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Park IK, Choi YS, Jo SY. Development of quantitative detection methods for four Alzheimer's disease specific biomarker panels using electrochemical immunosensors based on enzyme immunoassay. ANAL SCI 2024:10.1007/s44211-024-00614-7. [PMID: 38884905 DOI: 10.1007/s44211-024-00614-7] [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: 03/04/2024] [Accepted: 06/02/2024] [Indexed: 06/18/2024]
Abstract
Accurate and timely diagnosis of Alzheimer's disease (AD) is necessary to maximize the effectiveness of treatment and using biomarkers for diagnosis is attracting attention as a minimally invasive method with few side effects. Electrochemical immunosensor (EI) is a method that is in the spotlight in the medical and bioanalytical fields due to its portability and field usability. Here, we quantified four AD specific biomarkers using EIs based on enzyme immunoassay. We selected and developed quantitative methods for the biomarkers using screen-printed gold electrodes. For three biomarkers, quantification was performed using competition immunoassays in which antigen-antibody premix mixtures were applied to antigen-immobilized electrodes and the limit of detection (LOD) values were secured, 1.20 ng/ml, 1.30 ng/ml, and 1.74 ng/ml, respectively. For the other, a sandwich immunoassay using antibody pair was selected for quantification and LOD was also achieved as 0.077 ng/ml. All four biomarkers in buffer samples were successfully quantified and reliable R2 values were obtained, and reliable calibration curves were secured for three biomarkers in spiked human serum samples. The immunosensors developed and will be optimized are expected to be used in various fields, including detection of biomarkers for not only AD but also related diseases.
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Affiliation(s)
- Il Kyu Park
- JHK Medical Science Inc., Yuseong-gu, Daejeon, 34013, Republic of Korea
| | - Young Sun Choi
- JHK Medical Science Inc., Yuseong-gu, Daejeon, 34013, Republic of Korea
| | - Seo Yun Jo
- JHK Medical Science Inc., Yuseong-gu, Daejeon, 34013, Republic of Korea.
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2
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Wang J, Zhang L, Yan G, Cheng L, Zhang F, Wu J, Lei Y, An Q, Qi H, Zhang C, Gao Q. Modified exfoliated graphene functionalized with carboxylic acid-group and thionine on a screen-printed carbon electrode as a platform for an electrochemical enzyme immunosensor. Mikrochim Acta 2024; 191:143. [PMID: 38368295 DOI: 10.1007/s00604-024-06212-8] [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: 10/31/2023] [Accepted: 01/11/2024] [Indexed: 02/19/2024]
Abstract
An enzyme immunoassay was developed based on the coulometric measurement of immunoglobulin M (IgM) against Hantaan viruses (HTNV) by using virus-like particles (VLPs) as recognition molecules. The surface functionalization of screen-printed carbon electrodes (SPCEs) was achieved through paste-exfoliated graphene that was modified with a COOH group and a thionine mediator through supramolecular-covalent scaffolds, on SPCEs by using the binder contained in the ink. After the covalent immobilization of the antibody, the sensor was used for the sandwich enzyme immunoassay of IgM against HTNV. By using HTNV VLPs as the second recognization molecules, the resulting sensor efficiently monitored the reaction of IgM against HTNV and anti-IgM antibody with high specificity. By attaching HTNV nucleocapsid protein antibody conjugate with horseradish peroxidase (HRP) onto VLPs, the signal response of the assay was derived from the coulometric measurement of H2O2 reduction mediated by thionine on the electrode surface after the application of a potential (- 0.2 V vs. Ag/AgCl). The ratio of charges measured before or after H2O2 addition was used to quantify IgM because these charges could be used as background charges or total charges, respectively. The ratio exhibited good agreement with IgM concentration within a range 0.1 to 1000 pg mL-1, and a detection limit of 0.06 pg mL-1 was obtained. The assay demonstrated high sensitivity and specificity toward HTNV-specific IgM in serum.
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Affiliation(s)
- Jing Wang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Liang Zhang
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China
| | - Guanrong Yan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Linfeng Cheng
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China
| | - Fanglin Zhang
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China.
| | - Jialin Wu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Yingfeng Lei
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China
| | - Qunxing An
- Department of Transfusion Medicine, The First Affiliated Hospital of Air Force Medical University, Xi'an, 710032, Shaanxi, China.
| | - Honglan Qi
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Chengxiao Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Qiang Gao
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China.
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3
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Novakovic Z, Khalife M, Costache V, Camacho MJ, Cardoso S, Martins V, Gadjanski I, Radovic M, Vidic J. Rapid Detection and Identification of Vancomycin-Sensitive Bacteria Using an Electrochemical Apta-Sensor. ACS OMEGA 2024; 9:2841-2849. [PMID: 38250355 PMCID: PMC10795129 DOI: 10.1021/acsomega.3c08219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/23/2023] [Accepted: 12/21/2023] [Indexed: 01/23/2024]
Abstract
In order to combat the complex and diverse infections caused by bacteria, it is essential to develop efficient diagnostic tools. Current techniques for bacterial detection rely on laborious multistep procedures, with high costs and extended time of analysis. To overcome these limitations, we propose here a novel portable electrochemical biosensor for the rapid detection and identification of Gram-positive bacteria that leverages the recognition capabilities of vancomycin and aptamers. A vancomycin-modified screen-printed carbon electrode was used to selectively capture Gram-positive bacteria susceptible to this antibiotic. Electrochemical impedance spectroscopy and scanning electron microscopy demonstrated that capture was achieved in 10 min, with a limit of detection of only 2 CFU/mL. We then tested the device's potential for aptamer-based bacterial identification using Staphylococcus aureus and Bacillus cereus as the test strains. Specifically, electrodes with captured bacteria were exposed to species-specific aptamers, and the resulting changes in current intensity were analyzed using differential pulse voltammetry. When used directly in untreated milk or serum, the system was able to successfully identify a small amount of S. aureus and B. cereus (100 CFU/mL) in less than 45 min. This novel biosensor has the potential to serve as an invaluable tool that could be used, even by inexperienced staff, in a broad range of settings including clinical diagnostics, food safety analysis, environmental monitoring, and security applications.
