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Qian W, Zhou J, Chen Y, Liu H, Ding P, Liu Y, Liang C, Zhu X, Zhang Y, Liu E, Wang A, Zhang G. Label-free electrochemical immunosensor based on staphylococcal protein a and AgNPs-rGO-Nf for sensitive detection of virginiamycin M1. Bioelectrochemistry 2023; 153:108489. [PMID: 37354640 DOI: 10.1016/j.bioelechem.2023.108489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/28/2023] [Accepted: 06/09/2023] [Indexed: 06/26/2023]
Abstract
Virginiamycin (VIR), a feed additive, is used to promote pig and poultry growth. However, it is hazardous to human health. This work described a label-free electrochemical immunosensor based on silver nanoparticles-reduced graphene oxide (AgNPs-rGO) nanocomposites and staphylococcal protein A (SPA) for the first time to directly detect the residual marker VIR M1. Good catalytic currents for oxygen reduction reaction were apparently obtained after the modification of nanocomposites on gold electrode. Nanocomposites were characterized using UV-Vis, X-ray diffraction (XRD) patterns, Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). SPA was targeted to immobilize VIR M1 monoclonal antibody (mAb) by binding to Fc region of antibody. The proposed immunosensor showed a wide linear range from 0.25 ng mL-1 to 100 ng mL-1, providing detection limit (LOD) of 0.18 ng mL-1 of VIR M1. Recovery rates ranged from 92.27% to 98.84%, and relative standard deviation (RSD) was not above 6.6%, indicating the immunosensor could detect VIR M1 in actual samples with high accuracy. The sensor showed good selectivity, reproducibility and stability and could be considered as a potential tool for detection of VIR M1 in feed and animal derived food.
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Affiliation(s)
- Wenjing Qian
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Jingming Zhou
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Yumei Chen
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Longhu Laboratory of Advanced Immunology, Zhengzhou 450002, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Hongliang Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Peiyang Ding
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Longhu Laboratory of Advanced Immunology, Zhengzhou 450002, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Yankai Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Chao Liang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Xifang Zhu
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Ying Zhang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Enping Liu
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China
| | - Aiping Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Longhu Laboratory of Advanced Immunology, Zhengzhou 450002, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China.
| | - Gaiping Zhang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; Longhu Laboratory of Advanced Immunology, Zhengzhou 450002, China; Henan Key Laboratory of Immunobiology, Zhengzhou 450001, China; School of Advanced Agricultural Sciences, Peking University, Beijing 100871, China.
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Tian R, Ren Y, Wang T, Cao J, Li J, Deng A. A SERS-based lateral flow immunochromatographic assay using Raman reporter mediated-gap AuNR@Au nanoparticles as the substrate for the detection of enrofloxacin in food samples. Anal Chim Acta 2023; 1257:341152. [PMID: 37062566 DOI: 10.1016/j.aca.2023.341152] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/19/2023] [Accepted: 03/27/2023] [Indexed: 04/01/2023]
Abstract
A lateral flow immunochromatographic assay (LFIA) based on surface-enhanced Raman scattering (SERS) for sensitive and specific detection of antibiotic enrofloxacin (ENR) in food samples was developed. 1,4-benzenedithiol (BDT) was selected as the Raman reporter, and the BDT mediated-gap AuNR@Au nanoparticles (NPs) were synthesized, characterized and used as the substrate in SERS-LFIA due to the existence of the anisotropic gold nanorods (AuNRs) and the nano-gap with the high SERS enhancement. AuNRs were prepared, then covered by monolayer BDT. Under reduction condition and in presence of HAuCl4, the reduced gold was deposited and grown on AuNRs to form AuNRBDT@Au NPs. As the two thiol groups on para-positions in BDT were respectively linked to AuNR (core) and Au (shell), the gap size inside the NPs was uniform. The immunoprobe (e.g. AuNRBDT@Au-Ab) was obtained by immobilizing Ab against ENR on the surface of AuNRBDT@Au NPs. The performance of SERS-LFIA was similar to that in colloidal gold based-LFIA, and the entire assay time was within 15 min. After LFIA procedures, the specific SERS intensity of BDT at 1560 cm-1 on the test line was measured for the quantitative detection of ENR. The IC50 and limit of detection (LOD) of the LFIA for ENR were 59 pg mL-1 and 0.12 pg mL-1 (e.g. 71 pg g-1 and 0.14 pg g-1 in real sample), respectively. There was no cross-reactivity (CR) of the LFIA with other five antibiotics. The recoveries of ENR from spiked food samples were in range of 89.2%-102.4% with the relative standard deviation (RSD) of 1.70%-6.38%. It was proven that the proposed method was able to simply and rapidly detect ENR in food samples with high sensitivity, specificity, accuracy and precision. The platform can be also an alternative platform for the detection of other target analytes using corresponding Abs.
