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Zheng X, Zhao Y, Zhang Y, Zhu Y, Zhang J, Xu D, Yang H, Zhou Y. Alkaline phosphatase triggered gold nanoclusters turn-on fluorescence immunoassay for detection of Ochratoxin A. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123317. [PMID: 37688875 DOI: 10.1016/j.saa.2023.123317] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/11/2023]
Abstract
Ochratoxin A (OTA) is a highly toxic mycotoxin which can cause a variety of diseases. Sensitive detection of OTA is significant for food safety. Herein, a feasible and sensitive immunoassay was established for OTA detection by alkaline phosphatase (ALP) triggered gold nanoclusters (AuNCs) turn-on fluorescence. The fluorescence of the AuNCs can be quenched by Cr6+ induced aggregation of AuNCs and the fluorescence resonance energy transfer (FRET) between AuNCs and Cr6+. Under the catalytic action of ALP-labelled IgG (IgG-ALP), the ascorbic acid 2-phosphate (AA2P) was hydrolyzed to ascorbic acid (AA) for the reducing of Cr6+ to Cr3+. As a result, the degrees of AuNCs aggregation and FRET were weakened and the fluorescence of AuNCs was turned on. The amount of OTA in the sample was negatively correlated with the amount of IgG-ALP captured by anti-OTA monoclonal antibody (McAb) in the microplate. In optimal conditions, the turn-on fluorescence immunoassay had a good linear range of 6.25-100 ng/mL, and the detection limit was 0.693 ng/mL. The recoveries of OTA from corn were 95.89%-101.08% for the fluorescence immunoassay. This work provided a feasible, sensitive and good selectivity fluorescence method for OTA detection.
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Affiliation(s)
- Xiaolong Zheng
- College of Animal Science and Technology, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China
| | - Yanan Zhao
- College of Animal Science and Technology, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China
| | - Yan Zhang
- College of Life Science, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China
| | - Yuanhua Zhu
- College of Animal Science and Technology, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China
| | - Junxiang Zhang
- College of Life Science, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China
| | - Die Xu
- College of Life Science, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China
| | - Hualin Yang
- College of Animal Science and Technology, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China; College of Life Science, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China.
| | - Yu Zhou
- College of Animal Science and Technology, Yangtze University, 266 Jingmi Road, Jingzhou, Hubei, 434025, China.
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Fan YY, Wen J, Li J, Yang XW, Zhang L, Zhang ZQ. Structure-switching aptasensors for sensitive detection of ochratoxin A. LUMINESCENCE 2023; 38:1678-1685. [PMID: 37455261 DOI: 10.1002/bio.4556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 06/27/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Ochratoxin A (OTA) is a toxic metabolite commonly found in various foods and feedstuffs. Accurate and sensitive detection of OTA is needed for food safety and human health. Based on a common OTA-binding aptamer (OTABA), two structure-switching OTABAs, namely OTABA4 and OTABA3, were designed by configuring a split G-quadruplex and a split G-triplex, respectively, at the two ends of OTABA to construct aptasensors for the detection of OTA. The OTABA, G-quadruplex, and G-triplex all can capture the thioflavin T (ThT) probe, thereby enhancing the fluorescence intensity of ThT. Bonding with OTA could change the conformations of OTABA and G-quadruplex or G-triplex regions, resulting in the release of the captured ThT and diminution of its fluorescence intensity. Dual conformation changes in structure-switching OTABA synergistically amplified the fluorescence signal and improved the sensitivity of the aptasensor, especially for that with OTABA3. The detection limits of the OTABA4-ThT and OTABA3-ThT systems for OTA were 0.28 and 0.059 ng ml-1 , with a 1.4-fold and 6.7-fold higher sensitivity than that of the original OTABA-ThT system, respectively. They performed well in corn and peanut samples and met the requirements of the food safety inspections.
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Affiliation(s)
- Yao-Yao Fan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Jie Wen
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Jun Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Xiao-Wen Yang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Lu Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China
| | - Zhi-Qi Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China
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3
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A fluorescence immunosensor for ochratoxin A based on resonance energy transfer between fluorescein derivative and gold nanoparticles. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Kim TH, Bong JH, Kim HR, Shim WB, Kang MJ, Pyun JC. One-step immunoassay based on switching peptides for analyzing ochratoxin A in wines. J Anal Sci Technol 2022. [DOI: 10.1186/s40543-022-00352-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractA one-step immunoassay is presented for the detection of ochratoxin A (OTA) using an antibody complex with switching peptides. Because the switching peptides (fluorescence-labeled) were able to bind the frame region of antibodies (IgGs), they were dissociated from antibodies immediately when target analytes were bound to the binding pockets of antibodies. From the fluorescence signal measurements of switching peptides, a quantitative analysis of target analytes, via a one-step immunoassay without any washing steps, could be performed. As the first step, the binding constant (KD) of OTA to the antibodies was estimated under the continuous flow conditions of a surface plasmon resonance biosensor. Then, the optimal switching peptide, among four types of switching peptides, and the reaction condition for complex formation with the switching peptide were determined for the one-step immunoassay for OTA analysis. Additionally, the selectivity test of one-step immunoassay for OTA was carried out in comparison with phenylalanine and zearalenone. For the application to the one-step immunoassay to detect OTA in wines, two types of sample pre-treatment methods were compared: (1) a liquid extraction was carried out using chloroform as a solvent with subsequent resuspension in phosphate-buffered saline (total analysis time < 1 h); (2) direct dilution of the wine sample (total analysis time < 0.5 h). Finally, the direct dilution method was found to be effective for the one-step immunoassay based on the switching peptide assay for OTA in wines with a markedly improved total analysis time (< 0.5 h). Additionally, the assay results were compared with commercial lateral flow immunoassay.
