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Chen Z, Xiong F, Yu A, Lai G. Aptamer biorecognition-triggered DNAzyme liberation and Exo III-assisted target recycling for ultrasensitive homogeneous colorimetric bioassay of kanamycin antibiotic. Chem Commun (Camb) 2019; 55:3959-3962. [PMID: 30874255 DOI: 10.1039/c8cc10107h] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel peroxidase-mimicking DNAzyme-based colorimetric homogenous bioassay is developed for kanamycin detection. Aptamer biorecognition triggers DNAzyme liberation from DNA duplexes for "off-on" signal transduction. The special hairpin structure of the aptamer-kanamycin biocomposite enables Exo III-assisted target recycling for signal amplification.
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Affiliation(s)
- Zhichao Chen
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, P. R. China.
| | - Feng Xiong
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, P. R. China.
| | - Aimin Yu
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, P. R. China. and Department of Chemistry and Biotechnology, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn VIC 3122, Australia
| | - Guosong Lai
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, P. R. China.
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Chronocoulometric aptamer based assay for staphylococcal enterotoxin B by target-triggered assembly of nanostructured dendritic nucleic acids on a gold electrode. Mikrochim Acta 2019; 186:109. [PMID: 30637509 DOI: 10.1007/s00604-019-3236-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/05/2019] [Indexed: 01/01/2023]
Abstract
A rapid and ultrasensitive method is described for the detection of staphylococcal enterotoxin B (SEB). It is based on the formation of a dendritic DNA superstructure by integrating (a) target-induced triggering of DNA release with (b) signal amplification by a hybridization chain reaction. Partially complementary pairing of aptamer and trigger DNA forms a duplex structure. The capture DNA is then placed on the surface of a gold electrode through gold-thiol chemistry. In the presence of SEB, the aptamer-target conjugate is compelled to form. This causes the release of trigger DNA owing to a strong competition with SEB. The trigger DNA is subsequently hybridized with the partial complementary sequences of the capture DNA to trigger HCR with three auxiliary DNA sequances (referred to as H1, H2, H3). Finally, the dendritic DNA superstructure is bound to hexaammineruthenium(III) cation by electrostatic adsorption and assembled onto the modified gold electrode. This produces an amplified electrochemical signal that is measured by chronocoulometry. Under optimal conditions, the charge difference increases linearly with the logarithm of the SEB concentrations in the range from 5 pg·mL-1 to 100 ng·mL-1 with a detection limit as low as 3 pg·mL-1 (at S/N = 3). Graphical abstract An electrochemical switching strategy is presented for the sensitive detection of Staphylococcus enterotoxin B based on target-triggered assembly of dendritic nucleic acid nanostructures.
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Mittal S, Thakur S, Mantha AK, Kaur H. Bio-analytical applications of nicking endonucleases assisted signal-amplification strategies for detection of cancer biomarkers -DNA methyl transferase and microRNA. Biosens Bioelectron 2019; 124-125:233-243. [DOI: 10.1016/j.bios.2018.10.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/27/2018] [Accepted: 10/01/2018] [Indexed: 12/31/2022]
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An enzyme-free electrochemiluminescence biosensor for ultrasensitive assay of Group B Streptococci based on self-enhanced luminol complex functionalized CuMn-CeO 2 nanospheres. Biosens Bioelectron 2018; 127:167-173. [PMID: 30599385 DOI: 10.1016/j.bios.2018.12.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 12/07/2018] [Accepted: 12/10/2018] [Indexed: 11/23/2022]
Abstract
Herein, a novel and pragmatic electrochemiluminescence (ECL) biosensing method was developed for ultrasensitive and specific detection of Group B Streptococci (GBS) by combining self-enhanced luminol complex functionalized CuMn-CeO2 (CuMn-CeO2-PEI-luminol) with MNAzyme-mediated target-recycling amplification. First, the efficient self-enhanced PEI-luminol luminophore was prepared by combining PEI co-reactant with luminol in one molecular, which shortened electron transfer distance and enhanced ECL signal. And CuMn-CeO2 was applied to load a large number of PEI-luminol and strengthen luminous efficiency of luminol by the high catalytic activity toward H2O2 oxidation. Then, target-driven MNAzyme system was used to realize the circulation of GBS nucleic acid sequence, producing plentiful triggers to initiate the hybridization reaction on the surface of electrode. The developed enzyme-free ECL biosensor showed ultra-sensitivity for target DNA detection with detection limits of 68 aM (synthetic DNA) and 5 × 102 CFU mL-1 (genomic DNA extracted from GBS strain). More importantly, this biosensor was successfully applied for detection of genomic DNA of GBS extracted from clinical vaginal/anal swabs as low as 320 copies. Thus, this proposed strategy might be an pragmatic ECL platform for ultrasensitive and specific detection of GBS in clinical vaginal/anal swabs.
