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Singh AK, Dhiman TK, Lakshmi GBVS, Raj R, Jha SK, Solanki PR. Rapid and label-free detection of Aflatoxin-B1 viamicrofluidic electrochemical biosensor based on manganese (III) oxide (Mn 3O 4) synthesized by co-precipitation route at room temperature. NANOTECHNOLOGY 2022; 33:285501. [PMID: 35299158 DOI: 10.1088/1361-6528/ac5ee2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Aflatoxin B1 (AFB1) is the most toxic mycotoxin, naturally occurring in food items, and it causes several types of lethal diseases. Therefore, a rapid and convenient detection method for AFB1 is the first step toward overcoming the effect of AFB1. The current work presents the development of an efficient microfluidic electrochemical-based biosensor using tri-manganese tetroxide nanoparticles (Mn3O4nps) for AFB1 detection. The Mn3O4nps were synthesized at room temperature through the co-precipitation route. Its phase purity, structural and morphological studies have been characterized through x-ray diffraction, Raman spectroscopy, energy-dispersive x-ray, Fourier transform infrared spectroscopy and transmission electron microscopy. The mask-less UV-lithography was carried out to fabricate the three-electrode chip and microfluidic channel of the microfluidic electrochemical biosensing system. The designed microfluidic immunosensor (BSA/Ab-AFB1/Mn3O4/ITO) was fabricated using the three-electrode chip, microfluidic channel in poly-dimethyl siloxane. The fabricated sensor exhibited the 3.4μA ml ng-1cm-2sensitivity and had the lowest lower detection limit of 0.295 pg ml-1with the detection range of 1 pg ml-1to 300 ng ml-1. Additionally, the spiked study was also performed with this immunoelectrode and a recovery rate was obtained of 108.2%.
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Affiliation(s)
- Avinash Kumar Singh
- Special Centre for Nanoscience, Jawaharlal Nehru University (JNU), New Delhi-110067, India
- School of Physical Sciences, JNU, New Delhi-110067, India
| | - Tarun Kumar Dhiman
- Special Centre for Nanoscience, Jawaharlal Nehru University (JNU), New Delhi-110067, India
| | - G B V S Lakshmi
- Special Centre for Nanoscience, Jawaharlal Nehru University (JNU), New Delhi-110067, India
| | - Rishi Raj
- Indian Institute of Technology, New Delhi-110067, India
| | | | - Pratima R Solanki
- Special Centre for Nanoscience, Jawaharlal Nehru University (JNU), New Delhi-110067, India
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2
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Fattahi Z, Hasanzadeh M. Nanotechnology-assisted microfluidic systems platform for chemical and bioanalysis. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116637] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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3
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Development of Electrochemical Sensors/Biosensors to Detect Natural and Synthetic Compounds Related to Agroalimentary, Environmental and Health Systems in Argentina. A Review of the Last Decade. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9110294] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Electrochemical sensors and biosensors are analytical tools, which are in continuous development with the aim of generating new analytical devices which are more reliable, cheaper, faster, sensitive, selective, and robust than others. In matrices related to agroalimentary, environmental, or health systems, natural or synthetic compounds occur which fulfil specific roles; some of them (such as mycotoxins or herbicides) may possess harmful properties, and others (such as antioxidants) beneficial ones. This imposes a challenge to develop new tools and analytical methodologies for their detection and quantification. This review summarises different aspects related to the development of electrochemical sensors and biosensors carried out in Argentina in the last ten years for application in agroalimentary, environmental, and health fields. The discussion focuses on the construction and development of electroanalytical methodologies for the determination of mycotoxins, herbicides, and natural and synthetic antioxidants. Studies based on the use of different electrode materials modified with micro/nanostructures, functional groups, and biomolecules, complemented by the use of chemometric tools, are explored. Results of the latest reports from research groups in Argentina are presented. The main goals are highlighted.
