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Li H, Du C, Guo T, Zhou H, Zhou Y, Huang X, Zhang YH, Wang S, Liu X, Ma L. Ratiometric electrochemical aptasensor based on split aptamer and Au-rGO for detection of aflatoxin M1. J Dairy Sci 2024; 107:2748-2759. [PMID: 38101746 DOI: 10.3168/jds.2023-23864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 11/16/2023] [Indexed: 12/17/2023]
Abstract
A novel ratiometric electrochemical aptasensor based on split aptamer and Au-reduced graphene oxide (Au-rGO) nanomaterials was proposed to detect aflatoxin M1 (AFM1). In this work, Au-rGO nanomaterials were coated on the electrode through the electrodeposition method to increase the aptamer enrichment. We split the aptamer of AFM1 into 2 sequences (S1 and S2), where S1 was immobilized on the electrode due to the Au-S bond, and S2 was tagged with methylene blue (MB) and acted as a response signal. A complementary strand to S1 (CS1) labeled with ferrocene (Fc) was introduced as another reporter. In the presence of AFM1, CS1 was released from the electrode surface due to the formation of the S1-AFM1-S2 complex, leading to a decrease in Fc and an increase in the MB signal. The developed ratiometric aptasensor exhibited a linear range of 0.03 μg L-1 to 2.00 μg L-1, with a detection limit of 0.015 μg L-1 for AFM1 detection. The ratiometric aptasensor also showed a linear relationship from 0.2 μg L-1 to 1.00 μg L-1, with a detection limit of 0.05 μg L-1 in natural milk after sample pretreatment, indicating the successful application of the developed ratiometric aptasensor. Our proposed strategy provides a new way to construct aptasensors with high sensitivity and selectivity.
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Affiliation(s)
- Honglin Li
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Congcong Du
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Ting Guo
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China; Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China
| | - Hongyuan Zhou
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China; Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China
| | - Ying Zhou
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China; Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China
| | - Xinrui Huang
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Yu Hao Zhang
- College of Food Science, Southwest University, Chongqing 400715, China; Key Laboratory of Luminescence Analysis and Molecular Sensing, Southwest University, Ministry of Education, Chongqing 400715, China; Key Laboratory of Condiment Supervision Technology for State Market Regulation, Chongqing 400715, China
| | - Shuo Wang
- College of Food Science, Southwest University, Chongqing 400715, China; School of Medicine, Nankai University, Tianjin 300071, China
| | - Xiaozhu Liu
- Foshan Micro Miracles Biotechnology Company, Guangdong 528000, China
| | - Liang Ma
- College of Food Science, Southwest University, Chongqing 400715, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China; Key Laboratory of Quality and Safety Control of Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400712, China; Key Laboratory of Condiment Supervision Technology for State Market Regulation, Chongqing 400715, China.
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Ye H, Yang Z, Khan IM, Niazi S, Guo Y, Wang Z, Yang H. Split aptamer acquisition mechanisms and current application in antibiotics detection: a short review. Crit Rev Food Sci Nutr 2022; 63:9098-9110. [PMID: 35507474 DOI: 10.1080/10408398.2022.2064810] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Antibiotic contamination is becoming a prominent global issue. Therefore, sensitive, specific and simple technology is desirable the demand for antibiotics detection. Biosensors based on split aptamer has gradually attracted extensive attention for antibiotic detection due to its higher sensitivity, lower cost, false positive/negative avoidance and flexibility in sensor design. Although many of the reported split aptamers are antibiotics aptamers, the acquisition and mechanism of splitting is still unknow. In this review, six reported split aptamers in antibiotics are outlined, including Enrofloxacin, Kanamycin, Tetracycline, Tobramycin, Neomycin, Streptomycin, which have contributed to promote interest, awareness and thoughts into this emerging research field. The study introduced the pros and cons of split aptamers, summarized the assembly principle of split aptamer and discussed the intermolecular binding of antibiotic-aptamer complexes. In addition, the recent application of split aptamers in antibiotic detection are introduced. Split aptamers have a promising future in the design and development of biosensors for antibiotic detection in food and other field. The development of the antibiotic split aptamer meets many challenges including mechanism discovery, stability improvement and new biosensor development. It is believed that split aptamer could be a powerful molecular probe and plays an important role in aptamer biosensor.