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55
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Liu J, Zhang Y, Zhao Q, Situ B, Zhao J, Luo S, Li B, Yan X, Vadgama P, Su L, Ma W, Wang W, Zheng L. Bifunctional aptamer-mediated catalytic hairpin assembly for the sensitive and homogenous detection of rare cancer cells. Anal Chim Acta 2018; 1029:58-64. [PMID: 29907291 DOI: 10.1016/j.aca.2018.04.068] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 04/18/2018] [Accepted: 04/27/2018] [Indexed: 12/17/2022]
Abstract
The presence of cancer cells in body fluids confirms the occurrence of metastasis and guides treatment. A simple, fast, and homogeneous fluorescent method was developed to detect cancer cells based on catalytic hairpin assembly (CHA) and bifunctional aptamers. The bifunctional aptamer had a recognition domain for binding to target cancer cells and an initiator domain for triggering the CHA reaction. In the presence of target cells, the bifunctional aptamer was released from the inhibitor and initiated a cascade reaction of assembly and disassembly of the hairpins. Separation of the fluorophores from the quenchers produced fluorescence signals. The proposed strategy showed high specificity for discriminating normal cells and leukocytes, and the detection limit was 10 cells/mL, which was lower than that of previous aptasensors. This assay was further tested using four kinds of clinical samples spiked with target cells to confirm its applicability. We developed a simple, rapid, and cost-effective method for the detection of cancer cells that did not require purification, and the approach holds great potential for bioanalysis and early diagnosis.
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Affiliation(s)
- Jumei Liu
- Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China
| | - Ye Zhang
- Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China
| | - Qianwen Zhao
- Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China
| | - Bo Situ
- Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China
| | - Jiamin Zhao
- Department of Laboratory Medicine, Affiliated Foshan Maternity & Child Healthcare Hospital, Southern Medical University, Foshan, 528000, Guangdong Province, PR China
| | - Shihua Luo
- Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China
| | - Bo Li
- Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China
| | - Xiaohui Yan
- Clinical Experimental Research Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China
| | - Pankaj Vadgama
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK
| | - Lei Su
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK
| | - Wen Ma
- Center of Clinical Laboratory, Shenzhen Hospital, Southern Medical University, Shenzhen, 518100, Guangdong Province, PR China
| | - Wen Wang
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK; Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China.
| | - Lei Zheng
- Department of Laboratory Medicine/Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong Province, PR China.
