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Yadav S, Satija J. Shape dependent sensing potential of gold nanoparticles in etching based multicolorimetric plasmonic-ELISA. NANOSCALE ADVANCES 2022; 4:3928-3939. [PMID: 36133352 PMCID: PMC9470088 DOI: 10.1039/d2na00266c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/16/2022] [Indexed: 06/16/2023]
Abstract
In the present study, a systematic investigation has been carried out for the first time to assess the potential of three different shapes of gold nanoparticles (AuNPs), viz. nanorods (AuNRs), nanotriangles (AuNTs), and nanospheres (AuNSs), to develop a horseradish peroxidase (HRP) enzyme-mediated etching-based plasmonic ELISA (p-ELISA) strategy. The etching of the AuNPs in ELISA is achieved by 3'-3-5'-5-tetramethylbenzidine (TMB2+), which is produced by the biocatalytic conversion of chromogenic TMB via HRP. All three types of AuNPs were interacted with varying concentrations of TMB2+ (7-131 μM) (product of HRP enzyme reaction) and characterized for visible color change and by UV-Vis spectroscopy and transmission electron microscopy (TEM). From the comparative analysis of all three shapes of AuNPs, AuNRs exhibited vivid visible color change and absorbance intensity change compared to spherical and triangle-shaped nanoparticles. The TEM analysis of the etched nanoparticles revealed the gradual etching pattern of AuNRs compared to AuNTs which resulted in multicolor generation as opposed to AuNTs where the etching was relatively very fast and thus shows a faster shape transformation and poor color discrimination. Further, the potential of the AuNR etching-based optimized strategy was successfully demonstrated to develop an indirect competitive p-ELISA for human IgG detection. The developed p-ELISA showed an ultra-low visual limit of detection of 1 fg mL-1 (∼6.54 aM) without the aid of any sophisticated instruments. In the future, the developed competitive p-ELISA strategy can be easily employed to develop cost-effective, portable, and point-of-care assays for the detection of various disease biomarkers with ultra-high sensitivity.
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Affiliation(s)
- Sangeeta Yadav
- School of Biosciences and Technology, Vellore Institute of Technology (VIT) Vellore-632014 Tamilnadu India
| | - Jitendra Satija
- Centre for Nanobiotechnology, Vellore Institute of Technology (VIT) Vellore-632014 Tamilnadu India
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Singh MM, Satija J. Enzyme-assisted metal nanoparticles etching based plasmonic ELISA: Progress and insights. Anal Biochem 2022; 654:114820. [PMID: 35850200 DOI: 10.1016/j.ab.2022.114820] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 07/07/2022] [Accepted: 07/12/2022] [Indexed: 11/24/2022]
Abstract
The unique size and shape tunable localized surface plasmon resonance (LSPR) properties of the noble metal nanoparticle have been extensively exploited to realize a variety of enzyme-based optical biosensors. Although approaches like metal film deposition, nanoparticle aggregation, and synthesis & growth of metal nanoparticles are quite useful, metal nanoparticle etching-based biosensors offer greater sensitivity, selectivity, and stability against various environmental factors which makes this strategy easy to use for field applications. This review discusses the current state-of-art of plasmonic nanoparticle etching-based enzyme-linked immunosorbent assay (ELISA) realized for visual detection of various analytes. The naked eye detection, i.e. without any optical readout device, is the additional advantage of this sensing approach that reduces the analysis cost significantly making it feasible under resource-constrained settings. This review paper provides deeper insights into biocatalytic etching mechanisms of various plasmonic nanoparticles resulting in vivid color change as a function of analyte concentration. Although nanoparticle etching-based ELISA has huge potential, steps need to be taken to realize a point-of-care (POC) nanodiagnostic before its translation to a commercial technique or product that can be achieved in near future by integrating it with microfluidics technology and other technological avenues.
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Affiliation(s)
| | - Jitendra Satija
- Centre for Nanobiotechnology, VIT, Vellore, Tamil Nadu, 632014, India.
