1
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Ge R, Zhang SM, Dai HJ, Wei J, Jiao TH, Chen QM, Chen QS, Chen XM. G-Quadruplex/Hemin-Mediated Polarity-Switchable and Photocurrent-Amplified System for Escherichia coli O157:H7 Detection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:16807-16814. [PMID: 37879039 DOI: 10.1021/acs.jafc.3c06052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
The contamination of food by pathogens is a serious problem in global food safety, and current methods of detection are costly, time-consuming, and cumbersome. Therefore, it is necessary to develop rapid, portable, and sensitive assays for foodborne pathogens. In addition, assays for foodborne pathogens must be resistant to interference resulting from the complex food matrix to prevent false positives and negatives. In this study, hemin and reduced graphene oxide-MoS2 sheets (GMS) were used to design a near-infrared (NIR)-responsive photoelectrochemical (PEC) aptasensor with target-induced photocurrent polarity switching based on a hairpin aptamer (Hp) with a G-quadruplex motif. A ready-to-use analytical device was developed by immobilizing GMS on the surface of a commercial screen-printed electrode, followed by the attachment of the aptamer. In the presence of Escherichia coli O157:H7, the binding sites of Hp with the G-quadruplex motif were opened and exposed to hemin, leading to the formation of a G-quadruplex/hemin DNAzyme. Crucially, after binding to hemin, the charge transfer pathway of GMS changes, resulting in a switch of the photocurrent polarity. Further, G-quadruplex/hemin DNAzyme enhanced the cathodic photocurrent, and the proposed sensor exhibited a wide linear range ((25.0-1.0) × 107 CFU/mL), a low limit of detection (2.0 CFU/mL), and good anti-interference performance. These findings expand the applications of NIR-responsive PEC materials and provide versatile PEC methods for detecting biological analytes, especially for food safety testing.
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Affiliation(s)
- Rui Ge
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Shu-Min Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Han-Jie Dai
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Jie Wei
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Tian-Hui Jiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Qing-Min Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Quan-Sheng Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Xiao-Mei Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
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2
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Sun H, Zhou P, Su B. Electrochemiluminescence of Semiconductor Quantum Dots and Its Biosensing Applications: A Comprehensive Review. BIOSENSORS 2023; 13:708. [PMID: 37504107 PMCID: PMC10377090 DOI: 10.3390/bios13070708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/26/2023] [Accepted: 07/03/2023] [Indexed: 07/29/2023]
Abstract
Electrochemiluminescence (ECL) is the chemiluminescence triggered by electrochemical reactions. Due to the unique excitation mode and inherent low background, ECL has been a powerful analytical technique to be widely used in biosensing and imaging. As an emerging ECL luminophore, semiconductor quantum dots (QDs) have apparent advantages over traditional molecular luminophores in terms of luminescence efficiency and signal modulation ability. Therefore, the development of an efficient ECL system with QDs as luminophores is of great significance to improve the sensitivity and detection flux of ECL biosensors. In this review, we give a comprehensive summary of recent advances in ECL using semiconductor QDs as luminophores. The luminescence process and ECL mechanism of semiconductor QDs with various coreactants are discussed first. Specifically, the influence of surface defects on ECL performance of semiconductor QDs is emphasized and several typical ECL enhancement strategies are summarized. Then, the applications of semiconductor QDs in ECL biosensing are overviewed, including immunoassay, nucleic acid analysis and the detection of small molecules. Finally, the challenges and prospects of semiconductor QDs as ECL luminophores in biosensing are featured.
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Affiliation(s)
- Hui Sun
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Ping Zhou
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Bin Su
- Key Laboratory of Excited-State Materials of Zhejiang Province, Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
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3
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Feng Y, Wang N, Ju H. Electrochemiluminescence biosensing and bioimaging with nanomaterials as emitters. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1329-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Xu Y, Gao X, Wang D, Jia J, Zhang B, Zou G. Surface Defect-Involved and Single-Color Electrochemiluminescence of Gold Nanoclusters for Immunoassay. Anal Chem 2022; 94:12070-12077. [PMID: 35994734 DOI: 10.1021/acs.analchem.2c01771] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Single-color electrochemiluminescence (ECL) of nanoparticles is normally achieved in a bandgap engineered route via passivating the nanoparticle surface. Herein, when linear mercaptoalkanoic acids are employed as the thiol-capping agent of unary Au nanoclusters (NCs), a single-stabilizer-capped strategy is proposed to achieve surface defect-involved and single-color ECL from the AuNCs with hydrazine (N2H4) as the coreactant. The carbon skeleton of the linear mercaptoalkanoic acids exhibits important effects on the ECL of the AuNCs, and efficient oxidative-reductive ECL is achieved with 8-mercaptooctanoic acid (MOA), 11-mercaptoundecanoic acid (MUA), and 12-mercaptododecanoic acid (MDA) capped AuNCs, respectively. The ECL of these AuNCs not only exhibits similar ECL intensity-potential profiles with the same maximum emission potential of ∼1.20 V (vs Ag/AgCl), but also demonstrates almost identical spectral ECL profiles of the same maximum emission wavelength around 713 nm as well as the same fwhm of 64 nm. The ECL of AuNCs/N2H4 is obviously red-shifted to the photoluminescence of AuNCs, which not only provides unambiguous evidence that bandgap-engineered ECL of these AuNCs is quenched but also manifests that the capping agent of linear mercaptoalkanoic acid is promising for the achievement of surface defect-involved and single-color ECL from AuNCs. The MUA capped AuNCs can be utilized as an ECL tag for a sensitive and selective immunoassay, which exhibits a broad linear range from 0.5 mU/mL to 1 U/mL with a low limit of detection of 0.1 mU/mL (S/N = 3) with CA125 as the model analyte. This work provides a promising alternative to the traditional surface-passivating strategy for the achievement of single-color ECL from nanoparticle luminophores.
