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Li M, Qiu Y, Liu G, Xiao Y, Tian Y, Fang S. Plasmonic colorimetry and G-quadruplex fluorescence-based aptasensor: A dual-mode, protein-free and label-free detection for OTA. Food Chem 2024; 448:139115. [PMID: 38552466 DOI: 10.1016/j.foodchem.2024.139115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/18/2024] [Accepted: 03/20/2024] [Indexed: 04/24/2024]
Abstract
G-quadruplexes (G4) have received significant attention in the field of aptasensors owing to their unique physicochemical characteristics. A dual-mode, protein-free and label-free aptamer sensor based on plasmonic colorimetry and G4 fluorescence (PC@GF-aptasensor) was proposed for ochratoxin A (OTA). Colorimetry mode was achieved through the surface plasmon resonance (SPR) effect, which related to the OTA-Apt-based G4-OTA. The fluorescence mode was reflected by the insertion of thioflavin T (ThT) into G4-OTA. The OTA could be interpreted via three readouts: (1) naked eye (LOD of 2.0 ng mL-1), (2) smartphone (LOD of 1.65 ng mL-1), and (3) spectrofluorometer (LOD of 0.93 ng mL-1). The PC@GF-aptasensor exhibited several advantages, such as a standardised recognition group, simplified operation, low background signal, and practicality. The proposed PC@GF-aptasensor integrated SPR-based multicolour interpretation and ThT-inserted fluorescence reflection to obtain a dual-mode optical biosensor, which may provide valuable insights for the development of other targets with G4-based aptamers.
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Affiliation(s)
- Ming Li
- School of Emergency Management, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China.
| | - Youxin Qiu
- School of Emergency Management, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Guoxing Liu
- School of Emergency Management, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Yu Xiao
- School of Emergency Management, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China; Laboratory of Tobacco Quality and Safety Risk Assessment, Ministry of Agriculture and Rural Affairs, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, PR China
| | - Ye Tian
- School of Emergency Management, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Song Fang
- Laboratory of Tobacco Quality and Safety Risk Assessment, Ministry of Agriculture and Rural Affairs, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, PR China.
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Guo L, Cui Z, Xue J, Zhang Y, Yang H, Miao M. Cascade signal amplification electrochemical biosensor based on AgNPs and ring opening polymerization for determination of Ochratoxin A. Mikrochim Acta 2023; 190:432. [PMID: 37806989 DOI: 10.1007/s00604-023-06001-9] [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: 07/14/2023] [Accepted: 09/14/2023] [Indexed: 10/10/2023]
Abstract
An ochratoxin A (OTA) electrochemical biosensor based on a cascade signal amplification strategy with Ag nanoparticles (AgNPs) and ring opening polymerization (ROP) was constructed. The large specific surface area of AgNPs was used to increase the loading of OTA aptamer on the electrode surface, enhancing the ability to capture OTA as a way to achieve the first signal amplification. The OTA antibody modified with polyethylenimine specifically recognizes the OTA, forming an aptamer-OTA-antibody sandwich structure. The amino group on polyethylenimine initiates the ROP reaction with α-amino acid-n-carboxylic anhydride-ferrocene (NCA-Fc) as the monomer. A large number of electrochemical signal units of ferrocene are introduced into the sensing system for a second signal amplification. By amplifying the signal twice, the sensitivity of the sensor is improved. Under the optimal conditions, the detection range of the sensor is 1 pg·mL-1 ~ 1 μg·mL-1, while the detection limit is as low as 117 fg·mL-1. Moreover, the sensor has the advantages of high sensitivity, good stability and selectivity. Standard addition recovery experiment proved that the sensing system can be successfully used for the detection of OTA in four actual samples with recoveries in the range 90.0 to 113% with RSDs of 0.6 to 5.2%, providing a new idea for the pollution assessment of mycotoxins.
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Affiliation(s)
- Liang Guo
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Zhenzhen Cui
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Jinyan Xue
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Yuting Zhang
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Huaixia Yang
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China.
| | - Mingsan Miao
- School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China.
