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Bržezická T, Kohútová L, Glatz Z. Atypical applications of transverse diffusion of laminar flow profiles methodology for in-capillary reactions in capillary electrophoresis. J Sep Sci 2024; 47:e2400157. [PMID: 38982555 DOI: 10.1002/jssc.202400157] [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: 02/29/2024] [Revised: 06/20/2024] [Accepted: 06/24/2024] [Indexed: 07/11/2024]
Abstract
Capillary electrophoresis (CE) is a powerful separation technique offering quick and efficient analyses in various fields of bioanalytical chemistry. It is characterized by many well-known advantages, but one, which is perhaps the most important for this application field, is somewhat overlooked. It is the possibility to perform chemical and biochemical reactions at the nL scale inside the separation capillary. There are two basic formats applicable for this purpose, heterogeneous and homogeneous. In the former, one reactant is immobilized onto a particle or monolithic support or directly on the capillary wall, and the other is injected. In the latter, the reactant mixing inside a capillary is based on electromigration or diffusion. One of the diffusion-based methodologies, termed Transverse Diffusion of Laminar Flow Profiles, is the subject of this review. Since most studies utilizing in-capillary reactions in CE focus on enzymes, which are being continuously and exhaustively reviewed, this review covers the atypical applications of this methodology, but still in the bioanalytical field. As can be seen from the demonstrated applications, they are not limited to reactions, but can also be utilized for other biochemical systems.
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Affiliation(s)
- Taťána Bržezická
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lenka Kohútová
- 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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2
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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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3
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Zhang Y, Sang CY, Wang XR, Wang CB, Meng XH, Wang WF, Yang JL. Rapid evaluation of PHD2 inhibitory activity of natural products based on capillary electrophoresis online stacking strategy. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1236:124064. [PMID: 38430605 DOI: 10.1016/j.jchromb.2024.124064] [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: 11/07/2023] [Revised: 02/18/2024] [Accepted: 02/20/2024] [Indexed: 03/05/2024]
Abstract
Prolyl hydroxylase domain 2 (PHD2) is an important enzyme in the human body that perceives changes in oxygen concentration and regulates response in hypoxic environments. Evaluation of PHD2 inhibitory activity of natural products is crucial for drug development of hypoxia related diseases. At present, the detection of low concentration of α-ketoglutaric acid (the substrate of PHD2 enzymatic reaction) requires derivatization reactions or sample pretreatment, which undoubtedly increases the workload of PHD2 inhibitory activity evaluation. In this paper, a direct detection approach of α-ketoglutaric acid was established by using the online stacking strategy of capillary electrophoresis to evaluate the PHD2 inhibitory activity of natural products. Under optimized conditions, detection of a single sample can be achieved within 2 min. By calculation, the intraday precision RSD of the apparent electrophoretic mobility and peak areas of α-ketoglutaric acid are 0.92 % and 0.79 %, respectively, and the interday RSD were 1.27 % and 0.96 % respectively. The recoveries of the present approach were 97.9-105.2 %, and the LOQ and LOD were 2.0 μM and 5.0 μM, respectively. Furthermore, this approach was applied for the evaluation of inhibitory activity of PHD2 for 13 natural products, and PHD2 inhibitory activity of salvianolic acid A was firstly reported. The present work not only realizes evaluation of PHD2 inhibitory activity through direct detection of α-ketoglutaric acid, but also provides technical support for the discovery of potential drug molecules in hypoxia related diseases.
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Affiliation(s)
- Ying Zhang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, PR China
| | - Chun-Yan Sang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, PR China
| | - Xing-Rong Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, PR China
| | - Cheng-Bo Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, PR China
| | - Xian-Hua Meng
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, PR China
| | - Wei-Feng Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, PR China.
| | - Jun-Li Yang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou 730000, PR China.
