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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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Zhong M, Yang L, Yang H, Cheng C, Deng W, Tan Y, Xie Q, Yao S. An electrochemical immunobiosensor for ultrasensitive detection of Escherichia coli O157:H7 using CdS quantum dots-encapsulated metal-organic frameworks as signal-amplifying tags. Biosens Bioelectron 2018; 126:493-500. [PMID: 30476880 DOI: 10.1016/j.bios.2018.11.001] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/31/2018] [Accepted: 11/01/2018] [Indexed: 12/17/2022]
Abstract
We report here cadmium sulfide quantum dots (CdS QDs)-encapsulated metal-organic frameworks as signal-amplifying tags for ultrasensitive electrochemical detection of Escherichia coli O157:H7 (E. coli O157:H7). CdS QDs were encapsulated in zeolitic imidazolate framework-8 (ZIF-8) to form CdS@ZIF-8 muti-core-shell particles by in situ growth of ZIF-8 in the presence of CdS QDs. To specifically recognize E. coli O157:H7 cells, CdS@ZIF-8 particles were coated with polyethyleneimine to introduce amino groups on their surfaces, followed by surface modification of anti-E. coli O157:H7 antibody. A sandwich-type electrochemical immunobiosensor for the detection of E. coli O157:H7 was fabricated using CdS@ZIF-8 particles as signal tags. Cd(II) ions were released from CdS@ZIF-8 tags by HCl leaching, enabling the detection of E. coli O157:H7 by differential pulse voltammetry. Under the optimized conditions, the linear range of the biosensor is from 10 to 108 colony forming units (CFU) per mL for E. coli O157:H7 detection, with the detection limit of 3 CFU mL-1 (S/N = 3). The sensitivity of the biosensor for E. coli O157:H7 detection using CdS@ZIF-8 particles as signal tags is 16 times that of a biosensor using CdS QDs as signal tags, because the number of CdS QDs labeled to each bacterial cell increases greatly resulting from a great number of CdS QDs encapsulated in each CdS@ZIF-8 label. This method was successfully used to detect E. coli O157:H7 in milk samples.
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Affiliation(s)
- Miao Zhong
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Lu Yang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Hui Yang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Chang Cheng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Wenfang Deng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Yueming Tan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China.
| | - Qingji Xie
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Shouzhuo Yao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
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Walper SA, Lasarte Aragonés G, Sapsford KE, Brown CW, Rowland CE, Breger JC, Medintz IL. Detecting Biothreat Agents: From Current Diagnostics to Developing Sensor Technologies. ACS Sens 2018; 3:1894-2024. [PMID: 30080029 DOI: 10.1021/acssensors.8b00420] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Although a fundamental understanding of the pathogenicity of most biothreat agents has been elucidated and available treatments have increased substantially over the past decades, they still represent a significant public health threat in this age of (bio)terrorism, indiscriminate warfare, pollution, climate change, unchecked population growth, and globalization. The key step to almost all prevention, protection, prophylaxis, post-exposure treatment, and mitigation of any bioagent is early detection. Here, we review available methods for detecting bioagents including pathogenic bacteria and viruses along with their toxins. An introduction placing this subject in the historical context of previous naturally occurring outbreaks and efforts to weaponize selected agents is first provided along with definitions and relevant considerations. An overview of the detection technologies that find use in this endeavor along with how they provide data or transduce signal within a sensing configuration follows. Current "gold" standards for biothreat detection/diagnostics along with a listing of relevant FDA approved in vitro diagnostic devices is then discussed to provide an overview of the current state of the art. Given the 2014 outbreak of Ebola virus in Western Africa and the recent 2016 spread of Zika virus in the Americas, discussion of what constitutes a public health emergency and how new in vitro diagnostic devices are authorized for emergency use in the U.S. are also included. The majority of the Review is then subdivided around the sensing of bacterial, viral, and toxin biothreats with each including an overview of the major agents in that class, a detailed cross-section of different sensing methods in development based on assay format or analytical technique, and some discussion of related microfluidic lab-on-a-chip/point-of-care devices. Finally, an outlook is given on how this field will develop from the perspective of the biosensing technology itself and the new emerging threats they may face.
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Affiliation(s)
- Scott A. Walper
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Guillermo Lasarte Aragonés
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Kim E. Sapsford
- OMPT/CDRH/OIR/DMD Bacterial Respiratory and Medical Countermeasures Branch, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Carl W. Brown
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Clare E. Rowland
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- National Research Council, Washington, D.C. 20036, United States
| | - Joyce C. Breger
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Igor L. Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
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Zhu F, Zhao G, Dou W. A non-enzymatic electrochemical immunoassay for quantitative detection of Escherichia coli O157:H7 using Au@Pt and graphene. Anal Biochem 2018; 559:34-43. [PMID: 30144412 DOI: 10.1016/j.ab.2018.08.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/17/2018] [Accepted: 08/18/2018] [Indexed: 10/28/2022]
Abstract
Herein, a non-enzymatic sandwich-type electrochemical immunoassay was fabricated for quantitative monitoring of Escherichia coli O157:H7 (E. coli O157:H7). Silica coated Fe3O4 magnetic nanoparticles (Fe3O4@SiO2) were modified with mouse anti-E. coli O157:H7 monoclonal antibody (Ab1) to act as capture probes to reduce detection time and increase the sensitivity of the immunoassay. The Au@Pt nanoparticles were loaded on neutral red (NR) functionalized graphene to form composite complex rGO-NR-Au@Pt. rGO-NR-Au@Pt has high specific surface area and good biocompatibility. rGO-NR-Au@Pt was used as the carriers of detection antibodies (Ab2). Au@Pt catalyzed the reduction of hydrogen peroxide (H2O2) to detection of E. coli O157:H7 with the thionine (TH) as electron mediator to effectually amply the current signal. Under the optimized conditions, a linear relationship between the reduction peak current change (ΔIpc) and the logarithm of the E. coli O157:H7 concentration is obtained in the range from 4.0 × 103 to 4.0 × 108 CFU mL-1 and the limit of detection (LOD) is 4.5 × 102 CFU mL-1 at a signal-to-noise ratio of 3. The immunoassay exhibits acceptable specificity, reproducibility and stability on the detection of E. coli O157:H7. Furthermore, the immunoassay showed good performance in pork and milk samples. The results suggest that this immunoassay will be promising in the food safety area.
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Affiliation(s)
- Fanjun Zhu
- Food Safety Key Laboratory of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Guangying Zhao
- Food Safety Key Laboratory of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Wenchao Dou
- Food Safety Key Laboratory of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, China.
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Hoyos-Nogués M, Gil FJ, Mas-Moruno C. Antimicrobial Peptides: Powerful Biorecognition Elements to Detect Bacteria in Biosensing Technologies. Molecules 2018; 23:molecules23071683. [PMID: 29996565 PMCID: PMC6100210 DOI: 10.3390/molecules23071683] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 11/25/2022] Open
Abstract
Bacterial infections represent a serious threat in modern medicine. In particular, biofilm treatment in clinical settings is challenging, as biofilms are very resistant to conventional antibiotic therapy and may spread infecting other tissues. To address this problem, biosensing technologies are emerging as a powerful solution to detect and identify bacterial pathogens at the very early stages of the infection, thus allowing rapid and effective treatments before biofilms are formed. Biosensors typically consist of two main parts, a biorecognition moiety that interacts with the target (i.e., bacteria) and a platform that transduces such interaction into a measurable signal. This review will focus on the development of impedimetric biosensors using antimicrobial peptides (AMPs) as biorecognition elements. AMPs belong to the innate immune system of living organisms and are very effective in interacting with bacterial membranes. They offer unique advantages compared to other classical bioreceptor molecules such as enzymes or antibodies. Moreover, impedance-based sensors allow the development of label-free, rapid, sensitive, specific and cost-effective sensing platforms. In summary, AMPs and impedimetric transducers combine excellent properties to produce robust biosensors for the early detection of bacterial infections.
