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Mermiga E, Pagkali V, Kokkinos C, Economou A. An Aptamer-Based Lateral Flow Biosensor for Low-Cost, Rapid and Instrument-Free Detection of Ochratoxin A in Food Samples. Molecules 2023; 28:8135. [PMID: 38138623 PMCID: PMC10746035 DOI: 10.3390/molecules28248135] [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: 12/04/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023] Open
Abstract
In this work, a simple and cost-efficient aptasensor strip is developed for the rapid detection of OTA in food samples. The biosensor is based on the lateral flow assay concept using an OTA-specific aptamer for biorecognition of the target analyte. The strip consists of a sample pad, a conjugate pad, a nitrocellulose membrane (NC) and an absorbent pad. The conjugate pad is loaded with the OTA-specific aptamer conjugated with gold nanoparticles (AuNPs). The test line of the NC membrane is loaded with a specific OTA-aptamer probe and the control line is loaded with a control probe. The assay is based on a competitive format, where the OTA present in the sample combines with the OTA aptamer-AuNP conjugate and prevents the interaction between the specific probe immobilized on the test line and the OTA aptamer-AuNP conjugates; therefore, the color intensity of the test line decreases as the concentration of OTA in the sample increases. Qualitative detection of OTA is performed visually, while quantification is performed by reflectance colorimetry using a commercial scanner and image analysis. All the parameters of the assay are investigated in detail and the analytical features are established. The visual limit of detection (LOD) of the strip is 0.05 ng mL-1, while the LOD for semi-quantitative detection using reflectance colorimetry is 0.02 ng mL-1. The lateral flow strip aptasensor is applied to the detection of OTA in wine, beer, apple juice and milk samples with recoveries in the range from 91 to 114%. The assay exhibits a satisfactory selectivity for OTA with respect to other mycotoxins and lasts 20 min. Therefore, the lateral flow strip aptasensor could be useful for the rapid, low-cost and fit-for-purpose on-site detection of OTA in food samples.
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Affiliation(s)
| | | | | | - Anastasios Economou
- Department of Chemistry, National and Kapodistrian University of Athens, 157 71 Athens, Greece; (E.M.); (V.P.); (C.K.)
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Khataee A, Sohrabi H, Arbabzadeh O, Khaaki P, Majidi MR. Frontiers in conventional and nanomaterials based electrochemical sensing and biosensing approaches for Ochratoxin A analysis in foodstuffs: A review. Food Chem Toxicol 2021; 149:112030. [DOI: 10.1016/j.fct.2021.112030] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 01/19/2021] [Accepted: 01/24/2021] [Indexed: 12/22/2022]
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Nao SC, Wu KJ, Wang W, Leung CH, Ma DL. Recent Progress and Development of G-Quadruplex-Based Luminescent Assays for Ochratoxin A Detection. Front Chem 2020; 8:767. [PMID: 33088800 PMCID: PMC7490745 DOI: 10.3389/fchem.2020.00767] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 07/23/2020] [Indexed: 12/14/2022] Open
Abstract
Ochratoxin A (OTA) is a mycotoxin that is widespread throughout the world. It contaminates foods such as vegetables, fruits, and rice. It harms human health and has potential carcinogenic effects. The G-quadruplex (G4) is a tetraplexed DNA structure generated from guanine-rich DNA that has found emerging use in aptamer-based sensing systems. This review outlines the status of OTA contamination and conventional detection methods for OTA. Various G4-based methods to detect OTA developed in recent years are summarized along with their advantages and disadvantages compared to existing approaches.
