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Yin Z, He Q, Yang H, Morisseau C, El-Sheikh ESA, Li D, Hammock BD. Development of a sandwich ELISA for the specific quantitation of hemagglutinin (HA)-tagged proteins during their inducible expression in Escherichia coli. Anal Bioanal Chem 2023; 415:5563-5574. [PMID: 37505234 PMCID: PMC10473979 DOI: 10.1007/s00216-023-04846-w] [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: 03/04/2023] [Revised: 06/29/2023] [Accepted: 07/04/2023] [Indexed: 07/29/2023]
Abstract
Heavy single-chain antibodies (VHH or nanobodies) are popular in the medical and analytical fields due to its small size, high solubility, stability, and other advantageous features. However, the usage of VHHs is limited by the low yield of its production and purification. In order to determine the optimal purification strategy for VHH to improve the yield, a method to monitor purification at the intermediate steps is needed. In this study, a simple, sensitive, low-cost sandwich enzyme-linked immunosorbent assay (ELISA) was developed to quantitate VHHs throughout the purification steps. Under optimized conditions, the assay has a sensitivity of 0.149 OD·mL/ng and a limit of detection (LOD) of 0.029 ng/mL. The average recoveries of the assay against the spiked samples were 101.9-106.0% and 100.7-108.0%. The method was applied to a variety of real samples for the detection of different VHHs in bacterial cell media. High amount of VHHs (up to 41.3 mg/mL), which are comparable to the average yield of VHH in standard production protocols, were detected in the media. This study raises attention to the problem of protein losses in cell culture supernatants and provides a method for the continuous detection of the protein abundance to optimize the expression and purification protocols especially for nanobodies.
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Affiliation(s)
- Zihan Yin
- Department of Entomology and Nematology, and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - Qiyi He
- Department of Entomology and Nematology, and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - Huiyi Yang
- Department of Entomology and Nematology, and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - Christophe Morisseau
- Department of Entomology and Nematology, and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - El-Sayed A El-Sheikh
- Plant Protection Department, Faculty of Agriculture, Zagazig University, Zagazig, 44511, Egypt
| | - Dongyang Li
- Department of Entomology and Nematology, and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA.
- Laboratory of Agricultural Information Intelligent Sensing, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
| | - Bruce D Hammock
- Department of Entomology and Nematology, and UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA.
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Xu N, Sun Y, Wang Y, Cui Y, Jiang Y, Zhang C. Hormesis effects in tomato plant growth and photosynthesis due to acephate exposure based on physiology and transcriptomic analysis. PEST MANAGEMENT SCIENCE 2023; 79:2029-2039. [PMID: 36693821 DOI: 10.1002/ps.7381] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 01/16/2023] [Accepted: 01/25/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Hormesis is a common phenomenon in toxicology described as low-dose stimulation due to a toxin which causes inhibition at a high dose. Pesticide hormesis in plants has attracted considerable research interest in recent years; however, the specific mechanism has not yet been clarified. Acephate is an organophosphorus insecticide that is used worldwide. Here, hormesis in tomato (Solanum lycopersicum L.) plant growth and photosynthesis after acephate exposure is confirmed, as stimulation occurred at low stress levels, whereas inhibition occurred after exposure to high concentrations. RESULTS We found that low acephate concentration (5-fold lower than recommended application dosage) could enhance chlorophyll biosynthesis and stimulate photosynthesis effects, and thus improve S. lycopersicum growth. A high level of acephate (5-fold higher than recommended application dosage) stress inhibited chlorophyll accumulation, decreased photosystem II efficiency and blocked antioxidant reactions in leaves, increasing reactive oxygen species levels and damaging plant growth. Transcriptomic analysis and quantitative real-time PCR results revealed that the photosynthesis - antenna proteins pathway played a crucial role in the hormesis effect, and that LHCB7 as well as LHCP from the pathway were the most sensitive to acephate hormesis. CONCLUSION Our results showed that acephate could induce hormesis in tomato plant growth and photosynthesis, and that photosystem II and the photosynthesis - antenna proteins pathway played important roles in hormesis. These results provide novel insights into the scientific and safe application of chemical pesticides, and new guidance for investigation into utilizing pesticide hormesis in agriculture. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Nuo Xu
- Key Laboratory of Agri-Food Safety of Anhui Province, Anhui Agricultural University, Hefei, China
- College of Resources and Environment, Anhui Agricultural University, Hefei, China
| | - Yang Sun
- Anhui Province Key Laboratory of Crop Integrated Pest Management, School of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Yuru Wang
- Key Laboratory of Agri-Food Safety of Anhui Province, Anhui Agricultural University, Hefei, China