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Affiliation(s)
- Mireia Hoyos-Nogués
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, UPC, 08019 Barcelona, Spain.
| | - F J Gil
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Universitat Internacional de Catalunya (UIC), 08195 Sant Cugat del Vallès, Spain.
| | - Carlos Mas-Moruno
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain.
- Barcelona Research Center in Multiscale Science and Engineering, UPC, 08019 Barcelona, Spain.
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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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Han J, Zhang L, Hu L, Xing K, Lu X, Huang Y, Zhang J, Lai W, Chen T. Nanozyme-based lateral flow assay for the sensitive detection of Escherichia coli O157:H7 in milk. J Dairy Sci 2018; 101:5770-5779. [DOI: 10.3168/jds.2018-14429] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 03/18/2018] [Indexed: 11/19/2022]
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Shahrokhian S, Ranjbar S. Aptamer immobilization on amino-functionalized metal-organic frameworks: an ultrasensitive platform for the electrochemical diagnostic of Escherichia coli O157:H7. Analyst 2018; 143:3191-3201. [PMID: 29901674 DOI: 10.1039/c8an00725j] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the development of an electrochemical biosensor for Escherichia coli O157:H7 diagnostic based on amino-functionalized metal-organic frameworks (MOFs) as a new generation of organic-inorganic hybrid nanocomposites. The electrical and morphological properties of MOFs were enhanced by interweaving each isolated MOF crystal with polyaniline (PANI). Subsequent attachment of the amine-modified aptamer to the polyanilinated MOFs was accomplished using glutaraldehyde (GA) as a cross-linking agent. The prepared biocompatible platform was carefully characterized by means of field-emission scanning electron microscopy (FESEM), energy-dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and X-ray powder diffraction (XRD) techniques. The biosensor fabrication and its electrochemical characterizations were monitored by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. Differential pulse voltammetry (DPV) was applied to monitoring and quantitation of the interaction between the aptamer and E. coli O157:H7 using methylene blue (MB) as an electrochemical indicator. Changes in the reduction peak current of MB in the presence of E. coli O157:H7 was recorded as an analytical signal and indicated a relationship with the logarithm of the E. coli O157:H7 concentration in the range of 2.1 × 101 to 2.1 × 107 CFU mL-1 with a LOQ of 21 CFU mL-1 and LOD of 2 CFU mL-1. The electrochemical aptasensor displayed good recovery values for the detection of E. coli O157:H7 in environmental real samples and also could act as a smart device to investigate the effects of antibacterial agents against E. coli O157:H7.
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Affiliation(s)
- Saeed Shahrokhian
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran. and Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
| | - Saba Ranjbar
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran.
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59
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Zhou C, Zou H, Li M, Sun C, Ren D, Li Y. Fiber optic surface plasmon resonance sensor for detection of E. coli O157:H7 based on antimicrobial peptides and AgNPs-rGO. Biosens Bioelectron 2018; 117:347-353. [PMID: 29935488 DOI: 10.1016/j.bios.2018.06.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/17/2018] [Accepted: 06/02/2018] [Indexed: 12/19/2022]
Abstract
A fiber optic surface plasmon resonance (FOSPR) sensor was developed for detection of Escherichia coli O157:H7 (E. coli O157:H7) in water and juice, based on antimicrobial peptides (AMP), Magainin I, as recognition elements and silver nanoparticles-reduced graphene oxide (AgNPs-rGO) nanocomposites assisted signal amplification. The uniform AgNPs-rGO was fixed on the surface of optical fiber and covered with gold film. Not only was the SPR response greatly enhanced, but also the AgNPs was prevented from being oxidized. The FOSPR showed a sensitivity of about 1.5 times higher than that fabricated only with gold film. In the assay, Magainin I, immobilized on the surface of gold film, could specifically capture E. coli O157:H7, resulting in the wavelength shift of the SPR absorption peak. Under the optimized conditions, the SPR resonance wavelength exhibited a good linear relationship with natural logarithm of the target bacteria concentration in the range of 1.0 × 103 to 5.0 × 107 cfu/mL with the detection limit of 5.0 × 102 cfu/mL (S/N = 3). The FOSPR sensor showed good specificity for E. coli O157:H7 detection compared to other bacteria similar to the target bacterial species. Furthermore, the FOSPR sensor was successfully applied to the detection of E. coli O157:H7 in water, fruit and vegetable juice with the satisfactory recoveries of 88-110%. This assay for E. coli O157:H7 detection possesses high sensitivity, good selectivity, reproducibility and stability. In addition, the AMP based SPR biosensing methodology could be extended to detect a wide variety of foodborne pathogens. Therefore, the versatile method might become a potential alternative tool in food analysis and early clinical diagnosis.
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Affiliation(s)
- Chen Zhou
- West China School of Public Health, Sichuan University, Chengdu, China
| | - Haimin Zou
- West China School of Public Health, Sichuan University, Chengdu, China; Chengdu Center for Disease Control and Prevention, Chengdu, China
| | - Ming Li
- Chengdu Center for Disease Control and Prevention, Chengdu, China
| | - Chengjun Sun
- West China School of Public Health, Sichuan University, Chengdu, China
| | - Dongxia Ren
- West China School of Public Health, Sichuan University, Chengdu, China
| | - Yongxin Li
- West China School of Public Health, Sichuan University, Chengdu, China; College of Life Sciences, Sichuan University, Chengdu, China.
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Mallya AN, Ramamurthy PC. Conjugated Molecule Based Sensor for Microbial Detection in Water with E. colias a Case Study and Elucidation of Interaction Mechanism. ELECTROANAL 2018. [DOI: 10.1002/elan.201800052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ashwini N. Mallya
- Department of Materials Engineering; Indian Institute of Science; Bangalore- 560 012 India
| | - Praveen C. Ramamurthy
- Department of Materials Engineering; Indian Institute of Science; Bangalore- 560 012 India
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Labrador M, Rota MC, Pérez C, Herrera A, Bayarri S. Evaluation of a Method for Rapid Detection of Listeria monocytogenes in Dry-Cured Ham Based on Impedanciometry Combined with Chromogenic Agar. J Food Prot 2018; 81:705-712. [PMID: 29611729 DOI: 10.4315/0362-028x.jfp-17-380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The food industry is in need of rapid, reliable methodologies for the detection of Listeria monocytogenes in ready-to-eat products, as an alternative to the International Organization of Standardization (ISO) 11290-1 reference method. The aim of this study was to evaluate impedanciometry combined with chromogenic agar culture for the detection of L. monocytogenes in dry-cured ham. The experimental setup consisted in assaying four strains of L. monocytogenes and two strains of Listeria innocua in pure culture. The method was evaluated according to the ISO 16140:2003 standard through a comparative study with the ISO reference method with 119 samples of dry-cured ham. Significant determination coefficients ( R2 of up to 0.99) for all strains assayed in pure culture were obtained. The comparative study results had 100% accuracy, 100% specificity, and 100% sensitivity. Impedanciometry followed by chromogenic agar culture was capable of detecting 1 CFU/25 g of food. L. monocytogenes was not detected in the 65 commercial samples tested. The method evaluated herein represents a promising alternative for the food industry in its efforts to control L. monocytogenes. Overall analysis time is shorter and the method permits a straightforward analysis of a large number of samples with reliable results.
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Affiliation(s)
- Mirian Labrador
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón -IA2- (Universidad de Zaragoza-CITA), C/Miguel Servet 177, 50013 Zaragoza, Spain (ORCID: http://orcid.org/0000-0001-9123-4037 [M.L.])
| | - María C Rota
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón -IA2- (Universidad de Zaragoza-CITA), C/Miguel Servet 177, 50013 Zaragoza, Spain (ORCID: http://orcid.org/0000-0001-9123-4037 [M.L.])
| | - Consuelo Pérez
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón -IA2- (Universidad de Zaragoza-CITA), C/Miguel Servet 177, 50013 Zaragoza, Spain (ORCID: http://orcid.org/0000-0001-9123-4037 [M.L.])
| | - Antonio Herrera
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón -IA2- (Universidad de Zaragoza-CITA), C/Miguel Servet 177, 50013 Zaragoza, Spain (ORCID: http://orcid.org/0000-0001-9123-4037 [M.L.])
| | - Susana Bayarri
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón -IA2- (Universidad de Zaragoza-CITA), C/Miguel Servet 177, 50013 Zaragoza, Spain (ORCID: http://orcid.org/0000-0001-9123-4037 [M.L.])