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4
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Zhang B, Liu W, Liu Z, Fu X, Du D. Establishment of a Chemiluminescence Immunoassay Combined with Immunomagnetic Beads for Rapid Analysis Of Ochratoxin A. J AOAC Int 2021; 105:346-351. [PMID: 34599815 DOI: 10.1093/jaoacint/qsab104] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/18/2021] [Accepted: 07/26/2021] [Indexed: 11/14/2022]
Abstract
BACKGROUND Ochratoxins A (OTA), as the harmful mycotoxins, are toxic secondary metabolite produced by several species of Aspergillus and Penicillium. Hence, it is of vital important to establish a sensitive method to detect OTA in various grains. OBJECTIVE Herein a novel highly sensitive chemiluminescence immunoassay was developed to determination of ochratoxin A in wheat, corn, and poultry feed. METHODS The immunomagnetic beads were used as solid phase carrier and separator in the competitive chemiluminescence method, the monoclonal antibodies anti-OTA coated on immunomagnetic beads were applied as the capturing antibody, in which OTA would compete with Ochratoxin A-alkaline phosphatase (OTA-ALP) in binding with OTA antibodies. RESULTS The proposed method exhibited good linearity (R2 ≥ 0.999), adequate OTA recovery rate (83.60% to 102.50%), and good repeatability. The sensitivity of the proposed method was 2.05 pg/mL. In addition, the method was highly selective, it did not have cross-reaction with other mycotoxin (e.g., AFB1, DON, ZEN). Furthermore, the developed method was applied in the analysis of wheat, corn and two animal feeds successfully, the results obtained by the chemiluminescence method showed the high correlation with those obtained by HPLC method (correlation coefficient 0.9958) when testing each extract by both methods. CONCLUSIONS This strategy shows great potential application for other toxic and harmful mycotoxin detection. HIGHLIGHTS A novel highly rapid and sensitive chemiluminescence immunoassay was established to quantitation for ochratoxin A.
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Affiliation(s)
- Bo Zhang
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.,Kangyuan Techbio Biological Technology Co., Ltd, Suqian, 223600, China
| | - Wenting Liu
- College of Pharmacy, Nankai University, Tianjin, 300350, China
| | - Zhenjiang Liu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Xiaoling Fu
- The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Daolin Du
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China
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Sharma S, Bhatia V. Magnetic nanoparticles in microfluidics-based diagnostics: an appraisal. Nanomedicine (Lond) 2021; 16:1329-1342. [PMID: 34027677 DOI: 10.2217/nnm-2021-0007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The use of magnetic nanoparticles (MNPs) in microfluidics based diagnostics is a classic case of micro-, nano- and bio-technology coming together to design extremely controllable, reproducible, and scalable nano and micro 'on-chip bio sensing systems.' In this review, applications of MNPs in microfluidics ranging from molecular diagnostics and immunodiagnostics to clinical uses have been examined. In addition, microfluidic mixing and capture of analytes using MNPs, and MNPs as carriers in microfluidic devices has been investigated. Finally, the challenges and future directions of this upcoming field have been summarized. The use of MNP-based microfluidic devices, will help in developing decentralized or 'point of care' testing globally, contributing to affordable healthcare, particularly, for middle- and low-income developing countries.
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Affiliation(s)
- Smriti Sharma
- Department of Chemistry, Miranda House, University of Delhi, India
| | - Vinayak Bhatia
- ICARE Eye Hospital & Postgraduate Institute, Noida, U.P., India
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Zhao H, Qiao X, Zhang X, Niu C, Yue T, Sheng Q. Simultaneous electrochemical aptasensing of patulin and ochratoxin A in apple juice based on gold nanoparticles decorated black phosphorus nanomaterial. Anal Bioanal Chem 2021; 413:3131-3140. [PMID: 33715040 DOI: 10.1007/s00216-021-03253-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 11/30/2022]
Abstract
Simultaneous detection of patulin (PAT) and ochratoxin A (OTA) in food products is in great demand, which can prevent toxins from being exposed to human and animal bodies. However, simultaneous detection of multiple targets still faces a challenge. Herein, we developed a novel electrochemical aptasensor for the simultaneous detection of PAT and OTA in apple juice based on gold nanoparticles decorated black phosphorus (AuNPs-BP) nanomaterial. AuNPs-BP function?/work? as a sensing platform for loading much different electrochemical signal molecules functionalized aptamers. In this context, methylene blue functionalized PAT aptamers (Mb-PAT-aptamers) and ferrocene functionalized OTA aptamers (Fc-OTA-aptamers) have been introduced here to fabricate the aptasensor. Fc close to electrode surface showed a strong signal, whereas Mb was far away from electrode surface so exhibited a weak signal in the absence of OTA and PAT. Two kinds of electrochemical signal changes have been recorded dependent on target of OTA and PAT concentrations. So, simultaneous detection of OTA and PAT is achieved. Under the optimum conditions, using this developed biosensor, PAT and OTA can be quantified at a linearity range of 0.01 × 10-7 μg·mL-1 ~ 0.10 μg·mL-1. In addition, it also has good selectivity, stability and repeatability. For the practical application, it shows promising performance for the simultaneous detection of PAT and OTA in apple juice.
