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Tasić N, Konjević I, Lobato A, Metarapi D, Finšgar M, Oliveira FM, Sofer Z, Gusmão R, Zhang X, Hočevar SB. Study of V 2CT x-MXene Based Immunosensor for Sensitive Label-Free Impedimetric Detection of SARS-CoV-2 Spike Protein. ACS APPLIED MATERIALS & INTERFACES 2024; 16:30196-30208. [PMID: 38814245 PMCID: PMC11181268 DOI: 10.1021/acsami.4c04567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 05/31/2024]
Abstract
Rapid and reliable immunosensing is undoubtedly one of the priorities in the efficient management and combat against a pandemic, as society has experienced with the SARS-CoV-2 outbreak; simple and cost-effective sensing strategies are at the forefront of these efforts. In this regard, 2D-layered MXenes hold great potential for electrochemical biosensing due to their attractive physicochemical properties. Herein, we present a V2CTx MXene-based sensing layer as an integral part of a label-free immunosensor for sensitive and selective detection of the SARS-CoV-2 spike protein. The sensor was fabricated on a supporting screen-printed carbon electrode using Nafion as an immobilizing agent for MXene and glutaraldehyde, the latter enabling effective binding of protein A for further site-oriented immobilization of anti-SARS-CoV-2 antibodies. A thorough structural analysis of the sensor architecture was carried out, and several key parameters affecting the fabrication and analytical performance of the immunosensor were investigated and optimized. The immunosensor showed excellent electroanalytical performance in combination with an impedimetric approach and exhibited a low detection limit of only 45 fM SARS-CoV-2 spike protein. Its practical applicability was successfully demonstrated by measuring the spike protein in a spiked artificial nasopharyngeal fluid sample.
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Affiliation(s)
- Nikola Tasić
- Department
of Analytical Chemistry, National Institute
of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
| | - Ivan Konjević
- Department
of Analytical Chemistry, National Institute
of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna
pot 113, 1000 Ljubljana, Slovenia
| | - Alnilan Lobato
- Department
of Analytical Chemistry, National Institute
of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
- International
Postgraduate School Jožef Štefan, Jamova 39, 1000 Ljubljana, Slovenia
| | - Dino Metarapi
- Department
of Analytical Chemistry, National Institute
of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
| | - Matjaž Finšgar
- Faculty
of Chemistry and Chemical Engineering, University
of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Filipa M. Oliveira
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 166 28 Praha 6-Dejvice, Czech Republic
| | - Zděnek Sofer
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 166 28 Praha 6-Dejvice, Czech Republic
| | - Rui Gusmão
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 166 28 Praha 6-Dejvice, Czech Republic
| | - Xueji Zhang
- School
of
Biomedical Engineering, Shenzhen University
Health Science Center, 3688 Nanhai Road, Nanshan District, Shenzhen 518054, Guangdong P.R. China
| | - Samo B. Hočevar
- Department
of Analytical Chemistry, National Institute
of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
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2
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Ali A, Khan S, Li Z. Electrochemiluminescent resonance energy transfer between amino-modified g-C 3N 4/Bi 2MoO 6 composite and carboxyl CoS 2 nanoboxes for sensitive detection of alpha fetoprotein. Talanta 2024; 271:125709. [PMID: 38290268 DOI: 10.1016/j.talanta.2024.125709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 01/15/2024] [Accepted: 01/22/2024] [Indexed: 02/01/2024]
Abstract
This work demonstrates an effective quenching electrochemiluminescent (ECL) immunosensor based on resonance energy transfer for the sensitive detection of alpha fetoprotein (AFP). In this strategy, graphitic carbon nitride (g-C3N4) was coupled with bismuth molybdenum oxide (Bi2MoO6) to form a g-C3N4/Bi2MoO6 nanocomposite as a novel type of ECL immunosensor. The as-synthesized amino-modified g-C3N4/Bi2MoO6 nanocomposite presents strong and stable cathodic ECL activity compared to pristine g-C3N4. One plausible reason is that the synergistic effect between the g-C3N4 and Bi2MoO6 could facilitate charge transfer process and thereby enhancing the separation efficiency of electron-hole pairs. The other functional part of the immunosensor, carboxyl CoS2 nanoboxes with a broad absorption range, was rationally designed and introduced. The evidence that the absorption spectra of carboxyl CoS2 NBs overlap with ECL spectra of g-C3N4/Bi2MoO6 nanocomposite holds accountable for exceptionally weakened ECL signal. This sandwich-type immunosensor was setup based on quenching mechanism concerning amino-modified g-C3N4/Bi2MoO6 as an ECL donor and carboxyl CoS2 NBs as an ECL accepter. The strategy was optimized to achieve a convincible and sensitive detection goal for AFP with a wide quantifiable range of 0.5 pg/mL-10 ng/mL whilst a sufficiently low detection limit of 0.04 pg/mL (S/N = 3). This immunosensor shows great potential for real sample analysis with reasonable recoveries ranging from 95.5 to 99.0 %, demonstrating its high precision for AFP determination.
