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Li Z, Wang Y, Vasylieva N, Wan D, Yin Z, Dong J, Hammock BD. An Ultrasensitive Bioluminescent Enzyme Immunoassay Based on Nanobody/Nanoluciferase Heptamer Fusion for the Detection of Tetrabromobisphenol A in Sediment. Anal Chem 2020; 92:10083-10090. [PMID: 32559059 DOI: 10.1021/acs.analchem.0c01908] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Tetrabromobisphenol A (TBBPA) is a flame retardant and has become a widely concerning environmental pollutant. An ultrasensitive nanobody-based immunoassay was developed to monitor the exposure of TBBPA in sediment. First, the anti-TBBPA nanobody was fused with nanoluciferase, and then a one-step bioluminescent enzyme immunoassay (BLEIA) was developed with high sensitivity for TBBPA, with a maximum half inhibition concentration (IC50) at 187 pg/mL. Although approximately 10-fold higher sensitivity can be achieved by this developed BLEIA than by the classical two-step ELISA (IC50 at 1778 pg/mL), it is still a challenge to detect trace TBBPA in sediment samples reliably due to the relatively high matrix effect. To further improve the performance of this one-step BLEIA, a C4b-binding protein (C4BP) was inserted as a self-assembling linker between the nanobody and nanoluciferase. Therefore, a heptamer fusion containing seven binders and seven tracers was generated. This reagent improved the binding capacity and signal amplification. The one-step heptamer plus BLEIA based on this immune-reagent shows an additional 7-fold improvement of sensitivity, with the IC50 of 28.9 pg/mL and the limit of detection as low as 2.5 pg/mL. The proposed assay was further applied to determine the trace TBBPA in sediment, and the recovery was within 92-103%. Taking advantage of this heptamer fusion, one-step BLEIA can serve as a powerful tool for fast detection of trace TBBPA in the sediment samples.
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Affiliation(s)
- Zhenfeng Li
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Yi Wang
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States.,Department of Pesticides Science, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China
| | - Natalia Vasylieva
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Debin Wan
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Zihan Yin
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
| | - Jiexian Dong
- Shenzhen Forward Pharma Co., Ltd., Shenzhen 518057, China
| | - Bruce D Hammock
- Department of Entomology and Nematology and UCD Comprehensive Cancer Center, University of California, Davis, California 95616, United States
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Watanabe E, Seike N, Motoki Y, Inao K, Otani T. Potential application of immunoassays for simple, rapid and quantitative detections of phytoavailable neonicotinoid insecticides in cropland soils. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 132:288-294. [PMID: 27344017 DOI: 10.1016/j.ecoenv.2016.06.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 06/15/2016] [Accepted: 06/15/2016] [Indexed: 06/06/2023]
Abstract
This study evaluated the applicability of commercially available kit-based enzyme-linked immunosorbent assay (ELISA) to simple, quick, and quantitative detection for three water-extractable (phytoavailable) neonicotinoid insecticides: dinotefuran, clothianidin, and imidacloprid in soils. ELISA showed excellent analytical sensitivity for determination, but with cross-reaction to structurally related neonicotinoid analogues, which might produce false positives. To analyze insecticides in soil samples of diverse physicochemical properties, they were extracted with water. The aqueous soil extracts were assayed directly with ELISA. No matrix interference was observed without additional dilution with water. Recovery experiments for the insecticides from aqueous soil extracts spiked at 2-10 ng/mL showed good accuracy (72-126%) and precision (<16%). Kit-based ELISAs were used to estimate soil-water distribution coefficients (Kd). Values estimated using this method showed positive correlation between organic carbon contents in soil and those for evaluated insecticides. Results indicate that the evaluated kit-based ELISA has applicability for simple, quick, and reliable detection of phytoavailable insecticides in soils and for estimating Kd values in soil.
