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Zhao S, Yang J, Wang L, Dong B, Mao Y, Qu H, Zheng L. Selective detection of Pb 2+ ions based on a graphene field-effect transistor gated by DNAzymes in binding mode. Biosens Bioelectron 2023; 237:115549. [PMID: 37523810 DOI: 10.1016/j.bios.2023.115549] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 07/13/2023] [Accepted: 07/25/2023] [Indexed: 08/02/2023]
Abstract
Heavy metal contamination has become a severe threat to dairy products through contaminated feed and the environment water. Among them, Pb(II) is highly toxic to the human body even under minimal exposure. Therefore, establishing a fast and sensitive Pb2+ detection technology is significant for rapid screening of vast number of dairy products. Hererin, we report the development of a sensitive and selective Pb(II) biosensor based on a solution-gated graphene transistor (SGGT) with the gate modified by Pb2+-dependent DNAzyme probes. It has also been explored that the DNAzymes working in simple binding mode integrate better with the SGGT than those working in normal catalytic mode, showing significantly stronger channel current responses and lower detection limit down to 0.39 μg/L (or 1.9 nM). Finally, the biosensor was practicably applied to the detection of lead ions in pure milk samples with a high recovery rate. We believe that this work reveals the best strategy for integrating metal ion dependent DNAzyme probes with SGGT sensing platforms to selectively and sensitively detect many metal ions.
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Affiliation(s)
- Siyu Zhao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Jing Yang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Lu Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China; Intelligent Manufacturing Institute of HFUT, Hefei, 230009, China
| | - Baolei Dong
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Yu Mao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Hao Qu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China; Engineering Research Center of Bioprocess, Ministry of Education, Hefei University of Technology, Hefei, 230009, China.
| | - Lei Zheng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, China; Intelligent Interconnected Systems Laboratory of Anhui Province, Hefei University of Technology, Hefei, 230009, China
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2
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HASAN E, ALI S, ZİA A, BEGUM S, KHAN ST, BUKHARİ S. Synthesis of Imino Stabilized Iron Oxide Nanosensor for Selective Detection of Lead Ions. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2023. [DOI: 10.18596/jotcsa.1097197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
Abstract
The present work describes the successful preparation of iron oxide nanoparticles (NSB1) stabilized with 4-((2-hydroxybenzylidene)amino)benzoic acid. The characterization has been achieved through ultraviolet visible (UV-Vis), fourier transform infra-red (FTIR) spectroscopy and scanning electron microscopy (SEM) with electron dispersive X-ray elemental analysis (EDX). These magnetic nanoparticles have exhibited significant chemosensing properties in the aqueous media to screen Cr3+, Cd2+, Li+, Co2+, Al3+, Pb2+, Ni2+ and Sr2+ ions. However, lead (Pb2+) ions have shown the highest selectivity as compared to other metal ions without any interference in the competitive ion study. The detection limit of Pb2+ ions was found to be 1.7 µM by this nanosensor. The binding ratio and stoichiometry was found to be 1:1 as measured by Job’s plot. The binding strength was also computed through Benesei-Hildebrand equation.
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3
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Du X, Wang R, Zhai J, Xie X. Surface PEGylation of ionophore-based microspheres enables determination of serum sodium and potassium ion concentration under flow cytometry. Anal Bioanal Chem 2022:10.1007/s00216-022-04301-2. [PMID: 36045175 DOI: 10.1007/s00216-022-04301-2] [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: 07/09/2022] [Revised: 08/08/2022] [Accepted: 08/19/2022] [Indexed: 11/01/2022]
Abstract
We present here an ionophore-based ion-selective optode (ISO) platform to detect potassium and sodium concentrations in serum through flow cytometry. The ion-selective microsensors were based on polyethylene glycol (PEG)-modified polystyrene (PS) microspheres (PEG-PS). Ratiometric response curves were observed using peak channel fluorescence intensities for K+ (10-6 M to 0.1 M) and Na+ (10-4 M to 0.2 M) with sufficient selectivity for clinical diagnosis. Due to the matrix effect, proteins such as albumin and immunoglobulin caused an obvious increase in response for serum sample determination. To solve this problem, 4-arm PEG chains were covalently attached onto the surface of PS microspheres through a two-step reaction, which improved the stability and combated pollution of microspheres. As a preliminary application, potassium and sodium concentrations in human serums were successfully determined by the PEG-PS microsensors through flow cytometry.
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Affiliation(s)
- Xinfeng Du
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Renjie Wang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Jingying Zhai
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Xiaojiang Xie
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China. .,Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
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4
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Velusamy K, Periyasamy S, Kumar PS, Rangasamy G, Nisha Pauline JM, Ramaraju P, Mohanasundaram S, Nguyen Vo DV. Biosensor for heavy metals detection in wastewater: A review. Food Chem Toxicol 2022; 168:113307. [PMID: 35917955 DOI: 10.1016/j.fct.2022.113307] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 07/01/2022] [Accepted: 07/13/2022] [Indexed: 10/16/2022]
Abstract
Pollution due to heavy metals is a global issue in recent years. Initially, there were fewer contaminants, which has increased exponentially owing to rapid industrialization and various anthropogenic activities. Toxicity due to heavy metals causes a lot of health problems and organ system failure in human beings. It also affects other forms of living beings such as plants, animals and even the microbiota. This has been reported by various press reports and research findings. In this review, the production of heavy metals, associated effects on the environment and the technologies employed for detecting these heavy metals are comprehensively discussed. The analytical instruments, including biosensors, have been found to be more beneficial than other techniques. Biosensor exhibits numerous special features, such as reproducibility, reusability, linearity, sensitivity, selectivity, and stability. Over the last three years, biosensors have also had a detection limit of 65.36 ng/mL for heavy metals. The design of biosensors, features and types were also explained in detail. The limit of detection for the heavy metals in wastewater using biosensors was also included with recent references up to the last five years.