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Affiliation(s)
- Asghar Ali
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, PR China
| | - Sonia Khan
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, PR China
| | - Zheng Li
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, PR China.
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3
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Liu Z, Wang J, Cui C, Zheng L, Hu L. Introducing AgNPs-VB2 composites as the dual signal quenching of CeO2–AuNPs-g-CNQDs hybrids for ultrasensitive “on-off” electrochemiluminescence immunosensing of prostate specific antigen. Talanta 2023; 252:123886. [DOI: 10.1016/j.talanta.2022.123886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/27/2022] [Accepted: 08/23/2022] [Indexed: 10/15/2022]
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4
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Hong F, Chen R, Lu P, Li L, Xiao R, Chen Y, Yang H. A universal, portable, and ultra-sensitive pipet immunoassay platform for deoxynivalenol detection based on dopamine self-polymerization-mediated bioconjugation and signal amplification. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129257. [PMID: 35739776 DOI: 10.1016/j.jhazmat.2022.129257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/18/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Deoxynivalenol (DON) is highly toxic to the environment and human health. It is important to detect DON with ultra-high sensitivity, ease of operation, and low cost. Inspired by the excellent stability and biocompatibility of polydopamine, a universal, portable and ultra-sensitive pipet immunoassay platform was reported for DON detection based on dopamine self-polymerization (polydopamine coating and polydopamine nanoparticles). The polydopamine coating acted as an effective strategy for biomolecule immobilization on the pipet to improve the coating efficiency that significantly reduced the required concentration of biomolecules. Performing the ELISA in pipets saved nearly 67% of the antigen amount and 83% of the antibody amount, which reduced the detection cost and simplified the experimental steps. The dual signal amplification in this pipet immunoassay enabled ultra-high sensitivity. Polydopamine nanoparticles acted as the enrichment carrier of horseradish peroxidase-goat anti-mouse IgG for the first-round signal amplification, followed by the tyramine-mediated loading of streptavidin-HRP for the second-round signal amplification. The dual-enriched HRP catalyzed the color-developing substrate to achieve highly sensitive colorimetric DON detection with a limit of detection of 0.435 ng/mL.
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Affiliation(s)
- Feng Hong
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China; Hubei Hong Shan Laboratory, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China
| | - Rui Chen
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China; Hubei Hong Shan Laboratory, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China
| | - Peng Lu
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China; Hubei Hong Shan Laboratory, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China
| | - Letian Li
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China; Hubei Hong Shan Laboratory, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China
| | - Ruiheng Xiao
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China; Hubei Hong Shan Laboratory, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China
| | - Yiping Chen
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, Guangdong, China; Hubei Hong Shan Laboratory, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China; Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan 430070, China.
| | - Hong Yang
- Hubei Hong Shan Laboratory, Huazhong Agricultural University, Shizishan Street, Hongshan District, Wuhan, Hubei 430070, China.
