1
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da Fonseca Alves R, Pallarès-Rusiñol A, Rossi R, Martí M, Vaz ER, de Araújo TG, Sotomayor MDPT, Pividori MI. Peptide-based biosensing approaches for targeting breast cancer-derived exosomes. Biosens Bioelectron 2024; 255:116211. [PMID: 38537428 DOI: 10.1016/j.bios.2024.116211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/04/2024] [Accepted: 03/11/2024] [Indexed: 04/15/2024]
Abstract
Exosomes are nanovesicles present in all the biological fluids, making them attractive as non-invasive biomarkers for diseases like cancer, among many others. However, exosomes are complex to separate and detect, requiring comprehensive molecular characterization for their routine use in diagnostics. This study explores the use of peptides as cost-effective and stable alternatives to antibodies for exosome binding. To achieve that, phage display technology was employed to select peptides with high specificity for target molecules in exosomes. Specifically, a selected peptide was evaluated for its ability to selectively bind breast cancer-derived exosomes. Proteomic analysis identified 38 protein candidates targeted by the peptide on exosome membranes. The binding of the peptide to breast cancer-derived exosomes was successfully demonstrated by flow cytometry and magneto-actuated immunoassays. Furthermore, an electrochemical biosensor was also tested for breast cancer-derived exosome detection and quantification. The peptide demonstrated effective binding to exosomes from aggressive cancer cell lines, offering promising results in terms of specificity and recovery. This research shows potential for developing rapid, accessible diagnostic tools for breast cancer, especially in low-resource healthcare settings.
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Affiliation(s)
- Rafael da Fonseca Alves
- Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Spain; Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain; Institute of Chemistry, State University of São Paulo (UNESP), Brazil
| | - Arnau Pallarès-Rusiñol
- Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Spain; Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Rosanna Rossi
- Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Spain; Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Merce Martí
- Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Spain
| | - Emilia Rezende Vaz
- Institute of Biotechnology (IBTEC), Federal University of Uberlandia (UFU), Uberlandia, MG, Brazil
| | | | | | - Maria Isabel Pividori
- Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Spain; Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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2
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Mesas Gómez M, Julián E, Armengou L, Pividori MI. Evaluating smartphone-based optical readouts for immunoassays in human and veterinary healthcare: A comparative study. Talanta 2024; 275:126106. [PMID: 38648687 DOI: 10.1016/j.talanta.2024.126106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 04/08/2024] [Accepted: 04/12/2024] [Indexed: 04/25/2024]
Abstract
Recent advances have significantly enhanced the use of smartphone devices for medical diagnostics. This study uses high-resolution cameras in mobile devices to capture and process bioassay images, enabling the quantification of diverse biomarkers across a range of diagnostic tests conducted on 96-well microplates. The study evaluates the effectiveness of this technology through protein quantification techniques and immunoassays that generate colorimetric responses at specific wavelengths. It includes the assessment of bicinchoninic acid and Bradford protein quantification methods, alongside a conventional immunoassay for detecting mare antibodies in colostrum to monitor foal immunodeficiencies. Further application involves the readout of magneto-actuated immunoassays aimed at quantifying bacteria. The results obtained from benchtop spectrophotometry at 595, 562, and 450 nm are compared with those acquired using a smartphone, which identified color intensities in shades of blue, purple, and yellow. This comparison yields promising correlations for the samples tested, suggesting a high degree of accuracy in the smartphone capability to analyze bioassay outcomes. The analysis via smartphone is facilitated by a specific app, which processes the images captured by the phone camera to quantify color intensities corresponding to different biomarker concentrations. Detection limits of 12.3 and 22.8 μg mL-1 for the bicinchoninic acid assay and 36.7 and 45.4 μg mL-1 for the Bradford are obtained for protein quantification using the spectrophotometer and the smartphone app, respectively. For mare's antibodies in colostrum, the values are 1.14 and 1.72 ng mL-1, while the detection of E. coli is performed at 2.0 x 104 and 2.9 × 104 CFU mL-1, respectively. This approach offers further advantages, including wide availability, cost-effectiveness, portability, compared to traditional and expensive benchtop instruments.
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Affiliation(s)
- Melania Mesas Gómez
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain; Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Esther Julián
- Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Lara Armengou
- Fundació Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Maria Isabel Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain; Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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3
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Mesas Gómez M, Molina-Moya B, de Araujo Souza B, Boldrin Zanoni MV, Julián E, Domínguez J, Pividori MI. Improved biosensing of Legionella by integrating filtration and immunomagnetic separation of the bacteria retained in filters. Mikrochim Acta 2024; 191:82. [PMID: 38191940 PMCID: PMC10774190 DOI: 10.1007/s00604-023-06122-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 11/23/2023] [Indexed: 01/10/2024]
Abstract
A novel approach is presented that combines filtration and the direct immunomagnetic separation of the retained bacteria Legionella in filters, for further electrochemical immunosensing. This strategy allows for the separation and preconcentration of the water-borne pathogen from high-volume samples, up to 1000 mL. The limit of detection of the electrochemical immunosensor resulted in 100 CFU mL-1 and improved up to 0.1 CFU mL-1 when the preconcentration strategy was applied in 1 L of sample (103-fold improvement). Remarkably, the immunosensor achieves the limit of detection in less than 2.5 h and simplified the analytical procedure. This represents the lowest concentration reported to date for electrochemical immunosensing of Legionella cells without the need for pre-enrichment or DNA amplification. Furthermore, the study successfully demonstrates the extraction of bacteria retained on different filtering materials using immunomagnetic separation, highlighting the high efficiency of the magnetic particles to pull out the bacteria directly from solid materials. This promising feature expands the applicability of the method beyond water systems for detecting bacteria retained in air filters of air conditioning units by directly performing the immunomagnetic separation in the filters.
