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Song YQ, Li GD, Niu D, Chen F, Jing S, Wai Wong VK, Wang W, Leung CH. A robust luminescent assay for screening alkyladenine DNA glycosylase inhibitors to overcome DNA repair and temozolomide drug resistance. J Pharm Anal 2023; 13:514-522. [PMID: 37305785 PMCID: PMC10257196 DOI: 10.1016/j.jpha.2023.04.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/22/2023] [Accepted: 04/15/2023] [Indexed: 06/13/2023] Open
Abstract
Temozolomide (TMZ) is an anticancer agent used to treat glioblastoma, typically following radiation therapy and/or surgical resection. However, despite its effectiveness, at least 50% of patients do not respond to TMZ, which is associated with repair and/or tolerance of TMZ-induced DNA lesions. Studies have demonstrated that alkyladenine DNA glycosylase (AAG), an enzyme that triggers the base excision repair (BER) pathway by excising TMZ-induced N3-methyladenine (3meA) and N7-methylguanine lesions, is overexpressed in glioblastoma tissues compared to normal tissues. Therefore, it is essential to develop a rapid and efficient screening method for AAG inhibitors to overcome TMZ resistance in glioblastomas. Herein, we report a robust time-resolved photoluminescence platform for identifying AAG inhibitors with improved sensitivity compared to conventional steady-state spectroscopic methods. As a proof-of-concept, this assay was used to screen 1440 food and drug administration-approved drugs against AAG, resulting in the repurposing of sunitinib as a potential AAG inhibitor. Sunitinib restored glioblastoma (GBM) cancer cell sensitivity to TMZ, inhibited GBM cell proliferation and stem cell characteristics, and induced GBM cell cycle arrest. Overall, this strategy offers a new method for the rapid identification of small-molecule inhibitors of BER enzyme activities that can prevent false negatives due to a fluorescent background.
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Affiliation(s)
- Ying-Qi Song
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, 999078, China
| | - Guo-Dong Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, 999078, China
| | - Dou Niu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, 999078, China
| | - Feng Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, 999078, China
| | - Shaozhen Jing
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Vincent Kam Wai Wong
- Dr. Neher's Biophysics Laboratory for Innovative Drug Discovery, State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macao, 999078, China
| | - Wanhe Wang
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, 999078, China
- Department of Biomedical Sciences, Faculty of Health Sciences, University of Macau, Macao, 999078, China
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Ravichandran S, Razzaq M, Parveen N, Ghosh A, Kim KK. The effect of hairpin loop on the structure and gene expression activity of the long-loop G-quadruplex. Nucleic Acids Res 2021; 49:10689-10706. [PMID: 34450640 PMCID: PMC8501965 DOI: 10.1093/nar/gkab739] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/10/2021] [Accepted: 08/24/2021] [Indexed: 12/29/2022] Open
Abstract
G-quadruplex (G4), a four-stranded DNA or RNA structure containing stacks of guanine tetrads, plays regulatory roles in many cellular functions. So far, conventional G4s containing loops of 1–7 nucleotides have been widely studied. Increasing experimental evidence suggests that unconventional G4s, such as G4s containing long loops (long-loop G4s), play a regulatory role in the genome by forming a stable structure. Other secondary structures such as hairpins in the loop might thus contribute to the stability of long-loop G4s. Therefore, investigation of the effect of the hairpin-loops on the structure and function of G4s is required. In this study, we performed a systematic biochemical investigation of model G4s containing long loops with various sizes and structures. We found that the long-loop G4s are less stable than conventional G4s, but their stability increased when the loop forms a hairpin (hairpin-G4). We also verified the biological significance of hairpin-G4s by showing that hairpin-G4s present in the genome also form stable G4s and regulate gene expression as confirmed by in cellulo reporter assays. This study contributes to expanding the scope and diversity of G4s, thus facilitating future studies on the role of G4s in the human genome.
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Affiliation(s)
- Subramaniyam Ravichandran
- Department of Precision Medicine, Graduate School of Basic Medical Science (GSBMS), Institute for Antimicrobial Resistance Research and Therapeutics, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
| | - Maria Razzaq
- Department of Precision Medicine, Graduate School of Basic Medical Science (GSBMS), Institute for Antimicrobial Resistance Research and Therapeutics, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
| | - Nazia Parveen
- Department of Precision Medicine, Graduate School of Basic Medical Science (GSBMS), Institute for Antimicrobial Resistance Research and Therapeutics, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
| | - Ambarnil Ghosh
- Department of Precision Medicine, Graduate School of Basic Medical Science (GSBMS), Institute for Antimicrobial Resistance Research and Therapeutics, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
| | - Kyeong Kyu Kim
- Department of Precision Medicine, Graduate School of Basic Medical Science (GSBMS), Institute for Antimicrobial Resistance Research and Therapeutics, Sungkyunkwan University School of Medicine, Suwon 16419, Republic of Korea
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3
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Advances in oligonucleotide-based detection coupled with fluorescence resonance energy transfer. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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4
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Mao X, Li Q, Zuo X, Fan C. Catalytic Nucleic Acids for Bioanalysis. ACS APPLIED BIO MATERIALS 2019; 3:2674-2685. [PMID: 35025402 DOI: 10.1021/acsabm.9b00928] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiuhai Mao
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Qian Li
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaolei Zuo
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Chunhai Fan
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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5
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A recyclable biointerface based on cross-linked branched DNA nanostructures for ultrasensitive nucleic acid detection. Biosens Bioelectron 2018; 117:562-566. [DOI: 10.1016/j.bios.2018.06.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 06/25/2018] [Accepted: 06/26/2018] [Indexed: 12/13/2022]
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6
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Kulkarni B, Jayakannan M. Fluorescent-Tagged Biodegradable Polycaprolactone Block Copolymer FRET Probe for Intracellular Bioimaging in Cancer Cells. ACS Biomater Sci Eng 2017; 3:2185-2197. [DOI: 10.1021/acsbiomaterials.7b00426] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Bhagyashree Kulkarni
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India
| | - Manickam Jayakannan
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pune 411008, Maharashtra, India
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7
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Wang T, Wang L, Li X, Hu X, Han Y, Luo Y, Wang Z, Li Q, Aldalbahi A, Wang L, Song S, Fan C, Zhao Y, Wang M, Chen N. Size-Dependent Regulation of Intracellular Trafficking of Polystyrene Nanoparticle-Based Drug-Delivery Systems. ACS APPLIED MATERIALS & INTERFACES 2017; 9:18619-18625. [PMID: 28497682 DOI: 10.1021/acsami.7b05383] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Nanoparticles (NPs) have shown great promise as intracellular imaging probes or nanocarriers and are increasingly being used in biomedical applications. A detailed understanding of how NPs get "in and out" of cells is important for developing new nanomaterials with improved selectivity and less cytotoxicity. Both physical and chemical characteristics have been proven to regulate the cellular uptake of NPs. However, the exocytosis process and its regulation are less explored. Herein, we investigated the size-regulated endocytosis and exocytosis of carboxylated polystyrene (PS) NPs. PS NPs with a smaller size were endocytosed mainly through the clathrin-dependent pathway, whereas PS NPs with a larger size preferred caveolae-mediated endocytosis. Furthermore, our results revealed exocytosis of larger PS NPs and tracked the dynamic process at the single-particle level. These results indicate that particle size is a key factor for the regulation of intracellular trafficking of NPs and provide new insight into the development of more effective cellular nanocarriers.