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Affiliation(s)
- Karthik Velusamy
- Department of Industrial Biotechnology, Government College of Technology, Coimbatore, 641013, India
| | - Selvakumar Periyasamy
- Department of Chemical Engineering, School of Mechanical, Chemical and Materials Engineering, Adama Science and Technology University, Adama, 1888, Ethiopia
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603 110, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603 110, India.
| | - Gayathri Rangasamy
- Department of Sustainable Engineering, Institute of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai, 602105, India
| | - J Mercy Nisha Pauline
- Department of Industrial Biotechnology, Government College of Technology, Coimbatore, 641013, India
| | - Pradeep Ramaraju
- Department of Industrial Biotechnology, Government College of Technology, Coimbatore, 641013, India
| | - Sneka Mohanasundaram
- Department of Industrial Biotechnology, Government College of Technology, Coimbatore, 641013, India
| | - Dai-Viet Nguyen Vo
- Institute of Environmental Sciences, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam.
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5
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Safdar S, Ven K, van Lent J, Pavie B, Rutten I, Dillen A, Munck S, Lammertyn J, Spasic D. DNA-only, microwell-based bioassay for multiplex nucleic acid detection with single base-pair resolution using MNAzymes. Biosens Bioelectron 2020; 152:112017. [PMID: 31941617 DOI: 10.1016/j.bios.2020.112017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 12/17/2022]
Abstract
In disease diagnostics, single- and multiplex nucleic acid (NA) detection, with the potential to discriminate mutated strands, is of paramount importance. Current techniques that rely on target amplification or protein-enzyme based signal amplification are highly relevant, yet still plagued by diverse drawbacks including erroneous target amplification, and the limited stability of protein enzymes. As a solution, we present a multicomponent nucleic acid enzymes (MNAzymes)-based system for singleplex and multiplex detection of NA targets in microwells down to femtomolar (fM) concentrations, without the need for any target amplification or protein enzymes, while operating at room temperature and with single base-pair resolution. After successful validation of the MNAzymes in solution, their performance was further verified on beads in bulk and in femtoliter-sized microwells. The latter is not only a highly simplified system compared to previous microwell-based bioassays but, with the detection limit of 180 fM, it is to-date the most sensitive NAzyme-mediated, bead-based approach, that does not rely on target amplification or any additional signal amplification strategies. Furthermore, we demonstrated, for the first time, multiplexed target detection in microwells, both from buffer and nasopharyngeal swab samples, and presented superior single base-pair resolution of this assay. Because of the design flexibility of MNAzymes and direct demonstration in swab samples, this system holds great promise for multiplexed detection in other clinically relevant matrices without the need for any additional NA or protein components. Moreover, these findings open up the potential for the development of next-generation, protein-free diagnostic tools, including digital assays with single-molecule resolution.
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Affiliation(s)
- Saba Safdar
- Department of Biosystems, Biosensors Group, KU Leuven, 3001, Leuven, Belgium
| | - Karen Ven
- Department of Biosystems, Biosensors Group, KU Leuven, 3001, Leuven, Belgium
| | - Julie van Lent
- Department of Biosystems, Biosensors Group, KU Leuven, 3001, Leuven, Belgium
| | - Benjamin Pavie
- VIB-KU Leuven Center for Brain & Disease Research, KU Leuven, 3000, Leuven, Belgium
| | - Iene Rutten
- Department of Biosystems, Biosensors Group, KU Leuven, 3001, Leuven, Belgium
| | - Annelies Dillen
- Department of Biosystems, Biosensors Group, KU Leuven, 3001, Leuven, Belgium
| | - Sebastian Munck
- VIB-KU Leuven Center for Brain & Disease Research, KU Leuven, 3000, Leuven, Belgium
| | - Jeroen Lammertyn
- Department of Biosystems, Biosensors Group, KU Leuven, 3001, Leuven, Belgium.
| | - Dragana Spasic
- Department of Biosystems, Biosensors Group, KU Leuven, 3001, Leuven, Belgium
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6
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Lu W, Lin C, Yang J, Wang X, Yao B, Wang M. A DNAzyme assay coupled with effective magnetic separation and rolling circle amplification for detection of lead cations with a smartphone camera. Anal Bioanal Chem 2019; 411:5383-5391. [DOI: 10.1007/s00216-019-01879-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/21/2019] [Accepted: 04/26/2019] [Indexed: 12/18/2022]
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7
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Pan J, Li Q, Zhou D, Chen J. Label-free and highly sensitive fluorescence detection of lead(ii) based on DNAzyme and exonuclease III-assisted cascade signal amplification. NEW J CHEM 2019. [DOI: 10.1039/c8nj06522e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A Pb2+ biosensor has been constructed based on Exo III-assisted cascade signal amplification using 2-amino-5,6,7-trimethyl-1,8-naphthyridine as the signal indicator.
