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Cheng Z, Wei J, Gu L, Zou L, Wang T, Chen L, Li Y, Yang Y, Li P. DNAzyme-based biosensors for mercury (Ⅱ) detection: Rational construction, advances and perspectives. JOURNAL OF HAZARDOUS MATERIALS 2022; 431:128606. [PMID: 35278952 DOI: 10.1016/j.jhazmat.2022.128606] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/17/2022] [Accepted: 02/27/2022] [Indexed: 06/14/2023]
Abstract
Mercury contamination is one of the most severe issues in society due to its threats to public health and the ecological system. However, traditional methods for mercury ion detection are still limited by their time-consuming procedures, requirement of expensive instruments, and low selectivity. In recent decades, tremendous progress has been made in the development of functional nucleic acid-based, especially DNAzyme sensors for mercury (Ⅱ) (Hg2+) determination, including RNA-cleaving DNAzymes and G-quadruplex-based DNAzymes in particular. Researchers have heavily studied the construction of Hg2+ sensors, mainly originating from in vitro selection-derived DNAzymes, by incorporating T-Hg2+-T recognition moieties in existing DNAzyme scaffolds, and interfacing Hg2+-sensitive sequences with nanomaterials. In the last case, the employment of materials (as quenchers, signal transducers and DNA immobilizers) enriches the application scenarios of current Hg2+-DNAzymes, due to a combination of their functions. We summarize a broad range of sensing approaches, including optical, electrochemical, and other sensing methods, and compare their features. This review elaborates on the rational design strategies for engineering DNAzymes to selectively sense Hg2+, critically discusses their properties in different application scenarios, and summarizes recent advances in this field. Additionally, current progress, challenges and future perspectives are also discussed. This minireview provides deeper insights into the chemistry of these functional nucleic acids when working with Hg2+, explains the design ideas of DNAzyme-sensors in each platform, and reveals potential opportunities in developing more advanced DNAzyme sensors for the highly selective and sensitive recognition of Hg2+. ENVIRONMENTAL IMPLICATION: Mercury is one of the most toxic metallic contaminants due to its high toxicity, non-biodegradability, and serious human health risks when accumulated in the body. In the recent decade, intensive studies have focused on exploring mercury sensors by combining DNAzymes with various sensing methods, paving a promising avenue to gain ultra-high sensitivity and selectivity. However, so far, no review has introduced the recent advances on DNAzyme-based sensors for mercury detection in a critical way. In this review, we comprehensively summarized the studies on DNAzyme-based sensors for mercury detection using various sensing techniques including optical, electrochemical and other sensing methods.
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Affiliation(s)
- Zehua Cheng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Jinchao Wei
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Liqiang Gu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Liang Zou
- School of Medicine, Chengdu University, Chengdu 610106, China
| | - Ting Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Ling Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yuqing Li
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China; Institute of Molecular Medicine (IMM), Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Yu Yang
- Institute of Molecular Medicine (IMM), Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Peng Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China.
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A review on nanostructure-based mercury (II) detection and monitoring focusing on aptamer and oligonucleotide biosensors. Talanta 2020; 220:121437. [PMID: 32928439 DOI: 10.1016/j.talanta.2020.121437] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/11/2020] [Accepted: 07/19/2020] [Indexed: 02/08/2023]
Abstract
Heavy metal ion pollution is a severe problem in environmental protection and especially in human health due to their bioaccumulation in organisms. Mercury (II) (Hg2+), even at low concentrations, can lead to DNA damage and give permanent harm to the central nervous system by easily passing through biological membranes. Therefore, sensitive detection and monitoring of Hg2+ is of particular interest with significant specificity. In this review, aptamer-based strategies in combination with nanostructures as well as several other strategies to solve addressed problems in sensor development for Hg2+ are discussed in detail. In particular, the analytical performance of different aptamer and oligonucleotide-based strategies using different signal improvement approaches based on nanoparticles were compared within each strategy and in between. Although quite a number of the suggested methodologies analyzed in this review fulfills the standard requirements, further development is still needed on real sample analysis and analytical performance parameters.
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Chen CG, Vijay N, Thirumalaivasan N, Velmathi S, Wu SP. Coumarin-based Hg 2+ fluorescent probe: Fluorescence turn-on detection for Hg 2+ bioimaging in living cells and zebrafish. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 219:135-140. [PMID: 31030041 DOI: 10.1016/j.saa.2019.04.048] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/12/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
The need in developing fluorescent probes for trace metal ion detection in biological samples has been an important issue. Herein, a reaction-based fluorescent probe PIC containing a perimidine moiety was designed and synthesized for Hg2+ detection. The probe can selectively distinguish Hg2+ with 42-fold fluorescent enhancement from the other metal ions at physiological pH. This probe can detect Hg2+ with the detection limit of 1.08 μM. The sensor PIC can be applied to real-time detection of Hg2+ in cells with blue emission.
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Affiliation(s)
- Chong-Guang Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Natarajan Vijay
- Organic and Polymer Synthesis Laboratory, Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India
| | | | - Sivan Velmathi
- Organic and Polymer Synthesis Laboratory, Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015, India.
| | - Shu-Pao Wu
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan.
