1
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Xu J, Wang S, Yi Z, Wu X, Wang M, Liu Y, Wu Y, Chen D, Lai J, Sun H. Novel biocompatible N-rich AIE fluorescent probe for live cell imaging and visual onsite detection of uranium. Mikrochim Acta 2024; 191:302. [PMID: 38709346 DOI: 10.1007/s00604-024-06390-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 04/26/2024] [Indexed: 05/07/2024]
Abstract
A sensitive and biocompatible N-rich probe for rapid visual uranium detection was constructed by grafting two trianiline groups to 2,6-bis(aminomethyl)pyridine. Possessing excellent aggregation-induced emission (AIE) property and the advantages to form multidentate chelate with U selectively, the probe has been applied successfully to visualize uranium in complex environmental water samples and living cells, demonstrating outstanding anti-interference ability against large equivalent of different ions over a wide effective pH range. A large linear range (1.0 × 10-7-9.0 × 10-7 mol/L) and low detection limit (72.6 nmol/L, 17.28 ppb) were achieved for the visual determination of uranium. The recognition mechanism, photophysical properties, analytical performance and cytotoxicity were systematically investigated, demonstrating high potential for fast risk assessment of uranium pollution in field and in vivo.
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Affiliation(s)
- Jie Xu
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Shenneng Wang
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Zhenni Yi
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Xiaoyi Wu
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Menghao Wang
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yu Liu
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yuexi Wu
- School of Chemistry, South China Normal University, Guangzhou, 510006, China
| | - Diyun Chen
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jiaping Lai
- School of Chemistry, South China Normal University, Guangzhou, 510006, China.
| | - Hui Sun
- College of Environmental Science & Engineering, Guangzhou University, Guangzhou, 510006, China.
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou, 510006, China.
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2
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Deng Y, Jiang S, Yan Z, Chu Y, Wu W, Xiao H. Fluorescent Eu-MOF@nanocellulose-based nanopaper for rapid and sensitive detection of uranium (Ⅵ). Anal Chim Acta 2024; 1292:342211. [PMID: 38309843 DOI: 10.1016/j.aca.2024.342211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/22/2023] [Accepted: 01/02/2024] [Indexed: 02/05/2024]
Abstract
Radioactive uranium leaks into natural water bodies mainly in the form of uranyl ions (UO22+), posing ecological and human health risks. Fluorescent europium-based metal-organic frameworks (Eu-MOFs) have been demonstrated to be effective fluorescent sensors for UO22+, but the large size, powder state and poor dispersity limit their further application. In this work, fluorescent Eu-MOFs were in-situ grown on TEMPO-oxidized cellulose nanofibers (TOCNFs), which is the first time that spherical Eu-MOF crystals with sizes below 10 nm were prepared. Fluorescence spectral analysis revealed a nine-fold increase in the fluorescence intensity of TOCNF@Eu-MOF compared to Eu-MOF. The nanocomposites achieved rapid and sensitive fluorescence quenching to UO22+ through the "antenna effect" and unsaturated Lewis basic sites on the ligands binding with UO22+. Moreover, TOCNF@Eu-MOF demonstrated excellent selectivity and anti-interference for UO22+ detection. For the nanopaper-based sensor made from TOCNF@Eu-MOF, the Stern-Volmer quenching constant (KSV) was calculated as 8.21 × 104 M-1, and the lowest limit of detection (LOD) was 6.6 × 10-7 M, significantly lower than the 1.32 × 10-6 M of Eu-MOFs. In addition, the nanopaper exhibited good fluorescence stability and cyclic detection performance, enabling the rapid and convenient detection of UO22+ in the aqueous phase within 30 s by simple dipping.
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Affiliation(s)
- Yuqing Deng
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, China; School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing, 210094, China
| | - Shan Jiang
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Zifei Yan
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Youlu Chu
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Weibing Wu
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, China.
| | - Huining Xiao
- Department of Chemical Engineering, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada.