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Affiliation(s)
- Hua Ye
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Zhixin Yang
- Department of Food Science & Technology, National University of Singapore, Singapore, Singapore
| | | | - Sobia Niazi
- School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Yuanxin Guo
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Zhouping Wang
- School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Hongshun Yang
- Department of Food Science & Technology, National University of Singapore, Singapore, Singapore
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Wang D, Geng F, Wang Y, Ma Y, Li G, Qu P, Shao C, Xu M. Design of a Fluorescence Turn-on and Label-free Aptasensor Using the Intrinsic Quenching Power of G-Quadruplex to AMT. ANAL SCI 2020; 36:965-970. [PMID: 32062632 DOI: 10.2116/analsci.19p455] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A novel fluorescent aptasensor based on the G-quadruplex induced fluorescent quenching of psoralen and the competitive interactions between 4'-aminomethyl-4,5',8-trimethylpsoralen (AMT), adenosine triphosphate (ATP) and G-rich DNA functionalized split ATP aptamer was proposed. The binding of ATP to the G-rich DNA functionalized split aptamer induced a significant enhancement in fluorescence emission intensity while undergoing excitation at 340 nm. Under the optimal conditions, the developed aptasensor showed high selectivity and good accuracy for detecting ATP. The practicality of the proposed aptasensor has been confirmed by successfully analyzing ATP in spiked human blood serum samples with satisfactory results. As far as we know, this is the first time that the intrinsic quenching ability of G-quadruplex was applied to simply construct a fluorescence turn-on and label-free aptasensor. On account of the superiority of the simplicity of the design strategy, more work is expected in the future to develop a variety of novel sensors for other important analytes using the quenching capability of G-quadruplex through reasonable designs.
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Affiliation(s)
- Dandan Wang
- College of Chemistry and Chemical Engineering, Xinjiang Normal University
| | - Fenghua Geng
- Henan Key Laboratory of Biomolecular Recognition and Sensing, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, School of Chemistry and Chemical Engineering, Shangqiu Normal University
| | - Yongxiang Wang
- Henan Key Laboratory of Biomolecular Recognition and Sensing, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, School of Chemistry and Chemical Engineering, Shangqiu Normal University.,College of Chemistry and Material Science, Huaibei Normal University
| | - Yu Ma
- Henan Key Laboratory of Biomolecular Recognition and Sensing, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, School of Chemistry and Chemical Engineering, Shangqiu Normal University
| | - Guixin Li
- College of Chemistry and Chemical Engineering, Xinjiang Normal University
| | - Peng Qu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, School of Chemistry and Chemical Engineering, Shangqiu Normal University
| | - Congying Shao
- College of Chemistry and Material Science, Huaibei Normal University
| | - Maotian Xu
- Henan Key Laboratory of Biomolecular Recognition and Sensing, Henan Joint International Research Laboratory of Chemo/Biosensing and Early Diagnosis of Major Diseases, School of Chemistry and Chemical Engineering, Shangqiu Normal University
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Li S, Zheng Y, Liu Y, Geng X, Liu X, Zou L, Wang Q, Yang X, Wang K. Investigation of the interaction between split aptamer and vascular endothelial growth factor 165 using single molecule force spectroscopy. J Mol Recognit 2019; 33:e2829. [PMID: 31816660 DOI: 10.1002/jmr.2829] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/17/2019] [Accepted: 11/28/2019] [Indexed: 01/06/2023]
Abstract
Understanding the binding of split aptamer/its target could become a breakthrough in the application of split aptamer. Herein, vascular endothelial growth factor (VEGF), a major biomarker of human diseases, was used as a model, and its interaction with split aptamer was explored with single molecule force spectroscopy (SMFS). SMFS demonstrated that the interaction force of split aptamer/VEGF165 was 169.44 ± 6.59 pN at the loading rate of 35.2 nN/s, and the binding probability of split aptamer/VEGF165 was dependent on the concentration of VEGF165 . On the basis of dynamic force spectroscopy results, one activation barrier in the dissociation process of split aptamer/VEGF165 complexes was revealed, which was similar to that of the intact aptamer/VEGF165 . Besides, the dissociation rate constant (koff ) of split aptamer/VEGF165 was close to that of intact aptamer/VEGF165 , and the interaction force of split aptamer/VEGF165 was higher than the force of intact aptamer/VEGF165 . It indicated that split aptamer also possessed high affinity with VEGF165 . The work can provide a new method for exploring the interaction of split aptamer/its targets at single-molecule level.