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Fluorometric determination of mercury(II) by using thymine-thymine mismatches as recognition elements, toehold binding, and enzyme-assisted signal amplification. Mikrochim Acta 2019; 186:551. [PMID: 31324987 DOI: 10.1007/s00604-019-3683-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 07/07/2019] [Indexed: 10/26/2022]
Abstract
A highly sensitive fluorometric method is described for the determination of mercury(II) ions. It is based on (a) the use of a DNA probe containing thymine-thymine mismatches that are employed as Hg(II) recognition elements, (b) subsequent toehold binding, and (c) endocuclease-assisted signal amplification. Target recycling is triggered by exonuclease III. This produces a large amount of ssDNA (defined as primer). Then, the generated primer-initiated strand displacement reaction with the help of polymerase and nicking endonuclease releases the free fluorophore-labelled probe. Under excitation at 532 nm, the fluorescent probe displays emission with a peak at 582 nm. The sensitivity of this method is improved by introduction of nicking endonuclease. The working range of the assay extends from 20 pM to 10 nM, and the detection limit is as low as 6 pM of Hg(II). Graphical abstract Schematic presentation of the fluorometric method for determination of mercury(II). By using a special structure of thymine-thymine mismatches, target-induced toehold binding and enzyme-assisted signal amplification strategy were employed. This method is selective and good performance in real sample application.
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Combining DNA-stabilized silver nanocluster synthesis with exonuclease III amplification allows label-free detection of coralyne. Anal Chim Acta 2018; 1042:86-92. [DOI: 10.1016/j.aca.2018.08.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 07/02/2018] [Accepted: 08/14/2018] [Indexed: 01/02/2023]
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6
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Song X, Fu B, Lan Y, Chen Y, Wei Y, Dong C. Label-free fluorescent aptasensor berberine-based strategy for ultrasensitive detection of Hg 2+ ion. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:301-307. [PMID: 29945113 DOI: 10.1016/j.saa.2018.06.058] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/07/2018] [Accepted: 06/15/2018] [Indexed: 06/08/2023]
Abstract
A label-free fluorescent aptasensing platform was fabricated and a simple and rapid method to detect Hg2+ ion in aqueous solution was put forward by means of berberine and Hg2+ ion-aptamer are as the fluorescence probe and the recognition element, respectively. Various factors including the concentration of berberine, Hg2+ ion and Hg2+ ion-aptamer, pH effect and the reaction time were investigated in detail. Under the optimal experimental conditions, in the sensing system, the fluorescence intensity changes displayed a calibration response for Hg2+ ion in the range of 0.1 μM to 10.0 μM and the detection limit was of 7.7 nM (S/N = 3). The fabricated label-free fluorescence aptasensor is not only conveniently but also effectively applicable used for analysis of Hg2+ ion in blood serum and tap water samples and the recovery range is of 96.0%-105.7%. In brief, this study offers an easy, economical and stable assay system for detecting Hg2+ ion in rough condition.
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Affiliation(s)
- Xiuli Song
- Department of Chemistry, Taiyuan Normal University, Jinzhong 030619, PR China; Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Baochun Fu
- Institute of Horticulture, Shanxi Academy of Agriculture Science, Taiyuan 030031, PR China
| | - Yifeng Lan
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Yanxia Chen
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
| | - Yanli Wei
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China.
| | - Chuan Dong
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, PR China
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7
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Facile and sensitive fluorescence sensing of alkaline phosphatase activity using NMM/G-quadruplex. Talanta 2017; 172:171-175. [DOI: 10.1016/j.talanta.2017.05.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/10/2017] [Accepted: 05/14/2017] [Indexed: 11/21/2022]
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8
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Xie M, Zhang K, Zhu F, Wu H, Zou P. Strategy for the detection of mercury ions by using exonuclease III-aided target recycling. RSC Adv 2017. [DOI: 10.1039/c7ra09288a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new method for the detection of Hg2+ by using an Exo III and G-quadruplex-based strategy was reported here.
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Affiliation(s)
- Minhao Xie
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Kai Zhang
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Feifan Zhu
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Hao Wu
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Pei Zou
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
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9
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Ghosh AC, Schulzke C. Selectively detecting Hg2+ – A “mercury quick test” with bis-(coumarin–dithiolene) niccolate. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.02.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Chen H, Sun H, Zhang X, Sun X, Shi Y, Xu S, Tang Y. A colorimetric and fluorometric dual-modal DNA logic gate based on the response of a cyanine dye supramolecule to G-quadruplexes. NEW J CHEM 2016. [DOI: 10.1039/c5nj02652k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The INHIBIT DNA logic gate with dual-modal outputs based on the response of MTC aggregates to G-quadruplexes.
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Affiliation(s)
- Hongbo Chen
- National Laboratory for Molecular Sciences
- Center for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry Chinese Academy of Sciences
- Beijing
| | - Hongxia Sun
- National Laboratory for Molecular Sciences
- Center for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry Chinese Academy of Sciences
- Beijing
| | - Xiufeng Zhang
- College of Chemistry Engineering
- North China University of Science and Technology
- Tangshan
- China
| | - Xiaoran Sun
- College of Chemistry Engineering
- North China University of Science and Technology
- Tangshan
- China
| | - Yunhua Shi
- National Laboratory for Molecular Sciences
- Center for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry Chinese Academy of Sciences
- Beijing
| | - Shujuan Xu
- National Laboratory for Molecular Sciences
- Center for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry Chinese Academy of Sciences
- Beijing
| | - Yalin Tang
- National Laboratory for Molecular Sciences
- Center for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry Chinese Academy of Sciences
- Beijing
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11
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Zhu J, Zhang L, Dong S, Wang E. How to split a G-quadruplex for DNA detection: new insight into the formation of DNA split G-quadruplex. Chem Sci 2015; 6:4822-4827. [PMID: 29142717 PMCID: PMC5667574 DOI: 10.1039/c5sc01287b] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 05/31/2015] [Indexed: 01/30/2023] Open
Abstract
Here, we get a new insight into the formation of a split G-quadruplex from the viewpoints of the split mode and guanine base number. An unusual result is that the split mode 4 : 8 performed best in six split modes, including the frequently used mode 1 : 3 and 2 : 2 in the split G-quadruplex enhanced fluorescence assay. Circular dichroism spectra verified the conclusion. The application of the split G-quadruplex based assay in DNA detection was performed on the point mutations of the JAK2 V617F and HBB genes. A multi-target analysis method based on a pool of G-segments split from T30695 (GGGTGGGTGGGTGGGT) by the magic "law of 4 : 8" was established.