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56
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Ji R, Chen S, Xu W, Qin Z, Qiu JF, Li CR. A voltammetric immunosensor for clenbuterol based on the use of a MoS 2-AuPt nanocomposite. Mikrochim Acta 2018; 185:209. [PMID: 29594630 DOI: 10.1007/s00604-018-2746-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 02/20/2018] [Indexed: 10/17/2022]
Abstract
An ultrasensitive immunosensor for the direct detection of the illegally used livestock feed clebuterol (CLB) is described. It is based on the use of a glassy carbon electrode modified with an MoS2-AuPt nanocomposite and on biotin-streptavidin interaction. The use of MoS2-AuPt accelerates electron transfer, and this leads to a sharp increase in the electrochemical signal for the electrochemical probe hydrogen peroxide. Differential pulse voltammetry was used to record the current signal at a peak potential of -0.18 V (vs SCE). Under optimal conditions, the electrode has a linear response in the 10 pg·mL-1 to 100 ng·mL-1 CLB concentration range and a 6.9 pg·mL-1 detection limit (based on the 3σ criterium). This immunosensor is sensitive, highly specific and acceptably reproducible, and thus represents a valuable tool for the determination of CLB in pork. Graphical abstract Schematic of a voltammetric immunosensor for the determination of clenbuterol (CLB) based on the use of a nanocomposite prepared from molybdenum disulfide and a gold-platinum alloy (MoS2-AuPt), and making use of the biotin-streptavidin system.
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Affiliation(s)
- Renyue Ji
- School of Public Health and Management, Chongqing Medical University, Box 197#, No.1 ,Yi Xue Yuan Road, Yuzhong district, Chongqing, 400016, People's Republic of China
| | - Shuai Chen
- School of Public Health and Management, Chongqing Medical University, Box 197#, No.1 ,Yi Xue Yuan Road, Yuzhong district, Chongqing, 400016, People's Republic of China
| | - Wei Xu
- School of Public Health and Management, Chongqing Medical University, Box 197#, No.1 ,Yi Xue Yuan Road, Yuzhong district, Chongqing, 400016, People's Republic of China
| | - Zhen Qin
- School of Public Health and Management, Chongqing Medical University, Box 197#, No.1 ,Yi Xue Yuan Road, Yuzhong district, Chongqing, 400016, People's Republic of China
| | - Jing Fu Qiu
- School of Public Health and Management, Chongqing Medical University, Box 197#, No.1 ,Yi Xue Yuan Road, Yuzhong district, Chongqing, 400016, People's Republic of China.
| | - Chao Rui Li
- School of Public Health and Management, Chongqing Medical University, Box 197#, No.1 ,Yi Xue Yuan Road, Yuzhong district, Chongqing, 400016, People's Republic of China.
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57
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Guo Z, Qiao B, Guo Q, Zhang H, Cai C, Feng JJ. Dual-signal ratiometric electrochemiluminescence assay for detecting the activity of human methyltransferase. Analyst 2018; 143:3353-3359. [DOI: 10.1039/c8an00611c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A ratiometric electrochemiluminescence assay using CdS:Eu NCs and luminol as signal emitters was fabricated for detecting the human methyltransferase activity.
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Affiliation(s)
- Zhihui Guo
- Jiangsu Key Laboratory of Biomedical Materials
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of New Power Batteries
- College of Chemistry and Materials Science
| | - Bin Qiao
- Jiangsu Key Laboratory of Biomedical Materials
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of New Power Batteries
- College of Chemistry and Materials Science
| | - Qunqun Guo
- Jiangsu Key Laboratory of Biomedical Materials
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of New Power Batteries
- College of Chemistry and Materials Science
| | - Hui Zhang
- Jiangsu Key Laboratory of Biomedical Materials
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of New Power Batteries
- College of Chemistry and Materials Science
| | - Chenxin Cai
- Jiangsu Key Laboratory of Biomedical Materials
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of New Power Batteries
- College of Chemistry and Materials Science
| | - Jiu-Ju Feng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- College of Chemistry and Life Sciences
- Zhejiang NormalUniversity
- Jinhua 321004
- China
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58
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Liu MX, Liang S, Tang Y, Tian J, Zhao Y, Zhao S. Rapid and label-free fluorescence bioassay for microRNA based on exonuclease III-assisted cycle amplification. RSC Adv 2018; 8:15967-15972. [PMID: 35542241 PMCID: PMC9080109 DOI: 10.1039/c8ra01605d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 03/18/2018] [Indexed: 11/21/2022] Open
Abstract
A new assay for the rapid and simple detection of microRNA based on G-quadruplex and Exonuclease III (ExoIII) dual signal amplification was constructed.
