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Han Y, You Y, Xu X, Li X, Liu G, Lai G. Amplified Assembly of G-Quadruplex-Decorated DNA Network Nanostructure toward AIE Signaling-Based Sensitive Biosensing. ACS Sens 2024; 9:1749-1755. [PMID: 38587118 DOI: 10.1021/acssensors.3c02594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Aggregation-induced emission (AIE) has offered a promising approach for developing low-background fluorescent methods; however, its applications often suffer from complex probe synthesis and poor biocompatibility. Herein, a novel AIE biosensing method for kanamycin antibiotic assays was developed by utilizing a DNA network nanostructure assembled from an aptamer recognition reaction to capture a large number of tetraphenylethylene fluorogen-labeled signal DNA (DTPE) probes. Due to the excellent hydrophilicity of the oligonucleotides, DTPE exhibited excellent water solubility without obvious background signal emission. Based on an ingenious nucleotide design, an abundance of G-quadruplex blocks neighboring the captured DTPE were formed on the DNA nanostructure. Because of the greatly restricted free motion of DTPE by this unique nanostructure, a strong AIE fluorescence signal response was produced to construct the signal transduction strategy. Together with target recycling and rolling circle amplification-based cascade nucleic acid amplification, this method exhibited a wide linear range from 75 fg mL-1 to 1 ng mL-1 and a detection limit down to 24 fg mL-1. The excellent analytical performance and effective manipulation improvement of the method over previous approaches determine its promising potential for various applications.
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Affiliation(s)
- Yicheng Han
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China
| | - Yingying You
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China
| | - Xiaoyue Xu
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China
| | - Xin Li
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China
| | - Guozhen Liu
- Integrated Devices and Intelligent Diagnosis Laboratory, CUHK(SZ)-Boyalife Joint Laboratory for Regenerative Medicine Engineering, School of Medicine, The Chinese University of Hong Kong, Shenzhen 518172, PR China
- Ciechanover Institute of Precision and Regenerative Medicine, School of Medicine, The Chinese University of Hong Kong, Shenzhen 518172, PR China
| | - Guosong Lai
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China
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Ma K, Li X, Xu B, Tian W. Label-free bioassay with graphene oxide-based fluorescent aptasensors: A review. Anal Chim Acta 2021; 1188:338859. [PMID: 34794573 DOI: 10.1016/j.aca.2021.338859] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/15/2021] [Accepted: 07/16/2021] [Indexed: 12/12/2022]
Abstract
Bioassays using a fluorophore and DNA aptamer have been extensively developed due to the ultrasensitivity of fluorophores and recognition ability of DNA aptamers. Conventional fluorescent aptamer-based sensors (aptasensors) require chemical labeling between the fluorophore and aptamer and is technologically impracical for various sensing and assay applications. A simple "mix and go" strategy has been introduced that uses label-free technology as a platform for sensor development. The biosensors comprise a fluorophore, a ssDNA aptamer, and eco-friendly graphene oxide (GO). In the absence of the sensor target, GO quenches the fluorescence of the fluorophore and single-strand DNA aptamer complex. When the target is added, the DNA aptamer conformationally turns into a duplex, G-quadruplexe, or other secondary structure. This structure change leads to release of GO by the fluorophore-aptamer-target complex, generating dramatic fluorescence recovery and amplification. With this sensing method, the DNA aptamer does not need to be chemically labeled. Therefore, flexible fluorophore indicators and ssDNA aptamers can be used in this label-free aptasensing strategy. In this review, we discuss various unlabeled fluorophores, including synthetic small molecular fluorophores and genetically encoded fluorescent proteins, as indicators for generating GO-based fluorescent DNA aptasensors for label-free bioassay.
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Affiliation(s)
- Ke Ma
- Center of AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, PR China
| | - Xing Li
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, 100101, PR China.
| | - Bin Xu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
| | - Wenjing Tian
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, PR China
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DNA-targeted formation and catalytic reactions of DNAzymes for label-free ratiometric electrochemiluminescence biosensing. Talanta 2021; 225:121964. [PMID: 33592718 DOI: 10.1016/j.talanta.2020.121964] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 11/26/2020] [Accepted: 11/30/2020] [Indexed: 01/18/2023]
Abstract
A label-free ratiometric electrochemiluminescence (ECL) sensing strategy for the sensitive detection of target DNA (T-DNA) was proposed on the basis of G-quadruplex/hemin-regulated ECL emissions of CdS quantum dots (QDs) and luminol with their common coreactant of H2O2. The ECL biosensor was constructed through stepwise assemblies of CdS QDs and hairpin DNA (H-DNA) on a glassy carbon electrode, and subsequent introduction of T-DNA resulted in the development of G-quadruplex/hemin DNAzymes via the specific recognition of T-DNA and H-DNA in the presence of hemin and K+ ions. The formed DNAzymes not only prompted the catalytic oxidation of hydroquinone followed by deposition of insoluble oxidation oligomers on the electrode surface to attenuate the cathodic ECL emission of CdS QDs but also triggered the catalytic oxidation of luminol to enhance the anodic ECL emission. The label-free ratiometric ECL biosensor for the detection of T-DNA showed a wide response range from 1 to 10,000 fM (10-15 M) with a low detection limit of 0.2 fM and exhibited excellent selectivity against mismatched base sequences. This work provides a reliable and sensitive sensing platform for the detection of targets in analytical community by means of rational design of DNA sequences.