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5
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Su R, Tang H, Xi F. Sensitive electrochemical detection of p-nitrophenol by pre-activated glassy carbon electrode integrated with silica nanochannel array film. Front Chem 2022; 10:954748. [PMID: 35991606 PMCID: PMC9388733 DOI: 10.3389/fchem.2022.954748] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 07/07/2022] [Indexed: 11/13/2022] Open
Abstract
Convenient, rapid and sensitive detection of p-nitrophenol (p-NP), one of the priority environmental pollutants, in environmental samples is of great significance. Electrochemical sensor with simple fabrication process, high sensitivity and selectivity, good antifouling, and regeneration performance is highly desirable. Herein, an electrochemical sensing platform is demonstrated based on the integration of vertically-ordered mesoporous silica-nanochannel film (VMSF) on electrochemical pre-activated glassy carbon electrode (p-GCE), which is able to realize ultrasensitive detection of p-NP in environmental samples. Electrochemical pre-activation of GCE is achieved through a simple and green electrochemical polarization process including anodic oxidation at high voltage and the following cathodic reduction at low voltage. The p-GCE possesses enhanced active area and introduced active sites, and enables stable binding of VMSF. VMSF is easily grown on p-GCE through the electrochemically assisted self-assembly (EASA) method within 10 s. Owing to the hydrogen bonding between silanol groups and p-NP, VMSF nanochannels display strong enrichment effect for the detection of p-NP. The developed VMSF/p-GCE sensor can achieve sensitive detection of p-NP ranging from 10 nM to 1 μM and from 1 to 30 μM with a limit of detection (LOD) of 9.4 nM. Considering the antifouling ability of VMSF, detection of p-NP in pond water is achieved.
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Affiliation(s)
- Ruobing Su
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, China
| | - Hongliang Tang
- Affiliated Fangchenggang Hospital, Guangxi University of Chinese Medicine, Fangchenggang, China
- *Correspondence: Hongliang Tang, ; Fengna Xi,
| | - Fengna Xi
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, China
- *Correspondence: Hongliang Tang, ; Fengna Xi,
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6
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Ma K, Zheng Y, An L, Liu J. Ultrasensitive Immunosensor for Prostate-Specific Antigen Based on Enhanced Electrochemiluminescence by Vertically Ordered Mesoporous Silica-Nanochannel Film. Front Chem 2022; 10:851178. [PMID: 35308795 PMCID: PMC8927089 DOI: 10.3389/fchem.2022.851178] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 02/08/2022] [Indexed: 01/12/2023] Open
Abstract
Ultrasensitive and specific detection of prostate-specific antigen (PSA) in complex biological samples is crucial for early diagnosis and treatment of prostate-related diseases. Immunoassay with a simple sensing interface and ultrahigh sensitivity is highly desirable. Herein, a novel electroluminescence (ECL) immunosensing platform is demonstrated based on the equipment of vertically ordered mesoporous silica-nanochannel films (VMSFs) with PSA antibody, which is able to realize ultrasensitive detection of PSA in human serum. Through the electrochemically assisted self-assembly (EASA) method, the VMSF is easily grown on an indium tin oxide (ITO) electrode in a few seconds. Owing to a large surface area and the negatively charged surface, VMSF nanochannels display strong electrostatic attraction to the positively charged ECL luminophores (tris(2,2-bipyridyl) dichlororuthenium (II), (Ru(bpy)32+), leading to two orders-of-magnitude enhancement of ECL emission compared with that of the bare ITO electrode. The outer surface of the VMSF is functionalized with reactive epoxy groups, which further allows covalent attachment of PSA antibody (Ab) on the entry of nanochannels. As the combination of PSA with Ab decreases the ECL signal by hindering the mass transfer of ECL luminophores and coreactant, the developed immunosensor can achieve ultrasensitive detection of PSA ranging from 1 pg ml−1 to 100 ng ml−1 with a limit of detection (LOD) of 0.1 pg ml−1. Considering the antifouling ability of the VMSF, sensitive detection of PSA in human serum is also realized. The proposed nanochannel-based immunosensor may open up a new way for the facile development of the universal immunosensing platform for rapid and ultrasensitive detection of disease markers.