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Affiliation(s)
- Shaoyuan Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Yan Zheng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Yaqin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Xiuhua Geng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Xiaofeng Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Liyuan Zou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Qing Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Xiaohai Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, China
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Abstract
The precise detection of extracellular ATP, although a challenging task, is of great significance for understanding the related cell processes. Herein, we developed a ratiometric DNA nanoswitch by employing a DNA tweezer and split aptamer. The nanoswitch is composed of three specially designed ssDNA strands, namely, the central strands O1, O2, and O3. This nanoswitch can be anchored on the cell membrane by cholesterol labeled at the 3' end of O3. Initially, the DNA tweezer adopts an open state, separating the dual fluorophores and giving rise to a low FRET (fluorescence resonance energy transfer) ratio. The presence of ATP induces the binding of the two split aptamers to alter the structure of the nanoswitch from the open state to the closed state, bringing the donor and the acceptor closer together and generating high FRET efficiency. The results demonstrated that the ratiometric DNA nanoswitch can be applied for quantitative analysis and real-time monitoring of the changes in extracellular ATP. We believe that the cell surface-anchored DNA nanoswitch has promising prospects for use as a powerful tool for the understanding of different ATP-related physiological activities.
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Affiliation(s)
- Jing Yuan
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Zhiwei Deng
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Hui Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Xiufang Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Jianbing Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Yao He
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Zhihe Qing
- School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha, 410114, PR China
| | - Yanjing Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
| | - Shian Zhong
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China
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Zhang CH, Wang H, Liu JW, Sheng YY, Chen J, Zhang P, Jiang JH. Amplified Split Aptamer Sensor Delivered Using Block Copolymer Nanoparticles for Small Molecule Imaging in Living Cells. ACS Sens 2018; 3:2526-2531. [PMID: 30468073 DOI: 10.1021/acssensors.8b00670] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We develop a novel amplified split aptamer sensor for highly sensitive detection and imaging of small molecules in living cells by using cationic block copolymer nanoparticles (BCNs) with entrapped fluorescent conjugated polymer as a delivery agent. The design of a split aptamer as the initiator of hybridization chain reaction (HCR) affords the possibility of enhancing the signal-to-background ratio and thus allows high-contrast imaging for small molecules with relatively weak interactions with their aptamers. The novel design of using fluorescent cationic BCNs as the nanocarrier enables efficient and self-tracking transfection of DNA probes. Results reveal that BCNs exhibit high fluorescence brightness allowing direct tracking of the delivery location. The developed amplified split aptamer sensor is shown to have high sensitivity and selectivity for in vitro quantitative detection of adenosine triphosphate (ATP) with a detection limit of 30 nM. Live cell studies show that the sensor provides a "signal on" approach for specific, high-contrast imaging of ATP. The DNA sensor based HCR system may provide a new generally applicable platform for detection and imaging of low-abundance biomarkers.