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Affiliation(s)
- Ting Wang
- College of Life Sciences, Sichuan University , Chengdu 610064, China
| | - Lu Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Xiaoming Li
- School of Life Science and Technology, ShanghaiTech University , Shanghai 201210, China
| | - Xingjie Hu
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Yuping Han
- College of Life Sciences, Sichuan University , Chengdu 610064, China
| | - Yao Luo
- College of Life Sciences, Sichuan University , Chengdu 610064, China
| | - Zejun Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Qian Li
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Ali Aldalbahi
- Chemistry Department, King Saud University , Riyadh 11451, Saudi Arabia
| | - Lihua Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Shiping Song
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Chunhai Fan
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
| | - Yun Zhao
- College of Life Sciences, Sichuan University , Chengdu 610064, China
| | - Maolin Wang
- College of Life Sciences, Sichuan University , Chengdu 610064, China
| | - Nan Chen
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
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8
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Cui Q, Yang Y, Yao C, Liu R, Li L. Aggregation-Induced Energy Transfer of Conjugated Polymer Materials for ATP Sensing. ACS APPLIED MATERIALS & INTERFACES 2016; 8:35578-35586. [PMID: 27966847 DOI: 10.1021/acsami.6b12525] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Water-soluble conjugated polymers are attractive fluorescent materials for applications in chemical and biological sensing. The molecular wire effect of such polymers amplifies changes in the fluorescence signal, which can be used for detecting various analytes with high sensitivity. In this work, we report an efficient ratiometric fluorescent probe based on a water-soluble conjugated polymer that showed high sensitivity and selectivity toward adenosine 5'-triphosphate (ATP). The macromolecular probe consisted of a polyfluorene backbone doped with 5 mol % 1,4-dithienylbenzothiadiazole (DBT) modified by bis-imidazolium and oligo(ethylene glycol) moieties. Solutions of the polymer emitted purple fluorescence, which changed to red upon addition of ATP molecules. The addition of ATP caused the polymer to aggregate, which enhanced fluorescence resonance energy transfer efficiency from the fluorene segments to DBT units, leading to an increase in red emission. The ratio of the fluorescence at these different wavelengths (I655/I423) showed a strong dependence on the ATP concentration. PF-DBT-BIMEG also exhibited high selectivity for ATP sensing over other representative anions and discriminated it from adenosine 5'-diphosphate (ADP) and adenosine 5'-monophosphate (AMP). This can be explained by the much stronger electrostatic interactions between the polymer and ATP than the interactions between the polymer and ADP or AMP, as confirmed through molecular dynamics simulations.
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Affiliation(s)
- Qianling Cui
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Yu Yang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Chuang Yao
- College of Mechanical and Electrical Engineering, Yangtze Normal University , Chongqing 408100, China
| | - Ronghua Liu
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
| | - Lidong Li
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, China
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Lin S, Kang TS, Lu L, Wang W, Ma DL, Leung CH. A G-quadruplex-selective luminescent probe with an anchor tail for the switch-on detection of thymine DNA glycosylase activity. Biosens Bioelectron 2016; 86:849-857. [DOI: 10.1016/j.bios.2016.07.082] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 07/23/2016] [Accepted: 07/23/2016] [Indexed: 11/25/2022]
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10
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Chovelon B, Fiore E, Faure P, Peyrin E, Ravelet C. A lifetime-sensitive fluorescence anisotropy probe for DNA-based bioassays: The case of SYBR Green. Biosens Bioelectron 2016; 90:140-145. [PMID: 27886600 DOI: 10.1016/j.bios.2016.11.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/01/2016] [Accepted: 11/20/2016] [Indexed: 12/12/2022]
Abstract
In standard steady-state fluorescence anisotropy (FA) DNA-based assays, the ligand binding to a given receptor is typically signalled by the rotational correlation time changes of the tracer. Herein, we report a radically different strategy that relies on the peculiar excited state lifetime features of the SYBR Green (SG) dye. This DNA-binding probe exhibits a drastically short lifetime in solution, leading to a high FA signal. Its complexation to oligonucleotides determines a singular and very large depolarization depending on the concerted effects of extreme lifetime enhancement and resonance energy homotransfer. On the basis of ligand-induced changes in the molar fractions of bound and free forms of SG, the approach provides an unprecedented means for the FA monitoring of the ligand binding to short DNA molecules, allowing the elaboration of a variety of intercalator displacement assays and label-free biosensors that involve diverse DNA structures (duplex, hairpin, G-quadruplex and single-stranded), ligand types (ion, small organic molecule and protein) and binding modes (intercalation, minor groove, allosteric switch). These findings open up promising avenues in the design of a new generation of FA assays.