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Qiu Y, Liu Z, Mao Y, Teng W, Li M. DNA-bridged double gold nanoparticles-based immunochromatography for dual-mode detection of ochratoxin A. J Food Sci 2023; 88:4316-4326. [PMID: 37732469 DOI: 10.1111/1750-3841.16763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 08/13/2023] [Accepted: 08/21/2023] [Indexed: 09/22/2023]
Abstract
A novel immunochromatography strip (ICS) based on the DNA-bridged double gold nanoparticles was established and evaluated for the dual-mode detection of ochratoxin A (OTA). For this purpose, the streptavidin was coupled with the big size of gold nanoparticle (40 nm, AuNP), the OTA monoclonal antibody and biotinylated DNA-SH were simultaneously immobilized on the small size of AuNP (20 nm), and then the enhanced ICS was self-assembled and evaluated. The dual-mode detection of semi-quantification and quantification had been achieved and performed by the proposed ICS. The LOD for semi-quantification (semi-Q-LOD) was 0.06 ng/mL by the directly naked eye (eightfold enhanced than conventional ICS). By the on-site reader, the LOD for quantification (Q-LOD) was 0.03 ng/mL (threefold enhanced), with the detection range between 0.03 and 1.2 ng/mL. The specificity, reliability, and practicability had been well represented. Furthermore, the OTA-positive results of the enhanced ICS method correlated well with those obtained by the referenced HPLC-MS/MS for the market samples. This study provided a new ICS pattern of semi-quantification and quantification for OTA contamination, which could be used as a valuable reference for improving the ICS technology and enhancing the sensitivity.
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Affiliation(s)
- Youxin Qiu
- School of the Environment and Safety Engineering, Institute of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang, P. R. China
| | - Zhaoying Liu
- School of the Environment and Safety Engineering, Institute of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang, P. R. China
| | - Yuhao Mao
- School of the Environment and Safety Engineering, Institute of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang, P. R. China
| | - Weipeng Teng
- School of the Environment and Safety Engineering, Institute of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang, P. R. China
| | - Ming Li
- School of the Environment and Safety Engineering, Institute of Environmental Health and Ecological Security, Jiangsu University, Zhenjiang, P. R. China
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, P. R. China
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Liu X, Li J, Huang Y, Zhang Z, Lin Q, Xia P, Kong F, Qiu J, Fang S, Hua X. Rapid and sensitive detection of quizalofop-p-ethyl by gold nanoparticle-based lateral flow immunoassay in agriproducts and environmental samples. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159427. [PMID: 36244486 DOI: 10.1016/j.scitotenv.2022.159427] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Quizalofop-p-ethyl is a widely used herbicide that poses a threat to human health and environmental safety. In this study, anti-quizalofop-p-ethyl monoclonal antibodies (mAbs) were prepared and used to develop a gold nanoparticle-based lateral flow immunoassay (AuNP-LFIA) for the detection of quizalofop-p-ethyl in agriproducts and environmental samples. Four hybridoma cell lines were obtained, among which 5B6D10E11 secreted mAb with the highest sensitivity, with a 50 % inhibition concentration of 4.57 ng/mL in the indirect competitive enzyme-linked immunosorbent assay. After optimization, the AuNP-LFIA strip based on the mAb (5B6D10E11) showed a visual detection limit of 10 ng/mL, and the results could be directly determined by the naked eye within 8 min. The cross-reactivity of the AuNP-LFIA for analogs of quizalofop-p-ethyl was negligible except for quizalofop-p-acid. The established AuNP-LFIA was proven to be accurate and precise based on the recovery test. Furthermore, the detection results of AuNP-LFIA were consistent with those of ultra-high-performance liquid chromatography tandem mass spectrometry.