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Fabrication of SrTiO₃ Layer on Pt Electrode for Label-Free Capacitive Biosensors. BIOSENSORS-BASEL 2018; 8:bios8010026. [PMID: 29547521 PMCID: PMC5872074 DOI: 10.3390/bios8010026] [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: 02/22/2018] [Revised: 03/09/2018] [Accepted: 03/13/2018] [Indexed: 11/27/2022]
Abstract
Due to their interesting ferroelectric, conductive and dielectric properties, in recent years, perovskite-structured materials have begun to attract increasing interest in the biosensing field. In this study, a strontium titanate perovskite layer (SrTiO3) has been synthesized on a platinum electrode and exploited for the development of an impedimetric label-free immunosensor for Escherichia coli O157:H7 detection. The electrochemical characterization of the perovskite-modified electrode during the construction of the immunosensor, as well as after the interaction with different E. coli O157:H7 concentrations, showed a reproducible decrease of the total capacitance of the system that was used for the analytical characterization of the immunosensor. Under optimized conditions, the capacitive immunosensor showed a linear relationship from to 1 to 7 log cfu/mL with a low detection limit of 1 log cfu/mL. Moreover, the atomic force microscopy (AFM) technique underlined the increase in roughness of the SrTiO3-modified electrode surface after antibody immobilization, as well as the effective presence of cells with the typical size of E. coli.
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Gomez-Cruz J, Nair S, Manjarrez-Hernandez A, Gavilanes-Parra S, Ascanio G, Escobedo C. Cost-effective flow-through nanohole array-based biosensing platform for the label-free detection of uropathogenic E. coli in real time. Biosens Bioelectron 2018; 106:105-110. [PMID: 29414075 DOI: 10.1016/j.bios.2018.01.055] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/18/2018] [Accepted: 01/24/2018] [Indexed: 11/16/2022]
Abstract
Rapid, inexpensive and sensitive detection of uropathogenic Escherichia coli (UPEC), a common cause of ascending urinary tract infections (UTIs) including cystitis and pyelonephritis, is critical given the increasing number of cases and its recurrence worldwide. In this paper, we present a label-free nanoplasmonic sensing platform, built with off-the-shelf optical and electronic components, which can detect intact UPEC at concentrations lower than the physiological limit for UTI diagnosis, in real time. The sensing platform consists of a red LED light source, lens assembly, CMOS detector, Raspberry Pi interface in conjugation with a metallic flow-through nanohole array-based sensor. Detection is achieved exploiting nanoplasmonic phenomena from the nanohole arrays through surface plasmon resonance imaging (SPRi) technique. The platform has a bulk sensitivity of 212 pixel intensity unit (PIU)/refractive index unit (RIU), and a resolution in the order of 10-6 RIU. We demonstrate capture and detection of UPEC with a detection limit of ~100 CFU/ml - a concentration well below the threshold limit for UTI diagnosis in clinical samples. We also demonstrate detection of UPEC in spiked human urine samples for two different concentrations of bacteria. This work is particularly relevant for point-of-care applications, especially for regions around the world where accessibility to medical facilities is heavily dependent upon economy, and availability.
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Affiliation(s)
- Juan Gomez-Cruz
- Department of Chemical Engineering, Queen's University, Kingston, ON, Canada K7L 3N6; Centro de Ciencias Aplicadas y Desarrollo Tecnológico (CCADET), Universidad Nacional Autónoma de México (UNAM), Ciudad de México 04510, México
| | - Srijit Nair
- Department of Chemical Engineering, Queen's University, Kingston, ON, Canada K7L 3N6
| | - Angel Manjarrez-Hernandez
- Departamento de Salud Pública, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México 04510, México; Unidad Periférica de Patogénesis Bacteriana en Hospital General Dr. Manuel Gea González, Ciudad de México 14080, México
| | - Sandra Gavilanes-Parra
- Departamento de Salud Pública, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Ciudad de México 04510, México; Unidad Periférica de Patogénesis Bacteriana en Hospital General Dr. Manuel Gea González, Ciudad de México 14080, México
| | - Gabriel Ascanio
- Centro de Ciencias Aplicadas y Desarrollo Tecnológico (CCADET), Universidad Nacional Autónoma de México (UNAM), Ciudad de México 04510, México
| | - Carlos Escobedo
- Department of Chemical Engineering, Queen's University, Kingston, ON, Canada K7L 3N6.
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64
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Svalova TS, Malysheva NN, Kozitsina AN. Structure of the receptor layer in electrochemical immunosensors. Modern trends and prospects of development. Russ Chem Bull 2018. [DOI: 10.1007/s11172-017-1951-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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65
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Recent trends in the development of complementary metal oxide semiconductor image sensors to detect foodborne bacterial pathogens. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2017.10.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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66
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Rapid and selective detection of E. coli O157:H7 combining phagomagnetic separation with enzymatic colorimetry. Food Chem 2017; 234:332-338. [DOI: 10.1016/j.foodchem.2017.05.013] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/06/2017] [Accepted: 05/02/2017] [Indexed: 01/15/2023]
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67
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Wen T, Wang R, Sotero A, Li Y. A Portable Impedance Immunosensing System for Rapid Detection of Salmonella Typhimurium. SENSORS 2017; 17:s17091973. [PMID: 28846643 PMCID: PMC5621372 DOI: 10.3390/s17091973] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/13/2017] [Accepted: 08/22/2017] [Indexed: 11/16/2022]
Abstract
SalmonellaTyphimurium is one of the most dangerous foodborne pathogens and poses a significant threat to human health. The objective of this study was to develop a portable impedance immunosensing system for rapid and sensitive detection of S. Typhimurium in poultry. The developed portable impedance immunosensing system consisted of a gold interdigitated array microelectrode (IDAM), a signal acquisitive interface and a laptop computer with LabVIEW software. The IDAM was first functionalized with 16-Mercaptohexadecanoic acid, and streptavidin was immobilized onto the electrode surface through covalent bonding. Then, biotin-labelled S. Typhimurium-antibody was immobilized onto the IDAM surface. Samples were dropped on the surface of the IDAM and the S. Typhimurium cells in the samples were captured by the antibody on the IDAM. This resulted in impedance changes that were measured and displayed with the LabVIEW software. An equivalent circuit of the immunosensor demonstrated that the largest change in impedance was due to the electron-transfer resistance. The equivalent circuit showed an increase of 35% for the electron-transfer resistance value compared to the negative control. The calibration result indicated that the portable impedance immunosensing system could be used to measure the standard impedance elements, and it had a maximum error of measurement of approximately 13%. For pure culture detection, the system had a linear relationship between the impedance change and the logarithmic value of S. Typhimurium cells ranging from 76 to 7.6 × 106 CFU (colony-forming unit) (50 μL)−1. The immunosensor also had a correlation coefficient of 0.98, and a high specificity for detection of S. Typhimurium cells with a limit of detection (LOD) of 102 CFU (50 μL)−1. The detection time from the moment a sample was introduced to the display of the results was 1 h. To conclude, the portable impedance immunosensing system for detection of S. Typhimurium achieved an LOD that is comparable with commercial electrochemical impedance instruments. The developed impedance immunosensor has advantages in portability, low cost, rapid detection and label-free features showing a great potential for in-field detection of foodborne pathogens.
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Affiliation(s)
- Tao Wen
- School of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha 410004, China.
- 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.
| | - America Sotero
- 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.
