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Wang CC, Yin HB, Bai SJ, Zhang R, Li CH, Tang MZ, Xu YX. Probe the terminal interactions and their synergistic effects on polyisoprene properties by mimicking the structure of natural rubber. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Affinity characteristics of anti-β-(1→3)-d-glucan monoclonal antibody 3G11 by fluorescence polarization immunoassay. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3175-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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3
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Krylov VB, Petruk MI, Karimova MP, Mukhametova LI, Matveev AL, Tikunova NV, Eremin SA, Nifantiev NE. Potential of fluorescence polarization immunoassay for the detection of Aspergillus fumigatus galactomannan. Russ Chem Bull 2020. [DOI: 10.1007/s11172-019-2713-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Fluorescence polarization assays for chemical contaminants in food and environmental analyses. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.03.013] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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He Q, Cui X, Shen D, Chen Y, Jiang Z, Lv R, Eremin SA, Zhao S. Development of a simple, rapid and high-throughput fluorescence polarization immunoassay for glycocholic acid in human urine. J Pharm Biomed Anal 2018; 158:431-437. [DOI: 10.1016/j.jpba.2018.06.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 06/12/2018] [Accepted: 06/15/2018] [Indexed: 02/06/2023]
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6
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Fluorescence polarisation immunoassays for strobilurin fungicides kresoxim-methyl, trifloxystrobin and picoxystrobin. Talanta 2017; 162:495-504. [DOI: 10.1016/j.talanta.2016.10.063] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/11/2016] [Accepted: 10/15/2016] [Indexed: 11/19/2022]
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Korrapati S, Pullela PK, Vijayalakshmi U. SPA enhanced FPIA‐based detection of pesticide residue with ppb/ppt level detection limit. IET Nanobiotechnol 2016; 11:24-31. [DOI: 10.1049/iet-nbt.2016.0031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Swathi Korrapati
- Bigtec Pvt. Ltd.59th ‘C’ cross, 4th ‘M’ Block, RajajinagarBangalore 560 010India
| | - Phani Kumar Pullela
- Department of Chemistry CMR Institute of TechnologyITPL Main RoadBangalore 560 037KarnatakaIndia
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Chen J, Shanin IA, Lv S, Wang Q, Mao C, Xu Z, Sun Y, Wu Q, Eremin SA, Lei H. Heterologous strategy enhancing the sensitivity of the fluorescence polarization immunoassay of clinafloxacin in goat milk. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:1341-1346. [PMID: 25914021 DOI: 10.1002/jsfa.7228] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 04/09/2015] [Accepted: 04/19/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Clinafloxacin is used for the treatment of disease in food-producing animals, e.g. Brucella melitensis, which often occurs in goats; however, the clinafloxacin residue in goat milk may harm human health and result in the development of drug-resistant bacterial strains or allergies. Despite this, there is not a rapid, sensitive and accurate analytical method in goat milk for rapid screening or monitoring purposes. RESULTS One homologous and five heterologous tracers were designed and compared for fluorescence polarization immunoassay (FPIA) optimization. Based on the combination of a heterologous tracer (PAZ-FITC, synthesized with pazufloxacin and FITC) and the antibody against clinafloxacin, a highly sensitive FPIA was established for the detection of clinafloxacin residue in goat milk for the first time. The IC50 value was 29.3 µg L(-1) for clinafloxacin in the heterologous format - six times lower than that of the combination of the homologous tracers and the antibody. The recoveries ranged from 86.8% to 104.5%, with the relative standard deviation ranging from 4.1% to 7.2%. Validation by high-performance liquid chromatography (HPLC) confirmed that the results obtained from the proposed FPIA were in agreement with those of HPLC. CONCLUSION This proposed heterologous strategy for enhanced FPIA is sensitive and rapid enough for the high-throughput detection of clinafloxacin residue in goat milk.