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Affiliation(s)
- Jinbo Zhu
- State Key Laboratory of Electroanalytical Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China .
- University of Chinese Academy of Sciences , Beijing , 100049 , P. R. China
| | - Libing Zhang
- State Key Laboratory of Electroanalytical Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China .
| | - Shaojun Dong
- State Key Laboratory of Electroanalytical Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China .
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China .
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12
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Li D, Li B, Lee G, Yang SI. Facile Synthesis of Fluorescent Silver Nanoclusters as Simultaneous Detection and Remediation for Hg2+. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10294] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Dan Li
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
| | - Biao Li
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
| | - Goeun Lee
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
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13
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Wu Y, Zhan S, Wang L, Zhou P. Selection of a DNA aptamer for cadmium detection based on cationic polymer mediated aggregation of gold nanoparticles. Analyst 2015; 139:1550-61. [PMID: 24496116 DOI: 10.1039/c3an02117c] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The demand for selection of aptamers against various small chemical molecules has substantially increased in recent years. To incubate and separate target-specific aptamers, the conventional SELEX procedures generally need to immobilize target molecules on a matrix, which may be impotent to screen aptamers toward small molecules without enough sites for immobilization. Herein we chose Cd(II) as a model of a small molecule with less sites, and proposed a novel SELEX strategy of immobilizing ssDNA libraries rather than target molecules on a matrix, for selection of aptamers with high affinity to Cd(II). After eleven rounds of positive and negative selection, twelve T and G-rich of nonrepeating ssDNA sequences were identified, of which the Cd-4 aptamer displayed the highest binding affinity to Cd(II). The secondary structures of these sequences revealed that a stem-loop structure folded by the domain of their 30-random sequence is critical for aptamers to bind targets. Then the interaction between the selected Cd-4 aptamer and Cd(II) was confirmed by CD analysis, and the binding specificity toward other competitive metal ions was also investigated. The dissociation constant (Kd) of Cd-4 aptamer was determined as 34.5 nM for Cd(II). Moreover, the Cd-4 aptamer was considered a recognition element for the colorimetric detection of Cd(II) based on the aggregation of AuNPs by cationic polymer. Through spectroscopic quantitative analysis, Cd(II) in aqueous solution can be detected as low as 4.6 nM. The selected Cd-4 aptamer will offer a new substitute for the detection of Cd(II) or other applications like recovery of cadmium from polluted samples.
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Affiliation(s)
- Yuangen Wu
- Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
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A novel strategy for dual-channel detection of metallothioneins and mercury based on the conformational switching of functional chimera aptamer. J Pharm Biomed Anal 2015; 107:258-64. [DOI: 10.1016/j.jpba.2015.01.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/20/2014] [Accepted: 01/06/2015] [Indexed: 02/02/2023]
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15
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Li H, Fu HW, Zhao T, Kong DM. Simple, PCR-free telomerase activity detection using G-quadruplex–hemin DNAzyme. RSC Adv 2015. [DOI: 10.1039/c4ra14460k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A G-quadruplex DNAzyme-based telomerase activity detection method is developed by utilizing telomerase-triggered generation of short G-rich extension products.
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Affiliation(s)
- Hui Li
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Hai-Wei Fu
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Ting Zhao
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - De-Ming Kong
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
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Acetylcholinesterase-Free Colorimetric Detection of Chlorpyrifos in Fruit Juice Based on the Oxidation Reaction of H2O2 with Chlorpyrifos and ABTS2− Catalyzed by Hemin/G-Quadruplex DNAzyme. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-0042-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Deng W, Xu H, Ding W, Liang H. DNA logic gate based on metallo-toehold strand displacement. PLoS One 2014; 9:e111650. [PMID: 25365381 PMCID: PMC4218789 DOI: 10.1371/journal.pone.0111650] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 09/30/2014] [Indexed: 01/05/2023] Open
Abstract
DNA is increasingly being used as an ideal material for the construction of nanoscale structures, circuits, and machines. Toehold-mediated DNA strand displacement reactions play a very important role in these enzyme-free constructions. In this study, the concept of metallo-toehold was utilized to further develop a mechanism for strand displacement driven by Ag+ ions, in which the intercalation of cytosine-cytosine mismatched base pairs on the toeholds provides additional control by varying of the concentration of Ag+ ions. The characteristics of displacement reaction in response to different concentration of Ag+ ions are investigated by fluorescence spectral and non-denaturing polyacrylamide gel electrophoresis. The reaction can successfully occur when the concentration of Ag+ ions is suitabe; excess Ag+ ions block the reaction. Furthermore, the displacement reaction can be tuned and controlled most efficiently under the condition of two C:C mismatched base pairs placed on the six-nt toehold. Based on our research, a mechanism was developed to construct Boolean logic gate AND and OR by employing strand displacement reaction as a tool, Ag+ and Hg2+ as input.
