. It is important to determine not only the binding strength and the stoichiometry of interaction, but also the binding site of a drug on a protein molecule, because two drugs with the same binding site can mutually affect free drug concentration. Capillary electrophoresis-frontal analysis with mobility shift affinity capillary electrophoresis is one of the most used affinity capillary electrophoresis methods for the characterization of these interactions. In this study, a well-known sensitivity problem of most capillary electrophoresis-frontal analyses using ultraviolet detection is solved by its combination with contactless conductivity detection, which provided sixfold lower limits of quantitation and detection. Binding parameters of the human serum albumin-salicylic acid model affinity pair were evaluated by this newly developed approach and by the classical approach with ultraviolet detection primarily used for their mutual comparison. The results of both approaches agreed well and are also in agreement 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
| | - Hana Mlčochová
- 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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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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Malburet C, Leclercq L, Cotte JF, Thiebaud J, Cottet H. Study of Interactions between Antigens and Polymeric Adjuvants in Vaccines by Frontal Analysis Continuous Capillary Electrophoresis. Biomacromolecules 2020; 21:3364-3373. [PMID: 32609507 DOI: 10.1021/acs.biomac.0c00782] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Vaccine adjuvants are used to enhance the immune response induced by antigens that have insufficient immunostimulatory capabilities. The present work aims at developing a frontal analysis continuous capillary electrophoresis (FACCE) methodology for the study of antigen-adjuvant interactions in vaccine products. After method optimization using three cationic model proteins, namely lysozyme, cytochrome c, and ribonuclease A, FACCE was successfully implemented to quantify the free antigen and thus to determine the interaction parameters (stoichiometry and binding constant) between an anionic polymeric adjuvant (polyacrylic acid, SPA09) and a cationic vaccine antigen in development for the treatment for Staphylococcus aureus. The influence of the ionic strength of the medium on the interactions was investigated. A strong dependence of the binding parameters with the ionic strength was observed. The concentration of the polymeric adjuvant was also found to significantly modify the ionic strength of the formulation, the extent of which could be estimated and corrected.
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Affiliation(s)
- Camille Malburet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France.,Analytical Sciences, Sanofi Pasteur, 1541 Avenue Marcel Mérieux, Marcy-l'Étoile 69280, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Jean-François Cotte
- Analytical Sciences, Sanofi Pasteur, 1541 Avenue Marcel Mérieux, Marcy-l'Étoile 69280, France
| | - Jérôme Thiebaud
- Analytical Sciences, Sanofi Pasteur, 1541 Avenue Marcel Mérieux, Marcy-l'Étoile 69280, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
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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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Müller LS, Muratt DT, Molin TRD, Urquhart CG, Viana C, de Carvalho LM. Analysis of Pharmacologic Adulteration in Dietary Supplements by Capillary Zone Electrophoresis Using Simultaneous Contactless Conductivity and UV Detection. Chromatographia 2018. [DOI: 10.1007/s10337-018-3496-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Huang Y, Yang Z, Xu H, Zhang P, Gao Z, Li H. Insulin enhances the peroxidase activity of heme by forming heme-insulin complex: Relevance to type 2 diabetes mellitus. Int J Biol Macromol 2017; 102:1009-1015. [DOI: 10.1016/j.ijbiomac.2017.04.113] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 04/26/2017] [Accepted: 04/28/2017] [Indexed: 12/12/2022]
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Ye F, Xie Y, Jensen H, Larsen SW, Yaghmur A, Larsen C, Østergaard J. Interaction of Amino Acid and Dipeptide β-Naphthylamide Derivatives with Hyaluronic Acid and Human Serum Albumin Studied by Capillary Electrophoresis Frontal Analysis. Chromatographia 2012. [DOI: 10.1007/s10337-012-2369-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Opekar F, Štulík K. Some important combinations of detection techniques for electrophoresis in capillaries and on chips with emphasis on electrochemical principles. Electrophoresis 2011; 32:795-810. [DOI: 10.1002/elps.201000455] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 10/01/2010] [Accepted: 10/07/2010] [Indexed: 11/08/2022]
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Lin X, Colyer CL. Chromatographic and Electrophoretic Methods for the Determination of Binding Constants for Dye-Protein Complexes. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826070802126312] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Xiuli Lin