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Affiliation(s)
- Jiahong Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Provincial Engineering and Technique Research Centre of Food Safety Detection and Risk Assessment, South China Agricultural University, Guangzhou, 510642, China
| | - Ilya A Shanin
- Faculty of Chemistry, MV Lomonosov Moscow State University, 119991, Moscow, Russia
- AN Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, 119071, Russia
| | - Shuwei Lv
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Provincial Engineering and Technique Research Centre of Food Safety Detection and Risk Assessment, South China Agricultural University, Guangzhou, 510642, China
| | - Qiang Wang
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Chuanbin Mao
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, Norman, OK, 73019, USA
| | - Zhenlin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Provincial Engineering and Technique Research Centre of Food Safety Detection and Risk Assessment, South China Agricultural University, Guangzhou, 510642, China
| | - Yuanming Sun
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Provincial Engineering and Technique Research Centre of Food Safety Detection and Risk Assessment, South China Agricultural University, Guangzhou, 510642, China
| | - Qing Wu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Provincial Engineering and Technique Research Centre of Food Safety Detection and Risk Assessment, South China Agricultural University, Guangzhou, 510642, China
| | - Sergei A Eremin
- Faculty of Chemistry, MV Lomonosov Moscow State University, 119991, Moscow, Russia
- AN Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, 119071, Russia
| | - Hongtao Lei
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Provincial Engineering and Technique Research Centre of Food Safety Detection and Risk Assessment, South China Agricultural University, Guangzhou, 510642, China
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Novel mutations and mutation combinations of ryanodine receptor in a chlorantraniliprole resistant population of Plutella xylostella (L.). Sci Rep 2014; 4:6924. [PMID: 25377064 PMCID: PMC4223681 DOI: 10.1038/srep06924] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 10/17/2014] [Indexed: 11/20/2022] Open
Abstract
A previous study documented a glycine to glutamic acid mutation (G4946E) in ryanodine receptor (RyR) was highly correlated to diamide insecticide resistance in field populations of Plutella xylostella (Lepidoptera: Plutellidae). In this study, a field population collected in Yunnan province, China, exhibited a 2128-fold resistance to chlorantraniliprole. Sequence comparison between resistant and susceptible P. xylostella revealed three novel mutations including a glutamic acid to valine substitution (E1338D), a glutamine to leucine substitution (Q4594L) and an isoleucine to methionine substitution (I4790M) in highly conserved regions of RyR. Frequency analysis of all four mutations in this field population showed that the three new mutations showed a high frequency of 100%, while the G4946E had a frequency of 20%. Furthermore, the florescent ligand binding assay revealed that the RyR containing multiple mutations displayed a significantly lower affinity to the chlorantraniliprole. The combined results suggested that the co-existence of different combinations of the four mutations was involved in the chlorantraniliprole resistance. An allele-specific PCR based method was developed for the diagnosis of the four mutations in the field populations of P. xylostella.
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Guo L, Wang Y, Zhou X, Li Z, Liu S, Pei L, Gao X. Functional analysis of a point mutation in the ryanodine receptor of Plutella xylostella (L.) associated with resistance to chlorantraniliprole. PEST MANAGEMENT SCIENCE 2014; 70:1083-9. [PMID: 24030900 DOI: 10.1002/ps.3651] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 09/03/2013] [Accepted: 09/13/2013] [Indexed: 05/15/2023]
Abstract
BACKGROUND The diamondback moth, Plutella xylostella (L.) has developed extremely high resistance to chlorantraniliprole and other diamide insecticides in the field. A glycine to glutamic acid substitution (G4946E) in the P. xylostella ryanodine receptor (PxRyR) has been found in two resistant populations collected in Thailand and Philippines and was considered associated with the diamide insecticides resistance but no experimental evidence was provided. The present study aimed to clarify the function of the reported mutation in chlorantraniliprole resistance in P. xylostella. RESULTS We identified the same mutation (G4946E) in PxRyR from four field collected chlorantraniliprole resistant populations of Plutella xylostella in China. Most importantly, we found that the frequency of the G4946E mutation is significantly correlated to the chlorantraniliprole resistance ratios in P. xylostella (R(2) = 0.82, P = 0.0003). Ligand binding assays showed that the binding affinities of the PxRyR to the chlorantraniliprole in three field resistant populations were 2.41-, 2.54- and 2.60-times lower than that in the susceptible one. CONCLUSION For the first time we experimentally proved that the G4946E mutation in PxRyR confers resistance to chlorantraniliprole in Plutella xylostella. These findings pave the way for the complete understanding of the mechanisms of diamide insecticides resistance in insects.