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Mansoor S, Rahouti A, Riaz S, Badea M, Hayat A. DNA-templated electrodeposition of silver nanoparticles for direct and label-free aptasensing of ochratoxin A. Anal Biochem 2021; 639:114540. [PMID: 34958751 DOI: 10.1016/j.ab.2021.114540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/09/2021] [Accepted: 12/22/2021] [Indexed: 11/26/2022]
Abstract
We present in this work, an aptasensing strategy based on the DNA-templated electrodeposition of silver nanoparticles (AgNPs). The homogeneous electro-deposition of AgNPs on screen printed carbon electrode (SPCE) surface was achieved based on a unique aptamer scaffold. This was constructed by immobilizing a DNA aptamer on SPCE by electrochemical oxidation of its amine groups. The electrodeposition of AgNPs was investigated before and after the addition of the aptamer's specific target; the mycotoxin, ochratoxin A (OTA). Electrochemical characterization by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) showed the effect of the scaffold layer on the electrodeposition of AgNPs. The conformational change induced by aptamer after binding its targeted molecule affects AgNPs electrodeposition and the electron transfer thus allowing OTA detection by cyclic voltammetry. The voltammograms showed a good proportionality between the analyte concentration and the current response. The constructed platform allowed the quantitative aptasensing of OTA within the range of (1.56-400 ng/mL) and the detection limit of 0.6 ng/mL. In term of aptasensor applicability, the proposed strategy showed excellent performance in rice samples.
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Affiliation(s)
- Seemal Mansoor
- Interdisciplinary Research Center in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore, Pakistan.
| | - Amina Rahouti
- Bioengineering Laboratory, Higher National School of Biotechnology, Constantine, Algeria.
| | - Sara Riaz
- Department of Chemistry, COMSATS University Islamabad, Lahore, Pakistan.
| | | | - Akhtar Hayat
- Interdisciplinary Research Center in Biomedical Materials (IRCBM), COMSATS University Islamabad, Lahore, Pakistan.
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6
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Li Q, Kang Y, Yin S, Qian Y, Cai Y, Yang Z. Graphene Oxide Synergy with the Conjugation of DNA and Quantum Dots for the Sensitive Detection of Ochratoxin A. FOOD ANAL METHOD 2021. [DOI: 10.1007/s12161-021-02135-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Guo Z, Tian J, Cui C, Wang Y, Yang H, Yuan M, Yu H. A label-free aptasensor for turn-on fluorescent detection of ochratoxin a based on SYBR gold and single walled carbon nanohorns. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107741] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Colombo R, Papetti A. Pre-Concentration and Analysis of Mycotoxins in Food Samples by Capillary Electrophoresis. Molecules 2020; 25:molecules25153441. [PMID: 32751123 PMCID: PMC7436008 DOI: 10.3390/molecules25153441] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/24/2020] [Accepted: 07/28/2020] [Indexed: 12/31/2022] Open
Abstract
Mycotoxins are considered one of the most dangerous agricultural and food contaminants. They are toxic and the development of rapid and sensitive analytical methods to detect and quantify them is a very important issue in the context of food safety and animal/human health. The need to detect mycotoxins at trace levels and to simultaneously analyze many different mycotoxin types became mandatory to protect public health. In fact, European Commission regulations specified both their limits in foodstuffs and official sample preparation protocols in addition to analytical methods to verify their presence. Capillary Electrophoresis (CE) includes different separation modes, allowing many versatile applications in food analysis and safety. In the context of mycotoxins, recent advances to improve CE sensitivity, particularly pre-concentration techniques or miniaturized systems, deserve remarkable attention, as they provide an interesting approach in the analysis of such contaminants in complex food matrices. This review summarizes the applications of CE combined with different pre-concentration approaches, which have been proposed in the literature (mainly) in the last ten years. A section is also dedicated to recent microchip–CE devices since they represent the most promising CE mode for this application.
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Affiliation(s)
| | - Adele Papetti
- Correspondence: ; Tel.: +39-0382987863; Fax: +39-0382422975
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Ding Y, Shang H, Wang X, Chen L. A SERS-based competitive immunoassay for highly sensitive and specific detection of ochratoxin A. Analyst 2020; 145:6079-6084. [DOI: 10.1039/d0an01220c] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A SERS sensor for ochratoxin A detection based on three-dimensional magnetic beads and competitive immunoassay.
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Affiliation(s)
- Yangjun Ding
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Hezhen Shang
- Department of Hepatobiliary Surgery
- Qingdao Chengyang District People's Hospital
- Qingdao 266109
- China
| | - Xiaokun Wang
- College of Marine Science and Biological Engineering
- Qingdao University of Science and Technology
- Qingdao
- China
| | - Lingxin Chen
- CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation
- Shandong Key Laboratory of Coastal Environmental Processes
- Yantai Institute of Coastal Zone Research
- Chinese Academy of Sciences
- Yantai 264003
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10
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Lv L, Cui C, Xie W, Sun W, Ji S, Tian J, Guo Z. A label-free aptasensor for turn-on fluorescent detection of ochratoxin A based on aggregation-induced emission probe. Methods Appl Fluoresc 2019; 8:015003. [PMID: 31622960 DOI: 10.1088/2050-6120/ab4edf] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A novel label-free fluorescence aptasensor used for the detection of ochratoxin A (OTA) is presented in this study. When aggregated on the surface of DNA aptamer, aggregation-induced emission (AIE) fluorescence probe presents turn-on fluorescence property. The method proposed in this article was based on an AIE probe, 4, 4-(1E,1E)-2, 2-(anthracene-9, 10-diyl) bis (ethene-2, 1-diyl) bis (N, N, N-trimethylbenzenaminium iodide) (DSAI). With OTA present, the aptamer will combine with OTA and the conformation of the aptamer will switch to an antiparallel G-quadruplex from the initial random coil, which obstructs its digestion by Exo I. After the solution is added with DSAI, DSAI will aggregate on the surface of the aptamer/OTA complex and produces a strong emission. In the range of 5 to 500 ng · ml-1 OTA concentrations, the fluorescence increases with a linear logarithm relationship. The detection limit is 1.9 ng · ml-1. This method was used to detect OTA in spiked real samples, with recoveries and RSDs in the range of 92.2% to 106.3%, and 2.7% to 5.2%, respectively.