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Affiliation(s)
- Melania Mesas Gómez
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - Bárbara Molina-Moya
- Institut d'Investigació Germans Trias i Pujol (IGTP), 08916, Badalona, Spain
- CIBER Enfermedades Respiratorias, Instituto de Salud Carlos III, Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Bárbara de Araujo Souza
- Department of Analytical Chemistry, Institute of Chemistry, UNESP, Universidad Estadual Paulista, Araraquara, SP, Brazil
| | - Maria Valnice Boldrin Zanoni
- Department of Analytical Chemistry, Institute of Chemistry, UNESP, Universidad Estadual Paulista, Araraquara, SP, Brazil
| | - Esther Julián
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - José Domínguez
- Institut d'Investigació Germans Trias i Pujol (IGTP), 08916, Badalona, Spain
- CIBER Enfermedades Respiratorias, Instituto de Salud Carlos III, Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Departament de Genètica i Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Maria Isabel Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain.
- Biosensing and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
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4
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Abstract
Exosomes are receiving highlighted attention as new biomarkers for the detection of cancer since they are profusely released by tumor cells in different biological fluids. In this paper, the exosomes are preconcentrated from the serum by immunomagnetic separation (IMS) based on a CD326 receptor as a specific epithelial cancer-related biomarker and detected by glyceraldehyde-3-phosphate dehydrogenase (GAPDH) transcripts. Following the lysis of the captured exosomes, the released GAPDH transcripts are amplified by reverse transcription polymerase chain reaction (RT-PCR) with a double-tagging set of primers on poly(dT)-modified-MPs to increase the sensitivity. The double-tagged amplicon is then quantified by electrochemical genosensing. The IMS/double-tagging RT-PCR/electrochemical genosensing approach is first demonstrated for the sensitive detection of exosomes derived from MCF7 breast cancer cells and compared with CTCs in terms of the analytical performance, showing an LOD of 4 × 102 exosomes μL-1. The genosensor was applied to human samples by immunocapturing the exosomes directly from serum from breast cancer patients and showed a higher electrochemical signal (3.3-fold, p < 0.05), when compared with healthy controls, suggesting an overexpression of GAPDH on serum-derived exosomes from breast cancer patients. The detection of GAPDH transcripts is performed from only 1.0 mL of human serum using specific magnetic particles, improving the analytical simplification and avoiding ultracentrifugation steps, demonstrating to be a promising strategy for minimal invasive liquid biopsy.
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Affiliation(s)
- Arnau Pallares-Rusiñol
- Grup
de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain,Biosensing
and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - Silio Lima Moura
- Grup
de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - Mercè Martí
- Biosensing
and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - Maria Isabel Pividori
- Grup
de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain,Biosensing
and Bioanalysis Group, Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain,. Tel.: +34 93 581 2806. Fax: +34 93 581 2379
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5
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Blasques R, Fernandes-Junior W, Vieira Mendes AM, Costa AR, Canevari T, Arenas L, da Rosa M, Nunes G, Janegitz B, Silva MR, Pividori MI, MENDES VILLIS PAULOCESAR. Electrochemical glyphosate sensor based on hybrid material SiO2/Sm2O3/carbon modified with Meldola Blue. ELECTROANAL 2022. [DOI: 10.1002/elan.202200373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Tang X, Zhang Q, Isabel Pividori M, Zhang Z, Marty JL, Catanante G. A Sensitive Aptasensor Using Biotin-Streptavidin System for Patulin Detection in Apple Juice. Biosensors (Basel) 2022; 12:59. [PMID: 35200320 PMCID: PMC8869234 DOI: 10.3390/bios12020059] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/13/2022] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
Patulin contamination in fruits, vegetables, and their products is considered a serious health risk factor for food safety and human health. Thus, a rapid, simple detection method for patulin is becoming important, which could provide a tool for routine screening and food surveys. The objective of this study was to develop a sensitive aptamer-based lateral flow assay (FLA) using Streptavidin functionalized gold nanoparticles for sensitive patulin detection. An excellent dynamic range for patulin detection was obtained (2.7~139.8 ng/mL in the buffer and 7.07~359.5 ng/mL in the sample) with no affinity for other mycotoxins such as zearalenone (ZEN), ochratoxin A (OTA), aflatoxin B1 (AFB1), citrinin or tenuazonic acid (TEA). The limit of detection was 0.19 ng/mL in the buffer and 0.36 ng/mL in the real sample. The recoveries were 83.3% to 107.1%, with a satisfactory RSD value from 6.5% to 7.5%. Hence the established LFA could be used as a rapid, simple, on-site screening tool for PAT determination in apple juice.
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Affiliation(s)
- Xiaoqian Tang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.T.); (Z.Z.)
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Laboratory of Risk Assessment for Oilseeds Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Quality Inspection and Test Center for Oilseeds Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Laboratoire BAE-LBBM USR 3579, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, CEDEX, 66860 Perpignan, France
| | - Qi Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.T.); (Z.Z.)
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Laboratory of Risk Assessment for Oilseeds Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Quality Inspection and Test Center for Oilseeds Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
| | - Maria Isabel Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
| | - Zhaowei Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.T.); (Z.Z.)
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
- Laboratory of Risk Assessment for Oilseeds Products, Ministry of Agriculture and Rural Affairs, Wuhan 430062, China
| | | | - Gaëlle Catanante
- Laboratoire BAE-LBBM USR 3579, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, CEDEX, 66860 Perpignan, France
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7
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Marfà J, Pupin RR, Sotomayor M, Pividori MI. Magnetic-molecularly imprinted polymers in electrochemical sensors and biosensors. Anal Bioanal Chem 2021; 413:6141-6157. [PMID: 34164705 DOI: 10.1007/s00216-021-03461-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 06/02/2021] [Accepted: 06/08/2021] [Indexed: 12/15/2022]
Abstract
Magnetic particles, as well as molecularly imprinted polymers, have revolutionized separation and bioanalytical methodologies in the 1980s due to their wide range of applications. Today, biologically modified magnetic particles are used in many scientific and technological applications and are integrated in more than 50,000 diagnostic instruments for the detection of a huge range of analytes. However, the main drawback of this material is their stability and high cost. In this work, we review recent advances in the synthesis and characterization of hybrid molecularly imprinted polymers with magnetic properties, as a cheaper and robust alternative for the well-known biologically modified magnetic particles. The main advantages of these materials are, besides the magnetic properties, the possibility to be stored at room temperature without any loss in the activity. Among all the applications, this work reviews the direct detection of electroactive analytes based on the preconcentration by using magnetic-MIP integrated on magneto-actuated electrodes, including food safety, environmental monitoring, and clinical and pharmaceutical analysis. The main features of these electrochemical sensors, including their analytical performance, are summarized. This simple and rapid method will open the way to incorporate this material in different magneto-actuated devices with no need for extensive sample pretreatment and sophisticated instruments.