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Lv L, Zhang B, Tian P, Xie L, Wei W, He J, Lin M, Zhu H, Chen H, He B. A “signal off” aptasensor based on AuNPs/Ni-MOF substrate-free catalyzed for detection Enrofloxacin. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Wang BY, Gu BC, Wang GJ, Yang YH, Wu CC. Detection of Amyloid-β(1–42) Aggregation With a Nanostructured Electrochemical Sandwich Immunoassay Biosensor. Front Bioeng Biotechnol 2022; 10:853947. [PMID: 35372290 PMCID: PMC8965719 DOI: 10.3389/fbioe.2022.853947] [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: 01/13/2022] [Accepted: 02/25/2022] [Indexed: 11/30/2022] Open
Abstract
Amyloid-β(1–42) [Aβ(1–42)] oligomer accumulations are associated with physiologic alterations in the brains of individuals with Alzheimer’s disease. In this study, we demonstrate that a nanostructured gold electrode with deposited gold nanoparticles, induced via electrochemical impedance spectroscopy (EIS), may be used as an Aβ(1–42) conformation biosensor for the detection of Alzheimer’s disease. Monoclonal antibodies (12F4) were immobilized on self-assembled monolayers of the electrochemical sandwich immunoassay biosensor to capture Aβ(1–42) monomers and oligomers. Western blot and fluorescence microscopy analyses were performed to confirm the presence of Aβ(1–42) monomers and oligomers. EIS analysis with an equivalent circuit model was used to determine the concentrations of different Aβ(1–42) conformations in this study. We identified conformations of Aβ(1–42) monomers and Aβ(1–42) oligomers using probe antibodies (12F4) by employing EIS. RAβ(1−42) indicates the sum resistance of impedance measured during Aβ(1–42) immobilization. ΔR12F4 refers to the concentration of probe antibody (12F4) binding with Aβ(1–42). The concentration of Aβ(1–42) oligomer was defined as the percentage of Aβ(1–42) aggregation R12F4/RAβ(1−42). The experimental results show that the biosensor has high selectivity to differentiate Aβ(1–40) and Aβ(1–42) monomers and Aβ(1–42) oligomers and that it can detect Aβ(1–42) oligomer accurately. The linear detection range for Aβ(1–42) oligomers was between 10 pg/ml and 100 ng/ml. The limit of detection was estimated to be 113 fg/ml.
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Affiliation(s)
- Bing-Yu Wang
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Bien-Chen Gu
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Gou-Jen Wang
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Yuan-Han Yang
- Department of and Master's Program in Neurology, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Neurology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Neurology, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Che Wu
- Department of Mechanical Engineering, National Chung Hsing University, Taichung, Taiwan
- Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taichung, Taiwan
- Smart Sustainable New Agriculture Research Center (SMARTer), Taichung, Taiwan
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Aymard C, Kanso H, Serrano MJ, Pagán R, Noguer T, Istamboulie G. Development of a new dual electrochemical immunosensor for a rapid and sensitive detection of enrofloxacin in meat samples. Food Chem 2022; 370:131016. [PMID: 34507208 DOI: 10.1016/j.foodchem.2021.131016] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/24/2021] [Accepted: 08/29/2021] [Indexed: 01/21/2023]
Abstract
A novel dual electrochemical immunosensor was fabricated for the rapid and sensitive detection of enrofloxacin (EF) antibiotic in meat. Anti-quinolone antibody was immobilized onto screen-printed dual carbon electrodes via carbodiimide coupling. A new electrochemical probe was synthesized by conjugating difloxacin and aminoferrocene, whose oxidation was measured at + 0.2 V vs. Ag/AgCl by differential pulse voltammetry. The detection principle was based on the competitive binding of this conjugate and free EF on immobilized antibodies. The proposed immunosensor allowed detection of EF at concentrations ranging from 0.005 µg.mL-1 to 0.01 µg.mL-1 with a detection limit of 0.003 µg.mL-1. The immunosensor was stable for at least 1 month at 4 °C and displayed a good specificity for other fluoroquinolones. The new dual electrode design offered an improved accuracy as one electrode was used as negative control. The efficiency of the sensor and the adequacy of the extraction process were finally validated by detecting EF in different meat samples.
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Affiliation(s)
- Chloé Aymard
- Université de Perpignan Via Domitia, Biocapteurs-Analyse-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Hussein Kanso
- Université de Perpignan Via Domitia, Biocapteurs-Analyse-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - María Jesús Serrano
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Rafael Pagán
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón-IA2 (Universidad de Zaragoza-CITA), Zaragoza, Spain
| | - Thierry Noguer
- Université de Perpignan Via Domitia, Biocapteurs-Analyse-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Georges Istamboulie
- Université de Perpignan Via Domitia, Biocapteurs-Analyse-Environnement, 66860 Perpignan, France; Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR 3579 Sorbonne Universités (UPMC) Paris 6 et CNRS Observatoire Océanologique, 66650 Banyuls-sur-Mer, France.