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Zhu X, Tang R, Wang S, Chen X, Hu J, Lei C, Huang Y, Wang H, Nie Z, Yao S. Protein@Inorganic Nanodumpling System for High-Loading Protein Delivery with Activatable Fluorescence and Magnetic Resonance Bimodal Imaging Capabilities. ACS NANO 2020; 14:2172-2182. [PMID: 31990525 DOI: 10.1021/acsnano.9b09024] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Efficient protein delivery into the target cell is highly desirable for protein therapeutics. Current approaches for protein delivery commonly suffer from low-loading protein capacity, poor specificity for target cells, and invisible protein release. Herein, we report a protein@inorganic nanodumpling (ND) system as an intracellular protein delivery platform. Similar to a traditional Chinese food, the dumpling, ND consists of a protein complex "filling" formed by metal-ion-directed self-assembly of protein cargos fused to histidine-rich green fluorescent proteins (H39GFPs), which are further encapsulated by an external surface "wrapper" of manganese dioxide (MnO2) via in situ biomineralization. This ND structure allows for a high loading capacity (>63 wt %) for protein cargos with enhanced stability. NDs can be targeted and internalized into cancer cells specifically through folic acid receptors by surface-tailored folic acid. The protein cargo release is in a bistimuli-responsive manner, triggered by an either reductive or acidic intracellular microenvironment. Moreover, the MnO2 nanowrapper is an efficient fluorescence quencher for inner fused GFPs and also a "switch-on" magnetic resonance imaging (MRI) agent via triggered release of Mn2+ ions, which enables activatable fluorescence/MRI bimodal imaging of protein release. Finally, the ND is highly potent and specific to deliver functional protein ribonuclease A (RNase A) into cultured target cells and the tumor site in a xenografted mouse model, eliminating the tumor cells with high therapeutic efficacy. Our approach provides a promising alternative to advance protein-based cancer therapeutics.
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Affiliation(s)
- Xiaohua Zhu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering , Hunan Normal University , Changsha 410081 , P. R. China
| | - Rui Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
| | - Shigong Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
| | - Xiaoye Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
| | - Jiajun Hu
- College of Biology , Hunan University , Changsha 410082 , P. R. China
| | - Chunyang Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
| | - Honghui Wang
- College of Biology , Hunan University , Changsha 410082 , P. R. China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology , Hunan University , Changsha 410082 , P. R. China
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Deng H, Liu H, Kang W, Lei C, Nie Z, Huang Y, Yao S. Biomineralization synthesis of a near-infrared fluorescent nanoprobe for direct glucose sensing in whole blood. NANOSCALE 2020; 12:864-870. [PMID: 31833533 DOI: 10.1039/c9nr06691h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A near-infrared (NIR) fluorescent nanoprobe that enables to circumvent the interference of background absorption and fluorescence in whole blood was developed for the direct sensing of blood glucose. Here, NIR fluorescent protein (iRFP) and glucose oxidase (GOx) were collectively deployed as the templates for the biomineralization of Mn2+ to prepare a NIR fluorescent nanoprobe (iRFP-GOx-MnO2 nanoparticles, iRGMs), in which the fluorescence of iRFP was effectively quenched by MnO2via energy transfer. When the iRGMs were mixed with whole blood samples, GOx can convert blood glucose into gluconic acid, as well as H2O2, which will reduce MnO2 and decompose the iRGMs. As a result, the NIR fluorescence of iRFPs was restored, providing a fluorometric assay for the direct detection of blood glucose. Owing to the high efficiency of the cascade reaction and the low background interference of the NIR fluorescence signal, accurate and rapid analysis of the glucose levels in whole blood samples was achieved using the iRGMs. Moreover, an iRGM-based paper device that only requires 5 microliters of samples was also demonstrated in the direct assay of blood glucose without any pretreatment, affording an alternative approach for the accurate monitoring of blood glucose levels.