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Affiliation(s)
- J Marfà
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - R R Pupin
- Department of Analytical Chemistry, Institute of Chemistry, State University of São Paulo (UNESP), Araraquara, SP, 14801-970, Brazil
| | - Mpt Sotomayor
- Department of Analytical Chemistry, Institute of Chemistry, State University of São Paulo (UNESP), Araraquara, SP, 14801-970, Brazil
| | - M I Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain. .,Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain.
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8
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Ben Aissa A, Madaboosi N, Nilsson M, Pividori MI. Electrochemical Genosensing of E. coli Based on Padlock Probes and Rolling Circle Amplification. Sensors (Basel) 2021; 21:1749. [PMID: 33802488 PMCID: PMC7959471 DOI: 10.3390/s21051749] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 11/16/2022]
Abstract
Isothermal amplification techniques are emerging nowadays for the rapid and accurate detection of pathogenic bacteria in low resource settings, where many infectious diseases are endemic, and the lack of reliable power supply, trained personnel and specialized facilities pose critical barriers for timely diagnosis. This work addresses the detection of E. coli based on DNA isothermal amplification performed on magnetic particles (MPs) followed by electrochemical genosensing on disposable electrodes by square-wave voltammetry. In this approach, the bacterial DNA is preconcentrated using a target-specific magnetic probe and then amplified on the MPs by rolling circle amplification (RCA). Two different electrochemical readout methods for the RCA amplicons are tested. The first one relied on the labelling of the magnetic RCA product with a digoxigenin probe followed by the incubation with antiDIG-HRP antibody as electrochemical reporter. In the second case, the direct detection with an HRP-probe was performed. This latter strategy showed an improved analytical performance, while simultaneously avoiding the use of thermocyclers or bulky bench top equipment.
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Affiliation(s)
- Alejandra Ben Aissa
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
| | - Narayanan Madaboosi
- IIT Madras Bioincubator, Indian Institute of Technology, Chennai 600113, India; or
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, 11419 Stockholm, Sweden;
| | - Mats Nilsson
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, 11419 Stockholm, Sweden;
| | - Maria Isabel Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Institute of Biotechnology and Biomedicine, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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9
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Corrêa GT, Souza JCD, Silva JP, Pividori MI, Zanoni MVB. Determination of temporary dye Basic Red 51 in commercial hair dye, river water and wastewater from hairdressing salon using graphite-epoxy composite electrode modified with magnetic nanoparticles. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105485] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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10
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Hassan AHA, Sappia L, Moura SL, Ali FHM, Moselhy WA, Sotomayor MDPT, Pividori MI. Biomimetic magnetic sensor for electrochemical determination of scombrotoxin in fish. Talanta 2018; 194:997-1004. [PMID: 30609635 DOI: 10.1016/j.talanta.2018.10.066] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 10/15/2018] [Accepted: 10/18/2018] [Indexed: 11/18/2022]
Abstract
This work addresses a novel, rapid and cost-effective approach for the electrochemical sensing of scombrotoxin (histamine) in fish based on magnetic molecularly imprinted polymer (magnetic-MIP). The histamine magnetic-MIP was synthesized by the core-shell method using histamine as a template, and 2-vinyl pyridine as functional monomer. The magnetic-MIP was characterized by TEM, SEM, and confocal microscopy. Additionally, the binding capacity of magnetic-MIP towards histamine was investigated and compared with magnetic non-molecularly imprinted polymer (magnetic-NIP). This biomimetic material merged the advantages of MIPs and magnetic particles (MPs), including low cost of production, stability, high binding capacity and can be easily separated by the aid of a permanent magnet. The magnetic-MIP was integrated into magneto-actuated electrodes for the direct electrochemical detection of histamine preconcentrated from fish samples. The results revealed that this approach succeeded in the preconcentration and determination of histamine with a LOD as low as 1.6 × 10-6 mg L-1, much lower than the index for fish spoilage (50 mg kg-1) accordingly to the legislation. Furthermore, the analytical performance was validated for the determination of histamine in scombroid fish samples with recovery values ranging from 96.8 to 102.0 %, confirm so it can be applied easily for routine food examination.
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Affiliation(s)
- Amal H A Hassan
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain; Food Hygiene and Control department, Faculty of Veterinary Medicine, Beni-Suef University, 62511 Beni-Suef, Egypt
| | - Luciano Sappia
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - Silio Lima Moura
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain
| | - Fatma H M Ali
- Food Hygiene and Control department, Faculty of Veterinary Medicine, Beni-Suef University, 62511 Beni-Suef, Egypt
| | - Walaa A Moselhy
- Forensic Medicine and Toxicology department, Faculty of Veterinary Medicine, Beni-Suef University, 62511 Beni-Suef, Egypt
| | | | - Maria Isabel Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain.
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11
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Ruiz-Córdova GA, Khan S, Gonçalves LM, Pividori MI, Picasso G, Sotomayor MDPT. Electrochemical sensing using magnetic molecularly imprinted polymer particles previously captured by a magneto-sensor. Talanta 2017; 181:19-23. [PMID: 29426499 DOI: 10.1016/j.talanta.2017.12.085] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/22/2017] [Accepted: 12/27/2017] [Indexed: 01/29/2023]
Abstract
The determination of 1-chloro-2,4-dinitrobenzene (CDNB) was used as a proof-of-concept to a simple analytical practical configuration applying magnetic molecularly imprinted particles (mag-MIPs). Mag-MIPs were captured from an emulsion by a home-made magneto-sensor (where a small magnet was entrapped by a graphite-epoxy composite) and then, this sensor, was transferred to the solution containing the analyte, where, after binding to the mag-MIPs, the analyte was directly analysed using differential pulse voltammetry (DPV) since the magneto-sensor acted as the working electrode. After optimization, a detection limit of 6.0 μmol L-1 with a RSD of 2.7% was achieved along with suitable recoveries and selectivity. This methodology offers a different approach for electroanalytical methodologies using mag-MIPs.
