1
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Bidar N, Amini M, Oroojalian F, Baradaran B, Hosseini SS, Shahbazi MA, Hashemzaei M, Mokhtarzadeh A, Hamblin MR, de la Guardia M. Molecular beacon strategies for sensing purpose. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2020.116143] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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2
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Ouyang T, Liu Z, Han Z, Ge Q. MicroRNA Detection Specificity: Recent Advances and Future Perspective. Anal Chem 2019; 91:3179-3186. [DOI: 10.1021/acs.analchem.8b05909] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tinglan Ouyang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Zhiyu Liu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Zhiyi Han
- Department of Liver Diseases, Shenzhen Traditional Chinese Medicine Hospital, Shenzhen 518033, China
| | - Qinyu Ge
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
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3
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Guo J, Gao M, Song Y, Lin L, Zhao K, Tian T, Liu D, Zhu Z, Yang CJ. An Allosteric-Probe for Detection of Alkaline Phosphatase Activity and Its Application in Immunoassay. Front Chem 2018; 6:618. [PMID: 30619826 PMCID: PMC6299030 DOI: 10.3389/fchem.2018.00618] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 11/30/2018] [Indexed: 01/22/2023] Open
Abstract
A fluorescence strategy for alkaline phosphatase (ALP) assay in complicated samples with high sensitivity and strong stability is developed based on an allosteric probe (AP). This probe consists of two DNA strands, a streptavidin (SA) aptamer labeled by fluorophore and its totally complementary DNA (cDNA) with a phosphate group on the 5′ end. Upon ALP introduction, the phosphate group on the cDNA is hydrolyzed, leaving the unhydrolyzed cDNA sequence for lambda exonuclease (λ exo) digestion and releasing SA aptamer for binding to SA beads, which results in fluorescence enhancement of SA beads that can be detected by flow cytometry or microscopy. We have achieved a detection limit of 0.012 U/mL with a detection range of 0.02~0.15 U/mL in buffer and human serum. These figures of merit are better than or comparable to those of other methods. Because the fluorescence signal is localized on the beads, they can be separated to remove fluorescence background from complicated biological systems. Notably, the new strategy not only applies to ALP detection with simple design, easy operation, high sensitivity, and good compatibility in complex solution, but also can be utilized in ALP-linked immunosorbent assays for the detection of a wide range of targets.
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Affiliation(s)
- Jingjing Guo
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Mingxuan Gao
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Yanling Song
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Li Lin
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Kaifeng Zhao
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Tian Tian
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Dan Liu
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Zhi Zhu
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Chaoyong James Yang
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.,Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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4
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Yan T, Zhu L, Ju H, Lei J. DNA-Walker-Induced Allosteric Switch for Tandem Signal Amplification with Palladium Nanoparticles/Metal-Organic Framework Tags in Electrochemical Biosensing. Anal Chem 2018; 90:14493-14499. [PMID: 30472833 DOI: 10.1021/acs.analchem.8b04338] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A DNA walker as a new molecular machine can walk on defined tracks to directly generate signal indicators in biosensing and biomedical applications. In this work, a tandem signal amplification strategy was developed on the basis of the DNA-walker-induced conformation switch for bridging palladium nanoparticles/metal-organic framework tags in ultrasensitive electrochemical DNA biosensing. The signal tags were synthesized by in situ reduction of Pd nanocrystals on porphyrinic metal-organic frameworks (PCN-224), followed by conjugation with streptavidin (SA). The as-prepared Pd/PCN-224-SA tag could electrocatalyze the oxidation of NaBH4 with high efficiency for signal readout. The presence of target DNA released swing arms that were each silenced by a blocker, and then the activated swing arms could hybridize with hairpin DNA. The movement of swing arms was powered by enzymatic cleavage of conjugated oligonucleotides, inducing the allosteric switch from hairpin to SA aptamer. Therefore, Pd/PCN-224-SA tags were brought onto the electrode surface via SA-aptamer biorecognition to generate the enhanced electrochemical signal. The DNA walker-based electrochemical biosensor demonstrated good performance such as 6 orders of magnitude linear range, femtomolar detection limit, and single mismatch differentiation ability. Moreover, the feasibility of the biosensor was identified in serum matrixes. The tandem signal amplification of metal-organic frameworks and DNA walkers provided a new avenue in trace electrochemical biosensing.
