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Gutiérrez-Gálvez L, El Hajioui-El Ghalbzouri H, Enebral-Romero E, Garrido M, Naranjo A, López-Diego D, Luna M, Pérez EM, García-Mendiola T, Lorenzo E. Rapid and simple viral protein detection by functionalized 2D MoS 2/graphene electrochemiluminescence aptasensor. Talanta 2024; 276:126293. [PMID: 38788383 DOI: 10.1016/j.talanta.2024.126293] [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: 02/21/2024] [Revised: 05/07/2024] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Abstract
In this work we present the development of an electrochemiluminescence aptasensor based on electrografting molybdenum disulphide nanosheets functionalized with diazonium salt (MoS2-N2+) upon screen-printed electrodes of graphene (SPEs GPH) for viral proteins detection. In brief, this aptasensor consists of SPEs GPH electrografted with MoS2-N2+ and modified with a thiolated aptamer, which can specifically recognize the target protein analyte. In this case, we have used SARS-CoV-2 spike protein as model protein. Electrochemiluminescence detection was performed by using the [Ru(bpy)3]2+/TPRA (tripropylamine) system, which allows the specific detection of the SARS-CoV-2 spike protein easily and rapidly with a detection limit of 9.74 fg/mL and a linear range from 32.5 fg/mL to 50.0 pg/mL. Moreover, the applicability of the aptasensor has been confirmed by the detection of the protein directly in human saliva samples. Comparing our device with a traditional saliva antigen test, our aptasensor can detect the spike protein even when the saliva antigen test gives a negative result.
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Affiliation(s)
- Laura Gutiérrez-Gálvez
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | | | - Estefanía Enebral-Romero
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, 28049, Madrid, Spain; IMDEA-Nanociencia, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain
| | - Marina Garrido
- IMDEA-Nanociencia, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain
| | - Alicia Naranjo
- IMDEA-Nanociencia, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain
| | - David López-Diego
- Instituto de Micro y Nanotecnología IMN-CNM, CSIC (CEI UAM+CSIC), Isaac Newton 8, Tres Cantos, 28760, Madrid, Spain
| | - Mónica Luna
- Instituto de Micro y Nanotecnología IMN-CNM, CSIC (CEI UAM+CSIC), Isaac Newton 8, Tres Cantos, 28760, Madrid, Spain
| | - Emilio M Pérez
- IMDEA-Nanociencia, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain
| | - Tania García-Mendiola
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, 28049, Madrid, Spain; Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
| | - Encarnación Lorenzo
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, 28049, Madrid, Spain; IMDEA-Nanociencia, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain; Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
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Arias-Aranda LR, Salinas G, Kuhn A, Xu G, Kanoufi F, Bouffier L, Sojic N. Complex electrochemiluminescence patterns shaped by hydrodynamics at a rotating bipolar electrode. Chem Sci 2024; 15:8723-8730. [PMID: 38873074 PMCID: PMC11168095 DOI: 10.1039/d4sc02528h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 05/16/2024] [Indexed: 06/15/2024] Open
Abstract
Electrochemiluminescence (ECL) is a powerful analytical approach that enables the optical readout of electrochemical processes. Over the last few years, ECL has gained considerable attention due to its large number of applications, including chemical sensing, bioanalysis and microscopy. In these fields, the promotion of ECL at bipolar electrodes has offered unprecedented opportunities thanks to wireless electrochemical addressing. Herein, we take advantage of the synergy between ECL and bipolar electrochemistry (BE) for imaging light-emitting layers shaped by hydrodynamics, polarization effects and the nature of the electrochemical reactions taking place wirelessly on a rotating bipolar electrode. The proof-of-principle is established with the model ECL system [Ru(bpy)3]2+/tri-n-propylamine. Interestingly, the ECL-emitting region moves and expands progressively from the anodic bipolar pole to the cathodic one where ECL reactants should neither be generated nor ECL be observed. Therefore, it shows a completely unusual behavior in the ECL field since the region where ECL reagents are oxidized does not coincide with the zone where ECL light is emitted. In addition, the ECL patterns change progressively to an "ECL croissant" and then to a complete ring shape due to the hydrodynamic convection. Such an approach allows the visualization of complex light-emitting patterns, whose shape is directly controlled by the rotation speed, chemical reactivity and BE-induced polarization. Indeed, the bipolar electrochemical addressing of the electrode breaks the circular symmetry of the reported rotating system. This unexplored and a priori simple configuration yields unique ECL behavior and raises new curious questions from the theoretical and experimental points of view in analytical chemistry. Finally, this novel wireless approach will be useful for the development of original ECL systems for analytical chemistry, studies of electrochemical reactivity, coupling microfluidics with ECL and imaging.