- College of Resources and Environment, Anhui Agricultural University, Hefei, China
| | - Yidi Cui
- Key Laboratory of Agri-Food Safety of Anhui Province, Anhui Agricultural University, Hefei, China
- College of Resources and Environment, Anhui Agricultural University, Hefei, China
| | - Yuanjin Jiang
- Key Laboratory of Agri-Food Safety of Anhui Province, Anhui Agricultural University, Hefei, China
- College of Resources and Environment, Anhui Agricultural University, Hefei, China
| | - Chao Zhang
- Key Laboratory of Agri-Food Safety of Anhui Province, Anhui Agricultural University, Hefei, China
- College of Resources and Environment, Anhui Agricultural University, Hefei, China
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3
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Shen H, Wan Y, Wu X, Zhang Y, Li J, Cui T, Sun H, Cui H, He K, Hui G, Chen X, Liu G, Du M. Hapten designs based on aldicarb for the development of a colloidal gold immunochromatographic quantitative test strip. Front Nutr 2022; 9:976284. [PMID: 36082035 PMCID: PMC9446148 DOI: 10.3389/fnut.2022.976284] [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] [Received: 06/23/2022] [Accepted: 08/01/2022] [Indexed: 12/01/2022] Open
Abstract
The common carbamate insecticide aldicarb is considered one of the most acutely toxic pesticides. Herein, rational design was used to synthesize two haptens with spacers of different carbon chain lengths. The haptens were then used to immunize mice. The antibodies obtained were evaluated systematically, and a colloidal gold immunochromatographic strip was developed based on an anti-aldicarb monoclonal antibody. The 50% inhibition concentration and linear range of anti-aldicarb monoclonal antibody immunized with Hapten 1 were 0.432 ng/mL and 0.106–1.757 ng/mL, respectively. The cross-reactivities for analogs of aldicarb were all <1%. The limit of detection of the colloidal gold immunochromatographic strip was 30 μg/kg, and the average recoveries of aldicarb ranged from 80.4 to 110.5% in spiked samples. In the analysis of spiked samples, the test strip could accurately identify positive samples detected by the instrumental method in the GB 23200.112-2018 standard but produced some false positives for negative samples. This assay provides a rapid and accurate preliminary screening method for the determination of aldicarb in agricultural products and environments.
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Affiliation(s)
- Hong Shen
- Biological Inspection Department, Zhejiang Institute for Food and Drug Control, Hangzhou, China
| | - Yuping Wan
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Xiaosheng Wu
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Yu Zhang
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Jingwen Li
- Beijing Center for Physical and Chemical Analysis, Institute of Analysis and Testing, Beijing Academy of Science and Technology, Beijing, China
| | - Tingting Cui
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Han Sun
- Biological Inspection Department, Zhejiang Institute for Food and Drug Control, Hangzhou, China
| | - Haifeng Cui
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Kailun He
- Biological Inspection Department, Zhejiang Institute for Food and Drug Control, Hangzhou, China
| | - Guangpeng Hui
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Xu Chen
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Guoqiang Liu
- Beijing Kwinbon Biotechnology Co., Ltd., Beijing, China
- Beijing Engineering Research Centre of Food Safety Immunodetection, Beijing, China
| | - Meihong Du
- Beijing Center for Physical and Chemical Analysis, Institute of Analysis and Testing, Beijing Academy of Science and Technology, Beijing, China
- *Correspondence: Meihong Du,
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Jara MDL, Alvarez LAC, Guimarães MCC, Antunes PWP, de Oliveira JP. Lateral flow assay applied to pesticides detection: recent trends and progress. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:46487-46508. [PMID: 35507227 PMCID: PMC9067001 DOI: 10.1007/s11356-022-20426-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
Devices based on lateral flow assay (LFA) have been gaining more and more space in the detection market mainly due to their simplicity, speed, and low cost. These devices have excellent sensing format versatility and make these strips an ideal choice for field applications. The COVID-19 pandemic boosted the democratization of this method as a "point of care testing" (POCT), and the trend is that these devices become protagonists for the monitoring of pesticides in the environment. However, designing LFA devices for detecting and monitoring pesticides in the environment is still a challenge. This is because analytes are small molecules and have only one antigenic determinant, which makes it difficult to apply direct immunoassays. Furthermore, most LFA devices provide only qualitative or semi-quantitative results and have a limited number of applications in multi-residue analysis. Here, we present the state of the art on the use of LFA in the environmental monitoring of pesticides. Based on well-documented results, we review all available LFA formats and strategies for pesticide detection, which may have important implications for the future of monitoring pesticides in the environment. The main advances, challenges, and perspectives of these devices for a direction in this field of study are also presented.
