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Chen S, Chen X, Su H, Guo M, Liu H. Advances in Synthetic-Biology-Based Whole-Cell Biosensors: Principles, Genetic Modules, and Applications in Food Safety. Int J Mol Sci 2023; 24:ijms24097989. [PMID: 37175695 PMCID: PMC10178329 DOI: 10.3390/ijms24097989] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/17/2023] [Accepted: 04/21/2023] [Indexed: 05/15/2023] Open
Abstract
A whole-cell biosensor based on synthetic biology provides a promising new method for the on-site detection of food contaminants. The basic components of whole-cell biosensors include the sensing elements, such as transcription factors and riboswitches, and reporting elements, such as fluorescence, gas, etc. The sensing and reporting elements are coupled through gene expression regulation to form a simple gene circuit for the detection of target substances. Additionally, a more complex gene circuit can involve other functional elements or modules such as signal amplification, multiple detection, and delay reporting. With the help of synthetic biology, whole-cell biosensors are becoming more versatile and integrated, that is, integrating pre-detection sample processing, detection processes, and post-detection signal calculation and storage processes into cells. Due to the relative stability of the intracellular environment, whole-cell biosensors are highly resistant to interference without the need of complex sample preprocessing. Due to the reproduction of chassis cells, whole-cell biosensors replicate all elements automatically without the need for purification processing. Therefore, whole-cell biosensors are easy to operate and simple to produce. Based on the above advantages, whole-cell biosensors are more suitable for on-site detection than other rapid detection methods. Whole-cell biosensors have been applied in various forms such as test strips and kits, with the latest reported forms being wearable devices such as masks, hand rings, and clothing. This paper examines the composition, construction methods, and types of the fundamental components of synthetic biological whole-cell biosensors. We also introduce the prospect and development trend of whole-cell biosensors in commercial applications.
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Affiliation(s)
- Shijing Chen
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
| | - Xiaolin Chen
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
| | - Hongfei Su
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
| | - Mingzhang Guo
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
| | - Huilin Liu
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China
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Affiliation(s)
- Fangfei Yin
- Division of Physical Biology CAS Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai China
- University of Chinese Academy of Sciences Beijing China
| | - Fei Wang
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Institute of Translational Medicine Shanghai Jiao Tong University Shanghai China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Institute of Translational Medicine Shanghai Jiao Tong University Shanghai China
- Institute of Molecular Medicine Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai China
| | - Xiaolei Zuo
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Institute of Translational Medicine Shanghai Jiao Tong University Shanghai China
- Institute of Molecular Medicine Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai China
| | - Qian Li
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Institute of Translational Medicine Shanghai Jiao Tong University Shanghai China
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Huang W, Zhou Y, Du J, Deng Y, He Y. Versatile Visual Logic Operations Based on Plasmonic Switching in Label-Free Molybdenum Oxide Nanomaterials. Anal Chem 2018; 90:2384-2388. [DOI: 10.1021/acs.analchem.7b05097] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Wei Huang
- School of Materials Science and Engineering and ‡School of National Defence Science
and Technology, Southwest University of Science and Technology, Mianyang, 621010, People’s Republic of China
| | - Yan Zhou
- School of Materials Science and Engineering and ‡School of National Defence Science
and Technology, Southwest University of Science and Technology, Mianyang, 621010, People’s Republic of China
| | - Jiayan Du
- School of Materials Science and Engineering and ‡School of National Defence Science
and Technology, Southwest University of Science and Technology, Mianyang, 621010, People’s Republic of China
| | - Yuequan Deng
- School of Materials Science and Engineering and ‡School of National Defence Science
and Technology, Southwest University of Science and Technology, Mianyang, 621010, People’s Republic of China
| | - Yi He
- School of Materials Science and Engineering and ‡School of National Defence Science
and Technology, Southwest University of Science and Technology, Mianyang, 621010, People’s Republic of China
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Dai Z, Leung HM, Lo PK. Stimuli-Responsive Self-Assembled DNA Nanomaterials for Biomedical Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1602881. [PMID: 28005298 DOI: 10.1002/smll.201602881] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/31/2016] [Indexed: 05/23/2023]
Abstract
Stimuli-responsive DNA-based materials represent a major class of remarkable functional nanomaterials for nano-biotechnological applications. In this review, recent progress in the development of stimuli-responsive systems based on self-assembled DNA nanostructures is introduced and classified. Representative examples are presented in terms of their design, working principles and mechanisms to trigger the response of the stimuli-responsive DNA system upon expose to a large variety of stimuli including pH, metal ions, oligonucleotides, small molecules, enzymes, heat, and light. Substantial in vitro studies have clearly revealed the advantages of the use of stimuli-responsive DNA nanomaterials in different biomedical applications, particularly for biosensing, drug delivery, therapy and diagnostic purposes in addition to bio-computing. Some of the challenges faced and suggestions for further development are also highlighted.