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Affiliation(s)
- Jiafeng Pan
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management
- Guangdong Institute of Eco-Environmental Science & Technology
- Guangzhou 510650
- China
| | - Qiong Li
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management
- Guangdong Institute of Eco-Environmental Science & Technology
- Guangzhou 510650
- China
- College of Bioscience and Biotechnology
| | - Danhua Zhou
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management
- Guangdong Institute of Eco-Environmental Science & Technology
- Guangzhou 510650
- China
- College of Natural Resources and Environment
| | - Junhua Chen
- Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management
- Guangdong Institute of Eco-Environmental Science & Technology
- Guangzhou 510650
- China
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8
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Qu H, Wang L, Liu J, Zheng L. Direct Screening for Cytometric Bead Assays for Adenosine Triphosphate. ACS Sens 2018; 3:2071-2078. [PMID: 30084633 DOI: 10.1021/acssensors.8b00224] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Cytometric bead assays have caught much attention because of their many exceptional advantages. Unfortunately, the immobilization of existing molecular recognition elements including monoclonal antibodies and aptamers onto solid particles may lead to the functional failure of the molecular recognition elements since they are generally obtained in free state. Herein we develop a powerful screening approach for direct and rapid discovery of aptamer based cytometric bead assays (AB-CBAs) by individually measuring the functional activity of every aptamer particles in a library and sorting them at rates of up to 108 particles per hour. The strategy is based on the transformation of molecular libraries into pools of monoclonal aptamer particles so that one individual particle displays ∼105 copies of an identical aptamer sequence. Our library design incorporates a two-color fluorescent reporter system in which changes in aptamer structure generate an optical readout, such that we can use fluorescence-activated cell sorting to rapidly and selectively separate the individual aptamer particles that exhibit large fluorescent signal change upon target binding. For demonstration, we isolated AB-CBA aptamer particles with high signaling performance for ATP after just 3 rounds of screening. We believe that the rapid and direct screening features of this strategy make it an excellent platform for generating AB-CBAs for for a wide range of important analytes.
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Affiliation(s)
- Hao Qu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lu Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Jian Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
| | - Lei Zheng
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
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9
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Li Q, Jia Y, Feng Z, Liu F. A highly sensitive and selective fluorescent probe without quencher for detection of Pb2+ ions based on aggregation-caused quenching phenomenon. RSC Adv 2018; 8:38929-38934. [PMID: 35558300 PMCID: PMC9090614 DOI: 10.1039/c8ra07903j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 11/06/2018] [Indexed: 11/21/2022] Open
Abstract
Lead is a highly toxic heavy metal, and various functional nucleic acid (FNA)-based biosensors have been developed for the detection of Pb2+ in environmental monitoring. However, most fluorescence biosensors that have been reported were designed on the basis of a double-labeled (fluorophore and quencher group) DNA sequence, which not only involved an inconvenient organic synthesis but also restricted their wider use in practical applications. Here, we utilized a G-rich DNA sequence as a recognition probe and conjugated fluorene (CF) to develop a fluorescence sensor without a quencher based on the aggregation-caused quenching (ACQ) effect. In the presence of Pb2+, the degree of aggregation of CF was reduced because Pb2+ induced the formation of a G-quadruplex structure of the CF-DNA probe, and the fluorescence signal increased with the concentration of Pb2+ (0–1 μM), with a limit of detection of 0.36 nM. This fluorescent probe without a quencher enables the sensitive and selective detection of Pb2+. On the basis of these advantages, the CF-DNA probe represents a promising analytical method for detecting Pb2+. Fluorescent probe with only a fluorophore but no quencher for detecting Pb2+ on the basis of the aggregation-caused quenching (ACQ) phenomenon.![]()
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Affiliation(s)
- Qianyun Li
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- China
- Institute for Advanced Materials
| | - Yongmei Jia
- Institute for Advanced Materials
- Lingnan Normal University
- Zhanjiang 524048
- China
| | - Zongcai Feng
- Institute for Advanced Materials
- Lingnan Normal University
- Zhanjiang 524048
- China
| | - Fang Liu
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- China
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10
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Affiliation(s)
- Wenhu Zhou
- Xiangya
School of Pharmaceutical Sciences, Central South University, Changsha, Hunan 410013, China
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Runjhun Saran
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Juewen Liu
- Department
of Chemistry, Water Institute, and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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11
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Zhou Y, Zhang J, Tang L, Peng B, Zeng G, Luo L, Gao J, Pang Y, Deng Y, Zhang F. A label–free GR–5DNAzyme sensor for lead ions detection based on nanoporous gold and anionic intercalator. Talanta 2017; 165:274-281. [DOI: 10.1016/j.talanta.2016.12.069] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 12/19/2016] [Accepted: 12/24/2016] [Indexed: 12/23/2022]
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12
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Xu J, Wang Y, Yang L, Gao Y, Li B, Jin Y. A cytometric assay for ultrasensitive and robust detection of human telomerase RNA based on toehold strand displacement. Biosens Bioelectron 2017; 87:1071-1076. [DOI: 10.1016/j.bios.2016.08.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/12/2016] [Accepted: 08/13/2016] [Indexed: 12/31/2022]
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13
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Gan T, Zhao N, Yin G, Tu M, Liu J, Liu W. Mercaptopropionic acid-capped Mn-doped ZnS quantum dots as a probe for selective room-temperature phosphorescence detection of Pb2+ in water. NEW J CHEM 2017. [DOI: 10.1039/c7nj02625k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple, sensitive and selective phosphorescence method for rapid detection of Pb2+ in water based on Mn-doped ZnS QDs.