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4
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Casto-Boggess LD, Holland LA. Fluorescent parallel electrophoresis assay of enzyme inhibition. Anal Chim Acta 2024; 1296:342268. [PMID: 38401944 PMCID: PMC10911858 DOI: 10.1016/j.aca.2024.342268] [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: 10/14/2023] [Revised: 01/14/2024] [Accepted: 01/17/2024] [Indexed: 02/26/2024]
Abstract
BACKGROUND Enzyme inhibitors comprise the largest class of pharmaceutical compounds. The discovery and development of new enzyme inhibitor drug candidates depends on sensitive tools to quantify inhibition constants, Ki, for the most promising candidates. A high throughput, automated, and miniaturized approach to measure inhibition is reported. In this technique enzyme inhibition occurs within a 16 nL nanogel reaction zone that is integrated into a capillary. The reaction and electrophoresis separation are completed in under 10 min. The nanoliter enzyme reaction zones are easily positioned inside a standard separation capillary by pseudo-immobilizing enzymes within a thermally reversible nanogel. RESULTS This report optimizes and validates a capillary nanogel electrophoresis reaction and separation with a multi-capillary array instrument. Inhibitor constants are determined for the neuraminidase enzyme to quantify the effect of the transition state analog, 2,3-dehydro-2-deoxy-N-acetylneuraminic acid (DANA), as well as the inhibitor Siastatin B. With the multi-capillary array assay replicate Ki values are determined to be 5.7 ± 0.1 μM (n = 3) and 9.2 ± 0.2 μM (n = 3) for DANA and Siastatin B, respectively. The enzyme reaction in each separation capillary converts the substrate to a product in real time. The nanogel is used under suppressed electroosmotic flow, sustains enzyme function, and is easily filled and replaced by changing the capillary temperature. Using laser-induced fluorescence allows the determination to be achieved with substrate concentrations well below the Michaelis-Menten constant, making the method independent of the substrate concentration and therefore a more easily implemented assay. SIGNIFICANCE A lower measurement cost is realized when the reaction volume is miniaturized because the amounts of enzyme, substrate and inhibitor are reduced. Fast enzyme reactions are possible because of the small reaction volume. With a multi-capillary array, the inhibition assay is achieved in a fraction of the time required for traditional methods. The separation-based assay can even be applied to labeled substrates not cleaned up following the labeling reaction.
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Affiliation(s)
- Laura D Casto-Boggess
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Lisa A Holland
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA.
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Qiu X, Hou X, Yang Y, Fang H, Cui F, Yang X. An in-line method for high-throughput screening of protein tyrosine phosphatase receptor type O inhibitors by capillary electrophoresis based on electrophoretically mediated microanalysis. J Chromatogr A 2024; 1713:464511. [PMID: 38007841 DOI: 10.1016/j.chroma.2023.464511] [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: 09/18/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 11/28/2023]
Abstract
Protein tyrosine phosphatase receptor type O (PTPRO) plays an important role in inflammation-related pathways and has become an emerging drug target. In this study, we developed an in-line capillary electrophoresis (CE) method for the investigation of the enzymatic activity of PTPRO, which was based on electrophoretically mediated microanalysis (EMMA). After a thorough method validation of the optimized conditions, this protocol was successfully employed to determine the kinetics of PTPRO as well as the half-maximal inhibitory concentration (IC50) of two typical PTPRO inhibitors. The final results were consistent with the values obtained through classical ultraviolet-visible (UV-vis) spectrophotometry. Our new method exhibited improved accuracy and reduced consumption, avoiding the disadvantages of traditional methods. This work provides a new strategy for PTPRO enzyme kinetic studies as well as inhibitory activity determination through capillary electrophoresis for the first time.
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Affiliation(s)
- Xueting Qiu
- Department of Pharmaceutical Analysis and Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 250012 Jinan, Shandong, PR China
| | - Xuben Hou
- Department of Medicinal Chemistry and Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 250012 Jinan, Shandong, PR China
| | - Yue Yang
- School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 250012 Jinan, Shandong, PR China
| | - Hao Fang
- Department of Medicinal Chemistry and Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 250012 Jinan, Shandong, PR China
| | - Fei Cui
- Department of Pharmaceutical Analysis and Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 250012 Jinan, Shandong, PR China
| | - Xinying Yang
- Department of Pharmaceutical Analysis and Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 250012 Jinan, Shandong, PR China.