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Affiliation(s)
- Benoit Chovelon
- University Grenoble Alpes, DPM UMR 5063, F-38041 Grenoble, France; CNRS, DPM UMR 5063, F-38041 Grenoble, France; Département de Biochimie, Toxicologie et Pharmacologie, CHU de Grenoble site Nord - Institut de biologie et de pathologie, F-38041 Grenoble, France
| | - Emmanuelle Fiore
- University Grenoble Alpes, DPM UMR 5063, F-38041 Grenoble, France; CNRS, DPM UMR 5063, F-38041 Grenoble, France
| | - Patrice Faure
- Département de Biochimie, Toxicologie et Pharmacologie, CHU de Grenoble site Nord - Institut de biologie et de pathologie, F-38041 Grenoble, France; University Grenoble Alpes, Laboratory of Hypoxy Physiopathology Study Inserm U1042, 38700 La Tronche, France
| | - Eric Peyrin
- University Grenoble Alpes, DPM UMR 5063, F-38041 Grenoble, France; CNRS, DPM UMR 5063, F-38041 Grenoble, France.
| | - Corinne Ravelet
- University Grenoble Alpes, DPM UMR 5063, F-38041 Grenoble, France; CNRS, DPM UMR 5063, F-38041 Grenoble, France.
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11
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Lin S, Lu L, Kang TS, Mergny JL, Leung CH, Ma DL. Interaction of an Iridium(III) Complex with G-Quadruplex DNA and Its Application in Luminescent Switch-On Detection of Siglec-5. Anal Chem 2016; 88:10290-10295. [PMID: 27678199 DOI: 10.1021/acs.analchem.6b03128] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Sialic acid (Sia) binding immunoglobulin (Ig)-like lectin-5 (Siglec-5) is a type-I transmembrane protein, and it has been demonstrated as a biomarker of granulocytic maturation and acute myeloid leukemia phenotype. Herein we aimed to construct a method that could sensitively detect Siglec-5 by taking advantage of the high affinity and selectivity of the K19 aptamer for its cognate target, and the selective interaction of luminescent iridium(III) transition metal complexes with G-quadruplex DNA. The iridium(III) complex 1 [Ir(tpyd)2(2,9-dmphen)]PF6 (where tpyd =2-(m-tolyl)pyridine; 2,9-dmphen =2,9-dimethyl-1,10-phenanthroline) was synthesized, and it displayed high luminescence for G-quadruplex DNA compared to dsDNA and ssDNA. Additionally, complex 1 exhibited a blue shift luminescence response to c-kit2 G-quadruplex, and the interaction between 1 and G-quadruplexes was discussed based on the results of G-tetrad assay, loop effect assay, and other assays. Then complex 1 was utilized to develop a G-quadruplex-based sensing platform for Siglec-5 in aqueous solution. Upon the addition of Siglec-5, the specific binding of the K19 aptamer sequence results in a conformational change that generates a split G-quadruplex structure, which is then recognized by the G-quadruplex-specific iridium(III) complex with an enhanced luminescent response. Futhermore, the use of the assay for detecting Siglec-5 in cellular debris was demonstrated.
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Affiliation(s)
- Sheng Lin
- Department of Chemistry, Hong Kong Baptist University , Kowloon Tong, Hong Kong, China , 999077
| | - Lihua Lu
- Department of Chemistry, Hong Kong Baptist University , Kowloon Tong, Hong Kong, China , 999077.,College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Qingdao, China , 266109
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao, China , 999078
| | - Jean-Louis Mergny
- INSERM, U1212, CNRS, UMR 5320, IECB, Pessac, France , 33607.,University of Bordeaux , ARNA Laboratory, Bordeaux, France , 33370
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao, China , 999078
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University , Kowloon Tong, Hong Kong, China , 999077
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Lin S, He B, Yang C, Leung CH, Mergny JL, Ma DL. Luminescence switch-on assay of interferon-gamma using a G-quadruplex-selective iridium(III) complex. Chem Commun (Camb) 2016; 51:16033-6. [PMID: 26399215 DOI: 10.1039/c5cc06655g] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this study, we synthesized a series of 9 luminescent iridium(III) complexes and studied their ability to function as luminescent probes for G-quadruplex DNA. The iridium(III) complex 8 [Ir(pbtz)2(dtbpy)]PF6 (where pbtz = 2-phenylbenzo[d]thiazole; dtbpy = 4,4'-di-tert-butyl-2,2'-bipyridine) showed high selectivity for G-quadruplex DNA over single-stranded and double-stranded DNA, and was subsequently utilized for the development of a label-free oligonucleotide-based assay for interferon-gamma (IFN-γ), an important biomarker for a range of immune and infectious diseases, in aqueous solution. We further demonstrated that this assay could monitor IFN-γ levels even in the presence of cellular debris. This assay represents the first G-quadruplex-based assay for IFN-γ detection described in the literature.
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Affiliation(s)
- Sheng Lin
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
| | - Bingyong He
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
| | - Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China.
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China.
| | - Jean-Louis Mergny
- University of Bordeaux, ARNA laboratory, Bordeaux, France. and INSERM, U869, IECB, Pessac, France
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China. and Partner State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
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Lin S, Yang C, Mao Z, He B, Wang YT, Leung CH, Ma DL. A G-pentaplex-based assay for Cs + ions in aqueous solution using a luminescent Ir(III) complex. Biosens Bioelectron 2016; 77:609-12. [DOI: 10.1016/j.bios.2015.10.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/08/2015] [Accepted: 10/09/2015] [Indexed: 10/22/2022]
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Chen Z, Tan L, Wang S, Zhang Y, Li Y. Sensitive colorimetric detection of K(I) using catalytically active gold nanoparticles triggered signal amplification. Biosens Bioelectron 2016; 79:749-57. [PMID: 26774090 DOI: 10.1016/j.bios.2015.12.110] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 12/29/2015] [Accepted: 12/31/2015] [Indexed: 10/22/2022]
Abstract
In this work, we report a simple, ultrasensitive, and feasible colorimetric assay for metal ion (K(+), used as a model) via inherent peroxidase-like enzymatic amplification strategy of gold nanoparticles (AuNPs). It is shown that peroxidase-like activity of AuNPs can be improved dramatically by its surface activation with target-specific aptamer molecules. Whereas when the target exists, the aptamers leave the surface of AuNPs in a target concentration-dependent manner, resulting in a decrease of the nanoenzymatic catalytic ability of AuNPs. Thus, K(+) can be quantified in the presence of AuNPs by using a colorimetric sensing probe (3,3',5,5'-tetramethylbenzidine). The color change of the solution is relevant to the dose of the target, and this can be achieved with the naked eyes and monitored by UV-vis spectrometry. A linear dependence between the absorbance and target K(+) concentration is obtained under optimal conditions in the range from 0. 1 nM to 1 μM with a detection limit (LOD) of 0.06 nM estimated at the 3Sblank level. The sensitivity displays to be 2-9 orders of magnitude better than those of other K(+) detection methods. This sensing strategy may in principle be universally applicable for the detection of a range of environmental or biomedical molecules of interest.
