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Su R, Li Z, Yang C, Li Y, Wang J, Sun C. Fluorescent aptasensors for sensitive detection of lead ions based on structure-switching DNA beacon probe and exonuclease I-mediated signal amplification. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 320:124643. [PMID: 38901233 DOI: 10.1016/j.saa.2024.124643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 04/22/2024] [Accepted: 06/10/2024] [Indexed: 06/22/2024]
Abstract
Herein, two simple fluorescent signal-on sensing strategies for detecting lead ions (Pb2+) were established based on structure-switching aptamer probes and exonuclease-assisted signal amplification strategies. Two hairpin-structure fluorescent probes with blunt-ended stem arms were designed by extending the base sequence of Pb2+ aptamer (PS2.M) and labelling the probes with FAM (in probe 1) and 2-aminopurine (2-AP) (in probe 2), respectively. In method 1, graphene oxide (GO) was added to adsorb probe 1 and quench the fluorescence emission of FAM to achieve low fluorescent background. In method 2, fluorescent 2-AP molecule inserted into the double-stranded DNA of probe 2 was quenched as a result of base stacking interactions, leading to a simplified, quencher-free approach. The addition of Pb2+ can induce the probes to transform into G-quadruplex structures, exposing single DNA strands at the 3' end (the extended sequences). This exposure enables the activation of exonuclease I (Exo I) on the probes, leading to the cleavage effect and subsequent release of free bases and fluorophores, thereby resulting in amplified fluorescence signals. The two proposed methods exhibit good specificity and sensitivity, with detection limits of 0.327 nM and 0.049 nM Pb2+ for method 1 and method 2, respectively, and have been successfully applied to detect Pb2+ in river water and fish samples. Both detection methods employ the structure-switching aptamer probes and can be completed in two or three steps without the need for complex analytical instruments. Therefore, they have a broad prospect in the sensitive and simple detection of lead ion contamination in food and environmental samples.
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Affiliation(s)
- Ruifang Su
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, China
| | - Zhihong Li
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, China
| | - Chuanyu Yang
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, China
| | - Ying Li
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, China
| | - Junyang Wang
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, China.
| | - Chunyan Sun
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, China; Chongqing Research Institute, Jilin University, Chongqing 401123, China.
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2
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Graphene Biosensors-A Molecular Approach. NANOMATERIALS 2022; 12:nano12101624. [PMID: 35630845 PMCID: PMC9145856 DOI: 10.3390/nano12101624] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 12/19/2022]
Abstract
Graphene is the material elected to study molecules and monolayers at the molecular scale due to its chemical stability and electrical properties. The invention of scanning tunneling microscopy has deepened our knowledge on molecular systems through imaging at an atomic resolution, and new possibilities have been investigated at this scale. Interest on studies on biomolecules has been demonstrated due to the possibility of mimicking biological systems, providing several applications in nanomedicine: drug delivery systems, biosensors, nanostructured scaffolds, and biodevices. A breakthrough came with the synthesis of molecular systems by stepwise methods with control at the atomic/molecular level. This article presents a review on self-assembled monolayers of biomolecules on top of graphite with applications in biodevices. Special attention is given to porphyrin systems adsorbed on top of graphite that are able to anchor other biomolecules.
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3
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Label-free exonuclease I-assisted signal amplification colorimetric sensor for highly sensitive detection of kanamycin. Food Chem 2021; 347:128988. [PMID: 33465686 DOI: 10.1016/j.foodchem.2020.128988] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 12/17/2020] [Accepted: 12/29/2020] [Indexed: 12/23/2022]
Abstract
A label-free colorimetric method based on exonuclease I (Exo I)-assisted signal amplification with protamine as a medium was developed for analysis of kanamycin. In this study, a double-stranded DNA (dsDNA) probe was tailored by manipulating an aptamer and its complementary DNA (cDNA) ensuring detection of target with high selectivity and excellent sensitivity. Herein, protamine could not only combine with negatively charged gold nanoparticles but also interaction with polyanion DNA. Upon addition of target kanamycin, the target-aptamer complex was formed and the cDNA was released. Thus, both aptamer and cDNA could be digested by Exo I, and the captured kanamycin was liberated for triggering target recycling and signal amplification. Under optimized conditions, the proposed colorimetric method realized a low detection limit of 2.8 × 10-14 M along with a wide linear range plus excellent selectivity. Our strategy exhibited enormous potentials for fabricate various kinds of biosensors based on target-induced aptamer configuration changes.