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Wang X, Wang Y, Wang S, Hou J, Cai L, Fan G. Indirect Competitive ELISA for the Determination of Total Chromium Content in Food, Feed and Environmental Samples. Molecules 2022; 27:1585. [PMID: 35268684 PMCID: PMC8911876 DOI: 10.3390/molecules27051585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 02/04/2023] Open
Abstract
Background: This study aimed to prepare monoclonal antibodies (mAbs) with high immunoreactivity, sensitivity, and specificity for the chelate (Cr(III)-EDTA) of trivalent chromium ion (Cr(III)) and ethylenediamine tetraacetic acid (EDTA). Further, the study established an indirect competitive enzyme-linked immunosorbent assay (icELISA) for detecting the total chromium content in food, feed, and environmental samples. Methods: Hapten Cr(III)-iEDTA was synthesized by chelating Cr(III) with isothiocyanatebenzyl-EDTA (iEDTA). Immunogen Cr(III)-iEDTA-BSA formed by chelating Cr(III)-iEDTA with bovine serum albumin (BSA), and coating antigen Cr(III)-iEDTA-OVA formed by chelating Cr(III)-iEDTA with ovalbumin (OVA) were prepared using the isothiocyanate method and identified by ultraviolet spectra (UV) and inductively coupled plasma optical emission spectrometry (ICP-OES). Balb/c mice were immunized with the Cr(III)-iEDTA-BSA, and the anti Cr(III)-EDTA mAb cell lines were screened by cell fusion. The Cr(III)-EDTA mAbs were prepared by induced ascites in vivo, and their immunological characteristics were assessed. Results: The immunogen Cr(III)-iEDTA-BSA was successfully synthesized, and the molecular binding ratio of Cr(III) to BSA was 15.48:1. Three hybridoma cell lines 2A3, 2A11, and 3D9 were screened, among which 2A3 was the best cell line. The 2A3 secreted antibody was stable after six passages, the affinity constant (Ka) was 2.69 × 109 L/mol, its 50% inhibition concentration (IC50) of Cr(III)-EDTA was 8.64 μg/L, and it had no cross-reactivity (CR%) with other heavy metal ion chelates except for a slight CR with Fe(III)-EDTA (1.12%). An icELISA detection method for Cr(III)-EDTA was established, with a limit of detection (LOD) of 1.0 μg/L and a working range of 1.13 to 66.30 μg/L. The average spiked recovery intra-assay rates were 90% to 109.5%, while the average recovery inter-assay rates were 90.4% to 97.2%. The intra-and inter-assay coefficient of variations (CVs) were 11.5% to 12.6% and 11.1% to 12.7%, respectively. The preliminary application of the icELISA and the comparison with ICP-OES showed that the coincidence rate of the two methods was 100%, and the correlation coefficient was 0.987. Conclusions: The study successfully established an icELISA method that meets the requirements for detecting the Cr(III)-EDTA chelate content in food, feed, and environmental samples, based on Cr(III)-EDTA mAb, and carried out its preliminary practical application.
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Affiliation(s)
- Xiaofei Wang
- Xinxiang Institute of Engineering, College of Bioengineering, Xinxiang 453700, China; (X.W.); (S.W.)
| | - Yanan Wang
- Henan Institute of Science and Technology, College of Animal Science and Veterinary Medicine, Xinxiang 453003, China; (Y.W.); (J.H.); (L.C.)
| | - Shuyun Wang
- Xinxiang Institute of Engineering, College of Bioengineering, Xinxiang 453700, China; (X.W.); (S.W.)
| | - Jie Hou
- Henan Institute of Science and Technology, College of Animal Science and Veterinary Medicine, Xinxiang 453003, China; (Y.W.); (J.H.); (L.C.)
| | - Linlin Cai
- Henan Institute of Science and Technology, College of Animal Science and Veterinary Medicine, Xinxiang 453003, China; (Y.W.); (J.H.); (L.C.)
| | - Guoying Fan
- Henan Institute of Science and Technology, College of Animal Science and Veterinary Medicine, Xinxiang 453003, China; (Y.W.); (J.H.); (L.C.)