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Affiliation(s)
- Marcia Daniela Lazo Jara
- Department of Morphology, Federal University of Espirito Santo, Av Marechal Campos1468, Vitória, ES, 29.040-090, Brazil
| | | | - Marco C C Guimarães
- Department of Morphology, Federal University of Espirito Santo, Av Marechal Campos1468, Vitória, ES, 29.040-090, Brazil
| | - Paulo Wagnner Pereira Antunes
- Bioengen Consulting, Engineering and Environmental Planning, R. Belo Horizonte, Lote 05-Quadra W - Alterosas, Serra, ES, 29168-068, Brazil
| | - Jairo Pinto de Oliveira
- Department of Morphology, Federal University of Espirito Santo, Av Marechal Campos1468, Vitória, ES, 29.040-090, Brazil.
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5
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Chen YY, Bai YP, Li B, Zhao XB, Yang CJ, Liu YQ, Gao JM, Guo J, Li C, Peng JW, Zhao ZM, Zhang ZJ, Xu CR. Design and synthesis of novel 20(S)-α-aminophosphonate derivatives of camptothecin as potent antitumor agents. Bioorg Chem 2021; 114:105065. [PMID: 34174631 DOI: 10.1016/j.bioorg.2021.105065] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 04/20/2021] [Accepted: 06/04/2021] [Indexed: 12/17/2022]
Abstract
29 novel 20(S)-aminophosphonate derivatives of camptothecin were synthesized via a FeCl3 - catalyzed one-pot reaction. All of these compounds displayed similar or superior cytotoxic activity in comparison with that of Irinotecan against Hep3B, MCF-7, A-549, MDA-MB-231, KB, and multidrug-resistant (MDR) KB-vin cell lines. Out of them, compound B07 exhibited significant cytotoxicity and 10-fold improvement in activity compared to Irinotecan. Mechanistically, B07 not only induced cell apoptosis and cell cycle arrest in Hep3B and MCF-7 cells, but also inhibited Topoisomerase I activity in the cell and cell-free system in a manner similar to that of Irinotecan. In both xenograft and primary HCC mouse models, B07 showed significant anti-tumor activity and was more potent than Irinotecan. Additionally, the acute toxicity assay showed that B07 had no apparent toxicity to the mouse liver, kidney, and hemopoietic system of the FVB/N mice. Therefore, these findings indicate that compound B07 could be a potential Topoisomerase I poison drug candidate for further clinical trial.
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Affiliation(s)
- Yu-Yuan Chen
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Yin-Peng Bai
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Bin Li
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Xiao-Bo Zhao
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Cheng-Jie Yang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China.
| | - Jian-Mei Gao
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Jun Guo
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Chun Li
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
| | - Jing-Wen Peng
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Zhong-Min Zhao
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Zhi-Jun Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Chuan-Rui Xu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China.