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Affiliation(s)
- Honghua Deng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, Hunan University, Changsha 410082, P. R. China..
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Deng H, Yan S, Huang Y, Lei C, Nie Z. Design strategies for fluorescent proteins/mimics and their applications in biosensing and bioimaging. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Zhang S, Huang J, Lu J, Liu M, Li Y, Fang L, Huang H, Huang J, Mo F, Zheng J. A novel fluorescent biosensor based on dendritic DNA nanostructure in combination with ligase reaction for ultrasensitive detection of DNA methylation. J Nanobiotechnology 2019; 17:121. [PMID: 31812164 PMCID: PMC6898925 DOI: 10.1186/s12951-019-0552-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Accepted: 11/25/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND DNA methylation detection is indispensable for the diagnosis and prognosis of various diseases including malignancies. Hence, it is crucial to develop a simple, sensitive, and specific detection strategy. METHODS A novel fluorescent biosensor was developed based on a simple dual signal amplification strategy using functional dendritic DNA nanostructure and signal-enriching polystyrene microbeads in combination with ligase detection reaction (LDR). Dendritic DNA self-assembled from Y-DNA and X-DNA through enzyme-free DNA catalysis of a hairpin structure, which was prevented from unwinding at high temperature by adding psoralen. Then dendritic DNA polymer labeled with fluorescent dye Cy5 was ligated with reporter probe into a conjugate. Avidin-labeled polystyrene microbeads were specifically bound to biotin-labeled capture probe, and hybridized with target sequence and dendritic DNA. LDR was triggered by adding Taq ligase. When methylated cytosine existed, the capture probe and reporter probe labeled with fluorescent dye perfectly matched the target sequence, forming a stable duplex to generate a fluorescence signal. However, after bisulfite treatment, unmethylated cytosine was converted into uracil, resulting in a single base mismatch. No fluorescence signal was detected due to the absence of duplex. RESULTS The obtained dendritic DNA polymer had a large volume. This method was time-saving and low-cost. Under the optimal experimental conditions using avidin-labeled polystyrene microbeads, the fluorescence signal was amplified more obviously, and DNA methylation was quantified ultrasensitively and selectively. The detection range of this sensor was 10-15 to 10-7 M, and the limit of detection reached as low as 0.4 fM. The constructed biosensor was also successfully used to analyze actual samples. CONCLUSION This strategy has ultrasensitivity and high specificity for DNA methylation quantification, without requiring complex processes such as PCR and enzymatic digestion, which is thus of great value in tumor diagnosis and biomedical research.
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Affiliation(s)
- Shu Zhang
- Department of Clinical and Military Laboratory Medicine, College of Medical Laboratory Science, Army Medical University, Chongqing, 400038, China.,Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, Guiyang, 550004, China.,Center for Clinical Laboratories, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Jian Huang
- Center for Clinical Laboratories, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Jingrun Lu
- Center for Clinical Laboratories, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Min Liu
- Center for Clinical Laboratories, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Yan Li
- Department of Clinical and Military Laboratory Medicine, College of Medical Laboratory Science, Army Medical University, Chongqing, 400038, China
| | - Lichao Fang
- Department of Clinical and Military Laboratory Medicine, College of Medical Laboratory Science, Army Medical University, Chongqing, 400038, China
| | - Hui Huang
- Department of Clinical and Military Laboratory Medicine, College of Medical Laboratory Science, Army Medical University, Chongqing, 400038, China
| | - Jianjun Huang
- Department of Breast Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China
| | - Fei Mo
- Department of Basic Clinical Laboratory Medicine, School of Clinical Laboratory Science, Guizhou Medical University, Guiyang, 550004, China. .,Center for Clinical Laboratories, Affiliated Hospital of Guizhou Medical University, Guiyang, 550004, China.
| | - Junsong Zheng
- Department of Clinical and Military Laboratory Medicine, College of Medical Laboratory Science, Army Medical University, Chongqing, 400038, China.