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4
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Development and optimization of a new hybrid chitosan-grafted graphene oxide/magnetic nanoparticle system for theranostic applications. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114515] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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5
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Shu Q, Liao F, Hong N, Cheng L, Lin Y, Cui H, Su J, Ma G, Wei G, Zhong Y, Xiong J, Fan H. A novel DNA sensor of homogeneous electrochemical signal amplification strategy. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104777] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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6
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Abstract
Chymotrypsin is one of the most extensively known proteases participating in the pathogenesis of various diseases, which can be used in drug discovery and clinical diagnosis.
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Affiliation(s)
- Haixia Shi
- P. E. Department
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Cheng Liu
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Jingjie Cui
- School of Automation
- Hangzhou Dianzi University
- Hangzhou
- P. R. China
| | - Jia Cheng
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Yuanwei Lin
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Li Gao
- School of Life Sciences
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Rong Luo
- Institute of Geriatric Cardiovascular Disease
- Chengdu Medical College
- Chengdu
- China
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7
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A novel electrochemical aptasensor for fumonisin B 1 determination using DNA and exonuclease-I as signal amplification strategy. BMC Chem 2019; 13:129. [PMID: 31728456 PMCID: PMC6842194 DOI: 10.1186/s13065-019-0646-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 10/30/2019] [Indexed: 12/15/2022] Open
Abstract
In this work, using DNA and exonuclease-I (Exo-I) as signal amplification strategy, a novel and facile electrochemical aptasensor was constructed for fumonisin B1 (FB1) detection. The G-rich complementary DNA (cDNA) was immobilized onto the electrode surface. Then, aptamer of FB1 was hybridized with cDNA to form double-stranded DNA. In the absence of FB1, double-stranded DNA and G-rich cDNA on the electrode surface promoted effectively methylene blue (MB) enrichment and amplified the initial electrochemical response. In the presence of FB1, the combination of aptamer and FB1 led to the release of aptamer from the electrode surface and the expose of 3' end of single-stranded cDNA. When Exo-I was added onto the electrode surface, the single-stranded cDNA was degraded in the 3'-5' direction. The decrease of double-stranded DNA and G-rich cDNA resulted in the less access of MB to the electrode surface, which decreased the electrochemical signal. The experimental conditions including incubation time of FB1, the amount of Exo-I and incubation time of Exo-I were optimized. Under the optimal conditions, the linear relationship between the change of peak current and the logarithmic concentration of FB1 was observed in the range of 1.0 × 10-3-1000 ng mL-1 with a low limit of detection of 0.15 pg mL-1. The experimental results showed that the prepared aptasensor had acceptable specificity, reproducibility, repeatability and stability. Therefore, this proposed aptasensor has a potential application in the food safety detection.
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8
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Zhan Z, Yu B, Li H, Yan L, Aguilar ZP, Xu H. Catalytic hairpin assembly combined with graphene oxide for the detection of emetic Bacillus cereus in milk. J Dairy Sci 2019; 102:4945-4953. [DOI: 10.3168/jds.2018-15812] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 02/03/2019] [Indexed: 11/19/2022]
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9
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Wang L, Wu A, Wei G. Graphene-based aptasensors: from molecule-interface interactions to sensor design and biomedical diagnostics. Analyst 2019. [PMID: 29528071 DOI: 10.1039/c8an00081f] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Graphene-based nanomaterials have been widely utilized to fabricate various biosensors for environmental monitoring, food safety, and biomedical diagnostics. The combination of aptamers with graphene for creating biofunctional nanocomposites improved the sensitivity and selectivity of fabricated biosensors due to the unique molecular recognition and biocompatibility of aptamers. In this review, we highlight recent advances in the design, fabrication, and biomedical sensing application of graphene-based aptasensors within the last five years (2013-current). The typical studies on the biomedical fluorescence, colorimetric, electrochemical, electrochemiluminescence, photoelectrochemical, electronic, and force-based sensing of DNA, proteins, enzymes, small molecules, ions, and others are demonstrated and discussed in detail. More attention is paid to a few key points such as the conjugation of aptamers with graphene materials, the fabrication strategies of sensor architectures, and the importance of aptamers on improving the sensing performances. It is expected that this work will provide preliminary and useful guidance for readers to understand the fabrication of graphene-based biosensors and the corresponding sensing mechanisms in one way, and in another way will be helpful to develop novel high performance aptasensors for biological analysis and detection.