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2021-mid-2023). Electrophoresis 2024; 45:165-198. [PMID: 37670208 DOI: 10.1002/elps.202300152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/22/2023] [Accepted: 08/22/2023] [Indexed: 09/07/2023]
Abstract
This review article brings a comprehensive survey of developments and applications of high-performance capillary and microchip electromigration methods (zone electrophoresis in a free solution or in sieving media, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) for analysis, micropreparation, and physicochemical characterization of peptides in the period from 2021 up to ca. the middle of 2023. Progress in the study of electromigration properties of peptides and various aspects of their analysis, such as sample preparation, adsorption suppression, electroosmotic flow regulation, and detection, are presented. New developments in the particular capillary electromigration methods are demonstrated, and several types of their applications are reported. They cover qualitative and quantitative analysis of synthetic or isolated peptides and determination of peptides in complex biomatrices, peptide profiling of biofluids and tissues, and monitoring of chemical and enzymatic reactions and physicochemical changes of peptides. They include also amino acid and sequence analysis of peptides, peptide mapping of proteins, separation of stereoisomers of peptides, and their chiral analyses. In addition, micropreparative separations and physicochemical characterization of peptides and their interactions with other (bio)molecules by the above CE methods are described.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
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Siebert DA, Caon NB, Alberton MD, Vitali L, Parize AL, Micke GA. Immobilized acetylcholinesterase in magnetic nanoparticles for in-line inhibition studies using a capillary electrophoresis system. Anal Chim Acta 2023; 1275:341566. [PMID: 37524460 DOI: 10.1016/j.aca.2023.341566] [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: 02/02/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 08/02/2023]
Abstract
Enzyme assays can be performed with the capillary electrophoresis technique (CE) in many approaches, such as the immobilized enzyme micro-reactor. Acetylcholinesterase is a promising enzyme to be used when pursuing such a method, as it has already been explored in the proposal of similar methods of miniaturizing enzyme assays. The present work proposes a novel enzyme micro-reactor, based on the anchorage of the enzyme on magnetic nanoparticles of MnFe2O4, with chitosan and glutaraldehyde as the cross-linker in the capillary by means of an arrange of neodymium magnets. The calculated Km of the enzyme evaluated by this method was 1.12 mmol L-1, comparable to other studies in the literature that utilizes immobilized enzymes. Also, IC50 for neostigmine was assessed in 3 different micro-reactors, with an average of 29.42 ± 3.88 μmol L-1. In terms of the micro-reactor stability, it was possible to perform at least 25 experiments with assembled micro-reactor. The method was applied to hydroalcoholic extracts of 7 plant species. Plinia cauliflora had the best result, with 42.31 ± 6.81% of enzyme inhibition in a concentration of 100 mg L-1.
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Affiliation(s)
- Diogo Alexandre Siebert
- Laboratório de Eletroforese Capilar, Departamento de Química, Universidade Federal de Santa Catarina, Trindade, CEP 88040-900, Florianópolis, SC, Brazil
| | - Natália Bruzamarello Caon
- Laboratório de Estudo em Materiais Poliméricos, Departamento de Química, Universidade Federal de Santa Catarina, Trindade, CEP 88040-900, Florianópolis, SC, Brazil
| | - Michele Debiasi Alberton
- Laboratório de Pesquisa em Produtos Naturais, Universidade Regional de Blumenau, Rua São Paulo 2171, CEP 89030-000, Blumenau, SC, Brazil
| | - Luciano Vitali
- Laboratório de Eletroforese Capilar, Departamento de Química, Universidade Federal de Santa Catarina, Trindade, CEP 88040-900, Florianópolis, SC, Brazil
| | - Alexandre Luis Parize
- Laboratório de Estudo em Materiais Poliméricos, Departamento de Química, Universidade Federal de Santa Catarina, Trindade, CEP 88040-900, Florianópolis, SC, Brazil
| | - Gustavo Amadeu Micke
- Laboratório de Eletroforese Capilar, Departamento de Química, Universidade Federal de Santa Catarina, Trindade, CEP 88040-900, Florianópolis, SC, Brazil.
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Liu J, Li M, Liu X, Huang J, Yang L. Ultrasensitive assay of O-GlcNAc transferase using capillary electrophoresis-laser induced fluorescence. Electrophoresis 2023; 44:53-61. [PMID: 35871308 DOI: 10.1002/elps.202200118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/09/2022] [Accepted: 07/19/2022] [Indexed: 02/01/2023]
Abstract
O-linked N-acetylglucosamine (O-GlcNAc) transferase (OGT) is directly associated with the level of O-GlcNAc glycosylation of biomolecules and various diseases, and it is expected to be a promising potential new therapeutic target. Here, we develop a robust and sensitive method for OGT assay based on capillary electrophoresis-laser induced fluorescence (CE-LIF) method. AF-488-modified peptide containing serine active group is designed as substrate for OGT-catalyzed reaction, and nonradioactive UDP-GlcNAc is employed as sugar donor to perform O-GlcNAc glycosylation modification. The enzyme activity of OGT is measured by quantitative determination of glycosylated peptide produced by the reaction. Large volume sample stacking technique for sample injection and a unique fluorescence collection system for LIF detection are adopted to greatly enhance the detection sensitivity, thus a low limit of detection down to 0.23 pM for OGT detection is achieved. The method is successfully applied to detect OGT activity in clinical blood samples with satisfactory accuracy. Our study provides a simple, accurate, and sensitive method with great potential application in clinical diagnosis of O-GlcNAc-related diseases.