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Affiliation(s)
- Haiyan Zhao
- College of Chemistry & Materials Science/Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education/Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an, 710069, Shaanxi, China
| | - Xiujuan Qiao
- College of Chemistry & Materials Science/Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education/Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an, 710069, Shaanxi, China
| | - Xuelian Zhang
- College of Food Science and Technology, Northwest University, Xi'an, 710069, Shaanxi, China
| | - Chen Niu
- College of Food Science and Technology, Northwest University, Xi'an, 710069, Shaanxi, China
| | - Tianli Yue
- College of Food Science and Technology, Northwest University, Xi'an, 710069, Shaanxi, China.
| | - Qinglin Sheng
- College of Food Science and Technology, Northwest University, Xi'an, 710069, Shaanxi, China.
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Feng J, Qian Y, Cheng Q, Ma Y, Wu D, Ma H, Ren X, Wang X, Wei Q. A signal amplification of p DNA@Ag 2S based photoelectrochemical competitive sensor for the sensitive detection of OTA in microfluidic devices. Biosens Bioelectron 2020; 168:112503. [PMID: 32866723 DOI: 10.1016/j.bios.2020.112503] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/24/2020] [Accepted: 08/06/2020] [Indexed: 01/15/2023]
Abstract
In this work, a signal amplification competitive-type photoelectrochemical system comprised of bismuth sulfide/bismuth oxyiodide/zinc oxide (Bi2S3/BiOI/ZnO) nano-array as platform and Ag2S-modified aptamers probe DNA (p DNA@Ag2S) as competition content for rapid and sensitive detection of OTA in microfluidic devices. The BiOI nano-array was first growth on surfaces of ZnO by a simple electrodeposited method, which provided large specific surface area and high stability to solve distribution of sensing platform and loose of combination of sensing substrate. Then, the Bi2S3 could be in-situ growth by self-sacrificial part Bi3+ of BiOI to form heterojunction without destroying the structure of the nano-array. A strong photocurrent intensity was acquired by the Bi2S3/BiOI/ZnO modified onto indium tin oxide (ITO) electrode, due to its good matching cascade band-edge levels could improve efficient separation of photo-generated e-/h+ pairs. After immobilizing with the capture DNA (c DNA) and the sequential hybridization of p DNA@Ag2S, the photocurrent intensity reduced obviously because part photo-generated electron transformed to Ag2S rather than Bi2S3/BiOI/ZnO electrode. Subsequently, the photocurrent intensity increased evident when immobilized the target OTA, owing to the OTA could bind the p DNA@Ag2S to form the specific-complex that were released from the electrode surface. Under optimal conditions, the prepared PEC microfluidic sensor exhibited a linear concentration of OTA from 0.01 pg/mL to 200 ng/mL with a low detection limit of 0.0035 pg/mL (S/N = 3). Furthermore, it achieved high sensitivity, good specificity, and acceptable stability and further provided an efficient method for sensitive detection of other target mycotoxins in practical application.
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Affiliation(s)
- Jinhui Feng
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Yanrong Qian
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Qian Cheng
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Yingming Ma
- Center for Advanced Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China
| | - Dan Wu
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Hongmin Ma
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Xiang Ren
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Xueying Wang
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
| | - Qin Wei
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
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Ramadan MM, Mohamed MA, Almoammar H, Abd-Elsalam KA. Magnetic nanomaterials for purification, detection, and control of mycotoxins. NANOMYCOTOXICOLOGY 2020:87-114. [DOI: 10.1016/b978-0-12-817998-7.00005-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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9
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Abstract
Immunosensors are compact tools on which antibody and antigen interactions are formed. The specific interaction between antibody and antigen is detected by using a transducer and an electrical signal is measured. This specific interaction between these molecules makes immunosensor very attractive for several applications in different fields. Electrochemical immunosensors are successful devices in selective and sensitive detection of several analytes. Electrochemical transducing methods such as voltammetric, potentiometric, conductometric or impedimetric have been utilized in different applications due to their excellent properties such as being low-cost, sensitivity and simplicity. In this chapter, the fundamentals of electrochemical immunosensors are summarized and different applications in food, environmental and clinical analyses are investigated and discussed.