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Affiliation(s)
- Gerson A Ruiz-Córdova
- Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Lima, Peru; Department of Analytical Chemistry, Institute of Chemistry, UNESP - Univ Estadual Paulista, Araraquara, SP, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Araraquara, SP, Brazil
| | - Sabir Khan
- Department of Analytical Chemistry, Institute of Chemistry, UNESP - Univ Estadual Paulista, Araraquara, SP, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Araraquara, SP, Brazil
| | - Luís Moreira Gonçalves
- REQUIMTE/LAQV, Faculdade de Ciências, Universidade do Porto, Porto, Portugal; Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | | | - Gino Picasso
- Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Lima, Peru
| | - Maria Del Pilar T Sotomayor
- Department of Analytical Chemistry, Institute of Chemistry, UNESP - Univ Estadual Paulista, Araraquara, SP, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Araraquara, SP, Brazil.
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12
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Corrêa GT, Tanaka AA, Pividori MI, Zanoni MVB. Use of a composite electrode modified with magnetic particles for electroanalysis of azo dye removed from dyed hair strands. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.09.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Carinelli S, Xufré C, Alegret S, Martí M, Pividori MI. CD4 quantification based on magneto ELISA for AIDS diagnosis in low resource settings. Talanta 2016; 160:36-45. [PMID: 27591585 DOI: 10.1016/j.talanta.2016.06.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/21/2016] [Accepted: 06/24/2016] [Indexed: 11/29/2022]
Abstract
The Acquired Immune Deficiency Syndrome (AIDS) affects the life of millions of people around the world. Although rapid and low cost screening tests are widely available for the diagnosis of HIV infection, the count of CD4+ T lymphocytes remains a drawback in the areas mostly affected by the HIV, being this control imperative for assessing the deterioration of the immunological system and the progression towards AIDS, when the counting of cells falls down 200cellsμL(-1). This paper describes a high-throughput, simple and rapid method for CD4+ T lymphocytes quantification, directly in whole blood, based on a magneto ELISA. The CD4 cells are separated and preconcentrated from whole blood in magnetic particles, and labeled with an enzyme for the optical readout performed with a standard microplate reader. The magneto ELISA is able to reach the whole CD4 counting range of medical interest, being the limit of detection as low as 50 CD4+ cells per μL of whole blood, without any pretreatment. This method is a highly suitable alternative diagnostic tool for the expensive flow cytometry at the community and primary care level, providing a sensitive method but by using instrumentation widely available in low-resource settings laboratories and requiring low-maintenance, as is the case of a microplate reader operated by filters.
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Affiliation(s)
- S Carinelli
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - C Xufré
- Laboratori d'Immunologia Cel·lular, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - S Alegret
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - M Martí
- Laboratori d'Immunologia Cel·lular, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - M I Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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14
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Brugnera MF, Bundalian R, Laube T, Julián E, Luquin M, Zanoni MV, Pividori MI. Magneto-actuated immunoassay for the detection of Mycobacterium fortuitum in hemodialysis water. Talanta 2016; 153:38-44. [DOI: 10.1016/j.talanta.2016.02.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 02/12/2016] [Accepted: 02/16/2016] [Indexed: 10/22/2022]
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15
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Ribeiro WC, Gonçalves LM, Liébana S, Pividori MI, Bueno PR. Molecular conductance of double-stranded DNA evaluated by electrochemical capacitance spectroscopy. Nanoscale 2016; 8:8931-8938. [PMID: 27074378 DOI: 10.1039/c6nr01076h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Conductance was measured in two different double stranded DNA (both with 20 bases), the more conducting poly(dG)-poly(dC) (ds-DNAc) and the less conducting poly(dA)-poly(dT) (ds-DNAi), by means of Electrochemical Capacitance Spectroscopy (ECS). The use of the ECS approach, exemplified herein with DNA nanowires, is equally a suitable and time-dependent advantageous alternative for conductance measurement of molecular systems, additionally allowing better understanding of the alignment existing between molecular scale conductance and electron transfer rate.
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Affiliation(s)
- W C Ribeiro
- Instituto de Química, Universidade Estadual Paulista, (Nanobionics Research Group), CP 355, 14800-900, Araraquara, SP, Brazil
| | - L M Gonçalves
- Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - S Liébana
- Grup de Sensors & Biosensors, Unitat de Química Analítica, Bloc de Ciencias e Biociencias, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - M I Pividori
- Grup de Sensors & Biosensors, Unitat de Química Analítica, Bloc de Ciencias e Biociencias, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - P R Bueno
- Instituto de Química, Universidade Estadual Paulista, (Nanobionics Research Group), CP 355, 14800-900, Araraquara, SP, Brazil
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16
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Uzuriaga-Sánchez RJ, Khan S, Wong A, Picasso G, Pividori MI, Sotomayor MDPT. Magnetically separable polymer (Mag-MIP) for selective analysis of biotin in food samples. Food Chem 2016. [DOI: 10.1016/j.foodchem.2015.05.129] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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17
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Bonanni A, Pividori MI, del Valle M. DNA polymorphism sensitive impedimetric detection on gold-nanoislands modified electrodes. Talanta 2015; 136:95-101. [PMID: 25702990 DOI: 10.1016/j.talanta.2015.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/30/2014] [Accepted: 01/03/2015] [Indexed: 10/24/2022]
Abstract
Nanocomposite materials are being increasingly used in biosensing applications as they can significantly improve biosensor performance. Here we report the use of a novel impedimetric genosensor based on gold nanoparticles graphite-epoxy nanocomposite (nanoAu-GEC) for the detection of triple base mutation deletion in a cystic-fibrosis (CF) related human DNA sequence. The developed platform consists of chemisorbing gold nano-islands surrounded by rigid, non-chemisorbing, and conducting graphite-epoxy composite. The ratio of the gold nanoparticles in the composite was carefully optimized by electrochemical and microscopy studies. Such platform allows the very fast and stable thiol immobilization of DNA probes on the gold islands, thus minimizing the steric and electrostatic repulsion among the DNA probes and improving the detection of DNA polymorphism down to 2.25fmol by using electrochemical impedance spectroscopy. These findings are very important in order to develop new and renewable platforms to be used in point-of-care devices for the detection of biomolecules.