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Affiliation(s)
| | - Gerardo Salinas
- Univ. Bordeaux, CNRS UMR 5255, Bordeaux INP, Site ENSMAC 33607 Pessac France
| | - Alexander Kuhn
- Univ. Bordeaux, CNRS UMR 5255, Bordeaux INP, Site ENSMAC 33607 Pessac France
| | - Guobao Xu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China No. 96 Jinzhai Road Hefei Anhui 230026 P. R. China
| | | | - Laurent Bouffier
- Univ. Bordeaux, CNRS UMR 5255, Bordeaux INP, Site ENSMAC 33607 Pessac France
| | - Neso Sojic
- Univ. Bordeaux, CNRS UMR 5255, Bordeaux INP, Site ENSMAC 33607 Pessac France
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Fiorani A, Santo CI, Sakanoue K, Calabria D, Mirasoli M, Paolucci F, Valenti G, Einaga Y. Electrogenerated chemiluminescence from luminol-labelled microbeads triggered by in situ generation of hydrogen peroxide. Anal Bioanal Chem 2024:10.1007/s00216-024-05356-z. [PMID: 38834789 DOI: 10.1007/s00216-024-05356-z] [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: 04/04/2024] [Revised: 05/11/2024] [Accepted: 05/21/2024] [Indexed: 06/06/2024]
Abstract
We developed a sensing strategy that mimics the bead-based electrogenerated chemiluminescence immunoassay. However, instead of the most common metal complexes, such as Ru or Ir, the luminophore is luminol. The electrogenerated chemiluminescence of luminol was promoted by in situ electrochemical generation of hydrogen peroxide at a boron-doped diamond electrode. The electrochemical production of hydrogen peroxide was achieved in a carbonate solution by an oxidation reaction, while at the same time, microbeads labelled with luminol were deposited on the electrode surface. For the first time, we proved that was possible to obtain light emission from luminol without its direct oxidation at the electrode. This new emission mechanism is obtained at higher potentials than the usual luminol electrogenerated chemiluminescence at 0.3-0.5 V, in conjunction with hydrogen peroxide production on boron-doped diamond at around 2-2.5 V (vs Ag/AgCl).
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Affiliation(s)
- Andrea Fiorani
- Department of Chemistry, Keio University, Yokohama, 223-8522, Japan.
| | - Claudio Ignazio Santo
- Department of Chemistry "G. Ciamician", University of Bologna, 40126, Bologna, Italy
| | - Kohei Sakanoue
- Department of Chemistry, Keio University, Yokohama, 223-8522, Japan
| | - Donato Calabria
- Department of Chemistry "G. Ciamician", University of Bologna, 40126, Bologna, Italy
| | - Mara Mirasoli
- Department of Chemistry "G. Ciamician", University of Bologna, 40126, Bologna, Italy
| | - Francesco Paolucci
- Department of Chemistry "G. Ciamician", University of Bologna, 40126, Bologna, Italy
| | - Giovanni Valenti
- Department of Chemistry "G. Ciamician", University of Bologna, 40126, Bologna, Italy
| | - Yasuaki Einaga
- Department of Chemistry, Keio University, Yokohama, 223-8522, Japan.
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Fracassa A, Santo CI, Kerr E, Knežević S, Hayne DJ, Francis PS, Kanoufi F, Sojic N, Paolucci F, Valenti G. Redox-mediated electrochemiluminescence enhancement for bead-based immunoassay. Chem Sci 2024; 15:1150-1158. [PMID: 38239687 PMCID: PMC10793598 DOI: 10.1039/d3sc06357g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 12/08/2023] [Indexed: 01/22/2024] Open
Abstract
Electrochemiluminescence (ECL) is a highly sensitive mode of detection utilised in commercialised bead-based immunoassays. Recently, the introduction of a freely diffusing water-soluble Ir(iii) complex was demonstrated to enhance the ECL emission of [Ru(bpy)3]2+ labels anchored to microbeads, but a comprehensive investigation of the proposed 'redox-mediated' mechanism was not carried out. In this work, we select three different water-soluble Ir(iii) complexes by virtue of their photophysical and electrochemical properties in comparison with those of the [Ru(bpy)3]2+ luminophore and the TPrA co-reactant. A systematic investigation of the influence of each Ir(iii) complex on the emission of the Ru(ii) labels on single beads by ECL microscopy revealed that the heterogeneous ECL can be finely tuned and either enhanced up to 107% or lowered by 75%. The variation of the [Ru(bpy)3]2+ ECL emission was correlated to the properties of each Ir(iii)-based mediator, which enabled us to decipher the mechanism of interaction and define guidelines for the future design of novel Ir(iii) complexes to further enhance the ECL emission of bead-based immunoassays. Ultimately, we showcase the potential of this technology for practical sample analysis in commercial instruments by assessing the enhancement of the collective ECL intensity from a bead-based system.
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Affiliation(s)
- Alessandro Fracassa
- Department of Chemistry Giacomo Ciamician, University of Bologna via Selmi 2 Bologna 40126 Italy
| | - Claudio Ignazio Santo
- Department of Chemistry Giacomo Ciamician, University of Bologna via Selmi 2 Bologna 40126 Italy
| | - Emily Kerr
- Institute for Frontier Materials, Deakin University Geelong Victoria 3220 Australia
| | - Sara Knežević
- Univ. Bordeaux, CNRS, Bordeaux INP, Institut des Sciences Moléculaires UMR 5255 33607 Pessac France
| | - David J Hayne
- Institute for Frontier Materials, Deakin University Geelong Victoria 3220 Australia
| | - Paul S Francis
- Deakin University, Centre for Sustainable Bioproducts, Faculty of Science, Engineering and Built Environment Geelong Victoria 3220 Australia
| | | | - Neso Sojic
- Univ. Bordeaux, CNRS, Bordeaux INP, Institut des Sciences Moléculaires UMR 5255 33607 Pessac France
| | - Francesco Paolucci
- Department of Chemistry Giacomo Ciamician, University of Bologna via Selmi 2 Bologna 40126 Italy
- ICMATE-CNR Corso Stati Uniti 4 35127 Padova Italy
| | - Giovanni Valenti
- Department of Chemistry Giacomo Ciamician, University of Bologna via Selmi 2 Bologna 40126 Italy
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