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6
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Srivastava S, Ghorpade R, Sathe M. Development of Immunochromatographic Assay for Identification of Organophosphate Pesticides in Environmental Samples. J Immunoassay Immunochem 2015; 37:167-88. [PMID: 26516678 DOI: 10.1080/15321819.2015.1106948] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Microtiter plate enzyme linked immunoassay (ELISA) experiments in competitive format were performed utilizing polyclonal antibody for establishing a detection system for organophosphate pesticides. IC50 value of and limit of detection (LOD) value was determined by standard inhibition curve and value obtained were 0.05 μgmL(-1) and 0.001 μgmL(-1), respectively. Specificity of antibody was investigated with different organophosphate pesticides. Immunochromatographic assay (ICA) experiments were also designed in competitive format by making use of immunochromatographic strip which was assembly of three main components: conjugate pad, membrane and adsorbent pad. Membrane was coated with hapten-OVA conjugate (test line) and antirabbit IgG (control line). ICA experiments were performed by employing gold-labeled antibody as a detector reagent which was applied over conjugate pad. Visual detection limit obtained from ICA was 0.5 μgmL(-1). Major advantage of strip assay was rapid result, i.e., less than 10 min. which makes it suitable for onsite applications.
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Affiliation(s)
- Shruti Srivastava
- a Discovery Centre, Defence Research R & D Establishment , Gwalior , India
| | - Ramrao Ghorpade
- a Discovery Centre, Defence Research R & D Establishment , Gwalior , India
| | - Manisha Sathe
- a Discovery Centre, Defence Research R & D Establishment , Gwalior , India
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7
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Raghu P, Madhusudana Reddy T, Reddaiah K, Kumara Swamy B, Sreedhar M. Acetylcholinesterase based biosensor for monitoring of Malathion and Acephate in food samples: A voltammetric study. Food Chem 2014; 142:188-96. [DOI: 10.1016/j.foodchem.2013.07.047] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 07/08/2013] [Accepted: 07/10/2013] [Indexed: 10/26/2022]
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8
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Wang X, Zhang L, Li M, Xu Z. Synthesis of a Novel Imprinted Polymeric Material for Simultaneous Recognition of Methamidophos and Acephate. ADVANCES IN POLYMER TECHNOLOGY 2013. [DOI: 10.1002/adv.21357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xilong Wang
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an; 271018; People's Republic of China
| | - Limin Zhang
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an; 271018; People's Republic of China
| | - Mingxiao Li
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an; 271018; People's Republic of China
| | - Zhixiang Xu
- College of Food Science and Engineering; Shandong Agricultural University; Tai'an; 271018; People's Republic of China
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Determination of diniconazole in agricultural samples by sol-gel immunoaffinity extraction procedure coupled with HPLC and ELISA. PLoS One 2012; 7:e46929. [PMID: 23056532 PMCID: PMC3466172 DOI: 10.1371/journal.pone.0046929] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 09/06/2012] [Indexed: 11/19/2022] Open
Abstract
Background In the European Union (EU), the use of diniconazole-M is no longer authorized. However, residues of diniconazole-M occur in various plant commodities. Methodology/Principal Findings A selective and simple analytical method for the trace level determination of diniconazole in soil, fruit, vegetables and water samples was developed based on immunoaffinity extraction followed by Enzyme-linked immunosorbent assay (ELISA) and the high-performance liquid chromatography (HPLC) analysis. The ELISA was based on monoclonal antibodies highly specific to diniconazole and was a fast, cost-effective, and selective screening method for the detection of diniconazole. The results of the ELISA correlated well with gas chromatography (GC) results, with the correlation coefficient of 0.9879 (n = 19). A simple gel permeation chromato- graphy clean-up method was developed to purify extracts from matrices containing high amounts of fat and natural pigments, without the need for a large dilution of the sample. The immunoaffinity column (IAC) capacity was 0.180 mg g−1. The columns could be re-used approximately 20 times with no significant alteration in capacity. The recoveries from complex samples were in the range of 89.2% to 96.1% with a relative standard deviation (RSD) of 0.770%–6.11% by ELISA. The results were in good agreement with those obtained by HPLC method. Conclusion/Significance The IAC extraction procedure coupled with HPLC and ELISA analysis could be also used as alternative effective analytical methods for the determination of diniconazole concentrations in complex samples.