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Affiliation(s)
- Yuqi Xu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Xuwen Gao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Dongyang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Jingna Jia
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Bin Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Guizheng Zou
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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Zhu LB, Wang HY, Zhang TY, Chen FZ, Han DM, Zhao WW. Rational Utilization of Photoelectrochemistry of Photosystem II for Self-Powered Photocathodic Detection of MicroRNA in Cells. Anal Chem 2021; 93:15761-15767. [PMID: 34779611 DOI: 10.1021/acs.analchem.1c03900] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The photoanode, photosystem II (PSII)/hierarchical inverse opal (IO) TiO2, is coupled to the complementary photocathode, PbS quantum dots (QDs)/DNA probes, which is then integrated into a two-compartment photoelectrochemical (PEC) cell to achieve a self-powered system to enable photocathodic detection of microRNA-10b from HeLa cells. In such a system, all of the PSII catalytic products, i.e., electrons, protons, and O2, were rationally utilized and could overcome the general issue of varied O2 levels in photocathodic detection. The correlation between the target-triggered formation of the DNA complexes and the catalytic reduction of the dissolved O2 makes possible the steady microRNA-10b detection with good sensitivity and selectivity. This work has unveiled the ability of PSII to construct self-powered detecting devices and shed light on its application in new arenas.
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Affiliation(s)
- Li-Bang Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hai-Yan Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Tian-Yang Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Feng-Zao Chen
- Engineering Research Center of Recycling & Comprehensive Utilization of Pharmaceutical and Chemical Waste of Zhejiang Province, Taizhou University, Jiaojiang 318000, China
| | - De-Man Han
- Engineering Research Center of Recycling & Comprehensive Utilization of Pharmaceutical and Chemical Waste of Zhejiang Province, Taizhou University, Jiaojiang 318000, China
| | - Wei-Wei Zhao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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6
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Huang C, Liu Y, Sun Y, Wang F, Ge S, Yu J. Cathode-Anode Spatial Division Photoelectrochemical Platform Based on a One-Step DNA Walker for Monitoring of miRNA-21. ACS APPLIED MATERIALS & INTERFACES 2021; 13:35389-35396. [PMID: 34291635 DOI: 10.1021/acsami.1c08416] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photoelectrochemical (PEC) biosensors carried out the whole reaction process in the same solution, which would limit the sensitivity and selectivity of detection in the sensing system. Herein, we reported a promising new cathode-anode spatial division PEC platform based on the two-electrode synergistic enhancement strategy. With the photoanode and photocathode integrated in the same current circuit, the platform exhibited an increased photocurrent response, as well as an improved anti-interference ability led by separating the two electrodes spatially. In this proposal, red light-driven AgInS2 nanoparticles (NPs) served as the photoanode to build biometric steps and amplify the signal, whereas p-type PbS quantum dots were selected as the photocathode to increase the signal. With the participation of alkaline phosphatase (ALP) labeled on Au NPs-DNA, ascorbic acid 2-phosphate was catalyzed to produce ascorbic acid as an electron donor, resulting in the enhancement of the PEC signal. Interestingly, in the presence of miRNA-21 and T7 Exo, the one-step DNA walker amplification can be triggered to reduce the PEC signal by releasing ALP-Au NP-DNA. The constructed PEC biosensor exhibited a detection limit of as low as 3.4 fM for miRNA-21, which was expected to be applied to early clinical diagnosis. Also, we believe that the proposed cathode-anode spatial division PEC platform can open up a new view for the establishment of other types of PEC biosensors.
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Affiliation(s)
- Chuan Huang
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, P.R. China
| | - Yunqing Liu
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, P.R. China
| | - Yina Sun
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, P.R. China
| | - Fengyi Wang
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, P.R. China
| | - Shenguang Ge
- Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, P.R. China
| | - Jinghua Yu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P.R. China
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7
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DNA-targeted formation and catalytic reactions of DNAzymes for label-free ratiometric electrochemiluminescence biosensing. Talanta 2021; 225:121964. [PMID: 33592718 DOI: 10.1016/j.talanta.2020.121964] [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: 11/01/2020] [Revised: 11/26/2020] [Accepted: 11/30/2020] [Indexed: 01/18/2023]
Abstract
A label-free ratiometric electrochemiluminescence (ECL) sensing strategy for the sensitive detection of target DNA (T-DNA) was proposed on the basis of G-quadruplex/hemin-regulated ECL emissions of CdS quantum dots (QDs) and luminol with their common coreactant of H2O2. The ECL biosensor was constructed through stepwise assemblies of CdS QDs and hairpin DNA (H-DNA) on a glassy carbon electrode, and subsequent introduction of T-DNA resulted in the development of G-quadruplex/hemin DNAzymes via the specific recognition of T-DNA and H-DNA in the presence of hemin and K+ ions. The formed DNAzymes not only prompted the catalytic oxidation of hydroquinone followed by deposition of insoluble oxidation oligomers on the electrode surface to attenuate the cathodic ECL emission of CdS QDs but also triggered the catalytic oxidation of luminol to enhance the anodic ECL emission. The label-free ratiometric ECL biosensor for the detection of T-DNA showed a wide response range from 1 to 10,000 fM (10-15 M) with a low detection limit of 0.2 fM and exhibited excellent selectivity against mismatched base sequences. This work provides a reliable and sensitive sensing platform for the detection of targets in analytical community by means of rational design of DNA sequences.
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8
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Dai Z, Su Y, Gao Z, Song YY. “Black body” effect of carbon nanospheres: A broadband energy acceptor in constructing electrochemiluminescence resonance energy transfer for biosensing. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Zhang C, Zhang H, Wu P, Zhang X, Liu J. Suppressing the background activity of hemin for boosting the sensitivity of DNAzyme-based biosensors by SYBR Green I. Biosens Bioelectron 2020; 169:112603. [PMID: 32947082 DOI: 10.1016/j.bios.2020.112603] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/04/2020] [Accepted: 09/06/2020] [Indexed: 02/08/2023]
Abstract
Peroxidase-like DNAzymes have been extensively used to replace horseradish peroxidase (HRP) for developing biosensors for signal amplification. However, the background activity from the cofactor (i.e., free hemin) has limited the sensitivity of such sensors. Herein, we aim to find an inhibitor for hemin to suppress the background signal, and a classic split DNAzyme-based sensor was used to detect a complementary DNA oligonucleotide. After screening a series of dyes, SYBR Green I (SG, one of the DNA stanning dyes) was selected for suppressing the background. Simply by adding 0.84 μM SG, the background from 50 nM hemin was suppressed over 30-fold. The suppression was caused by the interaction between SG and hemin. In the presence of the target DNA, the formed duplex region and G-quadruplex structure can better bind SG and hemin respectively, thus preventing the interaction between them and showing a high activity of the DNAzyme. The optimized sensor showed a detection limit of 3.8 pM for the target DNA (p53 gene). In addition, the backgrounds from chemiluminescence, colorimetric and fluorescence sensing modes can all be reduced by adding SG to the split DNAzyme system. The suppression of the background of peroxidase DNAzymes is a critical step towards practical use of related biosensors.