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Affiliation(s)
- Tingting Gan
- Key Laboratory of Environmental Optics and Technology
- Anhui Institute of Optics and Fine Mechanics
- Chinese Academy of Sciences
- Hefei
- China
| | - Nanjing Zhao
- Key Laboratory of Environmental Optics and Technology
- Anhui Institute of Optics and Fine Mechanics
- Chinese Academy of Sciences
- Hefei
- China
| | - Gaofang Yin
- Key Laboratory of Environmental Optics and Technology
- Anhui Institute of Optics and Fine Mechanics
- Chinese Academy of Sciences
- Hefei
- China
| | - Mengdi Tu
- Key Laboratory of Environmental Optics and Technology
- Anhui Institute of Optics and Fine Mechanics
- Chinese Academy of Sciences
- Hefei
- China
| | - Jianguo Liu
- Key Laboratory of Environmental Optics and Technology
- Anhui Institute of Optics and Fine Mechanics
- Chinese Academy of Sciences
- Hefei
- China
| | - Wenqing Liu
- Key Laboratory of Environmental Optics and Technology
- Anhui Institute of Optics and Fine Mechanics
- Chinese Academy of Sciences
- Hefei
- China
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14
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Cui H, Xiong X, Gao B, Chen Z, Luo Y, He F, Deng S, Chen L. A Novel Impedimetric Biosensor for Detection of Lead (II) with Low-cost Interdigitated Electrodes Made on PCB. ELECTROANAL 2016. [DOI: 10.1002/elan.201501153] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Haixia Cui
- School of Medical Information; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
| | - Xingliang Xiong
- School of Medical Information; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
| | - Bin Gao
- School of Medical Information; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
| | - Zhen Chen
- School of Medical Information; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
| | - Yiting Luo
- School of Medical Information; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
| | - Fengjie He
- School of Medical Information; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
| | - Shixiong Deng
- Department of Biomedical Engineering; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
| | - Longcong Chen
- School of Medical Information; Chongqing Medical University; No. 1, Yixueyuan Road, Yuzhong District Chongqing 400016 China
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15
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Zhou Y, Tang L, Zeng G, Zhang C, Xie X, Liu Y, Wang J, Tang J, Zhang Y, Deng Y. Label free detection of lead using impedimetric sensor based on ordered mesoporous carbon–gold nanoparticles and DNAzyme catalytic beacons. Talanta 2016; 146:641-7. [DOI: 10.1016/j.talanta.2015.06.063] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 06/15/2015] [Accepted: 06/20/2015] [Indexed: 11/26/2022]
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16
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Hou R, Niu X, Cui F. A label-free biosensor for selective detection of DNA and Pb2+ based on a G-quadruplex. RSC Adv 2016. [DOI: 10.1039/c5ra21939f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Schematic representation of the DNA and Pb2+ detection method.
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Affiliation(s)
- Ruipeng Hou
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
| | - Xiaoqing Niu
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
| | - Fengling Cui
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- College of Chemistry and Chemical Engineering
- Henan Normal University
- Xinxiang
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17
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Progress in the biosensing techniques for trace-level heavy metals. Biotechnol Adv 2016; 34:47-60. [DOI: 10.1016/j.biotechadv.2015.12.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/21/2015] [Accepted: 12/02/2015] [Indexed: 01/08/2023]
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18
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ZHAO XH, MENG HM, GONG L, QIU LP, ZHANG XB, TAN WH. Recent Progress of DNAzyme-Nanomaterial Based Biosensors. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2015. [DOI: 10.1016/s1872-2040(15)60873-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Paper-based scanometric assay for lead ion detection using DNAzyme. Anal Chim Acta 2015; 896:152-9. [DOI: 10.1016/j.aca.2015.09.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/01/2015] [Accepted: 09/04/2015] [Indexed: 11/18/2022]
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20
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Wang S, Sun J, Gao F. A turn-on near-infrared fluorescent chemosensor for selective detection of lead ions based on a fluorophore-gold nanoparticle assembly. Analyst 2015; 140:4001-6. [PMID: 25919909 DOI: 10.1039/c5an00320b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A turn-on fluorescent chemosensor of Pb(2+) in the near-infrared (NIR) region, which is based on the Pb(2+)-tuned restored fluorescence of a weakly fluorescent fluorophore-gold nanoparticle (AuNPs) assembly, has been reported. In this fluorophore-AuNP assembly, NIR fluorescent dye brilliant cresyl blue (BCB) molecules act as fluorophores and are used for signal transduction of fluorescence, while AuNPs act as quenchers to quench the nearby fluorescent BCB molecules via electron transfer. In the presence of Pb(2+), fluorescent BCB molecules detached from AuNPs and restored their fluorescence due to the formation of a chelating complex between Pb(2+) and glutathione confined on AuNPs. Under the optimal conditions, the present BCB-AuNP assembly is capable of detecting Pb(2+) with a concentration ranging from 7.5 × 10(-10) to 1 × 10(-8) mol L(-1) (0.16-2.1 ng mL(-1)) and a detection limit of 0.51 nM (0.11 ng mL(-1)). The present BCB-AuNP assembly can be used in aqueous media for the determination of Pb(2+) unlike common organic fluorescent reagents, and also shows advantages of NIR fluorescence spectrophotometry such as less interference, lower detection limit, and higher sensitivity. Moreover, the present method was successfully applied for the detection of Pb(2+) in water samples with satisfactory results.
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Affiliation(s)
- Shaozhen Wang
- Department of Pharmacy, Wannan Medical College, Wuhu 241002, P. R. China.