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6
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Lei X, Xu X, Liu L, Kuang H, Xu L, Xu C. Immunochromatographic assays for ultrasensitive and high specific determination of enrofloxacin in milk, eggs, honey, and chicken meat. J Dairy Sci 2022; 105:1999-2010. [PMID: 34998562 DOI: 10.3168/jds.2021-20276] [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: 02/09/2021] [Accepted: 05/24/2021] [Indexed: 01/25/2023]
Abstract
Enrofloxacin, a veterinary antibiotic that persists in food, poses a risk to human health. Here, a monoclonal antibody against enrofloxacin, 1H12, was prepared based on the hapten ENR-1, and showed excellent sensitivity with a 50% inhibitory concentration (IC50) of 0.03 ng/mL. Using this antibody, 2 lateral-flow immunochromatographic assays were developed for determination of enrofloxacin in egg, milk, honey, and chicken meat samples. The detection ranges (IC20-IC80) were 0.16-0.82 ng/g, 0.24-1.8 ng/g, 0.25-3.6 ng/g, and 0.61-3.9 ng/g by colloidal gold-immunochromatographic sensor (CG-ICS) analysis, and 0.022-0.42 ng/g, 0.054-0.42 ng/g, 0.069-1.4 ng/g, and 0.19-2.2 ng/g by Eu-fluorescence-immunochromatographic sensor (EF-ICS) analysis. The intraassay and interassay recovery rates were 88.9 to 108.5% with coefficients of variation of 1.3 to 7.0% by CG-ICS analysis, and 88.6 to 113.6% with coefficients of variation of 1.3 to 8.1% by EF-ICS analysis. Thus, our newly developed ICS are sensitive and reliable, providing an option for rapid quantitative detection of enrofloxacin in food samples.
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Affiliation(s)
- Xianlu Lei
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China; International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China
| | - Xinxin Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China; International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China
| | - Liqiang Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China; International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China.
| | - Hua Kuang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China; International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China
| | - Liguang Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China; International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China
| | - Chuanlai Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China; International Joint Research Laboratory for Biointerface and Biodetection, and School of Food Science and Technology, Jiangnan University, Wuxi, 214121, People's Republic of China.
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7
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Lin CY, Nhat Nguyen UT, Hsieh HY, Tahara H, Chang YS, Wang BY, Gu BC, Dai YH, Wu CC, Tsai IJ, Fan YJ. Peptide-based electrochemical sensor with nanogold enhancement for detecting rheumatoid arthritis. Talanta 2022; 236:122886. [PMID: 34635266 DOI: 10.1016/j.talanta.2021.122886] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/12/2021] [Accepted: 09/12/2021] [Indexed: 01/30/2023]
Abstract
Rheumatoid arthritis (RA), an autoimmune and chronic inflammatory disorder, is an incurable disease. We developed a peptide-based electrochemical sensor using electrochemical impedance spectroscopy that can be used to detect autoantibodies for RA diagnostics. We first validated that the developed peptide showed high sensitivity and could compliment the current gold standard method of an anti-cyclic citrullinated peptide antibody (anti-CCP) ELISA. The developed peptide can be modified on the nanogold surface of the working electrode of sensing chips through the method of a self-assembling monolayer. The sensing process was first optimized using a positive control cohort and a healthy control cohort. Subsequently, 10 clinically confirmed samples from RA patients and five healthy control samples were used to find the threshold value of the impedance between RA and healthy subjects. Furthermore, 10 clinically confirmed samples but with low values of anti-CCP autoantibodies were used to evaluate the sensitivity of the present method compared to the conventional method. The proposed method showed better sensitivity than the current conventional anti-CCP ELISA method.