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Affiliation(s)
- Li Wang
- Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, P. R. China.
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Krishnan SK, Singh E, Singh P, Meyyappan M, Nalwa HS. A review on graphene-based nanocomposites for electrochemical and fluorescent biosensors. RSC Adv 2019; 9:8778-8881. [PMID: 35517682 PMCID: PMC9062009 DOI: 10.1039/c8ra09577a] [Citation(s) in RCA: 264] [Impact Index Per Article: 52.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 02/15/2019] [Indexed: 12/16/2022] Open
Abstract
Biosensors with high sensitivity, selectivity and a low limit of detection, reaching nano/picomolar concentrations of biomolecules, are important to the medical sciences and healthcare industry for evaluating physiological and metabolic parameters.
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Affiliation(s)
- Siva Kumar Krishnan
- CONACYT-Instituto de Física
- Benemérita Universidad Autónoma de Puebla
- Puebla 72570
- Mexico
| | - Eric Singh
- Department of Computer Science
- Stanford University
- Stanford
- USA
| | - Pragya Singh
- Department of Electrical Engineering and Computer Science
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Meyya Meyyappan
- Center for Nanotechnology
- NASA Ames Research Center
- Moffett Field
- Mountain View
- USA
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11
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Fabrication of fluorescent biosensing platform based on graphene oxide-DNA and their application in biomolecule detection. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.07.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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12
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Tan J, Lai Z, Zhong L, Zhang Z, Zheng R, Su J, Huang Y, Huang P, Song H, Yang N, Zhou S, Zhao Y. A Graphene Oxide-Based Fluorescent Aptasensor for the Turn-on Detection of CCRF-CEM. NANOSCALE RESEARCH LETTERS 2018; 13:66. [PMID: 29605867 PMCID: PMC5878827 DOI: 10.1186/s11671-017-2403-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 12/05/2017] [Indexed: 06/08/2023]
Abstract
A convenient, low-cost, and highly sensitive fluorescent aptasensor for detection of leukemia has been developed based on graphene oxide-aptamer complex (GO-apt). Graphene oxide (GO) can absorb carboxyfluorescein-labeled Sgc8 aptamer (FAM-apt) by π-π stacking and quench the fluorescence through fluorescence resonance energy transfer (FRET). In the absence of Sgc8 target cell CCRF-CEM, the fluorescence is almost all quenched. Conversely, when the CCRF-CEM cells are added, the quenched fluorescence can be recovered rapidly and significantly. Therefore, based on the change of fluorescence signals, we can detect the number of CCRF-CEM cells in a wide range from 1 × 102 to 1 × 107 cells/mL with a limit of detection (LOD) of 10 cells/mL. Therefore, this strategy of graphene oxide-based fluorescent aptasensor may be promising for the detection of cancer.
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Affiliation(s)
- Jie Tan
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Zongqiang Lai
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Liping Zhong
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Zhenghua Zhang
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Rong Zheng
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Jing Su
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Yong Huang
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Panpan Huang
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Hui Song
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Nuo Yang
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Sufang Zhou
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
| | - Yongxiang Zhao
- National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021 China
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13
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Selection of specific aptamer against enrofloxacin and fabrication of graphene oxide based label-free fluorescent assay. Anal Biochem 2018; 549:124-129. [PMID: 29574118 DOI: 10.1016/j.ab.2018.03.021] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 01/29/2023]
Abstract
Specific ssDNA aptamers for the antibiotic enrofloxacin (ENR) were isolated from an enriched nucleotide library by SELEX (Systematic Evolution of Ligands by EXponential enrichment) method with high binding affinity. After seven rounds, five aptamers were selected and identified. Apt58 with highest affinity and sensitivity (Kd = 14.19 nM) was employed to develop a label-free fluorescent biosensing approach based on aptamer, graphene oxide (GO) and native fluorescence of ENR for determination of ENR residue in raw milk samples. Under optimized experimental conditions, the linear range was from 5 nM to 250 nM and LOD was calculated to be 3.7 nM, and the recovery rate was between 94.1% and 108.5%. The integration of aptamer and GO in this bioassay provides a promising way for rapid, sensitive and cost-effective detection of ENR in real samples like raw milk.