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Affiliation(s)
- Chi Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Houchun Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Peng Wu
- Key Laboratory of Green Chemistry and Technology, Analytical & Testing Center, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
| | - Xinfeng Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China; Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Ontario N2L 3G1, Canada.
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Ontario N2L 3G1, Canada.
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10
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Electrochemical luminescence sensor based on CDs@HKUST-1 composite for detection of catechol. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114215] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Meng Y, Bai W, Zhang Y, Sun H, Li Y. Electrogenerated chemiluminescence biosensing method based on 5-hydroxymethylcytosine antibody and PDDA-CNTs nanocomposites for the determination of 5-hydroxymethylcytosine double-stranded DNA. Talanta 2020; 210:120597. [DOI: 10.1016/j.talanta.2019.120597] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 11/20/2019] [Accepted: 11/25/2019] [Indexed: 01/12/2023]
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12
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Chowdhury AD, Takemura K, Khorish IM, Nasrin F, Ngwe Tun MM, Morita K, Park EY. The detection and identification of dengue virus serotypes with quantum dot and AuNP regulated localized surface plasmon resonance. NANOSCALE ADVANCES 2020; 2:699-709. [PMID: 36133234 PMCID: PMC9417854 DOI: 10.1039/c9na00763f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 12/12/2019] [Indexed: 05/15/2023]
Abstract
The dengue hemorrhagic fever or dengue shock syndrome has become a severe human fatal disease caused by infection with one of the four closely related but serologically distinct dengue viruses (DENVs). All four dengue serotypes are currently co-circulating throughout the subtropics and tropics. Since the fatality rate increases severely when a secondary infection occurs by a virus serotype different from that of the initial infection, serotype identification is equally important as virus detection. In this study, the development and validation of a rapid and quantitative DENV serotype-specific (serotypes 1-4) biosensor are reported by optimizing the stable system between cadmium selenide tellurium sulphide fluorescent quantum dots (CdSeTeS QDs) and gold nanoparticles (AuNPs). Four different nanoprobes are designed using each primer-probe serotype-specific hairpin single-stranded DNA covalently bound at different positions to CdSeTeS QDs, which generates an altered fluorescence signal for each serotype of DENV. In fourplex reactions with free functionalized AuNPs and the four nanoprobes, the standard dilutions of the target virus DNA from 10-15 to 10-10 M were successfully detected. The limit of detection was found to be in the femtomolar range for all four serotypes, where the serotype detection ability was undoubtedly established. To confirm the applicability of this sensing performance in long chained complex RNAs, the sensor was also applied successfully to RNAs extracted from DENV culture fluids for serotype identification as well as quantification, which can lead to a potential diagnostic probe for point-of-care detection.
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Affiliation(s)
- Ankan Dutta Chowdhury
- Research Institute of Green Science and Technology, Shizuoka University 836 Ohya Suruga-ku Shizuoka 422-8529 Japan
| | - Kenshin Takemura
- Department of Bioscience, Graduate School of Science and Technology, Shizuoka University 836 Ohya Suruga-ku Shizuoka 422-8529 Japan
| | - Indra Memdi Khorish
- College of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University 836 Ohya Suruga-ku Shizuoka 422-8529 Japan
| | - Fahmida Nasrin
- Department of Bioscience, Graduate School of Science and Technology, Shizuoka University 836 Ohya Suruga-ku Shizuoka 422-8529 Japan
| | - Mya Myat Ngwe Tun
- Department of Virology, Institute of Tropical Medicine, Nagasaki University Sakamoto 1-12-4 Nagasaki City 852-8523 Japan
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine, Nagasaki University Sakamoto 1-12-4 Nagasaki City 852-8523 Japan
| | - Enoch Y Park
- Research Institute of Green Science and Technology, Shizuoka University 836 Ohya Suruga-ku Shizuoka 422-8529 Japan
- Department of Bioscience, Graduate School of Science and Technology, Shizuoka University 836 Ohya Suruga-ku Shizuoka 422-8529 Japan
- College of Agriculture, Graduate School of Integrated Science and Technology, Shizuoka University 836 Ohya Suruga-ku Shizuoka 422-8529 Japan
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An ultrasensitive sensing platform for microRNA-155 based on H2O2 quenched hydroxide-dependent ECL emission of PFO Pdots. Biosens Bioelectron 2020; 150:111872. [DOI: 10.1016/j.bios.2019.111872] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/06/2019] [Accepted: 11/09/2019] [Indexed: 02/07/2023]
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14
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Kosman J, Juskowiak B. Bioanalytical Application of Peroxidase-Mimicking DNAzymes: Status and Challenges. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2019; 170:59-84. [PMID: 28474157 DOI: 10.1007/10_2017_7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
DNAzymes with peroxidase-mimicking activity are a new class of catalytically active DNA molecules. This system is formed as a complex of hemin and a G-quadruplex structure created by oligonucleotides rich in guanine. Considering catalytic activity, this DNAzyme mimics horseradish peroxidase, the enzyme most commonly used for signal generation in bioassays. Because DNAzymes exhibit many advantages over protein enzymes (thermal stability, easy and cheap synthesis and purification) they can successfully replace HRP in bioanalytical applications. HRP-like DNAzymes have been applied in the detection of several DNA sequences. Many amplification techniques have been conjugated with DNAzyme systems, resulting in ultrasensitive bioassays. On the other hand, the combination of aptamers and DNAzymes has led to the development of aptazymes for specific targets. An up-to-date summary of the most interesting DNAzyme-based assays is presented here. The elaborated systems can be used in medical diagnosis or chemical and biological studies.