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Affiliation(s)
- Lei Lv
- College of Agriculture, Yanbian University, Yanji, 133002, People's Republic of China
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11
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Le T, Sun Q, Xie Y, Shu L, Liu J, Xu J, Xiong J, Cao X. A Highly Sensitive Aptasensor for Sulfamethazine Detection Using an Enzyme-Linked Aptamer Assay. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1258-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Liu R, Wu H, Lv L, Kang X, Cui C, Feng J, Guo Z. Fluorometric aptamer based assay for ochratoxin A based on the use of exonuclease III. Mikrochim Acta 2018; 185:254. [PMID: 29656368 DOI: 10.1007/s00604-018-2786-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Accepted: 03/29/2018] [Indexed: 11/30/2022]
Abstract
This study describes an aptamer based assay for the mycotoxin ochratoxin A (OTA). The method is based on the use of an OTA-specific aptamer, exonuclease (Exo) III, SYBR Gold as a fluorescent probe, and a complementary strand that specifically combines with the aptamer. In the presence of OTA, the aptamer and OTA hybridize, thereby resulting in the formation of ssDNA, which is not digested by Exo III. Intense fluorescence is observed after addition of SYBR Gold (best measured at excitation/emission wavelengths of 495/540 nm). Fluorescence increases linearly with the log of the OTA concentration in the range from 8 to 1000 ng·mL-1. The detection limit is 4.7 ng·mL-1. The assay was applied to the determination of OTA in diluted [2%(v/v)] red wine, and recoveries and RSDs ranged between 93.5% and 113.8%, and between 3.2% and 5.7%, respectively. Graphical abstract In the presence of ochratoxin A (OTA), specific combinations of aptamer and OTA may occur and result in DNA double strands being untied, which avoids being digested by Exo III. Intense fluorescence is observed after SYBR Gold addition.
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Affiliation(s)
- Renjie Liu
- Institute of food science and engineering, Jilin agricultural University, Changchun, 130118, China
| | - Hua Wu
- Institute of food science and engineering, Jilin agricultural University, Changchun, 130118, China
- College of agriculture, Yanbian university, Yanji, 133002, China
| | - Lei Lv
- College of agriculture, Yanbian university, Yanji, 133002, China
| | - Xiaojiao Kang
- School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan, 523808, China
| | - Chengbi Cui
- College of agriculture, Yanbian university, Yanji, 133002, China
| | - Jin Feng
- College of agriculture, Yanbian university, Yanji, 133002, China
| | - Zhijun Guo
- College of agriculture, Yanbian university, Yanji, 133002, China.
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Zhu C, Zhang G, Huang Y, Yang S, Ren S, Gao Z, Chen A. Dual-competitive lateral flow aptasensor for detection of aflatoxin B 1 in food and feedstuffs. JOURNAL OF HAZARDOUS MATERIALS 2018; 344:249-257. [PMID: 29055198 DOI: 10.1016/j.jhazmat.2017.10.026] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 10/04/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
A novel dual-competitive lateral flow aptasensor (LFA) benefited from aptamer and lateral flow strips was first designed by using aflatoxin B1 (AFB1) as the model target. In this LFA assay, the target AFB1 competed with AFB1-hapten at T line for binding to Cy5-labeled AFB1 aptamer and the complementary strand competed with the target AFB1 for binding to Cy5-labeled AFB1 aptamer at C line. The ratio of their fluorescent intensities at the T line and C line (ST/SC ratio) was employed in order to increase the sensitivity for target AFB1 detection. This technique has the limit of detection (LOD) of 0.1ng/mL for AFB1 within the linear range from 0.1ng/mL to 1000ng/mL. Subsequently, the LFA approach was validated using 11 kinds of food and feedstuff samples with a simple aqueous extraction protocol. The test results with different naturally contaminated feedstuffs indicated a good correlation between this LFA and a commercial ELISA kit. The assay can be completed within 20min and its sensitivity, specificity and reproducibility are highly satisfactory. This is the first LFA that has been rigorously validated, which will be greatly beneficial to development of commercial aptamer-based biosensors for food safety, environmental analysis, particularly in clinical diagnosis.
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Affiliation(s)
- Chao Zhu
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Guilan Zhang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Yafei Huang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China; College of Food Science and Technology, Hainan University, Haikou 570228,China
| | - Shuming Yang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Shuyue Ren
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environment Medicine, Tianjin 300050, China
| | - Zhixian Gao
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Health and Environment Medicine, Tianjin 300050, China.
| | - Ailiang Chen
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China.
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Wang C, Tan R, Chen D. Fluorescence method for quickly detecting ochratoxin A in flour and beer using nitrogen doped carbon dots and silver nanoparticles. Talanta 2018; 182:363-370. [PMID: 29501165 DOI: 10.1016/j.talanta.2018.02.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 01/19/2018] [Accepted: 02/04/2018] [Indexed: 12/14/2022]
Abstract
In this paper, a FRET (Forster resonance energy transfer) based fluorescence method was developed for the quickly detection of ochratoxin A (OTA) in agricultural products (e.g., flour and beer). A highly fluorescent nitrogen doped carbon dots (CD) were served as energy donor, the DNA and MCH (6-mercapto-1-hexanol) modified Ag nanoparticles were served as energy acceptor in the FRET system. OTA can be detected in a concentration range between 10 and 5000 nM, the limit of detection is 8.7 nM. This method has three advantages: (1) an enhanced fluorescent intensity can be acquired by utilizing the nitrogen doped CD synthesized by one-step approach without sophisticated modification of nanoparticles; (2) OTA detection was accomplished quickly (less than 30 min) by using MCH as assistant molecule; (3) an extended OTA detection linear range was acquired, which may facilitate the OTA detection in real agricultural samples, and is helpful for solving food safety problems.