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Affiliation(s)
- Kai Ma
- Urology and Lithotripsy Center, Peking University People’s Hospital, Beijing, China
- Peking University Applied Lithotripsy Institute, Peking University, Beijing, China
| | - Yanyan Zheng
- Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China
| | - Lizhe An
- Urology and Lithotripsy Center, Peking University People’s Hospital, Beijing, China
- Peking University Applied Lithotripsy Institute, Peking University, Beijing, China
| | - Jiyang Liu
- Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, China
- *Correspondence: Jiyang Liu, ,
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7
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Chang Z, Zhang C, Yao B. Novel dual-sensitization electrochemiluminescence immunosensor using photopermeable Ru(bpy) 3 2+ -doped chitosan/SiO 2 nanoparticles as labels and chitosan-decorated Nafion/MWNTs composites as enhancer. LUMINESCENCE 2021; 37:58-71. [PMID: 34633751 DOI: 10.1002/bio.4146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/27/2021] [Accepted: 10/01/2021] [Indexed: 12/22/2022]
Abstract
A novel dual-sensitization electrochemiluminescence (ECL) immunosensor for the detection of tumour protein prostate specific antigen (PSA) at trace level using Ru(bpy)3 2+ -doped chitosan/SiO2 nanoparticles (Ru(bpy)3 2+ /chitosan/SiO2 NPs) as the first signal enhancers was fabricated. Due to chitosan with excellent pore forming capacity, these nanoparticles possess porous structures and better photopermeability, and therefore have higher luminescence efficiencies compared with Ru(bpy)3 2+ /SiO2 NPs reported in previous publications. Conversely, chitosan with good biocompatibility and high hydrophilicity was electrochemically decorated onto a Nafion/multiwall carbon nanotubes (Nafion/MWNTs) modified electrode surface and used as the second sensitizing matrix to seize large amounts of prostate specific capture antibody (Ab1 ). The chitosan-decorated Nafion/MWNTs composites exhibited a 5.5-times higher ECL intensity than the unadorned Nafion/MWNTs films. Also, without additional reagents, such as (3-aminopropyl)triethoxysilane (APTS), the one-step functionalized Ru(bpy)3 2+ /chitosan/SiO2 NPs provided a large number of active arms to connect with PSA-detected antibodies (Ab2 ) through the amino groups in chitosan. After a sandwich immunoreaction, the PSA antigen and Ru(bpy)3 2+ /chitosan/SiO2 NPs-labelled Ab2 were sequentially captured onto the Ab1 /chitosan/Nafion/MWNTs-modified electrode surface. The ECL signal increases were linearly related to the PSA antigen concentrations and ranged from 0.01 pg·mLl-1 to 10.0 pg·mLl-1 . Under the optimized experimental conditions, the immunosensor displayed excellent sensitivity and selectivity. The detection limit was as low as 3.4 fg·mLl-1 , equivalent to, or better than, those of the reported ECL immunosensors for PSA.
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Affiliation(s)
- Zheng Chang
- Department of Applied Chemistry of College of Science, Xi'an University of Technology, Xi'an, China
| | - Chao Zhang
- Department of Applied Chemistry of College of Science, Xi'an University of Technology, Xi'an, China
| | - Binghua Yao
- Department of Applied Chemistry of College of Science, Xi'an University of Technology, Xi'an, China
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Ultrasensitive prostate specific antigen monitoring based on electrochemiluminescent immunesystem with synergistic signal amplification effect of resonance energy transfer coupling with K2S2O8-H2O2 dual coreactants. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115697] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Wang FT, Wang LN, Xu J, Huang KJ, Wu X. Synthesis and modification of carbon dots for advanced biosensing application. Analyst 2021; 146:4418-4435. [PMID: 34195700 DOI: 10.1039/d1an00466b] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
There has been an explosion of interest in the use of nanomaterials for biosensing applications, and carbonaceous nanomaterials in particular are at the forefront of this explosion. Carbon dots (CDs), a new type of carbon material, have attracted extensive attention due to their fascinating properties, such as small particle size, tunable optical properties, good conductivity, low cytotoxicity, and good biocompatibility. These properties have enabled them to be highly promising candidates for the fabrication of various high-performance biosensors. In this review, we summarize the top-down and bottom-up synthesis routes of CDs, highlight their modification strategies, and discuss their applications in the fields of photoluminescence biosensors, electrochemiluminescence biosensors, chemiluminescence biosensors, electrochemical biosensors and fluorescence biosensors. In addition, the challenges and future prospects of the application of CDs for biosensors are also proposed.
