1
|
Chen H, Fu S, Chen X, Chen R, Tan H. Adenosine Triphosphate-Activated Cascade Reactor for On-Demand Antibacterial Treatment Through Controlled Hydroxyl Radical Generation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309403. [PMID: 38148307 DOI: 10.1002/smll.202309403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/01/2023] [Indexed: 12/28/2023]
Abstract
Nanozymes have shown promise for antibacterial applications, but their effectiveness is often hindered by low catalytic performances in physiological conditions and uncontrolled production of hydroxyl radicals (·OH). To address these limitations, a comprehensive approach is presented through the development of an adenosine triphosphate (ATP)-activated cascade reactor (GGPcs). The GGPcs reactor synergistically combines the distinct properties of zeolitic imidazolate framework-8 (ZIF-8) and chitosan-integrated hydrogel microsphere. The ZIF-8 allows for the encapsulation of G-quadruplex/hemin DNAzyme to achieve ATP-responsive ·OH generation at neutral pH, while the hydrogel microsphere creates a confinement environment that facilitates glucose oxidation and provides a sufficient supply of H2O2. Importantly, the integrated chitosan in the hydrogel microsphere shields ZIF-8 from undesired disruption caused by gluconic acid, ensuring the responsive specificity of ZIF-8 toward ATP. By activating GGPcs with ATP secreted by bacteria, its effectiveness as an antibacterial agent is demonstrated for the on-demand treatment of bacterial infection with minimal side effects. This comprehensive approach has the potential to facilitate the design of advanced nanozyme systems and broaden their biological applications.
Collapse
Affiliation(s)
- Huihong Chen
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, P. R. China
| | - Shanshan Fu
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, P. R. China
| | - Xiaoqian Chen
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, P. R. China
| | - Ruyi Chen
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, P. R. China
| | - Hongliang Tan
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, P. R. China
| |
Collapse
|
2
|
Lin X, Fang Y, Chen Q, Guo Z, Chen X, Chen X. Magnetically actuated microfluidic chip combined with a G-quadruplex DNAzyme-based fluorescent/colorimetric sensor for the dual-mode detection of ochratoxin A in wheat. Talanta 2024; 267:125273. [PMID: 37804790 DOI: 10.1016/j.talanta.2023.125273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 09/28/2023] [Accepted: 10/02/2023] [Indexed: 10/09/2023]
Abstract
In this work, a portable fluorescent/colorimetric sensor based on G-quadruplex DNAzyme was constructed to achieve rapid and dual-mode detection of ochratoxin A (OTA) in wheat. OTA aptamers coupled with magnetic beads (MBs) can self-assemble with two segments of DNA and hemin to form a G-quadruplex DNAzyme structure that can catalyze the oxidation of Amplex Red (ADHP) with H2O2, making the solution red and producing strong fluorescence in solution. However, in the presence of OTA, the structure of the G-quadruplex DNAzyme was damaged, resulting in reduced catalytic activity. According to the principle of detection, a magnet-controlled chip integrating the reaction, washing, and detection was designed in this study. Shuttling the MB-DNAzyme probes onto a magnetically controlled chip considerably reduced the background signal and improved the detection efficiency and sensitivity. In addition, a portable fluorescence and colorimetric detection platform was built for on-site OTA detection.
Collapse
Affiliation(s)
- Xueqi Lin
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, China.
| | - Yuwen Fang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, China.
| | - Quansheng Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, China.
| | - Zhiyong Guo
- Institute of Analytical Technology and Smart Instruments and Colleague of Environment and Public Healthy, Xiamen Huaxia University, Xiamen, 361024, China.
| | - Xi Chen
- State Key Laboratory of Marine Environmental Science, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Xiaomei Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen, 361021, China.
| |
Collapse
|
3
|
Güner D, Şener BB, Bayraç C. Label free detection of auramine O by G-quadruplex-based fluorescent turn-on strategy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 267:120532. [PMID: 34776374 DOI: 10.1016/j.saa.2021.120532] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 10/19/2021] [Accepted: 10/22/2021] [Indexed: 06/13/2023]
Abstract
Auramine o (AO) is a synthetic dye used in paper and textile industries. Although it has been an unauthorized food additive in many countries due to its toxic and carcinogenic possibility, its illegal uses have been detected in certain food products such as pasta, semolina and spices and also in pharmaceuticals. The presence of AO in food products should be monitored, therefore, to minimize the negative health effects on consumers. In this study, a simple, highly sensitive and selective label free detection method was investigated for AO by G-quadruplex-based fluorescent turn-on strategy. The optimum fluorescent detection assay was achieved with a specific G-quadruplex DNA sequence, c-myc, at 400 nM in Tris-HCl buffer at pH 7.4. The linearity of fluorescence intensity depending on AO concentration ranged from 0 to 0.07 µM and LOD and LOQ were 3 nM and 10 nM, respectively. The G-quadruplex-based detection assay was highly specific for AO as compared to other two synthetic food colorings and successfully applied to determine AO in pasta, bulgur and curry powder with recoveries in the range from 70.33% to 106.49%. This G-quadruplex-based label free detection assay has a significant potential to be used in the detection of AO in food products.