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Affiliation(s)
- Wei Deng
- CAS Key Laboratory of Soft Matter Chemistry, Department of polymer science and engineering, University of Science and Technologyof China, Hefei, Anhui, P. R. China
| | - Huaguo Xu
- CAS Key Laboratory of Soft Matter Chemistry, Department of polymer science and engineering, University of Science and Technologyof China, Hefei, Anhui, P. R. China
| | - Wei Ding
- CAS Key Laboratory of Soft Matter Chemistry, Department of polymer science and engineering, University of Science and Technologyof China, Hefei, Anhui, P. R. China
| | - Haojun Liang
- CAS Key Laboratory of Soft Matter Chemistry, Department of polymer science and engineering, University of Science and Technologyof China, Hefei, Anhui, P. R. China
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, P. R. China
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18
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Sensor Design Based on Structure Adjustment in Loops of G-quadruplex. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1016/s1872-2040(14)60772-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Bagheri Z, Ranjbar B, Latifi H, Zibaii MI, Moghadam TT, Azizi A. Spectral properties and thermal stability of AS1411 G-quadruplex. Int J Biol Macromol 2014; 72:806-11. [PMID: 25251241 DOI: 10.1016/j.ijbiomac.2014.09.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Revised: 09/13/2014] [Accepted: 09/15/2014] [Indexed: 12/12/2022]
Abstract
G-quadruplexes are supramolecular structures of G-rich nucleic acid, formed by non-canonical base pairing in the presence of specific environmental inducers. These structures have been vastly considered in diagnostic and therapeutic applications. However, detailed information on structure, optical properties and thermal stability of G-quadruplex potent oligonucleotides is scarce. Herein, optical properties and thermodynamic stability of AS1411 quadruplex is reported for various concentrations of potassium and lead ions. Circular dichroism showed that AS1411 ss-DNA folds into parallel conformation in the presence of metal ions and molecular crowding condition. UV-vis spectroscopy indicated formation of quadruplex and fluorescent spectroscopy revealed intercalation of PicoGreen in its structure, with enhancement of emission intensity upon increment of metal ion concentration. This investigation also proposes high-throughput and reliable analysis of AS1411 quadruplex's thermal stability by real-time PCR technique, which can be further applied for other quadruplex structures.
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Affiliation(s)
- Zeinab Bagheri
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Bijan Ranjbar
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran; Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Hamid Latifi
- Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran, Iran.
| | | | - Tahereh Tohidi Moghadam
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Azade Azizi
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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20
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Yan Z, Yuen MF, Hu L, Sun P, Lee CS. Advances for the colorimetric detection of Hg2+in aqueous solution. RSC Adv 2014. [DOI: 10.1039/c4ra07930b] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Zhang K, Tan T, Fu JJ, Zheng T, Zhu JJ. A novel aptamer-based competition strategy for ultrasensitive electrochemical detection of leukemia cells. Analyst 2014; 138:6323-30. [PMID: 23978949 DOI: 10.1039/c3an01255g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A robust, nanobiotechnology-based electrochemical cytosensing platform for the detection of acute leukemia cells was developed with high sensitivity, selectivity, acceptable rapidity and excellent extensibility. It utilized the competitive binding of cell-specific aptamers to acute leukemia cells and subsequent voltammetric quantification of the metal signature. Greatly enhanced sensitivity was achieved with dual signal amplification by using Fe3O4 magnetic nanoparticles (MNPs) as carriers to load a large amount of gold nanoparticles (AuNPs) and AuNP-catalyzed silver deposition. The proposed competitive cytosensor showed high sensitivity with a detection limit down to 10 cells. This simple and low-cost electrochemical cytosensing approach offers great promise to extend its application to early detection of human leukemia and possibly to other cancer cells.
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Affiliation(s)
- Kui Zhang
- The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing University, Nanjing, 210008, P. R. China
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An Electrochemiluminescence Biosensor for Determination of Pb2+ Based on G-Quadruplex of Aptamer Probe. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1016/s1872-2040(14)60750-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Abstract
Increasing interest in detecting metal ions in many chemical and biomedical fields has created demands for developing sensors and imaging agents for metal ions with high sensitivity and selectivity. This review covers recent progress in DNA-based sensors and imaging agents for metal ions. Through both combinatorial selection and rational design, a number of metal-ion-dependent DNAzymes and metal-ion-binding DNA structures that can selectively recognize specific metal ions have been obtained. By attachment of these DNA molecules with signal reporters such as fluorophores, chromophores, electrochemical tags, and Raman tags, a number of DNA-based sensors for both diamagnetic and paramagnetic metal ions have been developed for fluorescent, colorimetric, electrochemical, and surface Raman detection. These sensors are highly sensitive (with a detection limit down to 11 ppt) and selective (with selectivity up to millions-fold) toward specific metal ions. In addition, through further development to simplify the operation, such as the use of "dipstick tests", portable fluorometers, computer-readable disks, and widely available glucose meters, these sensors have been applied for on-site and real-time environmental monitoring and point-of-care medical diagnostics. The use of these sensors for in situ cellular imaging has also been reported. The generality of the combinatorial selection to obtain DNAzymes for almost any metal ion in any oxidation state and the ease of modification of the DNA with different signal reporters make DNA an emerging and promising class of molecules for metal-ion sensing and imaging in many fields of applications.
