51
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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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52
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Liu JB, Liu LJ, Dong ZZ, Yang GJ, Leung CH, Ma DL. An Aldol Reaction-Based Iridium(III) Chemosensor for the Visualization of Proline in Living Cells. Sci Rep 2016; 6:36509. [PMID: 27812033 PMCID: PMC5095674 DOI: 10.1038/srep36509] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 10/17/2016] [Indexed: 01/16/2023] Open
Abstract
A long-lived aldol reaction-based iridium(III) chemosensor [Ir(ppy)2(5-CHOphen)]PF6 (1, where ppy = 2-phenylpyridine and 5-CHOphen = 1,10-phenanthroline-5-carbaldehyde) for proline detection has been synthesized. The iridium(III) complex 1, incorporating an aldehyde group in N^N donor ligand, can take part in aldol reaction with acetone mediated by proline. The transformation of the sp2-hybridized carbonyl group into a sp3-hybridized alcohol group influences the metal-to-ligand charge-transfer (MLCT) state of the iridium(III) complex, resulting in a change in luminescence in response to proline. The interaction of the iridium(III) complex 1 with proline was investigated by 1H NMR, HRMS and emission titration experiments. Upon the addition of proline to a solution of iridium(III) complex 1, a maximum 8-fold luminescence enhancement was observed. The luminescence signal of iridium(III) complex 1 could be recognized in strongly fluorescent media using time-resolved emission spectroscopy (TRES). The detection of proline in living cells was also demonstrated.
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Affiliation(s)
- Jin-Biao Liu
- Department of Chemistry, Jiangxi University of Science and Technology, Ganzhou, China
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Li-Juan Liu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Zhen-Zhen Dong
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Guan-Jun 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
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
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53
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Lu L, Mao Z, Kang TS, Leung CH, Ma DL. A versatile nanomachine for the sensitive detection of platelet-derived growth factor-BB utilizing a G-quadruplex-selective iridium(III) complex. Biosens Bioelectron 2016; 85:300-309. [DOI: 10.1016/j.bios.2016.05.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/13/2016] [Accepted: 05/02/2016] [Indexed: 12/28/2022]
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54
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Detection of biotin-streptavidin interactions via terminal protection of small molecule linked DNA and the formation of fluorescent DNA-templated silver nanoclusters. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1968-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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55
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Zhou Y, Jia J, Wang X, Guo W, Wu Z, Xu N. Protein Staining Agents from Cationic and Neutral Luminescent Iridium(III) Complexes. Chemistry 2016; 22:16796-16800. [DOI: 10.1002/chem.201603630] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Yuyang Zhou
- Jiangsu Key Laboratory of Environmental Functional Materials; School of Chemistry, Biology and Material Engineering; Suzhou University of Science and Technology, Suzhou; 215009 Jiangsu P. R. China
| | - Junli Jia
- Department of Immunology; Nanjing Medical University, Nanjing; 211166 Jiangsu P. R. China
| | - Xiaomei Wang
- Jiangsu Key Laboratory of Environmental Functional Materials; School of Chemistry, Biology and Material Engineering; Suzhou University of Science and Technology, Suzhou; 215009 Jiangsu P. R. China
| | - Weiqiang Guo
- Jiangsu Key Laboratory of Environmental Functional Materials; School of Chemistry, Biology and Material Engineering; Suzhou University of Science and Technology, Suzhou; 215009 Jiangsu P. R. China
| | - Zhengying Wu
- Jiangsu Key Laboratory of Environmental Functional Materials; School of Chemistry, Biology and Material Engineering; Suzhou University of Science and Technology, Suzhou; 215009 Jiangsu P. R. China
| | - Nan Xu
- Jiangsu Key Laboratory of Environmental Functional Materials; School of Chemistry, Biology and Material Engineering; Suzhou University of Science and Technology, Suzhou; 215009 Jiangsu P. R. China
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56
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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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57
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Lin JH, Tseng WB, Lin KC, Lee CY, Chandirasekar S, Tseng WL, Hsieh MM. Oligonucleotide-Based Fluorescent Probe for Sensing of Cyclic Diadenylate Monophosphate in Bacteria and Diadenosine Polyphosphates in Human Tears. ACS Sens 2016. [DOI: 10.1021/acssensors.6b00425] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jia-Hui Lin
- Department
of Chemistry, National Sun Yat-sen University, Kaohsiung City, Taiwan 804
| | - Wei-Bin Tseng
- Department
of Chemistry, National Kaohsiung Normal University, Kaohsiung City, Taiwan 802
| | - Kai-Cheng Lin
- Department
of Orthopaedics, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan 813
| | - Chih-Yi Lee
- Department
of Chemistry, National Sun Yat-sen University, Kaohsiung City, Taiwan 804
| | | | - Wei-Lung Tseng
- Department
of Chemistry, National Sun Yat-sen University, Kaohsiung City, Taiwan 804
- School
of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung City, Taiwan 807
| | - Ming-Mu Hsieh
- Department
of Chemistry, National Kaohsiung Normal University, Kaohsiung City, Taiwan 802
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58
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Lin S, Lu L, Liu JB, Liu C, Kang TS, Yang C, Leung CH, Ma DL. A G-quadruplex-selective luminescent iridium(III) complex and its application by long lifetime. Biochim Biophys Acta Gen Subj 2016; 1861:1448-1454. [PMID: 27592730 DOI: 10.1016/j.bbagen.2016.08.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 08/27/2016] [Accepted: 08/30/2016] [Indexed: 01/05/2023]
Abstract
BACKGROUND The G-quadruplex motif has been widely used for the construction of analytical detection platforms due to its rich structural polymorphism and flexibility. Luminescent assays are often limited due to the interference from endogenous fluorophores in biological samples. METHODS To address this challenge, a novel long lifetime iridium(III) complex 1 was synthesized and used to construct a G-quadruplex-based assay for detecting prostate specific antigen (PSA) in aqueous solution. PSA is a common biomarker in serum and used as a model for demonstration in this work. RESULTS The PSA assay has achieved a detection limit of 40.8pg·mL-1, and shows high selectivity towards PSA over other proteins. Additionally, the assay could function in diluted human serum by using time-resolved luminescent spectroscopy, with good linearity from 1 to 10ng·mL-1 of PSA, which is adequate to detect the PSA levels for physiological (<4ng·mL-1) and clinical (4-10ng·mL-1) applications. CONCLUSIONS The assay was successfully constructed. As revealed from time-resolved method, the long lifetime property of iridium(III) complex 1 plays an important role in distinguishing phosphorescence signals from short-life auto-fluorescence of human serum. GENERAL SIGNIFICANCE Luminescent transition metal complexes offer several advantages over other widely used organic fluorophores, such as long phosphorescence lifetime, large Stokes shift and modular syntheses. In addition, the assay could work effectively in diluted human serum using time-resolved luminescent spectroscopy, it therefore could be potentially developed to monitor PSA in biological samples. This article is part of a Special Issue entitled "G-quadruplex" Guest Editor: Dr. Concetta Giancola and Dr. Daniela Montesarchio.