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68
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Luo K, Hu L, Guo Q, Wu C, Wu S, Liu D, Xiong Y, Lai W. Comparison of 4 label-based immunochromatographic assays for the detection of Escherichia coli O157:H7 in milk. J Dairy Sci 2017; 100:5176-5187. [DOI: 10.3168/jds.2017-12554] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 03/08/2017] [Indexed: 12/20/2022]
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69
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Azzouzi S, Mak WC, Kor K, Turner AP, Ali MB, Beni V. An integrated dual functional recognition/amplification bio-label for the one-step impedimetric detection of Micro-RNA-21. Biosens Bioelectron 2017; 92:154-161. [DOI: 10.1016/j.bios.2017.02.014] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 01/16/2017] [Accepted: 02/09/2017] [Indexed: 12/19/2022]
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70
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Zhou Y, Marar A, Kner P, Ramasamy RP. Charge-Directed Immobilization of Bacteriophage on Nanostructured Electrode for Whole-Cell Electrochemical Biosensors. Anal Chem 2017; 89:5734-5741. [PMID: 28485143 DOI: 10.1021/acs.analchem.6b03751] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A new type of carbon nanotube (CNT)-based impedimetric biosensing method has been developed for rapid and selective detection of live bacterial cells. A proof-of-concept study was conducted using T2 bacteriophage-based biosensors for electrochemical detection of Escherichia coli B. The T2 bacteriophage (virus) served as the biorecognition element, which was immobilized on polyethylenimine (PEI)-functionalized carbon nanotube transducer on glassy carbon electrode. Charge-directed, orientated immobilization of bacteriophage particles on carbon nanotubes was achieved through covalent linkage of phage capsid onto the carbon nanotubes. The presence of the immobilized phage on carbon nanotube-modified electrode was confirmed by fluorescence microscopy. Electrochemical impedance spectroscopy (EIS) was used to monitor the changes in the interfacial impedance due to the binding of E. coli B to T2 phage on the CNT-modified electrode. The detection was highly selective toward the B strain of E. coli as no signal was observed for the nonhost K strain of E. coli. The present achievable detection limit of the biosensor is 103 CFU/mL.
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Affiliation(s)
- Yan Zhou
- Nano Electrochemistry Laboratory, School of Chemical, Materials and Biomedical Engineering; ‡Department of Chemistry; and §School of Electrical and Computer Engineering, University of Georgia , Athens, Georgia 30602, United States
| | - Abhijit Marar
- Nano Electrochemistry Laboratory, School of Chemical, Materials and Biomedical Engineering; ‡Department of Chemistry; and §School of Electrical and Computer Engineering, University of Georgia , Athens, Georgia 30602, United States
| | - Peter Kner
- Nano Electrochemistry Laboratory, School of Chemical, Materials and Biomedical Engineering; ‡Department of Chemistry; and §School of Electrical and Computer Engineering, University of Georgia , Athens, Georgia 30602, United States
| | - Ramaraja P Ramasamy
- Nano Electrochemistry Laboratory, School of Chemical, Materials and Biomedical Engineering; ‡Department of Chemistry; and §School of Electrical and Computer Engineering, University of Georgia , Athens, Georgia 30602, United States
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71
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Chen HM, Jheng KR, Yu AD. Direct, label-free, selective, and sensitive microbial detection using a bacteriorhodopsin-based photoelectric immunosensor. Biosens Bioelectron 2017; 91:24-31. [PMID: 27987407 DOI: 10.1016/j.bios.2016.12.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 11/30/2016] [Accepted: 12/12/2016] [Indexed: 11/19/2022]
Abstract
A photoelectric immunosensor using purple membranes (PM) as the transducer, which contains photoactive bacteriorhodopsin, is here first demonstrated for direct and label-free microbial detection. Biotinylated polyclonal antibodies against Escherichia coli were immobilized on a PM-coated electrode through further surface biotinylation and bridging avidin or NeutrAvidin. The photocurrent generated by the antibody-coated sensor was reduced after incubation with E. coli K-12 cultures, with the reduction level increased with the culture populations. The immunosensor prepared via NeutrAvidin exhibited much better selectivity than the one prepared via avidin, recognizing almost none of the tested Gram-positive bacteria. Cultures with populations ranging from 1 to 107CFU/10mL were detected in a single step without any preprocessing. Both AFM and Raman analysis confirmed the layer-by-layer fabrication of the antibody-coated substrates as well as the binding of microorganisms. By investigating the effect of illumination orientation and simulating the photocurrent responses with an equivalent circuit model containing a chemical capacitance, we suggest that the photocurrent reduction was primarily caused by the light-shielding effect of the captured bacteria. Using the current fabrication technique, versatile bacteriorhodopsin-based photoelectric immunosensors can be readily prepared to detect a wide variety of biological cells.
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Affiliation(s)
- Hsiu-Mei Chen
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
| | - Kai-Ru Jheng
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - An-Dih Yu
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
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72
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Exploiting pH-Regulated Dimer-Tetramer Transformation of Concanavalin A to Develop Colorimetric Biosensing of Bacteria. Sci Rep 2017; 7:1452. [PMID: 28469128 PMCID: PMC5431225 DOI: 10.1038/s41598-017-01371-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 03/29/2017] [Indexed: 12/15/2022] Open
Abstract
Gold nanoparticles (AuNPs) aggregation-based colorimetric biosensing remains a challenge for bacteria due to their large size. Here we propose a novel colorimetric biosensor for rapid detection of Escherichia coli O157:H7 (E. coli O157:H7) in milk samples based on pH-regulated transformation of dimer/tetramer of Concanavalin A (Con A) and the Con A-glycosyl recognition. Briefly, antibody-modified magnetic nanoparticles was used to capture and concentrate E. coli O157:H7 and then to label with Con A; pH adjusted to 5 was then applied to dissociate Con A tetramer to release dimer, which was collected and re-formed tetramer at pH of 7 to cause the aggregation of dextran-modified AuNPs. The interesting pH-dependent conformation-transformation behavior of Con A innovated the design of the release from the bacteria surface and then the reconstruction of Con A. Therefore, we realized the sensitive colorimetric biosensing of bacteria, which are much larger than AuNPs that is generally not suitable for this kind of method. The proposed biosensor exhibited a limit of detection down to 41 CFU/mL, short assay time (~95 min) and satisfactory specificity. The biosensor also worked well for the detection in milk sample, and may provide a universal concept for the design of colorimetric biosensors for bacteria and virus.
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73
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She Z, Topping K, Ma T, Zhao T, Zhou W, Kamal A, Ahmadi S, Kraatz HB. Detection of the Lipopeptide Pam3CSK4 Using a Hybridized Toll-like Receptor Electrochemical Sensor. Anal Chem 2017; 89:4882-4888. [DOI: 10.1021/acs.analchem.6b04799] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhe She
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Kristin Topping
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
| | - Tianxiao Ma
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Tiantian Zhao
- Department
of Immunology, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Wenxia Zhou
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Ajar Kamal
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Soha Ahmadi
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
| | - Heinz-Bernhard Kraatz
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6, Canada
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74
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Pandey A, Gurbuz Y, Ozguz V, Niazi JH, Qureshi A. Graphene-interfaced electrical biosensor for label-free and sensitive detection of foodborne pathogenic E. coli O157:H7. Biosens Bioelectron 2016; 91:225-231. [PMID: 28012318 DOI: 10.1016/j.bios.2016.12.041] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/01/2016] [Accepted: 12/15/2016] [Indexed: 01/07/2023]
Abstract
E. coli O157:H7 is an enterohemorrhagic bacteria responsible for serious foodborne outbreaks that causes diarrhoea, fever and vomiting in humans. Recent foodborne E. coli outbreaks has left a serious concern to public health. Therefore, there is an increasing demand for a simple, rapid and sensitive method for pathogen detection in contaminated foods. In this study, we developed a label-free electrical biosensor interfaced with graphene for sensitive detection of pathogenic bacteria. This biosensor was fabricated by interfacing graphene with interdigitated microelectrodes of capacitors that were biofunctionalized with E. coli O157:H7 specific antibodies for sensitive pathogenic bacteria detection. Here, graphene nanostructures on the sensor surface provided superior chemical properties such as high carrier mobility and biocompatibility with antibodies and bacteria. The sensors transduced the signal based on changes in dielectric properties (capacitance) through (i) polarization of captured cell-surface charges, (ii) cells' internal bioactivity, (iii) cell-wall's electronegativity or dipole moment and their relaxation and (iv) charge carrier mobility of graphene that modulated the electrical properties once the pathogenic E. coli O157:H7 captured on the sensor surface. Sensitive capacitance changes thus observed with graphene based capacitors were specific to E. coli O157:H7 strain with a sensitivity as low as 10-100 cells/ml. The proposed graphene based electrical biosensor provided advantages of speed, sensitivity, specificity and in-situ bacterial detection with no chemical mediators, represents a versatile approach for detection of a wide variety of other pathogens.