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Liu B, Ge Y, Zhang Y, Song Y, Lv Y, Wang X, Wang S. Production of the class-specific antibody and development of direct competitive ELISA for multi-residue detection of organophosphorus pesticides. FOOD AGR IMMUNOL 2012. [DOI: 10.1080/09540105.2011.608120] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Sathe M, Ghorpade R, Merwyn S, Agarwal GS, Kaushik MP. Direct hapten-linked competitive inhibition enzyme-linked immunosorbent assay (CIELISA) for the detection of O-pinacolyl methylphosphonic acid. Analyst 2012; 137:406-13. [DOI: 10.1039/c1an15773f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Sathe M, Derveni M, Broadbent G, Bodlenner A, Charlton K, Ravi B, Rohmer M, Sims MR, Cullen DC. Synthesis and characterisation of immunogens for the production of antibodies against small hydrophobic molecules with biosignature properties. Anal Chim Acta 2011; 708:97-106. [PMID: 22093350 DOI: 10.1016/j.aca.2011.09.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 09/09/2011] [Accepted: 09/15/2011] [Indexed: 10/17/2022]
Abstract
In the present study, five different classes of small hydrophobic molecular targets, atypical for antibody generation, were structurally modified in order to introduce suitable reactive functionalities and/or spacers which allow covalent coupling to a carrier protein resulting in a stable carrier-hapten complex. These targets were chosen to serve as markers of extant and/or extinct life in the context of the development of the Life Marker Chip (LMC), an antibody-based instrument, which is being developed by a UK-led international consortium for flight to Mars on board the joint ESA/NASA Mars exploration ExoMars mission. The hapten-protein conjugates were designed to be used as immunogens for antibody generation and immunoassay reagents in subsequent stages of the LMC development. The extent of protein modification due to covalent attachment of hapten was determined by two independent methods, i.e. trinitrobenzenesulfonic acid (TNBSA) titrations of remaining protein reactive groups and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) of the resultant hapten-protein conjugates. In a further quality validation step, the conjugates were presented to an animal's immune system and polyclonal antibody titres with moderate specificity were obtained. These results suggest that conjugates synthesized as described herein can successfully be used in the generation of antibodies targeting small hydrophobic molecules.
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Ohshima M, Inoue K, Hayashi H, Tsuji D, Mizugaki M, Itoh K. Generation of AcGFP fusion with single-chain Fv selected from a phage display library constructed from mice hyperimmunized against 5-methyl 2'-deoxycytidine. Protein Eng Des Sel 2010; 23:881-8. [PMID: 20876190 DOI: 10.1093/protein/gzq066] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
DNA methylation is involved in many diseases such as cancer and autoimmunity. We generated recombinant single-chain Fv (scFv) antibodies against 5-methyl-2'-deoxycytidine (m(5)dCyd) using phage display technology and a hyperimmunized mouse, and the scFv of most interest were constructed as fusion proteins with green fluorescent protein obtained from Aequorea coerulescens GFP (AcGFP). Using RNA isolated from mouse spleens, we constructed a scFv library consisting of λ light chains. The scFv library was selected against m(5)Cyd-BSA and enriched through four rounds of panning. The scFv library was concentrated about 390-fold and an individual clone was reacted with m(5)Cyd-BSA. Two scFvs with high reactivity for m(5)Cyd-BSA termed 1-2 and 1-12 were produced. Furthermore, methylated DNA-binding activities of the scFvs were confirmed using an indirect immunofluorescence assay. Additionally, N- and C-terminal scFv 1-2 fusion with AcGFP were constructed, and we observed the N-terminal AcGFP exhibited much higher fluorescence intensity than the C-terminal fusions. The AcGFP-scFv 1-2 modified N-terminus of scFv with AcGFP had high fluorescence intensity, but the scFv 1-2-AcGFP modified C-terminus of scFv with AcGFP had low fluorescence intensity. The cross-reactivity of AcGFP-scFv 1-2 was similar to scFv 1-2, and thus, AcGFP-scFv 1-2 could be used in a direct immunofluorescence assay. The scFv fusion proteins may be useful for the detection and quantification of cellular methylated DNA in various specimens.
