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Zhang B, Li S, Dong F, Xu J, Wu X, Zheng Y, Pan X. A sensitive fluoroimmunoassay for quantitative detection of imidacloprid based on quantum dot-streptavidin conjugate. Talanta 2024; 275:126128. [PMID: 38657361 DOI: 10.1016/j.talanta.2024.126128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 03/07/2024] [Accepted: 04/17/2024] [Indexed: 04/26/2024]
Abstract
Imidacloprid (IMI), the most commonly used neonicotinoid, is widely present in both the environment and agro-products due to extensive and prolonged application, posing potential risks to ecological security and human health. This study introduced a sensitive and rapid fluorescence-linked immunosorbent assay, employing Quantum Dot-Streptavidin conjugate (QDs-SA-FLISA), for efficient monitoring of IMI residues in agro-products. Under optimized conditions, the QDs-SA-FLISA exhibited a half-maximal inhibition concentration (IC50) of 1.70 ng/mL and a limit of detection (LOD, IC20) of 0.5 ng/mL. Investigation into the sensitivity enhancement effect of the QDs-SA revealed that the sensitivity (IC50) of the QDs-SA-FLISA was 7.3 times higher than that of ELISA. The recoveries and relative standard deviation (RSD) ranged from 81.7 to 118.1 % and 0.5-9.4 %, respectively, for IMI in brown rice, tomato and pear. There was no significant difference in IMI residues obtained between QDs-SA-FLISA and UHPLC-MS/MS. Thus, the QDs-SA-FLISA represents a reliable approach for the quantitative determination of IMI in agro-products.
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Affiliation(s)
- Binbin Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Shi Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Fengshou Dong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Jun Xu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Xiaohu Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Yongquan Zheng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Xinglu Pan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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Dang M, Wu L, Jin G, Yang C, Isah MB, Zhang X. Quantum Dot-Based Immunoassays: Unraveling Sensitivity Discrepancies and Charting Future Frontiers. Anal Chem 2024; 96:980-984. [PMID: 38194441 DOI: 10.1021/acs.analchem.3c04791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
The 2023 Nobel Prize in Chemistry honors the groundbreaking contributions of Alexei Ekimov, Louis Brus, and Moungi Bawendi to the field of quantum dots (QDs). In this spirit, we developed a direct competitive QD fluorescence immunoassay (dc-QD-FLISA) to detect aristolochic acid type I (AAI), a potent carcinogen found in herbal remedies. Unexpectedly, the dc-QD-FLISA exhibited lower sensitivity than that of an indirect competitive enzyme-linked immunosorbent assay (ic-ELISA), contrary to our initial expectations. This discrepancy in the sensitivity prompted a comprehensive analysis of the entire experimental process. We propose that steric hindrance between QDs and antigen-binding sites on antibodies may significantly diminish the binding efficiency, reducing sensitivity within the dc-QD-FLISA method. Furthermore, issues such as buffer conditions, antibody handling, and separation methods are also contributing factors. We recommend site-directed QD modification and stringent consideration of the experimental conditions. This study not only provides insights into QD-based immunoassays but also highlights the need for future advancements in immunoassay technology in terms of augmenting sensitivity and specificity, potentially revolutionizing disease diagnosis, biomarker discovery, and biomedical research.
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Affiliation(s)
- Mei Dang
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China
- Department of Biological Sciences, Faculty of Science, National University of Singapore, 10 Keng Ridge Crescent, 119260 Singapore
| | - Longjiang Wu
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China
| | - Gelin Jin
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China
| | - Chenxuan Yang
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China
| | - Murtala Bindawa Isah
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China
| | - Xiaoying Zhang
- College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, Shaanxi, China
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, N1G 2W1 Guelph, Ontario, Canada
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Wang Y, Ma D, Zhang G, Wang X, Zhou J, Chen Y, You X, Liang C, Qi Y, Li Y, Wang A. An Electrochemical Immunosensor Based on SPA and rGO-PEI-Ag-Nf for the Detection of Arsanilic Acid. Molecules 2021; 27:molecules27010172. [PMID: 35011402 PMCID: PMC8746453 DOI: 10.3390/molecules27010172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/19/2021] [Accepted: 12/21/2021] [Indexed: 12/02/2022] Open
Abstract
A sensitive electrochemical immunosensor was prepared for rapid detection of ASA based on arsanilic acid (ASA) monoclonal antibody with high affinity. In the preparation of nanomaterials, polyethyleneimine (PEI) improved the stability of the solution and acted as a reducing agent to generate reduced graphene oxide (rGO) with relatively strong conductivity, thereby promoting the transfer of electrons. The dual conductivity of rGO and silver nanoparticles (AgNPs) improved the sensitivity of the sensor. The synthesis of nanomaterials were confirmed by UV-Vis spectroscopy, X-ray diffraction, transmission electron microscopy and scanning electron microscopy. In the optimal experiment conditions, the sensor could achieve the detection range of 0.50–500 ng mL−1 and the limit of detection (LOD) of 0.38 ng mL−1 (S/N = 3). Moreover, the sensor exhibited excellent specificity and acceptable stability, suggesting that the proposed sensor possessed a good potential in ASA detection. Thus, the as-prepared biosensor may be a potential way for detecting other antibiotics in meat and animal-derived foods.
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Affiliation(s)
- Yanwei Wang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Dongdong Ma
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Gaiping Zhang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Xuannian Wang
- School of Life Science and Basic Medicine, Xinxiang University, Xinxiang 453003, China;
| | - Jingming Zhou
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Yumei Chen
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Xiaojuan You
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Chao Liang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Yanhua Qi
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Yuya Li
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
| | - Aiping Wang
- School of Life Science, Zhengzhou University, Zhengzhou 450000, China; (Y.W.); (D.M.); (G.Z.); (J.Z.); (Y.C.); (X.Y.); (C.L.); (Y.Q.); (Y.L.)
- Correspondence:
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Wang Y, Cao J, Sun Y, Xing Y, Pang X, Chen X, Fei P, Li Z, Cheng Q, Kang H, Hu X. Development and validation of a sensitive enzyme-linked immunosorbent assay for clonidine hydrochloride in pig urine and pork samples. FOOD AGR IMMUNOL 2021. [DOI: 10.1080/09540105.2021.2001439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Yao Wang
- College of Food and Bioengineering, Henan International Joint Laboratory of Food Green Processing and Quality Safety Control, Henan University of Science and Technology, Luoyang, People’s Republic of China
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Jinbo Cao
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
- College of Veterinary Medicine, Northwest A&F University, Yangling, People’s Republic of China
| | - Yaning Sun
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Yunrui Xing
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Xinghao Pang
- College of Food and Bioengineering, Henan International Joint Laboratory of Food Green Processing and Quality Safety Control, Henan University of Science and Technology, Luoyang, People’s Republic of China
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
| | - Xiujin Chen
- College of Food and Bioengineering, Henan International Joint Laboratory of Food Green Processing and Quality Safety Control, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - Peng Fei
- College of Food and Bioengineering, Henan International Joint Laboratory of Food Green Processing and Quality Safety Control, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - Zhaozhou Li
- College of Food and Bioengineering, Henan International Joint Laboratory of Food Green Processing and Quality Safety Control, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - Qiaofen Cheng
- Department of Food and Nutritional Sciences, University of Reading, Reading, UK
| | - Huaibin Kang
- College of Food and Bioengineering, Henan International Joint Laboratory of Food Green Processing and Quality Safety Control, Henan University of Science and Technology, Luoyang, People’s Republic of China
| | - Xiaofei Hu
- Henan Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou, People’s Republic of China
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