Collapse
Affiliation(s)
- Dilan Güner
- Department of Bioengineering, Karamanoğlu Mehmetbey University, Karaman, Turkey
| | | | - Ceren Bayraç
- Department of Bioengineering, Karamanoğlu Mehmetbey University, Karaman, Turkey.
| |
Collapse
|
4
|
Jenni S, Renault K, Dejouy G, Debieu S, Laly M, Romieu A. In Situ Synthesis of Phenoxazine Dyes in Water: Application for "Turn‐On" Fluorogenic and Chromogenic Detection of Nitric Oxide. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202100268] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sébastien Jenni
- Burgundy Franche-Comté University: Universite Bourgogne Franche-Comte ICMUB - UMR CNRS 6302 FRANCE
| | - Kévin Renault
- Burgundy Franche-Comté University: Universite Bourgogne Franche-Comte ICMUB - UMR CNRS 6302 FRANCE
| | - Garance Dejouy
- Burgundy Franche-Comté University: Universite Bourgogne Franche-Comte ICMUB - UMR CNRS 6302 FRANCE
| | - Sylvain Debieu
- Burgundy Franche-Comté University: Universite Bourgogne Franche-Comte ICMUB - UMR CNRS 6302 FRANCE
| | - Myriam Laly
- Burgundy Franche-Comté University: Universite Bourgogne Franche-Comte ICMUB - UMR CNRS 6302 FRANCE
| | - Anthony Romieu
- University of Burgundy Franche-Comté ICMUB - UMR CNRS 6302 Faculté des Sciences Mirande9, avenue Alain SavaryBP 47870 21078 Dijon FRANCE
| |
Collapse
|
5
|
Xi H, Juhas M, Zhang Y. G-quadruplex based biosensor: A potential tool for SARS-CoV-2 detection. Biosens Bioelectron 2020; 167:112494. [PMID: 32791468 PMCID: PMC7403137 DOI: 10.1016/j.bios.2020.112494] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/26/2020] [Accepted: 07/31/2020] [Indexed: 12/29/2022]
Abstract
G-quadruplex is a non-canonical nucleic acid structure formed by the folding of guanine rich DNA or RNA. The conformation and function of G-quadruplex are determined by a number of factors, including the number and polarity of nucleotide strands, the type of cations and the binding targets. Recent studies led to the discovery of additional advantageous attributes of G-quadruplex with the potential to be used in novel biosensors, such as improved ligand binding and unique folding properties. G-quadruplex based biosensor can detect various substances, such as metal ions, organic macromolecules, proteins and nucleic acids with improved affinity and specificity compared to standard biosensors. The recently developed G-quadruplex based biosensors include electrochemical and optical biosensors. A novel G-quadruplex based biosensors also show better performance and broader applications in the detection of a wide spectrum of pathogens, including SARS-CoV-2, the causative agent of COVID-19 disease. This review highlights the latest developments in the field of G-quadruplex based biosensors, with particular focus on the G-quadruplex sequences and recent applications and the potential of G-quadruplex based biosensors in SARS-CoV-2 detection.
Collapse
Affiliation(s)
- Hui Xi
- College of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong, 518055, China
| | - Mario Juhas
- Medical and Molecular Microbiology Unit, Department of Medicine, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - Yang Zhang
- College of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, Guangdong, 518055, China.
| |
Collapse
|
6
|
Kosman J, Juskowiak B. Bioanalytical Application of Peroxidase-Mimicking DNAzymes: Status and Challenges. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2019; 170:59-84. [PMID: 28474157 DOI: 10.1007/10_2017_7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
DNAzymes with peroxidase-mimicking activity are a new class of catalytically active DNA molecules. This system is formed as a complex of hemin and a G-quadruplex structure created by oligonucleotides rich in guanine. Considering catalytic activity, this DNAzyme mimics horseradish peroxidase, the enzyme most commonly used for signal generation in bioassays. Because DNAzymes exhibit many advantages over protein enzymes (thermal stability, easy and cheap synthesis and purification) they can successfully replace HRP in bioanalytical applications. HRP-like DNAzymes have been applied in the detection of several DNA sequences. Many amplification techniques have been conjugated with DNAzyme systems, resulting in ultrasensitive bioassays. On the other hand, the combination of aptamers and DNAzymes has led to the development of aptazymes for specific targets. An up-to-date summary of the most interesting DNAzyme-based assays is presented here. The elaborated systems can be used in medical diagnosis or chemical and biological studies.