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Affiliation(s)
- Ashish Pandey
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey
| | - Yasar Gurbuz
- Faculty of Engineering and Natural Science, Sabanci University, Orhanli, Tuzla, 34956 Istanbul, Turkey
| | - Volkan Ozguz
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey
| | - Javed H Niazi
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey.
| | - Anjum Qureshi
- Sabanci University Nanotechnology Research and Application Center, Orta Mah., 34956 Istanbul, Turkey.
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75
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Huang H, Liu M, Wang X, Zhang W, Yang DP, Cui L, Wang X. Label-Free 3D Ag Nanoflower-Based Electrochemical Immunosensor for the Detection of Escherichia coli O157:H7 Pathogens. NANOSCALE RESEARCH LETTERS 2016; 11:507. [PMID: 27858378 PMCID: PMC5114215 DOI: 10.1186/s11671-016-1711-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 11/01/2016] [Indexed: 06/01/2023]
Abstract
It is highly desirable to develop a rapid and simple method to detect pathogens. Combining nanomaterials with electrochemical techniques is an efficient way for pathogen detection. Herein, a novel 3D Ag nanoflower was prepared via a biomineralization method by using bovine serum albumin (BSA) as a template. It was adopted as a sensing interface to construct an electrochemical bacteria immunosensor for the rapid detection of foodborne pathogens Escherichia coli (E. coli) O157:H7. Bacterial antibody was immobilized onto the surface of Ag nanoflowers through covalent conjugation. Electrochemical impedance spectroscopy (EIS) was used to detect and validate the resistance changes, where [Fe(CN)6]3-/4- acted as the redox probe. A linear relation between R et and E. coli concentration was obtained in the E. coli concentration range of 3.0 × 102-3.0 × 108 cfu mL-1. The as-prepared biosensor gave rise to an obvious response to E. coli but had no distinct response to Cronobacter sakazakii, methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus albus, Lactobacillus easei, and Shigella flexneri, revealing a high selectivity for the detection of the pathogens down to 100 cfu mL-1 in a short time. We believe that this BSA-conjugated 3D Ag nanoflowers could be used as a powerful interface material with good conductivity and biocompatibility for improving pathogen detection and treatment in the field of medicine, environment, and food safety.
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Affiliation(s)
- He Huang
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, National Tissue Engineering Center of China, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Minghuan Liu
- College of Chemical Engineering & Materials Science, Quanzhou Normal University, Quanzhou, China
| | - Xiangsheng Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, National Tissue Engineering Center of China, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Wenjie Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, National Tissue Engineering Center of China, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Da-Peng Yang
- College of Chemical Engineering & Materials Science, Quanzhou Normal University, Quanzhou, China.
| | - Lianhua Cui
- School of Medicine, Qingdao University, Qingdao, China
| | - Xiansong Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, National Tissue Engineering Center of China, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.
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76
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Justino CI, Duarte AC, Rocha-Santos TA. Critical overview on the application of sensors and biosensors for clinical analysis. Trends Analyt Chem 2016; 85:36-60. [PMID: 32287540 PMCID: PMC7112812 DOI: 10.1016/j.trac.2016.04.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Sensors and biosensors have been increasingly used for clinical analysis due to their miniaturization and portability, allowing the construction of diagnostic devices for point-of-care testing. This paper presents an up-to-date overview and comparison of the analytical performance of sensors and biosensors recently used in clinical analysis. This includes cancer and cardiac biomarkers, hormones, biomolecules, neurotransmitters, bacteria, virus and cancer cells, along with related significant advances since 2011. Some methods of enhancing the analytical performance of sensors and biosensors through their figures of merit are also discussed.
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Affiliation(s)
- Celine I.L. Justino
- Department of Chemistry & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
- ISEIT/Viseu, Instituto Piaget, Estrada do Alto do Gaio, Galifonge, 3515-776 Lordosa, Viseu, Portugal
| | - Armando C. Duarte
- Department of Chemistry & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Teresa A.P. Rocha-Santos
- Department of Chemistry & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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77
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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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78
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Tounsi M, Ben Braiek M, Baraket A, Lee M, Zine N, Zabala M, Bausells J, Aloui F, Ben Hassine B, Maaref A, Errachid A. Electrochemical Capacitive K+EMIS Chemical Sensor Based on the Dibromoaza[7]helicene as an Ionophore for Potassium Ions Detection. ELECTROANAL 2016. [DOI: 10.1002/elan.201600104] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Moncef Tounsi
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA); Faculté des Sciences de Monastir; Université de Monastir; Tunisie
- Université de Lyon; Institut de Sciences Analytiques (ISA) - UMR 5280; 5 rue de la Doua 69100 Villeurbanne France
| | - Mourad Ben Braiek
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène; Faculté des Sciences; Université de Monastir
| | - Abdoullatif Baraket
- Université de Lyon; Institut de Sciences Analytiques (ISA) - UMR 5280; 5 rue de la Doua 69100 Villeurbanne France
| | - Michael Lee
- Université de Lyon; Institut de Sciences Analytiques (ISA) - UMR 5280; 5 rue de la Doua 69100 Villeurbanne France
| | - Nadia Zine
- Université de Lyon; Institut de Sciences Analytiques (ISA) - UMR 5280; 5 rue de la Doua 69100 Villeurbanne France
| | - Miguel Zabala
- Instituto de Microelectronica de Barcelona; IMB-CNM (CSIC); Campus UAB 08193 Bellaterra, Barcelona Spain
| | - Joan Bausells
- Instituto de Microelectronica de Barcelona; IMB-CNM (CSIC); Campus UAB 08193 Bellaterra, Barcelona Spain
| | - Faouzi Aloui
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène; Faculté des Sciences; Université de Monastir
| | - Béchir Ben Hassine
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène; Faculté des Sciences; Université de Monastir
| | - Abderrazak Maaref
- Laboratoire des Interfaces et des Matériaux Avancés (LIMA); Faculté des Sciences de Monastir; Université de Monastir; Tunisie
| | - Abdelhamid Errachid
- Université de Lyon; Institut de Sciences Analytiques (ISA) - UMR 5280; 5 rue de la Doua 69100 Villeurbanne France
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79
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Vaisocherová-Lísalová H, Víšová I, Ermini ML, Špringer T, Song XC, Mrázek J, Lamačová J, Scott Lynn N, Šedivák P, Homola J. Low-fouling surface plasmon resonance biosensor for multi-step detection of foodborne bacterial pathogens in complex food samples. Biosens Bioelectron 2016; 80:84-90. [DOI: 10.1016/j.bios.2016.01.040] [Citation(s) in RCA: 156] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 01/12/2016] [Accepted: 01/13/2016] [Indexed: 11/25/2022]
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80
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Monzó J, Insua I, Fernandez-Trillo F, Rodriguez P. Fundamentals, achievements and challenges in the electrochemical sensing of pathogens. Analyst 2016; 140:7116-28. [PMID: 26339688 DOI: 10.1039/c5an01330e] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Electrochemical sensors are powerful tools widely used in industrial, environmental and medical applications. The versatility of electrochemical methods allows for the investigation of chemical composition in real time and in situ. Electrochemical detection of specific biological molecules is a powerful means for detecting disease-related markers. In the last 10 years, highly-sensitive and specific methods have been developed to detect waterborne and foodborne pathogens. In this review, we classify the different electrochemical techniques used for the qualitative and quantitative detection of pathogens. The robustness of electrochemical methods allows for accurate detection even in heterogeneous and impure samples. We present a fundamental description of the three major electrochemical sensing methods used in the detection of pathogens and the advantages and disadvantages of each of these methods. In each section, we highlight recent breakthroughs, including the utilisation of microfluidics, immunomagnetic separation and multiplexing for the detection of multiple pathogens in a single device. We also include recent studies describing new strategies for the design of future immunosensing systems and protocols. The high sensitivity and selectivity, together with the portability and the cost-effectiveness of the instrumentation, enhances the demand for further development in the electrochemical detection of microbes.
