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Lei X, Li P, Abd El-Aty AM, Zhao J, Xu L, Gao S, Li J, Zhao Y, She Y, Jin F, Wang J, Zheng L, Hammock BD, Jin M. Generation of a highly specific recombinant full-length antibody for detecting ethirimol in fruit and environmental water. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:134067. [PMID: 38513441 PMCID: PMC11062638 DOI: 10.1016/j.jhazmat.2024.134067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 03/03/2024] [Accepted: 03/16/2024] [Indexed: 03/23/2024]
Abstract
High-performance antibodies are core reagents for highly sensitive immunoassays. Herein, based on a novel hapten, a hybridoma secreting the high-affinity anti-ethirimol monoclonal antibody (mAb-14G5F6) was isolated with an IC50 value of 1.35 μg/L and cross-reactivity below 0.20% for 13 analogs. To further address the challenge of hybridoma preservation and antibody immortalization, a recombinant full-length antibody (rAb-14G5F6) was expressed using the HEK293(F) expression system based on the mAb-14G5F6 gene. The affinity, specificity, and tolerance of rAb-14G5F6, as characterized by indirect competitive enzyme-linked immunosorbent assay and noncompetitive surface plasmon resonance, exhibited high concordance with those of mAb-14G5F6. Further immunoassays based on rAb-14G5F6 were developed for irrigation water and strawberry fruit with limits of detection of 0.0066 and 0.036 mg/kg, respectively, recoveries of 80100%, and coefficients of variation below 10%. Furthermore, homology simulation and molecular docking revealed that GLU(L40), GLY(L107), GLY(H108), and ASP(H114) play important roles in forming hydrogen bonds and pi-anion ionic bonds between rAb-14G5F6 and ethirimol, resulting in the high specificity and affinity of rAb-14G5F6 for ethirimol, with a KD of 5.71 × 10-10 mol/L. Overall, a rAb specific for ethirimol was expressed successfully in this study, laying the groundwork for rAb-based immunoassays for monitoring fungicide residues in agricultural products and the environment.
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Affiliation(s)
- Xingmei Lei
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Peipei Li
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - A M Abd El-Aty
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt; Department of Medical Pharmacology, Medical Faculty, Ataturk University, Erzurum 25240, Turkey
| | - Jing Zhao
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Lingyuan Xu
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Song Gao
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jia Li
- Jinhua Miaozhidizhi Agricultural Technology Co., Ltd., Jinhua, Zhejiang 321000, China
| | - Yun Zhao
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yongxin She
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Fen Jin
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jing Wang
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Lufei Zheng
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Bruce D Hammock
- Department of Entomology & Nematology and the UC Davis Comprehensive Cancer Center, University of California, Davis, CA 95616, USA
| | - Maojun Jin
- Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Research Center of Quality Standards for Agro-Products, Ministry of Agriculture and Rural Affairs, Beijing 100081, China.
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Liu D, Zhang J, Gao Y, Hao H, Zhang C, Wang F, Zhang L. Synthesis, acaricidal activity, and structure-activity relationships of novel phenyl trifluoroethyl thioether derivatives containing substituted benzyl groups. PEST MANAGEMENT SCIENCE 2024; 80:544-553. [PMID: 37735842 DOI: 10.1002/ps.7780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 08/26/2023] [Accepted: 09/22/2023] [Indexed: 09/23/2023]
Abstract
BACKGROUND To discover and develop novel acaricidal compounds, a series of 2-fluoro-4-methyl/chlorine-5-((2,2,2-trifluoroethyl)thio)aniline/phenol compounds containing N/O-benzyl moieties were synthesized based on lead compound LZ-1. RESULTS The activity of these compounds against carmine spider mites (Tetranychus cinnabarinus) was determined using the leaf-spray method. Bioassays indicated that most of the designed target compounds possessed moderate to excellent acaricidal activity against adult T. cinnabarinus. The median lethal concentrations of 25b and 26b were 0.683 and 2.448 mg L-1 against adult mites, respectively; exceeding those of bifenazate (7.519 mg L-1 ) and lead compound LZ-1(3.658 mg L-1 ). Compound 25b exhibited 100% mortality in T. cinnabarinus larvae at 10 mg L-1 . CONCLUSION Continuing the study of these compounds in field trials, we compared the efficacy of mite killing by compound 25b with the commercial pesticide spirodiclofen and showed that mite control achieved 95.9% and 83.0% lethality at 10 and 22 days post-treatment. In comparison, spirodiclofen showed 92.7% lethality at 10 days and 77.2% lethality at 22 days post-treatment at a concentration of 100 mg L-1 . Results showed that 25b produced more facile and long-lasting control against T. cinnabarinus than the commercial acaricide spirodiclofen. Density functional theory analysis and electrostatic potential calculations of various molecular substitutions suggested some useful models to achieve other highly active miticidal compounds. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Dongdong Liu