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3
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Ye P, Li X, Xie YN, Wu P. Facile monitoring of meat freshness with a self-constructed photosensitization colorimetric instrument. Food Chem 2022; 385:132676. [PMID: 35294903 DOI: 10.1016/j.foodchem.2022.132676] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/08/2022] [Accepted: 03/08/2022] [Indexed: 02/05/2023]
Abstract
Total volatile basic nitrogen (TVB-N) produced from the decomposition of amino acids is an important indicator for meat freshness. Various pH-sensitive colorimetric films have been incorporated as intelligent packaging for meat freshness during food transportation. However, methods and instruments capable of on-site end-point detection of meat freshness are still needed for places that provide raw meat without packaging. Herein, based on amine-induced pH change that led to decreased color output of the 3,3',5,5'-tetramethylbenzidine (TMB)-based photosensitization colorimetric assay, a simple yet convenient instrument employing colorimetric indicator paper (CIP) was constructed for facile monitoring of meat freshness. Owing to the background color provided by the photosensitizer erythrosine (2',4',5',7'-tetraiodofluorescein, TIF), the color changed from blue to pink upon amine adsorption. A bespoke cellphone App was employed for image capture and color analysis of the CIP for freshness monitoring. The analytical results of amine (released from meat during storage) by the proposed method agreed well with those by a standard Conway dish method. In addition, the whole analytical process could be completed in about 5 min. The developed instrument may be potentially useful for on-site monitoring of meat freshness.
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Affiliation(s)
- Peiqi Ye
- Analytical & Testing Center, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
| | - Xianming Li
- Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Ya-Ni Xie
- Analytical & Testing Center, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
| | - Peng Wu
- Analytical & Testing Center, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China.
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4
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Bai Y, Xu L, Chai H, Zhou L, Jiang G, Zhang G. Recent Advances on DNAzyme-Based Biosensors for Detection of Uranyl. Front Chem 2022; 10:882250. [PMID: 35572119 PMCID: PMC9091443 DOI: 10.3389/fchem.2022.882250] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 03/22/2022] [Indexed: 11/13/2022] Open
Abstract
Nuclear facilities are widely used in fields such as national defense, industry, scientific research, and medicine, which play a huge role in military and civilian use. However, in the process of widespread application of nuclear technology, uranium and its compounds with high carcinogenic and biologically toxic cause a lot of environmental problems, such as pollutions of water, atmosphere, soil, or ecosystem. Bioensors with sensitivity and specificity for the detection of uranium are highly demand. Nucleic acid enzymes (DNAzyme) with merits of high sensitivity and selectivity for targets as excellent molecular recognition elements are commonly used for uranium sensor development. In this perspective review, we summarize DNAzyme-based biosensors for the quantitative detection of uranyl ions by integrating with diverse signal outputting strategies, such as fluorescent, colorimetry, surface-enhanced Raman scattering, and electrochemistry. Different design methods, limit of detection, and practical applications are fully discussed. Finally, the challenges, potential solutions, and future prospects of such DNAzyme-based sensors are also presented.
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Affiliation(s)
- Yunlong Bai
- Beijing Research Institute of Chemical Engineering and Metallurgy, China National Nuclear Corporation, Beijing, China
| | - Lechang Xu
- Beijing Research Institute of Chemical Engineering and Metallurgy, China National Nuclear Corporation, Beijing, China
- *Correspondence: Lechang Xu, ; Guangyao Zhang,
| | - Huining Chai
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
| | - Lei Zhou
- Beijing Research Institute of Chemical Engineering and Metallurgy, China National Nuclear Corporation, Beijing, China
| | - Guoping Jiang
- Beijing Research Institute of Chemical Engineering and Metallurgy, China National Nuclear Corporation, Beijing, China
| | - Guangyao Zhang
- Intelligent Wearable Engineering Research Center of Qingdao, Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao, China
- *Correspondence: Lechang Xu, ; Guangyao Zhang,
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5
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Sun L, Liu J, Li L, Zhen D, Dai Z, Tang S, Zhu B, Chen L, Chen H, Gong M, Tang Z, Hu Y. Advances of biosensors for UO22+ detecting based on specific DNAzyme. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Recent advances in the construction of functional nucleic acids with isothermal amplification for heavy metal ions sensor. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Salem AR, El-Naggar AM, Mohamed EH, Amin MA, Attia MS. A novel cyanopyridine derived fluorescent sensor for selective determination of uranyl ions in different water samples. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-08105-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Zheng ZJ, Zhang L, Wang LZ, Zhong ZQ, Xiong YT, Guo J, Zhang ZB, Cao XH, Xiao SJ. Ultrasensitive detection of UO 2 2+ based on dopamine-functionalized MoO x quantum dots. LUMINESCENCE 2021; 37:127-133. [PMID: 34730276 DOI: 10.1002/bio.4153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/17/2021] [Accepted: 10/25/2021] [Indexed: 11/11/2022]
Abstract
Uranium is an important nuclear fuel and the risk of human exposure to uranium increases as increasing amounts of uranium-containing waste enter the environment due to the rapid growth of nuclear power. Therefore, rapid, sensitive, and portable uranium detection is a promising approach to effectively control and monitor uranium contamination. To achieve this goal, abundant oxygen- and nitrogen-containing groups were introduced to molybdenum oxide quantum dot (MoOx QDs) surfaces with dopamine (DA) modification. Due to the excellent coordination ability of oxygen- and nitrogen-containing groups with uranium, the obtained DA-functionalized MoOx QDs (DA-MoOx QDs) showed a strong binding affinity for uranium and sensitivity was increased nearly 1000-fold compared with MoOx QDs alone. The limit of detection was 3.85 nM, which is higher than most of the reported nanomaterials. Moreover, the DA-MoOx QD-based method showed high selectivity and uranium could be clearly detected under masking with ethylenediaminetetraacetic acid even when the concentration of other metal ions was 100-fold higher than that of uranium, showing a very promising method for uranium contamination control and monitoring.