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21
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Zhang D, Fu R, Zhao Q, Rong H, Wang H. Nanoparticles-Free Fluorescence Anisotropy Amplification Assay for Detection of RNA Nucleotide-Cleaving DNAzyme Activity. Anal Chem 2015; 87:4903-9. [DOI: 10.1021/acs.analchem.5b00479] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Dapeng Zhang
- State
Key Laboratory of Environmental Chemistry and Ecotoxicology, Research
Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People’s Republic of China
| | - Rong Fu
- School
of Medicine and Life Sciences, University of Jinan-Shangdong Academy of Medical Sciences, Jinan 250062, People’s Republic of China
| | - Qiang Zhao
- State
Key Laboratory of Environmental Chemistry and Ecotoxicology, Research
Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People’s Republic of China
| | - Haiqin Rong
- School
of Medicine and Life Sciences, University of Jinan-Shangdong Academy of Medical Sciences, Jinan 250062, People’s Republic of China
| | - Hailin Wang
- State
Key Laboratory of Environmental Chemistry and Ecotoxicology, Research
Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People’s Republic of China
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22
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Li L, Feng J, Fan Y, Tang B. Simultaneous Imaging of Zn2+ and Cu2+ in Living Cells Based on DNAzyme Modified Gold Nanoparticle. Anal Chem 2015; 87:4829-35. [DOI: 10.1021/acs.analchem.5b00204] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lu Li
- College of Chemistry,
Chemical
Engineering and Materials Science, Collaborative Innovation Center
of Functionalized Probes for Chemical Imaging in Universities of Shandong,
Key Laboratory of Molecular and Nano Probes, Ministry of Education,
Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Jie Feng
- College of Chemistry,
Chemical
Engineering and Materials Science, Collaborative Innovation Center
of Functionalized Probes for Chemical Imaging in Universities of Shandong,
Key Laboratory of Molecular and Nano Probes, Ministry of Education,
Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Yuanyuan Fan
- College of Chemistry,
Chemical
Engineering and Materials Science, Collaborative Innovation Center
of Functionalized Probes for Chemical Imaging in Universities of Shandong,
Key Laboratory of Molecular and Nano Probes, Ministry of Education,
Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Bo Tang
- College of Chemistry,
Chemical
Engineering and Materials Science, Collaborative Innovation Center
of Functionalized Probes for Chemical Imaging in Universities of Shandong,
Key Laboratory of Molecular and Nano Probes, Ministry of Education,
Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
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23
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Zhang Y, Liu C, Sun S, Tang Y, Li Z. Phosphorylation-induced hybridization chain reaction on beads: an ultrasensitive flow cytometric assay for the detection of T4 polynucleotide kinase activity. Chem Commun (Camb) 2015; 51:5832-5. [DOI: 10.1039/c5cc00572h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A versatile flow cytometric bead assay (FCBA) has been developed for an ultrasensitive detection of T4 PNK activity.
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Affiliation(s)
- Yuecheng Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
| | - Chenghui Liu
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
| | - Sujuan Sun
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
| | - Yanli Tang
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
| | - Zhengping Li
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
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24
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Zhang L, Huang H, Xu N, Yin Q. Functionalization of cationic poly(p-phenylene ethynylene) with dendritic polyethylene enables efficient DNAzyme delivery for imaging Pb 2+ in living cells. J Mater Chem B 2014; 2:4935-4942. [PMID: 32261786 DOI: 10.1039/c4tb00680a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We report here an effective Pb2+-dependent DNAzyme (8-17 DNAzyme) delivery system based on the water-soluble dendritic polyethylene-cationic poly(p-phenylene ethynylene) for successfully imaging Pb2+ in living cells. For utilizing the 8-17 DNAzyme and its unique ability to catalyze a phosphodiester bond cleavage reaction in the presence of Pb2+, the distinctive conjugated polymer-based polyvalent nanocarrier design manages to load and transport 8-17 DNAzyme across cell membranes, and to realize the fluorescence imaging of Pb2+ in living cells. As shown by the confocal microscopy and flow cytometry observations, the fluorescence of Cy5.5 is obviously activated under the conditions of incubation with Pb2+, compared with the absence of Pb2+. Taken together, the study demonstrates the combination of the molecular-wire effect with "dendrimer effects" on their effective DNAzyme delivery and their cellular imaging Pb2+.
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Affiliation(s)
- Ling Zhang
- DSAPM Lab, PCFM Lab, and OFCM Institu, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
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25
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Sett A, Das S, Bora U. Functional nucleic-acid-based sensors for environmental monitoring. Appl Biochem Biotechnol 2014; 174:1073-91. [PMID: 24903959 DOI: 10.1007/s12010-014-0990-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 05/19/2014] [Indexed: 01/16/2023]
Abstract
Efforts to replace conventional chromatographic methods for environmental monitoring with cheaper and easy to use biosensors for precise detection and estimation of hazardous environmental toxicants, water or air borne pathogens as well as various other chemicals and biologics are gaining momentum. Out of the various types of biosensors classified according to their bio-recognition principle, nucleic-acid-based sensors have shown high potential in terms of cost, sensitivity, and specificity. The discovery of catalytic activities of RNA (ribozymes) and DNA (DNAzymes) which could be triggered by divalent metallic ions paved the way for their extensive use in detection of heavy metal contaminants in environment. This was followed with the invention of small oligonucleotide sequences called aptamers which can fold into specific 3D conformation under suitable conditions after binding to target molecules. Due to their high affinity, specificity, reusability, stability, and non-immunogenicity to vast array of targets like small and macromolecules from organic, inorganic, and biological origin, they can often be exploited as sensors in industrial waste management, pollution control, and environmental toxicology. Further, rational combination of the catalytic activity of DNAzymes and RNAzymes along with the sequence-specific binding ability of aptamers have given rise to the most advanced form of functional nucleic-acid-based sensors called aptazymes. Functional nucleic-acid-based sensors (FNASs) can be conjugated with fluorescent molecules, metallic nanoparticles, or quantum dots to aid in rapid detection of a variety of target molecules by target-induced structure switch (TISS) mode. Although intensive research is being carried out for further improvements of FNAs as sensors, challenges remain in integrating such bio-recognition element with advanced transduction platform to enable its use as a networked analytical system for tailor made analysis of environmental monitoring.