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Affiliation(s)
- Javier Monzó
- School of Chemistry, University of Birmingham, B15 2TT, UK.
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81
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Riquelme MV, Zhao H, Srinivasaraghavan V, Pruden A, Vikesland P, Agah M. Optimizing blocking of nonspecific bacterial attachment to impedimetric biosensors. SENSING AND BIO-SENSING RESEARCH 2016. [DOI: 10.1016/j.sbsr.2016.04.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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82
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Barreiros dos Santos M, Azevedo S, Agusil JP, Prieto-Simón B, Sporer C, Torrents E, Juárez A, Teixeira V, Samitier J. Label-free ITO-based immunosensor for the detection of very low concentrations of pathogenic bacteria. Bioelectrochemistry 2016; 101:146-52. [PMID: 25460610 DOI: 10.1016/j.bioelechem.2014.09.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 09/20/2014] [Accepted: 09/21/2014] [Indexed: 01/24/2023]
Abstract
Here we describe the fabrication of a highly sensitive and label-free ITO-based impedimetric immunosensor for the detection of pathogenic bacteria Escherichia coli O157:H7. Anti-E. coli antibodies were immobilized onto ITO electrodes using a simple, robust and direct methodology. First, the covalent attachment of epoxysilane on the ITO surface was demonstrated by Atomic Force Microscopy and cyclic voltammetry. The immobilization of antibody on the epoxysilane layer was quantified by Optical Waveguide Lightmode Spectroscopy, obtaining a mass variation of 12 ng cm(− 2) (0.08 pmol cm(− 2)). Microcontact printing and fluorescence microscopy were used to demonstrate the specific binding of E. coli O157:H7 to the antibody-patterned surface. We achieved a ratio of 1:500 Salmonella typhimurium/E. coli O157:H7, thus confirming the selectivity of the antibodies and efficiency of the functionalization procedure. Finally, the detection capacity of the ITO-based immunosensor was evaluated by Electrochemical Impedance Spectroscopy. A very low limit of detection was obtained (1 CFU mL(− 1)) over a large linear working range (10–10(6) CFU mL(− 1)). The specificity of the impedimetric immunosensor was also examined. Less than 20% of non-specific bacteria (S. typhimurium and E. coli K12) was observed. Our results reveal the applicability of ITO for the development of highly sensitive and selective impedimetric immunosensors.
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83
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Henihan G, Schulze H, Corrigan DK, Giraud G, Terry JG, Hardie A, Campbell CJ, Walton AJ, Crain J, Pethig R, Templeton KE, Mount AR, Bachmann TT. Label- and amplification-free electrochemical detection of bacterial ribosomal RNA. Biosens Bioelectron 2016; 81:487-494. [PMID: 27016627 DOI: 10.1016/j.bios.2016.03.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/09/2016] [Accepted: 03/17/2016] [Indexed: 01/13/2023]
Abstract
Current approaches to molecular diagnostics rely heavily on PCR amplification and optical detection methods which have restrictions when applied to point of care (POC) applications. Herein we describe the development of a label-free and amplification-free method of pathogen detection applied to Escherichia coli which overcomes the bottleneck of complex sample preparation and has the potential to be implemented as a rapid, cost effective test suitable for point of care use. Ribosomal RNA is naturally amplified in bacterial cells, which makes it a promising target for sensitive detection without the necessity for prior in vitro amplification. Using fluorescent microarray methods with rRNA targets from a range of pathogens, an optimal probe was selected from a pool of probe candidates identified in silico. The specificity of probes was investigated on DNA microarray using fluorescently labeled 16S rRNA target. The probe yielding highest specificity performance was evaluated in terms of sensitivity and a LOD of 20 pM was achieved on fluorescent glass microarray. This probe was transferred to an EIS end point format and specificity which correlated to microarray data was demonstrated. Excellent sensitivity was facilitated by the use of uncharged PNA probes and large 16S rRNA target and investigations resulted in an LOD of 50 pM. An alternative kinetic EIS assay format was demonstrated with which rRNA could be detected in a species specific manner within 10-40min at room temperature without wash steps.
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Affiliation(s)
- Grace Henihan
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK
| | - Holger Schulze
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK
| | - Damion K Corrigan
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK; School of Chemistry, The University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, Scotland, UK
| | - Gerard Giraud
- School of Physics and Astronomy, The University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JZ, Scotland, UK
| | - Jonathan G Terry
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh EH9 3FF, Scotland, UK
| | - Alison Hardie
- Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, Scotland, UK
| | - Colin J Campbell
- School of Chemistry, The University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, Scotland, UK
| | - Anthony J Walton
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh EH9 3FF, Scotland, UK
| | - Jason Crain
- School of Physics and Astronomy, The University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JZ, Scotland, UK; National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK
| | - Ronald Pethig
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh EH9 3FF, Scotland, UK
| | - Kate E Templeton
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK; Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, Scotland, UK
| | - Andrew R Mount
- School of Chemistry, The University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, Scotland, UK
| | - Till T Bachmann
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK.
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84
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Yang Z, Liu Y, Lei C, Sun XC, Zhou Y. Ultrasensitive detection and quantification of E. coli O157:H7 using a giant magnetoimpedance sensor in an open-surface microfluidic cavity covered with an antibody-modified gold surface. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1818-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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85
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Strong Gradients in Weak Magnetic Fields Induce DOLLOP Formation in Tap Water. WATER 2016. [DOI: 10.3390/w8030079] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In 2012 Coey proposed a theory on the mechanism of magnetic water treatment based on the gradient of the applied field rather than its absolute strength. We tested this theory by measuring the effect of very weak field magnets (≤ 10 G) containing strong magnetic inhomogeneities (ΔB = 770 G·m−1 (WCM 62081992) and 740 G·m−1 (WCM 62083545)) on tap water samples by the use of electric impedance spectroscopy (EIS) and laser scattering. Our results show an increased formation of nm-sized prenucleation clusters (dynamically ordered liquid like oxyanion polymers or “DOLLOPs”) due to the exposure to the magnetic field and thus are consistent with Coey’s theory which is therefore also applicable to very weak magnetic fields as long as they contain strong gradients.
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86
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Wan J, Ai J, Zhang Y, Geng X, Gao Q, Cheng Z. Signal-off impedimetric immunosensor for the detection of Escherichia coli O157:H7. Sci Rep 2016; 6:19806. [PMID: 26796138 PMCID: PMC4726323 DOI: 10.1038/srep19806] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 12/14/2015] [Indexed: 11/23/2022] Open
Abstract
A signal-off impedimetric immune-biosensor based on gold nanoparticle (AuNP)-mediated electron transfer (ET) across a self-assembled monolayer (SAM) was the developed for highly sensitive detection of Escherichia coli O157:H7 bacteria. The biosensor was fabricated by covalently grafting an anti-Escherichia coli O157:H7 antibody onto SAM-modified gold electrodes. Following bacterial capture, the sensor was further modified by the gold nanoparticles (AuNPs). Due to the strong interaction between AuNPs and Escherichia coli O157:H7, AuNPs attached to the surface of the bacteria and acted as ET pathways across the insulating SAMs on the electrode surface, resulting in a significant reduction of the electron transfer resistance (Ret) between the [Fe(CN)6](3-/4-) redox probe in the solution and the substrate gold surface. Therefore, the attachment AuNPs to captured bacteria significantly enhanced the sensitivity for Escherichia coli O157:H7 bacteria detection.