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Affiliation(s)
- Yu Xiang
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Fax: 217-244-3186; Tel: 217-333-2619
| | - Yi Lu
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Fax: 217-244-3186; Tel: 217-333-2619
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24
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Ding W, Xu M, Zhu H, Liang H. Mechanism of the hairpin folding transformation of thymine-cytosine-rich oligonucleotides induced by Hg(II) and Ag(I) ions. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2013; 36:101. [PMID: 24045985 DOI: 10.1140/epje/i2013-13101-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 07/10/2013] [Accepted: 08/12/2013] [Indexed: 06/02/2023]
Abstract
The metal-induced folding of thymine-cytosine-rich oligonucleotides into hairpin-like structures was characterised by isothermal titration calorimetry, secondary structure analysis, equilibrium titrations, and fluorescence study. We find that designed thymine-cytosine-rich oligonucleotides can specifically bind with Hg(II) or Ag(I) ions to generate metal-mediated base pairs in a hairpin-like structure from a random coil structure. Isothermal titration calorimetry experiments were performed to reveal the detail of the whole binding process. The thermodynamic result exhibits two possible pathways of significant change upon the addition of Hg(II) ions. Furthermore, this transformation can be enhanced by the presence of Ag(I) ions. The fluorescence decreases through fluorescence resonance energy transfer (FRET) between the fluorophore and quencher confirms the process of formation of the hairpin-like structure. The analysis of optical titration data demonstrates that the saturated binding stoichiometries are 12:1 and 4:1 for Hg(II) and Ag(I) ions, respectively. Our result provides a promising strategy for the investigation of the mechanism of structural transformation of oligonucleotides influenced by metal-mediated base pairs, which may eventually lead to progress in constructing a metal-triggered DNA origami system and metal-containing DNA nanotechnology.
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Affiliation(s)
- Wei Ding
- CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Polymer Science and Engineering, University of Science and Technology of China, 230026, Hefei, Anhui, P. R. China
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25
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A novel label-free optical cysteine sensor based on the competitive oxidation reaction catalyzed by G-quadruplex halves. Biosens Bioelectron 2013; 43:268-73. [DOI: 10.1016/j.bios.2012.12.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 12/02/2012] [Accepted: 12/17/2012] [Indexed: 01/14/2023]
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26
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Hai H, Yang F, Li J. Electrochemiluminescence sensor using quantum dots based on a G-quadruplex aptamer for the detection of Pb2+. RSC Adv 2013. [DOI: 10.1039/c3ra41616j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Roembke BT, Wang J, Nakayama S, Zhou J, Sintim HO. Octameric G8 c-di-GMP is an efficient peroxidase and this suggests that an open G-tetrad site can effectively enhance hemin peroxidation reactions. RSC Adv 2013. [DOI: 10.1039/c3ra23308a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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28
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Electrocatalytic assay of mercury(II) ions using a bifunctional oligonucleotide signal probe. Anal Chim Acta 2013; 762:47-53. [DOI: 10.1016/j.aca.2012.12.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 11/27/2012] [Accepted: 12/04/2012] [Indexed: 11/23/2022]
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29
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Ding W, Deng W, Zhu H, Liang H. Metallo-toeholds: controlling DNA strand displacement driven by Hg(ii) ions. Chem Commun (Camb) 2013; 49:9953-5. [DOI: 10.1039/c3cc45373a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Wang CI, Huang CC, Lin YW, Chen WT, Chang HT. Catalytic gold nanoparticles for fluorescent detection of mercury(II) and lead(II) ions. Anal Chim Acta 2012; 745:124-30. [DOI: 10.1016/j.aca.2012.07.041] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2012] [Revised: 06/25/2012] [Accepted: 07/27/2012] [Indexed: 10/28/2022]
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31
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Shao C, Lu N, Sun D. A G‐Quadruplex/Hemin Complex with Switchable Peroxidase Activity by DNA Hybridization. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201200360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Congying Shao
- School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
| | - Na Lu
- Laboratory of Physical Biology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Dengming Sun
- School of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, China
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Wei TY, Chang HY, Lee YF, Hunga YL, Huang CC. Selective Tellurium Nanowire-based Sensors for Mercury(II) in Aqueous Solution. J CHIN CHEM SOC-TAIP 2011. [DOI: 10.1002/jccs.201190115] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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Zhu D, Luo J, Rao X, Zhang J, Cheng G, He P, Fang Y. A novel optical thrombin aptasensor based on magnetic nanoparticles and split DNAzyme. Anal Chim Acta 2011; 711:91-6. [PMID: 22152801 DOI: 10.1016/j.aca.2011.10.053] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Revised: 10/13/2011] [Accepted: 10/19/2011] [Indexed: 01/03/2023]
Abstract
In this paper, we report a novel and sensitive optical sensing protocol for thrombin detection based on magnetic nanoparticles (MNPs) and thrombin aptamer, employing split HRP-mimicking DNAzyme halves as its sensing element, which can catalyze the H(2)O(2)-mediated oxidation of the colorless ABTS into a blue-green product. A single nucleotide containing the recognition element and sensing element is utilized in our protocol. The specific recognition of thrombin and its aptamer leads to the structure deformation of the DNA strands and causes the split of the DNAzyme halves. Therefore, the decrease of absorption spectra can be recorded by the UV-visible Spectrophotometer. DNA-coated MNPs are utilized to separate the interferential materials from the analyst, thus making this assay can be applied in the detection of thrombin in complex samples, such as human plasma. This original, sensitive and cost-effective assay showed favorable recognition for thrombin. The absorbance signals with the concentration of thrombin over a range from 0.5 to 20 nM and the detection limit of thrombin was 0.5 nM. The controlled experiments showed that thrombin signal was not interfered in the presence of other co-existence proteins.