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Affiliation(s)
- Zhi Jian Zheng
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology (ECUT), Nanchang, China.,School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
| | - Li Zhang
- College of Chemistry, Nanchang University, China
| | - Li Zhi Wang
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology (ECUT), Nanchang, China.,School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
| | - Zu Qi Zhong
- School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
| | - Yu Tian Xiong
- School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
| | - Jing Guo
- School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
| | - Zhi Bin Zhang
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology (ECUT), Nanchang, China.,School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
| | - Xiao Hong Cao
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology (ECUT), Nanchang, China.,School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
| | - Sai Jin Xiao
- Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology (ECUT), Nanchang, China.,School of Chemistry, Biology and Material Science, ECUT, Nanchang, China
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9
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Kumar R S, Venkatesan V, Bhaskar R, Kumar SKA, Sivaramakrishna A, Vijayakrishna K, Brahmmananda Rao CVS, Sivaraman N, Sahoo SK. Rapid detection strategies for the ultra-level chemosensing of uranyl ions. Dalton Trans 2021; 50:14706-14713. [PMID: 34585704 DOI: 10.1039/d1dt01803e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A simple and reliable colorimetric probe N,N'-bis-(4-diethylamino-2-hydroxybenzylidene)-1,10-phenanthroline-2,9-carbohydrazide (L) has been synthesised by reacting 4-(diethylamino)salicylaldehyde with 1,10-phenanthroline-2,9-dicarbohydrazide. The sensing ability of L was studied by its interactions with various f-block metal ions and other selected metal ions from s- and d-block by colorimetry, UV-visible spectrophotometry, and smartphone integrated red-green-blue (RGB) model in DMSO : H2O (7 : 3, v/v). The pale-yellow colour of L turns to wine-red upon interaction with uranyl ions (UO22+) and yellow-orange in the presence of Th4+, Zr4+, Fe3+, and Lu3+ ions. Other tested metal ions did not show any colour change of L. This color change offered a simple, quick, and consistent method for the selective and sensitive visual detection of trace levels of UO22+ ions without any need for sophisticated instruments. Sensor L exhibits two absorption bands at 358 and 389 nm due to ligand-to-ligand charge transfer (LLCT). Upon interaction of L with UO22+ and Th4+ ions, absorption bands are exhibited at 480 nm and 422 nm, respectively, due to ligand-to-metal charge transfer (LMCT). The UV-vis spectral studies indicated the formation of a 1 : 2 ligand-to-metal complex between L and UO22+ with an estimated association constant of 1.0 × 104 M-2. Using L, the concentration of UO22+ can be detected as low as 73 nM and 150 nM by spectrophotometry and RGB methods, respectively, without any interference from other tested ions with an RSD < 5% (n = 3). The binding mechanism was studied by 1H NMR titration, ESI mass, and FT-IR spectral analysis and was well supported by theoretical results. Overall, sensor L demonstrates promising analytical applicability for the detection of UO22+ ions in a semi-aqueous medium.