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Affiliation(s)
- Eiki Watanabe
- National Institute for Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan.
| | - Nobuyasu Seike
- National Institute for Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan
| | - Yutaka Motoki
- National Institute for Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan
| | - Keiya Inao
- National Institute for Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan
| | - Takashi Otani
- National Institute for Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan
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Wongtangprasert T, Natakuathung W, Pimpitak U, Buakeaw A, Palaga T, Komolpis K, Khongchareonporn N. Production of a monoclonal antibody against oxytetracycline and its application for oxytetracycline residue detection in shrimp. J Zhejiang Univ Sci B 2014; 15:165-72. [PMID: 24510709 PMCID: PMC3924392 DOI: 10.1631/jzus.b1300181] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 10/25/2013] [Indexed: 11/11/2022]
Abstract
A novel monoclonal antibody (MAb) against oxytetracycline (OTC) was generated and characterized. The MAb was used in the development of an enzyme-linked immunosorbant assay (ELISA)-based detection system. An OTC-bovine serum albumin (BSA) conjugate was prepared and used in the immunization of mice. A conventional somatic cell fusion technique was used to generate MAb-secreting hybridomas denoted 2-4F, 7-3G, and 11-11A. An indirect competitive ELISA (icELISA) was applied to measure the sensitivity and specificity of each MAb in terms of its 50% inhibitory concentration (IC50) and percentage of cross-reactivity, respectively. MAb 2-4F exhibited the highest sensitivity, with an IC50 of 7.01 ng/ml. This MAb showed strong cross-reactivity to rolitetracycline, but no cross-reactivity to other unrelated antibiotics. When MAb 2-4F was used to detect OTC from shrimp samples, the recoveries were in the range of 82%-118% for an intra-assay and 96%-113% for an inter-assay. The coefficients of variation of the assays were 3.9%-13.9% and 5.5%-14.9%, respectively.
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Affiliation(s)
| | - Wirongrong Natakuathung
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Umaporn Pimpitak
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Anumart Buakeaw
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Tanapat Palaga
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kittinan Komolpis
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nanthika Khongchareonporn
- Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok 10330, Thailand
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Maloschik E, Ernst A, Hegedűs G, Darvas B, Székács A. Monitoring water-polluting pesticides in Hungary. Microchem J 2007. [DOI: 10.1016/j.microc.2006.05.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Tadeo JL, Sánchez-Brunete C, Albero B, González L. Analysis of Pesticide Residues in Juice and Beverages. Crit Rev Anal Chem 2004. [DOI: 10.1080/10408340490888670] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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José L, Sánchez-Brunete C, Albero B, González L. Analysis of Pesticide Residues in Juice and Beverages. Crit Rev Anal Chem 2004. [DOI: 10.1080/10408340490491887] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Dedos SG, Szurdoki F, Székács A, Mizoguchi A, Fugo H. Induction of dauer pupae by fenoxycarb in the silkworm, Bombyx mori. JOURNAL OF INSECT PHYSIOLOGY 2002; 48:857-865. [PMID: 12770048 DOI: 10.1016/s0022-1910(02)00155-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Topical application of fenoxycarb (1 &mgr;g per animal) at 129 or 132 h of the fifth instar larvae of the silkworm, Bombyx mori, did not induce morphological abnormalities in the pupal stage, but these animals became dauer (permanent) pupae. This condition of B. mori and the endocrine events leading to permanent pupae are discussed in this work. Application of fenoxycarb at 132 h of the fifth instar elicited a high ecdysteroid titre in the pharate pupal stage and a steadily high ecdysteroid titre in the pupal stage. The fenoxycarb-induced permanent pupae had non-degenerating prothoracic glands that secreted low amounts of ecdysteroid and did not respond to recombinant prothoracicotropic hormone (rPTTH) late in the pupal stage. The Bombyx PTTH titre in the haemolymph, determined by a time-resolved fluoroimmunoassay, was lower than that of controls at the time of pupal ecdysis, but higher than controls later in the pupal stage in fenoxycarb-treated animals. After application of fenoxycarb, its haemolymph level, measured by ELISA, reached a peak at pupal ecdysis, then remained low. These results suggest that the fenoxycarb-mediated induction of permanent pupae is only partially a brain-centred phenomenon. It also involves alterations in the hormonal interplay that govern both the initiation of pupal-adult differentiation and changes in the steroidogenic pathway of the prothoracic glands of B. mori.
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Affiliation(s)
- S G. Dedos
- Department of Biological Production, Tokyo University of Agriculture and Technology, Fuchu-shi, 183, Tokyo, Japan
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