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Affiliation(s)
- Sang-Cuo Nao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, China
| | - Ke-Jia Wu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, China
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More AS, Ranadheera CS, Fang Z, Warner R, Ajlouni S. Biomarkers associated with quality and safety of fresh-cut produce. FOOD BIOSCI 2020. [DOI: 10.1016/j.fbio.2019.100524] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Zhang S, Chai H, Cheng K, Song L, Chen W, Yu L, Lu Z, Liu B, Zhao YD. Ultrasensitive and regenerable nanopore sensing based on target induced aptamer dissociation. Biosens Bioelectron 2020; 152:112011. [PMID: 32056734 DOI: 10.1016/j.bios.2020.112011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/24/2019] [Accepted: 01/07/2020] [Indexed: 02/05/2023]
Abstract
For ionic current rectification (ICR) based sensing, nanopore functionalizations are mostly designed for directly binding target molecules to generate detectable signals from surface charge variation. However, this strategy is highly dependent on the charge difference between the captured molecules and surface functionalization layers, which will increase the nanopore design difficulty and subsequently limit the nanopore applicability. Another key challenge for ICR based sensing is the nanopore regenerability that is critical if online monitoring or repeated determination needs to be performed with one sensor. Though some types of nanopore regeneration have been realized on some specific targets or with harsh conditions, it is still highly favored to develop a regenerability using mild conditions for various targets. To address these two challenges, we developed a novel and universal sensing strategy for aptamer-functionalized nanopore that can be easily regenerated after each usage without any harsh conditions and independent of target molecule charge or size for ICR based nanopore sensing. Ochratoxin A (OTA) was used as a model analyte and its corresponding aptamer partially hybridized with the pre-immobilized complementary DNA (cDNA) onto the nanopore inner surface. We demonstrated that the recognition and conjugation of OTA with its aptamer resulted in rectified ionic current variations due to the dissociation between the OTA aptamer and its partially paired cDNA. The performance of this nanopore sensor including sensitivity, selectivity, regenerability, and applicability was characterized using rectified ionic current. This nanopore sensing strategy will provide a promising platform for extensive targets and online sensing applications.
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Affiliation(s)
- Shujie Zhang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, PR China
| | - Huihui Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, PR China
| | - Kai Cheng
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Laibo Song
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Wei Chen
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
| | - Ling Yu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, PR China.
| | - Zhisong Lu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing, 400715, PR China
| | - Bo Liu
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Yuan-Di Zhao
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
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Huang R, Xiong LL, Chai HH, Fu JJ, Lu Z, Yu L. Sensitive colorimetric detection of ochratoxin A by a dual-functional Au/Fe3O4 nanohybrid-based aptasensor. RSC Adv 2019; 9:38590-38596. [PMID: 35540181 PMCID: PMC9075840 DOI: 10.1039/c9ra07899a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 11/20/2019] [Indexed: 12/16/2022] Open
Abstract
A novel colorimetric aptasensor based on a Au/Fe3O4 nanohybrid was developed to detect ochratoxin A (OTA). The aptasensor is composed of a free OTA aptamer, a Au/Fe3O4 nanohybrid coated with biotinylated complementary DNA of the OTA aptamer (biotin-cDNA-Au/Fe3O4), and free alkaline-phosphatase-labeled streptavidin (SA-ALP). The Au/Fe3O4 nanohybrid not only immobilizes biotin-cDNA but also magnetically separates SA-ALP from the sample solution. One part of the OTA aptamer sequence hybridizes with biotin-cDNA immobilized on Au/Fe3O4, and the left part of the OTA aptamer sequence covers the biotin and blocks the specific interaction between biotin and SA-ALP. OTA can interrupt the interaction of OTA aptamer binding to biotin-cDNA-Au/Fe3O4 and can inhibit the shielding effect of the OTA aptamer on biotin. The amount of SA-ALP that can be captured by biotin-cDNA-Au/Fe3O4 thus increases with increasing OTA concentration. Through a simple magnetic separation, the collected SA-ALP-linked Au/Fe3O4 can produce a yellow-colored solution in the presence of p-nitrophenyl phosphate (p-NPP). This colorimetric aptasensor can detect OTA as low as 1.15 ng mL−1 with high specificity. A novel colorimetric aptasensor based on a Au/Fe3O4 nanohybrid was developed to detect ochratoxin A (OTA).![]()