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Affiliation(s)
- Fu-Ting Wang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
| | - Li-Na Wang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
| | - Jing Xu
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
| | - Ke-Jing Huang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
| | - Xu Wu
- College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China
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10
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Wang B, Liu B, Yan Y. Facile Preparation of ZIF-8 MOF Coated Mesoporous Magnetic Nanoarticles to Provide a Magnetic Solid Phase Extraction Platform. JOURNAL OF ANALYTICAL CHEMISTRY 2021. [DOI: 10.1134/s1061934821040110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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11
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Li L, Xing Z, Tang Q, Yang L, Dai L, Wang H, Yan T, Xu W, Ma H, Wei Q. Enzyme-Free Colorimetric Immunoassay for Protein Biomarker Enabled by Loading and Disassembly Behaviors of Polydopamine Nanoparticles. ACS APPLIED BIO MATERIALS 2020; 3:8841-8848. [DOI: 10.1021/acsabm.0c01167] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Li Li
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Zhenyuan Xing
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Qiaorong Tang
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Lei Yang
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Li Dai
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Huan Wang
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Tao Yan
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Weiying Xu
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Hongmin Ma
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Qin Wei
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
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12
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Mei Y, Li L, Chen N, Zhong C, Hu W. A microwell array structured surface plasmon resonance imaging gold chip for high-performance label-free immunoassay. Analyst 2020; 145:6395-6400. [PMID: 32744544 DOI: 10.1039/d0an01169j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Surface plasmon resonance imaging (SPRi) offers a compelling method for high-throughput, real-time, and label-free biomolecular interaction studies and immunoassays, but its performance suffers from limited intrinsic sensitivity and low-contrast SPRi images. Herein we report a high-performance SPRi chip featuring patterned microwell array constructed by photolithography of adhesive polydopamine (PDA) thin film on conventional gold chip. The chip allows for the facile construction of region-defined sensing array on its surface with improved intrinsic SPRi sensitivity due to the intensified surface plasmon wave (SPW) in the microwells. The immunoassay performance of the as-designed SPRi chip is evaluated by using anti-ochratoxin A (anti-OTA) monoclonal antibody as a model target. The results show that this microwell array structured gold chip exhibits ca. 18%-32% higher signal intensity than the conventional gold chip when detecting anti-OTA at different concentrations, and the noise remains at the same level, showing enhanced intrinsic sensitivity. Meanwhile, this microwell-structured chip affords clear and high-contrast SPRi images with well-defined sensing areas, which greatly facilitates the extraction and quantitative analysis of detection signals while efficiently suppressing the disturbance from background areas.
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Affiliation(s)
- Yihong Mei
- Institute for Clean Energy & Advanced Materials, School of Materials & Energy, Southwest University, 2 Rd Tiansheng, Beibei, Chongqing 404100, China.
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13
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A sandwich-type ECL immunosensor based on signal amplification using a ZnO nanorods-L-cysteine-luminol nanocomposite for ultrasensitive detection of prostate specific antigen. Anal Chim Acta 2020; 1109:98-106. [DOI: 10.1016/j.aca.2020.02.056] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 02/24/2020] [Accepted: 02/26/2020] [Indexed: 02/06/2023]
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14
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Electrochemiluminescence behaviour of m-CNNS quenched by CeO2@PDA composites for sensitive detection of BNP. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113970] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Sun C, Shi Y, Tang M, Hu X, Long Y, Zheng H. A signal amplification strategy for prostate specific antigen detection via releasing oxidase-mimics from coordination nanoparticles by alkaline phosphatase. Talanta 2020; 213:120827. [PMID: 32200923 DOI: 10.1016/j.talanta.2020.120827] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/07/2020] [Accepted: 02/11/2020] [Indexed: 12/15/2022]
Abstract
A novel signal amplification method for prostate specific antigen (PSA) is developed by freeing fluorescein with photoinduced oxidase-like activity from coordination nanoparticles (CNPs) in the presence of alkaline phosphatase (ALP). CNPs loaded with fluorescein (F@CNPs) are obtained in aqueous solution by self-assembly using Tb3+ as metal ion, guanosine monophosphate (5'-GMP) as ligand, and fluorescein as signal molecule. The F@CNPs display outstanding properties of simple synthesis, low cost, good water solubility, negligible leakage and satisfactory load capacity. Fluorescein is quantitatively encapsulated in CNPs with a binding ratio of 92.72%. Meanwhile, ALP can specifically hydrolyze the phosphate group of 5'-GMP ligand, triggering the destruction of F@CNPs and leakage of fluorescein. Fluorescein, a photoinduced oxidase mimic, can catalyze the oxidation of non-fluorescent Amplex UltraRed (AUR) into fluorescent resorufin under LED lamp. This strategy exhibits good sensitivity for ALP detection. In addition, a new immunoassay for PSA is validated by labelling ALP on PSA antibody. The low detection limit of 0.04 ng mL-1 in detecting PSA is appropriate for PSA detection in real samples. Therefore, the work not only establishes a new strategy for ALP and PSA determination, but also provides a new conception for putting photoinduced oxidase-like fluorescein in practical application.