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Affiliation(s)
- Sheng Lin
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Lihua Lu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China; College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, China
| | - Jin-Biao Liu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Chenfu Liu
- 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
| | - 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.
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
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59
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Gajera SB, Mehta JV, Patel MN. Design of Multifunctional IridiumIIICompounds as a Potential Therapeutic Agents from Basic Molecular Scaffolds. ChemistrySelect 2016. [DOI: 10.1002/slct.201600882] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Sanjay B. Gajera
- Department of Chemistry; Sardar Patel University; Vallabh Vidyanagar-388 120 Gujarat, India
| | - Jugal V. Mehta
- Department of Chemistry; Sardar Patel University; Vallabh Vidyanagar-388 120 Gujarat, India
| | - Mohan N. Patel
- Department of Chemistry; Sardar Patel University; Vallabh Vidyanagar-388 120 Gujarat, India
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60
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Whole cell based microcontact imprinted capacitive biosensor for the detection of Escherichia coli. Biosens Bioelectron 2016; 87:807-815. [PMID: 27657842 DOI: 10.1016/j.bios.2016.08.096] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/26/2016] [Accepted: 08/28/2016] [Indexed: 01/30/2023]
Abstract
In this study, a label-free, selective and sensitive microcontact imprinted capacitive biosensor was developed for the detection of Escherichia coli. The recognition of E. coli was successfully performed by this sensor prepared with the combination of microcontact imprinting method and capacitive biosensor technology. After preparation of bacterial stamps, microcontact-E. coli imprinted gold electrodes were generated using an amino acid based recognition element, N-methacryloyl-L-histidine methylester (MAH), 2-Hydroxyethyl methacrylate (HEMA) as monomers and ethyleneglycol dimethacrylate (EGDMA) as crosslinker under UV-polymerization. Real-time E. coli detection experiments were carried out within the range of 1.0×102-1.0×107CFU/mL. The unique combination of these two techniques provides selective detection with a detection limit of 70CFU/mL. The designed capacitive sensor has high selectivity and was able to distinguish E. coli when present together with competing bacterial strains which are known to have similar shape. In addition, the prepared sensor has the ability to detect E. coli with a recovery of 81-97% in e.g. river water.
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61
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Zhang S, Wang K, Huang C, Li Z, Sun T, Han DM. An enzyme-free and resettable platform for the construction of advanced molecular logic devices based on magnetic beads and DNA. NANOSCALE 2016; 8:15681-15688. [PMID: 27524500 DOI: 10.1039/c6nr04762a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A series of multiple logic circuits based on magnetic beads and DNA are constructed to perform resettable nonarithmetic functions, including a digital comparator, 4-to-2 encoder and 2-to-3 decoder, 2-to-1 encoder and 1-to-2 decoder. The signal reporter is composed of a G-quadruplex/NMM complex and a AuNP-surface immobilized molecular beacon. It is the first time that the designed DNA-based nonarithmetic nanodevices can share the same DNA platform with a reset function, which has great potential application in information processing at the molecular level. Another novel feature of the designed system is that the developed nanodevices are operated on a simple DNA/magnetic bead platform and share a constant threshold setpoint without the assistance of any negative logic conversion. The reset function is realized by heating the output system and the magnetic separation of the computing modules. Due to the biocompatibility and design flexibility of DNA, these investigations may provide a new route towards the development of resettable advanced logic circuits in biological and biomedical fields.
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Affiliation(s)
- Siqi Zhang
- Department of Chemistry, Taizhou University, Jiaojiang, 318000, China.
| | - Kun Wang
- College of Sciences, Northeastern University, Shenyang, 110819, China.
| | - Congcong Huang
- Department of Food Engineering, Shandong Business Institute, Yantai, 264670, China
| | - Zhenyu Li
- College of Sciences, Northeastern University, Shenyang, 110819, China.
| | - Ting Sun
- College of Sciences, Northeastern University, Shenyang, 110819, China.
| | - De-Man Han
- Department of Chemistry, Taizhou University, Jiaojiang, 318000, China.