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Affiliation(s)
- J Kosman
- Laboratory of Bioanalytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland.
| | - B Juskowiak
- Laboratory of Bioanalytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland
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15
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Shi Z, Li G, Hu Y. Progress on the application of electrochemiluminescence biosensor based on nanomaterials. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.04.066] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Xu ZH, Wang H, Wang J, Zhao W, Xu JJ, Chen HY. Bidirectional Electrochemiluminescent Sensing: An Application in Detecting miRNA-141. Anal Chem 2019; 91:12000-12005. [DOI: 10.1021/acs.analchem.9b02914] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Zhi-Hong Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hui Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jing Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Wei Zhao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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17
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Yang L, Zhang B, Fu L, Fu K, Zou G. Efficient and Monochromatic Electrochemiluminescence of Aqueous‐Soluble Au Nanoclusters via Host–Guest Recognition. Angew Chem Int Ed Engl 2019; 58:6901-6905. [DOI: 10.1002/anie.201900115] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Liqiong Yang
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Bin Zhang
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Li Fu
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Kena Fu
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Guizheng Zou
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
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18
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Yang L, Zhang B, Fu L, Fu K, Zou G. Efficient and Monochromatic Electrochemiluminescence of Aqueous‐Soluble Au Nanoclusters via Host–Guest Recognition. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900115] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Liqiong Yang
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Bin Zhang
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Li Fu
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Kena Fu
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
| | - Guizheng Zou
- School of Chemistry and Chemical EngineeringShandong University Jinan 250100 China
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19
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Yang R, Zou K, Zhang X, Du C, Chen J. A new photoelectrochemical immunosensor for ultrasensitive assay of prion protein based on hemin-induced photocurrent direction switching. Biosens Bioelectron 2019; 132:55-61. [PMID: 30852382 DOI: 10.1016/j.bios.2019.02.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 02/11/2019] [Accepted: 02/17/2019] [Indexed: 12/18/2022]
Abstract
As a significant biomarker of prion diseases, ultrasensitive assay of infectious isoform of prion (PrPSc) is highly desirable for early diagnostics of prion diseases. Herein, taking normal cellular form of prion (PrPC) as a model owing to a high risk of pathogenicity of PrPSc, a new photoelectrochemical immunosensor has been developed based on hemin-induced switching of photocurrent direction. In the presence of PrPC, nitrogen-doped porous carbon-hemin polyhedra labeled with secondary antibody were introduced onto the CdS-chitosan (CS) nanoparticles-modified indium-tin oxide (ITO) electrode via the antigen-antibody specific recognition. Because of the matched energy level between CdS and hemin, the high-efficiency switch of photocurrent direction of the ITO/CdS-CS photoelectrode from anodic to cathodic photocurrent was observed even at very low concentration (0.4 aM) of PrPC. Through changing the specific antibody, this method can be easily expanded to PrPSc assay. Such low detectable limit is very useful in the early diagnosis and screening of prion diseases. The developed method has also promising applications in bioanalysis, disease diagnostics, and clinical biomedicine.
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Affiliation(s)
- Ruiying Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Kang Zou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Xiaohua Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Cuicui Du
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Jinhua Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
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20
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“Gold rush” in modern science: Fabrication strategies and typical advanced applications of gold nanoparticles in sensing. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.01.006] [Citation(s) in RCA: 207] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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21
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Lv Y, Chen S, Shen Y, Ji J, Zhou Q, Liu S, Zhang Y. Competitive Multiple-Mechanism-Driven Electrochemiluminescent Detection of 8-Hydroxy-2′-deoxyguanosine. J Am Chem Soc 2018; 140:2801-2804. [DOI: 10.1021/jacs.8b00515] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yanqin Lv
- Jiangsu Engineering Laboratory
of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech
Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical
Engineering, Medical School, Southeast University, Nanjing 211189, China
| | - Shiyu Chen
- Jiangsu Engineering Laboratory
of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech
Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical
Engineering, Medical School, Southeast University, Nanjing 211189, China
| | - Yanfei Shen
- Jiangsu Engineering Laboratory
of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech
Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical
Engineering, Medical School, Southeast University, Nanjing 211189, China
| | - Jingjing Ji
- Jiangsu Engineering Laboratory
of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech
Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical
Engineering, Medical School, Southeast University, Nanjing 211189, China
| | - Qing Zhou
- Jiangsu Engineering Laboratory
of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech
Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical
Engineering, Medical School, Southeast University, Nanjing 211189, China
| | - Songqin Liu
- Jiangsu Engineering Laboratory
of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech
Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical
Engineering, Medical School, Southeast University, Nanjing 211189, China
| | - Yuanjian Zhang
- Jiangsu Engineering Laboratory
of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech
Key Laboratory for Bio-Medical Research, School of Chemistry and Chemical
Engineering, Medical School, Southeast University, Nanjing 211189, China
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22
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Rossetti M, Porchetta A. Allosterically regulated DNA-based switches: From design to bioanalytical applications. Anal Chim Acta 2018; 1012:30-41. [PMID: 29475471 DOI: 10.1016/j.aca.2017.12.046] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 12/10/2017] [Accepted: 12/28/2017] [Indexed: 02/07/2023]
Abstract
DNA-based switches are structure-switching biomolecules widely employed in different bioanalytical applications. Of particular interest are DNA-based switches whose activity is regulated through the use of allostery. Allostery is a naturally occurring mechanism in which ligand binding induces the modulation and fine control of a connected biomolecule function as a consequence of changes in concentration of the effector. Through this general mechanism, many different allosteric DNA-based switches able to respond in a highly controlled way at the presence of a specific molecular effector have been engineered. Here, we discuss how to design allosterically regulated DNA-based switches and their applications in the field of molecular sensing, diagnostic and drug release.
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Affiliation(s)
- Marianna Rossetti
- Chemistry Department, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Alessandro Porchetta
- Chemistry Department, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy.
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23
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Gao H, Wang X, Li M, Qi H, Gao Q, Zhang C. Proximity hybridization-regulated electrogenerated chemiluminescence bioassay of α-fetoprotein via target-induced quenching mechanism. Biosens Bioelectron 2017. [DOI: 10.1016/j.bios.2017.06.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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24
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A label-free genetic biosensor for diabetes based on AuNPs decorated ITO with electrochemiluminescent signaling. Anal Chim Acta 2017; 982:62-71. [DOI: 10.1016/j.aca.2017.05.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 05/17/2017] [Accepted: 05/19/2017] [Indexed: 01/19/2023]
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25
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Zhao J, Lei YM, Chai YQ, Yuan R, Zhuo Y. Novel electrochemiluminescence of perylene derivative and its application to mercury ion detection based on a dual amplification strategy. Biosens Bioelectron 2016; 86:720-727. [DOI: 10.1016/j.bios.2016.07.036] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 07/05/2016] [Accepted: 07/11/2016] [Indexed: 12/30/2022]
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26
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Wang X, Liu L, Wang Z, Dai Z. Highly sensitive electrochemiluminescent DNA biosensor based on hydrazide-modified graphene quantum dots and hemin/G-quadruplex DNAzyme. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.10.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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27
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A Biofunctional Molecular Beacon for Detecting Single Base Mutations in Cancer Cells. MOLECULAR THERAPY. NUCLEIC ACIDS 2016; 5:e302. [PMID: 27045206 PMCID: PMC5014519 DOI: 10.1038/mtna.2016.18] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 02/09/2016] [Indexed: 12/22/2022]
Abstract
The development of a convenient and sensitive biosensing system to detect
specific DNA sequences is an important issue in the field of genetic disease
therapy. As a classic DNA detection technique, molecular beacon (MB) is often
used in the biosensing system. However, it has intrinsic drawbacks, including
high assay cost, complicated chemical modification, and operational complexity.