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Affiliation(s)
- Zorica Novakovic
- University of Novi Sad, BioSense Institute, 21000 Novi Sad, Serbia
| | - Majd Khalife
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, UMR 1319, 78350 Jouy-en-Josas, France
| | - Vlad Costache
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, UMR 1319, 78350 Jouy-en-Josas, France
- MIMA2 Imaging Core Facility, Microscopie et Imagerie des Microorganismes, Animaux et Aliments, INRAE, 78350 Jouy-en-Josas, France
| | - Maria Joao Camacho
- INESC Microsistemas e Nanotecnologias Rua Alves Redol, 1000-049 Lisbon, Portugal
| | - Susana Cardoso
- INESC Microsistemas e Nanotecnologias Rua Alves Redol, 1000-049 Lisbon, Portugal
| | - Veronica Martins
- INESC Microsistemas e Nanotecnologias Rua Alves Redol, 1000-049 Lisbon, Portugal
| | - Ivana Gadjanski
- University of Novi Sad, BioSense Institute, 21000 Novi Sad, Serbia
| | - Marko Radovic
- University of Novi Sad, BioSense Institute, 21000 Novi Sad, Serbia
| | - Jasmina Vidic
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, UMR 1319, 78350 Jouy-en-Josas, France
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4
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Fundamentals of Biosensors and Detection Methods. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1379:3-29. [PMID: 35760986 DOI: 10.1007/978-3-031-04039-9_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Biosensors have a great impact on our society to enhance the life quality, playing an important role in the development of Point-of-Care (POC) technologies for rapid diagnostics, and monitoring of disease progression. COVID-19 rapid antigen tests, home pregnancy tests, and glucose monitoring sensors represent three examples of successful biosensor POC devices. Biosensors have extensively been used in applications related to the control of diseases, food quality and safety, and environment quality. They can provide great specificity and portability at significantly reduced costs. In this chapter are described the fundamentals of biosensors including the working principles, general configurations, performance factors, and their classifications according to the type of bioreceptors and transducers. It is also briefly illustrated the general strategies applied to immobilize biorecognition elements on the transducer surface for the construction of biosensors. Moreover, the principal detection methods used in biosensors are described, giving special emphasis on optical, electrochemical, and mass-based methods. Finally, the challenges for biosensing in real applications are addressed at the end of this chapter.
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5
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Screen-Printed Electrodes (SPE) for In Vitro Diagnostic Purpose. Diagnostics (Basel) 2020; 10:diagnostics10080517. [PMID: 32722552 PMCID: PMC7460409 DOI: 10.3390/diagnostics10080517] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 06/11/2020] [Accepted: 07/21/2020] [Indexed: 02/07/2023] Open
Abstract
Due to rapidly spreading infectious diseases and the high incidence of other diseases such as cancer or metabolic syndrome, there is a continuous need for the development of rapid and accurate diagnosis methods. Screen-printed electrodes-based biosensors have been reported to offer reliable results, with high sensitivity and selectivity and, in some cases, low detection limits. There are a series of materials (carbon, gold, platinum, etc.) used for the manufacturing of working electrodes. Each version comes with advantages, as well as challenges for their functionalization. Thus, the aim is to review the most promising biosensors developed using screen-printed electrodes for the detection/quantification of proteins, biomarkers, or pathogenic microorganisms.
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6
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Cesewski E, Johnson BN. Electrochemical biosensors for pathogen detection. Biosens Bioelectron 2020; 159:112214. [PMID: 32364936 PMCID: PMC7152911 DOI: 10.1016/j.bios.2020.112214] [Citation(s) in RCA: 351] [Impact Index Per Article: 87.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 12/19/2022]
Abstract
Recent advances in electrochemical biosensors for pathogen detection are reviewed. Electrochemical biosensors for pathogen detection are broadly reviewed in terms of transduction elements, biorecognition elements, electrochemical techniques, and biosensor performance. Transduction elements are discussed in terms of electrode material and form factor. Biorecognition elements for pathogen detection, including antibodies, aptamers, and imprinted polymers, are discussed in terms of availability, production, and immobilization approach. Emerging areas of electrochemical biosensor design are reviewed, including electrode modification and transducer integration. Measurement formats for pathogen detection are classified in terms of sample preparation and secondary binding steps. Applications of electrochemical biosensors for the detection of pathogens in food and water safety, medical diagnostics, environmental monitoring, and bio-threat applications are highlighted. Future directions and challenges of electrochemical biosensors for pathogen detection are discussed, including wearable and conformal biosensors, detection of plant pathogens, multiplexed detection, reusable biosensors for process monitoring applications, and low-cost, disposable biosensors.
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Affiliation(s)
- Ellen Cesewski
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, 24061, USA; Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Blake N Johnson
- Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA, 24061, USA; Department of Materials Science and Engineering, Virginia Tech, Blacksburg, VA, 24061, USA; Department of Chemical Engineering, Virginia Tech, Blacksburg, VA, 24061, USA.
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7
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Abstract
Microbial contaminations and infections are hazardous and pose crucial concerns for humans. They result in severe morbidity and mortality around the globe. Even though dish-culturing, polymerase chain reaction (PCR), an enzyme-linked immunosorbent assay (ELISA) exhibits accurate and reliable detection of bacteria but these methods are time-consuming, laborious, and expensive. This warrants early detection and quantification of bacteria for timely diagnosis and treatment. Bacteria imprinting ensures a solution for selective and early detection of bacteria by snagging them inside their imprinted cavities. This review provides an insight into MIPs based bacterial detection strategies, challenges, and future perspectives.
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Affiliation(s)
- Shabi Abbas Zaidi
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
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8
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Kondzior M, Grabowska I. Antibody-Electroactive Probe Conjugates Based Electrochemical Immunosensors. SENSORS (BASEL, SWITZERLAND) 2020; 20:E2014. [PMID: 32260217 PMCID: PMC7180895 DOI: 10.3390/s20072014] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 12/12/2022]
Abstract
Suitable immobilization of a biorecognition element, such as an antigen or antibody, on a transducer surface is essential for development of sensitive and analytically reliable immunosensors. In this review, we report on (1) methods of antibody prefunctionalization using electroactive probes, (2) methods for immobilization of such conjugates on the surfaces of electrodes in electrochemical immunosensor construction and (3) the use of antibody-electroactive probe conjugates as bioreceptors and sensor signal generators. We focus on different strategies of antibody functionalization using the redox active probes ferrocene (Fc), anthraquinone (AQ), thionine (Thi), cobalt(III) bipyridine (Co(bpy)33+), Ru(bpy)32+ and horseradish peroxidase (HRP). In addition, new possibilities for antibody functionalization based on bioconjugation techniques are presented. We discuss strategies of specific, quantitative antigen detection based on (i) a sandwich format and (ii) a direct signal generation scheme. Further, the integration of different nanomaterials in the construction of these immunosensors is presented. Lastly, we report the use of a redox probe strategy in multiplexed analyte detection.
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Affiliation(s)
| | - Iwona Grabowska
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-748 Olsztyn, Poland;
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9
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Cimafonte M, Fulgione A, Gaglione R, Papaianni M, Capparelli R, Arciello A, Bolletti Censi S, Borriello G, Velotta R, Della Ventura B. Screen Printed Based Impedimetric Immunosensor for Rapid Detection of Escherichia coli in Drinking Water. SENSORS 2020; 20:s20010274. [PMID: 31947810 PMCID: PMC6982893 DOI: 10.3390/s20010274] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/27/2019] [Accepted: 12/30/2019] [Indexed: 12/19/2022]
Abstract
The development of a simple and low cost electrochemical impedance immunosensor based on screen printed gold electrode for rapid detection of Escherichia coli in water is reported. The immunosensor is fabricated by immobilizing anti-E. coli antibodies onto a gold surface in a covalent way by the photochemical immobilization technique, a simple procedure able to bind antibodies upright onto gold surfaces. Impedance spectra are recorded in 0.01 M phosphate buffer solution (PBS) containing 10 mM Fe(CN)63−/Fe(CN)64− as redox probe. The Nyquist plots can be modelled with a modified Randles circuit, identifying the charge transfer resistance Rct as the relevant parameter after the immobilization of antibodies, the blocking with BSA and the binding of E. coli. The introduction of a standard amplification procedure leads to a significant enhancement of the impedance increase, which allows one to measure E. coli in drinking water with a limit of detection of 3 × 101 CFU mL−1 while preserving the rapidity of the method that requires only 1 h to provide a “yes/no” response. Additionally, by applying the Langmuir adsorption model, we are able to describe the change of Rct in terms of the “effective” electrode, which is modified by the detection of the analyte whose microscopic conducting properties can be quantified.