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14
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Li S, Gu Y, Lyu Y, Jiang Y, Liu P. Integrated Graphene Oxide Purification-Lateral Flow Test Strips (iGOP-LFTS) for Direct Detection of PCR Products with Enhanced Sensitivity and Specificity. Anal Chem 2017; 89:12137-12144. [PMID: 29072445 DOI: 10.1021/acs.analchem.7b02769] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An integrated graphene oxide purification-lateral flow test strip (iGOP-LFTS) was developed for on-strip purifying and visually detecting polymerase chain reaction (PCR) products with an improved sensitivity as well as a more stringent specificity. PCR products amplified with a pair of biotin- and digoxin-labeled primers were directly pipetted onto GO pads, on which graphene oxide selectively adsorbed residual primers and primer-dimers with the aid of a running buffer containing MgCl2 and Tween 20. By stacking up three GO pads to increase the surface area for adsorption, 83.4% of double-stranded DNA with a length of 30 bp and 98.6% of 20-nt primers could be removed from a 10-μL DNA mixture. Since no primers interfered with detection, the increase of the sample loading volume from 5 to 20 μL could improve the signal-to-noise ratio of the test line 1.6 fold using the iGOP-LFTS while no changes were observed using the conventional LFTS. The limit of detection of the iGOP-LFTS was determined to be 30 copies of bacteriophage λ-DNA with naked eyes and this limit could be further decreased to 3 copies by loading 20 μL of the sample, which corresponded to a 1000-fold improvement compared to that of the LFTS detected by naked eyes. When the ImageJ analysis was employed, a 100-fold decrease of the detection limit can be obtained. In addition, due to the removal of the primer-dimers, the dim test line observed in the negative control of the LFTS was eliminated using the iGOP-LFTS. A mock clinical specimen spiked with defective HIV-1 (human immunodeficiency virus) viruses was successfully analyzed using a two-step reverse transcription-PCR with 30 amplification cycles followed by the iGOP-LFTS detection. These significant improvements were achieved without introducing any additional hands-on operations and instrumentations.
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Affiliation(s)
- Shanglin Li
- Department of Biomedical Engineering, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University , Beijing, 100084, China
| | - Yin Gu
- Department of Biomedical Engineering, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University , Beijing, 100084, China
| | - Yi Lyu
- National HIV/HCV Reference Laboratory, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention , Beijing, 102206, China
| | - Yan Jiang
- National HIV/HCV Reference Laboratory, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention , Beijing, 102206, China
| | - Peng Liu
- Department of Biomedical Engineering, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University , Beijing, 100084, China
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15
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Hu R, Zhang X, Xu Q, Lu DQ, Yang YH, Xu QQ, Ruan Q, Mo LT, Zhang XB. A universal aptameric biosensor: Multiplexed detection of small analytes via aggregated perylene-based broad-spectrum quencher. Biosens Bioelectron 2017; 92:40-46. [PMID: 28187297 DOI: 10.1016/j.bios.2017.01.051] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 01/08/2017] [Accepted: 01/23/2017] [Indexed: 12/12/2022]
Abstract
A universal aptameric system based on the taking advantage of double-stranded DNA/perylene diimide (dsDNA/PDI) as the signal probe was developed for multiplexed detection of small molecules. Aptamers are single-stranded DNA or RNA oligonucleotides which are selected in vitro by a process known as systematic evolution of ligands by exponential enrichment. In this work, we synthesized a new kind of PDI and reported this aggregated PDI could quench the double-stranded DNA (dsDNA)-labeled fluorophores with a high quenching efficiency. The quenching efficiencies on the fluorescence of FAM, TAMRA and Cy5 could reach to 98.3%±0.9%, 97.2%±0.6% and 98.1%±1.1%, respectively. This broad-spectrum quencher was then adopted to construct a multicolor biosensor via a label-free approach. A structure-switching-triggered enzymatic recycling amplification was employed for signal amplification. High quenching efficiency combined with autocatalytic target recycling amplification afforded the biosensor with high sensitivity towards small analytes. For other targets, changing the corresponding aptamer can achieve the goal. The quencher did not interfere with the catalytic activity of nuclease. The biosensor could be manipulated with similar sensitivity no matter in pre-addition or post-addition manner. Moreover, simultaneous and multiplexed analysis of several small molecules in homogeneous solution was achieved, demonstrating its potential application in the rapid screening of multiple biotargets.