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Affiliation(s)
- Jingzhuan Wan
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, China
| | - Junjie Ai
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, China
| | - Yonghua Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, China
| | - Xiaohui Geng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, China
| | - Qiang Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, China
| | - Zhiliang Cheng
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104, USA
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87
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Wang R, Lum J, Callaway Z, Lin J, Bottje W, Li Y. A Label-Free Impedance Immunosensor Using Screen-Printed Interdigitated Electrodes and Magnetic Nanobeads for the Detection of E. coli O157:H7. BIOSENSORS-BASEL 2015; 5:791-803. [PMID: 26694478 PMCID: PMC4697145 DOI: 10.3390/bios5040791] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/05/2015] [Accepted: 12/11/2015] [Indexed: 11/26/2022]
Abstract
Escherichia coli O157:H7 is one of the leading bacterial pathogens causing foodborne illness. In this study, an impedance immunosensor based on the use of magnetic nanobeads and screen-printed interdigitated electrodes was developed for the rapid detection of E. coli O157:H7. Magnetic nanobeads coated with anti-E. coli antibody were mixed with an E. coli sample and used to isolate and concentrate the bacterial cells. The sample was suspended in redox probe solution and placed onto a screen-printed interdigitated electrode. A magnetic field was applied to concentrate the cells on the surface of the electrode and the impedance was measured. The impedance immunosensor could detect E. coli O157:H7 at a concentration of 104.45 cfu·mL−1 (~1400 bacterial cells in the applied volume of 25 μL) in less than 1 h without pre-enrichment. A linear relationship between bacteria concentration and impedance value was obtained between 104 cfu·mL−1 and 107 cfu·mL−1. Though impedance measurement was carried out in the presence of a redox probe, analysis of the equivalent circuit model showed that the impedance change was primarily due to two elements: Double layer capacitance and resistance due to electrode surface roughness. The magnetic field and impedance were simulated using COMSOL Multiphysics software.
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Affiliation(s)
- Ronghui Wang
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA.
| | - Jacob Lum
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR 72701, USA.
| | - Zach Callaway
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA.
| | - Jianhan Lin
- College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China.
| | - Walter Bottje
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA.
| | - Yanbin Li
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA.
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, AR 72701, USA.
- Center of Excellence for Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA.
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310068, China.
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88
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Xu M, Wang R, Li Y. Rapid detection of Escherichia coli O157:H7 and Salmonella Typhimurium in foods using an electrochemical immunosensor based on screen-printed interdigitated microelectrode and immunomagnetic separation. Talanta 2015; 148:200-8. [PMID: 26653441 DOI: 10.1016/j.talanta.2015.10.082] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 10/25/2015] [Accepted: 10/26/2015] [Indexed: 10/22/2022]
Abstract
Foodborne pathogens have continuously been a serious food safety issue and there is a growing demand for a rapid and sensitive method to screen the pathogens for on-line or in-field applications. Therefore, an impedimetric immunosensor based on the use of magnetic beads (MBs) for separation and a screen-printed interdigitated microelectrode (SP-IDME) for measurement was studied for the rapid detection of Escherichia coli O157:H7 and Salmonella Typhimurium in foods. Streptavidin coated MBs were functionalized with corresponding biotinylated antibodies (Ab) to capture the target bacteria. The glucose oxidase (GOx)-Ab conjugates were employed to label the MBs-Ab-cell complexes. The yielded MBs-Ab-cell-Ab-GOx biomass was mixed with the glucose solution to trigger an enzymatic reaction which produced gluconic acid. This increased the ion strength of the solution, thus decreasing the impedance of the solution measured on the SP-IDME. Our results showed that the immunosensor was capable of specifically detecting E. coli O157:H7 and S. Typhimurium within the range of 10(2)-10(6) cfu ml(-1) in the pure culture samples. E. coli O157:H7 in ground beef and S. Typhimurium in chicken rinse water were also examined. The limits of detection (LODs) for the two bacteria in foods were 2.05×10(3) cfu g(-1) and 1.04×10(3) cfu ml(-1), respectively. This immunosensor required only a bare electrode to measure the impedance changes, and no surficial modification on the electrode was needed. It was low-cost, reproducible, easy-to-operate, and easy-to-preserve. All these merits demonstrated this immunosensor has great potential for the rapid and on-site detection of pathogenic bacteria in foods.
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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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89
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Demirkol DO, Timur S. A sandwich-type assay based on quantum dot/aptamer bioconjugates for analysis ofE. ColiO157:H7 in microtiter plate format. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2015.1074906] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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90
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Ramasamy M, Yi DK, An SSA. Enhanced detection sensitivity of Escherichia coli O157:H7 using surface-modified gold nanorods. Int J Nanomedicine 2015; 10 Spec Iss:179-90. [PMID: 26347081 PMCID: PMC4556300 DOI: 10.2147/ijn.s88379] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Escherichia coli O157:H7 (O157) is a Gram negative and highly virulent bacteria found in food and water sources, and is a leading cause of chronic diseases worldwide. Diagnosis and prevention from the infection require simple and rapid analysis methods for the detection of pathogens, including O157. Endogenous membrane peroxidase, an enzyme present on the surface of O157, was used for the colorimetric detection of bacteria by catalytic oxidation of the peroxidase substrate. In this study, we have analyzed the impact of the synthesized bare gold nanorods (AuNRs) and silica-coated AuNRs on the growth of E. coli O157. Along with the membrane peroxidase activity of O157, other bacteria strains were analyzed. Different concentrations of nanorods were used to analyze the growth responses, enzymatic changes, and morphological alterations of bacteria by measuring optical density, 3,3',5,5'-tetramethylbenzidine assay, flow cytometry analysis, and microscopy studies. The results revealed that O157 showed higher and continuous membrane peroxidase activity than other bacteria. Furthermore, O157 treated with bare AuNRs showed a decreased growth rate in comparison with the bacteria with surface modified AuNRs. Interestingly, silica-coated AuNRs favored the growth of bacteria and also increased membrane peroxidase activity. This result can be particularly important for the enzymatic analysis of surface treated AuNRs in various microbiological applicants.
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Affiliation(s)
| | - Dong Kee Yi
- Department of Chemistry, Myongji University, Yongin, Republic of Korea
- Department of Energy and Biotechnology, Myongji University, Yongin, Republic of Korea
| | - Seong Soo A An
- Department of BioNano Technology, Gachon University, Seongnam, Republic of Korea
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91
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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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92
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Magnetic molecularly imprinted polymer nanoparticles based electrochemical sensor for the measurement of Gram-negative bacterial quorum signaling molecules (N-acyl-homoserine-lactones). Biosens Bioelectron 2015; 75:411-9. [PMID: 26344904 DOI: 10.1016/j.bios.2015.07.045] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 07/19/2015] [Accepted: 07/20/2015] [Indexed: 02/08/2023]
Abstract
We have developed a novel and economical electrochemical sensor to measure Gram-negative bacterial quorum signaling molecules (AHLs) using magnetic nanoparticles and molecularly imprinted polymer (MIP) technology. Magnetic molecularly imprinted polymers (MMIPs) capable of selectively absorbing AHLs were successfully synthesized by surface polymerization. The particles were deposited onto a magnetic carbon paste electrode (MGCE) surface, and characterized by electrochemical measurements. Differential Pulse Voltammetry (DPV) was utilized to record the oxidative current signal that is characteristic of AHL. The detection limit of this assay was determined to be 8×10(-10)molL(-1) with a linear detection range of 2.5×10(-9)molL(-1) to 1.0×10(-7)molL(-1). This Fe3O4@SiO2-MIP-based electrochemical sensor is a valuable new tool that allows quantitative measurement of Gram-negative bacterial quorum signaling molecules. It has potential applications in the fields of clinical diagnosis or food analysis with real-time detection capability, high specificity, excellent reproducibility, and good stability.