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Affiliation(s)
- Tingting Yan
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Longyi Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Jianping Lei
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
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5
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Zhu L, Chen D, Lu X, Qi Y, He P, Liu C, Li Z. An ultrasensitive flow cytometric immunoassay based on bead surface-initiated template-free DNA extension. Chem Sci 2018; 9:6605-6613. [PMID: 30310592 PMCID: PMC6115634 DOI: 10.1039/c8sc02752h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 07/20/2018] [Indexed: 12/14/2022] Open
Abstract
An ultrasensitive flow cytometric immunoassay (TdT-FCI) is developed based on bead surface-initiated template-free DNA extension.
Proteins lack the duplication mechanism like nucleic acids, so the connection of immunoassays with effective nucleic acid amplification techniques has become a powerful way for the detection of trace protein biomarkers in biological fluids. However, such immunoassays generally suffer from rather stringent DNA sequence design and complicated operations. Herein, we propose a simple but highly sensitive flow cytometric immunoassay (FCI) by employing on-bead terminal deoxynucleotidyl transferase (TdT)-initiated template-free DNA extension as an effective signal amplification pathway (TdT-FCI), and gold nanoparticles (AuNPs) co-functionalized with both the detection antibody and a 3′-OH oligonucleotide (ODN) as the transducer to bridge the immunoassay and subsequent TdT-mediated DNA amplification. The target antigen can sandwich with the capture antibody immobilized on the magnetic beads (MBs) and the detection antibody on the AuNPs to bring a lot of ODNs onto the surface of MBs. Each ODN on the MBs can be effectively elongated by TdT in a template-free manner to produce a long poly(T) tail, which will then bind to many 6-carboxyfluorescein (FAM)-labeled poly(A)25. Since each AuNP can carry multiple ODNs and each extended ODN can ultimately capture numerous FAM-poly(A)25, efficiently amplified fluorophore accumulation on the MBs can be achieved. The fluorescent MBs can be individually interrogated with a flow cytometer and thus quantitative analysis of the target antigen can be realized. Coupled with the powerful flow cytometry analysis, the simple but efficient TdT-based signal amplification mechanism has pushed the detection limit of prostate specific antigen (PSA) down to a low level of 0.5 pg mL–1. Furthermore, based on an elegant bead size-encoding principle, we have further advanced the TdT-FCI for multiplexed antigen detection in a single reaction. Sharing the unique merits of simple design and operation, efficient signal amplification, powerful signal readout and the capability for multiplexed analysis, this TdT-FCI provides a versatile tool for detecting trace antigen biomarkers towards clinical diagnosis as well as prognosis.
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Affiliation(s)
- Liping Zhu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , Shaanxi Province , P. R. China .
| | - Desheng Chen
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , Shaanxi Province , P. R. China .
| | - Xiaohui Lu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , Shaanxi Province , P. R. China .
| | - Yan Qi
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , Shaanxi Province , P. R. China .
| | - Pan He
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , Shaanxi Province , P. R. China .
| | - Chenghui Liu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , Shaanxi Province , P. R. China .
| | - Zhengping Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province , Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , Shaanxi Province , P. R. China .
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6
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Rossetti M, Porchetta A. Allosterically regulated DNA-based switches: From design to bioanalytical applications. Anal Chim Acta 2018; 1012:30-41. [PMID: 29475471 DOI: 10.1016/j.aca.2017.12.046] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 12/10/2017] [Accepted: 12/28/2017] [Indexed: 02/07/2023]
Abstract
DNA-based switches are structure-switching biomolecules widely employed in different bioanalytical applications. Of particular interest are DNA-based switches whose activity is regulated through the use of allostery. Allostery is a naturally occurring mechanism in which ligand binding induces the modulation and fine control of a connected biomolecule function as a consequence of changes in concentration of the effector. Through this general mechanism, many different allosteric DNA-based switches able to respond in a highly controlled way at the presence of a specific molecular effector have been engineered. Here, we discuss how to design allosterically regulated DNA-based switches and their applications in the field of molecular sensing, diagnostic and drug release.