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Affiliation(s)
- Martina Cimafonte
- Department of Physics “Ettore Pancini”, University of Naples “Federico II”, Via Cinthia, 26, 80126 Naples, Italy; (M.C.); (R.V.)
| | - Andrea Fulgione
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Via Salute, 2, 80055 Portici Naples, Italy; (A.F.); (G.B.)
- Department of Agriculture, University of Naples “Federico II”, Via Università, 133, 80055 Portici Naples, Italy; (M.P.); (R.C.)
| | - Rosa Gaglione
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cinthia, 26, 80126 Naples, Italy; (R.G.); (A.A.)
| | - Marina Papaianni
- Department of Agriculture, University of Naples “Federico II”, Via Università, 133, 80055 Portici Naples, Italy; (M.P.); (R.C.)
| | - Rosanna Capparelli
- Department of Agriculture, University of Naples “Federico II”, Via Università, 133, 80055 Portici Naples, Italy; (M.P.); (R.C.)
| | - Angela Arciello
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cinthia, 26, 80126 Naples, Italy; (R.G.); (A.A.)
| | | | - Giorgia Borriello
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Via Salute, 2, 80055 Portici Naples, Italy; (A.F.); (G.B.)
| | - Raffaele Velotta
- Department of Physics “Ettore Pancini”, University of Naples “Federico II”, Via Cinthia, 26, 80126 Naples, Italy; (M.C.); (R.V.)
| | - Bartolomeo Della Ventura
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy
- Correspondence:
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Mishra P, Singh D, Mishra K, Kaur G, Dhull N, Tomar M, Gupta V, Kumar B, Ganju L. Rapid antibiotic susceptibility testing by resazurin using thin film platinum as a bio-electrode. J Microbiol Methods 2019; 162:69-76. [DOI: 10.1016/j.mimet.2019.05.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/15/2019] [Accepted: 05/15/2019] [Indexed: 01/24/2023]
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11
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Electric field assisted deposition of E. coli bacteria into the pores of porous silicon. J Microbiol Methods 2019; 161:96-101. [DOI: 10.1016/j.mimet.2019.04.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 04/26/2019] [Accepted: 04/26/2019] [Indexed: 01/17/2023]
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12
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Jafari H, Amiri M, Abdi E, Navid SL, Bouckaert J, Jijie R, Boukherroub R, Szunerits S. Entrapment of uropathogenic E. coli cells into ultra-thin sol-gel matrices on gold thin films: A low cost alternative for impedimetric bacteria sensing. Biosens Bioelectron 2019; 124-125:161-166. [PMID: 30368107 DOI: 10.1016/j.bios.2018.10.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 10/07/2018] [Accepted: 10/15/2018] [Indexed: 01/28/2023]
Abstract
Bacterial infections are causing worldwide morbidity and mortality. One way to limit infectious outbreaks and optimize clinical management of infections is through the development of fast and sensitive sensing of bacteria. Most sensing approaches are currently based on immunological detection principles. We report here on an impedimetric sensor to selectively and sensitive detect uropathogenic E. coli cells (E. coli UTI89) using artificial recognition sites. We show here the possibility to imprint the rod-shape structure of E. coli UTI 89 into ultra-thin inorganic silica coatings on gold electrodes in a reproducible manner. A linear range from to 1 × 100 -1 × 104 cfu mL-1 is obtained. With a detection limit for E. coli UTI89 below 1 cfu mL-1 from five blank signals (95% confidence level) and excellent selective binding capabilities, these bacterial cell imprinted electrodes brings us closer to a low cost specific bacterial recognition surfaces.
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Affiliation(s)
- Hamed Jafari
- Department of Chemistry, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Mandana Amiri
- Department of Chemistry, University of Mohaghegh Ardabili, Ardabil, Iran; Biosensors and Bioelectronics Research Center (BBRC), Ardabil University of Medical Sciences, Ardabil, Iran.
| | - Esmat Abdi
- Department of Biology, University of Mohaghegh Ardabili, Ardabil, Iran
| | | | - Julie Bouckaert
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF), Univ. Lille, CNRS, UMR 8576, 59655 Villeneuve d'Ascq, France
| | - Roxana Jijie
- Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520-IEMN, F-59000 Lille, France
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520-IEMN, F-59000 Lille, France
| | - Sabine Szunerits
- Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520-IEMN, F-59000 Lille, France.
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13
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Affiliation(s)
- Ariel L. Furst
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
| | - Matthew B. Francis
- Department of Chemistry, University of California, Berkeley, California 94720-1460, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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14
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Ghosh Dastider S, Abdullah A, Jasim I, Yuksek NS, Dweik M, Almasri M. Low concentration E. coli O157:H7 bacteria sensing using microfluidic MEMS biosensor. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:125009. [PMID: 30599553 DOI: 10.1063/1.5043424] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This paper reports the design, fabrication, and testing of a microfluidic MEMS biosensor for rapid sensing of low concentration Escherichia coli O157:H7. It consists of a specially designed focusing and sensing region, which enables the biosensor to detect low concentration of bacterial cells. The focusing region consists of a ramped vertical electrode pair made of electroplated gold along with tilted thin film finger pairs (45°) embedded inside a microchannel. The focusing region generates positive dielectrophoresis force, which moves the cells towards the edges of the tilted thin film electrode fingers, located at the center of the microchannel. The fluidic drag force then carries the focused cells to the sensing region, where three interdigitated electrode arrays (IDEAs) with 30, 20, and 10 pairs, respectively, are embedded inside the microchannel. This technique resulted in highly concentrated samples in the sensing region. The sensing IDEAs are functionalized with the anti-E. coli antibody for specific sensing of E. coli 0157:H7. As E. coli binds to the antibody, it results in an impedance change, which is measured across a wide frequency range of 100 Hz-10 MHz. The biosensor was fabricated on a glass substrate using the SU8 epoxy resist to form the microchannel, gold electroplating to form the vertical focusing electrode pair, a thin gold film to form the sensing electrode, the finger electrodes, traces and bonding pads, and polydimethylsiloxane to seal the device. The microfluidic impedance biosensor was tested with various low concentration bacterial samples and was able to detect bacterial concentration, as low as 39 CFU/ml with a total sensing time of 2 h.