Collapse
Affiliation(s)
- J Kosman
- Laboratory of Bioanalytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland.
| | - B Juskowiak
- Laboratory of Bioanalytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Poznan, Poland
| |
Collapse
|
7
|
Gao T, Chai W, Shi L, Shi H, Sheng A, Yang J, Li G. A new colorimetric assay method for the detection of anti-hepatitis C virus antibody with high sensitivity. Analyst 2019; 144:6365-6370. [DOI: 10.1039/c9an01466g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A sensitive colorimetric assay method has been proposed for the detection of antibody by specifically assembling tandemly repeated DNAzymes on its “Y”-shaped structure, which has been used to determine anti-HCV Ab in serum with high sensitivity.
Collapse
Affiliation(s)
- Tao Gao
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing 210023
- P. R. China
| | - Wenxin Chai
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing 210023
- P. R. China
| | - Liu Shi
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing 210023
- P. R. China
| | - Hai Shi
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing 210023
- P. R. China
| | - Anzhi Sheng
- Center for Molecular Recognition and Biosensing
- School of Life Sciences
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jie Yang
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing 210023
- P. R. China
| | - Genxi Li
- State Key Laboratory of Pharmaceutical Biotechnology
- School of Life Sciences
- Nanjing University
- Nanjing 210023
- P. R. China
| |
Collapse
|
8
|
Highly sensitive on-site detection of glucose in human urine with naked eye based on enzymatic-like reaction mediated etching of gold nanorods. Biosens Bioelectron 2017; 89:932-936. [DOI: 10.1016/j.bios.2016.09.090] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/21/2016] [Accepted: 09/25/2016] [Indexed: 11/17/2022]
|
9
|
Weng S, Feng F, Guo H, Wu N, Zheng Y, Lin Z, Lin X. In SituGrowth of Plasmonic Gold Nanoparticles for the Direct and Sensitive Colorimetric Assay of Glucose. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shaohuang Weng
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, the Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province; Fujian Medical University; Fuzhou 350108 China
| | - Feng Feng
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, the Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province; Fujian Medical University; Fuzhou 350108 China
| | - Honghui Guo
- Engineering Research Center of Marine Biological Resource Comprehensive Utilization; Third Institute of Oceanography, State Oceanic Administration; Xiamen 361005 China
| | - Namei Wu
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, the Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province; Fujian Medical University; Fuzhou 350108 China
| | - Yanjie Zheng
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, the Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province; Fujian Medical University; Fuzhou 350108 China
| | - Zhen Lin
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, the Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province; Fujian Medical University; Fuzhou 350108 China
| | - Xinhua Lin
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, the Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province; Fujian Medical University; Fuzhou 350108 China
| |
Collapse
|
10
|
A simple method to produce 2D and 3D microfluidic paper-based analytical devices for clinical analysis. Anal Chim Acta 2017; 957:40-46. [PMID: 28107832 DOI: 10.1016/j.aca.2017.01.002] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 12/19/2016] [Accepted: 01/02/2017] [Indexed: 11/20/2022]
Abstract
This paper describes the fabrication of 2D and 3D microfluidic paper-based analytical devices (μPADs) for monitoring glucose, total protein, and nitrite in blood serum and artificial urine. A new method of cutting and sealing filter paper to construct μPADs was demonstrated. Using an inexpensive home cutter printer soft cellulose-based filter paper was easily and precisely cut to produce pattern hydrophilic microchannels. 2D and 3D μPADs were designed with three detection zones each for the colorimetric detection of the analytes. A small volume of samples was added to the μPADs, which was photographed after 15 min using a digital camera. Both μPADs presented an excellent analytical performance for all analytes. The 2D device was applied in artificial urine samples and reached limits of detection (LODs) of 0.54 mM, 5.19 μM, and 2.34 μM for glucose, protein, and nitrite, respectively. The corresponding LODs of the 3D device applied for detecting the same analytes in artificial blood serum were 0.44 mM, 1.26 μM, and 4.35 μM.