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Affiliation(s)
- Alessandra Bonanni
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 63737, Singapore.
| | - Maria Isabel Pividori
- Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain
| | - Manel del Valle
- Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain.
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18
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Kergaravat SV, Beltramino L, Garnero N, Trotta L, Wagener M, Fabiano SN, Pividori MI, Hernandez SR. Magneto immunofluorescence assay for diagnosis of celiac disease. Anal Chim Acta 2013; 798:89-96. [DOI: 10.1016/j.aca.2013.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 09/02/2013] [Accepted: 09/05/2013] [Indexed: 12/01/2022]
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19
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Kergaravat SV, Beltramino L, Garnero N, Trotta L, Wagener M, Isabel Pividori M, Hernandez SR. Electrochemical magneto immunosensor for the detection of anti-TG2 antibody in celiac disease. Biosens Bioelectron 2013; 48:203-9. [DOI: 10.1016/j.bios.2013.04.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 03/24/2013] [Accepted: 04/08/2013] [Indexed: 12/18/2022]
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20
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Brandão D, Liébana S, Campoy S, Cortés P, Alegret S, Pividori MI. Electrochemical magneto-immunosensing ofSalmonellabased on nano and micro-sized magnetic particles. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/421/1/012020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Hernandez SR, Kergaravat SV, Pividori MI. Enzymatic electrochemical detection coupled to multivariate calibration for the determination of phenolic compounds in environmental samples. Talanta 2013; 106:399-407. [DOI: 10.1016/j.talanta.2013.01.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 01/10/2013] [Accepted: 01/11/2013] [Indexed: 11/26/2022]
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22
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Cetó X, Céspedes F, Pividori MI, Gutiérrez JM, del Valle M. Resolution of phenolic antioxidant mixtures employing a voltammetric bio-electronic tongue. Analyst 2011; 137:349-56. [PMID: 22102984 DOI: 10.1039/c1an15456g] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work reports the application of a Bio-Electronic Tongue (BioET) system made from an array of enzymatic biosensors in the analysis of polyphenols, focusing on major polyphenols found in wine. For this, the biosensor array was formed by a set of epoxy-graphite biosensors, bulk-modified with different redox enzymes (tyrosinase and laccase) and copper nanoparticles, aimed at the simultaneous determination of the different polyphenols. Departure information was the set of voltammograms generated with the biosensor array, selecting some characteristic features in order to reduce the data for the Artificial Neural Network (ANN). Finally, after the ANN model optimization, it was used for the resolution and quantification of each compound. Catechol, caffeic acid and catechin formed the three-analyte case study resolved in this work. Good prediction ability was attained, therefore allowing the separate quantification of the three phenols with predicted vs. expected slope better than 0.970 for the external test set (n = 10). Finally, BioET has been also tested with spiked wine samples with good recovery yields (values of 104%, 117% and 122% for catechol, caffeic acid and catechin, respectively).
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Affiliation(s)
- Xavier Cetó
- Sensors and Biosensors Group, Department of Chemistry, Universitat Autònoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain
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23
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Fenga PG, Stradiotto NR, Pividori MI. Silver Nanocomposite Electrode Modified with Hexacyanoferrate. Preparation, Characterization and Electrochemical Behaviour Towards Substituted Anilines. ELECTROANAL 2011. [DOI: 10.1002/elan.201000651] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Fenga PG, Stradiotto NR, Pividori MI. Preparation and Characterization of Graphite-Epoxy Composite Modified with Zinc Hexacyanoferrate and Their Electrochemical Behaviour in Presence of Substituted Anilines. ELECTROANAL 2010. [DOI: 10.1002/elan.201000003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Lermo A, Fabiano S, Hernández S, Galve R, Marco MP, Alegret S, Pividori MI. Immunoassay for folic acid detection in vitamin-fortified milk based on electrochemical magneto sensors. Biosens Bioelectron 2008; 24:2057-63. [PMID: 19084389 DOI: 10.1016/j.bios.2008.10.020] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 10/21/2008] [Accepted: 10/22/2008] [Indexed: 11/25/2022]
Abstract
An immunoassay-based strategy for folic acid in vitamin-fortified milk with electrochemical detection using magneto sensors is described for the first time. Among direct and indirect competitive formats, best performance was achieved with an indirect competitive immunoassay. The immunological reaction for folic acid (FA) detection was performed, for the first time on the magnetic bead as solid support by the covalent immobilization of a protein conjugate BSA-FA on tosyl-activated magnetic bead. Further competition for the specific antibody between FA in the food sample and FA immobilized on the magnetic bead was achieved, followed by the reaction with a secondary antibody conjugated with HRP (AntiIgG-HRP). Then, the modified magnetic beads were easily captured by a magneto sensor made of graphite-epoxy composite (m-GEC) which was also used as the transducer for the electrochemical detection. The performance of the immunoassay-based strategy with electrochemical detection using magneto sensors was successfully evaluated using spiked-milk samples and compared with a novel magneto-ELISA based on optical detection. The detection limit was found to be of the order of microgl(-1) (13.1 nmoll(-1), 5.8 microgl(-1)) for skimmed milk. Commercial vitamin-fortified milk samples were also evaluated obtaining good accuracy in the results. This novel strategy offers great promise for rapid, simple, cost-effective and on-site analysis of biological and food samples.