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Affiliation(s)
- Marianna Rossetti
- Chemistry Department, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Alessandro Porchetta
- Chemistry Department, University of Rome, Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy.
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7
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Gao M, Guo J, Song Y, Zhu Z, Yang CJ. Detection of T4 Polynucleotide Kinase via Allosteric Aptamer Probe Platform. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38356-38363. [PMID: 29027787 DOI: 10.1021/acsami.7b14185] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
As a vital enzyme in DNA phosphorylation and restoration, T4 polynucleotide kinase (T4 PNK) has aroused great interest in recent years. Therefore, numerous strategies have been established for highly sensitive detection of T4 PNK based on diverse signal amplification techniques. However, they often need sophisticated design, a variety of auxiliary reagents and enzymes, or cumbersome manipulations. We have designed a new kind of allosteric aptamer probe (AAP) consisting of streptavidin (SA) aptamer and the complementary DNA (cDNA) for simple detection of T4 PNK without signal amplification and with minimized interference in complex biological samples. When the 5'-terminus of the cDNA is phosphorylated by T4 PNK, the cDNA is degraded by lambda exonuclease to release the fluorescein amidite (FAM)-labeled SA aptamer, which subsequently binds to streptavidin beads. The enhancement of the fluorescence signal on SA beads can be detected precisely and easily by a microscope or flow cytometer. Our method performs well in complex biological samples as a result of the enrichment of the signaling molecules on beads, as well as simple manipulations to discard the background interference and nonbinding molecules. Without signal amplification techniques, our AAP method not only avoids complicated manipulations but also decreases the time required. With the advantages of ease of operation, reliability, and robustness for T4 PNK detection in buffer as well as real biological samples, the AAP has great potential for clinical diagnostics, inhibitor screening, and drug discovery.
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Affiliation(s)
- Mingxuan Gao
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Jingjing Guo
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Yanling Song
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
- The Key Lab of Analysis and Detection Technology for Food Safety of MOE, State Key Laboratory of Photocatalysis on Energy and Environment, College of Biological Science and Engineering, Fuzhou University , Fuzhou 350116, China
| | - Zhi Zhu
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
| | - Chaoyong James Yang
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Collaborative Innovation Centre of Chemistry for Energy Materials, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
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8
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Liu X, Bing T, Shangguan D. Microbead-Based Platform for Multiplex Detection of DNA and Protein. ACS APPLIED MATERIALS & INTERFACES 2017; 9:9462-9469. [PMID: 28248077 DOI: 10.1021/acsami.7b00418] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We present a novel microbead-based detection platform as a simple and universal strategy for simultaneous determination of multiple biomolecules. This platform is composed of streptavidin coated uniform-sized polystyrene microbeads, dye and biotin-labeled ssDNA or aptamer probes, and quencher-labeled complementary sequences. By this method, upon target binding to the probes, quencher strand dissociation is triggered, which results in fluorescence reactivation of the microbead linked probes. The fluorescence variation is readily monitored by flow cytometry and with a high sensitivity. Explicitly, this microbead-based detection platform shows a high sensitivity for target DNA with a detection limit as low as 0.20 nM, alongside good selectivity from one-base mismatched DNA. This novel platform also shows good selectivity and high sensitivity for protein detection when aptamer is used as a probe. The detection limit for lysozyme is as low as 8.56 nM. Moreover, simultaneous detection of multiple targets has been achieved via incorporating different dye-labeled probes on the microbeads concurrently. We have also applied this developed strategy to the detection of target DNA in human serum. This strategy can be easily extended to other targets through simple probe and quencher variation.
