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Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout

In this report, portable, quantitative, and sequential monitoring of copper ions and pyrophosphate (PPi) with a single sensor based on a DNAzyme-Fe(3)O(4) system and glucometer readout was performed. Initially, streptavidin was functionalized on the surface of magnetic Fe(3)O(4) spheres through glut...

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Detalles Bibliográficos
Autores principales: Gu, Chunchuan, Chen, Xiang, Liu, Hongying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8486162/
https://www.ncbi.nlm.nih.gov/pubmed/34599395
http://dx.doi.org/10.1007/s00216-021-03662-4
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author Gu, Chunchuan
Chen, Xiang
Liu, Hongying
author_facet Gu, Chunchuan
Chen, Xiang
Liu, Hongying
author_sort Gu, Chunchuan
collection PubMed
description In this report, portable, quantitative, and sequential monitoring of copper ions and pyrophosphate (PPi) with a single sensor based on a DNAzyme-Fe(3)O(4) system and glucometer readout was performed. Initially, streptavidin was functionalized on the surface of magnetic Fe(3)O(4) spheres through glutaraldehyde. Then, an invertase-modified DNA Cu substrate was connected to the magnetic Fe(3)O(4) spheres by a specific reaction between streptavidin and biotin. The sensing system was formed by a hybridization reaction between the Cu substrate and Cu enzyme. In the presence of Cu(2+), Cu(2+) will recognize the Cu DNA substrate and form an “off-on” signal switch, thereby resulting in the separation of invertase from the Fe(3)O(4) nanospheres. PPi recognizes Cu(2+) to form a Cu(2+)-PPi complex, resulting in an “on-off” signal switch. Under optimized conditions, linear detection ranges for Cu(2+) and PPi of 0.01–5 and 0.5–10 μM, and detection limits for Cu(2+) and PPi of 10 nM and 500 nM, respectively, were obtained. Good selectivity was achieved for the analysis of Cu(2+) and PPi. Satisfactory results were achieved for this biosensor during the determination of Cu(2+) in real tap samples and PPi in human urine samples. This verified that the sensor is portable and low cost, and can be applied to the sequential monitoring of multiple analytes with a single point-of-care biosensor. GRAPHICAL ABSTRACT: [Image: see text]
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spelling pubmed-84861622021-10-04 Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout Gu, Chunchuan Chen, Xiang Liu, Hongying Anal Bioanal Chem Paper in Forefront In this report, portable, quantitative, and sequential monitoring of copper ions and pyrophosphate (PPi) with a single sensor based on a DNAzyme-Fe(3)O(4) system and glucometer readout was performed. Initially, streptavidin was functionalized on the surface of magnetic Fe(3)O(4) spheres through glutaraldehyde. Then, an invertase-modified DNA Cu substrate was connected to the magnetic Fe(3)O(4) spheres by a specific reaction between streptavidin and biotin. The sensing system was formed by a hybridization reaction between the Cu substrate and Cu enzyme. In the presence of Cu(2+), Cu(2+) will recognize the Cu DNA substrate and form an “off-on” signal switch, thereby resulting in the separation of invertase from the Fe(3)O(4) nanospheres. PPi recognizes Cu(2+) to form a Cu(2+)-PPi complex, resulting in an “on-off” signal switch. Under optimized conditions, linear detection ranges for Cu(2+) and PPi of 0.01–5 and 0.5–10 μM, and detection limits for Cu(2+) and PPi of 10 nM and 500 nM, respectively, were obtained. Good selectivity was achieved for the analysis of Cu(2+) and PPi. Satisfactory results were achieved for this biosensor during the determination of Cu(2+) in real tap samples and PPi in human urine samples. This verified that the sensor is portable and low cost, and can be applied to the sequential monitoring of multiple analytes with a single point-of-care biosensor. GRAPHICAL ABSTRACT: [Image: see text] Springer Berlin Heidelberg 2021-10-01 2021 /pmc/articles/PMC8486162/ /pubmed/34599395 http://dx.doi.org/10.1007/s00216-021-03662-4 Text en © Springer-Verlag GmbH Germany, part of Springer Nature 2021 This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.
spellingShingle Paper in Forefront
Gu, Chunchuan
Chen, Xiang
Liu, Hongying
Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout
title Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout
title_full Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout
title_fullStr Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout
title_full_unstemmed Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout
title_short Portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a DNAzyme-Fe(3)O(4) nanosystem and glucometer readout
title_sort portable, quantitative, and sequential monitoring of copper ions and pyrophosphate based on a dnazyme-fe(3)o(4) nanosystem and glucometer readout
topic Paper in Forefront
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8486162/
https://www.ncbi.nlm.nih.gov/pubmed/34599395
http://dx.doi.org/10.1007/s00216-021-03662-4
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