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Affiliation(s)
- A Lermo
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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26
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Bonanni A, Pividori MI, del Valle M. Application of the avidin-biotin interaction to immobilize DNA in the development of electrochemical impedance genosensors. Anal Bioanal Chem 2007; 389:851-61. [PMID: 17676315 DOI: 10.1007/s00216-007-1490-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Revised: 06/28/2007] [Accepted: 07/04/2007] [Indexed: 11/25/2022]
Abstract
Impedance spectroscopy is a rapidly developing technique for the transduction of biosensing events at the surface of an electrode. The immobilization of biomaterial as DNA strands on the electrode surface alters the capacitance and the interfacial electron transfer resistance of the conductive electrodes. The impedimetric technique is an effective method of probing modifications to these interfacial properties, thus allowing the differentiation of hybridization events. In this work, an avidin bulk-modified graphite-epoxy biocomposite (Av-GEB) was employed to immobilize biotinylated oligonucleotides as well as double-stranded DNA onto the electrode surface. Impedance spectra were recorded to detect the change in the interfacial electron transfer resistance (R (et)) of the redox marker ferrocyanide/ferricyanide at a polarization potential of +0.17 V. The sensitivity of the technique and the good reproducibility of the results obtained with it confirm the validity of this method based on a universal affinity biocomposite platform coupled with the impedimetric technique.
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Affiliation(s)
- A Bonanni
- Sensors and Biosensors Group, Department of Chemistry, Autonomous University of Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain
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27
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Zacco E, Galve R, Marco MP, Alegret S, Pividori MI. Electrochemical biosensing of pesticide residues based on affinity biocomposite platforms. Biosens Bioelectron 2007; 22:1707-15. [PMID: 17085033 DOI: 10.1016/j.bios.2006.07.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2006] [Revised: 07/17/2006] [Accepted: 07/28/2006] [Indexed: 10/23/2022]
Abstract
A novel and very sensitive electrochemical immunosensing strategy for the detection of atrazine based on affinity biocomposite transducers is presented. Firstly, the graphite-epoxy composite transducer was bulk-modified with different universal affinity biomolecules, such as avidin and Protein A. Two strategies for the immobilization of the anti-atrazine antibodies on both biocomposite transducers were evaluated: 'wet-affinity' and 'dry-assisted affinity' immobilization. Finally, the performance of a novel anti-atrazine immunocomposite bulk-modified with anti-atrazine antibodies was also evaluated. The better immobilization performance of the anti-atrazine antibodies was achieved by 'dry-assisted affinity' immobilization on Protein A (2%) graphite-epoxy biocomposite (ProtA(2%)-GEB) as a transducer. The immunological reaction for the detection of atrazine performed on the ProtA(2%)-GEB biosensors is based on a direct competitive assay using atrazine-HRP tracer as the enzymatic label. The electrochemical detection is thus achieved through a suitable substrate and a mediator for the enzyme HRP. This novel strategy was successfully evaluated using spiked orange juice samples. The detection limit for atrazine in orange juices using the competitive electrochemical immunosensing assay was found to be 6 x 10(-3) microgL-1 (0.03 nmolL-1) thus this biosensing method accomplishes by far the LODs required for the European Community directives for potable water and food samples (0.1 microgL-1). This strategy offers great promise for rapid, simple, cost effective, and on-site biosensing of biological, food, and environmental samples.
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Affiliation(s)
- E Zacco
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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28
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Zacco E, Adrian J, Galve R, Marco MP, Alegret S, Pividori MI. Electrochemical magneto immunosensing of antibiotic residues in milk. Biosens Bioelectron 2006; 22:2184-91. [PMID: 17126544 DOI: 10.1016/j.bios.2006.10.014] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2006] [Revised: 10/06/2006] [Accepted: 10/10/2006] [Indexed: 11/19/2022]
Abstract
A novel electrochemical immunosensing strategy for the detection of sulfonamide antibiotics in milk based on magnetic beads is presented. Among the different strategies for immobilizing the class-specific anti-sulfonamide antibody to the magnetic beads--such as those based on the use of Protein A or carboxylate modified magnetic beads - ,the best strategy was found to be the covalent bonding on tosyl-activated magnetic beads. The immunological reaction for the detection of sulfonamide antibiotics performed on the magnetic bead is based on a direct competitive assay using a tracer with HRP peroxidase for the enzymatic labelling. After the immunochemical reactions, the modified magnetic beads can be easily captured by a magneto sensor made of graphite-epoxy composite (m-GEC), which is also used as the transducer for the electrochemical immunosensing. The electrochemical detection is thus achieved through a suitable substrate for the enzyme HRP and an electrochemical mediator. The electrochemical approach is also compared with a novel magneto-ELISA with optical detection. The performance of the electrochemical immunosensing strategy based on magnetic beads was successfully evaluated using spiked milk samples, and the detection limit was found to be 1.44 microg L(-1) (5.92 nmol L(-1)) for raw full cream milk. This strategy offers great promise for rapid, simple, cost-effective and on-site analysis of biological, food and environmental samples.
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Affiliation(s)
- E Zacco
- Grup de Sensors i Biosensors, Unitat de Química Analítica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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29
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Lermo A, Campoy S, Barbé J, Hernández S, Alegret S, Pividori MI. In situ DNA amplification with magnetic primers for the electrochemical detection of food pathogens. Biosens Bioelectron 2006; 22:2010-7. [PMID: 17055717 DOI: 10.1016/j.bios.2006.08.048] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2006] [Revised: 08/20/2006] [Accepted: 08/25/2006] [Indexed: 11/21/2022]
Abstract
A sensitive and selective genomagnetic assay for the electrochemical detection of food pathogens based on in situ DNA amplification with magnetic primers has been designed. The performance of the genomagnetic assay was firstly demonstrated for a DNA synthetic target by its double-hybridization with both a digoxigenin probe and a biotinylated capture probe, and further binding to streptavidin-modified magnetic beads. The DNA sandwiched target bound on the magnetic beads is then separated by using a magneto electrode based on graphite-epoxy composite. The electrochemical detection is finally achieved by an enzyme marker, anti-digoxigenin horseradish peroxidase (HRP). The novel strategy was used for the rapid and sensitive detection of polymerase chain reaction (PCR) amplified samples. Promising resultants were also achieved for the DNA amplification directly performed on magnetic beads by using a novel magnetic primer, i.e., the up PCR primer bound to magnetic beads. Moreover, the magneto DNA biosensing assay was able to detect changes at single nucleotide polymorphism (SNP) level, when stringent hybridization conditions were used. The reliability of the assay was tested for Salmonella spp., the most important pathogen affecting food safety.