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Affiliation(s)
- Xiangjun Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of the Chinese Academy of Sciences , Beijing 100049, China
| | - Tao Bing
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Dihua Shangguan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of the Chinese Academy of Sciences , Beijing 100049, China
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9
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Xu J, Wang Y, Yang L, Gao Y, Li B, Jin Y. A cytometric assay for ultrasensitive and robust detection of human telomerase RNA based on toehold strand displacement. Biosens Bioelectron 2017; 87:1071-1076. [DOI: 10.1016/j.bios.2016.08.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/12/2016] [Accepted: 08/13/2016] [Indexed: 12/31/2022]
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10
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Chakraborty J, Nath I, Verpoort F. Snapshots of encapsulated porphyrins and heme enzymes in metal-organic materials: A prevailing paradigm of heme mimicry. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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11
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Zhang W, Zu X, Song Y, Zhu Z, Yang CJ. Detection of DNA methyltransferase activity using allosteric molecular beacons. Analyst 2016; 141:579-84. [DOI: 10.1039/c5an01763g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abnormal DNA methylation patterns caused by altered DNA methyltransferase (MTase) activity are closely associated with cancer. Herein, using DNA adenine methylation methyltransferase (Dam MTase) as a model analyte, we designed an allosteric molecular beacon (aMB) for sensitive detection of Dam MTase activity.
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Affiliation(s)
- Weiting Zhang
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation
- Collaborative Innovation Center of Chemistry for Energy Materials
- Key Laboratory for Chemical Biology of Fujian Province
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- College of Chemistry and Chemical Engineering
| | - Xiaolong Zu
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation
- Collaborative Innovation Center of Chemistry for Energy Materials
- Key Laboratory for Chemical Biology of Fujian Province
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- College of Chemistry and Chemical Engineering
| | - Yanling Song
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation
- Collaborative Innovation Center of Chemistry for Energy Materials
- Key Laboratory for Chemical Biology of Fujian Province
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- College of Chemistry and Chemical Engineering
| | - Zhi Zhu
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation
- Collaborative Innovation Center of Chemistry for Energy Materials
- Key Laboratory for Chemical Biology of Fujian Province
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- College of Chemistry and Chemical Engineering
| | - Chaoyong James Yang
- MOE Key Laboratory of Spectrochemical Analysis & Instrumentation
- Collaborative Innovation Center of Chemistry for Energy Materials
- Key Laboratory for Chemical Biology of Fujian Province
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- College of Chemistry and Chemical Engineering
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12
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Ling P, Lei J, Zhang L, Ju H. Porphyrin-Encapsulated Metal–Organic Frameworks as Mimetic Catalysts for Electrochemical DNA Sensing via Allosteric Switch of Hairpin DNA. Anal Chem 2015; 87:3957-63. [DOI: 10.1021/acs.analchem.5b00001] [Citation(s) in RCA: 164] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Pinghua Ling
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Jianping Lei
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Lei Zhang
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
| | - Huangxian Ju
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, People’s Republic of China
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13
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Zhuang J, Tang D, Lai W, Chen G, Yang H. Immobilization-Free Programmable Hairpin Probe for Ultrasensitive Electronic Monitoring of Nucleic Acid Based on a Biphasic Reaction Mode. Anal Chem 2014; 86:8400-7. [DOI: 10.1021/ac501986k] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Junyang Zhuang
- Institute of Nanomedicine
and Nanobiosensing, MOE Key Laboratory of Analysis and Detection for
Food Safety, Department of Chemistry, Fuzhou University, Fuzhou 350108, P.R. China
| | - Dianping Tang
- Institute of Nanomedicine
and Nanobiosensing, MOE Key Laboratory of Analysis and Detection for
Food Safety, Department of Chemistry, Fuzhou University, Fuzhou 350108, P.R. China
| | - Wenqiang Lai
- Institute of Nanomedicine
and Nanobiosensing, MOE Key Laboratory of Analysis and Detection for
Food Safety, Department of Chemistry, Fuzhou University, Fuzhou 350108, P.R. China
| | - Guonan Chen
- Institute of Nanomedicine
and Nanobiosensing, MOE Key Laboratory of Analysis and Detection for
Food Safety, Department of Chemistry, Fuzhou University, Fuzhou 350108, P.R. China
| | - Huanghao Yang
- Institute of Nanomedicine
and Nanobiosensing, MOE Key Laboratory of Analysis and Detection for
Food Safety, Department of Chemistry, Fuzhou University, Fuzhou 350108, P.R. China
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14
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Improvement of a streptavidin-binding aptamer by LNA- and α-l-LNA-substitutions. Bioorg Med Chem Lett 2014; 24:2273-7. [PMID: 24745966 DOI: 10.1016/j.bmcl.2014.03.082] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 12/20/2022]
Abstract
Forty modified versions of a streptavidin-binding aptamer each containing single or multiple LNA or α-l-LNA-substitutions were synthesized and their dissociation constants determined by surface plasmon resonance experiments. Both full-length and truncated versions of the aptamer were studied and compared with the unmodified DNA aptamers. A ∼two-fold improvement in binding affinity was achieved by incorporation of LNA nucleotides in the 3'-part of the stems of the streptavidin-binding aptamer whereas LNA- and α-l-LNA-substitutions in the terminal stem increased the serum stability.