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Affiliation(s)
- Motohiro Ohshima
- Department of Clinical Pharmacology and Genetics, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, Japan
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Liu YH, Wang CM, Guo YR, Liang X, Gui W, Zhu GN. Monoclonal antibody produced by heterologous indirect enzyme-linked immunosorbent assay and its application for parathion residue determination in agricultural and environmental samples. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2010; 45:547-556. [PMID: 20603747 DOI: 10.1080/03601234.2010.493490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A heterologous indirect enzyme-linked immunosorbent assay (ELISA) was developed, which was based on monoclonal antibody (Mab) to determine parathion residue in agricultural and environmental samples. Eight Mabs were produced by introducing the heterologous indirect ELISA into the screening procedure. It was shown that these Mabs had more broad-reactivity with twenty competitors than that of 5H7 (Mab produced by homologous screening). So it became much easier using these new Mabs to develop heterologous immunoassays. In addition, all the developed heterologous ELISAs could be used to determine parathion residue in semiquantitative or quantitative level, and their detection limitation (LOD) was around 2 ng/mL. Compared with the previous heterologous ELISA (hapten 11/5H7) with IC(50) of 13.3 ng/mL, a better heterologous ELISA (hapten 11/1E1) was obtained with IC(50) of 3.8 ng/mL, which improved the sensitivity 3.5 times. Finally, the latter was applied to parathion residue determination in spiked agricultural and environmental samples without extraction or cleanup. The average recoveries of parathion added to water, soil, cucumber, Chinese cabbage and carrot were between 80.4 % and 111.8 %. The LOD for water and soil samples was 5 ng/mL, and the LOD for cucumber, rice and corn samples was 10 ng/mL.
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Affiliation(s)
- Yi H Liu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, China
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15
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Fukuda T, Tsuchiya K, Makishima H, Tsuchiyama K, Mulchandani A, Kuroda K, Ueda M, Suye SI. Organophosphorus compound detection on a cell chip with yeast coexpressing hydrolase and eGFP. Biotechnol J 2010; 5:515-9. [DOI: 10.1002/biot.200900292] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Fukuda T, Tsuchiyama K, Makishima H, Takayama K, Mulchandani A, Kuroda K, Ueda M, Suye SI. Improvement in organophosphorus hydrolase activity of cell surface-engineered yeast strain using Flo1p anchor system. Biotechnol Lett 2010; 32:655-9. [PMID: 20111980 PMCID: PMC2852028 DOI: 10.1007/s10529-010-0204-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 12/28/2009] [Accepted: 01/06/2010] [Indexed: 11/26/2022]
Abstract
Organophosphorus hydrolase (OPH) hydrolyzes organophosphorus esters. We constructed the yeast-displayed OPH using Flo1p anchor system. In this system, the N-terminal region of the protein was fused to Flo1p and the fusion protein was displayed on the cell surface. Hydrolytic reactions with paraoxon were carried out during 24 h of incubation of OPH-displaying cells at 30 degrees C. p-Nitrophenol produced in the reaction mixture was detected by HPLC. The strain with highest activity showed 8-fold greater OPH activity compared with cells engineered using glycosylphosphatidylinositol anchor system, and showed 20-fold greater activity than Escherichia coli using the ice nucleation protein anchor system. These results indicate that Flo1p anchor system is suitable for display of OPH in the cell surface-expression systems.
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Affiliation(s)
- Takeshi Fukuda
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, University of Fukui, 3-9-1, Bunkyo, Fukui, 910-8507 Japan
| | - Kouta Tsuchiyama
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, University of Fukui, 3-9-1, Bunkyo, Fukui, 910-8507 Japan
| | - Hirokazu Makishima
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, University of Fukui, 3-9-1, Bunkyo, Fukui, 910-8507 Japan
| | - Katsumi Takayama
- Department of Chemistry and Biology Engineering, Fukui National College of Technology, Geshi-cho, Sabae, Fukui, 916-8507 Japan
