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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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Mine M, Mizuguchi H, Takayanagi T. Kinetic analyses of two-steps oxidation from l-tyrosine to l-dopaquinone with tyrosinase by capillary electrophoresis/dynamic frontal analysis. Anal Biochem 2022; 655:114856. [PMID: 35964734 DOI: 10.1016/j.ab.2022.114856] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 08/05/2022] [Accepted: 08/08/2022] [Indexed: 11/01/2022]
Abstract
Tyrosinase catalyzes the oxidation of l-tyrosine in two stages to produce l-dopa and l-dopaquinone stepwise, and l-dopaquinone is subsequently converted to dopachrome. Most of the conventional analyses subjected only one-step reaction from l-tyrosine to l-dopa or from l-dopa to l-dopaquinone. In this study, kinetic analyses of two-steps oxidation of l-tyrosine with tyrosinase were made by capillary electrophoresis/dynamic frontal analysis (CE/DFA). When l-dopa was introduced into a capillary as a sample plug in a CE/DFA format, the enzymatic oxidation continuously occurred during the electrophoresis, and the product l-dopaquinone was subsequently converted to dopachrome which was detected as a plateau signal. A Michaelis-Menten constant of the second-step kinetic reaction, Km,Do, was determined as 0.45 ± 0.03 mmol L-1. In the analysis of the first-step kinetic reaction from l-tyrosine to l-dopa, l-dopa was not resolved by CE/DFA because both l-tyrosine and l-dopa are electrically neutral. The l-dopa formed and co-migrated at the l-tyrosine zone was calibrated beforehand with the final product of dopachrome detected as a plateau signal. Constantly formed l-dopa was successfully detected as a plateau signal of dopachrome, and a Michaelis-Menten constant of Km,Ty was also determined as 0.061 ± 0.009 mmol L-1 by the CE/DFA. CE/DFA is applicable to two-steps enzymatic reactions.
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Affiliation(s)
- Masanori Mine
- Graduate School of Advanced Technology and Science, Tokushima University, 2-1 Minamijyousanjima-cho, Tokushima, 770-8506, Japan
| | - Hitoshi Mizuguchi
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijyousanjima-cho, Tokushima, 770-8506, Japan
| | - Toshio Takayanagi
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijyousanjima-cho, Tokushima, 770-8506, Japan.
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Zolghadri S, Bahrami A, Hassan Khan MT, Munoz-Munoz J, Garcia-Molina F, Garcia-Canovas F, Saboury AA. A comprehensive review on tyrosinase inhibitors. J Enzyme Inhib Med Chem 2019; 34:279-309. [PMID: 30734608 PMCID: PMC6327992 DOI: 10.1080/14756366.2018.1545767] [Citation(s) in RCA: 511] [Impact Index Per Article: 102.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/04/2018] [Accepted: 11/05/2018] [Indexed: 12/17/2022] Open
Abstract
Tyrosinase is a multi-copper enzyme which is widely distributed in different organisms and plays an important role in the melanogenesis and enzymatic browning. Therefore, its inhibitors can be attractive in cosmetics and medicinal industries as depigmentation agents and also in food and agriculture industries as antibrowning compounds. For this purpose, many natural, semi-synthetic and synthetic inhibitors have been developed by different screening methods to date. This review has focused on the tyrosinase inhibitors discovered from all sources and biochemically characterised in the last four decades.