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15
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Feng S, Shang Y, Wu F, Ding F, Li B, Xu J, Xu L, Zhou X. DNA nanomachines as evolved molecular beacons for in vitro and in vivo detection. Talanta 2013; 120:141-7. [PMID: 24468353 DOI: 10.1016/j.talanta.2013.11.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/12/2013] [Accepted: 11/13/2013] [Indexed: 11/30/2022]
Abstract
Modern biosensors require high sensitivity, great signal enhancement and extensive applicability for detection and diagnostic purposes. Traditional molecular beacons (MBs) do not meet these requirements because of the lack of signal amplification. The current amplification pathways using enzymes, DNAzymes and nanoparticles are usually quite sophisticated and are limited to specific applications. Herein, we developed simple biosensors based on the structure of kissing-hairpin. Through hybridization amplification of these nanomachines, the evolved MBs could greatly enhance the detected signals (approximately 10-fold higher than the signals generated by traditional molecular beacons), reduce the sensing limits for targets and, remarkably, distinguish single-base mismatches specifically for nucleic acid detection. In addition, these new MBs can be directly applied in living cells. By introducing aptamer sequences, these novel sensors can also detect proteins and small molecules. These properties were exemplified by the detection of both the β-actin gene and thrombin. The simplicity, sensitivity and flexibility of these devices make them appropriate for more expansive applications.
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Affiliation(s)
- Shuo Feng
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Ye Shang
- College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Fan Wu
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Fei Ding
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Bin Li
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Jiahui Xu
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Liang Xu
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, 430072, PR China
| | - Xiang Zhou
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Wuhan, Hubei, 430072, PR China; State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, PR China.
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16
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Luo Y, Yan X, Huang Y, Wen R, Li Z, Yang L, Yang CJ, Wang Q. ICP-MS-Based Multiplex and Ultrasensitive Assay of Viruses with Lanthanide-Coded Biospecific Tagging and Amplification Strategies. Anal Chem 2013; 85:9428-32. [DOI: 10.1021/ac402446a] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yacui Luo
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xiaowen Yan
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yishun Huang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ruibin Wen
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhaoxin Li
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Limin Yang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chaoyong James Yang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qiuquan Wang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory
of Marine Environmental Science, Xiamen University, Xiamen 361005, China
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17
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Cui L, Ke G, Lin X, Song Y, Zhang H, Guan Z, Zhu Z, Yang CJ. Cyclic enzymatic amplification method (CEAM) based on exonuclease III for highly sensitive bioanalysis. Methods 2013; 63:202-11. [PMID: 23872062 DOI: 10.1016/j.ymeth.2013.07.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 05/23/2013] [Accepted: 07/02/2013] [Indexed: 12/15/2022] Open
Abstract
Nucleic acid molecular probes (NAMPs) have been widely used in the sensing of various chemical and biological substances, as well as physical parameters. However, for traditional nucleic acid molecular probes, the stoichiometric 1:1 binding ratio limits the signal enhancement and thus the sensitivity of the assay. In order to overcome this problem, the cyclic enzymatic amplification method (CEAM) based on exonuclease III has been applied in optical and electrical detection of DNA, proteins and small molecules with excellent sensitivity, selectivity, versatility and simplicity. In this review, the working principle of CEAM is first introduced, followed by the applications of CEAM using different output signals for various analytes. Finally, experimental designs and procedures of CEAM are discussed in detail using displacing probes-based CEAM and linear molecular beacons (LMBs)-based CEAM as two examples.