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Affiliation(s)
- Elif Burcu Aydin
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey.
| | - Muhammet Aydin
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey
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10
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Felix FS, Baccaro ALB, Angnes L. Disposable Voltammetric Immunosensors Integrated with Microfluidic Platforms for Biomedical, Agricultural and Food Analyses: A Review. SENSORS 2018; 18:s18124124. [PMID: 30477240 PMCID: PMC6308430 DOI: 10.3390/s18124124] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/15/2018] [Accepted: 11/21/2018] [Indexed: 12/19/2022]
Abstract
Disposable immunosensors are analytical devices used for the quantification of a broad variety of analytes in different areas such as clinical, environmental, agricultural and food quality management. They detect the analytes by means of the strong interactions between antibodies and antigens, which provide concentration-dependent signals. For the herein highlighted voltammetric immunosensors, the analytical measurements are due to changes in the electrical signals on the surface of the transducers. The possibility of using disposable and miniaturized immunoassays is a very interesting alternative for voltammetric analyses, mainly, when associated with screen-printing technologies (screen-printed electrodes, SPEs), and microfluidic platforms. The aim of this paper is to discuss a carefully selected literature about different examples of SPEs-based immunosensors associated with microfluidic technologies for diseases, food, agricultural and environmental analysis. Technological aspects of the development of the voltammetric immunoassays such as the signal amplification, construction of paper-based microfluidic platforms and the utilization of microfluidic devices for point-of-care testing will be presented as well.
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Affiliation(s)
- Fabiana S Felix
- Departamento de Química, Universidade Federal de Lavras (UFLA), CP 3037, Lavras, CEP 37200-000 MG, Brazil.
| | - Alexandre L B Baccaro
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil.
| | - Lúcio Angnes
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil.
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Ren X, Lu P, Feng R, Zhang T, Zhang Y, Wu D, Wei Q. An ITO-based point-of-care colorimetric immunosensor for ochratoxin A detection. Talanta 2018; 188:593-599. [DOI: 10.1016/j.talanta.2018.06.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/24/2018] [Accepted: 06/01/2018] [Indexed: 12/16/2022]
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12
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Sultana A, Sazawa K, Okazaki T, Islam MS, Hata N, Sugawara K, Kuramitz H. Adsorptive Voltammetry for the Determination of Ochratoxin A Using Enrichment Effect by Cationic Surfactants. ELECTROANAL 2018. [DOI: 10.1002/elan.201800226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ayesha Sultana
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research; University of Toyama; Gofuku 3190 Toyama 930-8555 Japan
| | - Kazuto Sazawa
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research; University of Toyama; Gofuku 3190 Toyama 930-8555 Japan
| | - Takuya Okazaki
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research; University of Toyama; Gofuku 3190 Toyama 930-8555 Japan
| | - Md. Saiful Islam
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research; University of Toyama; Gofuku 3190 Toyama 930-8555 Japan
| | - Noriko Hata
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research; University of Toyama; Gofuku 3190 Toyama 930-8555 Japan
| | | | - Hideki Kuramitz
- Department of Environmental Biology and Chemistry, Graduate School of Science and Engineering for Research; University of Toyama; Gofuku 3190 Toyama 930-8555 Japan
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13
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Jiang C, Lan L, Yao Y, Zhao F, Ping J. Recent progress in application of nanomaterial-enabled biosensors for ochratoxin A detection. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.02.007] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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14
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Man Y, Liang G, Li A, Pan L. Recent Advances in Mycotoxin Determination for Food Monitoring via Microchip. Toxins (Basel) 2017; 9:E324. [PMID: 29036884 PMCID: PMC5666371 DOI: 10.3390/toxins9100324] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 09/30/2017] [Accepted: 10/09/2017] [Indexed: 11/28/2022] Open
Abstract
Mycotoxins are one of the main factors impacting food safety. Mycotoxin contamination has threatened the health of humans and animals. Conventional methods for the detection of mycotoxins are gas chromatography (GC) or liquid chromatography (LC) coupled with mass spectrometry (MS), or enzyme-linked immunosorbent assay (ELISA). However, all these methods are time-consuming, require large-scale instruments and skilled technicians, and consume large amounts of hazardous regents and solvents. Interestingly, a microchip requires less sample consumption and short analysis time, and can realize the integration, miniaturization, and high-throughput detection of the samples. Hence, the application of a microchip for the detection of mycotoxins can make up for the deficiency of the conventional detection methods. This review focuses on the application of a microchip to detect mycotoxins in foods. The toxicities of mycotoxins and the materials of the microchip are firstly summarized in turn. Then the application of a microchip that integrates various kinds of detection methods (optical, electrochemical, photo-electrochemical, and label-free detection) to detect mycotoxins is reviewed in detail. Finally, challenges and future research directions in the development of a microchip to detect mycotoxins are previewed.
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Affiliation(s)
- Yan Man
- Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products, Ministry of Agriculture of the People's Republic of China, Beijing 100125, China.
- Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China.
| | - Gang Liang
- Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products, Ministry of Agriculture of the People's Republic of China, Beijing 100125, China.
- Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China.
| | - An Li
- Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products, Ministry of Agriculture of the People's Republic of China, Beijing 100125, China.
- Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China.
| | - Ligang Pan
- Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products, Ministry of Agriculture of the People's Republic of China, Beijing 100125, China.
- Beijing Municipal Key Laboratory of Agriculture Environment Monitoring, Beijing 100097, China.
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15
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Electrochemical Biosensors for the Determination of Toxic Substances Related to Food Safety Developed in South America: Mycotoxins and Herbicides. CHEMOSENSORS 2017. [DOI: 10.3390/chemosensors5030023] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Fungal Nanotechnology: A Pandora to Agricultural Science and Engineering. Fungal Biol 2017. [DOI: 10.1007/978-3-319-68424-6_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Sutarlie L, Ow SY, Su X. Nanomaterials-based biosensors for detection of microorganisms and microbial toxins. Biotechnol J 2016; 12. [PMID: 27787955 DOI: 10.1002/biot.201500459] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 09/22/2016] [Accepted: 09/23/2016] [Indexed: 01/13/2023]
Abstract
Detection of microorganisms and microbial toxins is important for health and safety. Due to their unique physical and chemical properties, nanomaterials have been extensively used to develop biosensors for rapid detection of microorganisms with microbial cells and toxins as target analytes. In this paper, the design principles of nanomaterials-based biosensors for four selected analyte categories (bacteria cells, toxins, mycotoxins, and protozoa cells), closely associated with the target analytes' properties is reviewed. Five signal transducing methods that are less equipment intensive (colorimetric, fluorimetric, surface enhanced Raman scattering, electrochemical, and magnetic relaxometry methods) is described and compared for their sensory performance (in term oflimit of detection, dynamic range, and response time) for all analyte categories. In the end, the suitability of these five sensing principles for on-site or field applications is discussed. With a comprehensive coverage of nanomaterials, design principles, sensing principles, and assessment on the sensory performance and suitability for on-site application, this review offers valuable insight and perspective for designing suitable nanomaterials-based microorganism biosensors for a given application.
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Affiliation(s)
- Laura Sutarlie
- Insitute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), Innovis, Singapore
| | - Sian Yang Ow
- Insitute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), Innovis, Singapore
| | - Xiaodi Su
- Insitute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), Innovis, Singapore.,Department of Chemistry, National University of Singapore, Singapore
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Mycotoxin Determination in Foods Using Advanced Sensors Based on Antibodies or Aptamers. Toxins (Basel) 2016; 8:toxins8080239. [PMID: 27529281 PMCID: PMC4999855 DOI: 10.3390/toxins8080239] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 07/08/2016] [Accepted: 07/08/2016] [Indexed: 12/24/2022] Open
Abstract
Mycotoxin contamination threatens health and life of humans and animals throughout the food supply chains. Many of the mycotoxins have been proven to be carcinogens, teratogens and mutagens. The reliable and sensitive sensing methods are requested to monitor mycotoxin contamination. Advanced sensors based on antibodies or aptamers boast the advantages of high sensitivity and rapidity, and have been used in the mycotoxin sensing. These sensors are miniaturized, thereby lowering costs, and are applicable to high-throughput modes. In this work, the latest developments in sensing strategies for mycotoxin determination were critically discussed. Optical and electrochemical sensing modes were compared. The sensing methods for single mycotoxin or multiple mycotoxins in food samples were reviewed, along with the challenges and the future of antibody or aptamer-based sensors. This work might promote academic studies and industrial applications for mycotoxin sensing.