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Affiliation(s)
- A Lermo
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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30
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Bonanni A, Esplandiu MJ, Pividori MI, Alegret S, del Valle M. Impedimetric genosensors for the detection of DNA hybridization. Anal Bioanal Chem 2006; 385:1195-201. [PMID: 16826371 DOI: 10.1007/s00216-006-0558-3] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2005] [Revised: 05/03/2006] [Accepted: 05/15/2006] [Indexed: 11/30/2022]
Abstract
Impedance spectroscopy is proposed as the transduction principle for detecting the hybridization of DNA complementary strands. In our experiments, different DNA oligonucleotides were used as model gene substances. The gene probe is first immobilized on a graphite-epoxy composite working electrode based genosensor. Detection principle is based on changes of impedance spectra of a redox marker, the ferro/ferricyanide couple, after hybridization with target DNA. Resistance offered to the electrochemical reaction serves as the working signal, allowing for an unlabelled gene assay.
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Affiliation(s)
- A Bonanni
- Sensors and Biosensors Group, Department of Chemistry, Autonomous University of Barcelona, Edifici Cn, 08193, Bellaterra, Barcelona, Spain
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31
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Abstract
A novel electrochemical immunosensing strategy for the detection of atrazine based on magnetic beads is presented. Different coupling strategies for the modification of the magnetic beads with the specific anti-atrazine antibody have been developed. The immunological reaction for the detection of atrazine performed on the magnetic bead is based on a direct competitive assay using a peroxidase (HRP) tracer as the enzymatic label. After the immunochemical reactions, the modified magnetic beads can be easily captured by a magnetosensor made of graphite-epoxy composite, which is also used as the transducer for the electrochemical immunosensing. The electrochemical detection is thus achieved through a suitable substrate and mediator for the enzyme HRP. The electrochemical approach is also compared with a novel magneto-ELISA based on optical detection. The performance of the electrochemical immunosensing strategy based on magnetic beads was successfully evaluated using spiked real orange juice samples. The detection limit for atrazine using the competitive electrochemical magnetoimmunosensing strategy with anti-atrazine-specific antibody covalent coupled with tosyl-activated magnetic beads was found to be 6 x 10(-3) microg L(-1) (0.027 nmol L(-1)). This strategy offers great promise for rapid, simple, cost-effective, and on-site analysis of biological, food, and environmental samples.
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Affiliation(s)
- E Zacco
- Sensors & Biosensors Group, Analytical Chemistry Division, Department of Chemistry, Autonomous University of Barcelona, 08193 Bellaterra, Catalonia, Spain
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32
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Zacco E, Pividori MI, Alegret S. Electrochemical biosensing based on universal affinity biocomposite platforms. Biosens Bioelectron 2006; 21:1291-301. [PMID: 16098736 DOI: 10.1016/j.bios.2005.05.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2005] [Revised: 05/25/2005] [Accepted: 05/26/2005] [Indexed: 10/25/2022]
Abstract
Rigid conducting biocomposites are versatile and effective transducing materials for the construction of a wide range of amperometric biosensors such as immunosensors, genosensors and enzymosensors, particularly if the transducer is bulk-modified with universal affinity biomolecules. The strept(avidin)-graphite-epoxy biocomposite could be considered as an universal immobilization platform whereon biotinylated DNAs, oligonucleotides, enzymes or antibodies can be captured by means of the highly affinity (strept)avidin-biotin reaction. Universal affinity biocomposite-based biosensors offer many potential advantages compared to more traditional electrochemical biosensors commonly based on a biologically surface-modified transducer. The integration of many materials into one matrix is their main advantage. As biological bulk-modified materials, the conducting biocomposites act not only as transducers, but also as reservoir for the biomaterial. After its use, the electrode surface can be renewed by a simple polishing procedure, establishing a clear advantage of these approaches relative to classical biosensors and other common biological assays. Moreover, the same material is useful for the analysis of many molecules whose determinations are based on genetic, enzymatic or immunological reactions. The different strategies for electrochemical genosensing, immunosensing and enzymosensing, all of them being dependent on the presence of a redox enzyme marker for the generation of the electrochemical signal, based on this universal affinity biocomposite platform are all presented and discussed.
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Affiliation(s)
- E Zacco
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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33
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Pumera M, Castañeda MT, Pividori MI, Eritja R, Merkoçi A, Alegret S. Magnetically trigged direct electrochemical detection of DNA hybridization using Au67 quantum dot as electrical tracer. Langmuir 2005; 21:9625-9. [PMID: 16207045 DOI: 10.1021/la051917k] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A novel gold nanoparticle-based protocol for detection of DNA hybridization based on a magnetically trigged direct electrochemical detection of gold quantum dot tracers is described. It relies on binding target DNA (here called DNA1) with Au(67) quantum dot in a ratio 1:1, followed by a genomagnetic hybridization assay between Au(67)-DNA1 and complementary probe DNA (here called DNA2) marked paramagnetic beads. Differential pulse voltammetry is used for a direct voltammetric detection of resulting Au(67) quantum dot-DNA1/DNA2-paramagnetic bead conjugate on magnetic graphite-epoxy composite electrode. The characterization, optimization, and advantages of the direct electrochemical detection assay for target DNA are demonstrated. The two main highlights of presented assay are (1) the direct voltammetric detection of metal quantum dots obviates their chemical dissolution and (2) the Au(67) quantum dot-DNA1/DNA2-paramagnetic bead conjugate does not create the interconnected three-dimensional network of Au-DNA duplex-paramagnetic beads as previously developed nanoparticle DNA assays, pushing down the achievable detection limits.