In this study, we developed a simple and cost-effective label-free
multifunctional MB (LMMB) by integrating elements of polymerization primer,
template, target recognition, and G-quadruplex into one entity to detect target
DNA. The core technique was accomplished by introducing a G-hairpin that
features fragments of both G-quadruplex and target DNA recognition in the
G-hairpin stem. Hybridization between LMMB and target DNA triggered
conformational change between the G-hairpin and the common C-hairpin, resulting
in significant SYBR-green signal amplification. The hybridization continues to
the isothermal circular strand-displacement polymerization and accumulation of
the double-stranded fragments, causing the uninterrupted extension of the LMMB
without a need of chemical modification and other assistant DNA sequences. The
novel and programmable LMMB could detect target DNA with sensitivity at 250
pmol/l with a linear range from 2 to 100 nmol/l and the relative standard
deviation of 7.98%. The LMMB could sense a single base mutation from the normal
DNA, and polymerase chain reaction (PCR) amplicons of the mutant-type cell line
from the wild-type one. The total time required for preparation and assaying was
only 25 minutes. Apparently, the LMMB shows great potential for detecting DNA
and its mutations in biosamples, and therefore it opens up a new prospect for
genetic disease therapy.
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28
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Dong YP, Chen G, Zhou Y, Zhu JJ. Electrochemiluminescent Sensing for Caspase-3 Activity Based on Ru(bpy)3(2+)-Doped Silica Nanoprobe. Anal Chem 2016; 88:1922-9. [PMID: 26730888 DOI: 10.1021/acs.analchem.5b04379] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Caspase-3 is one of the most frequently activated cysteine proteases during the apoptosis process and has been identified as a well-established cellular marker of apoptosis. In this study, a novel approach for the sensitive determination of caspase-3 activity was proposed using electrochemiluminescence (ECL) of Ru(bpy)3(2+)-doped silica (Ru@SiO2) with tripropylamine (TPA) as coreactant. A nanocomposite containing gold nanoparticles (AuNPs), poly(dimethyldiallyl ammonium chloride) (PDDA), and multiwalled carbon nanotubes (CNTs) was fabricated as an ECL platform. The biotinylated DEVD-peptide (biotin-Gly-Asp-Gly-Asp-Glu-Val-Asp-Gly-Cys) was immobilized on the nanocomposite surface via the strong bonding interaction between AuNPs and the thiol group. Then the streptavidin-modified Ru(bpy)3(2+)-doped silica (Ru@SiO2-SA) was immobilized on the ECL platform via the specific interaction between biotin and streptavidin to generate ECL signal. Caspase-3 can specifically recognize and cleave the N-terminus of DEVD, leading to the loss of the biotin label and the decrease of ECL intensity to determine the activity of caspase-3. The results revealed a new ECL avenue for the sensitive and specific monitor of caspase-3, and the platform could be utilized to evaluate anticancer drugs.
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Affiliation(s)
- Yong-Ping Dong
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China.,School of Chemistry and Chemical Engineering, Anhui University of Technology , Maanshan 243002, China
| | - Gang Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Ying Zhou
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China.,School of Chemistry and Chemical Engineering, Anhui University of Technology , Maanshan 243002, China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
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29
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Yang C, Dou B, Yang J, Yuan R, Xiang Y. Cross-triggered and cascaded recycling amplification for ultrasensitive electrochemical sensing of the mutant human p53 gene. Chem Commun (Camb) 2016; 52:8707-10. [DOI: 10.1039/c6cc04587a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cross-triggered and cascaded recycling amplification enables the highly sensitive electrochemical detection of the mutant p53 gene in human serum.
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Affiliation(s)
- Cuiyun Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Baoting Dou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Jianmei Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
| | - Yun Xiang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
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30
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Feng Y, Wang Q, Lei J, Ju H. Electrochemiluminescent DNA sensing using carbon nitride nanosheets as emitter for loading of hemin labeled single-stranded DNA. Biosens Bioelectron 2015; 73:7-12. [DOI: 10.1016/j.bios.2015.05.042] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 05/05/2015] [Accepted: 05/19/2015] [Indexed: 01/09/2023]
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31
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Zang Y, Lei J, Hao Q, Ju H. CdS/MoS2 heterojunction-based photoelectrochemical DNA biosensor via enhanced chemiluminescence excitation. Biosens Bioelectron 2015; 77:557-64. [PMID: 26476013 DOI: 10.1016/j.bios.2015.10.010] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 10/01/2015] [Accepted: 10/04/2015] [Indexed: 01/16/2023]
Abstract
This work developed a CdS/MoS2 heterojunction-based photoelectrochemical biosensor for sensitive detection of DNA under the enhanced chemiluminescence excitation of luminol catalyzed by hemin-DNA complex. The CdS/MoS2 photocathode was prepared by the stepwise assembly of MoS2 and CdS quantum dots (QDs) on indium tin oxide (ITO), and achieved about 280% increasing of photocurrent compared to pure CdS QDs electrode due to the formation of heterostructure. High photoconversion efficiency in the photoelectrochemical system was identified to be the rapid spatial charge separation of electron-hole pairs by the extension of electron transport time and electron lifetime. In the presence of target DNA, the catalytic hairpin assembly was triggered, and simultaneously the dual hemin-labeled DNA probe was introduced to capture DNA/CdS/MoS2 modified ITO electrode. Thus the chemiluminescence emission of luminol was enhanced via hemin-induced mimetic catalysis, leading to the physical light-free photoelectrochemical strategy. Under optimized conditions, the resulting photoelectrode was proportional to the logarithm of target DNA concentration in the range from 1 fM to 100 pM with a detection limit of 0.39 fM. Moreover, the cascade amplification biosensor demonstrated high selectivity, desirable stability and good reproducibility, showing great prospect in molecular diagnosis and bioanalysis.