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Affiliation(s)
- Ziwen Dai
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
- Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China
| | - Hoi Man Leung
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Pik Kwan Lo
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
- Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China
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Dembska A. The analytical and biomedical potential of cytosine-rich oligonucleotides: A review. Anal Chim Acta 2016; 930:1-12. [PMID: 27265899 DOI: 10.1016/j.aca.2016.05.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 04/30/2016] [Accepted: 05/04/2016] [Indexed: 02/04/2023]
Abstract
Polycytosine DNA strands are often found among natural sequences, including the ends of telomeres, centromeres, and introns or in the regulatory regions of genes. A characteristic feature of oligonucleotides that are rich in cytosine (C-rich) is their ability to associate under acidic conditions to form a tetraplex i-motif consisting of two parallel stranded cytosine-hemiprotonated cytosine (C·C+) base-paired duplexes that are mutually intercalated in an antiparallel orientation. Nanotechnology has been exploiting the advantages of i-motif pH-dependent formation to fabricate nanomachines, nanoswitches, electrodes and intelligent nanosurfaces or nanomaterials. Although a few reviews regarding the structure, properties and applications of i-motifs have been published, this review focuses on recently developed biosensors (e.g., to detect pH, glucose or silver ions) and drug-delivery biomaterials. Furthermore, we have included examples of sensors based on parallel C-rich triplexes and silver nanoclusters (AgNCs) fabricated on cytosine-rich DNA strands. The potential diagnostic and therapeutic applications of this type of material are discussed.
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Affiliation(s)
- Anna Dembska
- Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznan, Poland.
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Ma DL, Wang W, Mao Z, Yang C, Chen XP, Lu JJ, Han QB, Leung CH. A tutorial review for employing enzymes for the construction of G-quadruplex-based sensing platforms. Anal Chim Acta 2016; 913:41-54. [DOI: 10.1016/j.aca.2016.01.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/11/2016] [Accepted: 01/19/2016] [Indexed: 01/31/2023]
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Gao RR, Shi S, Zhu Y, Huang HL, Yao TM. A RET-supported logic gate combinatorial library to enable modeling and implementation of intelligent logic functions. Chem Sci 2015; 7:1853-1861. [PMID: 29899907 PMCID: PMC5964972 DOI: 10.1039/c5sc03570h] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 11/17/2015] [Indexed: 12/12/2022] Open
Abstract
A logic gate combinatorial library, including basic logic gates, a single three-input NOR gate, and combinatorial gates to realize intelligent logic functions (keypad-lock, parity checker) is constructed.
Boolean logic gates integrate multiple digital inputs into a digital output. Among these, logic gates based on nucleic acids have attracted a great deal of attention due to the prospect of controlling living systems in the way we control electronic computers. Herein, by employing Thioflavin T (ThT) as a signal transducer, we integrated multiple components based on RET (a type of proto-oncogene) into a logic gate combinatorial library, including basic logic gates (NOR, INHIBIT, IMPLICATION), a single three-input NOR gate, and combinatorial gates (INHIBIT–OR, NOT–AND–NOR). In this library, gates were connected in series where the output of the previous gate was the input for the next gate. Subsequently, by taking advantage of the library, some intelligent logic functions were realized. Expectedly, a biocomputing keypad-lock security system was designed by sequential logic operations. Moreover, a parity checker which can identify even numbers and odd numbers from natural numbers was established successfully. This work helps elucidate the design rules by which simple logic can be harnessed to produce diverse and complex calculations by rewiring communication between different gates. Together, our system may serve as a promising proof of principle that demonstrates increased computational complexity by linking multiple logic gates together.