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Affiliation(s)
- Dan Zhu
- Department of Chemistry, East China Normal University, Shanghai, PR China
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35
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Abstract
Aptamers are useful for allosteric regulation because they are nucleic acid-based structures in which ligand binding induces conformational changes that may alter the function of a connected oligonucleotide at a distant site. Through this approach, a specific input is efficiently converted into an altered output. This property makes these biomolecules ideally suited to function as sensors or switches in biochemical assays or inside living cells. The ability to select oligonucleotide-based recognition elements in vitro in combination with the availability of nucleic acids with enzymatic activity has led to the development of a wide range of engineered allosteric aptasensors and aptazymes. Here, we discuss recent progress in the screening, design and diversity of these conformational switching oligonucleotides. We cover their application in vitro and for regulating gene expression in both prokaryotes and eukaryotes.
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Affiliation(s)
- Jan L Vinkenborg
- Life & Medical Sciences Institute, Chemical Biology & Medicinal Chemistry Unit, Laboratory of Chemical Biology, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
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36
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Zhang Y, Li B, Jin Y. Label-free fluorescent detection of thrombin using G-quadruplex-based DNAzyme as sensing platform. Analyst 2011; 136:3268-73. [PMID: 21725571 DOI: 10.1039/c1an00002k] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report herein a label-free and sensitive fluorescent method for detection of thrombin using a G-quadruplex-based DNAzyme as the sensing platform. The thrombin-binding aptamer (TBA) is able to bind hemin to form the G-quadruplex-based DNAzyme, and thrombin can significantly enhance the activity of the G-quadruplex-based DNAzyme. The G-quadruplex-based DNAzyme is found to effectively catalyze the H(2)O(2)-mediated oxidation of thiamine, giving rise to fluorescence emission. This allows us to utilize the H(2)O(2)-thiamine fluorescent system for the quantitative analysis of thrombin. The assay shows a linear toward thrombin concentration in the range of 0.01-0.12 nM. The present limit of detection for thrombin is 1 pM, and the sensitivity for analyzing thrombin is improved by about 10,000-fold as compared with the reported colorimetric counterpart. The work also demonstrates that thiamine is an excellent substrate for the fluorescence assay using the G-quadruplex-based DNAzyme as the sensing platform.
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Affiliation(s)
- Yuanfu Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an, 710062, PR China
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37
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Jia SM, Liu XF, Li P, Kong DM, Shen HX. G-quadruplex DNAzyme-based Hg2+ and cysteine sensors utilizing Hg2+-mediated oligonucleotide switching. Biosens Bioelectron 2011; 27:148-52. [PMID: 21775125 DOI: 10.1016/j.bios.2011.06.032] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 06/10/2011] [Accepted: 06/26/2011] [Indexed: 11/29/2022]
Abstract
A simple and sensitive colorimetric Hg(2+) detection method is reported, based on the Hg(2+)-mediated structural switch of an unlabeled oligonucleotide strand. In the absence of Hg(2+), the oligonucleotide strand forms a stem-loop. A G-rich sequence in the strand is partially caged in the stem-loop structure and cannot fold into a G-quadruplex. In the presence of Hg(2+), T-Hg(2+)-T coordination chemistry leads to the formation of another stem-loop structure and the release of the G-rich sequence. The released sequence folds into a G-quadruplex, which binds hemin to form catalytically active G-quadruplex DNAzymes. This is detected as an absorbance increase in a H(2)O(2)-2,2'-azinobis(3-ethylbenzothiozoline)-6-sulfonic acid (ABTS) reaction system using UV-vis absorption spectroscopy. This simple colorimetric sensor can detect aqueous Hg(2+) at concentrations as low as 9.2 nM with high selectivity. Based on the strong binding interaction between Hg(2+) and the sulfur-containing amino acid cysteine (Cys), and the competition between Cys and a oligonucleotide for Hg(2+), the proposed Hg(2+)-sensing system can be further exploited as a Cys-sensing method. The method has a detection limit for Cys of 19 nM.
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Affiliation(s)
- Shu-Min Jia
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin, PR China
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38
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Wu Y, Zhan S, Xu L, Shi W, Xi T, Zhan X, Zhou P. A simple and label-free sensor for mercury(II) detection in aqueous solution by malachite green based on a resonance scattering spectral assay. Chem Commun (Camb) 2011; 47:6027-9. [PMID: 21559531 DOI: 10.1039/c1cc10563a] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mercury ions (Hg(2+)) can specifically interact with the thymine-rich Hg(2+) aptamer and malachite green (MG) to form the Hg(2+) aptamer-MG-Hg(2+) complex, inducing the increase of resonance scattering (RS) intensity at 611 nm, which enables the label-free detection of Hg(2+) in aqueous solution with high selectivity and a detection limit of 1.7 nM.
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Affiliation(s)
- Yuangen Wu
- Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Shanghai Jiao Tong University, Shanghai, 200240, PR China
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39
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A simple and sensitive fluorescent sensing platform for Hg²+ ions assay based on G-quenching. Talanta 2011; 85:713-7. [PMID: 21645763 DOI: 10.1016/j.talanta.2011.04.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2011] [Revised: 04/19/2011] [Accepted: 04/21/2011] [Indexed: 11/22/2022]
Abstract
In this work, a novel fluorescence biosensor was demonstrated for detection of Hg(2+) ions with relatively high selectivity and sensitivity. The sensing scheme was based on G-quenching induced by Hg(2+) ions. In the presence of Hg(2+) ions, the single-stranded signal probe which has carboxylfluorescein (FAM) and guanine segment at its 5' and 3' ends, respectively, folded into duplex-like structure via the Hg(2+)-mediated coordination of T-Hg(2+)-T base pairs. It brought guannine segment close to the dye and caused a remarkable decrease of fluorescence signal. The sensor showed a sensitive response to Hg(2+) ions in a concentration range from 0.5 to 10 μM, and a detection limit of 0.5 nM was given. This homogeneous system required only a single-labeled oligonucleotide, operated by concise procedures, and possessed comparable sensitivity as previous approaches. Furthermore, the sensor exhibits a great perspective for future practical applications.