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Affiliation(s)
- Ching-Yu Lin
- PhD Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, 250 Wuxing St., Taipei, 11031, Taiwan
| | - Uyen Thi Nhat Nguyen
- International PhD Program for Cell Therapy and Regeneration Medicine, Taipei Medical University, 250 Wuxing St., Taipei, 11031, Taiwan
| | - Han-Yun Hsieh
- Graduate School of Biomedical & Health Sciences, Hiroshima University, Kausmi 1-2-3, Minami-ku, Hiroshima, 734-8553, Japan; Institute of Applied Mechanics, National Taiwan University, 1 Roosevelt Road, Sec. 4, Taipei, 10617, Taiwan
| | - Hidetoshi Tahara
- Graduate School of Biomedical & Health Sciences, Hiroshima University, Kausmi 1-2-3, Minami-ku, Hiroshima, 734-8553, Japan
| | - Yu-Sheng Chang
- Division of Allergy, Immunology and Rheumatology, Shuang Ho Hospital, 291 Zhongzheng Rd., Zhonghe District, New Taipei City, 23561, Taiwan; Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, 250 Wuxing St., Taipei, 11031, Taiwan
| | - Bing-Yu Wang
- Department of Mechanical Engineering, National Chung-Hsing University, 145 Xingda Rd., South Dist., Taichung, 40227, Taiwan
| | - Bing-Chen Gu
- Vida BioTechnology Co., Ltd. Taiwan, 145 Xingda Rd., South Dist., Taichung, 402, Taiwan
| | - Yu-Han Dai
- Vida BioTechnology Co., Ltd. Taiwan, 145 Xingda Rd., South Dist., Taichung, 402, Taiwan
| | - Chia-Che Wu
- Department of Mechanical Engineering, National Chung-Hsing University, 145 Xingda Rd., South Dist., Taichung, 40227, Taiwan
| | - I-Jung Tsai
- PhD Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, 250 Wuxing St., Taipei, 11031, Taiwan
| | - Yu-Jui Fan
- International PhD Program for Cell Therapy and Regeneration Medicine, Taipei Medical University, 250 Wuxing St., Taipei, 11031, Taiwan; International PhD Program for Biomedical Engineering, School of Biomedical Engineering, Taipei Medical University, 250 Wuxing St., Taipei, 11031, Taiwan.
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Özge Karaşallı M, Derya Koyuncu Zeybek. A Novel Label-Free Immunosensor Based on Electrochemically Reduced Graphene Oxide for Determination of Hemoglobin A1c. RUSS J ELECTROCHEM+ 2020. [DOI: 10.1134/s1023193520090037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lin CH, Lin MJ, Huang JD, Chuang YS, Kuo YF, Chen JC, Wu CC. Label-Free Impedimetric Immunosensors Modulated by Protein A/Bovine Serum Albumin Layer for Ultrasensitive Detection of Salbutamol. SENSORS 2020; 20:s20030771. [PMID: 32023863 PMCID: PMC7038488 DOI: 10.3390/s20030771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/24/2020] [Accepted: 01/30/2020] [Indexed: 11/16/2022]
Abstract
The sensing properties of immunosensors are determined not only by the amount of immobilized antibodies but also by the number of effective antigen-binding sites of the immobilized antibody. Protein A (PA) exhibits a high degree of affinity with the Fc part of IgG antibody to feasibly produce oriented antibody immobilization. This work proposes a simple method to control the PA surface density on gold nanostructure (AuNS)-deposited screen-printed carbon electrodes (SPCEs) by mixing concentration-varied PA and bovine serum albumin (BSA), and to explore the effect of PA density on the affinity attachment of anti-salbutamol (SAL) antibodies by electrochemical impedance spectroscopy. A concentration of 100 μg/mL PA and 100 μg/mL BSA can obtain a saturated coverage on the 3-mercaptoproponic acid (MPA)/AuNS/SPCEs and exhibit a 50% PA density to adsorb the amount of anti-SAL, more than other concentration-varied PA/BSA-modified electrodes. Compared with the randomly immobilized anti-SAL/MPA/AuNS/SPCEs and the anti-SAL/PA(100 μg/mL):BSA(0 μg/mL)/MPA/AuNS/SPCE, the anti-SAL/PA(100 μg/mL): BSA(100 μg/mL)/MPA/AuNS/SPCE-based immunosensors have better sensing properties for SAL detection, with an extremely low detection limit of 0.2 fg/mL and high reproducibility (<2.5% relative standard deviation). The mixture of PA(100 μg/mL):BSA(100 μg/mL) for the modification of AuNS/SPCEs has great promise for forming an optimal protein layer for the oriented adsorption of IgG antibodies to construct ultrasensitive SAL immunosensors.
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Affiliation(s)
- Chia-Hung Lin
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City 402, Taiwan; (C.-H.L.); (M.-J.L.); (J.-D.H.); (Y.-S.C.)
| | - Ming-Jie Lin
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City 402, Taiwan; (C.-H.L.); (M.-J.L.); (J.-D.H.); (Y.-S.C.)
| | - Jie-De Huang
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City 402, Taiwan; (C.-H.L.); (M.-J.L.); (J.-D.H.); (Y.-S.C.)
| | - Yu-Sheng Chuang
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City 402, Taiwan; (C.-H.L.); (M.-J.L.); (J.-D.H.); (Y.-S.C.)
| | - Yu-Fen Kuo
- Metal Industries Research & Development Centre, Kaohsiung 811, Taiwan;
| | - Jung-Chih Chen
- Institute of Biomedical Engineering, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan
- Correspondence: (J.-C.C.); (C.-C.W.); Tel.: +886-3-5712-121 (ext. 54047) (J.-C.C.); +886-4-2285-1268 (C.-C.W.)
| | - Ching-Chou Wu
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City 402, Taiwan; (C.-H.L.); (M.-J.L.); (J.-D.H.); (Y.-S.C.)
- Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, No. 145, Xingda Rd., South Dist., Taichung City 402, Taiwan
- Correspondence: (J.-C.C.); (C.-C.W.); Tel.: +886-3-5712-121 (ext. 54047) (J.-C.C.); +886-4-2285-1268 (C.-C.W.)
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10
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Covalent organic framework-based electrochemical aptasensors for the ultrasensitive detection of antibiotics. Biosens Bioelectron 2019; 132:8-16. [PMID: 30851495 DOI: 10.1016/j.bios.2019.02.040] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/08/2019] [Accepted: 02/13/2019] [Indexed: 01/10/2023]
Abstract
We designed and synthesized a novel covalent organic framework (COF) by condensation polymerization of 1,3,6,8-tetrakis(4-formylphenyl)pyrene and melamine through imine bonds (represented by Py-M-COF). The basic characterizations revealed that the Py-M-COF not only exhibited an extended π-conjugation framework, a large specific surface area (495.5 m2 g-1), big pore cavities, and nanosheet-like structure but also possessed rich functional groups, such as C˭C, C˭N, C˭O, and NH2. These features endowed the Py-M-COF with high charge carrier mobility, further improving the strong immobilization of DNA aptamer strands via π-π stacking interaction and electrostatic interaction. As such, the Py-M-COF-based electrochemical aptasensors are ultrasensitive in detecting different antibiotics, including enrofloxacin (ENR) and ampicillin (AMP), yielding extremely low detection limits of 6.07 and 0.04 fg mL-1 (S/N = 3) toward ENR and AMP, respectively, along with other excellent sensing performances. This biosensing platform based on Py-M-COF has potential applications for the sensitive detection of antibiotics or other analytes by replacing the corresponding aptamers.
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Tufa LT, Oh S, Tran VT, Kim J, Jeong KJ, Park TJ, Kim HJ, Lee J. Electrochemical immunosensor using nanotriplex of graphene quantum dots, Fe3O4, and Ag nanoparticles for tuberculosis. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.09.108] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Pan M, Li S, Wang J, Sheng W, Wang S. Development and Validation of a Reproducible and Label-Free Surface Plasmon Resonance Immunosensor for Enrofloxacin Detection in Animal-Derived Foods. SENSORS 2017; 17:s17091984. [PMID: 28867795 PMCID: PMC5621032 DOI: 10.3390/s17091984] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/05/2017] [Accepted: 08/28/2017] [Indexed: 01/24/2023]
Abstract
This study describes the development of a reproducible and label-free surface plasmon resonance (SPR) immunosensor and its application in the detection of harmful enrofloxacin (ENRO) in animal-derived foods. The experimental parameters for the immunosensor construction and regeneration, including the pH value (4.5), concentration for coating ENRO-ovalbumin conjugate (ENRO-OVA) (100 μg·mL−1), concentration of anti-ENRO antibody (80 nM) and regeneration solution (0.1 mol·L−1 HCl) were evaluated in detail. With the optimized parameters, the proposed SPR immunosensor obtained a good linear response to ENRO with high sensitivity (IC50: 3.8 ng·mL−1) and low detection limit (IC15: 1.2 ng·mL−1). The proposed SPR immunosensor was further validated to have favorable performances for ENRO residue detection in typical animal-derived foods after a simple matrix pretreatment procedure, as well as acceptable accuracy (recovery: 84.3–96.6%), precision (relative standard deviation (n = 3): 1.8–4.6%), and sensitivity (IC15 ≤ 8.4 ng·mL−1). Each SPR chip for analysis can be reused at least 100 times with good stability and the analysis cycle containing the steps of sample uploading/chip regeneration/baseline recovery can be completed within 6 min (one cycle) and auto-operated by a predetermined program. These results demonstrated that the proposed SPR immunosensor provided an effective strategy for accurate, sensitive, and rapid detection for ENRO residue, which has great potential for routine analysis of large numbers of samples for measuring different types of compounds.
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Affiliation(s)
- Mingfei Pan
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Shijie Li
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Junping Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Wei Sheng
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Shuo Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China.