| | - Ashok Mulchandani
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521 USA
| | - Kouichi Kuroda
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502 Japan
| | - Mitsuyoshi Ueda
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502 Japan
| | - Shin-ichiro Suye
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, University of Fukui, 3-9-1, Bunkyo, Fukui, 910-8507 Japan
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Li ZK, Zhu YY, Yin XG, Peng CF, Chen W, Liu LQ, Yin LM, Xu CL. Development of an Indirect Enzyme-Linked Immunosorbent Assay for the Organophosphorus Pesticide Paraoxon-Methyl. Immunol Invest 2009; 38:510-25. [DOI: 10.1080/08820130902803689] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Hao XL, Kuang H, Li YL, Yuan Y, Peng CF, Chen W, Wang LB, Xu CL. Development of an enzyme-linked immunosorbent assay for the alpha-cyano pyrethroids multiresidue in Tai lake water. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:3033-3039. [PMID: 19368347 DOI: 10.1021/jf803807b] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A general and broad class selective competitive enzyme-linked immunosorbent assay (ELISA) for the detection of the alpha-cyano pyrethroids was developed. One class specific hapten, the 5-(3-benzylphenyl)-5-cyanopentanoic acid (CPBA-BE), was conjugated with BSA as an immunogen. Polyclonal antibodies, PY-antibodies, were generated. The assay with the most selectivity for the family alpha-cyano pyrethroids such as cyphenothrin was further optimized and tested for tolerance to cosolvent, pH, and ionic strength changes. The IC(50) values of the optimized immunoassay were 4.58 microg L(-1) for cyphenothrin, 5.62 microg L(-1) for fenpropathrin, 7.08 microg L(-1) for deltamethrin, 10.72 microg L(-1) for cypermethrin, 19.95 microg L(-1) for flucythrinate, and 28.18 microg L(-1) for esfenvalerate. The cross-reactivities of cyphenothrin, fenpropathrin, deltamethrin, cypermethrin, flucythrinate, and esfenvalerate were 100%, 81.49%, 64.68%, 42.72%, 22.96%, and 16.25%, respectively. The low detection limit (LDL) of this assay was 0.107 microg L(-1) for cyphenothrin. This method was used for the detection of the alpha-cyano pyrethroids in Tai lake water.
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Affiliation(s)
- X L Hao
- School of Food Science and Technology, Jiangnan University, Wuxi, JiangSu, 214000, China
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Tang J, Zhang M, Cheng G, Lu Y. Development of Fluorescence Polarization Immunoassay for the Detection of Organophosphorus Pesticides Parathion and Azinphos-Methyl. J Immunoassay Immunochem 2008; 29:356-69. [DOI: 10.1080/15321810802329757] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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20
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Wang W, Lu Y, Zhang S, Wang S, Cao P, Tian Y, Zhang X. Development of a chemiluminescent imaging assay for the detection of anti-erythropoietin antibody in human sera. LUMINESCENCE 2008; 24:55-61. [PMID: 18780331 DOI: 10.1002/bio.1065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Measuring low amounts of anti-erythropoietin antibodies (anti-EPO Abs) is important to evaluate the therapeutic safety of recombinant human erythropoietin (rhEPO). In this work, a simple, sensitive and high-throughput chemiluminescent (CL) imaging assay was developed for the detection of anti-EPO Abs in human sera. The influence of several physicochemical parameters, such as coating conditions, incubation time, detergent concentration and exposure time, were investigated. A calibration curve was established and the range of quantitative detection was 0.12-13.91 ng/mL. The limit of detection (LOD, 3sigma) for the CL-imaging assay was 0.033 ng/mL. Compared to conventional colorimetric enzyme-linked immunosorbent assay (ELISA), the LOD of the CL-imaging assay is 50-fold lower. The recoveries of anti-EPO Abs in the fortified serum were in the range 87.1-116.9% using the present method, which highlighted the validity of the CL-imaging assay system to accurately determine the anti-EPO Abs in serum samples. CL-imaging assay was used to evaluate the presence of anti-EPO Abs in serum samples obtained from chronic renal failure (CRF) patients treated with rhEPO. Contrary to what was expected, the sera from CRF patients did not contain anti-EPO Abs.