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8
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Nanomaterials as efficient platforms for sensing DNA. Biomaterials 2019; 214:119215. [DOI: 10.1016/j.biomaterials.2019.05.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 05/13/2019] [Accepted: 05/16/2019] [Indexed: 02/07/2023]
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Augustine G, Raghavan S, NumbiRamudu K, Easwaramoorthi S, Shanmugam G, Seetharani Murugaiyan J, Gunasekaran K, Govind C, Karunakaran V, Ayyadurai N. Excited State Electronic Interconversion and Structural Transformation of Engineered Red-Emitting Green Fluorescent Protein Mutant. J Phys Chem B 2019; 123:2316-2324. [PMID: 30789731 DOI: 10.1021/acs.jpcb.8b10516] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Red fluorescent proteins with a large Stokes shift offer a limited autofluorescence background and are used in deep tissue imaging. Here, by introducing the free amino group in Aequorea victoria, the electrostatic charges of the p-hydroxybenzylidene imidazolinone chromophore of green fluorescent protein (GFP) have been altered resulting in an unusual, 85 nm red-shifted fluorescence. The structural and biophysical analysis suggested that the red shift is due to positional shift occupancy of Glu222 and Arg96, resulting in extended conjugation and a relaxed chromophore. Femtosecond transient absorption spectra exhibited that the excited state relaxation dynamics of red-shifted GFP (rGFP) (τ4 = 234 ps) are faster compared to the A. victoria green fluorescent protein (τ4 = 3.0 ns). The nanosecond time-resolved emission spectra of rGFP reveal the continuous spectral shift during emission by a solvent reorientation in the chromophore. Finally, the molecular dynamics simulations revealed the rearrangement of the hydrogen bond interactions in the chromophore vicinity, reshaping the symmetric distribution of van der Waals space to fine tune the GFP structure resulting from highly red-shifted rGFP.
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Affiliation(s)
- George Augustine
- Department of Biochemistry and Biotechnology , Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI) , Chennai 600 020 , India
| | - Sriram Raghavan
- Department of Crystallography and Biophysics , University of Madras , Chennai 600 025 , India
| | - Kamini NumbiRamudu
- Department of Biochemistry and Biotechnology , Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI) , Chennai 600 020 , India
| | | | | | | | - Krishnasamy Gunasekaran
- Department of Crystallography and Biophysics , University of Madras , Chennai 600 025 , India
| | - Chinju Govind
- Photosciences and Photonics Section, Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Thiruvananthapuram , 695 019 Kerala , India
| | - Venugopal Karunakaran
- Photosciences and Photonics Section, Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Thiruvananthapuram , 695 019 Kerala , India
| | - Niraikulam Ayyadurai
- Department of Biochemistry and Biotechnology , Council of Scientific and Industrial Research-Central Leather Research Institute (CSIR-CLRI) , Chennai 600 020 , India
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Zhang J, Wang M, Tang R, Liu Y, Lei C, Huang Y, Nie Z, Yao S. Transpeptidation-Mediated Assembly of Tripartite Split Green Fluorescent Protein for Label-Free Assay of Sortase Activity. Anal Chem 2018; 90:3245-3252. [DOI: 10.1021/acs.analchem.7b04756] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Juan Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Menglin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Rui Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Yanan Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Chunyang Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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Li H, Chang J, Gai P, Li F. Label-Free and Ultrasensitive Biomolecule Detection Based on Aggregation Induced Emission Fluorogen via Target-Triggered Hemin/G-Quadruplex-Catalyzed Oxidation Reaction. ACS APPLIED MATERIALS & INTERFACES 2018; 10:4561-4568. [PMID: 29337530 DOI: 10.1021/acsami.7b18676] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fluorescence biosensing strategy has drawn substantial attention due to their advantages of simplicity, convenience, sensitivity, and selectivity, but unsatisfactory structure stability, low fluorescence quantum yield, high cost of labeling, and strict reaction conditions associated with current fluorescence methods severely prohibit their potential application. To address these challenges, we herein propose an ultrasensitive label-free fluorescence biosensor by integrating hemin/G-quadruplex-catalyzed oxidation reaction with aggregation induced emission (AIE) fluorogen-based system. l-Cysteine/TPE-M, which is carefully and elaborately designed and developed, obviously contributes to strong fluorescence emission. In the presence of G-rich DNA along with K+ and hemin, efficient destruction of l-cysteine occurs due to hemin/G-quadruplex-catalyzed oxidation reactions. As a result, highly sensitive fluorescence detection of G-rich DNA is readily realized, with a detection limit down to 33 pM. As a validation for the further development of the proposed strategy, we also successfully construct ultrasensitive platforms for microRNA by incorporating the l-cysteine/TPE-M system with target-triggered cyclic amplification reaction. Thus, this proposed strategy is anticipated to find use in basic biochemical research and clinical diagnosis.