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Affiliation(s)
- Shibajyoti Ghosh Dastider
- Department of Electrical and Computer Engineering, University of Missouri, Columbia, Missouri 65211, USA
| | - Amjed Abdullah
- Department of Electrical and Computer Engineering, University of Missouri, Columbia, Missouri 65211, USA
| | - Ibrahem Jasim
- Department of Electrical and Computer Engineering, University of Missouri, Columbia, Missouri 65211, USA
| | - Nuh S Yuksek
- Department of Electrical and Computer Engineering, University of Missouri, Columbia, Missouri 65211, USA
| | - Majed Dweik
- Department of Co-operative Research, Lincoln University, Jefferson City, Missouri 65101, USA
| | - Mahmoud Almasri
- Department of Electrical and Computer Engineering, University of Missouri, Columbia, Missouri 65211, USA
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15
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Treated Gold Screen-Printed Electrode as Disposable Platform for Label-Free Immunosensing of Salmonella Typhimurium. Electrocatalysis (N Y) 2018. [DOI: 10.1007/s12678-018-0491-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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16
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Li Y, Ma H, Gan L, Gong A, Zhang H, Liu D, Sun Q. Selective and sensitive Escherichia coli detection based on a T4 bacteriophage-immobilized multimode microfiber. JOURNAL OF BIOPHOTONICS 2018; 11:e201800012. [PMID: 29664205 DOI: 10.1002/jbio.201800012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 04/12/2018] [Indexed: 06/08/2023]
Abstract
Escherichia coli bacteria have been found to be responsible for various health outbreaks caused by contaminated food and water. Accurate and rapid test of E. coli is thus crucial for protecting the public health. A fast-response, label-free bacteriophage-based detection of E. coli using multimode microfiber probe is proposed and demonstrated in this article. Due to the abrupt taper and subwavelength diameter, different modes are excited and guided in the microfiber as evanescent field that can interact with surrounding E. coli directly. The change of E. coli concentration and corresponding binding of E. coli bacteria on microfiber surface will lead to the shift of optical spectrum, which can be exploited for the application of biosensing. The proposed method is capable of reliable detection of E. coli concentration as low as 103 cfu/mL within the range of 103 to 107 cfu/mL. Owing to the advantages of high sensitivity and fast response, the microfiber probe has great potential application in the fields of environment monitoring and food safety.
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Affiliation(s)
- Yanpeng Li
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Hui Ma
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Lin Gan
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Andong Gong
- College of Life Science, Xinyang Normal University, Xinyang, Henan, China
| | - Haibin Zhang
- College of Life Science, Xinyang Normal University, Xinyang, Henan, China
| | - Deming Liu
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qizhen Sun
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Biosensors for the Detection of Interaction between Legionella pneumophila Collagen-Like Protein and Glycosaminoglycans. SENSORS 2018; 18:s18082668. [PMID: 30110899 PMCID: PMC6111780 DOI: 10.3390/s18082668] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 08/08/2018] [Accepted: 08/10/2018] [Indexed: 01/18/2023]
Abstract
The adhesin Legionella collagen-like (Lcl) protein can bind to extracellular matrix components and mediate the binding of Legionella pneumophila to host cells. In this study, electrochemical impedance spectroscopy (EIS) and surface plasmon resonance (SPR)-based biosensors were employed to characterize these interactions between glycosaminoglycans (GAGs) and the adhesin Lcl protein. Fucoidan displayed a high affinity (KD 18 nM) for Lcl protein. Chondroitin sulfate A and dermatan sulfate differ in the position of a carboxyl group replacing D-glucuronate with D-iduronate. Our results indicated that the presence of D-iduronate in dermatan sulfate strongly hindered its interaction with Lcl. These biophysical studies provided valuable information in our understanding of adhesin-ligand interactions related to Legionella pneumophila infections.
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Malvano F, Pilloton R, Albanese D. Sensitive Detection of Escherichia coli O157:H7 in Food Products by Impedimetric Immunosensors. SENSORS 2018; 18:s18072168. [PMID: 29976909 PMCID: PMC6068834 DOI: 10.3390/s18072168] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/02/2018] [Accepted: 07/04/2018] [Indexed: 11/16/2022]
Abstract
In this work, the development of an impedimetric label-free immunosensor for the detection of Escherichia coli O157:H7 is reported. Different immobilization techniques of monoclonal anti-E. coli were tested, in order to reach the very low limit of detections. The comparison between the immobilization procedures underlined the advantages of the oriented procedure and the use of a dendrimer, which allowed for immobilizing a higher number of antibody units, reaching a very high sensitivity. However, the use of activated ferrocene as electron-transferring mediator, which improved the electrical properties of the system, resulted in a very low limit of detection equal to 3 cfu/mL. This immunosensor was used to analyze milk and meat samples obtaining a good agreement with the results of the ELISA methods.
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Affiliation(s)
- Francesca Malvano
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy.
| | - Roberto Pilloton
- Institute of Crystallography of the National Council of Research (CNR), 00015 Monterotondo Scalo, Italy.
| | - Donatella Albanese
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy.
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19
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Cao L, Zhang Q, Dai H, Fu Y, Li Y. Separation/Concentration-signal-amplification in-One Method Based on Electrochemical Conversion of Magnetic Nanoparticles for Electrochemical Biosensing. ELECTROANAL 2018. [DOI: 10.1002/elan.201700653] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lulu Cao
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Qi Zhang
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Huang Dai
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Yingchun Fu
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
| | - Yanbin Li
- College of Biosystems Engineering and Food Science; Zhejiang University; Hangzhou 310058 China
- Department of Biological and Agricultural Engineering; University of Arkansas; Fayetteville, AR 72701 USA
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20
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Gutiérrez-del-Río I, Marín L, Fernández J, Álvarez San Millán M, Ferrero FJ, Valledor M, Campo JC, Cobián N, Méndez I, Lombó F. Development of a biosensor protein bullet as a fluorescent method for fast detection of Escherichia coli in drinking water. PLoS One 2018; 13:e0184277. [PMID: 29304041 PMCID: PMC5755745 DOI: 10.1371/journal.pone.0184277] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/21/2017] [Indexed: 11/23/2022] Open
Abstract
Drinking water can be exposed to different biological contaminants from the source, through the pipelines, until reaching the final consumer or industry. Some of these are pathogenic bacteria and viruses which may cause important gastrointestinal or systemic diseases. The microbiological quality of drinking water relies mainly in monitoring three indicator bacteria of faecal origin, Escherichia coli, Enterococcus faecalis and Clostridium perfringens, which serve as early sentinels of potential health hazards for the population. Here we describe the analysis of three chimeric fluorescent protein bullets as biosensor candidates for fast detection of E. coli in drinking water. Two of the chimeric proteins (based on GFP-hadrurin and GFP-pb5 chimera proteins) failed with respect to specificity and/or sensitivity, but the GFP-colS4 chimera protein was able to carry out specific detection of E. coli in drinking water samples in a procedure encompassing about 8 min for final result and this biosensor protein was able to detect in a linear way between 20 and 103 CFU of this bacterium. Below 20 CFU, the system cannot differentiate presence or absence of the target bacterium. The fluorescence in this biosensor system is provided by the GFP subunit of the chimeric protein, which, in the case of the better performing sensor bullet, GFP-colS4 chimera, is covalently bound to a flexible peptide bridge and to a bacteriocin binding specifically to E. coli cells. Once bound to the target bacteria, the excitation step with 395 nm LED light causes emission of fluorescence from the GFP domain, which is amplified in a photomultiplier tube, and finally this signal is converted into an output voltage which can be associated with a CFU value and these data distributed along mobile phone networks, for example. This method, and the portable fluorimeter which has been developed for it, may contribute to reduce the analysis time for detecting E. coli presence in drinking water.