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62
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Jimenez-Ruiz A, Grueso E, Perez-Tejeda P, Muriel-Delgado F, Torres-Marquez C. Electrochemiluminescent (ECL) [Ru(bpy)3]2+/PAMAM dendrimer reactions: coreactant effect and 5-fluorouracil/dendrimer complex formation. Anal Bioanal Chem 2016; 408:7213-24. [DOI: 10.1007/s00216-016-9816-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/03/2016] [Accepted: 07/20/2016] [Indexed: 01/18/2023]
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63
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Miao X, Wang W, Kang T, Liu J, Shiu KK, Leung CH, Ma DL. Ultrasensitive electrochemical detection of miRNA-21 by using an iridium(III) complex as catalyst. Biosens Bioelectron 2016; 86:454-458. [PMID: 27424263 DOI: 10.1016/j.bios.2016.07.001] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/27/2016] [Accepted: 07/01/2016] [Indexed: 11/17/2022]
Abstract
The ultrasensitive electrochemical detection of miRNA-21 was realized by using a novel redox and catalytic "all-in-one" mechanism with an iridium(III) complex as a catalyst. To construct such a sensor, a capture probe (CP) was firstly immobilized onto the gold electrode surface. In the presence of miRNA-21, a sandwiched DNA complex could form between CP and a methylene blue (MB) labeled G-rich detection probe modified onto a gold nanoparticle (AuNP) surface (DP-AuNPs). Upon addition of K(+), the structure of DP changed to a G-quadruplex. Then, the iridium(III) complex could selectively interact with the G-quadruplex, catalyzing the reduction of H2O2, which was accompanied by an electrochemical signal change using MB as an electron mediator. Under optimal conditions, the electrochemical signal of MB reduction peak was proportional to miRNA concentration in the range from 5.0 fM to 1.0 pM, with a detection limit of 1.6 fM. In addition, satisfactory results were obtained for miRNA-21 detection in human serum samples, indicating a potential application of the sensor for bioanalysis.
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Affiliation(s)
- Xiangmin Miao
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, PR China; Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Tianshu Kang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Jinbiao Liu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Kwok-Keung Shiu
- 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, Macao, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China.
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65
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66
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Wang H, Wang J, Sun N, Cheng H, Chen H, Pei R. Selection and Characterization of Malachite Green Aptamers for the Development of Light-up Probes. ChemistrySelect 2016. [DOI: 10.1002/slct.201600154] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hongyan Wang
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
- School of Life Science; Shanghai University; Shanghai 200444 China
| | - Jine Wang
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
| | - Na Sun
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
| | - Hui Cheng
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
- School of Life Science; Shanghai University; Shanghai 200444 China
| | - Hongxia Chen
- School of Life Science; Shanghai University; Shanghai 200444 China
| | - Renjun Pei
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
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67
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Xu L, Hong S, Shen X, Zhou L, Wang J, Zhang J, Pei R. DNA Triplexes-Guided Assembly of G-Quadruplexes for Constructing Label-free Fluorescent Logic Gates. Chem Asian J 2016; 11:1892-5. [DOI: 10.1002/asia.201600626] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Lijun Xu
- Key Laboratory of Nano-Bio Interface; Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Shanni Hong
- Key Laboratory of Nano-Bio Interface; Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Xiaoqiang Shen
- Key Laboratory of Nano-Bio Interface; Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
- School of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Lu Zhou
- Key Laboratory of Nano-Bio Interface; Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
| | - Jine Wang
- Key Laboratory of Nano-Bio Interface; Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
| | - Jianye Zhang
- School of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Renjun Pei
- Key Laboratory of Nano-Bio Interface; Division of Nanobiomedicine; Suzhou Institute of Nano-Tech and Nano-Bionics; Chinese Academy of Sciences; Suzhou 215123 China
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68
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Electrochemical biosensor modified with dsDNA monolayer for restriction enzyme activity determination. Bioelectrochemistry 2016; 109:63-9. [DOI: 10.1016/j.bioelechem.2016.01.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 01/28/2016] [Accepted: 01/31/2016] [Indexed: 11/22/2022]
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69
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Miao X, Yang C, Leung CH, Ma DL. Application of iridium(III) complex in label-free and non-enzymatic electrochemical detection of hydrogen peroxide based on a novel "on-off-on" switch platform. Sci Rep 2016; 6:25774. [PMID: 27170211 PMCID: PMC4864421 DOI: 10.1038/srep25774] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 04/22/2016] [Indexed: 12/15/2022] Open
Abstract
We herein report a label-free and non-enzymatic electrochemical sensor for the highly sensitive detection of hydrogen peroxide (H2O2) based on a novel "on-off-on" switch system. In our design, MB was used as an electron mediator to accelerate the electron transfer while AuNPs was used to amplify the electrochemical signal due to its excellent biocompatibility and good conductivity. The "switch-off" state was achieved by introducing the guanine-rich capture probe (CP) and an iridium complex onto the electrode surface to form a hydrophobic layer, which then hinders electron transfer. Upon addition of H2O2, fenton reaction occurs and produces OH• in the presence of Fe(2+). The OH• cleaves the CP into DNA fragments, thus resulting in the release of CP and iridium complex from the sensing interface, recovering the electrochemical signal to generate a "switch-on" state. Based on this novel switch system, a detection limit as low as 3.2 pM can be achieved for H2O2 detection. Moreover, satisfactory results were obtained by using this method for the detection of H2O2 in sterilized milk. To the best of our knowledge, this is the first G-quadruplex-based electrochemical sensor using an iridium(III) complex.