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Affiliation(s)
- Chengke Wang
- College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Rong Tan
- College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Dan Chen
- College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
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15
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Shen P, Li W, Liu Y, Ding Z, Deng Y, Zhu X, Jin Y, Li Y, Li J, Zheng T. High-Throughput Low-Background G-Quadruplex Aptamer Chemiluminescence Assay for Ochratoxin A Using a Single Photonic Crystal Microsphere. Anal Chem 2017; 89:11862-11868. [PMID: 28988477 DOI: 10.1021/acs.analchem.7b03592] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We reported a novel hemin-G-quadruplex aptamer chemiluminescence assay platform for ochratoxin A (OTA) using the single silica photonic crystal microsphere (SPCM). The oligonucleotide A sequence containing aptamer sequences of hemin and OTA is immobilized on the surface of SPCM. The other oligonucleotide B sequence containing a partially complementary sequence with one part OTA aptamer and one part hemin aptamer is used as a blocking chain. The hybridization between chain A and chain B will be influenced by the presence or absence of OTA in the system, which will affect the bioactivity of DNAzyme. Thus, the chemiluminescence signal depends on the concentration of OTA in the samples. In the single particle assay platform, the signal/noise is remarkably enhanced, and the background signal can be ignored by separating hemin from the surface of SPCM. The limit of detection of the new method reaches to the pg/mL scale, and the linear detection range is 4 orders of magnitude for OTA. The new assay platform can provide a sensitive, cost-efficient, simple, and high-throughput screening for OTA.
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Affiliation(s)
- Peng Shen
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Wei Li
- Department of Electronic and Electrical Engineering, The University of Sheffield , Sheffield S3 7HQ, United Kingdom
| | - Yan Liu
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Zhi Ding
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Yang Deng
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Xuerui Zhu
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Yanhao Jin
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Yichen Li
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Jianlin Li
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
| | - Tiesong Zheng
- Department of Food Science and Engineering, Nanjing Normal University , Nanjing 210024, China
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Fadock K, Manderville RA. DNA Aptamer-Target Binding Motif Revealed Using a Fluorescent Guanine Probe: Implications for Food Toxin Detection. ACS OMEGA 2017; 2:4955-4963. [PMID: 30023732 PMCID: PMC6044742 DOI: 10.1021/acsomega.7b00782] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/16/2017] [Indexed: 06/08/2023]
Abstract
DNA aptamers are single-stranded oligonucleotides that are generated by an in vitro selection method to bind targets with high affinity and specificity. Understanding molecular recognition by DNA aptamers is of fundamental importance in the development of biosensor applications. The small molecule ochratoxin A (OTA) is a fungal-derived food toxin, and OTA DNA aptamers have been established for the development of rapid detection platforms required for food safety. One such OTA aptamer (OTAA) is a guanine-rich DNA oligonucleotide that folds into an antiparallel G-quadruplex (GQ) upon OTA binding, although structural details of the GQ fold and its interaction with OTA are currently unknown. In the present study, the fluorescent nucleobase analogue, 8-thienyl-2'-deoxyguanosine (ThdG), was inserted into various G sites of OTAA to determine the probe impact on GQ folding and OTA binding affinity. Our results suggest that OTAA contains three lateral (l) loops connecting two stacked G-tetrads with an anticlockwise loop progression to afford a -(lll) GQ topology. The phenolic ring system of OTA undergoes π-stacking interactions with the G-tetrads of OTAA. Our results also demonstrate aptamer sites that can be modified with ThdG to afford a fluorescent light-up signal upon OTA binding.
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17
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Tian J, Wei W, Wang J, Ji S, Chen G, Lu J. Fluorescence resonance energy transfer aptasensor between nanoceria and graphene quantum dots for the determination of ochratoxin A. Anal Chim Acta 2017; 1000:265-272. [PMID: 29289319 DOI: 10.1016/j.aca.2017.08.018] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 08/11/2017] [Accepted: 08/14/2017] [Indexed: 10/19/2022]
Abstract
In the present work, colloidal cerium oxide nanoparticles (nanoceria) and graphene quantum dots (GQDs) were firstly synthesized by sol-gel method and pyrolysis respectively, which all have a uniform nano-size and significant fluorescence emission. Due to the fluorescence emission spectrum of nanoceria overlapped the absorption spectrum of GQDs, fluorescence resonance energy transfer (FRET) between nanoceria and GQDs could occur effectively by the electrostatic interaction. Based on it, a sensitive ratiometric fluorescence aptasensor for the determination of ochratoxin A (OTA), a small molecular mycotoxin produced by Aspergillus and Penicillium strains, has been successfully constructed. In which, probe DNA1@nanoceria and DNA2@GQD were designed to complementary with OTA aptamer, both could adsorb each other, leading to the occur of FRET. After adding of OTA aptamer and then introducing of OTA, the FRET would be interrupted/recovered due to the specific affinity of OTA and its aptamer, the fluorescence recovery value would increase with the addition of OTA. Under the optimal experimental conditions (pH 7, mGQD/nanoceria 2, captamer 100 nM, incubation time 30 min), the constructed ratiometric fluorescence aptasensor exhibited a satisfying linear range (0.01-20 ng mL-1), low limit of detection (2.5 pg mL-1) and good selectivity towards OTA, and has been successfully applied for the analysis of real sample peanuts with good accuracy of the recoveries ranged from 90 to 110%.
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Affiliation(s)
- Jiuying Tian
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Wenqi Wei
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Jiawen Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Saijie Ji
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Guichan Chen
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Jusheng Lu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, PR China.