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Affiliation(s)
- Rong Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
| | - Lu Lu Xiong
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
| | - Hui Hui Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
| | - Jing Jing Fu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
| | - Zhisong Lu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
| | - Ling Yu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- Institute for Clean Energy and Advanced Materials
- School of Materials and Energy
- Southwest University
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7
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Song D, Yang R, Fang S, Liu Y, Long F, Zhu A. SERS based aptasensor for ochratoxin A by combining Fe3O4@Au magnetic nanoparticles and Au-DTNB@Ag nanoprobes with multiple signal enhancement. Mikrochim Acta 2018; 185:491. [DOI: 10.1007/s00604-018-3020-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/23/2018] [Indexed: 11/29/2022]
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Liu F, Ding A, Zheng J, Chen J, Wang B. A Label-Free Aptasensor for Ochratoxin a Detection Based on the Structure Switch of Aptamer. SENSORS 2018; 18:s18061769. [PMID: 29857594 PMCID: PMC6022100 DOI: 10.3390/s18061769] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/28/2018] [Accepted: 05/28/2018] [Indexed: 12/12/2022]
Abstract
A label-free sensing platform is developed based on switching the structure of aptamer for highly sensitive and selective fluorescence detection of ochratoxin A (OTA). OTA induces the structure of aptamer, transforms into G-quadruplex and produces strong fluorescence in the presence of zinc(II)-protoporphyrin IX probe due to the specific bind to G-quadruplex. The simple method exhibits high sensitivity towards OTA with a detection limit of 0.03 nM and excellent selectivity over other mycotoxins. In addition, the successful detection of OTA in real samples represents a promising application in food safety.
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Affiliation(s)
- Feng Liu
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Ailing Ding
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Jiushang Zheng
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Jiucun Chen
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.
| | - Bin Wang
- Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, 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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De Jesus CL, Bartley A, Welch AZ, Berry JP. High Incidence and Levels of Ochratoxin A in Wines Sourced from the United States. Toxins (Basel) 2017; 10:toxins10010001. [PMID: 29267200 PMCID: PMC5793088 DOI: 10.3390/toxins10010001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 12/12/2017] [Accepted: 12/15/2017] [Indexed: 11/16/2022] Open
Abstract
Ochratoxin A (OTA) is one of the most prevalent mycotoxin contaminants of food crops. Among the agricultural products consequently contaminated by OTA is wine. In the present study, a sample of wines sourced from the United States was assessed for OTA. Wines were primarily analyzed by high-performance liquid chromatography with fluorescence detection (HPLC-FD) coupled to a liquid-liquid extraction (LLE) technique which was developed and validated as a simplified sample preparation approach. More than 85% of the wines evaluated were found to contain OTA, at levels above the limit-of-detection (LOD = 0.1 µg L−1), and 76% were above the limit-of-quantitation (LOQ = 0.3 µg L−1) for the LLE/HPLC-FD method. More than two-thirds of the wines above the LOQ were found to exceed 1 µg L−1. Complementary analysis by HPLC coupled to tandem mass spectrometry (HPLC-MS/MS) confirmed OTA in 74% of the OTA-positive wines (i.e., >LOQ by HPLC-FD). Overall, both the occurrence and measured levels of OTA were generally high, specifically relative to previous assessments of OTA in wine, and two of the wines were above the only current (European Union) regulatory limit of two parts-per-billion (ppb, ~2 µg L−1). Possible trends with respect to geographical region and/or growing climate are noted. As the first assessment of U.S. wines in more than a decade, the overall high occurrence and levels of OTA in wine, and possible geographic and climatic trends, point to a need for regular surveillance of wines, as well as investigation of the relevant contributors to OTA occurrence toward mitigating contamination and exposure risks.