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Affiliation(s)
- Xiangmin Miao
- 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
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
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70
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Huang BH, Geng ZR, Ma XY, Zhang C, Zhang ZY, Wang ZL. Lysosomal ATP imaging in living cells by a water-soluble cationic polythiophene derivative. Biosens Bioelectron 2016; 83:213-20. [PMID: 27131993 DOI: 10.1016/j.bios.2016.04.064] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 04/19/2016] [Accepted: 04/20/2016] [Indexed: 12/27/2022]
Abstract
Lysosomes in astrocytes and microglia can release ATP as the signaling molecule for the cells through ca(2+)-dependent exocytosis in response to various stimuli. At present, fluorescent probes that can detect ATP in lysosomes have not been reported. In this work, we have developed a new water-soluble cationic polythiophene derivative that can be specifically localized in lysosomes and can be utilized as a fluorescent probe to sense ATP in cells. PEMTEI exhibits high selectivity and sensitivity to ATP at physiological pH values and the detection limit of ATP is as low as 10(-11)M. The probe has low cytotoxicity, good permeability and high photostability in living cells and has been applied successfully to real-time monitoring of the change in concentrations of ATP in lysosomes though fluorescence microscopy. We also demonstrated that lysosomes in Hela cells can release ATP through Ca(2+)-dependent exocytosis in response to drug stimuli.
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Affiliation(s)
- Bing-Huan Huang
- State key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Zhi-Rong Geng
- State key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, PR China.
| | - Xiao-Yan Ma
- State key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Cui Zhang
- State key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Zhi-Yang Zhang
- State key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Zhi-Lin Wang
- State key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, PR China.
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71
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Kang TS, Mao Z, Ng CT, Wang M, Wang W, Wang C, Lee SMY, Wang Y, Leung CH, Ma DL. Identification of an Iridium(III)-Based Inhibitor of Tumor Necrosis Factor-α. J Med Chem 2016; 59:4026-31. [DOI: 10.1021/acs.jmedchem.6b00112] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tian-Shu Kang
- State
Key Laboratory of Quality Research in Chinese Medicine, Institute
of Chinese Medical Sciences, University of Macau, Taipa, Macao, P. R. China
| | - Zhifeng Mao
- Department
of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P. R. China
| | - Chan-Tat Ng
- State
Key Laboratory of Quality Research in Chinese Medicine, Institute
of Chinese Medical Sciences, University of Macau, Taipa, Macao, P. R. China
| | - Modi Wang
- Department
of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P. R. China
| | - Wanhe Wang
- Department
of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P. R. China
| | - Chunming Wang
- State
Key Laboratory of Quality Research in Chinese Medicine, Institute
of Chinese Medical Sciences, University of Macau, Taipa, Macao, P. R. China
| | - Simon Ming-Yuen Lee
- State
Key Laboratory of Quality Research in Chinese Medicine, Institute
of Chinese Medical Sciences, University of Macau, Taipa, Macao, P. R. China
| | - Yitao Wang
- State
Key Laboratory of Quality Research in Chinese Medicine, Institute
of Chinese Medical Sciences, University of Macau, Taipa, Macao, P. R. China
| | - Chung-Hang Leung
- State
Key Laboratory of Quality Research in Chinese Medicine, Institute
of Chinese Medical Sciences, University of Macau, Taipa, Macao, P. R. China
| | - Dik-Lung Ma
- Department
of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P. R. China
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72
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Pan Y, Shi Y, Chen Z, Chen J, Hou M, Chen Z, Li CW, Yi C. Design of Multiple Logic Gates Based on Chemically Triggered Fluorescence Switching of Functionalized Polyethylenimine. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9472-9482. [PMID: 27007856 DOI: 10.1021/acsami.6b02080] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this study, two new functionalized polyethylenimine (PEI), PEIR and PEIQ, have been synthesized by covalently conjugating rhodamine 6G (R6G) or 8-chloroacetyl-aminoquinoline (CAAQ) and have been investigated for their sensing capabilities toward metal ions and anions basing on fluorescence on-off and off-on mechanisms. When triggered by protons, metal ions, or anions, functionalized PEIs can behave as a fluorescence switch, leading to a multiaddressable system. Inspired by these results, functionalized PEI-based logic systems capable of performing elementary logic operations (YES, NOT, NOR, and INHIBIT) and integrative logic operations (OR + INHIBIT) have been constructed by observing the change in the fluorescence with varying the chemical inputs such as protons, metal ions, and anions. Due to its characteristics, such as high sensitivity and fast response, developing functionalized PEI as a new material to perform logic operations may pave a new avenue to construct the next generation of molecular devices with better applicability for biomedical research.
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Affiliation(s)
- Yi Pan
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University , Guangzhou, 510275 China
| | - Yupeng Shi
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University , Guangzhou, 510275 China
| | - Zhihua Chen
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University , Guangzhou, 510275 China
| | - Junying Chen
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University , Guangzhou, 510275 China
| | - Mengfei Hou
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University , Guangzhou, 510275 China
| | - Zhanpeng Chen
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University , Guangzhou, 510275 China
| | - Cheuk-Wing Li
- Institute of Chinese Medical Sciences, University of Macau , Macau, China
| | - Changqing Yi
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University , Guangzhou, 510275 China
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73
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Mao Z, Liu J, Kang TS, Wang W, Han QB, Wang CM, Leung CH, Ma DL. An Ir(III) complex chemosensor for the detection of thiols. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2016; 17:109-114. [PMID: 27877862 PMCID: PMC5101911 DOI: 10.1080/14686996.2016.1162081] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 02/26/2016] [Accepted: 03/02/2016] [Indexed: 05/23/2023]
Abstract
In this study, we report the use of a cyclometalated luminescent iridium(III) complex for the visualization of thiols. The detection of glutathione (GSH) by complex 1 is achieved through the reduction of its phendione N^N donor, which influences the metal-to-ligand charge-transfer (MLCT) of the complex. Complex 1 produced a maximum threefold luminescence enhancement at 587 nm in response to GSH. The linear detection range of 1 for GSH is between 0.2 and 2 M equivalents of GSH, with a detection limit of 1.67 μM. Complex 1 also displays good selectivity for thiols over other amino acids.