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Affiliation(s)
- Ru-Ru Gao
- Shanghai Key Laboratory of Chemical Assessment and Sustainability , Department of Chemistry , Tongji University , Shanghai , 200092 , P. R. China . ;
| | - Shuo Shi
- Shanghai Key Laboratory of Chemical Assessment and Sustainability , Department of Chemistry , Tongji University , Shanghai , 200092 , P. R. China . ;
| | - Ying Zhu
- Shanghai Key Laboratory of Chemical Assessment and Sustainability , Department of Chemistry , Tongji University , Shanghai , 200092 , P. R. China . ;
| | - Hai-Liang Huang
- Shanghai Key Laboratory of Chemical Assessment and Sustainability , Department of Chemistry , Tongji University , Shanghai , 200092 , P. R. China . ;
| | - Tian-Ming Yao
- Shanghai Key Laboratory of Chemical Assessment and Sustainability , Department of Chemistry , Tongji University , Shanghai , 200092 , P. R. China . ;
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Guo Y, Yao W, Xie Y, Zhou X, Hu J, Pei R. Logic gates based on G-quadruplexes: principles and sensor applications. Mikrochim Acta 2015. [DOI: 10.1007/s00604-015-1633-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Zhu G, Zhang CY. Functional nucleic acid-based sensors for heavy metal ion assays. Analyst 2015; 139:6326-42. [PMID: 25356810 DOI: 10.1039/c4an01069h] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Heavy metal contaminants such as lead ions (Pb(2+)), mercury ions (Hg(2+)) and silver ions (Ag(+)) can cause significant harm to humans and generate enduring bioaccumulation in ecological systems. Even though a variety of methods have been developed for Pb(2+), Hg(2+) and Ag(+) assays, most of them are usually laborious and time-consuming with poor sensitivity. Due to their unique advantages of excellent catalytic properties and high affinity for heavy metal ions, functional nucleic acids such as DNAzymes and aptamers show great promise in the development of novel sensors for heavy metal ion assays. In this review, we summarize the development of functional nucleic acid-based sensors for the detection of Pb(2+), Hg(2+) and Ag(+), and especially focus on two categories including the direct assay and the amplification-based assay. We highlight the emerging trends in the development of sensitive and selective sensors for heavy metal ion assays as well.
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Affiliation(s)
- Guichi Zhu
- Single-Molecule Detection and Imaging Laboratory, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Guangdong 518055, China.
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Gui R, Jin H, Wang Z, Zhang F, Xia J, Yang M, Bi S, Xia Y. Room-temperature phosphorescence logic gates developed from nucleic acid functionalized carbon dots and graphene oxide. NANOSCALE 2015; 7:8289-8293. [PMID: 25882250 DOI: 10.1039/c4nr07620f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Room-temperature phosphorescence (RTP) logic gates were developed using capture ssDNA (cDNA) modified carbon dots and graphene oxide (GO). The experimental results suggested the feasibility of these developed RTP-based "OR", "INHIBIT" and "OR-INHIBIT" logic gate operations, using Hg(2+), target ssDNA (tDNA) and doxorubicin (DOX) as inputs.
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Affiliation(s)
- Rijun Gui
- College of Chemical Science and Engineering, Collaborative Innovation Center for Marine Biomass Fiber, Materials and Textiles of Shandong Province, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Laboratory of Fiber Materials and Modern Textiles, the Growing Base for State Key Laboratory, Qingdao University, Shandong 266071, PR China.