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, China
- Institute of Functional Molecules, Shenyang University of Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Shenyang Key Laboratory of Targeted Pesticides, Shenyang, China
| | - Jing Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, China
- Institute of Functional Molecules, Shenyang University of Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Shenyang Key Laboratory of Targeted Pesticides, Shenyang, China
- Metisa Biotechnology Co., Ltd., Nanning, China
| | - Yixing Gao
- Institute of Functional Molecules, Shenyang University of Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Shenyang Key Laboratory of Targeted Pesticides, Shenyang, China
| | - Haijing Hao
- Institute of Functional Molecules, Shenyang University of Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Shenyang Key Laboratory of Targeted Pesticides, Shenyang, China
| | - Chenyang Zhang
- Institute of Functional Molecules, Shenyang University of Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Shenyang Key Laboratory of Targeted Pesticides, Shenyang, China
| | - Feng Wang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, China
- Institute of Functional Molecules, Shenyang University of Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Shenyang Key Laboratory of Targeted Pesticides, Shenyang, China
| | - Lixin Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, China
- Institute of Functional Molecules, Shenyang University of Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Shenyang Key Laboratory of Targeted Pesticides, Shenyang, China
- Metisa Biotechnology Co., Ltd., Nanning, China
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Kato R, Ito K, Sue K, Okumura H, Hattori T. Optical Sensing of Phenylurea Pesticides by Hydrogen Bonding with Carboxylate Dyess. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2059494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Ryo Kato
- Cooperative Research Facility Center, Toyohashi University of Technology, Toyohashi, Japan
| | - Kouta Ito
- Department of Electrical & Electronic Information Engineering, Toyohashi University of Technology, Toyohashi, Japan
| | - Koushiro Sue
- Department of Electrical & Electronic Information Engineering, Toyohashi University of Technology, Toyohashi, Japan
| | - Hiroki Okumura
- Department of Materials Science, Toyohashi University of Technology, Toyohashi, Japan
| | - Toshiaki Hattori
- Department of Electrical & Electronic Information Engineering, Toyohashi University of Technology, Toyohashi, Japan
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Liu XH, Wen YH, Cheng L, Xu TM, Wu NJ. Design, Synthesis, and Pesticidal Activities of Pyrimidin-4-amine Derivatives Bearing a 5-(Trifluoromethyl)-1,2,4-oxadiazole Moiety. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6968-6980. [PMID: 34137594 DOI: 10.1021/acs.jafc.1c00236] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
It is important to discover new pesticides with new modes of action because of the increasing evolution of pesticide resistance. In this study, a series of novel pyrimidin-4-amine derivatives containing a 5-(trifluoromethyl)-1,2,4-oxadiazole moiety were designed and synthesized. Their structures were confirmed by 1H NMR, 13C NMR, and HRMS. Bioassays indicated that the 29 compounds synthesized possessed excellent insecticidal activity against Mythimna separata, Aphis medicagini, and Tetranychus cinnabarinus and fungicidal activity against Pseudoperonospora cubensis. Among these pyrimidin-4-amine compounds, 5-chloro-N-(2-fluoro-4-(5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl)benzyl)-6-(1-fluoroethyl)pyrimidin-4-amine (U7) and 5-bromo-N-(2-fluoro-4-(5-(trifluoromethyl)-1,2,4-oxadiazol-3-yl)benzyl)-6-(1-fluoroethyl) pyrimidin-4-amine(U8) had broad-spectrum insecticidal and fungicidal activity. The LC50 values were 3.57 ± 0.42, 4.22 ± 0.47, and 3.14 ± 0.73 mg/L for U7, U8, and flufenerim against M. separata, respectively. The EC50 values were 24.94 ± 2.13, 30.79 ± 2.21, and 3.18 ± 0.21 mg/L for U7, U8, and azoxystrobin against P. cubensis, respectively. The AChE enzymatic activity testing revealed that the enzyme activities of compounds U7, U8, and flufenerim are 0.215, 0.184, and 0.184 U/mg prot, respectively. The molecular docking results of compounds U7, U8, and flufenerim with the AChE model demonstrated the opposite docking mode between compound U7 or U8 and positive control flufenerim in the active site of AChE. The structure-activity relationships are also discussed. This work provided excellent pesticide for further optimization. Density functional theory analysis can potentially be used to design more active compounds.