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19
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Catanante G, Rhouati A, Hayat A, Marty JL. An Overview of Recent Electrochemical Immunosensing Strategies for Mycotoxins Detection. ELECTROANAL 2016. [DOI: 10.1002/elan.201600181] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Gaelle Catanante
- BAE: Biocapteurs-Analyses-Environnement; Universite de Perpignan Via Domitia; 52 Avenue Paul Alduy Perpignan Cedex 66860 France
| | - Amina Rhouati
- BAE: Biocapteurs-Analyses-Environnement; Universite de Perpignan Via Domitia; 52 Avenue Paul Alduy Perpignan Cedex 66860 France
- Ecole Nationale Supérieure de Biotechnologie; Constantine-Algérie
| | - Akhtar Hayat
- Interdisciplinary Research centre in Biomedical Materials (IRCBM); COMSATS Institute of Information technology; Lahore Pakistan
| | - Jean Louis Marty
- BAE: Biocapteurs-Analyses-Environnement; Universite de Perpignan Via Domitia; 52 Avenue Paul Alduy Perpignan Cedex 66860 France
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Food Microfluidics Biosensors. BIOSENSORS FOR SUSTAINABLE FOOD - NEW OPPORTUNITIES AND TECHNICAL CHALLENGES 2016. [DOI: 10.1016/bs.coac.2016.04.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Emerging Nanomaterials for Analytical Detection. BIOSENSORS FOR SUSTAINABLE FOOD - NEW OPPORTUNITIES AND TECHNICAL CHALLENGES 2016. [DOI: 10.1016/bs.coac.2016.03.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Rai M, Jogee PS, Ingle AP. Emerging nanotechnology for detection of mycotoxins in food and feed. Int J Food Sci Nutr 2015; 66:363-70. [DOI: 10.3109/09637486.2015.1034251] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Wei Y, Zhang J, Wang X, Duan Y. Amplified fluorescent aptasensor through catalytic recycling for highly sensitive detection of ochratoxin A. Biosens Bioelectron 2014; 65:16-22. [PMID: 25461133 DOI: 10.1016/j.bios.2014.09.100] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 09/01/2014] [Accepted: 09/23/2014] [Indexed: 12/31/2022]
Abstract
This paper describes a novel approach utilizing nano-graphite-aptamer hybrid and DNase I for the amplified detection of ochratoxin A (OTA) for the first time. Nano-graphite can effectively quench the fluorescence of carboxyfluorescein (FAM) labeled OTA specific aptamer due to their strong π-π; stacking interactions; while upon OTA addition, it will bind with aptamer to fold into an OTA-aptamerG-quadruplex structure, which does not adsorb on the surface of nano-graphite and thus retains the dye fluorescence. Meanwhile, the G-quadruplex structure can be cleaved by DNase I, and in such case OTA is delivered from the complex. The released OTA then binds other FAM-labeled aptamers on the nano-graphite surface, and touches off another target recycling, resulting in the successive release of dye-labeled aptamers from the nano-graphite, which leads to significant amplification of the signal. Under the optimized conditions, the present amplified sensing system exhibits high sensitivity toward OTA with a limit of detection of 20nM (practical measurement), which is about 100-fold higher than that of traditional unamplified homogeneous assay. Our developed method also showed high selectivity against other interference molecules and can be applied for the detection of OTA in real red wine samples. The proposed assay is simple, cost-effective, and might open a door for the development of new assays for other biomolecules. This aptasensor is of great practical importance in food safety and could be widely extended to the detection of other toxins by replacing the sequence of the recognition aptamer.
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Affiliation(s)
- Yin Wei
- Research Center of Analytical Instrumentation, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Ji Zhang
- Research Center of Analytical Instrumentation, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Xu Wang
- Research Center of Analytical Instrumentation, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Yixiang Duan
- Research Center of Analytical Instrumentation, College of Life Science, Sichuan University, Chengdu, China.
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Kalia A, Parshad VR. Novel Trends to Revolutionize Preservation and Packaging of Fruits/Fruit Products: Microbiological and Nanotechnological Perspectives. Crit Rev Food Sci Nutr 2014; 55:159-82. [DOI: 10.1080/10408398.2011.649315] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Sierra-Rodero M, Fernández-Romero JM, Gómez-Hens A. Strategies to improve the analytical features of microfluidic methods using nanomaterials. Trends Analyt Chem 2014. [DOI: 10.1016/j.trac.2014.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lv Z, Chen A, Liu J, Guan Z, Zhou Y, Xu S, Yang S, Li C. A simple and sensitive approach for ochratoxin A detection using a label-free fluorescent aptasensor. PLoS One 2014; 9:e85968. [PMID: 24465818 PMCID: PMC3897567 DOI: 10.1371/journal.pone.0085968] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 12/09/2013] [Indexed: 11/19/2022] Open
Abstract
Ochratoxin A(OTA) is found to be one of the predominant contaminating mycotoxins in a wide variety of food commodities. To avoid the risk of OTA consumption, the detection and quantitation of OTA level are of great significance. Based on the fact that ssDNA aptamer has the ability to form a double-strand structure with its complementary sequence, a simple and rapid aptamer-based label-free approach for highly sensitive and selective fluorescence detection of OTA was developed by using ultra-sensitive double-strand DNA specific dyes PicoGreen. The results showed that as low as 1 ng/mL of OTA could be detected with a dynamic range of more than 5 orders of magnitude which satisfies the requirements for OTA maximum residue limit in various food regulated by European Commission. With the specificity of aptamer, the assay exhibited high selectivity for OTA against two other analogues (N-acetyl-l-phenylalanine and zearalenone). We also tested the aptasensor practicability using real sample of 1% beer spiked with a series of concentration of OTA and the results show good tolerance to matrix effect. All detections could be achieved in less than 30 min, which provides a simple, quick and sensitive detection method for OTA screening in food safety and could be easily extend to other small molecular chemical compounds detection which aptamer has been selected.