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Affiliation(s)
- Arghya Sett
- Bioengineering Research Laboratory, Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
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26
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Abstract
Increasing interest in detecting metal ions in many chemical and biomedical fields has created demands for developing sensors and imaging agents for metal ions with high sensitivity and selectivity. This review covers recent progress in DNA-based sensors and imaging agents for metal ions. Through both combinatorial selection and rational design, a number of metal-ion-dependent DNAzymes and metal-ion-binding DNA structures that can selectively recognize specific metal ions have been obtained. By attachment of these DNA molecules with signal reporters such as fluorophores, chromophores, electrochemical tags, and Raman tags, a number of DNA-based sensors for both diamagnetic and paramagnetic metal ions have been developed for fluorescent, colorimetric, electrochemical, and surface Raman detection. These sensors are highly sensitive (with a detection limit down to 11 ppt) and selective (with selectivity up to millions-fold) toward specific metal ions. In addition, through further development to simplify the operation, such as the use of "dipstick tests", portable fluorometers, computer-readable disks, and widely available glucose meters, these sensors have been applied for on-site and real-time environmental monitoring and point-of-care medical diagnostics. The use of these sensors for in situ cellular imaging has also been reported. The generality of the combinatorial selection to obtain DNAzymes for almost any metal ion in any oxidation state and the ease of modification of the DNA with different signal reporters make DNA an emerging and promising class of molecules for metal-ion sensing and imaging in many fields of applications.
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Affiliation(s)
- Yu Xiang
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Fax: 217-244-3186; Tel: 217-333-2619
| | - Yi Lu
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Fax: 217-244-3186; Tel: 217-333-2619
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27
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Bahrami A, Besharati-Seidani A, Abbaspour A, Shamsipur M. A highly selective voltammetric sensor for sub-nanomolar detection of lead ions using a carbon paste electrode impregnated with novel ion imprinted polymeric nanobeads. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.11.180] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Wu J, Zhu Y, Xue F, Mei Z, Yao L, Wang X, Zheng L, Liu J, Liu G, Peng C, Chen W. Recent trends in SELEX technique and its application to food safety monitoring. Mikrochim Acta 2014; 181:479-491. [PMID: 25419005 DOI: 10.1007/s00604-013-1156-7] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The method referred to as "systemic evolution of ligands by exponential enrichment" (SELEX) was introduced in 1990 and ever since has become an important tool for the identification and screening of aptamers. Such nucleic acids can recognize and bind to their corresponding targets (analytes) with high selectivity and affinity, and aptamers therefore have become attractive alternatives to traditional antibodies not the least because they are much more stable. Meanwhile, they have found numerous applications in different fields including food quality and safety monitoring. This review first gives an introduction into the selection process and to the evolution of SELEX, then covers applications of aptamers in the surveillance of food safety (with subsections on absorptiometric, electrochemical, fluorescent and other methods), and then gives conclusions and perspectives. The SELEX method excels by its features of in vitro, high throughput and ease of operation. This review contains 86 references.
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Affiliation(s)
- Jingjing Wu
- School of Biotechnology and Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Yingyue Zhu
- School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu 215500, People's Republic of China
| | - Feng Xue
- School of Biotechnology and Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Zhanlong Mei
- School of Biotechnology and Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Li Yao
- School of Biotechnology and Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Xin Wang
- School of Biotechnology and Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Lei Zheng
- School of Medical Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Jian Liu
- School of Biotechnology and Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Guodong Liu
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND 58108, USA
| | - Chifang Peng
- School Food Science & Technology, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Wei Chen
- School of Biotechnology and Food Engineering, Anhui Provincial Key Lab of Functional Materials & Devices, Hefei University of Technology, Hefei 230009, People's Republic of China
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29
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Zhang D, Yin L, Meng Z, Yu A, Guo L, Wang H. A sensitive fluorescence anisotropy method for detection of lead (II) ion by a G-quadruplex-inducible DNA aptamer. Anal Chim Acta 2014; 812:161-7. [PMID: 24491777 DOI: 10.1016/j.aca.2013.12.029] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 12/10/2013] [Accepted: 12/24/2013] [Indexed: 12/27/2022]
Abstract
Sensitive and selective detection of Pb(2+) is of great importance to both human health and environmental protection. Here we propose a novel fluorescence anisotropy (FA) approach for sensing Pb(2+) in homogeneous solution by a G-rich thrombin binding aptamer (TBA). The TBA labeled with 6-carboxytetramethylrhodamine (TMR) at the seventh thymine nucleotide was used as a fluorescent probe for signaling Pb(2+). It was found that the aptamer probe had a high FA in the absence of Pb(2+). This is because the rotation of TMR is restricted by intramolecular interaction with the adjacent guanine bases, which results in photoinduced electron transfer (PET). When the aptamer probe binds to Pb(2+) to form G-quadruplex, the intramolecular interaction should be eliminated, resulting in faster rotation of the fluorophore TMR in solution. Therefore, FA of aptamer probe is expected to decrease significantly upon binding to Pb(2+). Indeed, we observed a decrease in FA of aptamer probe upon Pb(2+) binding. Circular dichroism, fluorescence spectra, and fluorescence lifetime measurement were used to verify the reliability and reasonability of the sensing mechanism. By monitoring the FA change of the aptamer probe, we were able to real-time detect binding between the TBA probe and Pb(2+). Moreover, the aptamer probe was exploited as a recognition element for quantification of Pb(2+) in homogeneous solution. The change in FA showed a linear response to Pb(2+) from 10 nM to 2.0 μM, with 1.0 nM limit of detection. In addition, this sensing system exhibited good selectivity for Pb(2+) over other metal ions. The method is simple, quick and inherits the advantages of aptamer and FA.