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Affiliation(s)
- Xing-Hai Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yong-Hui Wen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
- Zhejiang Base of National Southern Pesticide Research Centre, Zhejiang Research Institute of Chemical Industry, Hangzhou 310023, China
| | - Long Cheng
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
- Zhejiang Base of National Southern Pesticide Research Centre, Zhejiang Research Institute of Chemical Industry, Hangzhou 310023, China
| | - Tian-Ming Xu
- Zhejiang Base of National Southern Pesticide Research Centre, Zhejiang Research Institute of Chemical Industry, Hangzhou 310023, China
| | - Ning-Jie Wu
- Zhejiang Base of National Southern Pesticide Research Centre, Zhejiang Research Institute of Chemical Industry, Hangzhou 310023, China
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5
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Liu B, Qin Y, Cao M, Shi H, Li S, Sheng W, Wang S. A stable and sensitive enzyme-linked immunosorbent assay (ELISA) for the determination of metsulfuron-methyl residues in foods. J Food Sci 2021; 86:3176-3187. [PMID: 34176121 DOI: 10.1111/1750-3841.15683] [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: 02/17/2020] [Revised: 09/06/2020] [Accepted: 02/14/2021] [Indexed: 11/26/2022]
Abstract
A hapten of metsulfuron-methyl was successfully designed and synthesized from 2-methylester-phenylsulfonamide and succinic anhydride, and the polyclonal antibody against metsulfuron-methyl was prepared by immunization procedure with the hapten-bovine serum albumin conjugate. A stable and sensitive direct competitive enzyme-linked immunosorbent assay (dcELISA) method had been developed under the optimal conditions. The sensitivity (IC50 ) was 37.03 ± 1.87 µg/L, and the detection line (IC15 ) was 1.57 ± 0.11 µg/L. Rice, wheat, oat, flaxseed, milk, and water were chosen to study the recovery test and the recovery rates were 83.11%-117.44% . The matrix effect was eliminated by a simple dilution of the sample extracts. The results from dcELISA were well agreement with the results from HPLC-MS. It was indicated that the developed method had good accuracy and stability. It could be applied for the detection of metsulfuron-methyl residues. It was worth mentioning that the antibody could recognize metsulfuron-methyl and tribenuron-methyl with cross-reactivities of 100% and 49.72%, respectively. In order to understand the cross-reactivity, molecular modeling including molecular alignment and electrostatic potential surfaces were introduced. It was found that the special group of metsulfuron-methyl played an important role, especially on C3 position of the phenyl group. PRACTICAL APPLICATION: A stable, sensitive, and low-cost dc ELISA method had been developed with good accuracy and applied in the determination of metsulfuron-methyl in foods. Molecular simulation was introduced to understand the specificity between the antibody and the analyst. It was a good method to study the cross-reactivity between the antibody and the analyst or analogue.