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Affiliation(s)
- Zhenzhen Lv
- College of Food Science, Sichuan Agricultural University, Ya'an, China
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Ailiang Chen
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
- * E-mail: (AC); (CL)
| | - Jinchuan Liu
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Zheng Guan
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Yu Zhou
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Siyuan Xu
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Shuming Yang
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Cheng Li
- College of Food Science, Sichuan Agricultural University, Ya'an, China
- * E-mail: (AC); (CL)
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Regiart M, Pereira SV, Spotorno VG, Bertolino FA, Raba J. Food safety control of zeranol through voltammetric immunosensing on Au–Pt bimetallic nanoparticle surfaces. Analyst 2014; 139:4702-9. [DOI: 10.1039/c4an00686k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study reports an accurate and sensitive strategy for zeranol (ZER) determination in bovine urine samples.
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Affiliation(s)
- Matías Regiart
- Instituto de Química San Luis (INQUISAL) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) – Universidad Nacional de San Luis (UNSL)
- San Luis, Argentina
| | - Sirley V. Pereira
- Instituto de Química San Luis (INQUISAL) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) – Universidad Nacional de San Luis (UNSL)
- San Luis, Argentina
| | - Viviana G. Spotorno
- Instituto de Recursos Biológicos, IRB
- CIRN
- Instituto Nacional de Tecnología Agropecuaria (INTA)
- C.C. 77 Morón B1708WAB, Argentina
| | - Franco A. Bertolino
- Instituto de Química San Luis (INQUISAL) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) – Universidad Nacional de San Luis (UNSL)
- San Luis, Argentina
| | - Julio Raba
- Instituto de Química San Luis (INQUISAL) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) – Universidad Nacional de San Luis (UNSL)
- San Luis, Argentina
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Li W, Powers S, Dai S. Using commercial immunoassay kits for mycotoxins: ‘joys and sorrows’? WORLD MYCOTOXIN J 2014. [DOI: 10.3920/wmj2014.1715] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Rapid test methods are widely used for measuring mycotoxins in a variety of matrices. This review presents an overview of the current commercially available immunoassay rapid test formats. Enzyme linked immune-sorbent assay (ELISA), lateral flow tests, flow through immunoassay, fluorescent polarisation immunoassay, and immunoaffinity columns coupled with fluorometric assay are common formats in the current market. The two existing evaluation programs for commercial testing kits by United State Department of Agricultural Grain Inspection, Packers & Stockyards Administration (USDA-GIPSA) and AOAC Research Institute are introduced. The strengths and weaknesses of these test kits are discussed with regard to the application scope, variance, specificity and cross reactivity, accuracy and precision, and measurement range. Generally speaking, the current commercially available testing kits meet research and industrial needs as ‘fit-for-purpose’. Furthermore, quality assurance concerns and future perspectives are elaborated for broader application of commercial test kits in research, industry and regulatory applications. It is expected that new commercial kits based on advanced technologies such as electrochemical affinity biosensors, molecularly imprinted polymers, surface plasmon resonance, fluorescence resonance energy transfer, aptamer-based biosensors and dynamic light scattering might be available to users in the future. Meanwhile, harmonisation of testing kit evaluation, incorporation of more quality assurance into the testing kit utilisation scheme, and a larger variety of kits available at lower cost will expand the usage of testing kits for food safety testing worldwide.
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Affiliation(s)
- Wei Li
- Office of the Texas State Chemist, Texas A&M University, 445 Agronomy Road, College Station, TX 77843, USA
| | - S. Powers
- VICAM, 34 Maple Street, Milford, MA 02157, USA
| | - S.Y. Dai
- Department of Veterinary Pathobiology, Texas A&M University, College Station, 77843, USA
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Tekin HC, Gijs MAM. Ultrasensitive protein detection: a case for microfluidic magnetic bead-based assays. LAB ON A CHIP 2013; 13:4711-39. [PMID: 24145920 DOI: 10.1039/c3lc50477h] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
We review the use of magnetic micro- and nanoparticles ('magnetic beads') in microfluidic systems for ultrasensitive protein detection. During recent years magnetic beads have been used frequently in immunoassays, either as mobile substrates on which the target antigen is captured, as detection labels, or simultaneously as substrates and labels. The major part of the reviewed work has as application the detection of antibodies or disease biomarkers in serum or of biotoxins from food samples. Several of the most sensitive assays allow protein detection down to fg mL(-1) concentrations. We benchmark the performance of these microfluidic magnetic bead-based assays with the most promising earlier work and with alternative solutions.