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Affiliation(s)
- Ming Xiu Liu
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
- School of Chemistry and Pharmaceutical Science of Guangxi Normal University
- Guilin
- China
| | - Shuping Liang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
- School of Chemistry and Pharmaceutical Science of Guangxi Normal University
- Guilin
- China
| | - Yafang Tang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
- School of Chemistry and Pharmaceutical Science of Guangxi Normal University
- Guilin
- China
| | - Jianniao Tian
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
- School of Chemistry and Pharmaceutical Science of Guangxi Normal University
- Guilin
- China
| | - YanChun Zhao
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
- School of Chemistry and Pharmaceutical Science of Guangxi Normal University
- Guilin
- China
| | - Shulin Zhao
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
- School of Chemistry and Pharmaceutical Science of Guangxi Normal University
- Guilin
- China
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59
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Shi L, Rong X, Wang Y, Ding S, Tang W. High-performance and versatile electrochemical aptasensor based on self-supported nanoporous gold microelectrode and enzyme-induced signal amplification. Biosens Bioelectron 2017; 102:41-48. [PMID: 29121558 DOI: 10.1016/j.bios.2017.11.012] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/13/2017] [Accepted: 11/01/2017] [Indexed: 12/22/2022]
Abstract
Herein, novel and versatile electrochemical aptasensors were constructed on a self-supported nanoporous gold (np-Au) microelectrode, integrating with an exonuclease III (Exo III) induced signal amplification strategy. Self-supported np-Au microelectrode with 3D bicontinuous nanoporous structures possesses tremendously large specific area, clean surface, high stability and biocompatibility, bringing about significant advantages in both molecular recognition and signal response. As paradigms, two analytes of bisphenol A (BPA) and ochratoxin A (OTA) were selected to demonstrate the superiority and versatility of designed aptasensors. Trace amounts of mDNA (associated with BPA or OTA concentration) hybridized with cDNA strands assembled on np-Au microelectrode, activating the cleavage reaction with Exo III. Thus, cDNA was digested and mDNA was released to undergo a new hybridization and cleavage cycle. Finally, residual cDNA strands were recognized by methylene blue labelled rDNA/AuNPs with the assistance of hDNA to generate the electrochemical signals, which were used to quantitatively monitor targets. Under the optimized conditions, prepared aptasensors exhibited wide linear ranges (25pg/mL to 2ng/mL for BPA, 10pg/mL to 5ng/mL for OTA) with ultralow detection limits (10pg/mL for BPA, 5pg/mL for OTA), excellent selectivity and stability, and reliable detection in real samples. This work opens a new horizon for constructing promising electrochemical aptasensors for environmental monitoring, medical diagnostics and food safety.
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Affiliation(s)
- Lei Shi
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Xiaojiao Rong
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Yan Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Shiming Ding
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China.
| | - Wanying Tang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
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60
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Si Z, Xie B, Chen Z, Tang C, Li T, Yang M. Electrochemical aptasensor for the cancer biomarker CEA based on aptamer induced current due to formation of molybdophosphate. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2338-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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61
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Voltammetric determination of lead(II) by using exonuclease III and gold nanoparticles, and by exploiting the conformational change of the complementary strand of an aptamer. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2316-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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62
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Yin Y, Shi L, Chu Z, Jin W. A highly sensitive electrochemical IFN-γ aptasensor based on a hierarchical graphene/AuNPs electrode interface with a dual enzyme-assisted amplification strategy. RSC Adv 2017. [DOI: 10.1039/c7ra07817j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
A new signal-on electrochemical aptasensor for IFN-γ assay is constructed on a hierarchical graphene/AuNPs modified electrode coupled with a dual enzyme-assisted signal amplification strategy.