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Affiliation(s)
- Christopher Lawrence De Jesus
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151st Street, North Miami, FL 33181, USA.
| | - Amanda Bartley
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151st Street, North Miami, FL 33181, USA.
| | - Aaron Z Welch
- Biomolecular Sciences Institute, Florida International University, Miami, FL 33181, USA.
| | - John P Berry
- Department of Chemistry and Biochemistry, Florida International University, 3000 NE 151st Street, North Miami, FL 33181, USA.
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Badie Bostan H, Danesh NM, Karimi G, Ramezani M, Mousavi Shaegh SA, Youssefi K, Charbgoo F, Abnous K, Taghdisi SM. Ultrasensitive detection of ochratoxin A using aptasensors. Biosens Bioelectron 2017; 98:168-179. [PMID: 28672192 DOI: 10.1016/j.bios.2017.06.055] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/22/2017] [Accepted: 06/25/2017] [Indexed: 12/28/2022]
Abstract
Regarding teratogenic, carcinogenic, and immunotoxic nature of ochratoxin A (OTA), selective and sensitive monitoring of this molecule in food samples is of great importance. In recent years, various methods have been introduced for detection of OTA. However, they are usually time-consuming, labor-intensive and expensive. Therefore, these parameters limited their usage. The emerging method of detection, aptasensor, has attracted more attention for OTA detection, due to distinctive advantages including high sensitivity, selectivity and simplicity. In this review, the new developed aptasensors for detection of OTA have been investigated. We also highlighted advantages and disadvantages of different types of OTA aptasensors. This review also takes into consideration the goal to find out which designs are the most rational ones for highly sensitive detection of OTA.
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Affiliation(s)
- Hasan Badie Bostan
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Noor Mohammad Danesh
- Nanotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Research Institute of Sciences and New Technology, Mashhad, Iran; Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gholamreza Karimi
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Ramezani
- Nanotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Kazem Youssefi
- Department of English, Tabaran Institute of Higher Education, Mashhad, Iran
| | - Fahimeh Charbgoo
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Seyed Mohammad Taghdisi
- Targeted Drug Delivery Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
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Chen F, Luan C, Wang L, Wang S, Shao L. Simultaneous determination of six mycotoxins in peanut by high-performance liquid chromatography with a fluorescence detector. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:1805-1810. [PMID: 27476832 DOI: 10.1002/jsfa.7978] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 06/15/2016] [Accepted: 07/25/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Mycotoxins, which may contaminate peanut and peanut products, are responsible for many diseases to humans. Aflatoxin B1 (AFB1), aflatoxin G1 (AFG1), aflatoxin B2 (AFB2), aflatoxin G2 (AFG2), ochratoxin A (OTA) and zearalenone (ZEN) are considered the most relevant groups of mycotoxins found in food. This work aimed to develop a high-performance liquid chromatography method with a fluorescence detector (HPLC-FLD) combined with dispersive liquid-liquid microextraction (DLLME) method for the simultaneous determination of the six mycotoxins in peanuts. The six mycotoxins were simultaneously determined under their best wavelength by means of changing wavelength. RESULTS Under the optimum conditions, the linear ranges were 1-100 ng mL-1 for AFB1, AFG1 and OTA, 0.3-30 ng mL-1 for AFB2 and AFG2, 5-1000 ng mL-1 for ZEN, with the correlation coefficient (R2 ) of 0.9969-0.9997. Limits of detection (LODs) were 0.10, 0.10, 0.30, 0.03, 0.03 and 1.0 µg kg-1 , respectively, and the mean recoveries were in the range of 83.1% to 99.3% with RSD < 10% (n = 6, independent analysis). Thirteen (46%) of these tested samples were contaminated with at least one mycotoxin. CONCLUSION The proposed method was demonstrated to be simple, highly selective, accurate, reliable, and was successfully applied to simultaneously analyse the six mycotoxins in real peanut samples from China. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Fangfang Chen
- School of Public Health, Shandong University, Jinan, 250012, Shandong Province, China
| | - Chuanlei Luan
- School of Public Health, Shandong University, Jinan, 250012, Shandong Province, China