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LIN CH, LIN MJ, WU CC. Effect of the Chain Length of a Modified Layer and Surface Roughness of an Electrode on Impedimetric Immunosensors. ANAL SCI 2017; 33:327-333. [DOI: 10.2116/analsci.33.327] [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)
- Chia-Hung LIN
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University
| | - Ming-Jie LIN
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University
| | - Ching-Chou WU
- Department of Bio-industrial Mechatronics Engineering, National Chung Hsing University
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A high sensitive impedimetric salbutamol immunosensor based on the gold nanostructure-deposited screen-printed carbon electrode. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.02.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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15
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Comparison of Electrochemical Immunosensors and Aptasensors for Detection of Small Organic Molecules in Environment, Food Safety, Clinical and Public Security. BIOSENSORS-BASEL 2016; 6:bios6010007. [PMID: 26938570 PMCID: PMC4810399 DOI: 10.3390/bios6010007] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/16/2016] [Accepted: 02/19/2016] [Indexed: 01/03/2023]
Abstract
We review here the most frequently reported targets among the electrochemical immunosensors and aptasensors: antibiotics, bisphenol A, cocaine, ochratoxin A and estradiol. In each case, the immobilization procedures are described as well as the transduction schemes and the limits of detection. It is shown that limits of detections are generally two to three orders of magnitude lower for immunosensors than for aptasensors, due to the highest affinities of antibodies. No significant progresses have been made to improve these affinities, but transduction schemes were improved instead, which lead to a regular improvement of the limit of detections corresponding to ca. five orders of magnitude over these last 10 years. These progresses depend on the target, however.
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16
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Evaluation of protein immobilization capacity on various carbon nanotube embedded hydrogel biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:132-40. [DOI: 10.1016/j.msec.2015.06.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 04/14/2015] [Accepted: 06/09/2015] [Indexed: 11/23/2022]
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17
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Deng Y, Gasilova N, Qiao L, Zhou YL, Zhang XX, Girault HH. Highly sensitive detection of five typical fluoroquinolones in low-fat milk by field-enhanced sample injection-based CE in bubble cell capillary. Electrophoresis 2014; 35:3355-62. [DOI: 10.1002/elps.201400294] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 08/05/2014] [Accepted: 08/11/2014] [Indexed: 01/19/2023]
Affiliation(s)
- Yan Deng
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing China
- Laboratoire d'Electrochimie Physique et Analytique; Ecole Polytechnique Fédérale de Lausanne; Lausanne Switzerland
| | - Natalia Gasilova
- Laboratoire d'Electrochimie Physique et Analytique; Ecole Polytechnique Fédérale de Lausanne; Lausanne Switzerland
| | - Liang Qiao
- Laboratoire d'Electrochimie Physique et Analytique; Ecole Polytechnique Fédérale de Lausanne; Lausanne Switzerland
| | - Ying-Lin Zhou
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing China
| | - Xin-Xiang Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education; College of Chemistry; Peking University; Beijing China
| | - Hubert H. Girault
- Laboratoire d'Electrochimie Physique et Analytique; Ecole Polytechnique Fédérale de Lausanne; Lausanne Switzerland
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18
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Ni H, Zhang S, Ding X, Mi T, Wang Z, Liu M. Determination of Enrofloxacin in Bovine Milk by a Novel Single-Stranded DNA Aptamer Chemiluminescent Enzyme Immunoassay. ANAL LETT 2014. [DOI: 10.1080/00032719.2014.924009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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19
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Polonschii C, David S, Gáspár S, Gheorghiu M, Rosu-Hamzescu M, Gheorghiu E. Complementarity of EIS and SPR to reveal specific and nonspecific binding when interrogating a model bioaffinity sensor; perspective offered by plasmonic based EIS. Anal Chem 2014; 86:8553-62. [PMID: 25126676 DOI: 10.1021/ac501348n] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The present work compares the responses of a model bioaffinity sensor based on a dielectric functionalization layer, in terms of specific and nonspecific binding, when interrogated simultaneously by Surface Plasmon Resonance (SPR), non-Faradaic Electrochemical Impedance Spectroscopy (EIS), and Plasmonic based-EIS (P-EIS). While biorecognition events triggered a sensitive SPR signal, the related EIS response was rather negligible. Contrarily, even a limited nonspecific adsorption onto the surface of the metallic electrode, allowed by the intrinsic imperfect compactness of the functionalization layers, was signaled by EIS and not by SPR. The source of this finding has been addressed from both theoretical and experimental perspectives, demonstrating that EIS signals are mainly sensitive to adsorptions that alter the current pathway through defects of the functionalization layer exposing the electrode. These observations are of importance for those developing biosensors analyzed by SPR, EIS, or the novel combination of the two methods (P-EIS). A possible application of the observed complementarity of the two methods, namely assessment of sample purity in respect to a target analyte is highlighted. Moreover, the possibility of false-positive EIS responses (determined by nonspecific binding) when assessing samples containing complex matrices or consisting of small molecular weight analytes is emphasized.