- a Department of Chemistry , Wake Forest University , Winston-Salem, North Carolina, USA
- b School of Pharmaceutical Sciences, Shandong University , Jinan, P. R. China
| | - Christa L. Colyer
- a Department of Chemistry , Wake Forest University , Winston-Salem, North Carolina, USA
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Timerbaev AR. Inorganic species analysis by CE â An overview for 2007â2008. Electrophoresis 2010; 31:192-204. [DOI: 10.1002/elps.200900397] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Study of nobiletin binding to bovine serum albumin by capillary electrophoresis-frontal analysis and circular dichroism. Biomed Chromatogr 2010; 24:1023-8. [DOI: 10.1002/bmc.1403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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LI X, TONG YL, LIU C, LI OL, YANG XJ, CHEN ZG. Dual Detection Methods for Microchip and Conventional Capillary Electrophoreses. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2009. [DOI: 10.1016/s1872-2040(08)60138-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Separation of fluoroquinolones in acidic buffer by capillary electrophoresis with contactless conductivity detection. J Chromatogr A 2009; 1216:5327-32. [DOI: 10.1016/j.chroma.2009.05.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2009] [Revised: 05/06/2009] [Accepted: 05/08/2009] [Indexed: 11/17/2022]
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Liu X, Dahdouh F, Salgado M, Gomez FA. Recent Advances in Affinity Capillary Electrophoresis (2007). J Pharm Sci 2009; 98:394-410. [DOI: 10.1002/jps.21452] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Kubáň P, Hauser PC. Ten years of axial capacitively coupled contactless conductivity detection for CZE - a review. Electrophoresis 2009; 30:176-88. [DOI: 10.1002/elps.200800478] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zhao P, Zhu G, Zhang W, Zhang L, Liang Z, Zhang Y. Study of multiple binding constants of dexamethasone with human serum albumin by capillary electrophoresis–frontal analysis and multivariate regression. Anal Bioanal Chem 2008; 393:257-61. [DOI: 10.1007/s00216-008-2373-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2008] [Revised: 08/21/2008] [Accepted: 08/25/2008] [Indexed: 11/24/2022]
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Østergaard J, Jorgensen L, Engelbrecht Thomsen A, Weng Larsen S, Larsen C, Jensen H. Drug-liposome distribution phenomena studied by capillary electrophoresis-frontal analysis. Electrophoresis 2008; 29:3320-4. [DOI: 10.1002/elps.200700757] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Research Spotlight: J. Sep. Sci. 10/2008. J Sep Sci 2008. [DOI: 10.1002/jssc.200890036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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A review of the recent achievements in capacitively coupled contactless conductivity detection. Anal Chim Acta 2008; 607:15-29. [DOI: 10.1016/j.aca.2007.11.045] [Citation(s) in RCA: 215] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Revised: 11/22/2007] [Accepted: 11/27/2007] [Indexed: 11/21/2022]
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Jensen H, Østergaard J, Hansen SH. CE frontal analysis employing contactless conductivity detection for determination of CMCs of non-UV absorbing charged surfactants. Electrophoresis 2007; 28:2975-80. [PMID: 17661318 DOI: 10.1002/elps.200700236] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Micellar systems composed of surfactants are used extensively in academia and industry for many different applications. In this work a highly versatile CE method for determination of CMCs of charged surfactants has been developed. In the case of positively charged surfactants a coating procedure of the fused-silica capillary was used, whereas negatively charged surfactants were analyzed using uncoated capillaries. The CE method is based on frontal analysis (FA) employing use of contactless conductivity and UV detection. The main advantages of the method are that it can be used for non-UV absorbing surfactants without introducing marker compounds which previously has been found to affect CMCs, requires very limited sample volume and is easily implemented and automated using standard CE equipment. The fact that counterions and different aggregated states are separated allows a detailed characterization of the micelle systems using the developed method. In the case of UV absorbing surfactants similar results were obtained employing contactless conductivity and UV detection. Finally, CMCs obtained using conductometry gave similar results as compared to the developed CE-FA procedure.
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Affiliation(s)
- Henrik Jensen
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Copenhagen, Denmark.
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