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Affiliation(s)
- Liang Cui
- State Key Laboratory of Physical Chemistry of Solid Surfaces, The Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Science, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
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18
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Zhang J, Tian J, He Y, Chen S, Jiang Y, Zhao Y, Zhao S. Protein-binding aptamer assisted signal amplification for the detection of influenza A (H1N1) DNA sequences based on quantum dot fluorescence polarization analysis. Analyst 2013; 138:4722-7. [PMID: 23826611 DOI: 10.1039/c3an00830d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We report a fluorescence polarization platform for H1N1 detection based on the construction of a DNA functional QD fluorescence polarization probe and a bi-functional protein binding aptamer (Apt-DNA). The assay has a linear range from 10 nM to 100 nM with a detection limit of 3.45 nM and is selective over the mismatched bases.
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Affiliation(s)
- Juanni Zhang
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering of Guangxi Normal University, Guilin, 541004, China
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19
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Ren W, Liu H, Yang W, Fan Y, Yang L, Wang Y, Liu C, Li Z. A cytometric bead assay for sensitive DNA detection based on enzyme-free signal amplification of hybridization chain reaction. Biosens Bioelectron 2013; 49:380-6. [PMID: 23807231 DOI: 10.1016/j.bios.2013.05.055] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 05/19/2013] [Accepted: 05/30/2013] [Indexed: 01/20/2023]
Abstract
A versatile flow cytometric bead assay (CBA) is developed for sensitive DNA detection by integrating the advantages of hybridization chain reaction (HCR) for enzyme-free signal amplification, flow cytometry for robust and rapid signal readout as well as magnetic beads (MBs) for facile separation. In this HCR-CBA, a biotinylated hairpin DNA (Bio-H1) is firstly immobilized on streptavidin-functionalized MBs. Upon the addition of target DNA, each target would hybridize with one Bio-H1 to open its hairpin structure and subsequently initiate a cascade of hybridization events between two species of fluorescent DNA hairpin probes (H1*/H2*) to form a nicked double helical DNA structure, resulting in amplified accumulation of numerous fluorophores on the MBs. Finally, the fluorescent MBs are directly analyzed by flow cytometry. This technique enables quantitative analysis of the HCR products anchored on the MBs as a function of target DNA concentration, and analysis of each sample can be completed within few minutes. Therefore, the HCR-CBA approach provides a practical DNA assay with greatly improved sensitivity. The detection limit of a model DNA target is 0.5 pM (3σ), which is about 3 orders of magnitude lower compared with traditional hybridization methods without HCR. Furthermore, the signal of complementary target can be clearly distinguished from that of single-base mismatched sequences, indicating the high specificity of the HCR-CBA. Moreover, this strategy is also successfully applied to the DNA analysis in complex biological samples, showing great potential in gene analysis and disease diagnosis in clinical samples.
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Affiliation(s)
- Wei Ren
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei Province, PR China
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20
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Mei H, Bing T, Qi C, Zhang N, Liu X, Chang T, Yan J, Shangguan D. Rational design of Hg2+ controlled streptavidin-binding aptamer. Chem Commun (Camb) 2012; 49:164-6. [PMID: 23168536 DOI: 10.1039/c2cc36416f] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through substituting two canonical base pairs of a streptavidin-binding aptamer with T-T mismatched base pairs, a new aptamer was constructed. Its binding ability could be controlled by Hg(2+) through the formation of T-Hg-T metal-base pairs.