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Affiliation(s)
- Dapeng Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Lei Yin
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Zihui Meng
- School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Anchi Yu
- Department of Chemistry, Renmin University of China, Beijing, 100872, PR China
| | - Lianghong Guo
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Hailin Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China.
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30
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Lv M, Wang X, Li J, Yang X, Zhang C, Yang J, Hu H. Cyclodextrin-reduced graphene oxide hybrid nanosheets for the simultaneous determination of lead(II) and cadmium(II) using square wave anodic stripping voltammetry. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.06.099] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Ren W, Liu H, Yang W, Fan Y, Yang L, Wang Y, Liu C, Li Z. A cytometric bead assay for sensitive DNA detection based on enzyme-free signal amplification of hybridization chain reaction. Biosens Bioelectron 2013; 49:380-6. [PMID: 23807231 DOI: 10.1016/j.bios.2013.05.055] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 05/19/2013] [Accepted: 05/30/2013] [Indexed: 01/20/2023]
Abstract
A versatile flow cytometric bead assay (CBA) is developed for sensitive DNA detection by integrating the advantages of hybridization chain reaction (HCR) for enzyme-free signal amplification, flow cytometry for robust and rapid signal readout as well as magnetic beads (MBs) for facile separation. In this HCR-CBA, a biotinylated hairpin DNA (Bio-H1) is firstly immobilized on streptavidin-functionalized MBs. Upon the addition of target DNA, each target would hybridize with one Bio-H1 to open its hairpin structure and subsequently initiate a cascade of hybridization events between two species of fluorescent DNA hairpin probes (H1*/H2*) to form a nicked double helical DNA structure, resulting in amplified accumulation of numerous fluorophores on the MBs. Finally, the fluorescent MBs are directly analyzed by flow cytometry. This technique enables quantitative analysis of the HCR products anchored on the MBs as a function of target DNA concentration, and analysis of each sample can be completed within few minutes. Therefore, the HCR-CBA approach provides a practical DNA assay with greatly improved sensitivity. The detection limit of a model DNA target is 0.5 pM (3σ), which is about 3 orders of magnitude lower compared with traditional hybridization methods without HCR. Furthermore, the signal of complementary target can be clearly distinguished from that of single-base mismatched sequences, indicating the high specificity of the HCR-CBA. Moreover, this strategy is also successfully applied to the DNA analysis in complex biological samples, showing great potential in gene analysis and disease diagnosis in clinical samples.
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Affiliation(s)
- Wei Ren
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei Province, PR China
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32
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Zhuang J, Fu L, Xu M, Zhou Q, Chen G, Tang D. DNAzyme-based magneto-controlled electronic switch for picomolar detection of lead (II) coupling with DNA-based hybridization chain reaction. Biosens Bioelectron 2013; 45:52-7. [PMID: 23454343 DOI: 10.1016/j.bios.2013.01.039] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Revised: 01/21/2013] [Accepted: 01/22/2013] [Indexed: 12/16/2022]
Abstract
A novel magneto-controlled electrochemical DNA biosensor is designed for the ultrasensitive detection of lead coupling a lead-specific DNAzyme with DNA-based hybridization chain reaction (HCR). To construct such a magnetic lead sensor, DNAzyme-based molecular beacons, selective to cleavage in the presence of Pb(2+), are initially immobilized onto magnetic beads, which were used as the recognition elements. Upon addition of target lead, catalytic cleavage of substrate DNA segments in the double-stranded DNAzymes results in the capture of the initiator strands via the conjugated catalytic strands on magnetic beads. The captured DNA initiator strands trigger the hybridization chain reaction between two alternating hairpin DNA structures labeled with ferrocene to form a nicked double-helix on the magnetic beads. Numerous ferrocene molecules are formed on the neighboring probes, each of which produces an electrochemical signal within the applied potential. Under optimal conditions, the electrochemical signal of the magnetic lead sensor increases with the increasing lead level in the sample, and exhibits a linear response over a Pb(2+) concentration range of 0.1-75 nM with a detection limit of 37 pM. Quantitative measurement of Pb(2+) in the complex sample demonstrates the selectivity of the sensor scheme and points favorably to the application of such technologies to the analysis of environmental samples. The unique combination of a DNAzyme with hybridization chain reaction makes it possible to change the DNAzyme to select for other compounds of interest. This work represents the initial steps toward the creation of a robust field sensor for lead in groundwater or drinking water.
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Affiliation(s)
- Junyang Zhuang
- Ministry of Education & Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Department of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, PR China
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33
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Zhan S, Wu Y, Liu L, Xing H, He L, Zhan X, Luo Y, Zhou P. A simple fluorescent assay for lead(ii) detection based on lead(ii)-stabilized G-quadruplex formation. RSC Adv 2013. [DOI: 10.1039/c3ra42621a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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34
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Wang HB, Wang L, Huang KJ, Xu SP, Wang HQ, Wang LL, Liu YM. A highly sensitive and selective biosensing strategy for the detection of Pb2+ ions based on GR-5 DNAzyme functionalized AuNPs. NEW J CHEM 2013. [DOI: 10.1039/c3nj00328k] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Li X, Wang G, Ding X, Chen Y, Gou Y, Lu Y. A “turn-on” fluorescent sensor for detection of Pb2+ based on graphene oxide and G-quadruplex DNA. Phys Chem Chem Phys 2013; 15:12800-4. [DOI: 10.1039/c3cp00047h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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36
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Gao A, Tang CX, He XW, Yin XB. Electrochemiluminescent lead biosensor based on GR-5 lead-dependent DNAzyme for Ru(phen)3(2+) intercalation and lead recognition. Analyst 2012; 138:263-8. [PMID: 23120751 DOI: 10.1039/c2an36398d] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An electrochemiluminescent (ECL) lead biosensor was developed based on GR-5 lead-dependent DNAzyme for lead recognition and intercalated ruthenium tris(1,10-phenanthroline) (Ru(phen)(3)(2+)) as the ECL probe. The thiol-modified substrate was first immobilized on the surface of the gold electrode via gold-sulfur self-assembly. Subsequently, the hybridization of DNAzyme and its substrate and the automatic intercalation of Ru(phen)(3)(2+) proceeded. Intercalated Ru(phen)(3)(2+) can transfer electrons through double-stranded DNA to the electrode and its electrochemiluminescence was excited with a potential step using tripropylamine as the coreactant. In the presence of lead, the substrate cleaves at the scissile ribo-adenine into two fragments. The dissociation of DNAzyme occurs, leading to the releasing of intercalated Ru(phen)(3)(2+) accompanied by a decrease in the intensity of electrochemiluminescence. A quantity of lead can be calculated from this decrease. The biosensor is highly sensitive and specific, along with an ultra-low limit of detection of 0.9 pM and a dynamic range from 2 to 1000 pM. It enables analysis of trace amounts of lead in serum samples. The combination of the intercalated-Ru(phen)(3)(2+) ECL probe and the cofactor-dependent DNAzyme may push the performance of cofactor-sensing tactics to the extreme.