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Affiliation(s)
- Ignacio Gutiérrez-del-Río
- Research Group BIONUC, Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Principality of Asturias, Spain
| | - Laura Marín
- Research Group BIONUC, Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Principality of Asturias, Spain
| | - Javier Fernández
- Research Group BIONUC, Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Principality of Asturias, Spain
| | - María Álvarez San Millán
- Research Group BIONUC, Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Principality of Asturias, Spain
| | - Francisco Javier Ferrero
- Department of Electric, Electronic, Computer and Systems Engineering, University of Oviedo, Campus of Gijón, Gijón, Principality of Asturias, Spain
| | - Marta Valledor
- Department of Electric, Electronic, Computer and Systems Engineering, University of Oviedo, Campus of Gijón, Gijón, Principality of Asturias, Spain
| | - Juan Carlos Campo
- Department of Electric, Electronic, Computer and Systems Engineering, University of Oviedo, Campus of Gijón, Gijón, Principality of Asturias, Spain
| | | | | | - Felipe Lombó
- Research Group BIONUC, Departamento de Biología Funcional, Área de Microbiología, University of Oviedo, Oviedo, Principality of Asturias, Spain
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21
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Li Y, Ma H, Gan L, Gong A, Zhang H, Liu D, Sun Q. Immobilized optical fiber microprobe for selective and sensitive Escherichia coli detection. JOURNAL OF BIOPHOTONICS 2017:e201700162. [PMID: 29064161 DOI: 10.1002/jbio.201700162] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 09/24/2017] [Accepted: 10/22/2017] [Indexed: 06/07/2023]
Abstract
Escherichia coli (E. coli) bacteria have been found to be responsible for various health outbreaks caused by contaminated food and water. Accurate and rapid test of E. coli is thus crucial for protecting the public health. A fast-response, label-free bacteriophage-based detection of E. coli using multimode microfiber probe is proposed and demonstrated in this paper. Due to the abrupt taper and subwavelength diameter, different modes are excited and guided in the microfiber as evanescent field that can interact with surrounding E. coli directly. The change of E. coli concentration and corresponding binding of E. coli bacteria on microfiber surface will lead to the shift of optical spectrum, which can be exploited for the application of biosensing. The proposed method is capable of reliable detection of E. coli concentration as low as 103 cfu/mL within the range of 103 to 107 cfu/mL. Owing to the advantages of high sensitivity and fast response, the microfiber probe has great potential application in the fields of environment monitoring and food safety.
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Affiliation(s)
- Yanpeng Li
- School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan, Hubei, China
| | - Hui Ma
- School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan, Hubei, China
| | - Lin Gan
- School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan, Hubei, China
| | - Andong Gong
- College of Life Science, Xinyang Normal University Xinyang, Henan, China
| | - Haibin Zhang
- College of Life Science, Xinyang Normal University Xinyang, Henan, China
| | - Deming Liu
- School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan, Hubei, China
| | - Qizhen Sun
- School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan, Hubei, China
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22
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Karczmarczyk A, Baeumner AJ, Feller KH. Rapid and sensitive inhibition-based assay for the electrochemical detection of Ochratoxin A and Aflatoxin M1 in red wine and milk. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.046] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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23
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Hoyos-Nogués M, Brosel-Oliu S, Abramova N, Muñoz FX, Bratov A, Mas-Moruno C, Gil FJ. Impedimetric antimicrobial peptide-based sensor for the early detection of periodontopathogenic bacteria. Biosens Bioelectron 2016; 86:377-385. [DOI: 10.1016/j.bios.2016.06.066] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/13/2016] [Accepted: 06/21/2016] [Indexed: 01/16/2023]
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24
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Xu M, Wang R, Li Y. Electrochemical biosensors for rapid detection of Escherichia coli O157:H7. Talanta 2016; 162:511-522. [PMID: 27837864 DOI: 10.1016/j.talanta.2016.10.050] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 10/06/2016] [Accepted: 10/10/2016] [Indexed: 12/17/2022]
Abstract
Electrochemical biosensors have shown great promise in the development of rapid methods for the detection of foodborne pathogens and have been intensively studied over the past two decades. The scope of this review is to summarize the advancements made in the development of electrochemical biosensors for the rapid detection of one of the most common foodborne pathogens, Escherichia coli O157:H7. The article is intended to include different configurations of electrochemical biosensors based on the sensing principles and measured electrical parameters, as well as the latest improvements of technology in the progress of electrochemical biosensor development to detect E. coli O157:H7. By discussing the current and future trend based on some of excellent published literatures and reviews, this survey is hoped to illustrate a broad and comprehensive understanding of electrochemical biosensors for the detection of foodborne pathogens.
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Affiliation(s)
- Meng Xu
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA
| | - Ronghui Wang
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA
| | - Yanbin Li
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA; Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA.
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25
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Li Z, Fu Y, Fang W, Li Y. Electrochemical Impedance Immunosensor Based on Self-Assembled Monolayers for Rapid Detection of Escherichia coli O157:H7 with Signal Amplification Using Lectin. SENSORS 2015; 15:19212-24. [PMID: 26251911 PMCID: PMC4570367 DOI: 10.3390/s150819212] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Revised: 07/10/2015] [Accepted: 07/14/2015] [Indexed: 12/30/2022]
Abstract
Escherichia coli O157:H7 is a predominant foodborne pathogen with severe pathogenicity, leading to increasing attention given to rapid and sensitive detection. Herein, we propose an impedance biosensor using new kinds of screen-printed interdigitated microelectrodes (SPIMs) and wheat germ agglutinin (WGA) for signal amplification to detect E. coli O157:H7 with high sensitivity and time-efficiency. The SPIMs integrate the high sensitivity and short response time of the interdigitated electrodes and the low cost of the screen-printed electrodes. Self-assembling of bi-functional 3-dithiobis-(sulfosuccinimidyl-propionate) (DTSP) on the SPIMs was investigated and was proved to be able to improve adsorption quantity and stability of biomaterials. WGA was further adopted to enhance the signal taking advantage of the abundant lectin-binding sites on the bacteria surface. The immunosensor exhibited a detection limit of 102 cfu·mL−1, with a linear detection range from 102 to 107 cfu·mL−1 (r2 = 0.98). The total detection time was less than 1 h, showing its comparable sensitivity and rapid response. Furthermore, the low cost of one SPIM significantly reduced the detection cost of the biosensor. The biosensor may have great promise in food safety analysis and lead to a portable biosensing system for routine monitoring of foodborne pathogens.
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Affiliation(s)
- Zhanming Li
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Yingchun Fu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
| | - Weihuan Fang
- College of Animal Science, Zhejiang University, Hangzhou 310058, China.
| | - Yanbin Li
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
- Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA.
