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Identification and Application of Two Promising Peptide Ligands for the Immunodetection of Imidacloprid Residue. Foods 2022. [PMCID: PMC9602300 DOI: 10.3390/foods11203163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
As the most widely used neonicotinoid insecticide, it is of great significance to explore the immunoreagents and immunoassays for imidacloprid (IMI) residue. In immunoassays, specific peptide ligands, such as peptidomimetic and anti-immunocomplex peptides, are regarded as promising substitutes for chemical haptens. In the present work, we identified thirty sequences of peptidomimetics and two sequences of anti-immunocomplex peptides for IMI from three phage pVIII display cyclic peptide libraries, in which the anti-immunocomplex peptides are the first reported noncompetitive reagents for IMI. The peptidomimetic 1-9-H and anti-immunocomplex peptide 2-1-H that showed the best sensitivity were utilized to develop competitive and noncompetitive phage enzyme-linked immunosorbent assays (P-ELISAs), with a half inhibition concentration of 0.55 ng/mL for competitive P-ELISA and a half-saturation concentration of 0.35 ng/mL for noncompetitive P-ELISA. The anti-immunocomplex peptide was demonstrated to greatly improve the specificity compared with competitive P-ELISA. In addition, the accuracy of proposed P-ELISAs was confirmed by recovery analysis and HPLC verification in agricultural and environmental samples. These results show that the peptide ligands identified from phage display library can replace chemical haptens in the immunoassays of IMI with the satisfactory performance.
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Kong T, Bai DY, Liu ZH, Ma YB, Zhang C, Wang GY, Zhang SH. Rapid and sensitive detection of metal chelator ethylenediamine tetraacetic acid. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chen H, Sun W, Zhang Z, Tao Z, Qin Y, Ding Y, Wang L, Wang M, Hua X. Competitive immune-nanoplatforms with positive readout for the rapid detection of imidacloprid using gold nanoparticles. Mikrochim Acta 2021; 188:356. [PMID: 34585287 DOI: 10.1007/s00604-021-05027-1] [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: 07/14/2021] [Accepted: 09/11/2021] [Indexed: 10/20/2022]
Abstract
Two high-sensitivity competitive immune-nanoplatforms based on the inner filter effect (IFE-IN) and magnetic separation (MS-IN) with a positive readout were developed to rapidly detect imidacloprid (IMI) using gold nanoparticles (AuNPs). For IFE-IN, IMI competes with AuNPs-labeled IMI antigens (IMI-BSA-AuNPs) to bind with anti-IMI monoclonal antibody (mAb)-conjugated NaYF4:Yb,Er upconversion nanoparticles, which changes the fluorescence signal at excitation/emission wavelength of 980/544 nm. For MS-IN, the immunocomplex of IMI-BSA-AuNPs and magnetic-nanoparticles-labeled mAb (mAb-MNPs) dissociates in the presence of IMI, and the optical density of IMI-BSA-AuNPs at 525 nm increases with the IMI concentration after magnetic separation. Under the optimal conditions, the IMI concentration producing a 50% saturation of the signal (SC50) and linear range (SC10- SC90) were found to be 4.30 ng mL-1 and 0.47 - 21.37 ng mL-1 for IFE-IN, while 1.21 ng mL-1 and 0.07 - 10.21 ng mL-1 for MS-IN, respectively. Both IFE-IN and MS-IN achieved excellent accuracy for the detection of IMI in different matrices. The quantities of IMI in apple samples detected by IFE-IN and MS-IN were consistent with the high-performance liquid chromatography results. For IFE-IN, analyte competes with AuNPs-labeled-antigen to bind with the mAb-conjugated-UCNPs, which changes the fluorescence signal at 544 nm. For MS-IN, the immunocomplex of AuNPs-labeled-antigen and mAb-conjugated-MNPs dissociates in the presence of analyte, and the optical density of AuNPs-labeled-antigen at 525 nm increases with increasing analyte concentration after separation.
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Affiliation(s)
- He Chen
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Wanlin Sun
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Zhongrong Zhang
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Zhexuan Tao
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Yuling Qin
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Yuan Ding
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Limin Wang
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Minghua Wang
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China
| | - Xiude Hua
- College of Plant Protection, Nanjing Agriculture University, Nanjing, 210095, China.
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Zhou L, Yang J, Tao Z, Eremin SA, Hua X, Wang M. Development of Fluorescence Polarization Immunoassay for Imidacloprid in Environmental and Agricultural Samples. Front Chem 2020; 8:615594. [PMID: 33344425 PMCID: PMC7738439 DOI: 10.3389/fchem.2020.615594] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/09/2020] [Indexed: 11/13/2022] Open
Abstract
A fluorescence polarization immunoassay (FPIA) for the determination of imidacloprid (IMI) was developed with advantages of simple operation and short assay time. The haptens of IMI, acetamiprid (ACE), and thiamethoxam (THI) were conjugated with fluorescein isothiocyanate ethylenediamine (EDF) and 4'-Aminomethyl fluorescein (AMF), respectively, to prepare six fluorescence tracers. The conjugation of IMI hapten and EDF (IMI-EDF) was selected to develop the FPIA due to the largest fluorescent polarization value increase in the presence of anti-IMI monoclonal antibody. Under the optimum condition, the limit of detection, 50% inhibition concentration and detection range of the FPIA were 1.7, 4.8, and 1.7-16.3 μg/L, respectively. The cross-reactivities (CRs) with the analogs of IMI were negligible except for imidaclothiz with CR of 79.13%. The average recovery of spiked paddy water, corn and cucumber samples were 82.4-118.5% with the RSDs of 7.0-15.9%, which indicated the FPIA had good accuracy. Thus, the developed FPIA was a potential tool for the rapid and accurate determination of IMI in agricultural and environmental samples.