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Affiliation(s)
- Chaoqun Sun
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing, 400715, China
| | - Ying Shi
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing, 400715, China
| | - Menghuan Tang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing, 400715, China
| | - Xuemei Hu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing, 400715, China
| | - Yijuan Long
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing, 400715, China
| | - Huzhi Zheng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Beibei, Chongqing, 400715, China.
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16
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Wang L, Xing B, Ren X, Hu X, Wang H, Wu D, Wei Q. Mo2C combined with carbon material nanosphere as an electrochemiluminescence super-enhancer and antibody label for ultrasensitive detection of cardiac troponin I. Biosens Bioelectron 2020; 150:111910. [DOI: 10.1016/j.bios.2019.111910] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/16/2019] [Accepted: 11/19/2019] [Indexed: 11/15/2022]
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17
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Negahdary M, Sattarahmady N, Heli H. Advances in prostate specific antigen biosensors-impact of nanotechnology. Clin Chim Acta 2020; 504:43-55. [PMID: 32004532 DOI: 10.1016/j.cca.2020.01.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/25/2020] [Accepted: 01/27/2020] [Indexed: 01/01/2023]
Abstract
Prostate cancer is one of the most dangerous and deadly cancers in elderly men. Early diagnosis using prostate-specific antigen (PSA) facilitates disease detection, management and treatment. Biosensors have recently been used as sensitive, selective, inexpensive and rapid diagnostic tools for PSA detection. In this review, a variety of PSA biosensors such as aptasensors, peptisensors and immunesensors are highlighted. These use aptamers, peptides and antibodies in the biorecognition element, respectively, and can detect PSA with very high sensitivity via electrochemical, electrochemiluminescence, fluorescence and surface-enhanced Raman spectroscopy. To improve the sensitivity of most of these PSA biosensors, different nanostructured materials have played a critical role.
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Affiliation(s)
- M Negahdary
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - N Sattarahmady
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Medical Physics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - H Heli
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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18
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Wang C, Zhang N, Wei D, Feng R, Fan D, Hu L, Wei Q, Ju H. Double electrochemiluminescence quenching effects of Fe3O4@PDA-CuXO towards self-enhanced Ru(bpy)32+ functionalized MOFs with hollow structure and it application to procalcitonin immunosensing. Biosens Bioelectron 2019; 142:111521. [DOI: 10.1016/j.bios.2019.111521] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/11/2019] [Accepted: 07/15/2019] [Indexed: 01/07/2023]
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19
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A sandwich-type photoelectrochemical immunosensor for NT-pro BNP detection based on F-Bi2WO6/Ag2S and GO/PDA for signal amplification. Biosens Bioelectron 2019; 131:299-306. [DOI: 10.1016/j.bios.2019.02.029] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/27/2019] [Accepted: 02/11/2019] [Indexed: 12/19/2022]
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20
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Tian C, Wang L, Luan F, Zhuang X. An electrochemiluminescence sensor for the detection of prostate protein antigen based on the graphene quantum dots infilled TiO2 nanotube arrays. Talanta 2019; 191:103-108. [DOI: 10.1016/j.talanta.2018.08.050] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 08/12/2018] [Accepted: 08/18/2018] [Indexed: 01/04/2023]
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21
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Ren R, Cai G, Yu Z, Zeng Y, Tang D. Metal-Polydopamine Framework: An Innovative Signal-Generation Tag for Colorimetric Immunoassay. Anal Chem 2018; 90:11099-11105. [DOI: 10.1021/acs.analchem.8b03538] [Citation(s) in RCA: 200] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Rongrong Ren
- Key Laboratory of Analytical Science for Food Safety and Biology (MOE and Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350116, People’s Republic of China
| | - Guoneng Cai
- Key Laboratory of Analytical Science for Food Safety and Biology (MOE and Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350116, People’s Republic of China
| | - Zhenzhong Yu
- Key Laboratory of Analytical Science for Food Safety and Biology (MOE and Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350116, People’s Republic of China
| | - Yongyi Zeng
- Liver Disease Center, The First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, People’s Republic of China
| | - Dianping Tang
- Key Laboratory of Analytical Science for Food Safety and Biology (MOE and Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350116, People’s Republic of China
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22
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Ball V. Polydopamine Nanomaterials: Recent Advances in Synthesis Methods and Applications. Front Bioeng Biotechnol 2018; 6:109. [PMID: 30175095 PMCID: PMC6108306 DOI: 10.3389/fbioe.2018.00109] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Accepted: 07/13/2018] [Indexed: 11/16/2022] Open
Abstract
Polydopamine (PDA), the final oxidation product of dopamine or other catecholamines, attracted much attention as versatile coatings that can be used to cover the surface of almost all materials with a conformal layer of adjustable thickness ranging from a few to about 100 nm. These PDA layers can be subsequently modified with molecules carrying nucleophilic groups or with metallic nanoparticles from solutions containing metallic cations. However, during the deposition of PDA film on the surfaces, the reaction products that are simultaneously obtained from the oxidation of catecholamines in solution precipitate. Hence, some recent effort has been devoted to produce PDA in the form of nanoparticles. The aim of this short review is to give a comprehensive description of the synthesis methods yielding of PDA nanoparticles in the absence or in the presence of templating agents (polymers, polyelectrolytes, surfactants, proteins, and even some small organic molecules). We will also describe the use of thin PDA layers to coat already synthesized nanoparticles or nanotubes. Finally, several first applications of the obtained PDA nanoparticles will be described.