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Affiliation(s)
- Rong Hu
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, Yunnan, PR China.
| | - Xi Zhang
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, Yunnan, PR China
| | - Qiang Xu
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, Yunnan, PR China
| | - Dan-Qing Lu
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theronastics, Hunan University, Changsha 410082, China
| | - Yun-Hui Yang
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, Yunnan, PR China
| | - Quan-Qing Xu
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, Yunnan, PR China
| | - Qiong Ruan
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, Yunnan, PR China
| | - Liu-Ting Mo
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theronastics, Hunan University, Changsha 410082, China
| | - Xiao-Bing Zhang
- Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Collaborative Innovation Center for Molecular Engineering for Theronastics, Hunan University, Changsha 410082, China
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16
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DNA adsorbed on graphene and graphene oxide: Fundamental interactions, desorption and applications. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.09.001] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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17
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Affiliation(s)
- Jungho Kim
- Center for RNA Research, Institute for Basic Science (IBS), Seoul National University , Seoul 08826, Korea.,Department of Chemistry, Seoul National University , Seoul 08826, Korea
| | - Se-Jin Park
- Center for RNA Research, Institute for Basic Science (IBS), Seoul National University , Seoul 08826, Korea.,Department of Chemistry, Seoul National University , Seoul 08826, Korea
| | - Dal-Hee Min
- Center for RNA Research, Institute for Basic Science (IBS), Seoul National University , Seoul 08826, Korea.,Department of Chemistry, Seoul National University , Seoul 08826, Korea.,Institute of Nanobio Convergence Technology, Lemonex Inc., Seoul 08826, Korea
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18
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Affiliation(s)
- Yan Du
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, Jilin China
| | - Shaojun Dong
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, Jilin China
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Li S, Fu Y, Ma X, Zhang Y. Label-free fluorometric detection of chymotrypsin activity using graphene oxide/nucleic-acid-stabilized silver nanoclusters hybrid materials. Biosens Bioelectron 2016; 88:210-216. [PMID: 27561443 DOI: 10.1016/j.bios.2016.08.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 08/01/2016] [Accepted: 08/11/2016] [Indexed: 01/17/2023]
Abstract
Pancreatic function tests are used to determine the presence of chronic pancreatitis, particularly in the early stage of the disease. Chymotrypsin is an indicator of pancreatic function and is thus related to pancreatic diseases. A new fluorescent biosensing method for assay of chymotrypsin activity was developed using DNA (dC12)-templated silver nanoclusters and graphene oxide (GO). A peptide probe was also designed using chymotrypsin-cleavable amino acid sequence and a cysteine terminus. The peptide probe formed Ag-S bond to dC12-AgNCs to enhance the fluorescence of dC12-AgNCs. After the addition of GO, the peptide was adsorbed to the negative GO surface and the fluorescence of dC12-AgNCs was quenched by FRET. The peptide was then degraded into amino acid fragments upon addition of chymotrypsin; these fragments were released from the GO surface, and the FRET was terminated. The developed label-free method features lower cost and higher sensitivity to chymotrypsin activity assay compared with conventional fluorescence analysis. The method can be used to analyze chymotrypsin (as low as 3ng/mL, signal/noise =3) across a dynamic range of 0.0-50.0ng/mL. The proposed biosensing strategy can also be extended to other proteases by using different peptide substrates.
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Affiliation(s)
- Shuangqin Li
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China
| | - Yuewei Fu
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China
| | - Xuejuan Ma
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China
| | - Yaodong Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062 PR China.
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Zhao Q, Zhou Y, Li Y, Gu W, Zhang Q, Liu J. Luminescent Iridium(III) Complex Labeled DNA for Graphene Oxide-Based Biosensors. Anal Chem 2016; 88:1892-9. [DOI: 10.1021/acs.analchem.5b04324] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Qingcheng Zhao
- Jiangsu
Key Laboratory for Carbon-Based Functional Materials and Devices,
Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative
Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yuyang Zhou
- Jiangsu
Key Laboratory of Environmental Functional Materials, School of Chemistry,
Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Yingying Li
- Jiangsu
Key Laboratory for Carbon-Based Functional Materials and Devices,
Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative
Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Wei Gu
- Jiangsu
Key Laboratory for Carbon-Based Functional Materials and Devices,
Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative
Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Qi Zhang
- Jiangsu
Key Laboratory for Carbon-Based Functional Materials and Devices,
Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative
Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
| | - Jian Liu
- Jiangsu
Key Laboratory for Carbon-Based Functional Materials and Devices,
Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative
Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China
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