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18
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Homogeneous Electrochemical Method for Ochratoxin A Determination Based on Target Triggered Aptamer Hairpin Switch and Exonuclease III-Assisted Recycling Amplification. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0771-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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19
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Rhouati A, Catanante G, Nunes G, Hayat A, Marty JL. Label-Free Aptasensors for the Detection of Mycotoxins. SENSORS 2016; 16:s16122178. [PMID: 27999353 PMCID: PMC5191157 DOI: 10.3390/s16122178] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/08/2016] [Accepted: 12/14/2016] [Indexed: 01/13/2023]
Abstract
Various methodologies have been reported in the literature for the qualitative and quantitative monitoring of mycotoxins in food and feed samples. Based on their enhanced specificity, selectivity and versatility, bio-affinity assays have inspired many researchers to develop sensors by exploring bio-recognition phenomena. However, a significant problem in the fabrication of these devices is that most of the biomolecules do not generate an easily measurable signal upon binding to the target analytes, and signal-generating labels are required to perform the measurements. In this context, aptamers have been emerged as a potential and attractive bio-recognition element to design label-free aptasensors for various target analytes. Contrary to other bioreceptor-based approaches, the aptamer-based assays rely on antigen binding-induced conformational changes or oligomerization states rather than binding-assisted changes in adsorbed mass or charge. This review will focus on current designs in label-free conformational switchable design strategies, with a particular focus on applications in the detection of mycotoxins.
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Affiliation(s)
- Amina Rhouati
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
- Ecole Nationale Supérieure de Biotechnologie, Constantine 25100, Algeria.
| | - Gaelle Catanante
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
| | - Gilvanda Nunes
- Technological Chemistry Department, Federal University of Maranhão, CCET/UFMA, Av. Portugueses, Cidade Universitária do Canga, 65080-040 São Luis, Brazil.
| | - Akhtar Hayat
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM) COMSATS Institute of Information Technology (CIIT), Lahore 54000, Pakistan.
| | - Jean-Louis Marty
- BAE Laboratory, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan 66860, France.
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20
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Aptamer based ultrasensitive determination of the β-adrenergic agonist ractopamine using PicoGreen as a fluorescent DNA probe. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-2032-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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21
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McKeague M, Velu R, De Girolamo A, Valenzano S, Pascale M, Smith M, DeRosa MC. Comparison of In-Solution Biorecognition Properties of Aptamers against Ochratoxin A. Toxins (Basel) 2016; 8:toxins8110336. [PMID: 27854269 PMCID: PMC5127132 DOI: 10.3390/toxins8110336] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 11/02/2016] [Accepted: 11/08/2016] [Indexed: 12/28/2022] Open
Abstract
Ochratoxin A (OTA) is a mycotoxin produced as a secondary metabolite by several species of Aspergillus and Penicillium and frequently found as a natural contaminant in a wide range of food commodities. Novel and robust biorecognition agents for detecting this molecule are required. Aptamers are artificial nucleic acid ligands able to bind with high affinity and specificity to a given target molecule. In the last few years, three separate research groups have selected aptamers for ochratoxin A. While each of these three families of aptamers have been incorporated into various methods for detecting OTA, it is unclear if each aptamer candidate is better suited for a particular application. Here, we perform the first head-to-head comparison of solution-based binding parameters for these groups of aptamers. Based on our results, we provide recommendations for the appropriate choice of aptamer for incorporation into solution-based biorecognition assays and applications.
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Affiliation(s)
- Maureen McKeague
- Chemistry Department, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada.
| | - Ranganathan Velu
- Chemistry Department, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada.
| | - Annalisa De Girolamo
- Institute of Sciences of Food Production, National Research Council of Italy, via G. Amendola 122/O, Bari 70126, Italy.
| | - Stefania Valenzano
- Institute of Sciences of Food Production, National Research Council of Italy, via G. Amendola 122/O, Bari 70126, Italy.
| | - Michelangelo Pascale
- Institute of Sciences of Food Production, National Research Council of Italy, via G. Amendola 122/O, Bari 70126, Italy.
| | - McKenzie Smith
- Chemistry Department, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada.
| | - Maria C DeRosa
- Chemistry Department, Carleton University, 1125 Colonel by Drive, Ottawa, ON K1S 5B6, Canada.
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22
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Bruno JG, Sivils JC. Studies of DNA Aptamer OliGreen and PicoGreen Fluorescence Interactions in Buffer and Serum. J Fluoresc 2016; 26:1479-87. [PMID: 27209004 DOI: 10.1007/s10895-016-1840-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 05/09/2016] [Indexed: 11/25/2022]
Abstract
Spectrofluorometric and emission peak titration and timed studies of OliGreen (OG) and PicoGreen (PG) were conducted in Tris EDTA (TE) buffer, pooled rat and fetal bovine serum with two different aptamers of 72 and 192 bases in length to determine if OG or PG were suitable for aptamer pharmacokinetic (PK) studies in sera. Results indicated that OG and PG detected the single-stranded (ss) and double-stranded (ds) stem-loop structures of the two aptamers quite well in TE with reliable standard curves having exponential character (or several linear detection regions) up to 1 μg/ml of aptamer DNA with detection limits of ~1 ng/ml. The intensity of OG and PG staining appeared to correlate with the number and percentage of ss and ds bases in each aptamer. OG and PG fluorescence in pooled rat serum or fetal bovine serum (FBS) did not titer as a function of DNA aptamer concentration from 1 μg/ml to 1 ng/ml. This lack of OG or PG aptamer assays in serum is contrary to most published reports of OG or PG assays for ss antisense oligonucleotides, ds PCR amplicons or other types of DNA in serum or plasma. Further studies suggested that the lack of OG and PG assay titration in serum might not be entirely due to aptamer degradation from nucleases in serum since the fluorescence signals in serum appeared relatively stable over time from 30 min to 4 hours. A hypothesis is presented which attributes the inability of OG or PG to assay aptamers in serum to a combination of high blue-green autofluorescence in serum with possible serum nuclease degradation of aptamers over time and the changing aptamer to serum protein ratio coupled to nonspecific binding of serum proteins to aptamers thereby possibly changing aptamer conformations as a function of aptamer concentration during titration experiments.