| | - Lin Wang
- School of Public Health, Shandong University, Jinan, 250012, Shandong Province, China
| | - Shue Wang
- School of Public Health, Shandong University, Jinan, 250012, Shandong Province, China
| | - Lihua Shao
- School of Public Health, Shandong University, Jinan, 250012, Shandong Province, China
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Zhou W, Kong W, Dou X, Zhao M, Ouyang Z, Yang M. An aptamer based lateral flow strip for on-site rapid detection of ochratoxin A in Astragalus membranaceus. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1022:102-108. [PMID: 27085019 DOI: 10.1016/j.jchromb.2016.04.016] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 03/24/2016] [Accepted: 04/08/2016] [Indexed: 11/18/2022]
Abstract
An aptamer based lateral flow strip based on competitive format was developed for on-site rapid detection of ochratoxin A (OTA) in Astragalus membranaceus. Some crucial parameters that might influence the sensitive detection, such as the characterization of the colloidal gold, size and shape of gold nanoparticles (AuNPs), amount of AuNPs-aptamer conjugate, migration rate and the addition amount of methanol, were investigated to provide the optimum assay performance. To perform the test, 1g sample was extracted with 2.5mL of methanol-water (80:20, v/v) and diluted by 4-fold running buffer to eliminate the matrix and methanol interferences. Under optimized conditions, the aptamer-based assay showed a visual limit of detection (LOD) of 1ngmL(-1), and with no significant cross-reactivity with several homologous toxins. The whole detection could be completed within 15min without special equipment because of available visual results. One out of nine A. membranaceus samples was found to be positive of OTA, which was in a good agreement with those obtained from LC-MS/MS analysis. The results demonstrated that the aptamer-based lateral flow assay could be used as a rapid, reliable, cost-effective and robust on-site screening technique for mycotoxins at trace level in complex matrices without special instrumentation.
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Affiliation(s)
- Weilu Zhou
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China; School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Weijun Kong
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Xiaowen Dou
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Ming Zhao
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Zhen Ouyang
- School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Meihua Yang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China.
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Fabregat-Cabello N, Zomer P, Sancho J, Roig-Navarro A, Mol H. Comparison of approaches to deal with matrix effects in LC-MS/MS based determinations of mycotoxins in food and feed. WORLD MYCOTOXIN J 2016. [DOI: 10.3920/wmj2014.1872] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This study deals with one of the major concerns in mycotoxin determinations: the matrix effect related to LC-MS/ MS systems with electrospray ionization sources. To this end, in a first approach, the matrix effect has been evaluated in two ways: monitoring the signal of a compound (added to the mobile phase) during the entire chromatographic run, and by classical post-extraction addition. The study was focused on nine selected mycotoxins: aflatoxin B1, fumonisins B1, B2 and B3, ochratoxin A, deoxynivalenol, T-2 and HT-2 toxins and zearalenone in various sample extracts giving moderate to strong matrix effects (maize, compound feed, straw, spices). Although the permanent monitoring of a compound provided a qualitative way of evaluating the matrix effects at each retention time, we concluded that it was not adequate as a quantitative approach to correct for the matrix effect. Matrix effects measured by post-extraction addition showed that the strongest ion suppression occurred for the spices (up to -89%). Five different calibration approaches to compensate for matrix effects were compared: multi-level external calibration using isotopically labelled internal standards, multi-level and single level standard addition, and two ways of single-point internal calibration: one point isotopic internal calibration and isotope pattern deconvolution. In general, recoveries and precision meeting the European Union requirements could be achieved with all approaches, with the exception of the single level standard addition at levels too close to the concentration in the sample. When an isotopically labelled internal standard is not available, single-level standard addition is the most efficient option.