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Affiliation(s)
- H Cumhur Tekin
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015, Lausanne, Switzerland.
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Electrochemical affinity biosensors for detection of mycotoxins: A review. Biosens Bioelectron 2013; 49:146-58. [PMID: 23743326 DOI: 10.1016/j.bios.2013.05.008] [Citation(s) in RCA: 195] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 04/26/2013] [Accepted: 05/02/2013] [Indexed: 11/22/2022]
Abstract
This review discusses the current state of electrochemical biosensors in the determination of mycotoxins in foods. Mycotoxins are highly toxic secondary metabolites produced by molds. The acute toxicity of these results in serious human and animal health problems, although it has been only since early 1960s when the first studied aflatoxins were found to be carcinogenic. Mycotoxins affect a broad range of agricultural products, most important cereals and cereal-based foods. A majority of countries, mentioning especially the European Union, have established preventive programs to control contamination and strict laws of the permitted levels in foods. Official methods of analysis of mycotoxins normally requires sophisticated instrumentation, e.g. liquid chromatography with fluorescence or mass detectors, combined with extraction procedures for sample preparation. For about sixteen years, the use of simpler and faster analytical procedures based on affinity biosensors has emerged in scientific literature as a very promising alternative, particularly electrochemical (i.e., amperometric, impedance, potentiometric or conductimetric) affinity biosensors due to their simplicity and sensitivity. Typically, electrochemical biosensors for mycotoxins use specific antibodies or aptamers as affinity ligands, although recombinant antibodies, artificial receptors and molecular imprinted polymers show potential utility. This article deals with recent advances in electrochemical affinity biosensors for mycotoxins and covers complete literature from the first reports about sixteen years ago.
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Ultra sensitive microfluidic immunosensor for determination of clenbuterol in bovine hair samples using electrodeposited gold nanoparticles and magnetic micro particles as bio-affinity platform. Biosens Bioelectron 2013; 41:211-7. [DOI: 10.1016/j.bios.2012.08.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 07/27/2012] [Accepted: 08/08/2012] [Indexed: 12/25/2022]
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Hayat A, Paniel N, Rhouati A, Marty JL, Barthelmebs L. Recent advances in ochratoxin A-producing fungi detection based on PCR methods and ochratoxin A analysis in food matrices. Food Control 2012. [DOI: 10.1016/j.foodcont.2012.01.060] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Hun X, Liu F, Mei Z, Ma L, Wang Z, Luo X. Signal amplified strategy based on target-induced strand release coupling cleavage of nicking endonuclease for the ultrasensitive detection of ochratoxin A. Biosens Bioelectron 2012; 39:145-51. [PMID: 22938841 DOI: 10.1016/j.bios.2012.07.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 06/29/2012] [Accepted: 07/07/2012] [Indexed: 11/19/2022]
Abstract
In this work, a new signal amplified strategy based on target-induced strand release coupling cleavage of nicking endonuclease for the ultrasensitive detection of ochratoxin A (OTA) is reported. OTA aptamer (DNA1) and OTA aptamer complementary (DNA2) were immobilized onto a magnetic bead (MB). In the presence of OTA, DNA2 was dissociated and released from the MB. The released DNA2 then hybridized with DNA3, which was linked at the 5' terminus of the amplification template and can extend along the template in the presence of Phi 29 DNA polymerase. The formed double-stranded DNA was cleaved by nicking endonuclease Nb.BbvCI and produced a short single-stranded DNA. The cleaved DNA strand generated a new site by Phi 29 DNA polymerase and the process of extension and cleavage was cyclical. Thus, a amount of the short single-stranded DNA were produced. Using DNA and ABEI labeled carboxylic silica nanoparticles chemiluminescence (CL) probe, the short single-stranded DNA could be sensitively detected. The CL intensity (ΔI) versus the concentration of OTA was linear in the range from 1.0×10(-12) to 5.0×10(-8)g mL(-1). The detection limit was 3.0×10(-13)g mL(-1), and the RSD was 3.4% at 1.0×10(-10)g mL(-1) (n=7). The developed method has been applied to detect OTA in naturally contaminated wheat samples. Due to its simplicity, sensitivity and no need of specific recognition of aptamer for cleavage, this CL bioassay offers a promising approach for the detection of OTA and other biomolecules.
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Affiliation(s)
- Xu Hun
- Shandong Provincial Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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An electrochemical immunosensor for ochratoxin A determination in wines based on a monoclonal antibody and paramagnetic microbeads. Anal Bioanal Chem 2012; 403:1585-93. [DOI: 10.1007/s00216-012-5951-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 03/13/2012] [Accepted: 03/14/2012] [Indexed: 11/26/2022]
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