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Affiliation(s)
- Haiyin Li
- College of Chemistry and Pharmaceutical Sciences and ‡Key Laboratory of Applied Mycology of Shandong Province, Qingdao Agricultural University , Qingdao 266109, China
| | - Jiafu Chang
- College of Chemistry and Pharmaceutical Sciences and ‡Key Laboratory of Applied Mycology of Shandong Province, Qingdao Agricultural University , Qingdao 266109, China
| | - Panpan Gai
- College of Chemistry and Pharmaceutical Sciences and ‡Key Laboratory of Applied Mycology of Shandong Province, Qingdao Agricultural University , Qingdao 266109, China
| | - Feng Li
- College of Chemistry and Pharmaceutical Sciences and ‡Key Laboratory of Applied Mycology of Shandong Province, Qingdao Agricultural University , Qingdao 266109, China
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Feng G, Luo C, Yi H, Yuan L, Lin B, Luo X, Hu X, Wang H, Lei C, Nie Z, Yao S. DNA mimics of red fluorescent proteins (RFP) based on G-quadruplex-confined synthetic RFP chromophores. Nucleic Acids Res 2017; 45:10380-10392. [PMID: 28981852 PMCID: PMC5737560 DOI: 10.1093/nar/gkx803] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/26/2017] [Accepted: 08/31/2017] [Indexed: 12/29/2022] Open
Abstract
Red fluorescent proteins (RFPs) have emerged as valuable biological markers for biomolecule imaging in living systems. Developing artificial fluorogenic systems that mimic RFPs remains an unmet challenge. Here, we describe the design and synthesis of six new chromophores analogous to the chromophores in RFPs. We demonstrate, for the first time, that encapsulating RFP chromophore analogues in canonical DNA G-quadruplexes (G4) can activate bright fluorescence spanning red and far-red spectral regions (Em = 583-668 nm) that nearly match the entire RFP palette. Theoretical calculations and molecular dynamics simulations reveal that DNA G4 greatly restricts radiationless deactivation of chromophores induced by a twisted intramolecular charge transfer (TICT). These DNA mimics of RFP exhibit attractive photophysical properties comparable or superior to natural RFPs, including high quantum yield, large Stokes shifts, excellent anti-photobleaching properties, and two-photon fluorescence. Moreover, these RFP chromophore analogues are a novel and distinctive type of topology-selective G4 probe specific to parallel G4 conformation. The DNA mimics of RFP have been further exploited for imaging of target proteins. Using cancer-specific cell membrane biomarkers as targets, long-term real-time monitoring in single live cell and two-photon fluorescence imaging in tissue sections have been achieved without the need for genetic coding.
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Affiliation(s)
- Guangfu Feng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Chao Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Haibo Yi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Lin Yuan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Bin Lin
- Pharmaceutical Engineering & Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Xingyu Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Xiaoxiao Hu
- Molecular Science and Biomedicine laboratory, Hunan University, Changsha 410082, PR China
| | - Honghui Wang
- College of Biology, Hunan University, Changsha 410082, PR China
| | - Chunyang Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
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Chen F, Wang X, Cao X, Zhao Y. Accurate Electrochemistry Analysis of Circulating Methylated DNA from Clinical Plasma Based on Paired-End Tagging and Amplifications. Anal Chem 2017; 89:10468-10473. [PMID: 28810735 DOI: 10.1021/acs.analchem.7b02572] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Circulating methylated DNA has been a new kind of cancer biomarker, yet its small fraction of trace total DNA from clinical samples impairs the accurate analysis. Though fluorescence methods based on quantitative methylation specific PCR (qMSP) have been adopted routinely, yet alternative electrochemistry assay of such DNA from clinical samples remains a great challenge. Herein, we report accurate electrochemistry analysis of circulating methylated DNA from clinical plasma samples based on a paired-end tagging and amplifications strategy. Two DNA primers each labeled with digoxigenin (Dig) and biotin are designed for the recognition and amplification of methylated DNA. Paired-end tagging amplicons and avidin-HRP molecules are successively captured on the electrode modified with Anti-Dig. Then HRP executes catalytic reaction to generate amplified signal. The design of paired-end tagging can readily integrate downstream electrochemical amplified reaction, and two heterogeneous amplifications enable high assay sensitivity. As little as 40 pg of methylated genomic DNA (∼10 genomic equivalents) is well identified, and our strategy can even distinguish as low as 1% methylation level. Tumor-specific methylated DNA is clearly detected in the plasma of 10 of 11 NSCLC patients. The high clinical sensitivity of 91% (10/11) indicates the good consistency with clinical diagnosis. Excellent spatial control of electrochemistry allows simpler detection of more methylation patterns compared to fluorescence methods. The developed electrochemical assay is a promising liquid biopsy tool for the analysis of tumor-specific circulating DNA.