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Affiliation(s)
- Yu Yin
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang 212003
- P. R. China
| | - Lei Shi
- State Key Laboratory of Lake Science and Environment
- Nanjing Institute of Geography and Limnology
- Chinese Academy of Sciences
- Nanjing 210008
- P. R. China
| | - Zhenyu Chu
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
| | - Wanqin Jin
- State Key Laboratory of Materials-Oriented Chemical Engineering
- College of Chemical Engineering
- Nanjing Tech University
- Nanjing 210009
- P. R. China
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63
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Dai Z, Gao Q, Cheung MC, Leung HM, Lau TCK, Sleiman HF, Lai KWC, Lo PK. A highly versatile platform based on geometrically well-defined 3D DNA nanostructures for selective recognition and positioning of multiplex targets. NANOSCALE 2016; 8:18291-18295. [PMID: 27775745 DOI: 10.1039/c6nr05411k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We develop a versatile recognition system based on 3D triangular-shaped DNA nanotubes by integrating three different aptamer sequences along the three edges. This would allow multiple binding activities to be combined into a single system. The versatility of this nanotube platform can also provide a framework for spatial orientation and positioning of different aptamer-binding ligands in a 'pea-pod' architecture.
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Affiliation(s)
- Ziwen Dai
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, Chinaand Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China.
| | - Qi Gao
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, China
| | - Man Ching Cheung
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, Chinaand Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China.
| | - Hoi Man Leung
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, Chinaand Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China.
| | - Terrence Chi Kong Lau
- Department of Biomedical Sciences, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, China
| | - Hanadi F Sleiman
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 2K6, Canada
| | - King Wai Chiu Lai
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, China
| | - Pik Kwan Lo
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, Chinaand Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China.
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64
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Feng C, Mao X, Yang Y, Zhu X, Yin Y, Li G. Rolling circle amplification in electrochemical biosensor with biomedical applications. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.07.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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65
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Gribas AV, Zatsepin TS, Korolev SP, Gottikh MB, Sakharov IY. Suicide inactivation of covalent peroxidase-mimicking DNAzyme with hydrogen peroxide and its protection by a reductant substrate. Talanta 2016; 155:212-5. [DOI: 10.1016/j.talanta.2016.04.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/12/2016] [Accepted: 04/16/2016] [Indexed: 12/29/2022]
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66
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Li X, Ding X, Li Y, Wang L, Fan J. A TiS2 nanosheet enhanced fluorescence polarization biosensor for ultra-sensitive detection of biomolecules. NANOSCALE 2016; 8:9852-9860. [PMID: 27120690 DOI: 10.1039/c6nr00946h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Development of new strategies for the sensitive and selective detection of ultra-low concentrations of specific cancer markers is of great importance for assessing cancer therapeutics due to its crucial role in early clinical diagnoses and biomedical applications. In this work, we have developed two types of fluorescence polarization (FP) amplification assay strategies for the detection of biomolecules by using TiS2 as a FP enhancer and Zn(2+)-dependent self-hydrolyzing deoxyribozymes as catalysts to realize enzyme-catalyzed target-recycling signal amplification. One approach is based on the terminal protection of small-molecule-linked DNA, in which biomolecular binding to small molecules in DNA-small-molecule chimeras can protect the conjugated DNA from degradation by exonuclease I (Exo I); the other approach is based on the terminal protection of biomolecular bound aptamer DNA, in which biomolecules directly bound to the single strand aptamer DNA can protect the ssDNA from degradation by Exo I. We select folate receptor (FR) and thrombin (Tb) as model analytes to verify the current concept. It is shown that under optimized conditions, our strategies exhibit high sensitivity and selectivity for the quantification of FR and Tb with low detection limits (0.003 ng mL(-1) and 0.01 pM, respectively). Additionally, this strategy is a simple "mix and detect" approach, and does not require any separation steps. This biosensor is also utilized in the analysis of real biological samples, the results agree well with those obtained by the enzyme-linked immunosorbent assay (ELISA).