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Xu L, Guo Y, Wang J, Zhou L, Zhang Y, Hong S, Wang Z, Zhang J, Pei R. A H+/Ag+Dual-Target Responsive Label-Free Light-Up Probe Based on a DNA Triplex. Chem Asian J 2015; 10:1126-9. [DOI: 10.1002/asia.201500001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Indexed: 02/03/2023]
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Wong CY, Chung LH, Lin S, Chan DSH, Leung CH, Ma DL. A ruthenium(II) complex supported by trithiacyclononane and aromatic diimine ligand as luminescent switch-on probe for biomolecule detection and protein staining. Sci Rep 2014; 4:7136. [PMID: 25409703 PMCID: PMC4238014 DOI: 10.1038/srep07136] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Accepted: 11/04/2014] [Indexed: 01/05/2023] Open
Abstract
A new ruthenium(II) complex has been developed for detection of biomolecules. This complex is highly selective for histidine over other amino acids and has been applied to protein staining in an SDS-PAGE gel.
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Affiliation(s)
- Chun-Yuen Wong
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Lai-Hon Chung
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Sheng Lin
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Daniel Shiu-Hin Chan
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Dik-Lung Ma
- 1] Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China [2] Partner State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
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Biosensors with built-in biomolecular logic gates for practical applications. BIOSENSORS-BASEL 2014; 4:273-300. [PMID: 25587423 PMCID: PMC4264359 DOI: 10.3390/bios4030273] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Revised: 08/15/2014] [Accepted: 08/22/2014] [Indexed: 01/20/2023]
Abstract
Molecular logic gates, designs constructed with biological and chemical molecules, have emerged as an alternative computing approach to silicon-based logic operations. These molecular computers are capable of receiving and integrating multiple stimuli of biochemical significance to generate a definitive output, opening a new research avenue to advanced diagnostics and therapeutics which demand handling of complex factors and precise control. In molecularly gated devices, Boolean logic computations can be activated by specific inputs and accurately processed via bio-recognition, bio-catalysis, and selective chemical reactions. In this review, we survey recent advances of the molecular logic approaches to practical applications of biosensors, including designs constructed with proteins, enzymes, nucleic acids, nanomaterials, and organic compounds, as well as the research avenues for future development of digitally operating “sense and act” schemes that logically process biochemical signals through networked circuits to implement intelligent control systems.
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Wang M, Leung KH, Lin S, Chan DSH, Leung CH, Ma DL. A G-quadruplex-based, label-free, switch-on luminescent detection assay for Ag+ions based on the exonuclease III-mediated digestion of C–Ag+–C DNA. J Mater Chem B 2014; 2:6467-6471. [DOI: 10.1039/c4tb01140f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Guan H, Wang W, Liu X, Liang J. Real-time visualization of colorimetric probe for pH-sensitive based on poly-(γ-glutamic acid)-functionalized gold nanoparticles. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.02.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lin S, He B, Shiu-Hin Chan D, Hong Chan PW, Leung CH, Ma DL. A G-quadruplex-based platform for the detection of Hg2+ ions using a luminescent iridium(iii) complex. RSC Adv 2014. [DOI: 10.1039/c4ra11240g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report herein the synthesis of a series of cyclometalated iridium(iii) complexes as luminescent G-quadruplex-selective probes, which were used to construct an oligonucleotide-based platform for the dual detection and removal of Hg2+ ions.
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Affiliation(s)
- Sheng Lin
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong, China
| | - Bingyong He
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong, China
| | | | - Philip Wai Hong Chan
- School of Chemistry
- Monash University
- , Australia
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao, China
| | - Dik-Lung Ma
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong, China
- Partner State Key Laboratory of Environmental and Biological Analysis
- Hong Kong Baptist University
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Ma DL, He HZ, Leung KH, Zhong HJ, Chan DSH, Leung CH. Label-free luminescent oligonucleotide-based probes. Chem Soc Rev 2013; 42:3427-40. [PMID: 23348604 DOI: 10.1039/c2cs35472a] [Citation(s) in RCA: 180] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Breakthrough advances in chemistry and biology over the last two decades have vastly expanded the repertoire of nucleic acid structure and function with potential application in multiple areas of science and technology, including sensing and analytical applications. DNA oligonucleotides represent popular tools for the development of sensing platforms due to their low cost, rich structural polymorphism, and their ability to bind to cognate ligands with sensitivity and specificity rivaling those for protein enzymes and antibodies. In this review, we give an overview of the "label-free" approach that has been a particular focus of our group and others for the construction of luminescent DNA-based sensing platforms. The label-free strategy aims to overcome some of the drawbacks associated with the use of covalently-labeled oligonucleotides prevalent in electrochemical and optical platforms. Label-free DNA-based probes harness the selective interaction between luminescent dyes and functional oligonucleotides that exhibit a "structure-switching" response upon binding to analytes. Based on the numerous examples of label-free luminescent DNA-based probes reported recently, we envisage that this field would continue to thrive and mature in the years to come.