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Affiliation(s)
- Feng Chen
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University , Xi'an 710049, People's Republic of China
| | - Xuyao Wang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University , Xi'an 710049, People's Republic of China
| | - Xiaowen Cao
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University , Xi'an 710049, People's Republic of China
| | - Yongxi Zhao
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University , Xi'an 710049, People's Republic of China
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14
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Ultrasensitive chemiluminescence assay for the lung cancer biomarker cytokeratin 21-1 via a dual amplification scheme based on the use of encoded gold nanoparticles and a toehold-mediated strand displacement reaction. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2430-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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15
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Wang X, Chen F, Zhang D, Zhao Y, Wei J, Wang L, Song S, Fan C, Zhao Y. Single copy-sensitive electrochemical assay for circulating methylated DNA in clinical samples with ultrahigh specificity based on a sequential discrimination-amplification strategy. Chem Sci 2017; 8:4764-4770. [PMID: 28959399 PMCID: PMC5603958 DOI: 10.1039/c7sc01035d] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 05/15/2017] [Indexed: 12/18/2022] Open
Abstract
Tumor-related circulating methylated DNA represents only a small fraction of the total DNA in clinical samples (e.g. plasma), challenging the accurate analysis of specific DNA methylation patterns. Yet conventional assays based on the real-time quantitative methylation-specific PCR (qMSP) are generally limited in detection sensitivity and specificity due to its non-specific amplification interference including primer dimers and off-target amplification. Here we propose a single copy-sensitive electrochemical assay for circulating methylated DNA with ultrahigh specificity on the basis of a sequential discrimination-amplification strategy. Methylated DNA rather than unmethylated DNA in a bisulfite-modified sample is identified and amplified by the asymmetric MSP to generate abundant biotin-labeled single-stranded amplicons with reduced primer-dimer artifacts. Self-assembled tetrahedral DNA probes, which are readily decorated on an electrode surface as nanostructured probes with ordered orientation and well controlled spacing, enable the highly efficient hybridization of the specific single-stranded amplicons due to greatly increased target accessibility and significantly decreased noise. The interfacial hybridization event is quantitatively translated into electrochemical signals utilizing an enzymatic amplification. The proposed assay integrates dual sequence discrimination processes and cascade signal amplification processes, achieving the identification of as few as one methylated DNA molecule in the presence of a 1000-fold excess of unmethylated alleles. Furthermore, the excellent assay performance enables tumor related methylation detection in lung cancer patients with 200 microlitre plasma samples. The results are in good consistency with those of clinical diagnosis, whereas the conventional qMSP failed to detect the corresponding methylation pattern of these clinically confirmed positive patients in such trace amounts of samples.
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Affiliation(s)
- Xuyao Wang
- Key Laboratory of Biomedical Information Engineering of Education Ministry , School of Life Science and Technology , Xi'an Jiaotong University , Xianning West Road , Xi'an , Shaanxi 710049 , P. R. China .
| | - Feng Chen
- Key Laboratory of Biomedical Information Engineering of Education Ministry , School of Life Science and Technology , Xi'an Jiaotong University , Xianning West Road , Xi'an , Shaanxi 710049 , P. R. China .
| | - Dexin Zhang
- Department of Respiratory Medicine , The Second Affiliated Hospital of Medical College , Xi'an Jiaotong University , Xiwu Road , Xi'an , Shaanxi 710049 , P. R. China
| | - Yue Zhao
- Key Laboratory of Biomedical Information Engineering of Education Ministry , School of Life Science and Technology , Xi'an Jiaotong University , Xianning West Road , Xi'an , Shaanxi 710049 , P. R. China .
| | - Jing Wei
- Key Laboratory of Biomedical Information Engineering of Education Ministry , School of Life Science and Technology , Xi'an Jiaotong University , Xianning West Road , Xi'an , Shaanxi 710049 , P. R. China .
| | - Lihua Wang
- Division of Physical Biology , 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 , P. R. China
| | - Shiping Song
- Division of Physical Biology , 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 , P. R. China
| | - Chunhai Fan
- Division of Physical Biology , 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 , P. R. China
| | - Yongxi Zhao
- Key Laboratory of Biomedical Information Engineering of Education Ministry , School of Life Science and Technology , Xi'an Jiaotong University , Xianning West Road , Xi'an , Shaanxi 710049 , P. R. China .
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16
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Zhao K, Tang Y, Wang Z, Zhang J, Lei C, Wang H, Li H, Huang Y, Nie Z, Yao S. Surface charge tuneable fluorescent protein-based logic gates for smart delivery of nucleic acids. Chem Commun (Camb) 2017; 53:11326-11329. [DOI: 10.1039/c7cc06833f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A versatile bio-logic system based on H39GFP is operated in living cells with transfection of functional nucleic acids as the readout.