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Affiliation(s)
- Selva Kumar R
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India. .,Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, (SIMATS), Chennai - 602105, Tamil Nadu, India
| | - Vetriarasu Venkatesan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - R Bhaskar
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - S K Ashok Kumar
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - Akella Sivaramakrishna
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore-632014, Tamil Nadu, India.
| | - Kari Vijayakrishna
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneshwar, Odisha 752050, India
| | | | - N Sivaraman
- Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam-603102, Tamil Nadu, India
| | - Suban K Sahoo
- Department of Applied Chemistry, S. V. National Institute Technology, Surat-395007, Gujarat, India
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10
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Xu Q, Liu K, Jin J, Zhang X. Binding-induced output of catalyst DNA for efficient payload of DNAzyme on magnetic beads by catalyzed hairpin assembly. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Abstract
This article provides a comprehensive review of biosensing with DNAzymes, providing an overview of different sensing applications while highlighting major progress and seminal contributions to the field of portable biosensor devices and point-of-care diagnostics. Specifically, the field of functional nucleic acids is introduced, with a specific focus on DNAzymes. The incorporation of DNAzymes into bioassays is then described, followed by a detailed overview of recent advances in the development of in vivo sensing platforms and portable sensors incorporating DNAzymes for molecular recognition. Finally, a critical perspective on the field, and a summary of where DNAzyme-based devices may make the biggest impact are provided.
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Affiliation(s)
- Erin M McConnell
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario L8S 4K1, Canada.
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12
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Yuan Y, Liu T, Xiao J, Yu Q, Feng L, Niu B, Feng S, Zhang J, Wang N. DNA nano-pocket for ultra-selective uranyl extraction from seawater. Nat Commun 2020; 11:5708. [PMID: 33177515 PMCID: PMC7659010 DOI: 10.1038/s41467-020-19419-z] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 10/07/2020] [Indexed: 12/18/2022] Open
Abstract
Extraction of uranium from seawater is critical for the sustainable development of nuclear energy. However, the currently available uranium adsorbents are hampered by co-existing metal ion interference. DNAzymes exhibit high selectivity to specific metal ions, yet there is no DNA-based adsorbent for extraction of soluble minerals from seawater. Herein, the uranyl-binding DNA strand from the DNAzyme is polymerized into DNA-based uranium extraction hydrogel (DNA-UEH) that exhibits a high uranium adsorption capacity of 6.06 mg g−1 with 18.95 times high selectivity for uranium against vanadium in natural seawater. The uranium is found to be bound by oxygen atoms from the phosphate groups and the carbonyl groups, which formed the specific nano-pocket that empowers DNA-UEH with high selectivity and high binding affinity. This study both provides an adsorbent for uranium extraction from seawater and broadens the application of DNA for being used in recovery of high-value soluble minerals from seawater. The extraction of metals from seawater is an area of great potential; especially for the extraction of uranium. Here, the authors report on the synthesis of a DNA based uranium adsorbent with high selectivity and demonstrate the potential for the DNA based extraction of high-value soluble minerals from seawater.
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Affiliation(s)
- Yihui Yuan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Tingting Liu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Juanxiu Xiao
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Qiuhan Yu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Lijuan Feng
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Biye Niu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Shiwei Feng
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Jiacheng Zhang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China
| | - Ning Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, 570228, Haikou, P. R. China.
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13
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Zhang C, Zhang H, Wu P, Zhang X, Liu J. Suppressing the background activity of hemin for boosting the sensitivity of DNAzyme-based biosensors by SYBR Green I. Biosens Bioelectron 2020; 169:112603. [PMID: 32947082 DOI: 10.1016/j.bios.2020.112603] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/04/2020] [Accepted: 09/06/2020] [Indexed: 02/08/2023]
Abstract
Peroxidase-like DNAzymes have been extensively used to replace horseradish peroxidase (HRP) for developing biosensors for signal amplification. However, the background activity from the cofactor (i.e., free hemin) has limited the sensitivity of such sensors. Herein, we aim to find an inhibitor for hemin to suppress the background signal, and a classic split DNAzyme-based sensor was used to detect a complementary DNA oligonucleotide. After screening a series of dyes, SYBR Green I (SG, one of the DNA stanning dyes) was selected for suppressing the background. Simply by adding 0.84 μM SG, the background from 50 nM hemin was suppressed over 30-fold. The suppression was caused by the interaction between SG and hemin. In the presence of the target DNA, the formed duplex region and G-quadruplex structure can better bind SG and hemin respectively, thus preventing the interaction between them and showing a high activity of the DNAzyme. The optimized sensor showed a detection limit of 3.8 pM for the target DNA (p53 gene). In addition, the backgrounds from chemiluminescence, colorimetric and fluorescence sensing modes can all be reduced by adding SG to the split DNAzyme system. The suppression of the background of peroxidase DNAzymes is a critical step towards practical use of related biosensors.