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Yang H, Xu W, Zhou Y. Signal amplification in immunoassays by using noble metal nanoparticles: a review. Mikrochim Acta 2019; 186:859. [DOI: 10.1007/s00604-019-3904-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 10/09/2019] [Indexed: 12/11/2022]
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Gao B, Chen X, Huang X, Pei K, Xiong Y, Wu Y, Duan H, Lai W, Xiong Y. Urease-induced metallization of gold nanorods for the sensitive detection of Salmonella enterica Choleraesuis through colorimetric ELISA. J Dairy Sci 2019; 102:1997-2007. [PMID: 30612795 DOI: 10.3168/jds.2018-15580] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 11/04/2018] [Indexed: 01/06/2023]
Abstract
We applied urease-induced silver metallization on the surface of gold nanorods (AuNR) to improve colorimetric ELISA for the rapid and sensitive detection of Salmonella enterica Choleraesuis. To this end, we introduced a biotin-streptavidin system as a bridge to determine the correlation between urease and S. enterica Choleraesuis concentrations. The captured urease can catalyze the hydrolysis of urea into carbon dioxide and ammonia, and the generated ammonia can then induce the deposition of silver shell on the surface of AuNR in the presence of silver nitrate and glucose. With the decreased aspect ratio (length divided by width) of AuNR, a multicolor change of AuNR solution and a significant blue shift in the longitudinal localized surface plasmon resonance absorption peak (Δλmax) of AuNR were obtained at the target concentrations of 1.21 × 101 to 1.21 × 108 cfu/mL. Consequently, the detection limits of our proposed colorimetric ELISA were as low as 1.21 × 102 cfu/mL for qualitative detection with naked eyes, and 1.21 × 101 cfu/mL for quantitative detection, in which changes in Δλmax of AuNR were recorded with a microplate reader. These values were at least 2 to 3 orders of magnitude lower than those obtained with conventional horseradish peroxidase-based ELISA. The analytical performance of our developed colorimetric ELISA in terms of selectivity, accuracy, reliability, and practicability were investigated by analyzing S. enterica Choleraesuis-spiked pasteurized whole milk samples.
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Affiliation(s)
- Bao Gao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Xirui Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Xiaolin Huang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China.
| | - Ke Pei
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Ying Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Yunqing Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Hong Duan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China
| | - Weihua Lai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, P. R. China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, P. R. China.
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Yang Q, Cai R, Xiao W, Wu Z, Liu X, Xu Y, Xu M, Zhong H, Sun G, Liu Q, Fu Q, Xiang J. Plasmonic ELISA for Sensitive Detection of Disease Biomarkers with a Smart Phone-Based Reader. NANOSCALE RESEARCH LETTERS 2018; 13:397. [PMID: 30519882 PMCID: PMC6281541 DOI: 10.1186/s11671-018-2806-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 11/19/2018] [Indexed: 05/24/2023]
Abstract
Serum myoglobin is one of the earliest markers for the diagnosis of acute myocardial infarction. It is, therefore, critical to develop a point-of-care testing technology for myoglobin detection. In this work, we reported a sensitive plasmonic immunoassay-based on enzyme-mediated localized surface plasmon resonance change of gold nanorods for the point-of-care testing detection of myoglobin. In addition, we developed a novel plasmonic immunoassay reader using the ambient light sensor of smart phone to increase the accessibility and utility of the plasmonic immunoassay. The linear detection range of gold nanorods-based plasmonic immunoassay for myoglobin detection was 0.1-1000 ng mL-1 and the limit of detection was 0.057 ng mL-1. Myoglobin in serum samples was also analyzed by the plasmonic immunoassay. The results were significantly correlated with those of conventional enzyme-linked immunosorbent assay. The plasmonic immunoassay, coupled with smart phone-based reader, could be widely used for point-of-care testing application of acute myocardial infarction, especially in the regions with limited technological resources.