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Affiliation(s)
- Zhifeng Mao
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P.R. China
| | - Jinbiao Liu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P.R. China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, P.R. China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P.R. China
| | - Quan-Bin Han
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P.R. China
| | - Chun-Ming Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, P.R. China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, P.R. China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, P.R. China
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74
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Ponhong K, Supharoek SA, Siriangkhawut W, Grudpan K. Employing peroxidase from Thai indigenous plants for the application of hydrogen peroxide assay. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-0845-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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75
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Ma DL, Wang W, Mao Z, Kang TS, Han QB, Chan PWH, Leung CH. Utilization of G-Quadruplex-Forming Aptamers for the Construction of Luminescence Sensing Platforms. Chempluschem 2016; 82:8-17. [DOI: 10.1002/cplu.201600036] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 03/07/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Dik-Lung Ma
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Wanhe Wang
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Zhifeng Mao
- Department of Chemistry; Hong Kong Baptist University; 224 Waterloo Road, Kowloon Tong Hong Kong 852 P. R. China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences; University of Macau; Macao 999078 P. R. China
| | - Quan-Bin Han
- School of Chinese Medicine; Hong Kong Baptist University; Kowloon Hong Kong 852 P. R. China
| | - Philip Wai Hong Chan
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
- Department of Chemistry; University of Warwick; Coventry CV4 7AL United Kingdom
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine; Institute of Chinese Medical Sciences; University of Macau; Macao 999078 P. R. China
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76
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An iridium(III) complex as a versatile platform for molecular logic gates: an integrated full subtractor and 1:2 demultiplexer. Anal Bioanal Chem 2016; 408:7077-83. [DOI: 10.1007/s00216-016-9443-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 02/18/2016] [Accepted: 02/22/2016] [Indexed: 02/02/2023]
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77
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Lu L, Wang M, Mao Z, Kang TS, Chen XP, Lu JJ, Leung CH, Ma DL. A novel dinuclear iridium(III) complex as a G-quadruplex-selective probe for the luminescent switch-on detection of transcription factor HIF-1α. Sci Rep 2016; 6:22458. [PMID: 26932240 PMCID: PMC4773817 DOI: 10.1038/srep22458] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 02/15/2016] [Indexed: 12/18/2022] Open
Abstract
A novel dinuclear Ir(III) complex 5 was discovered to be specific to G-quadruplex DNA, and was utilized in a label-free G-quadruplex-based detection platform for transcription factor activity. The principle of this assay was demonstrated by using HIF-1α as a model protein. Moreover, this HIF-1α detection assay exhibited potential use for biological sample analysis.
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Affiliation(s)
- Lihua Lu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Modi Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Zhifeng Mao
- 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
| | - Xiu-Ping Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Jin-Jian Lu
- 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
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78
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Huang Y, Lin Y, Ran X, Ren J, Qu X. Self-Assembly and Compartmentalization of Nanozymes in Mesoporous Silica-Based Nanoreactors. Chemistry 2016; 22:5705-11. [DOI: 10.1002/chem.201504704] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Yanyan Huang
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
- Graduate School of the University of the; Chinese Academy of Sciences; Beijing 100039 China
| | - Youhui Lin
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
- Graduate School of the University of the; Chinese Academy of Sciences; Beijing 100039 China
| | - Xiang Ran
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
- Graduate School of the University of the; Chinese Academy of Sciences; Beijing 100039 China
| | - Jinsong Ren
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
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79
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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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80
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Chen Y, Guan R, Zhang C, Huang J, Ji L, Chao H. Two-photon luminescent metal complexes for bioimaging and cancer phototherapy. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.09.010] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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81
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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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82
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Kaserer T, Rigo R, Schuster P, Alcaro S, Sissi C, Schuster D. Optimized Virtual Screening Workflow for the Identification of Novel G-Quadruplex Ligands. J Chem Inf Model 2016; 56:484-500. [PMID: 26841201 DOI: 10.1021/acs.jcim.5b00658] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
G-quadruplexes, alternative DNA secondary structures present in telomeres, emerge as promising targets for the treatment of cancer, because they prevent telomere elongation and accordingly cell proliferation. Within this study, theoretically validated pharmacophore- and shape-based models as well as a theoretically validated docking protocol were generated and applied in parallel for virtual screening and the identification of novel G-quadruplex ligands. Top-ranked hits retrieved with all methods independently and in addition in a consensus approach were selected for biological testing. Of the 32 tested virtual hits seven selectively stabilized G-quadruplexes over duplex DNA in the fluorescence melting assay. For the five most active compounds, chemically closely related analogues were collected and subjected to in vitro analysis. Thereby, seven further novel G-quadruplex ligands could be identified. These molecules do not only represent novel scaffolds, but some of them are in addition even more potent G-quadruplex stabilizers than the established reference compound berberine. This study proposes an optimized in silico workflow for the identification of novel G-quadruplex stabilizers, which can also be applied in future studies. In addition, structurally novel and promising lead candidates with strong and selective G-quadruplex stabilizing properties are reported.