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Affiliation(s)
- Cristina Polonschii
- International Centre of Biodynamics , 1B Intrarea Portocalelor, 060101 Bucharest, Romania
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Wang Z, Zhang H, Ni H, Zhang S, Shen J. Development of a highly sensitive and specific immunoassay for enrofloxacin based on heterologous coating haptens. Anal Chim Acta 2014; 820:152-8. [DOI: 10.1016/j.aca.2014.02.043] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 02/17/2014] [Accepted: 02/26/2014] [Indexed: 11/25/2022]
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21
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One-step porous gold fabricated electrode for electrochemical impedance spectroscopy immunosensor detection. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.08.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Derkus B, Cebesoy Emregul K, Mazi H, Emregul E, Yumak T, Sinag A. Protein A immunosensor for the detection of immunoglobulin G by impedance spectroscopy. Bioprocess Biosyst Eng 2013; 37:965-76. [DOI: 10.1007/s00449-013-1068-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 09/20/2013] [Indexed: 11/29/2022]
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23
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Wu CC, Yang DJ. A label-free impedimetric DNA sensing chip integrated with AC electroosmotic stirring. Biosens Bioelectron 2013; 43:348-54. [DOI: 10.1016/j.bios.2012.12.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 11/29/2012] [Accepted: 12/13/2012] [Indexed: 10/27/2022]
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24
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Emregul E, Kocabay O, Derkus B, Yumak T, Emregul KC, Sınag A, Polat K. A novel carboxymethylcellulose–gelatin–titanium dioxide–superoxide dismutase biosensor; electrochemical properties of carboxymethylcellulose–gelatin–titanium dioxide–superoxide dismutase. Bioelectrochemistry 2013; 90:8-17. [DOI: 10.1016/j.bioelechem.2012.09.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/03/2012] [Accepted: 09/17/2012] [Indexed: 01/05/2023]
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25
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Myelin basic protein immunosensor for multiple sclerosis detection based upon label-free electrochemical impedance spectroscopy. Biosens Bioelectron 2013; 46:53-60. [PMID: 23500477 DOI: 10.1016/j.bios.2013.01.060] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Revised: 01/29/2013] [Accepted: 01/30/2013] [Indexed: 01/05/2023]
Abstract
A novel highly sensitive impedimetric Myelin Basic Protein (MBP) immunosensor for the determination of a Multiple Sclerosis (MS) autoantibody, Anti-Myelin Basic Protein (Anti-MBP) was developed by immobilization of MBP on Gelatin and Gelatin-Titanium Dioxide (TiO₂) modified platinium electrode. Cyclic voltammetric (CV) and Electrochemical Impedance Spectroscopic (EIS) methods were employed in determination of the electrode responses and applicability. Gelatin-MBP and gelatin-TiO₂-MBP electrodes were prepared by chemical immobilization of the substrates onto the platinium electrodes. The formal potentials of MBP confined on gelatin-MBP and gelatin-TiO₂-MBP surfaces are estimated to be 195 and 205 mV, respectively. Thus, a little more reversible electron transfer reaction occurs on the gelatin-TiO₂-MBP immunosensor surface. The peak separations of MBP (150 mV and 110 mV s(-1) at 100 mV s(-1)) and the asymmetric anodic and cathodic peak currents indicate that the electron transfer between Anti-MBP and gelatin-MBP/gelatin-TiO₂-MBP immunosensor is quasireversible. Control samples containing a nonspecific human immunoglobulin G (hIgG) antibody were also studied, and calibration curves were obtained by subtraction of the responses for specific and nonspecific antibody-based sensors. Gelatin-MBP and gelatin-TiO₂-MBP immunosensors have detection limit of 0.1528 ng ml(-1) and 0.1495 ng ml(-1) respectively. This immunosensor exhibits high sensitivity and low response times (58 s for gelatin-MBP and 46 s for gelatin-TiO₂-MBP immunosensor). The developed label-free impedimetric immunosensors also provide a simple and sensitive detection method for the specific determination of Anti-MBP in human cerebrospinal fluid (CSF) and serum samples.