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Affiliation(s)
- Bing Liu
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China.,Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science and Technology, Tianjin, China
| | - Yue Qin
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Meirong Cao
- Hebei Food Inspection and Research Institute, Hebei Food Safety Key Laboratory, Shijiazhuang, China
| | - Haipeng Shi
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Shijie Li
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
| | - Wei Sheng
- State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China.,Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science and Technology, Tianjin, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
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Zhu J, Li Q, Yu X, Zhang X, Li H, Wen K, Ke Y, Zhang S, Wang Z. Synthesis of hapten, production of monoclonal antibody, and development of immunoassay for ribavirin detection in chicken. J Food Sci 2021; 86:2851-2860. [PMID: 34146404 DOI: 10.1111/1750-3841.15789] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/08/2021] [Accepted: 04/27/2021] [Indexed: 12/21/2022]
Abstract
Ribavirin (RBV) is an effective antiviral drug, whose use is prohibited in animal husbandry worldwide. In this work, a novel immunizing hapten of RBV, named Hapten 4, was designed by comparing the conformational and electronic properties of RBV and haptens based on computational chemistry. Hapten 4 was synthesized and conjugated with carrier proteins to produce monoclonal antibody (mAb). The obtained mAb 4C3 for RBV exhibited an IC50 value of 6.24 ng/ml in an indirect competitive enzyme-linked immunosorbent assay (icELISA) and displayed no cross-reaction with five other antiviral drugs, including amantadine. The applicability of the developed icELISA was verified in chicken, with a calculated limit of detection of 4.23 µg/kg. The recoveries in spiked chicken were 79.2%-107.3% with a coefficient of variation less than 15.9%. The results indicated that the produced antibody from the new hapten was reliable and would be useful for RBV screening in chicken. PRACTICAL APPLICATION: RBV is a broad-spectrum antiviral drug, which is commonly used illegally in poultry farms. A high-affinity mAb 4C3 against RBV was produced and used to develop icELISA with acceptable sensitivity and accuracy. The constructed icELISA has excellent performance for detecting RBV residues in chicken.
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Affiliation(s)
- Jianyu Zhu
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Qiang Li
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Xuezhi Yu
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Xiya Zhang
- Henan Province Engineering Research Center for Food Safety Control of Processing and Circulation, College of Food Science and Technology, Henan Agricultural University, Zhengzhou, Henan, People's Republic of China
| | - Hongfang Li
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Kai Wen
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Yuebin Ke
- Department of Genetic Toxicology, Shenzhen Center for Disease Control and Prevention, People's Republic of China
| | - Suxia Zhang
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
| | - Zhanhui Wang
- College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing, People's Republic of China
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7
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Rapid Multi-Residue Detection Methods for Pesticides and Veterinary Drugs. Molecules 2020; 25:molecules25163590. [PMID: 32784605 PMCID: PMC7464912 DOI: 10.3390/molecules25163590] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/29/2020] [Accepted: 08/05/2020] [Indexed: 01/11/2023] Open
Abstract
The excessive use or abuse of pesticides and veterinary drugs leads to residues in food, which can threaten human health. Therefore, there is an extremely urgent need for multi-analyte analysis techniques for the detection of pesticide and veterinary drug residues, which can be applied as screening techniques for food safety monitoring and detection. Recent developments related to rapid multi-residue detection methods for pesticide and veterinary drug residues are reviewed herein. Methods based on different recognition elements or the inherent characteristics of pesticides and veterinary drugs are described in detail. The preparation and application of three broadly specific recognition elements-antibodies, aptamers, and molecular imprinted polymers-are summarized. Furthermore, enzymatic inhibition-based sensors, near-infrared spectroscopy, and SERS spectroscopy based on the inherent characteristics are also discussed. The aim of this review is to provide a useful reference for the further development of rapid multi-analyte analysis of pesticide and veterinary drug residues.
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Manonmani G, Sandhiya L, Senthilkumar K. Mechanism and kinetics of diuron oxidation by hydroxyl radical addition reaction. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:12080-12095. [PMID: 31983006 DOI: 10.1007/s11356-020-07806-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
Diuron is a phenyl urea herbicide used to control weeds in agricultural lands. The degradation of diuron in the atmosphere takes place dominantly via reaction with OH radicals. In this work, the OH addition reaction of diuron has been studied by using density functional theory methods M06-2X, ωB97X-D and MPWB1K with 6-31G(d,p) basis set. The calculated thermochemical parameters show that OH addition reaction occurs favourably at C2 position of diuron. The rate constant is calculated for the favourable initial reaction pathway by using canonical variational transition state theory with small curvature tunnelling (SCT) correction over the temperature range of 200-1000 K. The reaction of initially formed diuron-OH adduct intermediate with O2 leads to the formation of peroxy radical intermediate. The reaction of peroxy radical intermediate with HO2 and NOx (x = 1, 2) radicals is studied in detail. The results obtained from time-dependent density functional theory (TDDFT) calculations show that the intermediates and products formed from oxidation of diuron can be easily photolyzed in the sunlight. This study provides thermodynamical and kinetic data for the atmospheric oxidation of diuron by OH radical addition reaction and demonstrates the atmospheric chemistry of diuron and its derivatives.