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Affiliation(s)
- Ai Gao
- State Key Laboratory of Medicinal Chemical Biology, College of Chemistry, Nankai University, Tianjin, 300071, P.R. China
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37
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Hu K, Yang H, Zhou J, Zhao S, Tian J. Aptasensor for amplified IgE sensing based on fluorescence quenching by graphene oxide. LUMINESCENCE 2012; 28:662-6. [PMID: 22949376 DOI: 10.1002/bio.2412] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 07/06/2012] [Accepted: 07/06/2012] [Indexed: 12/24/2022]
Abstract
Water-soluble graphene oxide (GO) with a two-dimensional layered nanostructure was synthesized and used as a quencher to construct a highly sensitive and selective fluorescence resonance energy transfer (FRET) aptasensor for sensing Immunoglobulin E (IgE). The fluorescein isothiocyanate (FITC)-labeled aptamer could be adsorbed stably onto the surface of GO via π → π stacking interaction, which led to the occurrence of FRET from FITC to GO, and the fluorescence of FITC-labeled aptamer was quenched by GO via energy transfer. In the presence of IgE, the fluorescence was recovered due to a higher affinity between the aptamer and IgE compared with interactions between GO and the aptamer, leading to a high signal-to-background ratio. The fluorescence intensity of the aptamer increased in proportion to the amount of IgE in the sample,so that IgE could be detected with a linear range of 60-225 pM and a detection limit of 22 pM. The assay was highly selective because the aptamer was unaffected by the presence of immunoglobulin G (IgG), human serum albumin (HSA) and bovine serum albumin (BSA). The practical application of the proposed aptasensor was successfully carried out for the determination of IgE in human serum samples.
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Affiliation(s)
- Kun Hu
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin, 541004, China
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38
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Lu Y, Li X, Wang G, Tang W. A highly sensitive and selective optical sensor for Pb2+ by using conjugated polymers and label-free oligonucleotides. Biosens Bioelectron 2012; 39:231-5. [PMID: 22883751 DOI: 10.1016/j.bios.2012.07.045] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 07/21/2012] [Accepted: 07/23/2012] [Indexed: 12/20/2022]
Abstract
The detection of Pb(2+) with DNA-based biosensor is usually susceptible to severe interference from Hg(2+) because of the T-Hg(2+)-T interaction between Hg(2+) and T residues. In this study, we developed a rapid, sensitive, selective and label-free sensor for the detection of Pb(2+) in the presence of Hg(2+) based on the Pb(2+)-induced G-quadruplex formation with cationic water-soluble conjugated polymer (PMNT) as a "polymeric stain" to transduce optical signal. We selected a specific sequence oligonucleotide, TBAA (5'-GGAAGGTGTGGAAGG-3'), which can form a G-quadruplex structure upon the addition of Pb(2+). This strategy provided a promising alternative to Pb(2+) determination in the presence of Hg(2+) instead of the universal masking agents of Hg(2+) (such as CN(-), SCN(-)). Based on this observation, a simple "mix-and-detect" optical sensor for the detection of Pb(2+) was proposed due to the distinguishable optical properties of PMNT-ssDNA and PMNT-(G-quadruplex) complexes. By this method, we could identify micromolar Pb(2+) concentrations within 5min even with the naked eye. Furthermore, the detection limit was improved to the nanomolar range by the fluorometric method. We also successfully utilized this biosensor for the determination of Pb(2+) in tap water samples.
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Affiliation(s)
- Yan Lu
- School of Chemistry and Environmental Science, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China.
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39
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Pelossof G, Tel-Vered R, Willner I. Amplified Surface Plasmon Resonance and Electrochemical Detection of Pb2+ Ions Using the Pb2+-Dependent DNAzyme and Hemin/G-Quadruplex as a Label. Anal Chem 2012; 84:3703-9. [DOI: 10.1021/ac3002269] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Gilad Pelossof
- Institute of Chemistry, The Center
for Nanoscience
and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Ran Tel-Vered
- Institute of Chemistry, The Center
for Nanoscience
and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Itamar Willner
- Institute of Chemistry, The Center
for Nanoscience
and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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Hu K, Huang Y, Zhao S, Tian J, Wu Q, Zhang G, Jiang J. Ultrasensitive detection of potassium ions based on target induced DNA conformational switch enhanced fluorescence polarization. Analyst 2012; 137:2770-3. [DOI: 10.1039/c2an35416k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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