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Affiliation(s)
- John G Bruno
- Operational Technologies Corporation, 4100 NW Loop 410, Suite 230, San Antonio, TX, 78229, USA.
| | - Jeffrey C Sivils
- Operational Technologies Corporation, 4100 NW Loop 410, Suite 230, San Antonio, TX, 78229, USA
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23
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Ma DL, Wang W, Mao Z, Kang TS, Han QB, Chan PWH, Leung CH. Utilization of G-Quadruplex-Forming Aptamers for the Construction of Luminescence Sensing Platforms. Chempluschem 2016; 82:8-17. [DOI: 10.1002/cplu.201600036] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 03/07/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Wanhe Wang
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Zhifeng Mao
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences; University of Macau; Macao 999078 P. R. China
| | - Quan-Bin Han
- School of Chinese Medicine; Hong Kong Baptist University; Kowloon Hong Kong 852 P. R. China
| | - Philip Wai Hong Chan
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
- Department of Chemistry; University of Warwick; Coventry CV4 7AL United Kingdom
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences; University of Macau; Macao 999078 P. R. China
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24
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Chauhan R, Singh J, Sachdev T, Basu T, Malhotra BD. Recent advances in mycotoxins detection. Biosens Bioelectron 2016; 81:532-545. [PMID: 27019032 DOI: 10.1016/j.bios.2016.03.004] [Citation(s) in RCA: 176] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/25/2016] [Accepted: 03/03/2016] [Indexed: 01/01/2023]
Abstract
Mycotoxins contamination in both food and feed is inevitable. Mycotoxin toxicity in foodstuff can occur at very low concentrations necessitating early availability of sensitive and reliable methods for their detection. The present research thrust is towards the development of a user friendly biosensor for mycotoxin detection at both academic and industrial levels to replace conventional expensive chromatographic and ELISA techniques. This review critically analyzes the recent research trend towards the construction of immunosensor, aptasensor, enzymatic sensors and others for mycotoxin detection with a reference to label and label free methods, synthesis of new materials including nano dimension, and transuding techniques. Technological aspects in the development of biosensors for mycotoxin detection, current challenges and future prospects are also included to provide a overview and suggestions for future research directions.
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Affiliation(s)
- Ruchika Chauhan
- Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida, India.
| | - Jay Singh
- Department of Applied Chemistry & Polymer Technology, Delhi Technological University, Delhi 110042, India.
| | - Tushar Sachdev
- Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida, India.
| | - T Basu
- Amity Institute of Nanotechnology, Amity University Uttar Pradesh, Noida, India.
| | - B D Malhotra
- Department of Biotechnology, Delhi Technological University, Delhi, India.
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25
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Dou X, Chu X, Kong W, Luo J, Yang M. An indirect competitive fluorescence assay for ochratoxin A based on molecular beacon. RSC Adv 2016. [DOI: 10.1039/c5ra23966d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel, simple and efficient method based on molecular beacon probe was developed to detect ochratoxin A.
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Affiliation(s)
- Xiaowen Dou
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100193
- China
| | - Xianfeng Chu
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100193
- China
| | - Weijun Kong
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100193
- China
| | - Jiaoyang Luo
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100193
- China
| | - Meihua Yang
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Beijing 100193
- China
- Hainan Branch Institute of Medicinal Plant Development
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26
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Deng H, Long M, Tian G, Song C, Liu H, Hu L, Lv C. Detection of radon based on the lead-induced conformational change in aptamer T30695. RSC Adv 2016. [DOI: 10.1039/c6ra03481k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel G-quadruplex sensor for the highly selective detection of accumulated radon and its decay products with low interference.
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Affiliation(s)
- Han Deng
- College of Public Health
- University of South China
- Hengyang 421001
- China
| | - Minzhi Long
- College of Public Health
- University of South China
- Hengyang 421001
- China
| | - Gang Tian
- College of Public Health
- University of South China
- Hengyang 421001
- China
| | - Chunli Song
- College of Public Health
- University of South China
- Hengyang 421001
- China
| | - Hongwen Liu
- College of Public Health
- University of South China
- Hengyang 421001
- China
| | - Liqin Hu
- College of Public Health
- University of South China
- Hengyang 421001
- China
| | - Changyin Lv
- College of Public Health
- University of South China
- Hengyang 421001
- China
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27
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Sharma A, Hayat A, Mishra RK, Catanante G, Shahid SA, Bhand S, Marty JL. Design of a fluorescence aptaswitch based on the aptamer modulated nano-surface impact on the fluorescence particles. RSC Adv 2016. [DOI: 10.1039/c6ra10942j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The concept of DNA based stabilization of nanostructures to enhance the surface reactivity has been the focus of great interest in the design of colorimetric aptaswitches.