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Affiliation(s)
- Zhengbo Chen
- Department of Chemistry, Capital Normal University, Beijing, 100048, China.
| | - Lulu Tan
- Department of Chemistry, Capital Normal University, Beijing, 100048, China; College of Resources Environment and Tourism, Capital Normal University, Beijing, 100048, China
| | - Shaoxiong Wang
- Department of Chemistry, Capital Normal University, Beijing, 100048, China
| | - Yimeng Zhang
- Department of Chemistry, Capital Normal University, Beijing, 100048, China
| | - Yonghui Li
- Department of Hematology, Chinese PLA General Hospital, Beijing, 100853, China.
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Wang W, Kang TS, Chan PWH, Lu JJ, Chen XP, Leung CH, Ma DL. A label-free G-quadruplex-based mercury detection assay employing the exonuclease III-mediated cleavage of T-Hg 2+-T mismatched DNA. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2015; 16:065004. [PMID: 27877846 PMCID: PMC5069990 DOI: 10.1088/1468-6996/16/6/065004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 11/03/2015] [Accepted: 11/04/2015] [Indexed: 05/30/2023]
Abstract
We report herein the use of an exonuclease III and G-quadruplex probe to construct a G-quadruplex-based luminescence detection platform for Hg2+. Unlike common DNA-based Hg2+ detection methods, when using the dsDNA probe to monitor the hairpin formation, the intercalation of the dsDNA probe may be influenced by the distortion of dsDNA. This 'mix-and-detect' methodology utilized the G-quadruplex probe as the signal transducer and is simple, rapid, convenient to use and can detect down to 20 nM of Hg2+.
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Affiliation(s)
- Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Philip Wai Hong Chan
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
| | - Jin-Jian Lu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Xiu-Ping Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - 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, Kowloon Tong, Hong Kong, China
- Partner State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong, China
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16
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Leung KH, He B, Yang C, Leung CH, Wang HMD, Ma DL. Development of an Aptamer-Based Sensing Platform for Metal Ions, Proteins, and Small Molecules through Terminal Deoxynucleotidyl Transferase Induced G-Quadruplex Formation. ACS APPLIED MATERIALS & INTERFACES 2015; 7:24046-52. [PMID: 26449329 DOI: 10.1021/acsami.5b08314] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report a label-free, structure-independent luminescent-sensing platform for metal ions, proteins, and small molecules utilizing an Ir(III) complex, terminal deoxynucleotidyl transferase (TdT), and a structure-folding aptamer. A novel G-quadruplex-selective Ir(III) complex was identified to detect the nascent G-quadruplex motifs with an enhanced luminescence response. Unlike most label-free DNA-based assays reported in the literature, this sensing platform does not require a specific secondary structure of aptamer, thus greatly simplifying DNA design. The detection platform was demonstrated by the detection of K(+) ions, thrombin, and cocaine as representative examples of metal ions, proteins, and small molecules.
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Affiliation(s)
| | | | - Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao, China
| | - Hui-Min David Wang
- Graduate Institute of Natural Products, Kaohsiung Medical University , Kaohsiung 807, Taiwan
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17
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Chan K, Chung CY, Yam VW. Conjugated Polyelectrolyte‐Induced Self‐Assembly of Alkynylplatinum(II) 2,6‐Bis(benzimidazol‐2′‐yl)pyridine Complexes. Chemistry 2015; 21:16434-47. [DOI: 10.1002/chem.201501804] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Kevin Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China)
| | - Clive Yik‐Sham Chung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China)
| | - Vivian Wing‐Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China)
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18
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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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19
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Li L, Wen Y, Xu L, Xu Q, Song S, Zuo X, Yan J, Zhang W, Liu G. Development of mercury (II) ion biosensors based on mercury-specific oligonucleotide probes. Biosens Bioelectron 2015; 75:433-45. [PMID: 26356764 DOI: 10.1016/j.bios.2015.09.003] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 08/21/2015] [Accepted: 09/01/2015] [Indexed: 10/23/2022]
Abstract
Mercury (II) ion (Hg(2+)) contamination can be accumulated along the food chain and cause serious threat to the public health. Plenty of research effort thus has been devoted to the development of fast, sensitive and selective biosensors for monitoring Hg(2+). Thymine was demonstrated to specifically combine with Hg(2+) and form a thymine-Hg(2+)-thymine (T-Hg(2+)-T) structure, with binding constant even higher than T-A Watson-Crick pair in DNA duplex. Recently, various novel Hg(2+) biosensors have been developed based on T-rich Mercury-Specific Oligonucleotide (MSO) probes, and exhibited advanced selectivity and excellent sensitivity for Hg(2+) detection. In this review, we explained recent development of MSO-based Hg(2+) biosensors mainly in 3 groups: fluorescent biosensors, colorimetric biosensors and electrochemical biosensors.