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Affiliation(s)
- Chong-Hua Zhang
- State Key Laboratory of Chemo-Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
| | - Hong Wang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
| | - Jin-Wen Liu
- State Key Laboratory of Chemo-Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China
| | - Ying-Ying Sheng
- State Key Laboratory of Chemo-Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China
| | - Jian Chen
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
| | - Peisheng Zhang
- State Key Laboratory of Chemo-Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers, Hunan Province College Key Laboratory of QSAR/QSPR, School of Chemistry and Chemical Engineering, Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and Conversion, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
| | - Jian-Hui Jiang
- State Key Laboratory of Chemo-Biosensing & Chemometrics, College of Chemistry & Chemical Engineering, Hunan University, Changsha 410082, China
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Lei Y, Qiao Z, Tang J, He X, Shi H, Ye X, Yan L, He D, Wang K. DNA nanotriangle-scaffolded activatable aptamer probe with ultralow background and robust stability for cancer theranostics. Theranostics 2018; 8:4062-4071. [PMID: 30128036 PMCID: PMC6096399 DOI: 10.7150/thno.24683] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 06/16/2018] [Indexed: 12/23/2022] Open
Abstract
Activatable aptamers have emerged as promising molecular tools for cancer theranostics, but reported monovalent activatable aptamer probes remain problematic due to their unsatisfactory affinity and poor stability. To address this problem, we designed a novel theranostic strategy of DNA nanotriangle-scaffolded multivalent split activatable aptamer probe (NTri-SAAP), which combines advantages of programmable self-assembly, multivalent effect and target-activatable architecture. Methods: NTri-SAAP was assembled by conjugating multiple split activatable aptamer probes (SAAPs) on a planar DNA nanotriangle scaffold (NTri). Leukemia CCRF-CEM cell line was used as the model to investigate its detection, imaging and therapeutic effect both in vitro and in vivo. Binding affinity and stability were evaluated using flow cytometry and nuclease resistance assays. Results: In the free state, NTri-SAAP was stable with quenched signals and loaded doxorubicin, while upon binding to target cells, it underwent a conformation change with fluorescence activation and drug release after internalization. Compared to monovalent SAAP, NTri-SAAP displayed greatly-improved target binding affinity, ultralow nonspecific background and robust stability in harsh conditions, thus affording contrast-enhanced tumor imaging within an extended time window of 8 h. Additionally, NTri-SAAP increased doxorubicin loading capacity by ~5 times, which further realized a high anti-tumor efficacy in vivo with 81.95% inhibition but no obvious body weight loss. Conclusion: These results strongly suggest that the biocompatible NTri-SAAP strategy would provide a promising platform for precise and high-quality theranostics.
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Shen L, Bing T, Liu X, Wang J, Wang L, Zhang N, Shangguan D. Flow Cytometric Bead Sandwich Assay Based on a Split Aptamer. ACS Appl Mater Interfaces 2018; 10:2312-2318. [PMID: 29276885 DOI: 10.1021/acsami.7b16192] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A few aptamers still bind their targets after being split into two moieties. Split aptamers have shown great potential in the development of aptameric sensors. However, only a few split aptamers have been generated because of lack of knowledge on the binding structure of their parent aptamers. Here, we report the design of a new split aptamer and a flow cytometric bead sandwich assay using a split aptamer instead of double antibodies. Through DMS footprinting and mutation assay, we figured out the target-binding moiety and the structure-stabilizing moiety of the l-selectin aptamer, Sgc-3b. By separating the duplex strand in the structure-stabilizing moiety, we obtained a split aptamer that bound l-selectin. After optimization of one part of the split sequence to eliminate the nonspecific binding of the split sequence pair, we developed a split-aptamer-based cytometric bead assay (SACBA) for the detection of soluble l-selectin. SACBA showed good sensitivity and selectivity to l-selectin and was successfully applied for the detection of spiked l-selectin in the human serum. The strategies for generating split aptamers and designing the split-aptamer-based sandwich assay are simple and efficient and show good practicability in aptamer engineering.