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Affiliation(s)
- Yang Zang
- State Key Laboratory of Analytical Chemistry for Life Science, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Jianping Lei
- State Key Laboratory of Analytical Chemistry for Life Science, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
| | - Qing Hao
- State Key Laboratory of Analytical Chemistry for Life Science, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
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32
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Lable-free quadruple signal amplification strategy for sensitive electrochemical p53 gene biosensing. Biosens Bioelectron 2015; 77:157-63. [PMID: 26406456 DOI: 10.1016/j.bios.2015.09.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 08/22/2015] [Accepted: 09/04/2015] [Indexed: 11/21/2022]
Abstract
A versatile label-free quadruple signal amplification biosensing platform for p53 gene (target DNA) detection was proposed. The chitosan-graphene (CS-GR) modified electrode with excellent electron transfer ability could provide a large specific surface for high levels of AuNPs-DNA attachment. The large amount of AuNPs could immobilize more capture probes and enhance the electrochemical signal with the excellent electrocatalytic activity. Furthermore, with the assist of N.BstNB I (the nicking endonuclease), target DNA could be reused and more G-quadruplex-hemin DNAzyme could be formed, allowing significant signal amplification in the presence of H2O2. Such strategy can enhance the oxidation-reduction reaction of adsorbed methylene blue (MB) and efficiently improve the sensitivity of the proposed biosensor. The morphologies of materials and the stepwise biosensor were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and cyclic voltammetry (CV). Differential pulse voltammetry (DPV) signals of MB provided quantitative measures of the concentrations of target DNA, with a linear calibration range of 1.0 × 10(-15)-1.0 × 10(-9)M and a detection limit of 3.0 × 10(-16)M. Moreover, the resulting biosensor also exhibited good specificity, acceptable reproducibility and stability, indicating that the present strategy was promising for broad potential application in clinic assay.
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33
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Ma DL, Wang M, He B, Yang C, Wang W, Leung CH. A Luminescent Cocaine Detection Platform Using a Split G-Quadruplex-Selective Iridium(III) Complex and a Three-Way DNA Junction Architecture. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19060-19067. [PMID: 26284502 DOI: 10.1021/acsami.5b05861] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, a series of 10 in-house cyclometalated iridium(III) complexes bearing different auxiliary ligands were tested for their selectivity toward split G-quadruplex in order to construct a label-free switch-on cocaine detection platform employing a three-way junction architecture and a G-quadruplex motif as a signal output unit. Through two rounds of screening, we discovered that the iridium(III) complex 7 exhibited excellent selectivity toward the intermolecular G-quadruplex motif. A detection limit as low as 30 nM for cocaine can be achieved by this sensing approach with a linear relationship between luminescence intensity and cocaine concentration established from 30 to 300 nM. Furthermore, this sensing approach could detect cocaine in diluted oral fluid. We hope that our simple, signal-on, label-free oligonucleotide-based sensing method for cocaine using a three-way DNA junction architecture could act as a useful platform in bioanalytical research.
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Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University , Hong Kong, China
- Partner State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University , Hong Kong, China
| | - Modi Wang
- Department of Chemistry, Hong Kong Baptist University , Hong Kong, China
| | - Bingyong He
- Department of Chemistry, Hong Kong Baptist University , Hong Kong, China
| | - Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao, China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University , Hong Kong, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao, China
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34
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Tang T, Deng J, Zhang M, Shi G, Zhou T. Quantum dot-DNA aptamer conjugates coupled with capillary electrophoresis: A universal strategy for ratiometric detection of organophosphorus pesticides. Talanta 2015; 146:55-61. [PMID: 26695234 DOI: 10.1016/j.talanta.2015.08.023] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/10/2015] [Accepted: 08/13/2015] [Indexed: 11/29/2022]
Abstract
Based on the highly sensitivity and stable-fluorescence of water-soluble CdTe/CdS core-shell quantum dots (QDs) with broad-specificity DNA aptamers, a novel ratiometric detection strategy was proposed for the sensitive detection of organophosphorus pesticides by capillary electrophoresis with laser-induced fluorescence (CE-LIF). The as-prepared QDs were first conjugated with the amino-modified oligonucleotide (AMO) by amidation reaction, which is partial complementary to the DNA aptamer of organophosphorus pesticides. Then QD-labeled AMO (QD-AMO) was incubated with the DNA aptamer to form QD-AMO-aptamer duplex. When the target organophosphorus pesticides were added, they could specifically bind the DNA aptamer, leading to the cleavage of QD-AMO-aptamer duplex, accompany with the release of QD-AMO. As a result, the ratio of peak height between QD-AMO and QD-AMO-aptamer duplex changed in the detection process of CE-LIF. This strategy was subsequently applied for the detection of phorate, profenofos, isocarbophos, and omethoate with the detection limits of 0.20, 0.10, 0.17, and 0.23μM, respectively. This is the first report about using QDs as the signal indicators for organophosphorus pesticides detection based on broad-specificity DNA aptamers by CE-LIF, thus contributing to extend the scope of application of QDs in different fields. The proposed method has great potential to be a universal strategy for rapid detection of aptamer-specific small molecule targets by simply changing the types of aptamer sequences.
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Affiliation(s)
- Tingting Tang
- School of Ecological and Environmental Sciences, East China Normal University, 500 Dongchuan Road, Shanghai 200241, PR China
| | - Jingjing Deng
- School of Ecological and Environmental Sciences, East China Normal University, 500 Dongchuan Road, Shanghai 200241, PR China
| | - Min Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241 PR China.
| | - Guoyue Shi
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241 PR China
| | - Tianshu Zhou
- School of Ecological and Environmental Sciences, East China Normal University, 500 Dongchuan Road, Shanghai 200241, PR China.