Collapse
|
11
|
Liu H, Ma C, Wang J, Chen H, Wang K. Label-free colorimetric assay for T4 polynucleotide kinase/phosphatase activity and its inhibitors based on G-quadruplex/hemin DNAzyme. Anal Biochem 2016; 517:18-21. [PMID: 27984013 DOI: 10.1016/j.ab.2016.10.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/17/2016] [Accepted: 10/22/2016] [Indexed: 10/20/2022]
Abstract
Here we report a new approach for label-free colorimetric assay of T4 polynucleotide kinase/phosphatase (PNKP) activity based on G-quadruplex/hemin DNAzyme. In the presence of T4 PNKP, the DNA primer with a 3'-phosphate can be dephosphorylated into a 3'-hydroxyl and initiate a primer elongation reaction to open the hairpin probe, and leading to releasing the G-quartets. Under optimal conditions, the proposed method exhibited a considerable performance with a detection limit of 0.01 U/mL. Furthermore, the present assay can be used to study the potential T4 PNKP inhibitor screening, making it promise to be applied in the fields of drug discovery.
Collapse
Affiliation(s)
- Haisheng Liu
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha 410013, China
| | - Changbei Ma
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha 410013, China.
| | - Jun Wang
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha 410013, China
| | - Hanchun Chen
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha 410013, China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410081, China
| |
Collapse
|
12
|
A disposable biosensor for noninvasive diabetic diagnosis rest on the Au/TiO2 nano-composite intensified electrochemiluminescence. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.06.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
13
|
Jiang X, Zhang H, Wu J, Yang X, Shao J, Lu Y, Qiu B, Lin Z, Chen G. G-quadruplex DNA biosensor for sensitive visible detection of genetically modified food. Talanta 2014; 128:445-9. [PMID: 25059184 DOI: 10.1016/j.talanta.2014.05.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 04/27/2014] [Accepted: 05/02/2014] [Indexed: 12/26/2022]
Abstract
In this paper, a novel label-free G-quadruplex DNAzyme sensor has been proposed for colorimetric identification of GMO using CaMV 35S promoter sequence as the target. The binary probes can fold into G-quadruplex structure in the presence of DNA-T (Target DNA) and then combine with hemin to form a DNAzyme resembling horseradish peroxidase. The detection system consists of two G-rich probes with 2:2 split mode by using the absorbance and color of ABTS(2-) as signal reporter. Upon the addition of a target sequence, two probes both hybridize with target and then their G-rich sequences combine to form a G-quadruplex DNAzyme, and the DNAzyme can catalyze the reaction of ABTS(2-) with H2O2. Then the linear range is from 0.05 to 0.5 μM while detection limit is 5nM. These results demonstrate that the proposed G-quadruplex DNAzyme method could be used as a simple, sensitive and cost-effective approach for assays of GMO.
Collapse
Affiliation(s)
- Xiaohua Jiang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian 350002, China; School of Applied Chemistry and Biological Technology, Shenzhen Polytechnic, Shenzhen, Guangdong 518055, China
| | - Huimin Zhang
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Jun Wu
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Xiang Yang
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Jingwei Shao
- Cancer Metastasis Alert and Prevention Center, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
| | - Yujing Lu
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Bin Qiu
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian 350002, China.
| | - Zhenyu Lin
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Guonan Chen
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou University, Fuzhou, Fujian 350002, China
| |
Collapse
|
14
|
G-quadruplexes as sensing probes. Molecules 2013; 18:14760-79. [PMID: 24288003 PMCID: PMC6270327 DOI: 10.3390/molecules181214760] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/13/2013] [Accepted: 11/13/2013] [Indexed: 01/09/2023] Open
Abstract
Guanine-rich sequences of DNA are able to create tetrastranded structures known as G-quadruplexes; they are formed by the stacking of planar G-quartets composed of four guanines paired by Hoogsteen hydrogen bonding. G-quadruplexes act as ligands for metal ions and aptamers for various molecules. Interestingly, the G-quadruplexes form a complex with anionic porphyrin hemin and exhibit peroxidase-like activity. This review focuses on overview of sensing techniques based on G-quadruplex complexes with anionic porphyrins for detection of various analytes, including metal ions such as K+, Ca2+, Ag+, Hg2+, Cu2+, Pb2+, Sr2+, organic molecules, nucleic acids, and proteins. Principles of G-quadruplex-based detection methods involve DNA conformational change caused by the presence of analyte which leads to a decrease or an increase in peroxidase activity, fluorescence, or electrochemical signal of the used probe. The advantages of various detection techniques are also discussed.
Collapse
|