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Affiliation(s)
- Jianing Liu
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry, Northeast Normal University, Changchun, P. R. China
| | - Minmin Li
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry, Northeast Normal University, Changchun, P. R. China
| | - Xiaojuan Liu
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry, Northeast Normal University, Changchun, P. R. China
| | - Jing Huang
- Laboratory Department of The First Hospital of Jilin University, Changchun, P. R. China
| | - Li Yang
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry, Northeast Normal University, Changchun, P. R. China
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Kašička V. Peptide mapping of proteins by capillary electromigration methods. J Sep Sci 2022; 45:4245-4279. [PMID: 36200755 DOI: 10.1002/jssc.202200664] [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: 08/16/2022] [Revised: 09/26/2022] [Accepted: 09/26/2022] [Indexed: 12/13/2022]
Abstract
This review article provides a wide overview of important developments and applications of capillary electromigration methods in the area of peptide mapping of proteins in the period 1997-mid-2022, including review articles on this topic. It deals with all major aspects of peptide mapping by capillary electromigration methods: i) precleavage sample preparation involving purification, preconcentration, denaturation, reduction and alkylation of protein(s) to be analyzed, ii) generation of peptide fragments by off-line or on-line enzymatic and/or chemical cleavage of protein(s), iii) postcleavage preparation of the generated peptide mixture for capillary electromigration separation, iv) separation of the complex peptide mixtures by one-, two- and multidimensional capillary electromigration methods coupled with mass spectrometry detection, and v) a large application of peptide mapping for variable purposes, such as qualitative analysis of monoclonal antibodies and other protein biopharmaceuticals, monitoring of posttranslational modifications, determination of primary structure and investigation of function of proteins in biochemical and clinical research, characterization of proteins of variable origin as well as for protein and peptide identification in proteomic and peptidomic studies.
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Affiliation(s)
- Václav Kašička
- Electromigration Methods, The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
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10
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Casto-Boggess LD, Holland LA, Lawer-Yolar PA, Lucas JA, Guerrette JR. Microscale Quantification of the Inhibition of Neuraminidase Using Capillary Nanogel Electrophoresis. Anal Chem 2022; 94:16151-16159. [PMID: 36343965 PMCID: PMC9686991 DOI: 10.1021/acs.analchem.2c03584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Neuraminidase inhibitors modulate infections that involve sialic acids, making quantitative analyses of this inhibitory effect important for selecting and designing potential therapeutics. An automated nanogel capillary electrophoresis system is developed that integrates a 5 nL enzyme inhibition reaction in line with a 5 min separation-based assay of the enzymatic product to quantify inhibition as the half maximal inhibitory concentration (IC50) and inhibitor constant (Ki). A neuraminidase enzyme from Clostridium perfringens is non-covalently immobilized in a thermally tunable nanogel positioned in the thermally controlled region of the capillary by increasing the capillary temperature to 37 °C. Aqueous inhibitor solutions are loaded into the capillary during the nanogel patterning step to surround the enzyme zone. The capillary electrophoresis separation provides a means to distinguish the de-sialylated product, enabling the use of sialyllactose which contains the trisaccharide motif observed on serine/threonine-linked (O-linked) glycans. A universal nanogel patterning scheme is developed that does not require pre-mixing of enzymes with inhibitors when an automated capillary electrophoresis instrument is used, thus reducing the consumption of enzymes and enabling adaption of the method to different inhibitors. The universal approach is successfully applied to two classical neuraminidase inhibitors with different electrophoretic mobilities. The IC50 and Ki values obtained for N-acetyl-2,3-dehydro-2-deoxyneuraminic acid (DANA) are 13 ± 3 and 5.0 ± 0.9 μM, respectively, and 28 ± 3 and 11 ± 1 μM, respectively, for Siastatin B. These values agree with literature reports and reflect the weaker inhibition anticipated for Siastatin B in comparison to DANA.
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Affiliation(s)
- Laura D Casto-Boggess
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26505, United States
| | - Lisa A Holland
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26505, United States
| | - Paul A Lawer-Yolar
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26505, United States
| | - John A Lucas
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26505, United States
| | - Jessica R Guerrette
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia26505, United States
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11
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N-Benzoyl leucomethylene blue as a novel substrate for the assays of horseradish peroxidase by spectrophotometry and capillary electrophoresis–laser-induced fluorometry. ANAL SCI 2022; 38:651-655. [DOI: 10.1007/s44211-022-00078-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/06/2022] [Indexed: 11/25/2022]
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