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93
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Jayamohan H, Gale BK, Minson B, Lambert CJ, Gordon N, Sant HJ. Highly sensitive bacteria quantification using immunomagnetic separation and electrochemical detection of guanine-labeled secondary beads. SENSORS (BASEL, SWITZERLAND) 2015; 15:12034-52. [PMID: 26007743 PMCID: PMC4481928 DOI: 10.3390/s150512034] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 05/07/2015] [Indexed: 12/26/2022]
Abstract
In this paper, we report the ultra-sensitive indirect electrochemical detection of E. coli O157:H7 using antibody functionalized primary (magnetic) beads for capture and polyguanine (polyG) oligonucleotide functionalized secondary (polystyrene) beads as an electrochemical tag. Vacuum filtration in combination with E. coli O157:H7 specific antibody modified magnetic beads were used for extraction of E. coli O157:H7 from 100 mL samples. The magnetic bead conjugated E. coli O157:H7 cells were then attached to polyG functionalized secondary beads to form a sandwich complex (magnetic bead/E. coli secondary bead). While the use of magnetic beads for immuno-based capture is well characterized, the use of oligonucleotide functionalized secondary beads helps combine amplification and potential multiplexing into the system. The antibody functionalized secondary beads can be easily modified with a different antibody to detect other pathogens from the same sample and enable potential multiplexing. The polyGs on the secondary beads enable signal amplification up to 10⁸ guanine tags per secondary bead (7.5 x 10⁶ biotin-FITC per secondary bead, 20 guanines per oligonucleotide) bound to the target (E. coli). A single-stranded DNA probe functionalized reduced graphene oxide modified glassy carbon electrode was used to bind the polyGs on the secondary beads. Fluorescent imaging was performed to confirm the hybridization of the complex to the electrode surface. Differential pulse voltammetry (DPV) was used to quantify the amount of polyG involved in the hybridization event with tris(2,2'-bipyridine)ruthenium(II) (Ru(bpy)3(2+)) as the mediator. The amount of polyG signal can be correlated to the amount of E. coli O157:H7 in the sample. The method was able to detect concentrations of E. coli O157:H7 down to 3 CFU/100 mL, which is 67 times lower than the most sensitive technique reported in literature. The signal to noise ratio for this work was 3. We also demonstrate the use of the protocol for detection of E. coli O157:H7 seeded in waste water effluent samples.
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Affiliation(s)
- Harikrishnan Jayamohan
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA.
| | - Bruce K Gale
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA.
- Espira Inc., 825 N 300 W Suite N-223, Salt Lake City, UT 84103, USA.
| | - Bj Minson
- Espira Inc., 825 N 300 W Suite N-223, Salt Lake City, UT 84103, USA.
| | | | - Neil Gordon
- Guanine Inc., Salt Lake City, UT 84103, USA.
| | - Himanshu J Sant
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA.
- Espira Inc., 825 N 300 W Suite N-223, Salt Lake City, UT 84103, USA.
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94
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Savage AC, Buckley N, Halliwell J, Gwenin C. Botulinum neurotoxin serotypes detected by electrochemical impedance spectroscopy. Toxins (Basel) 2015; 7:1544-55. [PMID: 25954998 PMCID: PMC4448162 DOI: 10.3390/toxins7051544] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Revised: 04/26/2015] [Accepted: 04/30/2015] [Indexed: 12/29/2022] Open
Abstract
Botulinum neurotoxin is one of the deadliest biological toxins known to mankind and is able to cause the debilitating disease botulism. The rapid detection of the different serotypes of botulinum neurotoxin is essential for both diagnosis of botulism and identifying the presence of toxin in potential cases of terrorism and food contamination. The modes of action of botulinum neurotoxins are well-established in literature and differ for each serotype. The toxins are known to specifically cleave portions of the SNARE proteins SNAP-25 or VAMP; an interaction that can be monitored by electrochemical impedance spectroscopy. This study presents a SNAP-25 and a VAMP biosensors for detecting the activity of five botulinum neurotoxin serotypes (A-E) using electrochemical impedance spectroscopy. The biosensors are able to detect concentrations of toxins as low as 25 fg/mL, in a short time-frame compared with the current standard methods of detection. Both biosensors show greater specificity for their compatible serotypes compared with incompatible serotypes and denatured toxins.
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Affiliation(s)
- Alison C Savage
- School of Chemistry, Bangor University, Bangor, Gwynedd, Wales LL57 2DG, UK.
| | - Nicholas Buckley
- School of Chemistry, Bangor University, Bangor, Gwynedd, Wales LL57 2DG, UK.
| | - Jennifer Halliwell
- School of Chemistry, Bangor University, Bangor, Gwynedd, Wales LL57 2DG, UK.
| | - Christopher Gwenin
- School of Chemistry, Bangor University, Bangor, Gwynedd, Wales LL57 2DG, UK.
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95
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Tawil N, Sacher E, Mandeville R, Meunier M. Bacteriophages: biosensing tools for multi-drug resistant pathogens. Analyst 2015; 139:1224-36. [PMID: 24434867 DOI: 10.1039/c3an01989f] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Pathogen detection is of utmost importance in many sectors, such as in the food industry, environmental quality control, clinical diagnostics, bio-defence and counter-terrorism. Failure to appropriately, and specifically, detect pathogenic bacteria can lead to serious consequences, and may ultimately be lethal. Public safety, new legislation, recent outbreaks in food contamination, and the ever-increasing prevalence of multidrug-resistant infections have fostered a worldwide research effort targeting novel biosensing strategies. This review concerns phage-based analytical and biosensing methods targeted towards theranostic applications. We discuss and review phage-based assays, notably phage amplification, reporter phage, phage lysis, and bioluminescence assays for the detection of bacterial species, as well as phage-based biosensors, including optical (comprising SPR sensors and fiber optic assays), electrochemical (comprising amperometric, potentiometric, and impedimetric sensors), acoustic wave and magnetoelastic sensors.
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Affiliation(s)
- N Tawil
- Regroupement Québécois de Matériaux de Pointe, Department of Engineering Physics, École Polytechnique de Montréal, Case Postale 6079, succursale Centre-ville, Montréal, Québec H3C 3A7, Canada.
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96
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She Z, Topping K, Shamsi MH, Wang N, Chan NWC, Kraatz HB. Investigation of the Utility of Complementary Electrochemical Detection Techniques to Examine the in Vitro Affinity of Bacterial Flagellins for a Toll-Like Receptor 5 Biosensor. Anal Chem 2015; 87:4218-24. [DOI: 10.1021/ac5042439] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Zhe She
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Kristin Topping
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
| | - Mohtashim H. Shamsi
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
- Donnelly Centre
for Cellular and Biomolecular Research, University of Toronto, 160 College
Street, Toronto, Ontario M5S 3E1, Canada
| | - Nan Wang
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Nora W. C. Chan
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
- Bio-Analysis
Group, Defence Research and Development Canada—Suffield Research Centre, P.O. Box 4000, Station Main, Medicine Hat, Alberta T1A 8K6, Canada
| | - Heinz-Bernhard Kraatz
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
- Department
of Chemistry and Chemical Engineering, Royal Military College of Canada, P.O. Box
17000, Station Forces, Kingston, Ontario K7K 7B4, Canada
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97
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Göeken KL, Subramaniam V, Gill R. Enhancing spectral shifts of plasmon-coupled noble metal nanoparticles for sensing applications. Phys Chem Chem Phys 2015; 17:422-7. [DOI: 10.1039/c4cp03739a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Enhancing spectral shifts for DNA sensing by heterogeneous plasmon coupling of Ag and Au nanoparticles.
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Affiliation(s)
- Kristian L. Göeken
- Nanobiophysics
- MIRA Institute for Biomedical Technology and Technical Medicine
- University of Twente
- Enschede
- The Netherlands
| | - Vinod Subramaniam
- Nanobiophysics
- MIRA Institute for Biomedical Technology and Technical Medicine
- University of Twente
- Enschede
- The Netherlands
| | - Ron Gill
- Nanobiophysics
- MIRA Institute for Biomedical Technology and Technical Medicine
- University of Twente
- Enschede
- The Netherlands
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98
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Electrochemical impedance spectroscopy biosensor for detection of active botulinum neurotoxin. SENSING AND BIO-SENSING RESEARCH 2014. [DOI: 10.1016/j.sbsr.2014.08.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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99
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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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100
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Zhang X, Lu W, Han E, Wang S, Shen J. Hybrid Nanostructure-based Immunosensing for Electrochemical Assay of Escherichia coli as Indicator Bacteria Relevant to the Recycling of Urban Sludge. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.065] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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