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Affiliation(s)
- Xiang Li
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
| | - Xuelian Ding
- Department of Chemistry, Sanquan Medical College, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
| | - Yongfang Li
- Life Science College, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
| | - Linsong Wang
- Life Science College, Henan Normal University, Xinxiang, Henan, 453007, P. R. China
| | - Jing Fan
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, P. R. China.
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67
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Homogeneous electrochemical immunoassay of aflatoxin B1 in foodstuff using proximity-hybridization-induced omega-like DNA junctions and exonuclease III-triggered isothermal cycling signal amplification. Anal Bioanal Chem 2016; 408:8593-8601. [DOI: 10.1007/s00216-016-9343-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 01/08/2016] [Accepted: 01/15/2016] [Indexed: 01/11/2023]
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68
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Abnous K, Danesh NM, Sarreshtehdar Emrani A, Ramezani M, Taghdisi SM. A novel fluorescent aptasensor based on silica nanoparticles, PicoGreen and exonuclease III as a signal amplification method for ultrasensitive detection of myoglobin. Anal Chim Acta 2016; 917:71-8. [PMID: 27026602 DOI: 10.1016/j.aca.2016.02.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 02/22/2016] [Accepted: 02/27/2016] [Indexed: 10/22/2022]
Abstract
Measurement of myoglobin (Mb) in human blood serum is of great interest for quick diagnosis of acute myocardial infarction (AMI). In this study, a novel fluorescent aptasensor was designed for ultrasensitive and selective detection of Mb, based on target-induced high fluorescence intensity, complementary strand of aptamer (CS), PicoGreen (PG) dye, exonuclease III (Exo III) and silica nanoparticles coated with streptavidin (SNPs-Streptavidin). The developed aptasensor obtains characteristics of SNPs as enhancers of fluorescence intensity, Exo III as an enzyme which selectively digests the 3'-end of double-stranded DNA (dsDNA), PG as a fluorescent dye which could selectively bind to dsDNA and high selectivity and sensitivity of aptamer (Apt) toward its target. In the absence of Mb, no free CS remains in the environment of SNPs-Streptavidin, resulting in a weak fluorescence emission. In the present of Mb, dsDNA-modified SNPs-Streptavidin complex forms, leading to a very strong fluorescence emission. The developed fluorescent aptasensor exhibited high specificity toward Mb with a limit of detection (LOD) as low as 52 pM. In addition, the designed fluorescent aptasensor was efficiently used to detect Mb in human serum.
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Affiliation(s)
- Khalil Abnous
- Academic Center for Education, Culture and Research (ACECR)-Mashhad Branch, Mashhad, Iran; Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Noor Mohammad Danesh
- Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran; Research Institute of Sciences and New Technology, Mashhad, Iran
| | | | - Mohammad Ramezani
- Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Seyed Mohammad Taghdisi
- Targeted Drug Delivery Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
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69
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Cong X, Fan GC, Wang X, Abdel-Halim ES, Zhu JJ. Enhanced photoelectrochemical aptasensing platform amplified through the sensitization effect of CdTe@CdS core–shell quantum dots coupled with exonuclease-I assisted target recycling. J Mater Chem B 2016; 4:6117-6124. [DOI: 10.1039/c6tb01807f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The sensitization of CdTe@CdS core–shell quantum dots on N-doped mesoporous TiO2, integrated with exonuclease-I assisted target recycling, was applied to construct an enhanced photoelectrochemical aptasensing platform.
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Affiliation(s)
- Xinxin Cong
- College of Chemistry
- Chemical Engineering and Materials Science
- Shandong Normal University
- Jinan
- P. R. China
| | - Gao-Chao Fan
- State Key Laboratory of Analytical Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- P. R. China
| | - Xiaolei Wang
- College of Chemistry
- Chemical Engineering and Materials Science
- Shandong Normal University
- Jinan
- P. R. China
| | - E. S. Abdel-Halim
- Chemistry Department
- College of Science
- King Saud University
- Riyadh
- Saudi Arabia
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
- P. R. China
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