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Affiliation(s)
- Vincent Ball
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg, France
- Unité Mixte de Recherche, Institut National de la Santé et de la Recherche Médicale, Strasbourg, France
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23
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Xiang H, Wang Y, Wang M, Shao Y, Jiao Y, Zhu Y. A redox cycling-amplified electrochemical immunosensor for α-fetoprotein sensitive detection via polydopamine nanolabels. NANOSCALE 2018; 10:13572-13580. [PMID: 29974910 DOI: 10.1039/c8nr02946f] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A sandwich-type electrochemical immunosensor for sensitive detection of a tumor marker, α-fetoprotein (AFP), was fabricated by employing polydopamine-detection antibody nanoparticles (PDANPs-Ab2) as selective redox cycling-based signal amplifiers on an electrodeposited nano-gold electrode. In this research, PDANPs prepared through oxidative polymerization of dopamine were found to amplify the oxidation charge transfer of the electrochemical mediator (1,1'-ferrocene dimethanol, FDM), which was supported by cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) investigation. Therefore, PDANPs were utilized as label materials of electrochemical immunosensors to enhance sensitivity for the first time. Meanwhile, the nano-gold electrode was used as a platform to accelerate electron transfer and immobilize capture antibody (Ab1). The electrochemical performance of the AFP immunosensor was investigated in PBS containing FDM with CV. Under optimal conditions, the constructed AFP immunosensor exhibited a wide linear range from 1 pg mL-1 to 50 ng mL-1 and a low detection limit of 0.3 pg mL-1, as well as excellent stability, reproducibility and selectivity. Measurements of AFP in human serum gave excellent correlation with the clinical standard Chemiluminescence Microparticle Immuno Assay (CMIA). These results indicated that the developed immunosensor may have promising application in the clinical diagnosis of AFP and other tumor markers.