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Affiliation(s)
- Lei Guo
- Department of Entomology, China Agricultural University, Beijing, P.R. China
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Yang JY, Zhang Y, Wang H, Xu ZL, Eremin SA, Shen YD, Wu Q, Lei HT, Sun YM. Development of fluorescence polarisation immunoassay for carbofuran in food and environmental water samples. FOOD AGR IMMUNOL 2014. [DOI: 10.1080/09540105.2014.914890] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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12
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Xu ZL, Wang Q, Lei HT, Eremin SA, Shen YD, Wang H, Beier RC, Yang JY, Maksimova KA, Sun YM. A simple, rapid and high-throughput fluorescence polarization immunoassay for simultaneous detection of organophosphorus pesticides in vegetable and environmental water samples. Anal Chim Acta 2011; 708:123-9. [DOI: 10.1016/j.aca.2011.09.040] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 09/27/2011] [Accepted: 09/30/2011] [Indexed: 11/29/2022]
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13
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Gorris HH, Bade S, Röckendorf N, Fránek M, Frey A. Pushing antibody-based labeling systems to higher sensitivity by linker-assisted affinity enhancement. Bioconjug Chem 2011; 22:1619-24. [PMID: 21749125 DOI: 10.1021/bc2001787] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The sensitivity of antibody/hapten-based labeling systems is limited by the natural affinity ceiling of immunoglobulins. Breaking this limit by antibody engineering is difficult. We thus attempted a different approach and investigated if the so-called bridge effect, a corecognition of the linker present between hapten and carrier protein during antibody generation, can be utilized to improve the affinity of such labeling systems. The well-known haptens 2,4-dinitrophenol (2,4-DNP) and 2,4-dichlorophenoxyacetic acid (2,4-D) were equipped with various linkers, and the resulting affinity change of their cognate antibodies was analyzed by ELISA. Anti-2,4-DNP antibodies exhibited the best affinity to their hapten when it was combined with aminobutanoic acid or aminohexanoic acid. The affinity of anti-2,4-D antibodies could be enhanced even further with longer aliphatic spacers connected to the hapten. The affinity toward aminoundecanoic acid-2,4-D derivatives, for instance, was improved about 100-fold compared to 2,4-D alone and yielded detection limits as low as 100 amoles of analyte. As the effect occurred for all antibodies and haptens tested, it may be sensible to implement the bridge effect in future antibody/hapten-labeling systems in order to achieve the highest sensitivity possible.
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Affiliation(s)
- Hans H Gorris
- Division of Mucosal Immunology and Diagnostics, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany
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Zhang S, Shen Y, Sun Y. Monoclonal Antibody-Based Fluorescence Polarization Immunoassay for Furazolidone in Feed. ANAL LETT 2010. [DOI: 10.1080/00032711003731449] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Xie C, Dong C, Ren J. Study on homogeneous competitive immune reaction by fluorescence correlation spectroscopy: Using synthetic peptide as antigen. Talanta 2009; 79:971-4. [DOI: 10.1016/j.talanta.2009.05.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Revised: 05/11/2009] [Accepted: 05/11/2009] [Indexed: 10/20/2022]
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Gorris HH, Bade S, Röckendorf N, Albers E, Schmidt MA, Fránek M, Frey A. Rapid Profiling of Peptide Stability in Proteolytic Environments. Anal Chem 2009; 81:1580-6. [DOI: 10.1021/ac802324f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hans H. Gorris
- Division of Mucosal Immunology, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany, Institute of Infectiology, University of Münster, von-Esmarch-Strasse 56, 48149 Münster, Germany, and Department of Analytical Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
| | - Steffen Bade
- Division of Mucosal Immunology, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany, Institute of Infectiology, University of Münster, von-Esmarch-Strasse 56, 48149 Münster, Germany, and Department of Analytical Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
| | - Niels Röckendorf
- Division of Mucosal Immunology, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany, Institute of Infectiology, University of Münster, von-Esmarch-Strasse 56, 48149 Münster, Germany, and Department of Analytical Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
| | - Eike Albers
- Division of Mucosal Immunology, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany, Institute of Infectiology, University of Münster, von-Esmarch-Strasse 56, 48149 Münster, Germany, and Department of Analytical Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
| | - M. Alexander Schmidt
- Division of Mucosal Immunology, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany, Institute of Infectiology, University of Münster, von-Esmarch-Strasse 56, 48149 Münster, Germany, and Department of Analytical Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
| | - Milan Fránek
- Division of Mucosal Immunology, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany, Institute of Infectiology, University of Münster, von-Esmarch-Strasse 56, 48149 Münster, Germany, and Department of Analytical Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
| | - Andreas Frey
- Division of Mucosal Immunology, Research Center Borstel, Parkallee 22, 23845 Borstel, Germany, Institute of Infectiology, University of Münster, von-Esmarch-Strasse 56, 48149 Münster, Germany, and Department of Analytical Biotechnology, Veterinary Research Institute, Hudcova 70, 621 32 Brno, Czech Republic
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Mercader JV, Suárez-Pantaleón C, Agulló C, Abad-Somovilla A, Abad-Fuentes A. Hapten synthesis and monoclonal antibody-based immunoassay development for detection of the fungicide trifloxystrobin. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:2581-2588. [PMID: 18373349 DOI: 10.1021/jf800157s] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
High-affinity and selective monoclonal antibodies have been produced against the strobilurin fungicide trifloxystrobin. A battery of functionalized haptens has been synthesized, and conjugate-coated enzyme-linked immunosorbent assays following different procedures have been developed. On the one hand, a two-step conjugate-coated immunoassay was optimized using extended or short incubation times, with limits of detection of 0.10 ng/mL for the extended assay and 0.17 ng/mL for the rapid assay. On the other hand, an immunoassay in the conjugate-coated format was optimized following a procedure consisting of just one incubation step. This one-step assay had a limit of detection of 0.21 ng/mL. All of these assays showed detection limits for trifloxystrobin in the low parts per billion range, well below the common maximum residue limits for this pesticide in foodstuffs (50 microg/kg).