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Affiliation(s)
- Lanying Li
- Laboratory of Biometrology, Division of Chemistry and Ionizing Radiation Measurement Technology, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, PR China
| | - Yanli Wen
- Laboratory of Biometrology, Division of Chemistry and Ionizing Radiation Measurement Technology, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, PR China
| | - Li Xu
- Laboratory of Biometrology, Division of Chemistry and Ionizing Radiation Measurement Technology, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, PR China
| | - Qin Xu
- Laboratory of Biometrology, Division of Chemistry and Ionizing Radiation Measurement Technology, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, PR China
| | - Shiping Song
- Laboratory of Physical Biology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Xiaolei Zuo
- Laboratory of Physical Biology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, PR China
| | - Juan Yan
- College of Food Science and Technology, Shanghai Ocean University, 999 Hucheng Huan Road, Pudong District, Shanghai 201306, PR China.
| | - Weijia Zhang
- College of Food Science and Technology, Shanghai Ocean University, 999 Hucheng Huan Road, Pudong District, Shanghai 201306, PR China
| | - Gang Liu
- Laboratory of Biometrology, Division of Chemistry and Ionizing Radiation Measurement Technology, Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, PR China
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20
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Wang M, He B, Lu L, Leung CH, Mergny JL, Ma DL. Label-free luminescent detection of LMP1 gene deletion using an intermolecular G-quadruplex-based switch-on probe. Biosens Bioelectron 2015; 70:338-44. [DOI: 10.1016/j.bios.2015.03.047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 03/14/2015] [Accepted: 03/20/2015] [Indexed: 12/27/2022]
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21
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Lin S, Gao W, Tian Z, Yang C, Lu L, Mergny JL, Leung CH, Ma DL. Luminescence switch-on detection of protein tyrosine kinase-7 using a G-quadruplex-selective probe. Chem Sci 2015; 6:4284-4290. [PMID: 29218197 PMCID: PMC5707507 DOI: 10.1039/c5sc01320h] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 05/17/2015] [Indexed: 12/22/2022] Open
Abstract
A series of luminescent iridium(iii) complexes were synthesised and evaluated for their ability to act as luminescent G-quadruplex-selective probes. The iridium(iii) complex 9 [Ir(pbi)2(5,5-dmbpy)]PF6 (where pbi = 2-phenyl-1H-benzo[d]imidazole; 5,5-dmbpy = 5,5'-dimethyl-2,2'-bipyridine) exhibited high luminescence for G-quadruplex DNA compared to dsDNA and ssDNA, and was employed to construct a G-quadruplex-based assay for protein tyrosine kinase-7 (PTK7) in aqueous solution. PTK7 is an important biomarker for a range of leukemias and solid tumors. In the presence of PTK7, the specific binding of the sgc8 aptamer sequence triggers a structural transition and releases the G-quadruplex-forming sequence. The formation of the nascent G-quadruplex structure is then detected by the G-quadruplex-selective iridium(iii) complex with an enhanced luminescent response. Moreover, the application of the assay for detecting PTK7 in cellular debris and membrane protein extract was demonstrated. To our knowledge, this is the first G-quadruplex-based assay for PTK7.
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Affiliation(s)
- Sheng Lin
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China .
| | - Wei Gao
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China .
| | - Zeru Tian
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China .
| | - Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences , University of Macau , Macao , China .
| | - Lihua Lu
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China .
| | - Jean-Louis Mergny
- University of Bordeaux , ARNA Laboratory , Bordeaux , France .
- INSERM , U869 , IECB , Pessac , France
| | - 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 , Kowloon Tong , Hong Kong , China .
- Partner State Key Laboratory of Environmental and Biological Analysis , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China
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22
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Chen Z, Tan L, Hu L, Luan Y. Superior fluorescent probe for detection of potassium ion. Talanta 2015; 144:247-51. [PMID: 26452817 DOI: 10.1016/j.talanta.2015.06.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 05/31/2015] [Accepted: 06/05/2015] [Indexed: 12/27/2022]
Abstract
Here, a simple, and highly sensitive fluorescent assay is designed to monitor K(+). The versatile, robust biosensing strategy is based on the specific recognition utility of label-free aptamers with their targets and PicoGreen dye as the signal probe. The aptamers undergo a conformational change to a secondary structure such as G-quadruplex in the presence of targets. In addition to a conformational change with its targets, the remaining single-stranded DNA (ssDNA) aptamer form a duplex structure with its complete complementary sequence. Conformational changes of aptamers as well as fluorescence amplification produce clear signal-off in the presence of targets. Fluorescent assay employing this mechanism for the detection of K(+) is highly sensitive, and selective. The detection limit of the K(+) assay is determined to be 2.37 pM. The sensing strategy is low-cost and simple in its operation without requirement for complex labeling of probe DNA or sophisticated synthesis of the fluorescent compound. Also, the method has less structural requirement of complexes of aptamers with their targets, thus rending its wilder applications for various targets.
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Affiliation(s)
- Zhengbo Chen
- Department of Chemistry, Capital Normal University, Beijing 100048, China.
| | - Lulu Tan
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Liangyu Hu
- Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Yunxia Luan
- Beijing Research Center for Agricultural Standards and Testing, Beijing 100097, China
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23
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Guo Y, Chen Y, Wei Y, Li H, Dong C. Label-free fluorescent aptasensor for potassium ion using structure-switching aptamers and berberine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt C:1635-1641. [PMID: 25459726 DOI: 10.1016/j.saa.2014.10.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 10/09/2014] [Accepted: 10/12/2014] [Indexed: 06/04/2023]
Abstract
A simple, rapid and label-free fluorescent aptasensor was fabricated for the detection of potassium ion (K(+) ion) in aqueous solution using K(+) ion-stabilized single stranded DNA (ssDNA) with G-rich sequence as the recognition element and a fluorescent dye, berberine, as the fluorescence probe. In the presence of K(+) ion, the G-rich ssDNA is promoted to form the aptamer-target complex with a G-quadruplex conformation, and berberine binding to the G-quadruplex structure results in the enhancement of its fluorescence. The fluorescence intensity of the sensing system displayed a calibration response for K(+) ion in the range of 0-1600μM with a detection limit of 31nM (S/N=3) and a relative standard deviation (RSD) of 0.45%. This label-free fluorescence aptasensor is conveniently and effectively applicable for analysis of K(+) ion in blood serum samples with the recovery range of 81.7-105.3%. The assay for detection of potassium ion is easy, economical, robust, and stable in rough conditions.