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Affiliation(s)
- Samaneh Zolghadri
- Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
| | - Asieh Bahrami
- Department of Biology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
| | | | - J. Munoz-Munoz
- Group of Microbiology, Department of Applied Sciences, Northumbria University at Newcastle, Newcastle Upon Tyne, UK
| | - F. Garcia-Molina
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - F. Garcia-Canovas
- GENZ-Group of Research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Espinardo, Murcia, Spain
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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Barros MR, Menezes TM, da Silva LP, Pires DS, Princival JL, Seabra G, Neves JL. Furan inhibitory activity against tyrosinase and impact on B16F10 cell toxicity. Int J Biol Macromol 2019; 136:1034-1041. [DOI: 10.1016/j.ijbiomac.2019.06.120] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/03/2019] [Accepted: 06/17/2019] [Indexed: 12/12/2022]
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Wang W, Yang J. Advances in screening enzyme inhibitors by capillary electrophoresis. Electrophoresis 2019; 40:2075-2083. [DOI: 10.1002/elps.201900013] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 05/06/2019] [Accepted: 05/19/2019] [Indexed: 12/20/2022]
Affiliation(s)
- 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 Lanzhou P. R. 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 Lanzhou P. R. China
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Gattu S, Crihfield CL, Lu G, Bwanali L, Veltri LM, Holland LA. Advances in enzyme substrate analysis with capillary electrophoresis. Methods 2018; 146:93-106. [PMID: 29499329 PMCID: PMC6098732 DOI: 10.1016/j.ymeth.2018.02.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 02/01/2018] [Accepted: 02/05/2018] [Indexed: 02/06/2023] Open
Abstract
Capillary electrophoresis provides a rapid, cost-effective platform for enzyme and substrate characterization. The high resolution achievable by capillary electrophoresis enables the analysis of substrates and products that are indistinguishable by spectroscopic techniques alone, while the small volume requirement enables analysis of enzymes or substrates in limited supply. Furthermore, the compatibility of capillary electrophoresis with various detectors makes it suitable for KM determinations ranging from nanomolar to millimolar concentrations. Capillary electrophoresis fundamentals are discussed with an emphasis on the separation mechanisms relevant to evaluate sets of substrate and product that are charged, neutral, and even chiral. The basic principles of Michaelis-Menten determinations are reviewed and the process of translating capillary electrophoresis electropherograms into a Michaelis-Menten curve is outlined. The conditions that must be optimized in order to couple off-line and on-line enzyme reactions with capillary electrophoresis separations, such as incubation time, buffer pH and ionic strength, and temperature, are examined to provide insight into how the techniques can be best utilized. The application of capillary electrophoresis to quantify enzyme inhibition, in the form of KI or IC50 is detailed. The concept and implementation of the immobilized enzyme reactor is described as a means to increase enzyme stability and reusability, as well as a powerful tool for screening enzyme substrates and inhibitors. Emerging techniques focused on applying capillary electrophoresis as a rapid assay to obtain structural identification or sequence information about a substrate and in-line digestions of peptides and proteins coupled to mass spectrometry analyses are highlighted.
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Affiliation(s)
- Srikanth Gattu
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506, United States
| | - Cassandra L Crihfield
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506, United States
| | - Grace Lu
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506, United States
| | - Lloyd Bwanali
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506, United States
| | - Lindsay M Veltri
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506, United States
| | - Lisa A Holland
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV 26506, United States.
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7
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Voeten RLC, Ventouri IK, Haselberg R, Somsen GW. Capillary Electrophoresis: Trends and Recent Advances. Anal Chem 2018; 90:1464-1481. [PMID: 29298038 PMCID: PMC5994730 DOI: 10.1021/acs.analchem.8b00015] [Citation(s) in RCA: 188] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Robert L C Voeten
- Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Vrije Universiteit Amsterdam , de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.,TI-COAST , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Iro K Ventouri
- TI-COAST , Science Park 904, 1098 XH Amsterdam, The Netherlands.,Analytical Chemistry Group, van't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Rob Haselberg
- Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Vrije Universiteit Amsterdam , de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Govert W Somsen
- Division of BioAnalytical Chemistry, Department of Chemistry and Pharmaceutical Sciences, Vrije Universiteit Amsterdam , de Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
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Isolation and Purification of Condensed Tannin from the Leaves and Branches of Prunus cerasifera and Its Structure and Bioactivities. Appl Biochem Biotechnol 2017; 185:464-475. [PMID: 29181763 DOI: 10.1007/s12010-017-2635-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 10/16/2017] [Indexed: 10/18/2022]
Abstract
Prunus cerasifera has a rich resource and a weak utilization rate and its biological functions have been investigated. We found that the contents of total phenol (TP) in leaves and branches of Prunus cerasifera were 117.8 ± 8.8 and 100.04 ± 0.9 mg/g, respectively; the contents of soluble condensed tannin (SCT) were 73.95 ± 0.9 and 78.65 ± 4.1 mg/g, respectively; the structure of SCT containing afzelechin/epiafzelechin, catechin/epicatechin, and atechin/epicatechin as the main units and the SCT from leaves and branches exhibited better anti-tyrosinase and antioxidant activities. This study could clarify Prunus cerasifera condensed tannin resource availability and lay a theoretical foundation for its development as a natural antioxidant and tyrosinase inhibitor.
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Huang S, Paul P, Ramana P, Adams E, Augustijns P, Van Schepdael A. Advances in Capillary Electrophoretically Mediated Microanalysis for On-line Enzymatic and Derivatization Reactions. Electrophoresis 2017; 39:97-110. [DOI: 10.1002/elps.201700262] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Shengyun Huang
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Prasanta Paul
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Pranov Ramana
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Erwin Adams
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
| | - Patrick Augustijns
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Drug delivery and disposition; Leuven Belgium
| | - Ann Van Schepdael
- KU Leuven - University of Leuven; Department of Pharmaceutical and Pharmacological Sciences, Pharmaceutical Analysis; Leuven Belgium
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