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40
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Wu S, Duan N, Wang Z, Wang H. Aptamer-functionalized magnetic nanoparticle-based bioassay for the detection of ochratoxin A using upconversion nanoparticles as labels. Analyst 2011; 136:2306-14. [PMID: 21479303 DOI: 10.1039/c0an00735h] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A sensitive luminescent bioassay for the detection of ochratoxin A (OTA), a small molecular mycotoxin, was developed using aptamer-conjugated magnetic nanoparticles (MNPs) as the recognition and concentration element and upconversion nanoparticles (UCNPs) as highly sensitive labels. The bioassay system was fabricated by immobilizing aptamer DNA 1 sequence onto the surface of Fe(3)O(4) MNPs, which were implemented to capture and concentrate OTA from bulk samples. The aptamer DNA 1 sequence then hybridized with UCNPs modified with DNA 2 sequence, which could dissociate from DNA 1 and result in a decreased luminescent signal when aptamer DNA 1 recognized and bound to target OTA. Under the optimal conditions, the decreased luminescent intensity (ΔI) is proportional to the concentration of OTA in the range of 1 × 10(-13) to 1 × 10(-9) g mL(-1) with a detection limit of 1 × 10(-13) g mL(-1). The proposed method then was successfully applied to measure OTA in naturally contaminated maize samples and validated by a commercially available enzyme-linked immunosorbent assay (ELISA) method. Benefiting from the magnetic separation and concentration effect of MNPs, the high sensitivity of UCNPs, as well as the selectivity and stability of the aptamer, the present upconversion luminescent bioassay offers a promising approach for the screening of small molecular mycotoxins because it is simple, rapid, highly sensitive, specific, does not require sample pre-concentration and lacks interference from autofluorescence of other biomolecules.
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Affiliation(s)
- Shijia Wu
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
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41
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Huang PJJ, Liu J. Immobilization of DNA on Magnetic Microparticles for Mercury Enrichment and Detection with Flow Cytometry. Chemistry 2011; 17:5004-10. [DOI: 10.1002/chem.201002934] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 11/25/2010] [Indexed: 02/02/2023]
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42
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Joseph KA, Dave N, Liu J. Electrostatically directed visual fluorescence response of DNA-functionalized monolithic hydrogels for highly sensitive Hg²+ detection. ACS APPLIED MATERIALS & INTERFACES 2011; 3:733-739. [PMID: 21323356 DOI: 10.1021/am101068c] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Hydrogels are cross-linked hydrophilic polymer networks with low optical background and high loading capacity for immobilization of biomolecules. Importantly, the property of hydrogel can be precisely controlled by changing the monomer composition. This feature, however, has not been investigated in the rational design of hydrogel-based optical sensors. We herein explore electrostatic interactions between an immobilized mercury binding DNA, a DNA staining dye (SYBR Green I), and the hydrogel backbone. A thymine-rich DNA was covalently functionalized within monolithic hydrogels containing a positive, neutral, or negative backbone. These hydrogels can be used as sensors for mercury detection since the DNA can selectively bind Hg(2+) between thymine bases inducing a hairpin structure. SYBR Green I can then bind to the hairpin to emit green fluorescence. For the neutral or negatively charged gels, addition of the dye in the absence of Hg(2+) resulted in intense yellow background fluorescence, which was attributed to SYBR Green I binding to the unfolded DNA. We found that, by introducing 20% positively charged allylamine monomer, the background fluorescence was significantly reduced. This was attributed to the repulsion between positively charged SYBR Green I by the gel matrix as well as the strong binding between the DNA and the gel backbone. The signal-to-background ratio and detection limit was, respectively, improved by 6- and 9-fold using the cationic gel instead of neutral polyacrylamide gel. This study helps understand the electrostatic interaction within hydrogels, showing that hydrogels can not only serve as a high capacity matrix for sensor immobilization but also can actively influence the interaction between involved molecules.
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Affiliation(s)
- Kevin A Joseph
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada
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43
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Scully CC, Lau YH, Jensen P, Rutledge PJ. Synthesis, electrochemistry and metal binding properties of monosubstituted ferrocenoyl peptides with thioether-containing sidechains. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.09.056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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44
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Tang CX, Bu NN, He XW, Yin XB. Functional nucleic acid-based electrochemiluminescent biosensor for interaction study and detection of Ag+ ions and cysteine. Chem Commun (Camb) 2011; 47:12304-6. [DOI: 10.1039/c1cc15323d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Liu H, Yang L, Ma H, Qi Z, Liu J. Molecular sensitivity of DNA–Ag–PATP hybrid on optical activity for ultratrace mercury analysis. Chem Commun (Camb) 2011; 47:9360-2. [DOI: 10.1039/c1cc13336e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Zhang XB, Kong RM, Lu Y. Metal ion sensors based on DNAzymes and related DNA molecules. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2011; 4:105-28. [PMID: 21370984 PMCID: PMC3119750 DOI: 10.1146/annurev.anchem.111808.073617] [Citation(s) in RCA: 241] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Metal ion sensors are an important yet challenging field in analytical chemistry. Despite much effort, only a limited number of metal ion sensors are available for practical use because sensor design is often a trial-and-error-dependent process. DNAzyme-based sensors, in contrast, can be developed through a systematic selection that is generalizable for a wide range of metal ions. Here, we summarize recent progress in the design of DNAzyme-based fluorescent, colorimetric, and electrochemical sensors for metal ions, such as Pb(2+), Cu(2+), Hg(2+), and UO(2)(2+). In addition, we also describe metal ion sensors based on related DNA molecules, including T-T or C-C mismatches and G-quadruplexes.