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Affiliation(s)
- Luyao Shen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Tao Bing
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Xiangjun Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Junyan Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Linlin Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Nan Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Dihua Shangguan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
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Fiore E, Dausse E, Dubouchaud H, Peyrin E, Ravelet C. Ultrafast capillary electrophoresis isolation of DNA aptamer for the PCR amplification-based small analyte sensing. Front Chem 2015; 3:49. [PMID: 26322305 PMCID: PMC4533002 DOI: 10.3389/fchem.2015.00049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 07/27/2015] [Indexed: 01/14/2023] Open
Abstract
Here, we report a new homogeneous DNA amplification-based aptamer assay for small analyte sensing. The aptamer of adenosine chosen as the model analyte was split into two fragments able to assemble in the presence of target. Primers were introduced at extremities of one fragment in order to generate the amplifiable DNA component. The amount of amplifiable fragment was quantifiable by Real-Time Polymerase Chain Reaction (RT-PCR) amplification and directly reliable on adenosine concentration. This approach combines the very high separation efficiency and the homogeneous format (without immobilization) of capillary electrophoresis (CE) and the sensitivity of real time PCR amplification. An ultrafast isolation of target-bound split aptamer (60 s) was developed by designing a CE input/ouput scheme. Such method was successfully applied to the determination of adenosine with a LOD of 1 μM.
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Affiliation(s)
- Emmanuelle Fiore
- Département de Pharmacochimie Moléculaire UMR 5063, Centre National de la Recherche Scientifique, University Grenoble Alpes Grenoble, France
| | - Eric Dausse
- Laboratoire ARNA, Institut National de la Santé et de la Recherche Médicale U869, Université Bordeaux Bordeaux, France
| | - Hervé Dubouchaud
- Laboratoire de Bioénergétique Fondamentale et Appliquée, Institut National de la Santé et de la Recherche Médicale U1055, University Grenoble Alpes Grenoble, France
| | - Eric Peyrin
- Département de Pharmacochimie Moléculaire UMR 5063, Centre National de la Recherche Scientifique, University Grenoble Alpes Grenoble, France
| | - Corinne Ravelet
- Département de Pharmacochimie Moléculaire UMR 5063, Centre National de la Recherche Scientifique, University Grenoble Alpes Grenoble, France
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Feng L, Zhang Z, Ren J, Qu X. Functionalized graphene as sensitive electrochemical label in target-dependent linkage of split aptasensor for dual detection. Biosens Bioelectron 2014; 62:52-8. [PMID: 24976151 DOI: 10.1016/j.bios.2014.06.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 05/29/2014] [Accepted: 06/03/2014] [Indexed: 11/21/2022]
Abstract
A new type of electrochemical aptasensor was reported here for highly sensitive detection of adenosine triphosphate (ATP) and adenosine deaminase (ADA) activity using functionalized graphene as efficient electrochemical label. The specific binding of ATP and its aptamer could link the split aptamers modified graphene and magnetic beads together. After ADA catalysis and magnetic separation, graphene material anchored on electrode surface would efficiently facilitate electron transfer, thus produce detectable electrochemical signals. The detection limits for ATP and ADA activity were 13.6 nM and 0.01 unit/mL (~1.2 nM), respectively. Our work would supply new horizons for the diagnostic applications of graphene-based materials in biomedicine and biosensors.
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Spiropulos NG, Heemstra JM. Templating effect in DNA proximity ligation enables use of non-bioorthogonal chemistry in biological fluids. Artif DNA PNA XNA 2012; 3:123-8. [PMID: 23370267 DOI: 10.4161/adna.23842] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Here we describe the first example of selective reductive amination in biological fluids using split aptamer proximity ligation (StAPL). Utilizing the cocaine split aptamer, we demonstrate small-molecule-dependent ligation that is dose-dependent over a wide range of target concentrations in buffer, human blood serum and artificial urine medium. We explore the substrate binding preferences of the split aptamer and find that the cinchona alkaloids quinine and quinidine bind to the aptamer with higher affinity than cocaine. This increased affinity leads to improved detection limits for these small-molecule targets. We also demonstrate that linker length and hydrophobicity impact the efficiency of split aptamer ligation. The ability to carry out selective chemical transformations using non-bioorthogonal chemistry in media where competing reactive groups are present highlights the power of the increased effective molarity provided by DNA assembly. Obviating the need for bioorthogonal chemistry would dramatically expand the repertoire of chemical transformations available for use in templated reactions such as proximity ligation assays, in turn enabling the development of novel methods for biomolecule detection.
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Affiliation(s)
- Nicholas G Spiropulos
- Department of Chemistry, Center for Cell and Genome Science, University of Utah, Salt Lake City, UT USA
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