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Affiliation(s)
- Liangliang Zhou
- Department of Pesticide Science, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Ministry of Education, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Jiachuan Yang
- Department of Pesticide Science, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Ministry of Education, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Zhexuan Tao
- Department of Pesticide Science, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Ministry of Education, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Sergei A. Eremin
- Chemical Faculty, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Xiude Hua
- Department of Pesticide Science, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Ministry of Education, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Minghua Wang
- Department of Pesticide Science, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Ministry of Education, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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Du M, Yang Q, Liu W, Ding Y, Chen H, Hua X, Wang M. Development of immunoassays with high sensitivity for detecting imidacloprid in environment and agro-products using phage-borne peptides. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 723:137909. [PMID: 32222498 DOI: 10.1016/j.scitotenv.2020.137909] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/22/2020] [Accepted: 03/11/2020] [Indexed: 06/10/2023]
Abstract
Imidacloprid is the most widely used neonicotinoid insecticide and has been reported to pose a threat to ecological security and human health. Therefore, simple-to-operate and highly sensitive methods for the detection of trace levels of imidacloprid are necessary. Here, we isolated two phage-borne peptides that compete with imidacloprid to bind the monoclonal antibody (mAb) 3D11 from phage display peptide libraries. A phage-enzyme-linked immunosorbent assay (P-ELISA) and two phage time-resolved fluoroimmunoassays (P-TRFIAs) for the detection of imidacloprid were developed using the phage-borne peptides as substitutes for chemically synthesized antigens. After systematic optimization, the half-maximum inhibition concentrations (IC50) of the P-ELISA, P-TRFIA-1, and P-TRFIA-2 were 0.067 ng mL-1, 0.085 ng mL-1, and 0.056 ng mL-1, respectively. Based on their IC50 values, the sensitivities of the P-ELISA and P-TRFIAs were more than four times greater than those of previous immunoassays. Additionally, the immunoassays showed satisfactory recovery in the detection of spiked samples and good correlation with high performance liquid chromatography (HPLC) for the detection of samples containing incurred residues.
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Affiliation(s)
- Mei Du
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - Qian Yang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - Weimei Liu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - Yuan Ding
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - He Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - Xiude Hua
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
| | - Minghua Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
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Tao Z, Deng J, Wang Y, Chen H, Ding Y, Hua X, Wang M. Competitive immunoassay for simultaneous detection of imidacloprid and thiacloprid by upconversion nanoparticles and magnetic nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:23471-23479. [PMID: 31197672 DOI: 10.1007/s11356-019-05635-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 05/29/2019] [Indexed: 06/09/2023]
Abstract
A rapid and sensitive immunoassay for the simultaneous detection of imidacloprid and thiacloprid was developed by using magnetic nanoparticles (MNPs) and upconversion nanoparticles (UCNPs). The UCNPs of NaYF4:Yb, Er and NaYF4:Yb, Tm were synthesized and conjugated with anti-imidacloprid monoclonal antibody (mAb) and anti-thiacloprid mAb as signal labels, while the MNPs were conjugated with antigens of thiacloprid and imidacloprid as separation elements. The fluorescence intensities of Yb/Er- and Yb/Tm-doped UCNPs were detected simultaneously in 544 nm and 477 nm under the excitation of NIR light (980 nm). The amounts of mAb-conjugated UCNPs that were separated by antigen-conjugated MNPs were determined based on competitive immunoassays. Under the optimal conditions, the 50% inhibiting concentration (IC50) and limit of detection (LOD, IC10) were 5.80 and 0.32 ng/mL for imidacloprid and 6.45 and 0.61 ng/mL for thiacloprid, respectively. The immunoassay exhibited negligible cross-reactivity with analogs of imidacloprid and thiacloprid except imidaclothiz (86.2%). The average recoveries of imidacloprid and thiacloprid in environmental and agricultural samples, including paddy water, soil, pears, oranges, cucumbers, and wheat, ranged from 78.4 to 105.9% with relative standard deviations (RSDs) of 2.1-11.9% for imidacloprid and ranged from 82.5 to 102.3% with RSDs of 1.0-16.5% for thiacloprid. In addition, the results of the immunoassay correlated well with high-performance liquid chromatography for the detection of the authentic samples.
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Affiliation(s)
- Zhexuan Tao
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Jiaqi Deng
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Yan Wang
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - He Chen
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Yuan Ding
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Xiude Hua
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Minghua Wang
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, Jiangsu Province, China.
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Huang Z, Hu S, Xiong Y, Wei H, Xu H, Duan H, Lai W. Application and development of superparamagnetic nanoparticles in sample pretreatment and immunochromatographic assay. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.03.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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