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Affiliation(s)
- Hongcheng Mei
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
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21
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Ke G, Wang C, Ge Y, Zheng N, Zhu Z, Yang CJ. L-DNA molecular beacon: a safe, stable, and accurate intracellular nano-thermometer for temperature sensing in living cells. J Am Chem Soc 2012; 134:18908-11. [PMID: 23126671 DOI: 10.1021/ja3082439] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Noninvasive and accurate measurement of intracellular temperature is of great significance in biology and medicine. This paper describes a safe, stable, and accurate intracellular nano-thermometer based on an L-DNA molecular beacon (L-MB), a dual-labeled hairpin oligonucleotide built from the optical isomer of naturally occurring d-DNA. Relying on the temperature-responsive hairpin structure and the FRET signaling mechanism of MBs, the fluorescence of L-MBs is quenched below the melting temperature and enhanced with increasing temperature. Because of the excellent reversibility and tunable response range, L-MBs are very suitable for temperature sensing. More importantly, the non-natural L-DNA backbone prevents the L-MBs from binding to cellular nucleic acids and proteins as well as from being digested by nucleases inside the cells, thus ensuring excellent stability and accuracy of the nano-thermometer in a complex cellular environment. The L-MB nano-thermometer was used for the photothermal study of Pd nanosheets in living cells, establishing the nano-thermometer as a useful tool for intracellular temperature measurement.
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Affiliation(s)
- Guoliang Ke
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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22
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Cai Z, Song Y, Wu Y, Zhu Z, Yang CJ, Chen X. An electrochemical sensor based on label-free functional allosteric molecular beacons for detection target DNA/miRNA. Biosens Bioelectron 2012; 41:783-8. [PMID: 23102830 DOI: 10.1016/j.bios.2012.10.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Revised: 09/30/2012] [Accepted: 10/02/2012] [Indexed: 02/03/2023]
Abstract
We report two novel electrochemical sensors (E-sensors) for the detection of target DNA and miRNA. The E-sensors were fabricated using label-free functional allosteric molecular beacons (aMBs), which can form streptavidin aptamers to bind to streptavidin peroxidase polymer and so generate catalytic currents in the presence of the targets. These E-sensors eliminate the antigen antibody interactions which require sophisticated DNA modification. During the experiment, we found a pair of CV peaks located at around 0.17 V. These peaks contributed to the redox reaction between TMB and TMB(+), and the adsorption-desorption process of TMB(+) to the negative aMB backbone. When the E-sensor was hybridized with the complement of the aMB sequence, a pair of CV peaks were found at around 0.47 V which were related to the redox reaction between TMB(+) and TMB(2+), and the process of intercalation of the planar structure of TMB(2+) to dsDNA. The RSV-aMB E-sensor could detect 44 amol RSV DNA in the 4 μL sample and performed well in complicated biological environments. The let-7a-aMB E-sensor reached a detection limit of 13.6 amol let-7a miRNA in the 4 μL sample and showed good selectivity for one base mismatched miRNA.
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Affiliation(s)
- Zhimin Cai
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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23
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Wu J, Wang C, Li X, Song Y, Wang W, Li C, Hu J, Zhu Z, Li J, Zhang W, Lu Z, Yang CJ. Identification, characterization and application of a G-quadruplex structured DNA aptamer against cancer biomarker protein anterior gradient homolog 2. PLoS One 2012; 7:e46393. [PMID: 23029506 PMCID: PMC3460915 DOI: 10.1371/journal.pone.0046393] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Accepted: 08/29/2012] [Indexed: 01/01/2023] Open
Abstract
Background Anterior gradient homolog 2 (AGR2) is a functional protein with critical roles in a diverse range of biological systems, including vertebrate tissue development, inflammatory tissue injury responses, and cancer progression. Clinical studies have shown that the AGR2 protein is overexpressed in a wide range of human cancers, including carcinomas of the esophagus, pancreas, breast, prostate, and lung, making the protein as a potential cancer biomarker. However, the general biochemical functions of AGR2 in human cells remain undefined, and the signaling mechanisms that drive AGR2 to inhibit p53 are still not clearly illustrated. Therefore, it is of great interest to develop molecular probes specifically recognizing AGR2 for its detection and for the elucidation of AGR2-associated molecular mechanism. Methodology/Principal Findings Through a bead-based and flow cytometry monitored SELEX technology, we have identified a group of DNA aptamers that can specifically bind to AGR2 with Kd values in the nanomolar range after 14 rounds of selections. Aptamer C14B was chosen to further study, due to its high binding affinity and specificity. The optimized and shortened C14B1 has special G-rich characteristics, and the G-rich region of this binding motif was further characterized to reveal an intramolecular parallel G-quadruplex by CD spectroscopy and UV spectroscopy. Our experiments confirmed that the stability of the G-quadruplex structure was strongly dependent on the nature of the monovalent ions and the formation of G-quadruplex structure was also important for the binding capacity of C14B1 to the target. Furthermore, we have designed a kind of allosteric molecule beacon (aMB) probe for selective and sensitive detection of AGR2. Conclusion/Significance In this work, we have developed new aptamer probes for specific recognition of the AGR2. Structural study have identified that the binding motif of aptamer is an intramolecular parallel G-quadruplex structure and its structure and binding affinity are strongly dependent on the nature of the monovalent ion. Furthermore, with our design of AGR2-aMB, AGR2 could be sensitively and selectively detected. This aptamer probe has great potential to serve as a useful tool for early diagnosis and prognosis of cancer and for fundamental research to elucidate the biochemical functions of AGR2.