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Affiliation(s)
- Yanqing Guo
- Department of Chemistry, Jinzhong University, Jinzhong, Shanxi 030600, PR China; Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, PR China
| | - Yanxia Chen
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, PR China
| | - Yanli Wei
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, PR China.
| | - Huanhuan Li
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, PR China
| | - Chuan Dong
- Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, PR China.
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24
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Ren J, Wang T, Wang E, Wang J. Versatile G-quadruplex-mediated strategies in label-free biosensors and logic systems. Analyst 2015; 140:2556-72. [DOI: 10.1039/c4an02282c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review addresses how G-quadruplex (G4)-mediated biosensors convert the events of target recognition into a measurable physical signal. The application of label-free G4-strategies in the construction of logic systems is also discussed.
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Affiliation(s)
- Jiangtao Ren
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Tianshu Wang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Jin Wang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
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25
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Ma DL, Lin S, Lu L, Wang M, Hu C, Liu LJ, Ren K, Leung CH. G-quadruplex-based logic gates for HgII and AgI ions employing a luminescent iridium(iii) complex and extension of metal-mediated base pairs by polymerase. J Mater Chem B 2015; 3:4780-4785. [DOI: 10.1039/c5tb00718f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report herein the synthesis of a series of cyclometallated iridium(iii) complexes as luminescent G-quadruplex-selective probes to construct AND, OR and INHIBIT logic gates for the detection of HgII and AgI ions.
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Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
- Partner State Key Laboratory of Environmental and Biological Analysis
| | - Sheng Lin
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Lihua Lu
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Modi Wang
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Chong Hu
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Li-Juan Liu
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - Kangning Ren
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
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26
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Wang C, Tang Y, Guo Y. Adenosine deaminase biosensor combining cationic conjugated polymer-based FRET with deoxyguanosine-based photoinduced electron transfer. ACS APPLIED MATERIALS & INTERFACES 2014; 6:21686-21691. [PMID: 25360869 DOI: 10.1021/am506832y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrated a sensitive and selective adenosine deaminase (ADA) detection by modulating the fluorescence resonance energy transfer (FRET) between cationic conjugated poly(9,9-bis(6'-N,N,N-trimethylammonium) hexyl)fluorine phenylene) (PFP) and the deoxyguanosine-tailored hairpin aptamer. The hairpin aptamer was labeled with a fluorophore FAM at one end and three deoxyguanosines (Gs) at the other end as a quencher. In the absence of ADA, aptamer forms hairpin-like conformation with adenosines making close affinity of Gs and FAM, which results in the weak FRET from PFP to FAM because of FAM fluorescence being quenched by Gs via photoinduced electron transfer (PET). After addition of ADA, adenosine was hydrolyzed by ADA, followed by the release of free aptamer. In this case, FAM being far away from Gs, the strong FRET thus was obtained due to the quenching process being blocked. Therefore, the new strategy based on the FRET ratio enhancement is reasonably used to detect the ADA sensitively, combining the fluorescence signal amplification of conjugated polymers with the initiative signal decreasing by Gs. The detection limit of the ADA assay is 0.3 U/L in both buffer solution and human serum, which is more sensitive than most of those previously documented methods. Importantly, the assay is rapid, homogeneous, and simple without a complicated treating process. The ADA inhibitor, erythro-9-(2-hydroxy-3-nonyl) adenine hydrochloride (EHNA), was also studied based on this assay, and the detection limit of EHNA is 10 pM. This strategy provides a new platform for the detection of other biomolecules and enzymes.
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Affiliation(s)
- Chun Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University , Xi'an 710062, P. R. China
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27
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Zhou R, Xu C, Dong J, Wang G. Labeling-free fluorescent detection of DNA hybridization through FRET from pyrene excimer to DNA intercalator SYBR green I. Biosens Bioelectron 2014; 65:103-7. [PMID: 25461145 DOI: 10.1016/j.bios.2014.10.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/08/2014] [Accepted: 10/13/2014] [Indexed: 01/22/2023]
Abstract
A novel labeling-free fluorescence complex probe has been developed for DNA hybridization detection based on fluorescence resonance energy transfer (FRET) mechanism from pyrene excimer of pyrene-functionalized poly [2-(N, N-dimethylamino) ethyl methacrylate] (PFP) to SYBR Green I (SG, a specific intercalator of double-stranded DNA) in a cost-effective, rapid and simple manner. The complex probe consists of the positively charged PFP, SG and negatively charged single-stranded DNA (ssDNA). Upon adding a complementary strand to the complex probe solution, double-stranded DNA (dsDNA) was formed, followed by the intercalation of SG into dsDNA. The pyrene excimer emission was overlapped with the absorption of SG very well and the electrostatic interactions between PFP and dsDNA kept them in close proximity, enabling efficient FRET from pyrene excimer to SG. The fluorescence of SG in the duplex DNA resulting from FRET can be successfully applied to detect DNA hybridization with high sensitivity for a very low detection limit of 10nM and excellent selectivity for detection of single base pair mismatch.
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Affiliation(s)
- Ruyi Zhou
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Chen Xu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jie Dong
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Guojie Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
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28
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Xu C, Zhou R, Zhang R, Yang L, Wang G. Label-Free DNA Sequence Detection through FRET from a Fluorescent Polymer with Pyrene Excimer to SG. ACS Macro Lett 2014; 3:845-848. [PMID: 35596346 DOI: 10.1021/mz500378c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A label-free complex probe composed of a water-soluble fluorescent pyrene-functionalized polymer, ssDNA, and a nucleic acid stain (SG) is presented here, which can detect DNA sequence via FRET from pyrene excimer to SG. Complementary and one-base mismatched strands at nanomolar concentrations can be distinguished by the examination of the FRET fluorescence intensity of SG. This novel strategy for detecting DNA using the fluorescent pyrene-functionalized polymer not only affords a simple label-free method to detect nucleic acid sequence but also endows the detection with high sensitivity and selectivity, which may find wide applications for optical biosensing.
