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Zhang Y, Wang Y, Rizvi SFA, Zhang Y, Zhang Y, Liu X, Zhang H. Detection of DNA 3'-phosphatase activity based on exonuclease III-assisted cascade recycling amplification reaction. Talanta 2019; 204:499-506. [DOI: 10.1016/j.talanta.2019.06.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 06/04/2019] [Accepted: 06/08/2019] [Indexed: 12/18/2022]
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Wang C, Chen D, Wang Q, Wang Q. Aptamer-based Resonance Light Scattering for Sensitive Detection of Acetamiprid. ANAL SCI 2018; 32:757-62. [PMID: 27396657 DOI: 10.2116/analsci.32.757] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this work, an aptasensor-based resonance light-scattering (RLS) method was developed for the sensitive and selective detection of acetamiprid. The ABA (acetamiprid binding aptamer)-stabilized gold nanoparticles (ABA-AuNPs) were used as a probe. Highly specific single-strand DNA (ssDNA, i.e, aptamers) that bind to acetamiprid with high affinity were employed to discriminate other pesticides, such as edifenphos, kanamycin, metribuzin et. al. The sensing approach is based on a specific interaction between acetamiprid and ABA. Aggregation of AuNPs was specifically induced by the desorption of the ABA from the surface of AuNPs, which caused the RLS signal intensity to be enhanced at 700 nm. The alteration of AuNPs' aggregation has been successfully optimized by controlling several conditions. Under the optimal conditions, the RLS intensity changes (I/I0) of AuNPs were linearly correlated with the acetamiprid concentration in the range of 0 - 100 nM. The detection limit is 1.2 nM (3σ). This method had also been used for acetamiprid detection in lake water samples.
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Affiliation(s)
- Chengke Wang
- College of Food and Biological Engineering, Jiangsu University
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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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