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Khristunova E, Barek J, Kratochvil B, Korotkova E, Dorozhko E, Vyskocil V. Electrochemical immunoassay for the detection of antibodies to tick-borne encephalitis virus by using various types of bioconjugates based on silver nanoparticles. Bioelectrochemistry 2020; 135:107576. [PMID: 32502929 DOI: 10.1016/j.bioelechem.2020.107576] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 05/19/2020] [Accepted: 05/21/2020] [Indexed: 10/24/2022]
Abstract
This work reports for the first time a significantly improved and simplified electrochemical immunoassay to detect antibodies to tick-borne encephalitis virus (TBEV) using a 96-well microtiter plate as a platform for immobilization and silver nanoparticles (AgNPs) as electrochemical labels. The electrochemical assay is performed by detecting the elemental silver oxidation signal where the electroactive signalling silver species are released from the bioconjugates (Ab@AgNP, AbS@AgNP, and ProteinA@AgNP). For this purpose, AgNPs were synthesized and further tagged with biomolecules (antibodies to TBEV, cleaved antibodies to TBEV, and protein A). Signal is read by linear sweep anodic stripping voltammetry (LSASV) of silver ions (through the electrochemical stripping of accumulated elemental silver) on a graphite electrode (GE). AbS@AgNP was chosen as the best option for the new electrochemical immunoassay. The results of electrochemical measurements demonstrated that voltammetric signal increased with the increasing concentration of target antibodies to TBEV within the range from 100 to 1600 IU mL-1, with a detection limit of 90 IU mL-1. To verify the practical application of the novel electrochemical immunosensor, the quantity of immunoglobulins against TBEV in human serum was checked. The results may contribute to the development of alternative methods for monitoring TBEV in biological fluids.
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Affiliation(s)
- Ekaterina Khristunova
- National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Albertov 6, 12843 Prague 2, Czech Republic; Department of Solid State Chemistry, University of Chemistry and Technology, Prague, Technicka 5, 16628 Prague 6, Czech Republic
| | - Jiri Barek
- National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Albertov 6, 12843 Prague 2, Czech Republic.
| | - Bohumil Kratochvil
- National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; Department of Solid State Chemistry, University of Chemistry and Technology, Prague, Technicka 5, 16628 Prague 6, Czech Republic
| | - Elena Korotkova
- National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia
| | - Elena Dorozhko
- National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia
| | - Vlastimil Vyskocil
- Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Albertov 6, 12843 Prague 2, Czech Republic
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Tursynbolat S, Bakytkarim Y, Huang J, Wang L. Ultrasensitive electrochemical determination of metronidazole based on polydopamine/carboxylic multi-walled carbon nanotubes nanocomposites modified GCE. J Pharm Anal 2017; 8:124-130. [PMID: 29736299 PMCID: PMC5934733 DOI: 10.1016/j.jpha.2017.11.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 11/05/2017] [Accepted: 11/16/2017] [Indexed: 11/17/2022] Open
Abstract
An ultrasensitive electrochemical sensor based on polydopamine/carboxylic multi-walled carbon nanotubes (MWCNTs−COOH) nanocomposites modified glassy carbon electrode (GCE) was presented in this work, which has been developed for highly selective and highly sensitive determination of an antimicrobial drug, metronidazole. The preparation of polydopamine/MWCNTs–COOH nanocomposites/GCE sensor is simple and possesses high reproducible, where polydopamine can be coated on the surface of MWCNTs–COOH via a simple electropolymerization process. Under optimized conditions, the proposed sensor showed ultrasensitive determination for metronidazole with a wide linear detection range from 5 to 5000 µmol/dm3 and a low detection limit of 0.25 µmol/dm3 (S/N = 3). Moreover, the proposed sensor has been successfully applied for the quantitative determination of metronidazole in real drug samples. This work may provide a novel and effective analytical platform for determination of metronidazole in application of real pharmaceutical and biological samples analysis.
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Affiliation(s)
- Satar Tursynbolat
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Yrysgul Bakytkarim
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Jianzhi Huang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Lishi Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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Hájková A, Barek J, Vyskočil V. Voltammetric Determination of 2-Aminofluoren-9-one and Investigation of Its Interaction with DNA on a Glassy Carbon Electrode. ELECTROANAL 2014. [DOI: 10.1002/elan.201400427] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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