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Affiliation(s)
- Xue Liu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Jiao Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Yue Huang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhongrong Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Qing Lin
- Nanping Tobacco Company of Fujian Province, Nanping 353000, China
| | - Pengliang Xia
- Hubei Province Tobacco Companies Enshi State Company, Enshi 445000, China
| | - Fanyu Kong
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Jun Qiu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Song Fang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
| | - Xiude Hua
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
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Li M, Lu W, Mao Y, Qiu X, Du D. An enhanced immunochromatography assay based on gold growth on the surface of E. coli carrier for the simultaneous detection of mycotoxins. Talanta 2022; 251:123798. [DOI: 10.1016/j.talanta.2022.123798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/22/2022] [Accepted: 07/28/2022] [Indexed: 10/16/2022]
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Li M, Han C, Yang C, Sun M, Duan J, Qiu X, Du D. Ultrasensitive fluorometric oligonucleotide immunoassay for the simultaneous and efficient detection of two mycotoxins in agricultural products. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2108-2116. [PMID: 35583257 DOI: 10.1039/d2ay00367h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
An ultrasensitive fluorometric oligonucleotide immunoassay (UFOIA) based on a fluorometric oligonucleotide and magnetic separation was proposed for the simultaneous detection of two mycotoxins. Two kinds of magnetic nanoparticle (MNP) probes and their corresponding fluorometric oligonucleotide probes were prepared. After the immune reaction, Cy5-linked and 6-FAM-linked oligonucleotides were dissociated and applied to detect fluorescence signals simultaneously. Under optimal conditions, the detection ranges of the UFOIA were in the range of 0.654-1438.8 pg mL-1 for zearalenone (ZEN) and 0.215-3190.1 pg mL-1 for aflatoxin B1 (AFB1). The limits of detection (LODs) were 0.378 pg mL-1 for ZEN and 0.043 pg mL-1 for AFB1, which showed improved sensitivities of 529-fold and 112-fold compared to those from the ELISA. The positive results of the UFOIA for authentic agricultural products were highly correlated with those from LC-MS/MS. The specificity, accuracy, precision and reliability of the UFOIA are well demonstrated. The proposed UFOIA method achieved the simultaneous and ultrasensitive detection of mycotoxins at the pg mL-1 level, which was a considerable improvement. This study might provide an alternative approach for detecting multi-component contamination equipped with the notable highlights of ultrasensitivity, simultaneity, simplicity, high efficiency and a low background signal.
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Affiliation(s)
- Ming Li
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
| | - Chenfei Han
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Chuqin Yang
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Mingna Sun
- Institute of Plant Protection and Agro-Product Safety, Anhui Academy of Agricultural Sciences, Key Laboratory of Agro-Product Safety Risk Evaluation, Ministry of Agriculture, South Road of Agricultural Science 40, Hefei 230031, China.
| | - Jinsheng Duan
- Institute of Plant Protection and Agro-Product Safety, Anhui Academy of Agricultural Sciences, Key Laboratory of Agro-Product Safety Risk Evaluation, Ministry of Agriculture, South Road of Agricultural Science 40, Hefei 230031, China.
| | - Xuchun Qiu
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
| | - Daolin Du
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
- Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
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Ultrasensitive immuno-PCR for detecting aflatoxin B1 based on magnetic separation and barcode DNA. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Li M, Hong X, Qiu X, Yang C, Mao Y, Li Y, Liu Z, Du D. Ultrasensitive monitoring strategy of PCR-like levels for zearalenone contamination based DNA barcode. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:4490-4497. [PMID: 33448409 DOI: 10.1002/jsfa.11089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/05/2021] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The ultrasensitive monitoring strategy of zearalenone (ZEN) is essential and desirable for food safety and human health. In the present study, a coupling of gold nanoparticles-DNA barcode and direct competitive immunoassay-based real-time polymerase chain reaction signal amplification (RT-IPCR) for ZEN close to the sensitivity of PCR-like levels is described and evaluated. RESULTS The RT-IPCR benefited from the use of a DNA barcode and RT-PCR detection strategy, thus resulting in ultrasensitive and simple detection for ZEN. Under the optimal RT-IPCR, the linear range of detection was from 0.5 to 1000 pg mL-1 and the limit of detection was 0.5 pg mL-1 , which was 400-fold lower than the enzyme-linked immunosorbent assay. The detection procedure was simplified and the detection time was shortened. The specificity, accuracy and precision of the RT-IPCR confirmed a high performance. ZEN-positive contamination levels were from 0.056 to 152.12 ng g-1 by the RT-IPCR, which was demonstrated to be highly reliable by liquid chromatography-tandem mass spectrometry. CONCLUSION The proposed RT-IPCR could be used as an alternative for detecting ZEN with satisfactory ultrasensitivity, simplicity, low cost and high-throughput. The present study could provide a strategy for the ultrasensitive detection of the small molecule with a simple and practical approach, which has significant appeal and application prospects.
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Affiliation(s)
- Ming Li
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Xia Hong
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Xuchun Qiu
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Chuqin Yang
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Yuhao Mao
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Yan Li
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Zhenjiang Liu
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Daolin Du
- Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
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