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Affiliation(s)
- Chi Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Houchun Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Peng Wu
- Key Laboratory of Green Chemistry and Technology, Analytical & Testing Center, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, China
| | - Xinfeng Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China; Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Ontario N2L 3G1, Canada.
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Ontario N2L 3G1, Canada.
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14
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Tang G, Liu W, Chen Z, Huang PJJ, Qin X, Xu S. Graphene oxide as a cartridge enable on-line assembly of photosensitizer for 1O 2-based electrochemical aptasensing. Mikrochim Acta 2020; 187:477. [PMID: 32740677 DOI: 10.1007/s00604-020-04392-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 06/15/2020] [Indexed: 11/25/2022]
Abstract
An ultrasensitive 1O2-based electrochemical aptasensor by on-line assembly of photosensitizers using graphene oxide (GO) as a cartridge is reported. In the presence of target protein lysozyme, the interaction of lysozyme with aptamer led to the dissociation of dsDNA and release of the aptamer-lysozyme complex to solution, with DNA-c retaining on the electrode; then, the photosensitizer phloxine B (PB) was assembled on the electrode since GO can simultaneously adsorb DNA-c and PB molecules. Upon irradiation by a green LED, 1O2 was generated by photocatalysis of PB molecules and then cleaved the DNA-c, leading to remarkably decreased impedance signals that linearly respond with the logarithm of lysozyme concentration. Benefitting from the efficient photosensitization ability of PB and the high PB-loading capacity of GO, the developed sensor allowed determination of 0.001 to 100 nM lysozyme with a limit of detection of about 0.14 pM. The relative standard deviation (RSD) for five independent electrodes with 1 nM lysozyme was 3.1%, indicating satisfactory reproducibility. The sensor also showed excellent selectivity toward lysozyme in the presence of interfering substances and was applied to the determination of lysozyme in urine samples with recoveries ranging from 91 to 101%. The on-line assembly of photosensitizer technique opens a new way for amplified electrosensing of biomolecules. Graphical abstract An on-line assembly of photosensitizers and DNA on electrode was developed using graphene oxide a cartridge and the photocatalytic electrosensor can be used for label-free detection of lysozyme as low as 1 pM.
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Affiliation(s)
- Gangxu Tang
- College of Material and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Wei Liu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China
| | - Zhaoxia Chen
- College of Material and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Po-Jung Jimmy Huang
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Xiaojiao Qin
- College of Material and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Shuxia Xu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, China.
- Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
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15
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Gao L, Tong X, Ye T, Gao H, Zhang Q, Yan C, Yu Y, Fei Y, Zhou X, Shao Y. G‐Quadruplex‐Based Photooxidase Driven by Visible Light. ChemCatChem 2019. [DOI: 10.1002/cctc.201901481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Longlong Gao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Xingyu Tong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Ting Ye
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Heng Gao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Qingqing Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Chenxiao Yan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Yali Yu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Yifan Fei
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Xiaoshun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
| | - Yong Shao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry College of Chemistry and Life SciencesZhejiang Normal University Jinhua 321004 P.R. China
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17
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Ding Y, Li X, Zhang X, Li F, Hou X, Wu P. Systematic Probing of the Sequence Selectivity of Exonuclease III with a Photosensitization Colorimetric Assay. ACS OMEGA 2019; 4:13382-13387. [PMID: 31460466 PMCID: PMC6705212 DOI: 10.1021/acsomega.9b01560] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 07/24/2019] [Indexed: 06/10/2023]
Abstract
Exonuclease III (Exo III) is an important enzymatic tool that is being widely used in molecular biology, biotechnology, and bioassay development. Exo III prefers to cleave double-stranded DNA (dsDNA) with blunt and recessed 3'-termini rather than their protruding counterpart. While it has been accepted that a short 3'-overhang (e.g., >4 nt) is necessary to protect a dsDNA from Exo III cleavage, critical roles of the length and sequence of this 3'-overhang remain unexplored. Herein, we develop a novel light-induced colorimetric assay allowing the systematic probe of the sequence selectivity of Exo III in a rapid and high-throughput manner. Our finding that Exo III is highly specific to 3'-overhang in terms of both length and sequence will be valuable for guiding the design of bioassays and DNA manipulating tools mediated by Exo III.