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Affiliation(s)
- Jie Wu
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Chi Wang
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Xilan Li
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Yanling Song
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Wei Wang
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Cong Li
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Jia Hu
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Zhi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
- * E-mail: (ZZ); (ZL); (CJY)
| | - Jiuxing Li
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Weiyun Zhang
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
| | - Zhongxian Lu
- Xiamen City Key Laboratory of Metabolism Disease, School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
- * E-mail: (ZZ); (ZL); (CJY)
| | - Chaoyong James Yang
- State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory for Chemical Biology of Fujian Province, Key Laboratory of Analytical Sciences, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, People's Republic of China
- * E-mail: (ZZ); (ZL); (CJY)
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24
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Cui L, Zou Y, Lin N, Zhu Z, Jenkins G, Yang CJ. Mass amplifying probe for sensitive fluorescence anisotropy detection of small molecules in complex biological samples. Anal Chem 2012; 84:5535-41. [PMID: 22686244 DOI: 10.1021/ac300182w] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Fluorescence anisotropy (FA) is a reliable and excellent choice for fluorescence sensing. One of the key factors influencing the FA value for any molecule is the molar mass of the molecule being measured. As a result, the FA method with functional nucleic acid aptamers has been limited to macromolecules such as proteins and is generally not applicable for the analysis of small molecules because their molecular masses are relatively too small to produce observable FA value changes. We report here a molecular mass amplifying strategy to construct anisotropy aptamer probes for small molecules. The probe is designed in such a way that only when a target molecule binds to the probe does it activate its binding ability to an anisotropy amplifier (a high molecular mass molecule such as protein), thus significantly increasing the molecular mass and FA value of the probe/target complex. Specifically, a mass amplifying probe (MAP) consists of a targeting aptamer domain against a target molecule and molecular mass amplifying aptamer domain for the amplifier protein. The probe is initially rendered inactive by a small blocking strand partially complementary to both target aptamer and amplifier protein aptamer so that the mass amplifying aptamer domain would not bind to the amplifier protein unless the probe has been activated by the target. In this way, we prepared two probes that constitute a target (ATP and cocaine respectively) aptamer, a thrombin (as the mass amplifier) aptamer, and a fluorophore. Both probes worked well against their corresponding small molecule targets, and the detection limits for ATP and cocaine were 0.5 μM and 0.8 μM, respectively. More importantly, because FA is less affected by environmental interferences, ATP in cell media and cocaine in urine were directly detected without any tedious sample pretreatment. Our results established that our molecular mass amplifying strategy can be used to design aptamer probes for rapid, sensitive, and selective detection of small molecules by means of FA in complex biological samples.
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Affiliation(s)
- Liang Cui
- Key Laboratory of Analytical Science, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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25
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Song Y, Zhang W, An Y, Cui L, Yu C, Zhu Z, Yang CJ. Label-free visual detection of nucleic acids in biological samples with single-base mismatch detection capability. Chem Commun (Camb) 2012; 48:576-8. [DOI: 10.1039/c1cc15777a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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