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Affiliation(s)
- Quanli Yang
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Ruitian Cai
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Wei Xiao
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Zengfeng Wu
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Xia Liu
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Yan Xu
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Miaomiao Xu
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Hui Zhong
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Guodong Sun
- Department of Orthopedics, First Affliated Hospital, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Qihui Liu
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Qiangqiang Fu
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Orthopedics, First Affliated Hospital, Jinan University, Guangzhou, 510632 People’s Republic of China
| | - Junjian Xiang
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632 People’s Republic of China
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632 People’s Republic of China
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Mohamad A, Teo H, Keasberry NA, Ahmed MU. Recent developments in colorimetric immunoassays using nanozymes and plasmonic nanoparticles. Crit Rev Biotechnol 2018; 39:50-66. [DOI: 10.1080/07388551.2018.1496063] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Azureen Mohamad
- Biosensors and Biotechnology Laboratory, Integrated Science Building, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, Brunei
| | - Huisian Teo
- Biosensors and Biotechnology Laboratory, Integrated Science Building, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, Brunei
| | - Natasha Ann Keasberry
- Biosensors and Biotechnology Laboratory, Integrated Science Building, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, Brunei
| | - Minhaz Uddin Ahmed
- Biosensors and Biotechnology Laboratory, Integrated Science Building, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, Brunei
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Plasmonic colorimetric sensors based on etching and growth of noble metal nanoparticles: Strategies and applications. Biosens Bioelectron 2018; 114:52-65. [DOI: 10.1016/j.bios.2018.05.015] [Citation(s) in RCA: 212] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 04/27/2018] [Accepted: 05/09/2018] [Indexed: 01/13/2023]
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Liu D, Pan J, Tang J, Lian N. Preparation of polymethacrylate monolith modified with cysteine for the determination of Cr(iii) ions. RSC Adv 2018; 8:24906-24912. [PMID: 35542146 PMCID: PMC9082398 DOI: 10.1039/c8ra01287c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 06/29/2018] [Indexed: 11/21/2022] Open
Abstract
In this study, a simple and rapid polymer monolith microextraction procedure was developed for the determination of Cr(iii) ions by inductively coupled plasma-atomic emission spectrometry. A monolithic column modified with cysteine was synthesized and characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, thermal gravimetric analysis, specific surface area analysis and pore size distribution analysis. The influences of analytical parameters such as sample pH, adsorption time, eluent type, and coexisting ions were examined. The limit of detection (LOD) and limit of quantification (LOQ) for Cr(iii) ions were 0.005 μg mL-1 and 0.017 μg mL-1, and the relative standard deviation (RSD) was 7.4% (n = 5). The prepared cysteine functionalized monolithic column displayed good enrichment capacity and was successfully applied to the determination of Cr(iii) ions in real samples.