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Affiliation(s)
- Haipeng Xiang
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
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24
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Xu LL, Zhang W, Shang L, Ma RN, Jia LP, Jia WL, Wang HS, Niu L. Perylenetetracarboxylic acid and carbon quantum dots assembled synergistic electrochemiluminescence nanomaterial for ultra-sensitive carcinoembryonic antigen detection. Biosens Bioelectron 2018; 103:6-11. [DOI: 10.1016/j.bios.2017.10.035] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 01/09/2023]
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25
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Liu Y, Zhao Y, Fan Q, Khan MS, Li X, Zhang Y, Ma H, Wei Q. Aptamer based electrochemiluminescent thrombin assay using carbon dots anchored onto silver-decorated polydopamine nanospheres. Mikrochim Acta 2018; 185:85. [DOI: 10.1007/s00604-017-2616-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 12/11/2017] [Indexed: 12/11/2022]
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26
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Shi L, Li X, Zhu W, Wang Y, Du B, Cao W, Wei Q, Pang X. Sandwich-Type Electrochemiluminescence Sensor for Detection of NT-proBNP by Using High Efficiency Quench Strategy of Fe 3O 4@PDA toward Ru(bpy) 32+ Coordinated with Silver Oxalate. ACS Sens 2017; 2:1774-1778. [PMID: 29227092 DOI: 10.1021/acssensors.7b00809] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Heart failure (HF) is a burgeoning public health problem trigged by a heart circulation disorder. N-terminal pro-B-type natriuretic peptide (NT-proBNP) has been acknowledged as a prognostic biomarker for cardiac disease. Herein, a sandwich-type electrochemiluminescence (ECL) immunosensor was introduced for sensitive detection of NT-proBNP. Gold nanoparticle modified graphene oxide-Ru(bpy)32+/Ag2C2O4 was used as a luminophore and a desirable platform for immobilization of the captured antibodies. The more stable immobilization of plentiful Ru(bpy)32+ could be implemented by direct covalent bonding chelation with Ag2C2O4. More importantly, significant quenching can be achieved by introducing polydopamine (PDA) coated Fe3O4 onto the electrode via sandwich immunoreactions. The quenching mechanism mainly showed that the excited states of Ru(bpy)32+ could be annihilated by quinone units in PDA via energy transfer. The ECL quenching efficiency was logarithmically related to the concentration of the NT-proBNP in the range from 0.0005 ng/mL to 100.0 ng/mL with a detection limit of 0.28 pg/mL. Furthermore, this specific immunosensor presented good stability and repeatability as well as selectivity, which offers a guiding significance in both fundamental and clinical diagnosis of NT-proBNP.
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Affiliation(s)
- Li Shi
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
| | - Xiaojian Li
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
| | - Wenjuan Zhu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
| | - Yaoguang Wang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
| | - Bin Du
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
| | - Wei Cao
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
| | - Xuehui Pang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering and ‡School of Resources and Environment, University of Jinan, Jinan 250022, Shandong, China
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27
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Liu X, Jiang H. Construction and Potential Applications of Biosensors for Proteins in Clinical Laboratory Diagnosis. SENSORS (BASEL, SWITZERLAND) 2017; 17:E2805. [PMID: 29207528 PMCID: PMC5750678 DOI: 10.3390/s17122805] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 11/20/2017] [Accepted: 11/30/2017] [Indexed: 12/11/2022]
Abstract
Biosensors for proteins have shown attractive advantages compared to traditional techniques in clinical laboratory diagnosis. In virtue of modern fabrication modes and detection techniques, various immunosensing platforms have been reported on basis of the specific recognition between antigen-antibody pairs. In addition to profit from the development of nanotechnology and molecular biology, diverse fabrication and signal amplification strategies have been designed for detection of protein antigens, which has led to great achievements in fast quantitative and simultaneous testing with extremely high sensitivity and specificity. Besides antigens, determination of antibodies also possesses great significance for clinical laboratory diagnosis. In this review, we will categorize recent immunosensors for proteins by different detection techniques. The basic conception of detection techniques, sensing mechanisms, and the relevant signal amplification strategies are introduced. Since antibodies and antigens have an equal position to each other in immunosensing, all biosensing strategies for antigens can be extended to antibodies under appropriate optimizations. Biosensors for antibodies are summarized, focusing on potential applications in clinical laboratory diagnosis, such as a series of biomarkers for infectious diseases and autoimmune diseases, and an evaluation of vaccine immunity. The excellent performances of these biosensors provide a prospective space for future antibody-detection-based disease serodiagnosis.
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Affiliation(s)
- Xuan Liu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Southeast University, Nanjing 210003, China.
| | - Hui Jiang
- School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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28
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Song J, Wu S, Yang X, Yuan J. A carboxylated graphene nanodisks/glucose oxidase nanotags and Mn:CdS/TiO2 matrix based dual signal amplification strategy for ultrasensitive photoelectrochemical detection of tumor markers. Analyst 2017; 142:4647-4654. [DOI: 10.1039/c7an01453h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A graphene nanodisk and glucose oxidase based dual signal amplification strategy was developed for a highly sensitive PEC immunoassay of CEA.
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Affiliation(s)
- Jie Song
- School of Chemistry
- Dalian University of Technology
- Dalian 116023
- PR China
| | - Shuo Wu
- School of Chemistry
- Dalian University of Technology
- Dalian 116023
- PR China
| | - Xinlan Yang
- School of Chemistry
- Dalian University of Technology
- Dalian 116023
- PR China
| | - Jingli Yuan
- School of Chemistry
- Dalian University of Technology
- Dalian 116023
- PR China
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