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27
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Characterisation of electrochemical immunosensor for detection of viable not-culturable forms of Legionellla pneumophila in water samples. CHEMICAL PAPERS 2015. [DOI: 10.1515/chempap-2015-0170] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractLegionella pneumophila may cause a fatal pneumonia in humans known as Legionnaires’ disease (LD). The strategies of L. pneumophila to adapt to and resist stressful environmental conditions include the ability to enter into a VBNC (viable but not culturable) state. The detection of L. pneumophila in environmental samples benefits from the use of standardised methods: for detection and enumeration following membrane filtration (AFNOR T90-431, ISO 11731) and detection and quantification by polymerase chain reaction PCR (AFNOR T90-471, ISO 12869). Culture is hampered by its inability to detect VBNC forms and PCR is unable to discriminate between live and dead bacteria. The present immunosensor was obtained by the immobilisation of a monoclonal anti-L. pneumophila antibody (MAb) on an indium-tin oxide (ITO) electrode by the self-assembled monolayers (SAMs) method using an aminosilane. The immunosensor was characterised by wettability (contact angle measurement), atomic force microscopy (AFM), confocal laser scanning microscopy (CLSM), and electrochemical impedance spectroscopy (EIS). A limit of detection of 10 bacteria per mL was observed on artificial samples.
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28
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Bahadır EB, Sezgintürk MK. A review on impedimetric biosensors. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:248-62. [DOI: 10.3109/21691401.2014.942456] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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29
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Veloso AJ, Chow AM, Ganesh HVS, Li N, Dhar D, Wu DCH, Mikhaylichenko S, Brown IR, Kerman K. Electrochemical Immunosensors for Effective Evaluation of Amyloid-Beta Modulators on Oligomeric and Fibrillar Aggregation Processes. Anal Chem 2014; 86:4901-9. [DOI: 10.1021/ac500424t] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
| | - Ari M. Chow
- Centre
for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
| | - Hashwin V. S. Ganesh
- Centre
for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
| | - Nan Li
- Department
of Physical and Environmental Sciences and
| | - Devjani Dhar
- Department
of Physical and Environmental Sciences and
| | | | | | - Ian R. Brown
- Centre
for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
| | - Kagan Kerman
- Department
of Physical and Environmental Sciences and
- Centre
for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
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30
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Taleat Z, Khoshroo A, Mazloum-Ardakani M. Screen-printed electrodes for biosensing: a review (2008–2013). Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1181-1] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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31
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Yáñez-Sedeño P, Agüí L, Villalonga R, Pingarrón JM. Biosensors in forensic analysis. A review. Anal Chim Acta 2014; 823:1-19. [PMID: 24746348 DOI: 10.1016/j.aca.2014.03.011] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 03/09/2014] [Accepted: 03/11/2014] [Indexed: 02/04/2023]
Abstract
Forensic analysis is an important branch of modern Analytical Chemistry with many legal and socially relevant implications. Biosensors can play an important role as efficient tools in this field considering their well known advantages of sensitivity, selectivity, easy functioning, affordability and capability of miniaturization and automation. This article reviews the latest advances in the use of biosensors for forensic analysis. The different methodologies for the transduction of the produced biological events are considered and the applications to forensic toxicological analysis, classified by the nature of the target analytes, as well as those related with chemical and biological weapons critically commented. The article provides several Tables where the more relevant analytical characteristics of the selected reported methods are gathered.
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Affiliation(s)
- P Yáñez-Sedeño
- University Complutense, Department of Analytical Chemistry, Faculty of Chemistry, Ciudad Universitaria, Madrid 28040, Spain.
| | - L Agüí
- University Complutense, Department of Analytical Chemistry, Faculty of Chemistry, Ciudad Universitaria, Madrid 28040, Spain
| | - R Villalonga
- University Complutense, Department of Analytical Chemistry, Faculty of Chemistry, Ciudad Universitaria, Madrid 28040, Spain
| | - J M Pingarrón
- University Complutense, Department of Analytical Chemistry, Faculty of Chemistry, Ciudad Universitaria, Madrid 28040, Spain
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Li Y, Afrasiabi R, Fathi F, Wang N, Xiang C, Love R, She Z, Kraatz HB. Impedance based detection of pathogenic E. coli O157:H7 using a ferrocene-antimicrobial peptide modified biosensor. Biosens Bioelectron 2014; 58:193-9. [PMID: 24637168 DOI: 10.1016/j.bios.2014.02.045] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 02/14/2014] [Accepted: 02/17/2014] [Indexed: 01/20/2023]
Abstract
Escherichia coli O157:H7 can cause life-threatening gastrointestinal diseases and has been a severe public health problem worldwide in recent years. A novel biosensor for the detection of E. coli O157:H7 is described here using a film composed of ferrocene-peptide conjugates, in which the antimicrobial peptide magainin I has been incorporated as the biorecognition element. Electrochemical impedance spectroscopy was employed to investigate the surface characteristics of the newly developed biosensor and to monitor the interactions between the peptide film and the pathogenic bacteria. X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry (ToF-SIMS) were employed to confirm the immobilization of ferrocene-conjugate onto the gold surface. Non-pathogenic E. coli K12, Staphylococcus epidermidis and Bacillus subtilis were used in this study to evaluate the selectivity of the proposed biosensor. The results have shown the order of the preferential selectivity of the method is E. coli O157:H7>non-pathogenic E. coli>gram positive species. The detection of E. coli O157:H7 with a sensitivity of 10(3)cfu/mL is enabled by the biosensor. The experimental conditions have been optimized and the plot of changes of charge transfer resistance (ΔRCT) and the logarithm of the cell concentration of E. coli O157:H7 shows a linear correlation in the range of 10(3)-10(7)cfu/mL with a correlation coefficient of 0.983.
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Affiliation(s)
- Yongxin Li
- Department of Sanitary Chemistry, Public Health School, West China Medical Center, Sichuan University, Chengdu 610044, PR China; Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Rouzbeh Afrasiabi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Farkhondeh Fathi
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Nan Wang
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Cuili Xiang
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada; Department of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, PR China
| | - Ryan Love
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Zhe She
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada.
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33
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Impedimetric aptasensor for Staphylococcus aureus based on nanocomposite prepared from reduced graphene oxide and gold nanoparticles. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1195-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Development of electrochemical immunosensors towards point of care diagnostics. Biosens Bioelectron 2013; 47:1-11. [DOI: 10.1016/j.bios.2013.02.045] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/27/2013] [Accepted: 02/28/2013] [Indexed: 12/21/2022]
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35
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Wang M, Kang H, Xu D, Wang C, Liu S, Hu X. Label-free impedimetric immunosensor for sensitive detection of fenvalerate in tea. Food Chem 2013; 141:84-90. [PMID: 23768331 DOI: 10.1016/j.foodchem.2013.02.098] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 12/24/2012] [Accepted: 02/27/2013] [Indexed: 11/25/2022]
Abstract
In this experiment, fenvalerate antibodies were immobilised on the electrode by the crosslinking with glutaraldehyde modified on the glassy carbon electrode (GCE) via chitosan. Fenvalerate was measured by the increase of electron transfer resistance when the immune reaction occurred with Fe(CN)6(3-)/Fe(CN)6(4-) as the probe. Under optimal conditions, the change of resistance is in a linear relationship with the logarithm of the concentration in the range of 1.0×10(-3)∼1.0×10(1)mg/L (R=0.998) with a detection limit of 0.80 μg/L. This method bears such merits as simplicity of operation, high sensitivity, wide linear range, specificity, reproducibility and good stability. The immunosensor was applied in the detection of real samples of tea, achieving satisfactory results, and it could be regenerated after being placed alternately in 0.5 mol/L HCl and 0.5 mol/L NaOH solutions.