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Affiliation(s)
- Dan Liu
- School of Chemical and Environmental Engineering, Jiangsu University of Technology Changzhou 213001 P. R. China
| | - Junli Pan
- School of Chemical and Environmental Engineering, Jiangsu University of Technology Changzhou 213001 P. R. China
| | - Jianghong Tang
- School of Chemical and Environmental Engineering, Jiangsu University of Technology Changzhou 213001 P. R. China
| | - Ning Lian
- School of Chemical and Environmental Engineering, Jiangsu University of Technology Changzhou 213001 P. R. China
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Zhang Z, Zhu N, Dong S, Huang M, Yang L, Wu X, Liu Z, Jiang J, Zou Y. Plasmonic ELISA Based on Nanospherical Brush-Induced Signal Amplification for the Ultrasensitive Naked-Eye Simultaneous Detection of the Typical Tetrabromobisphenol A Derivative and Byproduct. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:2996-3002. [PMID: 28762732 DOI: 10.1021/acs.jafc.7b02803] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
On the basis of H2O2-mediated growth of gold nanoparticle (AuNPs), a novel plasmonic enzyme-linked immunosorbent assay (pELISA) was developed with a polyclonal antibody for the ultrasensitive simultaneous naked-eye detection of tetrabromobisphenol A bis(2-hydroxyetyl) ether (TBBPA DHEE) and tetrabromobisphenol A mono(hydroxyethyl) ether (TBBPA MHEE), one of the major derivatives and byproducts of tetrabromobisphenol A (TBBPA), respectively. In this modified indirect competitive pELISA, glucose oxidase (GOx) played an important role leading to the growth of AuNPs through a reaction between GOx and glucose to produce hydrogen peroxide (H2O2). In addition, further signal amplification was achieved via a large number of GOx molecules, which were immobilized on silica nanoparticles carrying poly brushes (SiO2@PAA) to increase the enzyme load, and the whole complex was conjugated on the second antibody. Under the optimized conditions, 10-3 μg/L TBBPA DHEE can be distinguished via the observation of a colored solution, and the limit of detection (LOD) of the method using a microplate reader reaches 3.3 × 10-4 μg/L. In contrast, the sensitivity of the method was 3 orders of magnitude higher than that using conventional colorimetric ELISA with the same antibody. Furthermore, the proposed approach showed good repeatability and reliability after a recovery test fortified with a variety of targets was performed (recoveries, 78.00-102.79%; coefficient of variation (CV), 4.38-9.87%). To our knowledge, this is the first case in which pELISA was applied for the detection of small molecules via the production of H2O2 from GOx and glucose. The method will be widely used for the investigation of TBBPA DHEE and TBBPA MHEE in real environments.
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Affiliation(s)
- Zhen Zhang
- School of the Environment and Safety Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Nuanfei Zhu
- School of the Environment and Safety Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Shuaibing Dong
- School of the Environment and Safety Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Menglu Huang
- School of the Environment and Safety Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Liuqing Yang
- School of Chemistry & Chemical Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Xiangyang Wu
- School of the Environment and Safety Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Zhenjiang Liu
- School of the Environment and Safety Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Jiahao Jiang
- School of the Environment and Safety Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Yanmin Zou
- School of Pharmacy , Jiangsu University , Zhenjiang 212013 , China
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Advantages, Disadvantages and Modifications of Conventional ELISA. SPRINGERBRIEFS IN APPLIED SCIENCES AND TECHNOLOGY 2018. [DOI: 10.1007/978-981-10-6766-2_5] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Shu Q, Liu M, Ouyang H, Fu Z. Label-free fluorescent immunoassay for Cu 2+ ion detection based on UV degradation of immunocomplex and metal ion chelates. NANOSCALE 2017; 9:12302-12306. [PMID: 28820224 DOI: 10.1039/c7nr04087c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A mouse anti Cu2+-EDTA monoclonal antibody was used to capture EDTA chelated Cu2+ ions. Then UV radiation was utilized to degrade immunocomplex and Cu2+-EDTA chelates to release free Cu2+ ions. Based on their quenching effect to the fluorescent emission of CdSe/ZnS quantum dots, the released Cu2+ ions could be detected with ideal specificity and high sensitivity.
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Affiliation(s)
- Qi Shu
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
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WAN Z, ZHONG L, PAN Y, LI H, ZOU Q, SU K, WANG P. Portable Microplate Analyzer with a Thermostatic Chamber Based on a Smartphone for On-site Rapid Detection. ANAL SCI 2017; 33:1291-1296. [DOI: 10.2116/analsci.33.1291] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Zijian WAN
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University
- State Key Laboratory of Transducer Technology, Chinese Academy of Sciences
| | - Longjie ZHONG
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University
| | - Yuxiang PAN
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University
| | - Hongbo LI
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University
| | - Quchao ZOU
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University
| | - Kaiqi SU
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University
| | - Ping WANG
- Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University
- State Key Laboratory of Transducer Technology, Chinese Academy of Sciences
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