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Affiliation(s)
- Wenjun Wang
- Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of the Education Ministry, Tsinghua University, 100084 Beijing, People's Republic of China
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21
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Schmidt CD, Böttcher C, Hirsch A. Synthesis and Aggregation Properties of Water-Soluble Newkome-Dendronized Perylenetetracarboxdiimides. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700567] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Wang WJ, Ling Y, Xu T, Gao HB, Sheng W, Li J. Development of an Indirect Competitive ELISA Based on Polyclonal Antibody for the Detection of Diethylstilbestrol in Water Samples. CHINESE J CHEM 2007. [DOI: 10.1002/cjoc.200790214] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Development of Monoclonal Antibody-based Enzyme-linked Immunosorbent Assay to the Estrogen Diethylstilbestrol. CHINESE J CHEM 2006. [DOI: 10.1002/cjoc.200690329] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Watanabe E, Miyake S, Ito S, Baba K, Eun H, Ishizaka M, Endo S. Reliable enzyme immunoassay detection for chlorothalonil: fundamental evaluation for residue analysis and validation with gas chromatography. J Chromatogr A 2006; 1129:273-82. [PMID: 16870194 DOI: 10.1016/j.chroma.2006.06.095] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2006] [Revised: 06/27/2006] [Accepted: 06/30/2006] [Indexed: 10/24/2022]
Abstract
This work describes the analytical performance of the enzyme-linked immunosorbent assay (ELISA) for the fungicide chlorothalonil to effectively exploit as a simple and rapid detection system for pesticide residue on the scenes of the agricultural production and distribution. This ELISA represents the satisfactory analytical characteristics (I50 value, 0.34 ng/g; limit of detection, 0.052 ng/g) to detect chlorothalonil at the regulatory values or thereabout in a sample. Noticeable cross-reactivities were shown with two fungicides, fthalide (58.8%) and pentachloronitrobenzene (quintozene) (20.0%), and some non-agrochemicals such as tetrachloroterephthalonitrile (96.8%) and tetrachlorophthalonitrile (68.3%). The influence of three organic solvents (methanol, acetone, and acetonitrile) used as extractants for chlorothalonil residue was evaluated, with the result that methanol was the most suitable solvent for the ELISA, and the final concentration in the well could be up to 5% (v/v) without any negative influence on the ELISA. It has been possible to directly analyze chlorothalonil residue only by giving dilution of each sample extract with water prior to the ELISA analysis. The average recovery values from the spiked samples by the ELISA were between 101.7 and 113.6% with the average coefficients of variation between 2.6 and 5.9%. Although the results obtained from the ELISA correlated well with those from the reference GC/MS methods for all agricultural samples (r>0.98), the linear function inclined to the ELISA results because of loss during complex sample preparations for GC/MS analysis. Nevertheless, the results demonstrated that the proposed ELISA is a reliable, cost-effective, and rapid quantitative method for chlorothalonil residue.
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Affiliation(s)
- Eiki Watanabe
- National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba City, Ibaraki, Japan.
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25
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Ahn KC, Ma SJ, Tsai HJ, Gee SJ, Hammock BD. An immunoassay for a urinary metabolite as a biomarker of human exposure to the pyrethroid insecticide permethrin. Anal Bioanal Chem 2006; 384:713-22. [PMID: 16416099 DOI: 10.1007/s00216-005-0220-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2005] [Revised: 10/27/2005] [Accepted: 11/02/2005] [Indexed: 10/25/2022]
Abstract
Permethrin is the most popular synthetic pyrethroid insecticide used in agriculture and public health. For the assessment of human exposure to permethrin, a competitive indirect enzyme-linked immunosorbent assay (ELISA) for the detection of the glycine conjugate of a major metabolite, cis-/trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-1-carboxylic acid (DCCA), of permethrin was developed based on a polyclonal antibody. An assay based on an antibody with a high sensitivity was optimized and characterized. The IC50 value and the detection range for trans-DCCA-glycine, in the assay buffer were 1.2 and 0.2-7.0 microg/L, respectively. The antibody recognized trans-DCCA-glycine and the mixture of cis-/trans-DCCA-glycine with an isomer range from 30:70 to 50:50 nearly equally. Little or no cross-reactivity to permethrin and its other free metabolites or glycine conjugates was measured. The integration of the ELISA and solid-phase extraction which was used to reduce the matrix effect from human urine samples provided for analysis of total cis-/trans-DCCA-glycine at low parts per billion levels in the samples. The limit of quantitation of the target analyte was 1.0 microg/L in urine with a limit of detection of 0.1 microg/L in buffer. This assay might be a useful tool for monitoring human exposure to permethrin.
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Affiliation(s)
- Ki Chang Ahn
- Department of Entomology and UCD Cancer Research Center, University of California, Davis, CA 95616, USA
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26
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Otis F, Voyer N, Polidori A, Pucci B. End group engineering of artificial ion channels. NEW J CHEM 2006. [DOI: 10.1039/b509668e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Comparative study of three immunoassays based on monoclonal antibodies for detection of the pesticide parathion-methyl in real samples. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2004.01.047] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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