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Affiliation(s)
- Meirong Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring, Yangzhou University, 180 Si-Wang-Ting Road, Yangzhou 225002, China
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36
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Lu L, Chee G, Yamada K, Jun S. Electrochemical impedance spectroscopic technique with a functionalized microwire sensor for rapid detection of foodborne pathogens. Biosens Bioelectron 2012; 42:492-5. [PMID: 23238324 DOI: 10.1016/j.bios.2012.10.060] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 10/05/2012] [Accepted: 10/18/2012] [Indexed: 10/27/2022]
Abstract
In this study, a label-free biosensor based on electrochemical impedance measurement followed by dielectrophoretic force and antibody-antigen interaction was developed for detection and quantification of foodborne pathogenic bacteria. In our previous work, gold-tungsten wires (25 μm in diameter) were functionalized by coating with polyethyleneimine-streptavidin-anti-Escherichia coli antibodies to improve sensing specificity, and fluorescence intensity measurement was employed to quantify bacteria captured by the sensor. The focus of this research is to evaluate the performance of the developed biosensor by monitoring the changes of electron-transfer resistance (ΔR(et)) of the microwire after the bioaffinity reaction between bacterial cells and antibodies on its surface as an alternative quantification technique to fluorescence microscopy. Electrochemical impedance spectroscopy (EIS) has been used to detect and validate the resistance changes in a conventional three-electrode system in which [Fe(CN)₆³⁻]/[Fe(CN)₆⁴⁻] served as the redox probe. The impedance data demonstrated a linear relationship between the increments of ΔR(et) and the logarithmic concentrations of E. coli suspension in the range of 10³-10⁸ CFU/mL. In addition, there were little changes of ΔR(et) when the sensor worked with Salmonella, which clearly evidenced the sensing specificity to E. coli. EIS was proven to be an ideal alternative to fluorescence microscopy for enumeration of captured cells.
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Affiliation(s)
- Lin Lu
- Department of Molecular Biosciences and Bioengineering, 1955 East West Road, University of Hawaii, Honolulu, HI 96822, USA
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37
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Recent developments and applications of screen-printed electrodes in environmental assays—A review. Anal Chim Acta 2012; 734:31-44. [DOI: 10.1016/j.aca.2012.05.018] [Citation(s) in RCA: 365] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 05/04/2012] [Accepted: 05/12/2012] [Indexed: 11/21/2022]
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Xiao X, Zhu G, Liao L, Liu B, Yuan Y, Wang Y, He J, He B, Wu Y. A square wave voltammetric method for the detection of microorganism populations using a MWNT-modified glassy carbon electrode. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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39
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Production of a polyclonal antibody to the VP26 nucleocapsid protein of white spot syndrome virus (wssv) and its use as a biosensor. Front Chem Sci Eng 2012. [DOI: 10.1007/s11705-012-1289-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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40
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Holford TR, Davis F, Higson SP. Recent trends in antibody based sensors. Biosens Bioelectron 2012; 34:12-24. [DOI: 10.1016/j.bios.2011.10.023] [Citation(s) in RCA: 203] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 10/06/2011] [Accepted: 10/13/2011] [Indexed: 12/29/2022]
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41
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Wang Y, Ye Z, Ying Y. New trends in impedimetric biosensors for the detection of foodborne pathogenic bacteria. SENSORS (BASEL, SWITZERLAND) 2012; 12:3449-71. [PMID: 22737018 PMCID: PMC3376556 DOI: 10.3390/s120303449] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 02/23/2012] [Accepted: 02/23/2012] [Indexed: 12/16/2022]
Abstract
The development of a rapid, sensitive, specific method for the foodborne pathogenic bacteria detection is of great importance to ensure food safety and security. In recent years impedimetric biosensors which integrate biological recognition technology and impedance have gained widespread application in the field of bacteria detection. This paper presents an overview on the progress and application of impedimetric biosensors for detection of foodborne pathogenic bacteria, particularly the new trends in the past few years, including the new specific bio-recognition elements such as bacteriophage and lectin, the use of nanomaterials and microfluidics techniques. The applications of these new materials or techniques have provided unprecedented opportunities for the development of high-performance impedance bacteria biosensors. The significant developments of impedimetric biosensors for bacteria detection in the last five years have been reviewed according to the classification of with or without specific bio-recognition element. In addition, some microfluidics systems, which were used in the construction of impedimetric biosensors to improve analytical performance, are introduced in this review.
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Affiliation(s)
- Yixian Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; E-Mails: (Y.W.); (Z.Y.)
| | - Zunzhong Ye
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; E-Mails: (Y.W.); (Z.Y.)
| | - Yibin Ying
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; E-Mails: (Y.W.); (Z.Y.)
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42
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Dweik M, Stringer RC, Dastider SG, Wu Y, Almasri M, Barizuddin S. Specific and targeted detection of viable Escherichia coli O157:H7 using a sensitive and reusable impedance biosensor with dose and time response studies. Talanta 2012; 94:84-9. [PMID: 22608418 DOI: 10.1016/j.talanta.2012.02.056] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 02/20/2012] [Accepted: 02/22/2012] [Indexed: 01/18/2023]
Abstract
A gold interdigitated microelectrode (IME) impedance biosensor was fabricated for the detection of viable Escherichia coli O157:H7. This sensor was fabricated using lithography techniques. The surface of the electrode was immobilized with anti-E. coli IgG antibodies. This approach is different from other studies where the change in impedance is measured in terms of growth of bacteria on the electrode, rather then the antibody/antigen bonding. The impedance values were recorded for frequency ranges between 100 Hz and 10 MHz. The working range of the dose response for this device was found to be between 2.5×10(4) CFU ml(-1) and 2.5×10(7) CFU ml(-1). The time response studies indicated that antibody/antigen binding is not a function of time, but can decrease if excess times are allowed for binding. It was observed that the impedance values for 60 min antibody/antigen binding were higher than the impedance values for 120 min binding time. The main advantages of the reported device are that, it provides for both qualitative and quantitative detection in 3h while other impedance sensors reported earlier may take up to 24h for detection. If enrichment steps are required then it may take 3-4 days to infer the results. This sensor can be used to detect different types of bacteria by immobilizing the antigen specific antibody. Most of the sensors are not reusable since they either use enzymes or enrichment steps for detection but this device can be reused, following a cleaning protocol which is easy to follow. Each device was used at least five times. The simplicity of this sensor and the ease of fabrication make this sensor a useful alternate to the microfluidics and enzyme based impedance sensors, which are relatively more difficult to fabricate, need programmable fluidic injection pumps to push the sample through the channel, suffer from limitation of coagulation and are difficult to clean.