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Affiliation(s)
- N. Fabregat-Cabello
- Research Institute for Pesticides and Water, Universitat Jaume I, 12071, Castellón, Spain
| | - P. Zomer
- RIKILT Wageningen University and Research Centre, Akkermaalsbos 2, 6708 WB Wageningen, the Netherlands
| | - J.V. Sancho
- Research Institute for Pesticides and Water, Universitat Jaume I, 12071, Castellón, Spain
| | - A.F. Roig-Navarro
- Research Institute for Pesticides and Water, Universitat Jaume I, 12071, Castellón, Spain
| | - H.G.J. Mol
- RIKILT Wageningen University and Research Centre, Akkermaalsbos 2, 6708 WB Wageningen, the Netherlands
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15
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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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16
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Zou X, Chen C, Huang X, Chen X, Wang L, Xiong Y. Phage-free peptide ELISA for ochratoxin A detection based on biotinylated mimotope as a competing antigen. Talanta 2016; 146:394-400. [DOI: 10.1016/j.talanta.2015.08.049] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 08/20/2015] [Accepted: 08/24/2015] [Indexed: 10/23/2022]
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17
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Turner NW, Bramhmbhatt H, Szabo-Vezse M, Poma A, Coker R, Piletsky SA. Analytical methods for determination of mycotoxins: An update (2009-2014). Anal Chim Acta 2015; 901:12-33. [PMID: 26614054 DOI: 10.1016/j.aca.2015.10.013] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 09/30/2015] [Accepted: 10/09/2015] [Indexed: 12/25/2022]
Abstract
Mycotoxins are a problematic and toxic group of small organic molecules that are produced as secondary metabolites by several fungal species that colonise crops. They lead to contamination at both the field and postharvest stages of food production with a considerable range of foodstuffs affected, from coffee and cereals, to dried fruit and spices. With wide ranging structural diversity of mycotoxins, severe toxic effects caused by these molecules and their high chemical stability the requirement for robust and effective detection methods is clear. This paper builds on our previous review and summarises the most recent advances in this field, in the years 2009-2014 inclusive. This review summarises traditional methods such as chromatographic and immunochemical techniques, as well as newer approaches such as biosensors, and optical techniques which are becoming more prevalent. A section on sampling and sample treatment has been prepared to highlight the importance of this step in the analytical methods. We close with a look at emerging technologies that will bring effective and rapid analysis out of the laboratory and into the field.
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Affiliation(s)
- Nicholas W Turner
- Department of Life, Health and Chemical Sciences, The Open University, Milton Keynes, MK7 6AA, UK.
| | - Heli Bramhmbhatt
- Department of Life, Health and Chemical Sciences, The Open University, Milton Keynes, MK7 6AA, UK
| | - Monika Szabo-Vezse
- Department of Life, Health and Chemical Sciences, The Open University, Milton Keynes, MK7 6AA, UK; Toximet Ltd., ToxiMet Limited, 130 Abbott Drive, Kent Science Park, Sittingbourne, Kent, ME9 8AZ, UK
| | - Alessandro Poma
- Department of Life, Health and Chemical Sciences, The Open University, Milton Keynes, MK7 6AA, UK; Department of Chemistry, University College London, London, WC1H 0AJ, UK
| | - Raymond Coker
- Toximet Ltd., ToxiMet Limited, 130 Abbott Drive, Kent Science Park, Sittingbourne, Kent, ME9 8AZ, UK
| | - Sergey A Piletsky
- Department of Chemistry, University of Leicester, Leicester, LE1 7RH, UK
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18
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Recent developments in stable isotope dilution assays in mycotoxin analysis with special regard to Alternaria toxins. Anal Bioanal Chem 2015; 407:7563-77. [DOI: 10.1007/s00216-015-8904-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 06/22/2015] [Accepted: 07/06/2015] [Indexed: 01/10/2023]
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19
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Kim S, Lim H. Chemiluminescence immunoassay using magnetic nanoparticles with targeted inhibition for the determination of ochratoxin A. Talanta 2015; 140:183-188. [DOI: 10.1016/j.talanta.2015.03.044] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/19/2015] [Accepted: 03/21/2015] [Indexed: 01/16/2023]
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20
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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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