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Affiliation(s)
- Teresa Kaserer
- Computer-Aided Molecular Design Group, Institute of Pharmacy/Pharmaceutical Chemistry and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck , Innrain 80-82, 6020 Innsbruck, Austria
| | - Riccardo Rigo
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova , via Marzolo 5, 35131 Padova, Italy
| | - Philipp Schuster
- Computer-Aided Molecular Design Group, Institute of Pharmacy/Pharmaceutical Chemistry and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck , Innrain 80-82, 6020 Innsbruck, Austria
| | - Stefano Alcaro
- Dipartimento di Scienze della Salute, Università "Magna Graecia" di Catanzaro , Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
| | - Claudia Sissi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova , via Marzolo 5, 35131 Padova, Italy
| | - Daniela Schuster
- Computer-Aided Molecular Design Group, Institute of Pharmacy/Pharmaceutical Chemistry and Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck , Innrain 80-82, 6020 Innsbruck, Austria
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83
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Sun H, Chen H, Zhang X, Liu Y, Guan A, Li Q, Yang Q, Shi Y, Xu S, Tang Y. Colorimetric detection of sodium ion in serum based on the G-quadruplex conformation related DNAzyme activity. Anal Chim Acta 2016; 912:133-8. [DOI: 10.1016/j.aca.2016.01.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/12/2016] [Accepted: 01/20/2016] [Indexed: 12/11/2022]
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84
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Lu L, Zhong HJ, He B, Leung CH, Ma DL. Development of a luminescent G-quadruplex-selective iridium(III) complex for the label-free detection of adenosine. Sci Rep 2016; 6:19368. [PMID: 26778273 PMCID: PMC4726048 DOI: 10.1038/srep19368] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 10/14/2015] [Indexed: 01/25/2023] Open
Abstract
A panel of six luminescent iridium(III) complexes were synthesized and evaluated for their ability to act as G-quadruplex-selective probes. The novel iridium(III) complex 1 was found to be highly selective for G-quadruplex DNA, and was employed for the construction of a label-free G-quadruplex-based adenosine detection assay in aqueous solution. Two different detection strategies were investigated for adenosine detection, and the results showed that initial addition of adenosine to the adenosine aptamer gave superior results. The assay exhibited a linear response for adenosine in the concentration range of 5 to 120 μM (R(2) = 0.992), and the limit of detection for adenosine was 5 μM. Moreover, this assay was highly selective for adenosine over other nucleosides, and exhibited potential use for biological sample analysis.
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Affiliation(s)
- Lihua Lu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Hai-Jing Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Bingyong He
- 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, 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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85
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Mao Z, Wang M, Liu J, Liu LJ, Lee SMY, Leung CH, Ma DL. A long lifetime switch-on iridium(iii) chemosensor for the visualization of cysteine in live zebrafish. Chem Commun (Camb) 2016; 52:4450-3. [DOI: 10.1039/c6cc01008c] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A long lifetime iridium(iii) complex chemosensor1for cysteine detection has been synthesized.
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Affiliation(s)
- Zhifeng Mao
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Modi Wang
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Jinbiao Liu
- 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
| | - Simon Ming-Yuen Lee
- 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
- China
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86
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Sansee A, Meksawangwong S, Chainok K, Franz KJ, Gál M, Pålsson LO, Puniyan W, Traiphol R, Pal R, Kielar F. Novel aminoalkyl tris-cyclometalated iridium complexes as cellular stains. Dalton Trans 2016; 45:17420-17430. [DOI: 10.1039/c6dt02776h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Novel tris-cyclometalated luminescent iridium complexes capable of staining cells and showing in cellulo lifetimes in the microsecond regime are reported.
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Affiliation(s)
- A. Sansee
- Department of Chemistry
- Naresuan University
- Phitsanulok
- Thailand
| | | | - K. Chainok
- Department of Physics
- Faculty of Science and Technology
- Thammasat University
- Khlong Luang
- Thailand
| | - K. J. Franz
- Department of Chemistry
- Duke University
- Durham
- USA
| | - M. Gál
- Department of Chemistry
- Slovak Technical University
- Bratislava
- Slovakia
| | | | - W. Puniyan
- Department of Chemistry
- Naresuan University
- Phitsanulok
- Thailand
| | - R. Traiphol
- Laboratory of Advanced Polymers and Nanomaterials
- Department of Chemistry and Center for Innovation in Chemistry
- Naresuan Univesity
- Phitsanulok
- Thailand
| | - R. Pal
- Department of Chemistry
- Durham University
- Durham
- UK
| | - F. Kielar
- Department of Chemistry
- Naresuan University
- Phitsanulok
- Thailand
- Center of Excellence in Biomaterials
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87
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Lu L, Wang W, Yang C, Kang TS, Leung CH, Ma DL. Iridium(iii) complexes with 1,10-phenanthroline-based N^N ligands as highly selective luminescent G-quadruplex probes and application for switch-on ribonuclease H detection. J Mater Chem B 2016; 4:6791-6796. [DOI: 10.1039/c6tb02316a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A study was performed to investigate the relationship between molecular structure and G4 sensing ability for a series of iridium(iii) complexes. The complex7was used to construct a G4-based assay for RNase H.
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Affiliation(s)
- Lihua Lu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
- Department of Chemistry
| | - Wanhe Wang
- Department of Chemistry
- Hong Kong Baptist University
- Hong Kong
- China
| | - Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - Tian-Shu Kang
- 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
- Hong Kong
- China
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88
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Lu L, Wang W, Wang M, Kang TS, Lu JJ, Chen XP, Han QB, Leung CH, Ma DL. A luminescent G-quadruplex-selective iridium(iii) complex for the label-free detection of lysozyme. J Mater Chem B 2016; 4:2407-2411. [DOI: 10.1039/c6tb00426a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Ir(iii) complex 1 displays high selectivity for the G-quadruplex, and was used to establish a label-free G-quadruplex-based detection platform for lysozyme in buffer.
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Affiliation(s)
- Lihua Lu
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Wanhe Wang
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Modi Wang
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Tian-Shu Kang
- State Key Laboratory of Quality Research in Chinese Medicine
- Institute of Chinese Medical Sciences
- University of Macau
- Macao
- China
| | - 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
| | - Quan-Bin Han
- School of Chinese Medicine
- 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
| | - Dik-Lung Ma
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
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89
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Wang W, Mao Z, Wang M, Liu LJ, Kwong DWJ, Leung CH, Ma DL. A long lifetime luminescent iridium(iii) complex chemosensor for the selective switch-on detection of Al3+ ions. Chem Commun (Camb) 2016; 52:3611-4. [DOI: 10.1039/c5cc10383e] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A novel luminescent cyclometalated iridium(iii) complex 1 was synthesized and employed as a chemosensor for the detection of Al3+ ions. 1 displays a long lifetime luminescence that allow 1 to detect Al3+ ions in strong fluorescence media.