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Affiliation(s)
- Atul Sharma
- BAE Laboratoire
- Université de Perpignan Via Domitia
- 66860 Perpignan 13 Cedex
- France
- Biosensor Lab
| | - Akhtar Hayat
- BAE Laboratoire
- Université de Perpignan Via Domitia
- 66860 Perpignan 13 Cedex
- France
- Interdisciplinary Research Centre in Biomedical Materials (IRCBM)
| | - Rupesh Kumar Mishra
- BAE Laboratoire
- Université de Perpignan Via Domitia
- 66860 Perpignan 13 Cedex
- France
- Department of Biosciences and Biotechnology
| | - Gaëlle Catanante
- BAE Laboratoire
- Université de Perpignan Via Domitia
- 66860 Perpignan 13 Cedex
- France
| | | | - Sunil Bhand
- Biosensor Lab
- Department of Chemistry
- BITS, Pilani-K. K. Birla Goa Campus
- Goa
- India
| | - Jean Louis Marty
- BAE Laboratoire
- Université de Perpignan Via Domitia
- 66860 Perpignan 13 Cedex
- France
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28
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Ha TH. Recent Advances for the Detection of Ochratoxin A. Toxins (Basel) 2015; 7:5276-300. [PMID: 26690216 PMCID: PMC4690132 DOI: 10.3390/toxins7124882] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 11/25/2015] [Accepted: 11/26/2015] [Indexed: 12/15/2022] Open
Abstract
Ochratoxin A (OTA) is one of the mycotoxins secreted by Aspersillus and Penicillium that can easily colonize various grains like coffee, peanut, rice, and maize. Since OTA is a chemically stable compound that can endure the physicochemical conditions of modern food processing, additional research efforts have been devoted to develop sensitive and cost-effective surveillance solutions. Although traditional chromatographic and immunoassays appear to be mature enough to attain sensitivity up to the regulation levels, alternative detection schemes are still being enthusiastically pursued in an attempt to meet the requirements of rapid and cost-effective detections. Herein, this review presents recent progresses in OTA detections with minimal instrumental usage, which have been facilitated by the development of OTA aptamers and by the innovations in functional nanomaterials. In addition to the introduction of aptamer-based OTA detection techniques, OTA-specific detection principles are also presented, which exclusively take advantage of the unique chemical structure and related physicochemical characteristics.
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Affiliation(s)
- Tai Hwan Ha
- BioNanotechnology Research Centre, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea.
- Nanobiotechnology (Major), Korea University of Science & Technology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Korea.
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29
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A label free aptasensor for Ochratoxin A detection in cocoa beans: An application to chocolate industries. Anal Chim Acta 2015; 889:106-12. [PMID: 26343432 DOI: 10.1016/j.aca.2015.06.052] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 06/26/2015] [Accepted: 06/27/2015] [Indexed: 11/23/2022]
Abstract
Contamination of food by mycotoxin occurs in minute/trace quantities. Nearly 92.5% of the cocoa samples present Ochratoxin A (OTA) levels at trace quantity. Hence, there is a necessity for a highly sensitive and selective device that can detect and quantify these organic toxins in various matrices such as cocoa beans. This work reports for the first time, a facile and label-free electrochemical impedimetric aptasensor for rapid detection and quantitation of OTA in cocoa beans. The developed aptasensor was constructed based on the diazonium-coupling reaction mechanism for the immobilization of anti-OTA-aptamer on screen printed carbon electrodes (SPCEs). The aptasensor exhibited a very good limit of detection (LOD) as low as 0.15 ng/mL, with added advantages of good selectivity and reproducibility. The increase in electron transfer resistance was linearly proportional to the OTA concentration in the range 0.15-2.5 ng/mL, with an acceptable recovery percentage (91-95%, RSD = 4.8%) obtained in cocoa samples. This work can facilitate a general model for the detection of OTA in cocoa beans based on the impedimetric aptasensor. The analysis can be performed onsite with pre-constructed and aptamer modified electrodes employing a portable EIS set up.
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30
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Single-Stranded DNA Aptamers against Pathogens and Toxins: Identification and Biosensing Applications. BIOMED RESEARCH INTERNATIONAL 2015. [PMID: 26199940 PMCID: PMC4493287 DOI: 10.1155/2015/419318] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Molecular recognition elements (MREs) can be short sequences of single-stranded DNA, RNA, small peptides, or antibody fragments. They can bind to user-defined targets with high affinity and specificity. There has been an increasing interest in the identification and application of nucleic acid molecular recognition elements, commonly known as aptamers, since they were first described in 1990 by the Gold and Szostak laboratories. A large number of target specific nucleic acids MREs and their applications are currently in the literature. This review first describes the general methodologies used in identifying single-stranded DNA (ssDNA) aptamers. It then summarizes advancements in the identification and biosensing application of ssDNA aptamers specific for bacteria, viruses, their associated molecules, and selected chemical toxins. Lastly, an overview of the basic principles of ssDNA aptamer-based biosensors is discussed.
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31
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Al-Kaidy H, Duwe A, Huster M, Muffler K, Schlegel C, Sieker T, Stadtmüller R, Tippkötter N, Ulber R. Biotechnology and Bioprocess Engineering - From the First Ullmann's Article to Recent Trends. CHEMBIOENG REVIEWS 2015. [DOI: 10.1002/cben.201500008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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32
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Lu L, Wang M, Liu LJ, Leung CH, Ma DL. Label-Free Luminescent Switch-On Probe for Ochratoxin A Detection Using a G-Quadruplex-Selective Iridium(III) Complex. ACS APPLIED MATERIALS & INTERFACES 2015; 7:8313-8318. [PMID: 25836665 DOI: 10.1021/acsami.5b01702] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A library of six luminescent Ir(III) complexes were synthesized and studied for their capacity to function as probes for G-quadruplex DNA. The novel Ir(III) complex 1 was discovered to be selective for G-quadruplex structures and was subsequently used for the construction of a label-free G-quadruplex-based ochratoxin A (OTA) sensing platform in aqueous solution. The assay exhibited linearity for OTA in the range of 0 to 60 nM (R2=0.9933), and the limit of detection for OTA was 5 nM. Furthermore, this assay was highly selective for OTA over its structurally related analogues.
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Affiliation(s)
- Lihua Lu
- †Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Modi Wang
- †Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Li-Juan Liu
- ‡State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Chung-Hang Leung
- ‡State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Dik-Lung Ma
- †Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
- §Partner State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong, China
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33
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Alfaro K, Bustos P, O Sullivan C, Conejeros P. Facile and Cost-Effective Detection of Saxitoxin Exploiting Aptamer Structural Switching. Food Technol Biotechnol 2015; 53:337-341. [PMID: 27904366 DOI: 10.17113/ftb.53.03.15.3911] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A simple method to detect saxitoxin (STX), one of the main components of the paralytic shellfish poison from red tide, has been developed. By using a next generation dye for double-stranded DNA we were able to differentiate fluorescence from STX-binding aptamers when exposed to different concentrations of STX, suggesting a change in aptamer folding upon target binding. The developed method is extremely rapid, only requiring small sample volumes, with quantitative results in the concentration range of 15 ng/mL to 3 µg/mL of STX, with a detection limit of 7.5 ng/mL.