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Affiliation(s)
- Majed Dweik
- Co-operative Research and Life & Physical Sciences, Lincoln University, Jefferson City, MO 65101, USA
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43
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Tang CK, Vaze A, Rusling JF. Fabrication of immunosensor microwell arrays from gold compact discs for detection of cancer biomarker proteins. LAB ON A CHIP 2012; 12:281-6. [PMID: 22116194 PMCID: PMC3328855 DOI: 10.1039/c1lc20833k] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A simple method is reported to fabricate gold arrays featuring microwells surrounding 8-electrodes from gold compact discs (CDs) for less than $0.2 per chip. Integration of these disposable gold CD array chips with microfluidics provided inexpensive immunoarrays that were used to measure a cancer biomarker protein quickly at high sensitivity. The gold CD sensor arrays were fabricated using thermal transfer of laserjet toner from a computer-printed pattern followed by selective chemical etching. Sensor elements had an electrochemically addressable surface area of 0.42 mm(2) with RSD <2%. For a proof-of-concept application, the arrays were integrated into a simple microfluidic device for electrochemical detection of cancer biomarker interleukin-6 (IL-6) in diluted serum. Capture antibodies of IL-6 were chemically linked onto the electrode arrays and a sandwich immunoassay protocol was developed. A biotinylated detection antibody with polymerized horseradish peroxidase labels was used for signal amplification. The detection limit of IL-6 in diluted serum was remarkably low at 10 fg mL(-1) (385 aM) with a linear response with log of IL-6 concentration from 10 to 1300 fg mL(-1). These easily fabricated, ultrasensitive, microfluidic immunosensors should be readily adapted for sensitive detection of multiple biomarkers for cancer diagnostics.
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Affiliation(s)
- Chi K. Tang
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut, 06269-3060, USA
| | - Abhay Vaze
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut, 06269-3060, USA
| | - James F. Rusling
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut, 06269-3060, USA
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut, 06032, USA
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44
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Setterington EB, Alocilja EC. Electrochemical biosensor for rapid and sensitive detection of magnetically extracted bacterial pathogens. BIOSENSORS-BASEL 2012; 2:15-31. [PMID: 25585629 PMCID: PMC4263547 DOI: 10.3390/bios2010015] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 01/04/2012] [Accepted: 01/16/2012] [Indexed: 11/16/2022]
Abstract
Biological defense and security applications demand rapid, sensitive detection of bacterial pathogens. This work presents a novel qualitative electrochemical detection technique which is applied to two representative bacterial pathogens, Bacillus cereus (as a surrogate for B. anthracis) and Escherichia coli O157:H7, resulting in detection limits of 40 CFU/mL and 6 CFU/mL, respectively, from pure culture. Cyclic voltammetry is combined with immunomagnetic separation in a rapid method requiring approximately 1 h for presumptive positive/negative results. An immunofunctionalized magnetic/polyaniline core/shell nano-particle (c/sNP) is employed to extract target cells from the sample solution and magnetically position them on a screen-printed carbon electrode (SPCE) sensor. The presence of target cells significantly inhibits current flow between the electrically active c/sNPs and SPCE. This method has the potential to be adapted for a wide variety of target organisms and sample matrices, and to become a fully portable system for routine monitoring or emergency detection of bacterial pathogens.
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Affiliation(s)
- Emma B Setterington
- Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI 48824, USA.
| | - Evangelyn C Alocilja
- Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI 48824, USA.
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Ciani I, Schulze H, Corrigan DK, Henihan G, Giraud G, Terry JG, Walton AJ, Pethig R, Ghazal P, Crain J, Campbell CJ, Bachmann TT, Mount AR. Development of immunosensors for direct detection of three wound infection biomarkers at point of care using electrochemical impedance spectroscopy. Biosens Bioelectron 2011; 31:413-8. [PMID: 22137369 DOI: 10.1016/j.bios.2011.11.004] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 10/19/2011] [Accepted: 11/04/2011] [Indexed: 01/13/2023]
Abstract
A method for label-free, electrochemical impedance immunosensing for the detection and quantification of three infection biomarkers in both buffer and directly in the defined model matrix of mock wound fluid is demonstrated. Triggering Receptor-1 Expressed on Myeloid cells (TREM-1) and Matrix MetalloPeptidase 9 (MMP-9) are detected via direct assay and N-3-oxo-dodecanoyl-l-HomoSerineLactone (HSL), relevant in bacterial quorum sensing, is detected using a competition assay. Detection is performed with gold screen-printed electrodes modified with a specific thiolated antibody. Detection is achieved in less than 1h straight from mock wound fluid without any extensive sample preparation steps. The limits of detection of 3.3 pM for TREM-1, 1.1 nM for MMP-9 and 1.4 nM for HSL are either near or below the threshold required to indicate infection. A relatively large dynamic range for sensor response is also found, consistent with interaction between neighbouring antibody-antigen complexes in the close-packed surface layer. Together, these three novel electrochemical immunosensors demonstrate viable multi-parameter sensing with the required sensitivity for rapid wound infection detection directly from a clinically relevant specimen.
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Affiliation(s)
- Ilenia Ciani
- School of Chemistry & EaStCHEM, The University of Edinburgh, Joseph Black Building, King's Buildings, West Mains Road, Edinburgh EH9 3JJ, UK
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Muñoz-Berbel X, Escudé-Pujol R, Vigués N, Cortina-Puig M, García-Aljaro C, Mas J, Muñoz FX. Real Time Automatic System for the Impedimetric Monitoring of Bacterial Growth. ANAL LETT 2011. [DOI: 10.1080/00032719.2011.553008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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47
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Development of an impedimetric immunosensor for the determination of 3-amino-2-oxazolidone residue in food samples. Anal Chim Acta 2011; 706:120-7. [DOI: 10.1016/j.aca.2011.08.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2010] [Revised: 08/07/2011] [Accepted: 08/08/2011] [Indexed: 11/18/2022]
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48
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Detecting 5-morpholino-3-amino-2-oxazolidone residue in food with label-free electrochemical impedimetric immunosensor. Food Control 2011. [DOI: 10.1016/j.foodcont.2011.03.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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49
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Cheng MS, Lau SH, Chow VT, Toh CS. Membrane-based electrochemical nanobiosensor for Escherichia coli detection and analysis of cells viability. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:6453-6459. [PMID: 21688778 DOI: 10.1021/es200884a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A sensitive and selective membrane-based electrochemical nanobiosensor is developed for specific quantitative label-free detection of Escherichia coli (E. coli) cells and analysis of viable but nonculturable (VBNC) E. coli cells which remain mostly undetected using current methods. The sensing mechanism relies on the blocking of nanochannels of a nanoporous alumina-membrane modified electrode, upon the formation of immune complexes at the nanoporous membrane. The resulting obstacle to diffusive mass transfer of a redox probe in the analysis solution to the underlying platinum electrode reduces the Faradaic signal response of the biosensor, measured using cyclic voltammetry. Antibody loading under conditions of varying antibody concentrations and pHs are optimized. The biosensor gives a low detection limit of 22 cfu mL(-1) (R(2) = 0.999) over a wide linear working range of 10 to 10(6) cfu mL(-1). It is specific toward E. coli with minimal cross-reactivity to two other pathogenic bacteria (commonly found in waters). Relative standard deviation (RSD) for triplicate measurements of 2.5% indicates reasonably useful level of reproducibility. Differentiation of live, VBNC, and dead cells are carried out after the cell capture and quantitation step, by simple monitoring of the cells' enzyme activity using the same redox probe in the analysis solution, in the presence of glucose.
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Affiliation(s)
- Ming Soon Cheng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
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50
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Mandler D, Kraus-Ophir S. Self-assembled monolayers (SAMs) for electrochemical sensing. J Solid State Electrochem 2011. [DOI: 10.1007/s10008-011-1493-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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