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Affiliation(s)
| | - Lakshmanan Sandhiya
- National Institute of Science, Technology, and Development Studies, CSIR, New Delhi, 110012, India
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9
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Manonmani G, Sandhiya L, Senthilkumar K. Mechanism and Kinetics of Diuron Oxidation Initiated by Hydroxyl Radical: Hydrogen and Chlorine Atom Abstraction Reactions. J Phys Chem A 2019; 123:8954-8967. [DOI: 10.1021/acs.jpca.9b04800] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- G. Manonmani
- Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
| | - L. Sandhiya
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - K. Senthilkumar
- Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
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Layek S, Agrahari B, Dey S, Ganguly R, Pathak DD. Copper(II)-faciliated synthesis of substituted thioethers and 5-substituted 1H-tetrazoles: Experimental and theoretical studies. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.06.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Production of a specific monoclonal antibody and a sensitive immunoassay for the detection of diphacinone in biological samples. Anal Bioanal Chem 2019; 411:6755-6765. [DOI: 10.1007/s00216-019-02051-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/21/2019] [Accepted: 07/24/2019] [Indexed: 12/14/2022]
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12
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Yan Z, Liu A, Ou Y, Li J, Yi H, Zhang N, Liu M, Huang L, Ren J, Liu W, Hu A. Design, synthesis and fungicidal activity evaluation of novel pyrimidinamine derivatives containing phenyl-thiazole/oxazole moiety. Bioorg Med Chem 2019; 27:3218-3228. [DOI: 10.1016/j.bmc.2019.05.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 05/02/2019] [Accepted: 05/18/2019] [Indexed: 01/31/2023]
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13
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Guan T, Sun Y, Wang Y, Li Z, Li T, Hou L. Multi-Residue Method for the Analysis of Stilbene Estrogens in Milk. Int J Mol Sci 2019; 20:ijms20030744. [PMID: 30744198 PMCID: PMC6387142 DOI: 10.3390/ijms20030744] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 01/26/2019] [Accepted: 02/01/2019] [Indexed: 11/16/2022] Open
Abstract
The rapid analysis of stilbene estrogens is crucially important in the environment, food and health sectors, but quantitation of lower detection limit for stilbene estrogens persists as a severe challenge. We herein described a homologous and sensitive fluorescence polarization (FP) assay based on estrogen receptor α ligand binding domain (ER-LBD) to monitor stilbene estrogens in milk. Under optimal conditions, the half maximal inhibitory concentrations (IC50) of the FP assay were 9.27 nM, 12.94 nM, and 22.38 nM for hexestrol, dienestrol and diethylstilbestrol, respectively. And the corresponding limits of detection (LOD) values were 2.94 nM, 2.89 nM, and 3.12 nM. Finally, the assay was applied to determine the stilbenes in milk samples where the mean recoveries ranged from 95.76% to 112.78% and the coefficients of variation (CV) below 12.00%. Furtherly, we have focused our study on high cross-reactivity phenomena by using two in silico approaches, including molecular docking analysis and topology analysis. Overall, docking results show that several residues in the hydrophobic pocket produce hydrophobic interactions with the tested drug molecules, which contribute to the stability of their binding. In this paper, we conclude that the FP method is suitable for the rapid detection of stilbenes in milk samples, requiring no expensive analytical equipment or time-consuming sample preparation. This work offers a practical approach that applies bioscience technology in food safety testing and improves analytical speed and laboratory efficiency.
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Affiliation(s)
- Tianzhu Guan
- College of Food Science and Engineering, Jilin University, Changchun 130062, China.
| | - Yonghai Sun
- College of Food Science and Engineering, Jilin University, Changchun 130062, China.
| | - Yongjun Wang
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun 130033, China.
| | - Zhuolin Li
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun 130033, China.
| | - Tiezhu Li
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun 130033, China.
| | - Ligang Hou
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun 130033, China.