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Affiliation(s)
- Wanhe Wang
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Zhifeng Mao
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- China
| | - Modi Wang
- 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
| | | | - 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
- China
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90
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Zhang S, Wang K, Huang C, Sun T. Reconfigurable and resettable arithmetic logic units based on magnetic beads and DNA. NANOSCALE 2015; 7:20749-20756. [PMID: 26602962 DOI: 10.1039/c5nr06733b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Based on the characteristics of magnetic beads and DNA, a simple and universal platform was developed for the integration of multiple logic gates to achieve resettable half adder and half subtractor functions. The signal reporter was composed of a split G-quadruplex DNAzyme and AuNP-surface immobilized molecular beacon molecule. The novel feature of the designed system is that the inputs (split G-quadruplexes) can interact with hairpin-modified Au NPs linked to magnetic particles. Another novel feature is that the logic operations can be reset by heating the output system and by using the magnetic separation of the computing modules. Moreover, the developed half adder and half subtractor are realized on a simple DNA/magnetic bead platform in an enzyme-free system and share a constant threshold setpoint. Due to the diversity and design flexibility of DNA, these investigations may provide a new method for the development of resettable DNA-based arithmetic operations.
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Affiliation(s)
- Siqi Zhang
- College of Sciences, Northeastern University, Shenyang, 110819, China.
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91
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Xiao X, Wu T, Gu F, Zhao M. Generation of artificial sequence-specific nucleases via a preassembled inert-template. Chem Sci 2015; 7:2051-2057. [PMID: 29899930 PMCID: PMC5968549 DOI: 10.1039/c5sc04398k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 12/07/2015] [Indexed: 02/01/2023] Open
Abstract
Sequence specific nucleases are important tools for processing nucleic acids in a predictable way. Herein, we demonstrate a conceptually new approach for generating sequence-specific nucleases via a preassembled inert-template (PAIT). A fairly stable DNase I/inert-DNA complex was prepared with a customized sequence specificity for a target DNA which contains a sequence complementary to the inert-DNA template. The complex could efficiently cleave the targeted sequence within either a long double-stranded DNA or a single-stranded DNA without affecting other unrelated DNA strands. The discrimination factor against single-base mismatch strands within a 14 nt target region was as high as 25.3. The strategy was also successfully applied to RNase A. Our findings may hold great potential for the development of a number of new powerful enzymatic tools.
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Affiliation(s)
- Xianjin Xiao
- Beijing National Laboratory for Molecular Sciences and MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China .
| | - Tongbo Wu
- Beijing National Laboratory for Molecular Sciences and MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China .
| | - Feidan Gu
- Beijing National Laboratory for Molecular Sciences and MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China .
| | - Meiping Zhao
- Beijing National Laboratory for Molecular Sciences and MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China .
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92
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Fang S, Chen L, Zhao M. Unimolecular Chemically Modified DNA Fluorescent Probe for One-Step Quantitative Measurement of the Activity of Human Apurinic/Apyrimidinic Endonuclease 1 in Biological Samples. Anal Chem 2015; 87:11952-6. [PMID: 26605979 DOI: 10.1021/acs.analchem.5b03939] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A novel DNA structure containing a 3' internal-loop modified abasic site has been constructed which enables effective differentiation between apurinic/apyrimidinic endonuclease (APE1) and nonspecific endonuclease (DNase I). When this unique substrate structure is employed, a double-loop frayed-end chimeric fluorescent probe is successfully developed for quantitative measurement of the activity of APE1 in biological samples without the need of additional cleanup or preconcentration steps. The method is simple and rapid and has a single-step with a linear working range between 0.1 and 5.0 U/mL and a lower limit of detection of 0.1 U/mL. It holds great potential in real-time monitoring of the variation of intracellular and extracellular APE1, which will be very useful for further understanding of the DNA repair pathways in different organisms.
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Affiliation(s)
- Simin Fang
- Beijing National Laboratory for Molecular Sciences, MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Lu Chen
- Beijing National Laboratory for Molecular Sciences, MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
| | - Meiping Zhao
- Beijing National Laboratory for Molecular Sciences, MOE Key Laboratory of Bioorganic Chemistry and Molecular Engineering, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
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93
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Ebrahimi KH, Hagedoorn PL, Jacobs D, Hagen WR. Accurate label-free reaction kinetics determination using initial rate heat measurements. Sci Rep 2015; 5:16380. [PMID: 26574737 PMCID: PMC4647221 DOI: 10.1038/srep16380] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/13/2015] [Indexed: 11/08/2022] Open
Abstract
Accurate label-free methods or assays to obtain the initial reaction rates have significant importance in fundamental studies of enzymes and in application-oriented high throughput screening of enzyme activity. Here we introduce a label-free approach for obtaining initial rates of enzyme activity from heat measurements, which we name initial rate calorimetry (IrCal). This approach is based on our new finding that the data recorded by isothermal titration calorimetry for the early stages of a reaction, which have been widely ignored, are correlated to the initial rates. Application of the IrCal approach to various enzymes led to accurate enzyme kinetics parameters as compared to spectroscopic methods and enabled enzyme kinetic studies with natural substrate, e.g. proteases with protein substrates. Because heat is a label-free property of almost all reactions, the IrCal approach holds promise in fundamental studies of various enzymes and in use of calorimetry for high throughput screening of enzyme activity.