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Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
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Leung KH, He HZ, Ma VPY, Chan DSH, Leung CH, Ma DL. A luminescent G-quadruplex switch-on probe for the highly selective and tunable detection of cysteine and glutathione. Chem Commun (Camb) 2013. [PMID: 23192322 DOI: 10.1039/c2cc37710a] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A G-quadruplex-selective luminescent iridium(III) switch-on probe has been developed for the detection of cysteine (Cys) in aqueous solution. The system is highly sensitive and selective towards Cys with a tunable range of detection. The detection of glutathione (GSH) is also examined.
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Affiliation(s)
- Ka-Ho Leung
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, China
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He HZ, Leung KH, Yang H, Shiu-Hin Chan D, Leung CH, Zhou J, Bourdoncle A, Mergny JL, Ma DL. Label-free detection of sub-nanomolar lead(II) ions in aqueous solution using a metal-based luminescent switch-on probe. Biosens Bioelectron 2013; 41:871-4. [DOI: 10.1016/j.bios.2012.08.060] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Revised: 08/17/2012] [Accepted: 08/30/2012] [Indexed: 12/22/2022]
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Leung CH, Zhong HJ, Lu L, Chan DSH, Ma DL. Luminescent and colorimetric strategies for the label-free DNA-based detection of enzyme activity. Brief Funct Genomics 2013; 12:525-35. [PMID: 23396725 DOI: 10.1093/bfgp/elt004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Enzymes are critically involved in maintaining normal cellular physiology through the catalysis of highly specific and tightly regulated chemical reactions. The inhibition or undesired activation of particular enzymatic functions has been associated with the pathogenesis of a number of diseases. Consequently, the aberrant activity of certain enzymes can be regarded as biomarkers for the diagnosis or monitoring of particular diseases. With rapid technological advances in the field of DNA nanotechnology, oligonucleotides have recently emerged as attractive recognition units for monitoring the activity of enzymes compared with organic small molecules or protein antibodies. In this review article, we present an overview of advantages and versatility of the 'label-free' approach for the fabrication of DNA-based sensing platforms using colorimetric and luminescent molecules as signal transducing units and highlight recent examples of label-free strategies that have been employed for monitoring enzyme activity.
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Affiliation(s)
- Chung-Hang Leung
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong.
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Wu X, Chen J, Zhao JX. A reversible fluorescent logic gate for sensing mercury and iodide ions based on a molecular beacon. Analyst 2013; 138:5281-7. [DOI: 10.1039/c3an01051a] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Leung KH, He HZ, Ma VPY, Yang H, Chan DSH, Leung CH, Ma DL. A G-quadruplex-selective luminescent switch-on probe for the detection of sub-nanomolar human neutrophil elastase. RSC Adv 2013. [DOI: 10.1039/c2ra21996d] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Ma DL, He HZ, Chan DSH, Leung CH. Simple DNA-based logic gates responding to biomolecules and metal ions. Chem Sci 2013. [DOI: 10.1039/c3sc50924a] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Ma DL, Ma VPY, Chan DSH, Leung KH, He HZ, Leung CH. Recent advances in luminescent heavy metal complexes for sensing. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.07.005] [Citation(s) in RCA: 241] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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He HZ, Chan DSH, Leung CH, Ma DL. A highly selective G-quadruplex-based luminescent switch-on probe for the detection of gene deletion. Chem Commun (Camb) 2012; 48:9462-4. [DOI: 10.1039/c2cc32253f] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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