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17
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A MoS₂ Nanosheet-Based Fluorescence Biosensor for Simple and Quantitative Analysis of DNA Methylation. SENSORS 2016; 16:s16101561. [PMID: 27669248 PMCID: PMC5087350 DOI: 10.3390/s16101561] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/24/2016] [Accepted: 07/06/2016] [Indexed: 12/28/2022]
Abstract
MoS2 nanomaterial has unique properties, including innate affinity with ss-DNA and quenching ability for fluorescence dyes. Here, we present the development of a simple fluorescence biosensor based on water-soluble MoS2 nanosheets and restriction endonuclease BstUI for methylation analysis of p16 promoter. The biosensing platform exhibited excellent sensitivity in detecting DNA with a linear range of 100 pM~20 nM and a detection limit of 140 pM. More importantly, our method could distinguish as low as 1% difference in methylation level. Compared with previous methylation analysis, our design is both time saving and simple to operate, avoiding the limitations of PCR-based assays without compromising performance.
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18
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Label-free DNA Y junction for bisphenol A monitoring using exonuclease III-based signal protection strategy. Biosens Bioelectron 2016; 77:277-83. [DOI: 10.1016/j.bios.2015.09.042] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/17/2015] [Accepted: 09/18/2015] [Indexed: 12/20/2022]
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19
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Emerging landscape of cell penetrating peptide in reprogramming and gene editing. J Control Release 2016; 226:124-37. [DOI: 10.1016/j.jconrel.2016.02.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 12/11/2022]
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20
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Liu Z, Lei C, Deng H, Lu G, Huang Y, Yao S. Sensitive and versatile fluorescent enzymatic assay of nucleases and DNA methyltransferase based on a supercharged fluorescent protein. RSC Adv 2016. [DOI: 10.1039/c6ra02711c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The ScGFP-based platform takes advantage of the DNA length-dependent binding affinity between ScGFP and DNA for multiple DNA enzyme detection including nucleases and DNA MTase.
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Affiliation(s)
- Zhuoliang Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Chunyang Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Honghua Deng
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Guoyan Lu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
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21
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Lu M, Xu L, Zhang X, Xiao R, Wang Y. Ag(I)-coordinated hairpin DNA for homogenous electronic monitoring of hepatitis C virus accompanying isothermal cycling signal amplification strategy. Biosens Bioelectron 2015; 73:195-201. [DOI: 10.1016/j.bios.2015.05.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/07/2015] [Accepted: 05/26/2015] [Indexed: 12/18/2022]
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22
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Wang W, Han N, Li R, Han W, Zhang X, Li F. Supercharged Fluorescent Protein as a Versatile Probe for the Detection of Glycosaminoglycans in Vitro and in Vivo. Anal Chem 2015; 87:9302-7. [DOI: 10.1021/acs.analchem.5b02071] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Wenshuang Wang
- National
Glycoengineering Research Center and State Key Laboratory of Microbial
Technology, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Naihan Han
- National
Glycoengineering Research Center and State Key Laboratory of Microbial
Technology, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Ruijuan Li
- Key
Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education,
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, P. R. China
| | - Wenjun Han
- National
Glycoengineering Research Center and State Key Laboratory of Microbial
Technology, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Xiaoru Zhang
- Key
Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education,
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, P. R. China
| | - Fuchuan Li
- National
Glycoengineering Research Center and State Key Laboratory of Microbial
Technology, Shandong University, Jinan, Shandong 250100, P. R. China
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23
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Zang Y, Lei J, Ling P, Ju H. Catalytic Hairpin Assembly-Programmed Porphyrin–DNA Complex as Photoelectrochemical Initiator for DNA Biosensing. Anal Chem 2015; 87:5430-6. [DOI: 10.1021/acs.analchem.5b00888] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yang Zang
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Jianping Lei
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Pinghua Ling
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Huangxian Ju
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
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24
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Lei C, Wang Z, Nie Z, Deng H, Hu H, Huang Y, Yao S. Resurfaced fluorescent protein as a sensing platform for label-free detection of copper(II) ion and acetylcholinesterase activity. Anal Chem 2015; 87:1974-80. [PMID: 25560517 DOI: 10.1021/ac504390e] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Protein engineering by resurfacing is an efficient approach to provide new molecular toolkits for biotechnology and bioanalytical chemistry. H39GFP is a new variant of green fluorescent protein (GFP) containing 39 histidine residues in the primary sequence that was developed by protein resurfacing. Herein, taking H39GFP as the signal reporter, a label-free fluorometric sensor for Cu(2+) sensing was developed based on the unique multivalent metal ion-binding property of H39GFP and fluorescence quenching effect of Cu(2+) by electron transfer. The high affinity of H39GFP with Cu(2+) (Kd, 16.2 nM) leads to rapid detection of Cu(2+) in 5 min with a low detection limit (50 nM). Using acetylthiocholine (ATCh) as the substrate, this H39GFP/Cu(2+) complex-based sensor was further applied for the turn-on fluorescence detection of acetylcholinesterase (AChE) activity. The assay was based on the reaction between Cu(2+) and thiocholine, the hydrolysis product of ATCh by AChE. The proposed sensor is highly sensitive (limit of detection (LOD) = 0.015 mU mL(-1)) and is feasible for screening inhibitors of AChE. Furthermore, the practicability of this method was demonstrated by the detection of pesticide residue (carbaryl) in real food samples. Hence, the successful applications of H39GFP in the detection of metal ion and enzyme activity present the prospect of resurfaced proteins as versatile biosensing platforms.