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Affiliation(s)
- Chen Xu
- School
of Materials Science
and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ruyi Zhou
- School
of Materials Science
and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ruichen Zhang
- School
of Materials Science
and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Lingye Yang
- School
of Materials Science
and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Guojie Wang
- School
of Materials Science
and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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29
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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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30
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Shen J, Li Y, Gu H, Xia F, Zuo X. Recent development of sandwich assay based on the nanobiotechnologies for proteins, nucleic acids, small molecules, and ions. Chem Rev 2014; 114:7631-77. [PMID: 25115973 DOI: 10.1021/cr300248x] [Citation(s) in RCA: 199] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Juwen Shen
- Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST) , Wuhan 430074, China
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31
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Combination of conjugated polyelectrolytes and biomolecules: A new optical platform for highly sensitive and selective chemo- and biosensors. Macromol Res 2014. [DOI: 10.1007/s13233-014-2080-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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32
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DNAzyme self-assembled gold nanorods-based FRET or polarization assay for ultrasensitive and selective detection of copper(II) ion. Biosens Bioelectron 2014; 55:285-8. [DOI: 10.1016/j.bios.2013.12.032] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 12/03/2013] [Accepted: 12/11/2013] [Indexed: 01/07/2023]
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33
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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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34
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Chang Z, Zang Y, Chen C, He P, Fang Y. Determination of DNA and Thrombin by an Electrochemical Sensor Employing Aggregation of Crosslinked Gold Nanoparticles and Aptamer Segments. ANAL LETT 2013. [DOI: 10.1080/00032719.2013.832271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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35
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Leung KH, He HZ, Wang W, Zhong HJ, Chan DSH, Leung CH, Ma DL. Label-free luminescent switch-on detection of endonuclease IV activity using a G-quadruplex-selective iridium(III) complex. ACS APPLIED MATERIALS & INTERFACES 2013; 5:12249-12253. [PMID: 24245499 DOI: 10.1021/am404314p] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report herein the synthesis and application of a novel G-quadruplex-selective luminescent iridium(III) complex [Ir(ppy)2(bcp)](+) (where ppy = 2-phenylpyridine and bcp = 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) for the sensitive detection of apurinic/apyrimidinic (AP) endonuclease activity. Using endonuclease IV (Endo IV) as a model enzyme, a duplex DNA substrate containing a G-quadruplex-forming sequence is cleaved by Endo IV at the abasic site. This releases the G-quadruplex sequence, which folds into a G-quadruplex and is recognised by the G-quadruplex-selective iridium(III) complex with an enhanced luminescence response. The assay achieved high sensitivity and selectivity for Endo IV over other tested enzymes.
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Affiliation(s)
- Ka-Ho Leung
- Department of Chemistry, Hong Kong Baptist University , Kowloon Tong, Hong Kong, China
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36
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Mahesh Kumar J, Idris MM, Srinivas G, Vinay Kumar P, Meghah V, Kavitha M, Reddy CR, Mainkar PS, Pal B, Chandrasekar S, Nagesh N. Phenyl 1,2,3-triazole-thymidine ligands stabilize G-quadruplex DNA, inhibit DNA synthesis and potentially reduce tumor cell proliferation over 3'-azido deoxythymidine. PLoS One 2013; 8:e70798. [PMID: 23976957 PMCID: PMC3747139 DOI: 10.1371/journal.pone.0070798] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Accepted: 06/24/2013] [Indexed: 01/10/2023] Open
Abstract
Triazoles are known for their non-toxicity, higher stability and therapeutic activity. Few nucleoside (L1, L2 and L3) and non-nucleoside 1,2,3-triazoles (L4-L14) were synthesised using click chemistry and they were screened for tumor cell cytotoxicity and proliferation. Among these triazole ligands studied, nucleoside ligands exhibited higher potential than non-nucleoside ligands. The nucleoside triazole analogues, 3'-Phenyl-1,2,3- triazole-thymidine (L2) and 3'-4-Chlorophenyl-1,2,3-triazole-thymidine (L3), demonstrated higher cytotoxicity in tumor cells than in normal cells. The IC₅₀ value for L3 was lowest (50 µM) among the ligands studied. L3 terminated cell cycle at S, G2/M phases and enhanced sub-G1 populations, manifesting induction of apoptosis in tumor cells. Confocal studies indicated that nucleoside triazole ligands (L2/L3) cause higher DNA fragmentation than other ligands. Preclinical experiments with tumor-induced mice showed greater reduction in tumor size with L3. In vitro DNA synthesis reaction with L3 exhibited higher DNA synthesis inhibition with quadruplex forming DNA (QF DNA) than non quadruplex forming DNA (NQF DNA). T(m) of quadruplex DNA increased in the presence of L3, indicating its ability to enhance stability of quadruplex DNA at elevated temperature and the results indicate that it had higher affinity towards quadruplex DNA than the other forms of DNA (like dsDNA and ssDNA). From western blot experiment, it was noticed that telomerase expression levels in the tissues of tumor-induced mice were found to be reduced on L3 treatment. Microcalorimetry results emphasise that two nucleoside triazole ligands (L2/L3) interact with quadruplex DNA with significantly higher affinity (K(d)≈10⁻⁷ M). Interestingly the addition of an electronegative moiety to the phenyl group of L2 enhanced its anti-proliferative activity. Though IC₅₀ values are not significantly low with L3, the studies on series of synthetic 1,2,3-triazole ligands are useful for improving and building potential pro-apoptotic ligands.