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Affiliation(s)
- Karol Alfaro
- Centro de Investigación y Gestión de Recursos Naturales, Facultad de Ciencias,
Universidad de Valparaíso, Gran Bretańa 1111, Valparaíso, Chile
| | - Paulina Bustos
- Centro de Investigación y Gestión de Recursos Naturales, Facultad de Ciencias,
Universidad de Valparaíso, Gran Bretańa 1111, Valparaíso, Chile
| | - Ciara O Sullivan
- Nanobiotechnology and Bioanalysis Group, Department of Chemical Engineering,
Universitat Rovira i Virgili, 43007 ES-Tarragona, Spain
| | - Pablo Conejeros
- Centro de Investigación y Gestión de Recursos Naturales, Facultad de Ciencias,
Universidad de Valparaíso, Gran Bretańa 1111, Valparaíso, Chile
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34
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Wang C, Dong X, Liu Q, Wang K. Label-free colorimetric aptasensor for sensitive detection of ochratoxin A utilizing hybridization chain reaction. Anal Chim Acta 2014; 860:83-8. [PMID: 25682251 DOI: 10.1016/j.aca.2014.12.031] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/14/2014] [Accepted: 12/15/2014] [Indexed: 11/25/2022]
Abstract
The combination of high selectivity of aptamer with the peroxidase-mimicking property of DNAzyme has presented considerable opportunities for designing colorimetric aptasensor for detection of ochratoxin A (OTA). The activities of both aptamer (as biorecognition element) and DNAzyme (as signal amplification element) are blocked via base pairing in the hairpin structure. Hybridization chain reaction (HCR) between two hairpin DNAs was employed to further improve the sensitivity of this method. The presence of OTA triggers the opening of the hairpin structure and the beginning of HCR, which results in the release of many DNAzyme, and generates enhanced colorimetric signals, which is correlated to the amounts of OTA with linear range between 0.01 to 0.32 nM, and the limit of detection is 0.01 nM under optimal conditions. OTA in yellow rice wine and wheat flour samples was also detected using this method. We demonstrate that a new colorimetric method for the detection of OTA has been established, which is simple, easy to conduct, label-free, sensitive, high throughput, and cost-saving.
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Affiliation(s)
- Chengke Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xiaoya Dong
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Qian Liu
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Kun Wang
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
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Al-Kaidy H, Duwe A, Huster M, Muffler K, Schlegel C, Sieker T, Stadtmüller R, Tippkötter N, Ulber R. Biotechnologie und Bioverfahrenstechnik - Vom ersten Ullmanns Artikel bis hin zu aktuellen Forschungsthemen. CHEM-ING-TECH 2014. [DOI: 10.1002/cite.201400083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Aptamer-based technology for food analysis. Appl Biochem Biotechnol 2014; 175:603-24. [PMID: 25338114 DOI: 10.1007/s12010-014-1289-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 10/06/2014] [Indexed: 02/07/2023]
Abstract
Aptamers are short and functional single-stranded oligonucleotide sequences selected from systematic evolution of ligands by exponential enrichment (SELEX) process, which have the capacity to recognize various classes of target molecules with high affinity and specificity. Various analytical aptamers acquired by SELEX are widely used in many research fields, such as medicine, biology, and chemistry. However, the application of this innovative and emerging technology to food safety is just in infant stage. Food safety plays a very important role in our daily lives because varieties of poisonous and harmful substances in food affect human health. Aptamer technique is promising, which can overcome many disadvantages of existing detection methods in food safety, such as long detection time, low sensitivity, difficult, and expensive antibody preparation. This review provides an overview of various aptamer screening technologies and summarizes the recent applications of aptamers in food safety, and future prospects are also discussed.
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Lv Z, Liu J, Bai W, Yang S, Chen A. A simple and sensitive label-free fluorescent approach for protein detection based on a Perylene probe and aptamer. Biosens Bioelectron 2014; 64:530-4. [PMID: 25310484 DOI: 10.1016/j.bios.2014.09.095] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 09/30/2014] [Accepted: 09/30/2014] [Indexed: 01/11/2023]
Abstract
Highly sensitive detection of proteins is of great importance for effective clinical diagnosis and biomedical research. However, so far most detection methods rely on antibody-based immunoassays and are usually laborious and time-consuming with poor sensitivity. Here, we developed a simple and ultra-sensitive method to detect a biomarker protein-thrombin by taking advantage of the fluorescent probe Perylene tetracarboxylic acid diimide (PTCDI) derivatives and thrombin aptamer. The water-soluble dye PTCDI shows strong fluorescence in buffer solution for the existence of free dye monomer, but becomes weak after aggregation through self-assembly on nucleic acid aptamer. In the presence of thrombin, it specifically binds to thrombin aptamer which causes the conformational transition between aptamer and PTCDI and results in a significant fluorescence recovery. The results showed that as low as 40 pM of thrombin could be detected by this method. The high sensitivity of the developed sensing system mainly attributes to the ultra-sensitivity of the fluorescence intensity changes of PTCDI. With the specificity of aptamer, the assay exhibited high selectivity for thrombin against three other proteins (bovine serum albumin, lysozyme, mouse IgG) and 1% diluted fetal bovine serum. The detection method might be extended to sensitive detection of a variety of proteins for its advantages of isothermal conditions required, simple and rapid without multiple separation and washing steps.
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Affiliation(s)
- Zhenzhen Lv
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China; College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
| | - Jinchuan Liu
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Wenhui Bai
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Shuming Yang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
| | - Ailiang Chen
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China.
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