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Affiliation(s)
- Yu Ding
- Analytical
& Testing Center, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xianming Li
- Analytical
& Testing Center, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xinfeng Zhang
- College
of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Feng Li
- Analytical
& Testing Center, College of Chemistry, Sichuan University, Chengdu 610064, China
- Department
of Chemistry, Center for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Xiandeng Hou
- Analytical
& Testing Center, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Peng Wu
- Analytical
& Testing Center, College of Chemistry, Sichuan University, Chengdu 610064, China
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18
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Cowie BE, Purkis JM, Austin J, Love JB, Arnold PL. Thermal and Photochemical Reduction and Functionalization Chemistry of the Uranyl Dication, [UVIO2]2+. Chem Rev 2019; 119:10595-10637. [DOI: 10.1021/acs.chemrev.9b00048] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Bradley E. Cowie
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Jamie M. Purkis
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Jonathan Austin
- National Nuclear Laboratory, Chadwick House,
Warrington Road, Birchwood Park, Warrington WA3 6AE, U.K
| | - Jason B. Love
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
| | - Polly L. Arnold
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, The King’s Buildings, Edinburgh EH9 3FJ, U.K
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19
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Li S, Li G, Du Z, Zhu L, Tian J, Luo Y, Huang K, Xu W. The ultra-sensitive visual biosensor based on thermostatic triple step functional nucleic acid cascade amplification for detecting Zn2+. Food Chem 2019; 290:95-100. [DOI: 10.1016/j.foodchem.2019.03.134] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 12/29/2022]
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20
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Lin X, Xiao F, Li X, Li F, Liu C, Xiao X, Hu N, Yang S. A cytosine-rich hairpin DNA loaded with silver nanoclusters as a fluorescent probe for uranium(IV) and mercury(II) ions. Mikrochim Acta 2019; 186:519. [PMID: 31289935 DOI: 10.1007/s00604-019-3625-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 06/17/2019] [Indexed: 12/28/2022]
Abstract
A dually responsive fluorescent probe for determination of U(IV) and mercury(II) ions was synthesized. The probe consists of a cytosine-rich hairpin DNA loaded with silver nanoclusters (DNA-AgNCs). The fluorescence of the AgNCs is found to be quenched by UO2(II) at pH 5.0 and Hg(II) at pH 7.0 due to combined static and dynamic quenching. Under the optimal conditions, the green fluorescence of the DNA-AgNCs, best measured at excitation/emission wavelengths of 420/525 nm, decreases in the 4.0 to 75 pM UO2(II) concentration range, and in the 0.3 to 8.0 nM Hg(II) concentration range. The respective detection limits are as low as 1.8 pM and 0.1 nM. The method was successfully applied to the determination of UO2(II) and Hg(II) in (spiked) pond and taps waters and in soil extracts. Graphical abstract A label-free DNA was designed to synthesize green-fluorescent silver nanoclusters (AgNCs) and used for rapid dual detection of uranyl ions (UO2(II)) at pH 5.0 and of mercury ions (Hg(II)) at pH 7.0 in environmental samples.
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Affiliation(s)
- Xi Lin
- College of Public Health, University of South China, Hengyang, 421001, People's Republic of China
| | - Fubing Xiao
- College of Public Health, University of South China, Hengyang, 421001, People's Republic of China
| | - Xuejiao Li
- College of Public Health, University of South China, Hengyang, 421001, People's Republic of China
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital of Sun Yat-sen University, 600 Tianhe Road, Guangzhou, 510630, China
| | - Feifei Li
- College of Public Health, University of South China, Hengyang, 421001, People's Republic of China
| | - Can Liu
- College of Public Health, University of South China, Hengyang, 421001, People's Republic of China
| | - Xilin Xiao
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
| | - Nan Hu
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, 421001, China
| | - Shengyuan Yang
- College of Public Health, University of South China, Hengyang, 421001, People's Republic of China.