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Affiliation(s)
- Chunyang Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University , Changsha 410082, P. R. China
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25
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Sun AL, Jia FC, Zhang YF, Wang XN. Hybridization-induced Ag(i) dissociation from an immobilization-free and label-free hairpin DNA: toward a novel electronic monitoring platform. Analyst 2015; 140:2634-7. [DOI: 10.1039/c5an00046g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel silver ion-assisted hairpin DNA through C–Ag+–C coordination chemistry was designed for homogeneous electronic monitoring of HIV DNA on a negatively charged electrode, based on hybridization-induced Ag+ dissociation from hairpin DNA.
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Affiliation(s)
- Ai-Li Sun
- Department of Chemistry and Chemical Engineering
- Xinxiang University
- Xinxiang 453000
- P. R. China
| | - Feng-Chun Jia
- Henan Mechanical and Electrical Engineering College
- Department of Electrical Engineering
- Xinxiang 453000
- P. R. China
| | - Yan-Fang Zhang
- Department of Chemistry and Chemical Engineering
- Xinxiang University
- Xinxiang 453000
- P. R. China
| | - Xuan-Nian Wang
- Department of Chemistry and Chemical Engineering
- Xinxiang University
- Xinxiang 453000
- P. R. China
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26
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Tang S, Nie Z, Li W, Li D, Huang Y, Yao S. A poly(ADP-ribose) polymerase-1 activity assay based on the FRET between a cationic conjugated polymer and supercharged green fluorescent protein. Chem Commun (Camb) 2015; 51:14389-92. [DOI: 10.1039/c5cc04170h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A label-free strategy for PARP-1 activity assay and inhibitors assessment has been developed based on the FRET between a cationic conjugated polymer (CCP) and supercharged green fluorescent protein (scGFP).
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Affiliation(s)
- Shiyun Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Wang Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Daiqi Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
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27
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Wang Z, Li Y, Li L, Li D, Huang Y, Nie Z, Yao S. DNA-mediated supercharged fluorescent protein/graphene oxide interaction for label-free fluorescence assay of base excision repair enzyme activity. Chem Commun (Camb) 2015. [DOI: 10.1039/c5cc04759e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The interaction between supercharged green fluorescent protein (ScGFP) and graphene oxide (GO) as well as the resulting quenching effect of GO on ScGFP were investigated.
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Affiliation(s)
- Zhen Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Yong Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Lijun Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Daiqi Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Yan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Zhou Nie
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
| | - Shouzhuo Yao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
- P. R. China
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28
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Wang Y, Wee EJH, Trau M. Highly sensitive DNA methylation analysis at CpG resolution by surface-enhanced Raman scattering via ligase chain reaction. Chem Commun (Camb) 2015; 51:10953-6. [DOI: 10.1039/c5cc03921e] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly sensitive DNA methylation analysis at CpG resolution is demonstrated by employing SERS nanotags via ligase chain reaction (LCR) and validated with sequencing.
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Affiliation(s)
- Yuling Wang
- Centre for Personalized NanoMedicine
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- Corner College and Cooper Roads (Bldg 75)
- Australia
| | - Eugene J. H. Wee
- Centre for Personalized NanoMedicine
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- Corner College and Cooper Roads (Bldg 75)
- Australia
| | - Matt Trau
- Centre for Personalized NanoMedicine
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- Corner College and Cooper Roads (Bldg 75)
- Australia
- School of Chemistry and Molecular Biosciences
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29
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Chen J, Zhou S, Wen J. Concatenated Logic Circuits Based on a Three-Way DNA Junction: A Keypad-Lock Security System with Visible Readout and an Automatic Reset Function. Angew Chem Int Ed Engl 2014; 54:446-50. [DOI: 10.1002/anie.201408334] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 10/27/2014] [Indexed: 12/19/2022]
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30
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Chen J, Zhou S, Wen J. Concatenated Logic Circuits Based on a Three-Way DNA Junction: A Keypad-Lock Security System with Visible Readout and an Automatic Reset Function. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408334] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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