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Araque E, Villalonga R, Gamella M, Martínez-Ruiz P, Reviejo J, Pingarrón JM. Crumpled reduced graphene oxide–polyamidoamine dendrimer hybrid nanoparticles for the preparation of an electrochemical biosensor. J Mater Chem B 2013; 1:2289-2296. [DOI: 10.1039/c3tb20078g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Holford TR, Davis F, Higson SP. Recent trends in antibody based sensors. Biosens Bioelectron 2012; 34:12-24. [DOI: 10.1016/j.bios.2011.10.023] [Citation(s) in RCA: 203] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 10/06/2011] [Accepted: 10/13/2011] [Indexed: 12/29/2022]
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28
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Bioelectrode for detection of human salivary amylase. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2011.12.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Lu J, Wang W, Wang S, Shan X, Li J, Tao N. Plasmonic-based electrochemical impedance spectroscopy: application to molecular binding. Anal Chem 2011; 84:327-33. [PMID: 22122514 DOI: 10.1021/ac202634h] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Plasmonic-based electrochemical impedance spectroscopy (P-EIS) is developed to investigate molecular binding on surfaces. Its basic principle relies on the sensitive dependence of surface plasmon resonance (SPR) signal on surface charge density, which is modulated by applying an ac potential to a SPR chip surface. The ac component of the SPR response gives the electrochemical impedance, and the dc component provides the conventional SPR detection. The plasmonic-based impedance measured over a range of frequency is in quantitative agreement with the conventional electrochemical impedance. Compared to the conventional SPR detection, P-EIS is sensitive to molecular binding taking place on the chip surface and less sensitive to bulk refractive index changes or nonspecific binding. Moreover, this new approach allows for simultaneous SPR and surface impedance analysis of molecular binding processes.
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Affiliation(s)
- Jin Lu
- Department of Chemistry, Beijing Key Laboratory for Microanalytical Methods and Instrumentation, Tsinghua University, Beijing 100084, China
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30
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A label-free immunosensor based on modified mesoporous silica for simultaneous determination of tumor markers. Biosens Bioelectron 2011; 29:40-5. [DOI: 10.1016/j.bios.2011.07.063] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Revised: 07/05/2011] [Accepted: 07/25/2011] [Indexed: 01/15/2023]
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31
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Development of an impedimetric immunosensor for the determination of 3-amino-2-oxazolidone residue in food samples. Anal Chim Acta 2011; 706:120-7. [DOI: 10.1016/j.aca.2011.08.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2010] [Revised: 08/07/2011] [Accepted: 08/08/2011] [Indexed: 11/18/2022]
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32
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Detecting 5-morpholino-3-amino-2-oxazolidone residue in food with label-free electrochemical impedimetric immunosensor. Food Control 2011. [DOI: 10.1016/j.foodcont.2011.03.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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33
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Khor SM, Liu G, Peterson JR, Iyengar SG, Gooding JJ. An Electrochemical Immunobiosensor for Direct Detection of Veterinary Drug Residues in Undiluted Complex Matrices. ELECTROANAL 2011. [DOI: 10.1002/elan.201100205] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Sheng W, Li Y, Xu X, Yuan M, Wang S. Enzyme-linked immunosorbent assay and colloidal gold-based immunochromatographic assay for several (fluoro)quinolones in milk. Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0560-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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35
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Huang J, Yang G, Meng W, Wu L, Zhu A, Jiao X. An electrochemical impedimetric immunosensor for label-free detection of Campylobacter jejuni in diarrhea patients' stool based on O-carboxymethylchitosan surface modified Fe3O4 nanoparticles. Biosens Bioelectron 2009; 25:1204-11. [PMID: 19932018 DOI: 10.1016/j.bios.2009.10.036] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 10/22/2009] [Accepted: 10/23/2009] [Indexed: 10/20/2022]
Abstract
A novel electrochemical impedimetric immunosensor based on O-carboxymethylchitosan surface modified Fe(3)O(4) nanoparticles (denoted as OCMCS-Fe(3)O(4) nanoparticles) was developed for rapid detection of Campylobacter jejuni, which is becoming the most common cause of gastroenteritis in developed countries and raising major public health concerns worldwide. In the present study, anti-FlaA monoclonal antibodies 2D12 (denoted as 2D12McAbs) were immobilized on OCMCS-Fe(3)O(4) nanoparticles. The detection was performed by measuring relative change in impedance before and after 2D12McAbs-Campylobacter jejuni reaction with the technique of electrochemical impedance spectroscopy. Under the optimized conditions, the relative change in impedance was proportional to the logarithmic value of Campylobacter jejuni concentrations in the range of 1.0x10(3) to 1.0x10(7) CFU/mL (r=0.991). The advantages of the OCMCS-Fe(3)O(4) nanoparticle-based immunosensor are simplicity of use, fast response, wide linear range, acceptable reproducibility and long stability. Moreover, the immunosensor could be regenerated by being treated with glycine-HCl buffer solution (pH 2.8). We demonstrate the convenient application of the novel immunosensor for the detection of Campylobacter jejuni in diarrhea patients' stool samples.
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Affiliation(s)
- Jinlin Huang
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, PR China
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