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Affiliation(s)
| | | | - Gunda Srinivas
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | | | | | - Mitta Kavitha
- CSIR-Indian Institute of Chemical Technology, Hyderabad, India
| | | | | | - Biswajit Pal
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | | | - Narayana Nagesh
- CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
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Quach QH, Jung J, Kim H, Chung BH. A simple, fast and highly sensitive assay for the detection of telomerase activity. Chem Commun (Camb) 2013; 49:6596-8. [DOI: 10.1039/c3cc42571a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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38
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Chung CYS, Yam VWW. Selective label-free detection of G-quadruplex structure of human telomere by emission spectral changes in visible-and-NIR region under physiological condition through the FRET of a two-component PPE-SO3−–Pt(ii) complex ensemble with Pt⋯Pt, electrostatic and π–π interactions. Chem Sci 2013. [DOI: 10.1039/c2sc20897k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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39
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Kim B, Jung IH, Kang M, Shim HK, Woo HY. Cationic conjugated polyelectrolytes-triggered conformational change of molecular beacon aptamer for highly sensitive and selective potassium ion detection. J Am Chem Soc 2012; 134:3133-8. [PMID: 22280349 DOI: 10.1021/ja210360v] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We demonstrate highly sensitive and selective potassium ion detection against excess sodium ions in water, by modulating the interaction between the G-quadruplex-forming molecular beacon aptamer (MBA) and cationic conjugated polyelectrolyte (CPE). The K(+)-specific aptamer sequence in MBA is used as the molecular recognition element, and the high binding specificity of MBA for potassium ions offers selectivity against a range of metal ions. The hairpin-type MBA labeled with a fluorophore and quencher at both termini undergoes a conformational change (by complexation with CPEs) to either an open-chain form or a G-quadruplex in the absence or presence of K(+) ions. Conformational changes of MBA as well as fluorescence (of the fluorophore in MBA) quenching or amplification via fluorescence resonance energy transfer from CPEs provide clear signal turn-off and -on in the presence or absence of K(+). The detection limit of the K(+) assays is determined to be ~1.5 nM in the presence of 100 mM Na(+) ions, which is ~3 orders of magnitude lower than those reported previously. The successful detection of 5'-adenosine triphosphate (ATP) with the MBA containing an ATP-specific aptamer sequence is also demonstrated using the same sensor scheme. The scheme reported herein is applicable to the detection of other kinds of G-rich aptamer-binding chemicals and biomolecules.
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Affiliation(s)
- Boram Kim
- Department of Nano Fusion Technology, Pusan National University, Miryang 627-706, Republic of Korea
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Sun H, Xiang J, Li Q, Liu Y, Li L, Shang Q, Xu G, Tang Y. Recognize three different human telomeric G-quadruplex conformations by quinacrine. Analyst 2012; 137:862-7. [PMID: 22223064 DOI: 10.1039/c2an15870a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Recognition of different human telomeric G-quadruplex structures has been a very important task for developing anti-cancer drug design. However, it also is a very challenging question since multiple conformational isomers of telomeric G-quadruplexes coexist under some conditions. Here, three different conformations including parallel, antiparallel, and mixed-type telomeric G-quadruplex structures have been well recognized by quinacrine (QNA) through monitoring its absorption, fluorescence, and fluorescence lifetime spectra. The multiple structures of H22 G-quadruplexes under physiological K(+) conditions could also be easily determined to coexist as mixed-type and antiparallel G-quadruplexes. The recognition mechanism based on the different binding affinity and binding sites has been further elucidated by association with the nuclear magnetic resonance (NMR) results.
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Affiliation(s)
- Hongxia Sun
- National Laboratory for Molecular Sciences, Center for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190, PR China
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41
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Visualizing the Quadruplex: From Fluorescent Ligands to Light-Up Probes. Top Curr Chem (Cham) 2012; 330:111-77. [DOI: 10.1007/128_2012_346] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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42
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Fan X, Li H, Zhao J, Lin F, Zhang L, Zhang Y, Yao S. A novel label-free fluorescent sensor for the detection of potassium ion based on DNAzyme. Talanta 2011; 89:57-62. [PMID: 22284459 DOI: 10.1016/j.talanta.2011.11.056] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Revised: 11/16/2011] [Accepted: 11/20/2011] [Indexed: 12/13/2022]
Abstract
A novel label-free and sensitive fluorescent aptasensor for the detection of potassium ion (K(+)) was developed based on the horseradish peroxidase-mimicking DNAzyme (HRP-DNAzyme). In this work, we selected a K(+)-stabilized single stranded DNA (ssDNA) with G-rich sequence as the recognition element. In the presence of K(+), the G-rich DNA folded into the G-quadruplex structure, and then hemin can bind to the G-quadruplex structure as a co-factor and form HRP-DNAzyme. 3-(p-Hydroxyphenyl)-propanoic acid (HPPA) can be oxidized by H(2)O(2) into a fluorescent product in the presence of DNAzyme. The fluorescence intensity of the HPPA oxidative product increased with the K(+) concentration. Under the optimal conditions, the fluorescence intensity was linearly related to the logarithm of K(+) concentration in the range of 2.5 μM to 5mM. Other metal ions, such as Na(+), Li(+), NH(4)(+), Mg(2+) and Ca(2+) caused no notable interference on the detection of K(+).
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Affiliation(s)
- Xiaoyu Fan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
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Kamkaew A, Barhoumi R, Burghardt RC, Burgess K. Cationic polyfluorenes for intracellular delivery of proteins. Org Biomol Chem 2011; 9:6513-8. [PMID: 21845277 DOI: 10.1039/c1ob05874f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two cationic polyfluorene derivatives, quaternary amine 1 and guanidine 2 sheathed systems, were prepared as potential carriers to mediate import of proteins into cells without requiring covalent attachment to the protein. Neither polymer showed significant cytotoxicities (IC(50) 100 μM) when exposed to Clone 9 rat liver cells. Both polymers were shown to mediate import of a series of four proteins chosen because they have different pI values, sizes, and variable organic fluor attachments. Once inside the cells, the quaternary amine system 1 released more of its cargo into regions outside the lysosomes. In one exploratory experiment, pyrenebutyrate was shown to accelerate import of a protein system by polymer 1.
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Affiliation(s)
- Anyanee Kamkaew
- Department of Chemistry, Texas A&M University, Box 30012, College Station, TX 77841, USA
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Wang L, Jin Y, Deng J, Chen G. Gold nanorods-based FRET assay for sensitive detection of Pb2+ using 8-17DNAzyme. Analyst 2011; 136:5169-74. [DOI: 10.1039/c1an15783c] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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