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Wang J, Peng T, Zhang X, Xie S, Zheng P, Yao K, Ke Y, Wang Z, Jiang H. Application of quantitative structure-activity relationship analysis on an antibody and alternariol-like compounds interaction study. J Mol Recognit 2019; 32:e2776. [PMID: 30663161 DOI: 10.1002/jmr.2776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/23/2018] [Accepted: 12/24/2018] [Indexed: 11/06/2022]
Abstract
The antigen-antibody interaction determines the sensitivity and specificity of competitive immunoassay for hapten detection. In this paper, the specificity of a monoclonal antibody against alternariol-like compounds was evaluated through indirect competitive ELISA. The results showed that the antibody had cross-reactivity with 33 compounds with the binding affinity (expressed by IC50 ) ranging from 9.4 ng/mL to 12.0 μg/mL. All the 33 compounds contained a common moiety and similar substituents. To understand how this common moiety and substituents affected the recognition ability of the antibody, a three-dimensional quantitative structure-activity relationship (3D-QSAR) between the antibody and the 33 alternariol-like compounds was constructed using comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) methods. The q2 values of the CoMFA and CoMSIA models were 0.785 and 0.782, respectively, and the r2 values were 0.911 and 0.988, respectively, indicating that the models had good predictive ability. The results of 3D-QSAR showed that the most important factor affecting antibody recognition was the hydrogen bond mainly formed by the hydroxyl group of alternariol, followed by the hydrophobic force mainly formed by the methyl group. This study provides a reference for the design of new hapten and the mechanisms for antibody recognition.
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Affiliation(s)
- Jianyi Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing, People's Republic of China
| | - Tao Peng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing, People's Republic of China
| | - Xiya Zhang
- College of Food Science and Technology, Henan Agricultural University, Henan, People's Republic of China
| | - Sanlei Xie
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing, People's Republic of China
| | - Pimiao Zheng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing, People's Republic of China
| | - Kai Yao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing, People's Republic of China
| | - Yuebin Ke
- Key Laboratory of Molecular Biology, Shenzhen Center for Disease Control and Prevention, Shenzhen, People's Republic of China
| | - Zhanhui Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing, People's Republic of China
| | - Haiyang Jiang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, Beijing, People's Republic of China
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15
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Li H, Ma S, Zhang X, Li C, Dong B, Mujtaba MG, Wei Y, Liang X, Yu X, Wen K, Yu W, Shen J, Wang Z. Generic Hapten Synthesis, Broad-Specificity Monoclonal Antibodies Preparation, and Ultrasensitive ELISA for Five Antibacterial Synergists in Chicken and Milk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:11170-11179. [PMID: 30251847 DOI: 10.1021/acs.jafc.8b03834] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
An antibody with broad specificity and principally depending on hapten structure and size is a key reagent for developing a class-selective immunoassay. In the present study, three new generic haptens of antibacterial synergists (ASGs) were proposed using trimethoprim as the starting molecule. These haptens contained carboxyl groups on the meta position of trimethoxybenzene for conjugating to protein, while, the common moiety of ASGs, i.e., diaminopyrimidine, was intentionally and maximally exposed to the immune system in animals in order to induce antibodies with broad specificity against ASGs. Five monoclonal antibodies (mAbs) were finally obtained, and 5C4 from the hapten with a short spacer arm, named Hapten A, showed not only uniform broad specificity but also high affinity to all five ASGs. We further determined the possible recognition mechanism of mAbs in terms of conformational and electronic aspects. An indirect competitive ELISA (icELISA)-based 5C4 was established and exhibited IC50 values of 0.067-0.139 μg L-1 with cross-reactivity of 48.2%-418.7% for the five ASGs in buffer under optimal conditions. The calculated limits of detection of the icELISA for chicken and milk were 0.06-0.8 μg kg-1 and 0.05-0.6 μg L-1, respectively. The recoveries in spiked chicken and milk samples were 75.2%-101.4% with a coefficient of variation less than 14.3%. In summary, we have developed, for the first time, a rapid and reliable icELISA for ASGs with significantly improved sensitivity and class selectivity.
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Affiliation(s)
- Hongfang Li
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Shaoqin Ma
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Xiya Zhang
- College of Food Science and Technology , Henan Agricultural University , 450002 Zhengzhou , People's Republic of China
| | - Chenglong Li
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Baolei Dong
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Mari Ghulam Mujtaba
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Yujie Wei
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Xiao Liang
- College of Veterinary Medicine , Qingdao Agricultural University , 266109 Qingdao , People's Republic of China
| | - Xuezhi Yu
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Kai Wen
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Wenbo Yu
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Jianzhong Shen
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
| | - Zhanhui Wang
- Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety Beijing Laboratory for Food Quality and Safety, Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine , China Agricultural University , 100193 Beijing , People's Republic of China
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