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21
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Farzin L, Shamsipur M, Sheibani S, Samandari L, Hatami Z. A review on nanomaterial-based electrochemical, optical, photoacoustic and magnetoelastic methods for determination of uranyl cation. Mikrochim Acta 2019; 186:289. [PMID: 30997559 DOI: 10.1007/s00604-019-3426-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 04/08/2019] [Indexed: 02/07/2023]
Abstract
This review (with 177 refs) gives an overview on nanomaterial-based methods for the determination of uranyl ion (UO22+) by different types of transducers. Following an introduction into the field, a first large section covers the fundamentals of selective recognition of uranyl ion by receptors such as antibodies, aptamers, DNAzymes, peptides, microorganisms, organic ionophores (such as salophens, catechols, phenanthrolines, annulenes, benzo-substituted macrocyclic diamides, organophosphorus receptors, calixarenes, crown ethers, cryptands and β-diketones), by ion imprinted polymers, and by functionalized nanomaterials. A second large section covers the various kinds of nanomaterials (NMs) used, specifically on NMs for electrochemical signal amplification, on NMs acting as signal tags or carriers for signal tags, on fluorescent NMs, on NMs for colorimetric assays, on light scattering NMs, on NMs for surface enhanced Raman scattering (SERS)-based assays and wireless magnetoelastic detection systems. We then discuss detection strategies, with subsections on electrochemical methods (including ion-selective and potentiometric systems, voltammetric systems and impedimetric systems). Further sections treat colorimetric, fluorometric, resonance light scattering-based, SERS-based and photoacoustic methods, and wireless magnetoelastic detection. The current state of the art is summarized, and current challenges are discussed at the end. Graphical abstract An overview is given on nanomaterial-based methods for the detection of uranyl ion by different types of transducers (such as electrochemical, optical, photoacoustic, magnetoelastic, etc) along with a critical discussion of their limitations, benefits and application to real samples.
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Affiliation(s)
- Leila Farzin
- Radiation Application Research School, Nuclear Science and Technology Research Institute, P.O. Box 11365-3486, Tehran, Iran.
| | - Mojtaba Shamsipur
- Department of Chemistry, Razi University, P. O. Box, Kermanshah, 67149-67346, Iran.
| | - Shahab Sheibani
- Radiation Application Research School, Nuclear Science and Technology Research Institute, P.O. Box 11365-3486, Tehran, Iran
| | - Leila Samandari
- Department of Chemistry, Razi University, P. O. Box, Kermanshah, 67149-67346, Iran
| | - Zahra Hatami
- Department of Chemistry, Razi University, P. O. Box, Kermanshah, 67149-67346, Iran
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22
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He W, Hua D. Spectrographic sensors for uranyl detection in the environment. Talanta 2019; 201:317-329. [PMID: 31122429 DOI: 10.1016/j.talanta.2019.04.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 04/04/2019] [Accepted: 04/07/2019] [Indexed: 02/06/2023]
Abstract
More and more severe energy problem triggers extensive application of nuclear energy, and the adverse effects brought by nuclear materials such as uranyl to the environment are becoming the concern, as it has become a threat to human's health. Therefore, the detection of uranyl is increasingly important, which aims to make the application of uranium under surveillance and protection. A lot of detection methods employing varying materials based on different techniques for uranyl have been proposed including those using expensive and complicated instruments such as ICP-MS, ESI-MS, and neutron activation analysis etc. Those methods based on expensive instruments often provide quite low limit of detection (LOD) and excellent validity and repeatability, however, methods that are low-cost, convenient and rapid are in demand because these are satisfied characters for on-site and in-time determination. In the review, we discuss uranyl sensors based on spectrographic techniques, which is facile and promising for rapid assessment of uranium content in practical application. Spectrographic techniques including fluorescence, UV-vis spectrophotometry, resonance light scattering (RLS) and surface enhanced Raman scattering (SERS) are evaluated. In detail, the core materials that playing extremely important roles in detection performance are stated consisting of small molecule, biomolecule, polymer and nanomaterial.
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Affiliation(s)
- Weiwei He
- State Key Laboratory of Radiation Medicine and Protection, School of Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, 215123, China; Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China
| | - Daoben Hua
- State Key Laboratory of Radiation Medicine and Protection, School of Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, 215123, China; Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, 215123, China.
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23
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Wang Y, Dong Z, Hu H, Yang Q, Hou X, Wu P. DNA-modulated photosensitization: current status and future aspects in biosensing and environmental monitoring. Anal Bioanal Chem 2019; 411:4415-4423. [PMID: 30734855 DOI: 10.1007/s00216-019-01605-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 12/22/2018] [Accepted: 01/11/2019] [Indexed: 01/22/2023]
Abstract
Recently, photosensitized oxidation has been explored in many fields of research and applications, such as photodynamic therapy (PDT) and photodynamic antimicrobial chemotherapy (PACT). Although the photosensitized generation of ROS features emerging applications, controllable management of the photosensitization process is still sometimes problematic. DNA has long been considered the carrier for genetic information. With the in-depth study of the chemical properties of DNA, the molecular function of DNA is gradually witnessed by the scientific community. Undoubtedly, the selective recognition nature of DNA endows them excellent candidate modulators for photosensitized oxidation. According to current research, reports on DNA regulation of photosensitized oxidation can be roughly divided into two categories in principle: P-Q quenching pair-switched photosensitization and host-guest interaction-switched photosensitization. In this review, the development status of these two analytical methods will be summarized, and the future development direction of DNA-modulated photosensitization in biosensing and environmental monitoring will also be prospected.