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Affiliation(s)
- Martin Pumera
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autonoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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Zacco E, Pividori MI, Llopis X, Del Valle M, Alegret S. Renewable Protein A modified graphite-epoxy composite for electrochemical immunosensing. J Immunol Methods 2004; 286:35-46. [PMID: 15087220 DOI: 10.1016/j.jim.2003.11.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2003] [Revised: 10/23/2003] [Accepted: 11/06/2003] [Indexed: 11/18/2022]
Abstract
A novel rigid and renewable transducing material for electrochemical immunosensing, based on Protein A bulk-modified graphite-epoxy biocomposite (ProtA-GEB) is reported. Protein A is able to bind to the Fc region of antibodies and provide an affinity matrix for antibody immobilisation onto the transducer. The rigid conducting biocomposite acts not only as a transducer, but also as a reservoir for protein A. After use, the electrode surface can be renewed by a simple polishing procedure, highlighting a clear advantage of this new approach with respect to classical immunoassays. The performance of ProtA-GEB transducers was compared with surface-modified transducers based on a simple dry adsorption procedure, where both Protein A and directly the antibody were adsorbed onto the surface of graphite-epoxy composite (ProtA/GEC and IgG/GEC, respectively). The application of the new biocomposite material in electrochemical immunosensing was studied using a model competitive immunoassay. The immunological reaction was detected using an enzymatic-labeling procedure together with the amperometric detection through a suitable substrate (H(2)O(2)) for the enzyme (HRP). The enzymatic labelling was performed using a two-step procedure based on the biotin/streptavidin interaction as well as a one-step procedure using an antibody labelled with the enzyme. Electrochemical and microscopic characterisation of ProtA-GEB transducer, optimisation of the immunosensor design as well as the stability of this material are also reported.
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Affiliation(s)
- E Zacco
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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Williams E, Pividori MI, Merkoçi A, Forster RJ, Alegret S. Rapid electrochemical genosensor assay using a streptavidin carbon-polymer biocomposite electrode. Biosens Bioelectron 2003; 19:165-75. [PMID: 14611751 DOI: 10.1016/s0956-5663(03)00171-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A sensor capable of detecting a specific DNA sequence was designed by bulk modification of a graphite epoxy composite electrode with streptavidin (2% w/w). Streptavidin is used to immobilise a biotinylated capture DNA probe to the surface of the electrode. Simultaneous hybridisation occurs between the biotin DNA capture probe and the target-DNA and between the target-DNA and a digoxigenin modified probe. The rapid binding kinetic of streptavidin-biotin allows a one step immobilisation/hybridisation procedure. Secondly, enzyme labelling of the DNA duplex occurs via an antigen-antibody reaction between the Dig-dsDNA and an anti-Dig-HRP. Finally, electrochemical detection is achieved through a suitable substrate (H2O2) for the enzyme-labelled duplex. Optimisation of the sensor design, the modifier content and the immobilisation and hybridisation times was attained using a simple nucleotide sequence. Regeneration of the surface is achieved with a simple polishing procedure that shows good reproducibility. The generic use of a modified streptavidin carbon-polymer biocomposite electrode capable of surface regeneration and a one step hybridisation/immobilisation procedure are the main advantages of this approach. In DNA analysis, this procedure, if combined with the polymerase chain reaction, would represent certain advantages with respect to classical techniques, which prove to be time consuming in situations where a simple and rapid detection is required. This innovative developed material may be used for the detection of any analyte that can be coupled to the biotin-streptavidin reaction, as is the case of immunoassays.
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Affiliation(s)
- E Williams
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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Abstract
A new electrochemical hybridisation genosensor has been designed. This genosensor is based on a concept adapted from classical dot-blot DNA analysis, but implemented in an electrochemical biosensor configuration. The use of amperometric transduction and the enzyme label method--that increases the genosensor sensitivity--are the main features of this new approach. The analytical procedure consists of five steps: DNA target immobilisation by adsorption onto a nylon membrane, hybridisation between DNA target and biotin-DNA probe, complexation reaction between biotin-DNA probe and an enzyme (horseradish peroxidase) streptavidin conjugate; integration of the modified membrane onto an electrochemical transducer; and finally, amperometric detection using a suitable substrate for the enzyme labelled duplex. Besides the adapted dot-blot format, a competitive assay in which the target is in solution is reported as well. This procedure, based on amperometric transduction, represents certain advantages with respect to dot-blot analysis: labelled hybrid detection is far simpler, quicker and requires more ordinary or simple reactives; the response obtained is a direct analytical signal via low-cost instrumentation, a nonisotopic labelling is used, and the membranes can be reused. These characteristics are ideal in implementing the procedure developed in kit form.
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Affiliation(s)
- M I Pividori
- Grup de Sensors & Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain
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Pividori MI, Merkoçi A, Alegret S. Dot-blot amperometric genosensor for detecting a novel determinant of beta-lactamase resistance in Staphylococcus aureus. Analyst 2001; 126:1551-7. [PMID: 11592648 DOI: 10.1039/b101477n] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new electrochemical hybridisation genosensor for the detection of resistant bacteria has been developed. This device relies on the immobilisation of a 50-mer oligonucleotide target, unique to a novel determinant of beta-lactamase resistance in Staphylococcus aureus, onto an electrochemical transducer. This genosensor is based on a concept adapted from classical dot-blot DNA analysis, but implemented in an electrochemical biosensor configuration. Amperometric transduction and an enzyme label method, that increases the genosensor sensitivity, are the main features of this new approach. In addition to the adapted dot-blot format, a double hybridisation assay, in which two different labelled probes were used, is reported. This procedure, if combined with polymerase chain reaction (PCR), allows determination of the genotype of an antibiotic-resistant organism in a shorter time than that required to perform traditional phenotypic susceptibility testing. Its characteristics are ideal for implementation in a kit form.
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Affiliation(s)
- M I Pividori
- Departament de Química, Universitat Autonoma de Barcelona, Bellaterra, Catalonia, Spain
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Pividori MI, Merkoçi A, Alegret S. Electrochemical genosensor design: immobilisation of oligonucleotides onto transducer surfaces and detection methods. Biosens Bioelectron 2000; 15:291-303. [PMID: 11219741 DOI: 10.1016/s0956-5663(00)00071-3] [Citation(s) in RCA: 239] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The present report reviews immobilisation techniques of purified oligonucleotides on electrochemical transducers and their corresponding detection techniques. Most of the literature reviewed was published in the 1990s. The immobilisation techniques of a DNA probe to the surface of an electrochemical transducer made from carbon, gold, platinum or polypyrrole, ranged from simple adsorption to covalent bonding. Recent efforts to couple the recognition layer containing the immobilised nucleic acid recognition layer with the electrochemical signal transducer are discussed. Special attention is given to hybridisation biosensing based on electroactive indicators.
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Affiliation(s)
- M I Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Catalonia, Spain
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