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Affiliation(s)
- Josep V Mercader
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos, Consejo Superior de Investigaciones Científicas, P.O. Box 73, 46100 Burjassot, València, Spain
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Mercader JV, Suárez-Pantaleón C, Agulló C, Abad-Somovilla A, Abad-Fuentes A. Hapten synthesis and monoclonal antibody-based immunoassay development for the detection of the fungicide kresoxim-methyl. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:1545-1552. [PMID: 18251498 DOI: 10.1021/jf073039x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Strobilurin fungicides have been increasingly used for fungus pest control since they were introduced in 1996. For pesticide residue detection, immunoassays constitute nowadays a valuable approach. This paper describes the synthesis of functionalized haptens of kresoxim-methyl, the production of monoclonal antibodies, and the development of enzyme-linked immunosorbent assays. On the one hand, a two-step conjugate-coated immunoassay was optimized using extended or short incubation times, with limits of detection of 0.4 ng/mL for the extended assay and 0.3 ng/mL for the rapid assay. On the other hand, an immunoassay was optimized following a procedure consisting of just one incubation step. This one-step assay had a limit of detection of 0.4 ng/mL. All of these assays showed a similar performance, with sensitivities well below common maximum residue limits for this pesticide (50 microg/kg) and lower than the detection limits of the usual chromatographic detection methods.
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Affiliation(s)
- Josep V Mercader
- Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos, Consejo Superior de Investigaciones Científicas, P.O. Box 73, 46100 Burjassot, València, Spain
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Smith DS, Eremin SA. Fluorescence polarization immunoassays and related methods for simple, high-throughput screening of small molecules. Anal Bioanal Chem 2008; 391:1499-507. [PMID: 18264817 DOI: 10.1007/s00216-008-1897-z] [Citation(s) in RCA: 167] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Revised: 01/14/2008] [Accepted: 01/17/2008] [Indexed: 11/24/2022]
Abstract
Fluorescence polarization immunoassay (FPIA) is a homogeneous (without separation) competitive immunoassay method based on the increase in fluorescence polarization (FP) of fluorescent-labeled small antigens when bound by specific antibody. The minimum detectable quantity of FPIAs with fluorescein label (about 0.1 ng analyte) is comparable with chromatography and ELISA methods, although this may be limited by sample matrix interference. Because of its simplicity and speed, FPIA is readily automated and therefore suitable for high-throughput screening (HTS) in a variety of application areas. Systems that involve binding of ligands to receptor proteins are also susceptible to analysis by analogous FP methods employing fluorescent-labeled ligand and HTS applications have been developed, notably for use in candidate drug screening.