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Affiliation(s)
- Kourosh Honarmand Ebrahimi
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
| | - Peter-Leon Hagedoorn
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
| | - Denise Jacobs
- DSM Biotechnology Center, Alexander Fleminglaan 1, 2613 AX Delft, the Netherlands
| | - Wilfred R. Hagen
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
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94
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Song C, Yang X, Wang K, Wang Q, Liu J, Huang J, He L, Liu P, Qing Z, Liu W. A sensitive detection of T4 polynucleotide kinase activity based on β-cyclodextrin polymer enhanced fluorescence combined with an exonuclease reaction. Chem Commun (Camb) 2015; 51:1815-8. [PMID: 25519768 DOI: 10.1039/c4cc08991j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A strategy for T4 polynucleotide kinase activity detection was proposed based on a β-cyclodextrin polymer (polyβ-CD) and an exonuclease reaction. The fluorescence of pyrene enhanced by more than 10 times in the presence of polyβ-CD, and a simple detection of T4 PNK was achieved with a detection limit of 0.02 units per mL.
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Affiliation(s)
- Chunxia Song
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China.
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95
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Liao Y, Fu Y, Wu Y, Huang R, Zhou X, Xing D. Ultrasensitive Detection of MicroRNA in Tumor Cells and Tissues via Continuous Assembly of DNA Probe. Biomacromolecules 2015; 16:3543-51. [DOI: 10.1021/acs.biomac.5b00959] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuhui Liao
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University; Guangzhou, China
| | - Yu Fu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University; Guangzhou, China
| | - Yunxia Wu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University; Guangzhou, China
| | - Ru Huang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University; Guangzhou, China
| | - Xiaoming Zhou
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University; Guangzhou, China
| | - Da Xing
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University; Guangzhou, China
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96
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Lu L, Zhong HJ, Wang M, Ho SL, Li HW, Leung CH, Ma DL. Inhibition of Beta-Amyloid Fibrillation by Luminescent Iridium(III) Complex Probes. Sci Rep 2015; 5:14619. [PMID: 26419607 PMCID: PMC4588514 DOI: 10.1038/srep14619] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 05/01/2015] [Indexed: 11/20/2022] Open
Abstract
We report herein the application of kinetically inert luminescent iridium(III) complexes as dual inhibitors and probes of beta-amyloid fibrillogenesis. These iridium(III) complexes inhibited Aβ1–40 peptide aggregation in vitro, and protected against Aβ-induced cytotoxicity in neuronal cells. Furthermore, the complexes differentiated between the aggregated and unaggregated forms of Aβ1–40 peptide on the basis of their emission response.
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Affiliation(s)
- Lihua Lu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Hai-Jing Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Modi Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - See-Lok Ho
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Hung-Wing Li
- 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, Macao, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
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97
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Identification of an iridium(III) complex with anti-bacterial and anti-cancer activity. Sci Rep 2015; 5:14544. [PMID: 26416333 PMCID: PMC4586517 DOI: 10.1038/srep14544] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 06/03/2015] [Indexed: 12/25/2022] Open
Abstract
Group 9 transition metal complexes have been widely explored as therapeutic agents due to their unique geometry, their propensity to undergo ligand exchanges with biomolecules and their diverse steric and electronic properties. These metal complexes can offer distinct modes of action in living organisms compared to carbon-based molecules. In this study, we investigated the antimicrobial and anti-proliferative abilities of a series of cyclometallated iridium(III) complexes. The iridium(III) complex 1 inhibited the growth of S. aureus with MIC and MBC values of 3.60 and 7.19 μM, respectively, indicating its potent bactericidal activity. Moreover, complex 1 also exhibited cytotoxicity against a number of cancer cell lines, with particular potency against ovarian, cervical and melanoma cells. This cyclometallated iridium(III) complex is the first example of a substitutionally-inert, Group 9 organometallic compound utilized as a direct and selective inhibitor of S. aureus.
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98
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Ma DL, Wang M, He B, Yang C, Wang W, Leung CH. A Luminescent Cocaine Detection Platform Using a Split G-Quadruplex-Selective Iridium(III) Complex and a Three-Way DNA Junction Architecture. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19060-19067. [PMID: 26284502 DOI: 10.1021/acsami.5b05861] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, a series of 10 in-house cyclometalated iridium(III) complexes bearing different auxiliary ligands were tested for their selectivity toward split G-quadruplex in order to construct a label-free switch-on cocaine detection platform employing a three-way junction architecture and a G-quadruplex motif as a signal output unit. Through two rounds of screening, we discovered that the iridium(III) complex 7 exhibited excellent selectivity toward the intermolecular G-quadruplex motif. A detection limit as low as 30 nM for cocaine can be achieved by this sensing approach with a linear relationship between luminescence intensity and cocaine concentration established from 30 to 300 nM. Furthermore, this sensing approach could detect cocaine in diluted oral fluid. We hope that our simple, signal-on, label-free oligonucleotide-based sensing method for cocaine using a three-way DNA junction architecture could act as a useful platform in bioanalytical research.
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Affiliation(s)
- 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 , Hong Kong, China
| | - Modi Wang
- Department of Chemistry, Hong Kong Baptist University , Hong Kong, China
| | - Bingyong He
- Department of Chemistry, Hong Kong Baptist University , Hong Kong, China
| | - Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao, China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University , Hong Kong, 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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99
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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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100
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Recent Developments in G-Quadruplex Probes. ACTA ACUST UNITED AC 2015; 22:812-28. [DOI: 10.1016/j.chembiol.2015.06.016] [Citation(s) in RCA: 136] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/09/2015] [Accepted: 06/10/2015] [Indexed: 11/24/2022]
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