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35
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Wang H, Yuan Y, Chai Y, Yuan R. Sandwiched Electrochemiluminescent Peptide Biosensor for the Detection of Prognostic Indicator in Early-Stage Cancer Based on Hollow, Magnetic, and Self-Enhanced Nanosheets. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:3703-3709. [PMID: 25833656 DOI: 10.1002/smll.201500321] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 03/07/2015] [Indexed: 06/04/2023]
Abstract
Currently, peptide-based protein-recognition has been recognized as an effective and promising approach for protein assays. However, sandwiched peptide-based biosensor with high sensitivity and low background has not been proposed before. Herein, a sandwiched electrochemiluminescence (ECL) peptide-based biosensor is constructed for Cyclin A(2) (CA2), a prognostic indicator in early stage of multiple cancers, based on nanosheets with hollow, magnetic, and ECL self-enhanced properties. First, hollow and magnetic manganese oxide nanocrystals (H-Mn(3)O(4)) are synthesized using triblock copolymeric micelles with core-shell-corona architecture as templates. Then, polyethyleneimine (PEI) and the composite of platinum nanoparticles and tris (4,4'-dicarboxylicacid-2,2'-bipyridyl) ruthenium (II) (PtNPs-Ru) are immobilized on H-Mn(3)O(4) to form H-Mn(3)O(4) -PEI-PtNPs-Ru nanocomposite, in which PEI as coreactant can effectively enhance the luminous efficiency and PtNPs as nanochannels can greatly accelerate the electron transfer. Finally, due to the coordination between Eu(3+) and carboxyl, the obtained H-Mn(3)O(4) -PEI-PtNPs-Ru aggregates locally to form sheet-like nanostructures ((H-Mn(3)O(4) -PEI-PtNPs-Ru)(n) -Eu(3+)), by which the luminous efficiency is further increased. Based on the nanosheets and two designed peptides, a sandwiched ECL biosensor, using palladium nanocages synthesized through galvanic replacement reaction as substrate, is proposed for CA2 with a linear range from 0.001 to 100 ng mL(-1) and a detection limit of 0.3 pg mL(-1).
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Affiliation(s)
- Haijun Wang
- Key Laboratory of Luminescent and Real-TimeAnalytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
| | - Yali Yuan
- Key Laboratory of Luminescent and Real-TimeAnalytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
| | - Yaqin Chai
- Key Laboratory of Luminescent and Real-TimeAnalytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-TimeAnalytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P. R. China
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36
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Zhao M, Liao N, Zhuo Y, Chai YQ, Wang JP, Yuan R. Triple Quenching of a Novel Self-Enhanced Ru(II) Complex by Hemin/G-Quadruplex DNAzymes and Its Potential Application to Quantitative Protein Detection. Anal Chem 2015; 87:7602-9. [DOI: 10.1021/acs.analchem.5b01671] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Min Zhao
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ni Liao
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
- College
of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China
| | - Ying Zhuo
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ya-Qin Chai
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ji-Peng Wang
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ruo Yuan
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
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37
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G-quadruplex DNAzyme-based electrochemiluminescence biosensing strategy for VEGF165 detection: Combination of aptamer-target recognition and T7 exonuclease-assisted cycling signal amplification. Biosens Bioelectron 2015; 74:98-103. [PMID: 26120816 DOI: 10.1016/j.bios.2015.05.069] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 05/19/2015] [Accepted: 05/29/2015] [Indexed: 01/05/2023]
Abstract
The expression profile of vascular endothelial growth factor (VEGF) is highly correlated with the occurrence and development of cancer. This work reports an electrochemiluminescence (ECL) approach for highly sensitive detection of VEGF165. This approach comprises aptamer-target recognition, T7 exonuclease (T7 Exo)-assisted cycling signal amplification and efficient quenching of ECL of CdS:Eu nanocrystals (NCs) by using DNAzyme. In this assay, CdS:Eu NCs were used as the ECL substrate, A guanine (G)-rich single-stranded DNA (ssDNA) sequence and VEGF165 aptamer were co-immobilized on the surface of the CdS:Eu NCs modified glassy carbon electrode. After recognition and binding to VEGF165, the aptamer moved away from the electrode surface and induced the proposed cyclic cleavage of the target DNA with T7 Exo. A large amount of G-rich ssDNA was released on the CdS:Eu film and folded into G-quadruplex/hemin DNAzyme in the presence of hemin and K(+), consequently decreasing the ECL intensity of CdS:Eu. A good linearity was obtained for VEGF165 detection within the range of 1 pM to 20 nM with a detection limit of 0.2 pM. This assay could be a universal and promising protocol for detection of various biomarkers for early clinical diagnosis.
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38
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Au nanoparticles decorated C60 nanoparticle-based label-free electrochemiluminesence aptasensor via a novel “on-off-on” switch system. Biomaterials 2015; 52:476-83. [DOI: 10.1016/j.biomaterials.2015.02.058] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 02/11/2015] [Accepted: 02/13/2015] [Indexed: 12/22/2022]
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39
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Zhou H, Liu J, Zhang S. Quantum dot-based photoelectric conversion for biosensing applications. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2014.12.007] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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40
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Wang GL, Shu JX, Dong YM, Wu XM, Zhao WW, Xu JJ, Chen HY. Using G-Quadruplex/Hemin To “Switch-On” the Cathodic Photocurrent of p-Type PbS Quantum Dots: Toward a Versatile Platform for Photoelectrochemical Aptasensing. Anal Chem 2015; 87:2892-900. [DOI: 10.1021/ac5043945] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Guang-Li Wang
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
- State
Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, Jiangsu, China
| | - Jun-Xian Shu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Yu-Ming Dong
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Xiu-Ming Wu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Wei-Wei Zhao
- State
Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, Jiangsu, China
| | - Jing-Juan Xu
- State
Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, Jiangsu, China
| | - Hong-Yuan Chen
- State
Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, Jiangsu, China
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41
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Huang Y, Lei J, Cheng Y, Ju H. Target-assistant Zn2+-dependent DNAzyme for signal-on electrochemiluminescent biosensing. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.165] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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42
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Lou J, Wang Z, Wang X, Bao J, Tu W, Dai Z. Highly sensitive “signal-on” electrochemiluminescent biosensor for the detection of DNA based on dual quenching and strand displacement reaction. Chem Commun (Camb) 2015; 51:14578-81. [DOI: 10.1039/c5cc06156c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A “signal-on” electrochemiluminescent DNA biosensing platform was proposed based on dual quenching and the strand displacement reaction.