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Affiliation(s)
- David S Smith
- MicroPharm Ltd, 51-53 Bartholomew Close, St. Bartholomew's Hospital, London, EC1A 7BE, UK
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Wang Z, Zhang S, Nesterenko IS, Eremin SA, Shen J. Monoclonal antibody-based fluorescence polarization immunoassay for sulfamethoxypyridazine and sulfachloropyridazine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:6871-8. [PMID: 17661485 DOI: 10.1021/jf070948d] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
In this paper, a new monoclonal antibody (Mab) against sulfamethoxypyridazine (SMP) was produced, and a fluorescence polarization immunoassay (FPIA) based on the produced Mab was developed and optimized for the qualitative screening analysis of SMP. The Mab was raised from mice immunized with SMP linked to bovine serum albumin (BSA) by carbodiimide activated ester formation, using a succinic anhydride spacer molecule between SMP and BSA. Fluorescein labeled sulfachloropyridazine (SCP) and SMP (tracer) were synthesized and purified by thin layer chromatography (TLC). The developed screening FPIA method can tolerate up to 20% methanol, and satisfactory assay sensitivity can be obtained between pH 4 and pH 8 and at lower salt concentration. The anti-SMP Mab exhibited a high cross-reactivity with SCP. The effect of the tracer structure on the analytical characteristic of the determination and on antigen-antibody binding constants was studied. The limits of detection (LOD) were 0.7 ng/mL for SMP and 0.25 ng/mL for SCP in buffer, respectively, whereas negligible cross-reactivities were exhibited by related sulfonamides. Analysis of SMP and SCP-fortified milk samples by the FPIA showed average recoveries from 60 to 145%.
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Affiliation(s)
- Zhanhui Wang
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, China Agricultural University, Beijing 100094, People's Republic of China
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Hunt CE, Pasetto P, Ansell RJ, Haupt K. A fluorescence polarisation molecular imprint sorbent assay for 2,4-D: a non-separation pseudo-immunoassay. Chem Commun (Camb) 2006:1754-6. [PMID: 16609794 DOI: 10.1039/b516194k] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first pseudo-immunoassay which employs a molecularly imprinted receptor and a fluorescent probe, and quantifies the bound analyte directly using the fluorescence anisotropy of the polymer-probe-analyte suspension, is described.
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Affiliation(s)
- Claire E Hunt
- School of Chemistry, University of Leeds, Leeds, UK.
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Maleki N, Safavi A, Shahbaazi H. Electrochemical determination of 2,4-D at a mercury electrode. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2004.08.058] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Deryabina MA, Yakovleva YN, Popova VA, Eremin SA. Determination of the herbicide acetochlor by fluorescence polarization immunoassay. JOURNAL OF ANALYTICAL CHEMISTRY 2005. [DOI: 10.1007/s10809-005-0063-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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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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Yakovleva J, Davidsson R, Bengtsson M, Laurell T, Emnéus J. Microfluidic enzyme immunosensors with immobilised protein A and G using chemiluminescence detection. Biosens Bioelectron 2003; 19:21-34. [PMID: 14558995 DOI: 10.1016/s0956-5663(03)00126-x] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Affinity proteins were covalently immobilised on silicon microchips with overall dimensions of 13.1 x 3.2 mm, comprising 42 porous flow channels of 235 microm depth and 25 microm width, and used to develop microfluidic immunosensors based on horseradish peroxidase (HRP), catalysing the chemiluminescent oxidation of luminol/p-iodophenol (PIP). Different hydrophilic polymers with long flexible chains (polyethylenimine (PEI), dextran (DEX), polyvinyl alcohol, aminodextran) and 3-aminopropyltriethoxysilane (APTS) were employed for modification of the silica surfaces followed by attachment of protein A or G. The resulting immunosensors were compared in an affinity capture assay format, where the competition between the labelled antigen and the analyte for antibody-binding sites took place in the bulk of the solution. The formed immunocomplexes were then trapped by the microchip affinity capture support and the amount of bound tracer was monitored by injection of luminol, PIP and H2O2. All immunosensors were capable of detecting atrazine at the sub-microg l(-1) level. The most sensitive assays were obtained with PEI and DEX polymer modified supports and immobilised protein G, with limits of detection of 0.006 and 0.010 microg l(-1), and IC50 values of 0.096 and 0.130 microg l(-1), respectively. The protein G based immunosensors were regenerated with 0.4 M glycine-HCl buffer pH 2.2, with no loss of activity observed for a storage and operating period of over 8 months. To estimate the applicability of the immunosensors to the analysis of real samples, PEI and DEX based protein G microchips were used to detect atrazine in surface water and fruit juice, spiked with known amounts of the atrazine, giving recovery values of 87-102 and 88-124% at atrazine fortification levels of 0.5-3 and 80-240 microg l(-1), respectively.
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Affiliation(s)
- Julia Yakovleva
- Department of Chemical Enzymology, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119899, Russia
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