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Affiliation(s)
- Xiao-Bing Zhang
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Rong-Mei Kong
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yi Lu
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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47
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Li B, Dong S, Wang E. Homogeneous analysis: label-free and substrate-free aptasensors. Chem Asian J 2010; 5:1262-72. [PMID: 20408164 DOI: 10.1002/asia.200900660] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this Focus Review, we introduce a kind of "label-free" and "substrate-free" (LFSF) aptasensor that carries out the whole sensing process in a homogeneous solution. This means that commonly used covalent label; separation, and immobilization steps in biosensors are successfully avoided, which simplifies the sensing operations to the greatest degree. After brief description about the advantages of aptamers and "LFSF" aptasensors, the main content of the review is divided into fluorescent aptasenors, calorimetric aptasensors, and hemin-aptamer-DNAzyme "LFSF" aptasensors, which are three most widely developed sensing systems in this field. It is hoped that this review can provide an overall scene about how aptamers function as ideal recognition elements in smart analysis.
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Affiliation(s)
- Bingling Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022 P. R. China
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48
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Dave N, Chan MY, Huang PJJ, Smith BD, Liu J. Regenerable DNA-Functionalized Hydrogels for Ultrasensitive, Instrument-Free Mercury(II) Detection and Removal in Water. J Am Chem Soc 2010; 132:12668-73. [PMID: 20726570 DOI: 10.1021/ja106098j] [Citation(s) in RCA: 335] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Neeshma Dave
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Michelle Y. Chan
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Po-Jung Jimmy Huang
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Brendan D. Smith
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
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49
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Wei H, Wang Z, Yang L, Tian S, Hou C, Lu Y. Lysozyme-stabilized gold fluorescent cluster: Synthesis and application as Hg(2+) sensor. Analyst 2010; 135:1406-10. [PMID: 20411205 PMCID: PMC3071852 DOI: 10.1039/c0an00046a] [Citation(s) in RCA: 281] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Highly fluorescent gold clusters have been synthesized in basic aqueous solution by using lysozyme as reducing and stabilizing agents. The lysozyme-stabilized gold fluorescent clusters (LsGFC) have an average size of 1 nm and emission approximately 657 nm. The fluorescence could be specifically quenched by Hg(2+), so the LsGFC can be used as a sensor for sensitive and selective Hg(2+) detection with a detection limit of 10 nM.
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Affiliation(s)
- Hui Wei
- Department of Chemistry, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA; Fax: (+1) 217-244-3186; Tel: (+1) 217-333-2619
| | - Zidong Wang
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Limin Yang
- Department of Chemistry, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA; Fax: (+1) 217-244-3186; Tel: (+1) 217-333-2619
- College of Bioengineering, Chongqing University, Sha Ping Ba Street 174, Chongqing, 400044, China
| | - Shiliang Tian
- Department of Chemistry, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA; Fax: (+1) 217-244-3186; Tel: (+1) 217-333-2619
| | - Changjun Hou
- College of Bioengineering, Chongqing University, Sha Ping Ba Street 174, Chongqing, 400044, China
| | - Yi Lu
- Department of Chemistry, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA; Fax: (+1) 217-244-3186; Tel: (+1) 217-333-2619
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA
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Kong DM, Cai LL, Shen HX. Quantitative detection of Ag(+) and cysteine using G-quadruplex-hemin DNAzymes. Analyst 2010; 135:1253-8. [PMID: 20390219 DOI: 10.1039/b925168e] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly sensitive and selective Ag(+) detection method was developed based on the Ag(+)-mediated formation of G-quadruplex-hemin DNAzymes. In this method, two unlabelled oligonucleotides with different lengths are used. In the absence of Ag(+), the two oligonucleotides hybridize to each other to form an intermolecular duplex. The addition of Ag(+) can disrupt the intermolecular duplex and promote a part of the sequence of the longer oligonucleotide to fold into an intramolecular duplex, in which cytosine-cytosine (C-C) mismatches are stabilized by C-Ag(+)-C base pairs. As a result, the G-rich sequence of the same oligonucleotide can fold into a G-quadruplex, which is able to bind hemin to form a catalytically active G-quadruplex-hemin DNAzyme. This can be reflected by an absorbance increase when monitored in the H(2)O(2)-ABTS (2,2'-azinobis(3-ethylbenzothiozoline)-6-sulfonic acid) reaction system by using UV-vis absorption spectroscopy. This 'turn-on' process allows the detection of aqueous Ag(+) at concentrations as low as 20 nM using a simple colorimetric technique. Considering that Cysteine (Cys) is a strong binder of Ag(+), the presence of Cys may disrupt the C-Ag(+)-C base pairs in the intramolecular duplex, resulting in the reformation of the intermolecular duplex and the decrease of the catalytic activity of the sensing system. Therefore, the Ag(+)-sensing system can be further developed as a Cys-sensing system. This method allows the detection of Cys with a detection limit of 25 nM. With the development of the studies on DNA-metal base pairs, this Ag(+)-sensing method can be easily extended to the analysis of other metal ions.
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Affiliation(s)
- De-Ming Kong
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Nankai University, Tianjin, 300071, People's Republic of China.
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