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Affiliation(s)
- Jing Lou
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- P. R. China
| | - Zhaoyin Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- P. R. China
| | - Xiao Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- P. R. China
| | - Jianchun Bao
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- P. R. China
| | - Wenwen Tu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- P. R. China
| | - Zhihui Dai
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- P. R. China
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43
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Wu P, Hou X, Xu JJ, Chen HY. Electrochemically Generated versus Photoexcited Luminescence from Semiconductor Nanomaterials: Bridging the Valley between Two Worlds. Chem Rev 2014; 114:11027-59. [DOI: 10.1021/cr400710z] [Citation(s) in RCA: 216] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Peng Wu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China
| | - Xiandeng Hou
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Normal University, Jinan 250014, P.R. China
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44
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Jing P, Xu W, Yi H, Wu Y, Bai L, Yuan R. An amplified electrochemical aptasensor for thrombin detection based on pseudobienzymic Fe3O4-Au nanocomposites and electroactive hemin/G-quadruplex as signal enhancers. Analyst 2014; 139:1756-61. [PMID: 24519466 DOI: 10.1039/c3an02237d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sensitive and selective electrochemical aptasensor for thrombin detection was constructed based on hemin/G-quadruplex as the signal label and Fe3O4-Au nanocomposites with glucose oxidase (GOx-) and peroxide-mimicking enzyme activity as the signal enhancers. Due to their large surface area and good biocompatibility, Fe3O4-Au nanocomposites were employed to immobilize electroactive hemin/G-quadruplex, which was formed by the conjugation between a single-stranded guanine-rich nucleic acid and hemin. Based on the GOx-mimicking enzyme activity, Au nanoparticles on the surface of the Fe3O4-Au nanocomposites effectively catalyzed the oxidization of glucose in the presence of dissolved O2, accompanied by the production of H2O2. Both the Fe3O4 cores of Fe3O4-Au nanocomposites and hemin/G-quadruplex with H2O2-mimicking enzyme activity could catalyze the reduction of the generated H2O2, which promoted the electron transfer of hemin and amplified the electrochemical signal. The proposed electrochemical aptasensor had a wide dynamic linear range of 0.1 pM to 20 nM with a lower detection limit of 0.013 pM, which provided a promising method for a sensitive assay for the detection of proteins in electrochemical aptasensors.
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Affiliation(s)
- Pei Jing
- Education Ministry Key Laboratory on Luminescence and Real-TimeAnalysis, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
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45
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Wang H, He Y, Chai Y, Yuan R. A super intramolecular self-enhanced electrochemiluminescence immunosensor based on polymer chains grafted on palladium nanocages. NANOSCALE 2014; 6:10316-10322. [PMID: 25072965 DOI: 10.1039/c4nr02808b] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
An intramolecular self-enhanced electrochemiluminescent derivative is prepared by grafting polystyrene (PS)-based polymer chains with pendant Ru(ii) luminophore from poly(ethylenimine) (PEI) on the surface of palladium nanocages (PdNCs). In this way, the Ru(ii) luminophore and its co-reactive group (amine groups in PEI) exist in the same polymer molecule, which shortens the electronic transmission distance between them and enhances the luminous stability. Meanwhile, through atom transfer radical polymerization (ATRP), the loading amount of Ru(ii) luminophore is greatly increased. Therefore, the obtained electrochemiluminescent derivative (PdNC-PEI-PSRu) has high luminous efficiency and stability. Furthermore, due to their special nanostructures of porous walls and hollow interiors, PdNCs have great advantages in high specific surface areas and good electrocatalytic ability, which make them act as an excellent immobilized platform for PEI and detection antibody. Based on the sandwiched immunoreactions, a sensitive "signal on" electrochemiluminescence immunosensor is constructed for the detection of carbohydrate antigen 15-3 (CA 15-3). As a result, a wide linear range from 0.01 U mL(-1) to 120 U mL(-1) is acquired with a relatively low detection limit of 0.003 U mL(-1).
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Affiliation(s)
- Haijun Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
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46
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Liu Y, Lei J, Huang Y, Ju H. "Off-on" electrochemiluminescence system for sensitive detection of ATP via target-induced structure switching. Anal Chem 2014; 86:8735-41. [PMID: 25118587 DOI: 10.1021/ac501913c] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An "off-on" electrochemiluminescence (ECL) strategy was constructed for highly sensitive and selective detection of adenosine 5'-triphosphate (ATP) with a quantum dots (QDs) modified electrode and a DNAzyme signal probe. The immobilized QDs were functionalized with a DNA sequence (DNA1) and then aptamer for recognition of target analyte. The signal probe was prepared by assembling another DNA sequence (DNA2) and G-quadruplex on gold nanoparticle via Au-S chemistry, which was used to bind the probe to electrode surface through a hybridization reaction with aptamer and hemin for forming G-quadruplex/hemin DNAzyme, respectively. Upon the sandwich hybridization of DNA1-aptamer-DNA2, the signal probe could be captured on the aptasensor to catalyze the reduction of dissolved oxygen, the coreactant for cathodic ECL emission of QDs, leading to a decrease of ECL intensity and thus the "off" state. In the presence of target, its recognition by aptamer led to the release of aptamer from electrode surface and decreased the amount of captured signal probe, thus the ECL emission was in its "on" state. The "off-on" strategy resulted from the target-induced structure switching could be used for specific detection of ATP with a linear range of 8-2000 nM and a detection limit of 7.6 nM. The proposed aptasensor could be successfully applied in the ECL detection of ATP in human serum. This method could resist environmental interfering agents and be extended for sensitive and reliable detection of a wide range of analytes in complex sample.
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Affiliation(s)
- Yueting Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P.R. China
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47
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Ma DL, Lin S, Leung KH, Zhong HJ, Liu LJ, Chan DSH, Bourdoncle A, Mergny JL, Wang HMD, Leung CH. An oligonucleotide-based label-free luminescent switch-on probe for RNA detection utilizing a G-quadruplex-selective iridium(III) complex. NANOSCALE 2014; 6:8489-8494. [PMID: 24816304 DOI: 10.1039/c4nr00541d] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report herein the synthesis and application of a novel G-quadruplex-selective luminescent iridium(iii) complex for the construction of an oligonucleotide-based, label-free, rapid and convenient luminescent RNA detection platform.
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Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
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48
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Sang F, Huang X, Ren J. Characterization and separation of semiconductor quantum dots and their conjugates by capillary electrophoresis. Electrophoresis 2014; 35:793-803. [DOI: 10.1002/elps.201300528] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 12/03/2013] [Accepted: 12/03/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Fuming Sang
- School of Marine Science and Technology; Harbin Institute of Technology; Weihai P. R. China
| | - Xiangyi Huang
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai P. R. China
| | - Jicun Ren
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai P. R. China
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