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Affiliation(s)
- Yanying Wang
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Zhen Dong
- College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Hao Hu
- Analytical & Testing Center, Sichuan University, Chengdu, 610064, China
| | - Qing Yang
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China.
| | - Xiandeng Hou
- College of Chemistry, Sichuan University, Chengdu, 610064, China.,Analytical & Testing Center, Sichuan University, Chengdu, 610064, China
| | - Peng Wu
- College of Chemistry, Sichuan University, Chengdu, 610064, China. .,Analytical & Testing Center, Sichuan University, Chengdu, 610064, China. .,State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610064, China.
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24
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A facile electrochemical aptasensor for lysozyme detection based on target-induced turn-off of photosensitization. Biosens Bioelectron 2018; 126:412-417. [PMID: 30471566 DOI: 10.1016/j.bios.2018.09.074] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 09/09/2018] [Accepted: 09/20/2018] [Indexed: 12/28/2022]
Abstract
The quantification of proteins is essential in fundamental research or clinical applications. Here, we developed a facile electrochemical aptasensor based on target-induced turn-off of photosensitization for label-free and ultrasensitive detection of protein (exemplified by lysozyme). EB (ethidium bromide) molecules that were embedded in dsDNA between lysozyme binding aptamer and complementary DNA immobilized on the electrode, could photo-cleave the dsDNA via singlet oxygen (O21) during photosensitization, resulting in a high voltammetry current of the [Fe(CN)6]3-/4-. Upon recognition of the lysozyme by aptamer, the EB molecules were released from dsDNA, and its photosensitization activity was turned off. As a result, more amount of complementary DNA was retained on the Au nanoparticles modified carbon nanotube paste electrode (AuNPs-CNPE), leading to a declined voltammetry current. Such a sensing strategy allowed detection of 10 pM-1 µM lysozyme with a low detection limit (about 2 pM). Besides, the sensor was free of labeling procedure as well as extra signal amplification step, and the CNPE modification was quite simple, only with AuNPs. The sensor also showed excellent selectivity toward lysozyme in the presence of interfering proteins, such as thrombin, bovine serum albumin, myoglobin, etc. The proposed sensor was applied to the determination of lysozyme in urine samples with the recoveries ranging from 96.6% to 101%. The proposed biosensor holds a great promise in developing other electrochemical sensors based on photosensitization.
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25
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Wang K, Feng M, He MQ, Zhai FH, Dai Y, He RH, Yu YL. DNA-fueled target recycling-induced two-leg DNA walker for amplified electrochemical detection of nucleic acid. Talanta 2018; 188:685-690. [PMID: 30029432 DOI: 10.1016/j.talanta.2018.06.049] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/11/2018] [Accepted: 06/13/2018] [Indexed: 12/13/2022]
Abstract
Taking advantage of the homogeneous and heterogeneous electrochemical biosensors, a simple, sensitive, and selective electrochemical biosensor is constructed by combining entropy-driven amplification (EDA) with DNA walker. This electrochemical biosensor realizes the biorecognition and EDA operation in homogeneous solution, which is beneficial to improve the recognition and amplification efficiency. A two-leg DNA walker generated by EDA can walk on the surface of gold electrode for cleaving the immobilized substrate DNA and releasing the electroactive labels, giving rise to a significant decrease of the electrochemical signal. The immobilization of the electroactive labels ensures the reproducibility and reliability of the biosensor. The present cascade amplification assay can be applied to detect target DNA with a detection limit of 0.29 fM, and base mutations can be easily distinguished. Moreover, the proposed electrochemical biosensor shows a satisfactory performance for the detection of target DNA in human serum. Thus, the novel electrochemical biosensor holds promising potential for a future application in disease diagnosis.
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Affiliation(s)
- Kun Wang
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Min Feng
- The first Affiliated Hospital of Dalian Medical University, Dalian 116011, China
| | - Meng-Qi He
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Fu-Heng Zhai
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Yu Dai
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Rong-Huan He
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China.
| | - Yong-Liang Yu
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China.
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