51
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Elucidation of the mechanism of single-stranded DNA interaction with methylene blue: A spectroscopic approach. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.11.020] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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52
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Electrochemical biosensors for detection of point mutation based on surface ligation reaction and oligonucleotides modified gold nanoparticles. Anal Chim Acta 2011; 688:163-7. [PMID: 21334481 DOI: 10.1016/j.aca.2011.01.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 12/21/2010] [Accepted: 01/04/2011] [Indexed: 11/23/2022]
Abstract
An electrochemical method for point mutation detection based on surface ligation reaction and oligonucleotides (ODNs) modified gold nanoparticles (AuNPs) was demonstrated. Point mutation identification was achieved using Escherichia coli DNA ligase. This system for point mutation detection relied on a sandwich assay comprising capture ODN immobilized on Au electrodes, target ODN and ligation ODN. Because of the sequence-specific surface reactions of E. coli DNA ligase, the ligation ODN covalently linked to the capture ODN only in the presence of a perfectly complementary target ODN. The presence of ligation products on Au electrode was detected using chronocoulometry through hybridization with reporter ODN modified AuNPs. The use of AuNPs improved the sensitivity of chronocoulometry in this approach, a detection limit of 0.9 pM complementary ODN was obtained. For single base mismatched ODN (smODN), a negligible signal was observed. Even if the concentration ratio of complementary ODN to smODN was decreased to 1:1000, a detectable signal was observed. This work may provide a specific, sensitive and cost-efficient approach for point mutant detection.
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53
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Development of an electrochemical DNA biosensor with a high sensitivity of fM by dendritic gold nanostructure modified electrode. Biosens Bioelectron 2011; 26:2619-25. [DOI: 10.1016/j.bios.2010.11.020] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Revised: 11/14/2010] [Accepted: 11/15/2010] [Indexed: 11/22/2022]
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54
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Zheng Y, Li Y, Lu N, Deng Z. Surface-initiated DNA self-assembly as an enzyme-free and nanoparticle-free strategy towards signal amplification of an electrochemical DNA sensor. Analyst 2011; 136:459-62. [DOI: 10.1039/c0an00761g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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55
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Chen J, Zhang J, Guo Y, Li J, Fu F, Yang HH, Chen G. An ultrasensitive electrochemical biosensor for detection of DNA species related to oral cancer based on nuclease-assisted target recycling and amplification of DNAzyme. Chem Commun (Camb) 2011; 47:8004-6. [DOI: 10.1039/c1cc11929j] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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56
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Ultratrace voltammetric method for the detection of DNA sequence related to human immunodeficiency virus type 1. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0490-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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57
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Liu S, Liu J, Wang L, Zhao F. Development of electrochemical DNA biosensor based on gold nanoparticle modified electrode by electroless deposition. Bioelectrochemistry 2010; 79:37-42. [DOI: 10.1016/j.bioelechem.2009.10.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2009] [Revised: 10/14/2009] [Accepted: 10/21/2009] [Indexed: 11/28/2022]
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58
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Substantial Influence of Temperature on Anchoring of Gold-Nanoparticle Monolayer for Performance of DNA Biosensors. ELECTROANAL 2010. [DOI: 10.1002/elan.201000241] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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59
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Stadler A, Chi C, van der Lelie D, Gang O. DNA-incorporating nanomaterials in biotechnological applications. Nanomedicine (Lond) 2010; 5:319-34. [PMID: 20148641 DOI: 10.2217/nnm.10.2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The recently developed ability to controllably connect biological and inorganic objects on a molecular scale opens a new page in biomimetic methods with potential applications in biodetection, tissue engineering, targeted therapeutics and drug/gene delivery. Particularly in the biodetection arena, a rapid development of new platforms has largely been stimulated by a spectrum of novel nanomaterials with physical properties that offer efficient, sensitive and inexpensive molecular sensing. Recently, DNA-functionalized nano-objects have emerged as a new class of nanomaterials that can be controllably assembled in predesigned structures. Such DNA-based nanoscale structures might provide a new detection paradigm due to their regulated optical, electrical and magnetic responses, chemical heterogeneity and high local biomolecular concentration. The specific biorecognition DNA and its physical-chemical characteristics allows for an exploitation of DNA-functionalized nanomaterials for sensing of nucleic acids, while a broad tunability of DNA interactions permits extending their use for detection of proteins, small molecules and ions. We discuss the progress that was achieved in the last decade in the exploration of new detection methods based on DNA-incorporating nanomaterials as well as their applications to gene delivery. The comparison between various detection platforms, their sensitivity and selectivity, and specific applications are reviewed.
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Affiliation(s)
- Andrea Stadler
- Biology Department, Brookhaven National Laboratory, Upton, New York, NY 11973, USA
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60
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Nanoparticles for detection and diagnosis. Adv Drug Deliv Rev 2010; 62:316-28. [PMID: 19913581 DOI: 10.1016/j.addr.2009.11.004] [Citation(s) in RCA: 199] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Accepted: 10/17/2009] [Indexed: 01/19/2023]
Abstract
Nanoparticle based platforms for identification of chemical and biological agents offer substantial benefits to biomedical and environmental science. These platforms benefit from the availability of a wide variety of core materials as well as the unique physical and chemical properties of these nanoscale materials. This review surveys some of the emerging approaches in the field of nanoparticle based detection systems, highlighting the nanoparticle based screening methods for metal ions, proteins, nucleic acids, and biologically relevant small molecules.
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61
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Liu S, Liu J, Han X, Cui Y, Wang W. Electrochemical DNA biosensor fabrication with hollow gold nanospheres modified electrode and its enhancement in DNA immobilization and hybridization. Biosens Bioelectron 2010; 25:1640-5. [DOI: 10.1016/j.bios.2009.11.026] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2009] [Revised: 11/26/2009] [Accepted: 11/27/2009] [Indexed: 01/20/2023]
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62
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Sensitive impedimetric DNA biosensor with poly(amidoamine) dendrimer covalently attached onto carbon nanotube electronic transducers as the tether for surface confinement of probe DNA. Biosens Bioelectron 2010; 25:1498-503. [DOI: 10.1016/j.bios.2009.11.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 10/22/2009] [Accepted: 11/08/2009] [Indexed: 11/21/2022]
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63
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Bi S, Zhang J, Zhang S. Ultrasensitive and selective DNA detection based on nicking endonuclease assisted signal amplification and its application in cancer cell detection. Chem Commun (Camb) 2010; 46:5509-11. [DOI: 10.1039/c0cc00127a] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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64
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Cai S, Xin L, Lau C, Lu J. Highly sensitive non-stripping gold nanoparticles-based chemiluminescent detection of DNA hybridization coupled to magnetic beads. Analyst 2010; 135:615-20. [DOI: 10.1039/b927359j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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65
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Chen J, Zhang J, Li J, Fu F, Yang HH, Chen G. An ultrahighly sensitive and selective electrochemical DNA sensor via nicking endonuclease assisted current change amplification. Chem Commun (Camb) 2010; 46:5939-41. [DOI: 10.1039/c0cc00748j] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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66
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Sequence-specific detection of trace DNA via a junction-probe electrochemical sensor employed template-enhanced hybridization strategy. Biosens Bioelectron 2009; 25:815-9. [DOI: 10.1016/j.bios.2009.08.032] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Revised: 08/20/2009] [Accepted: 08/21/2009] [Indexed: 11/24/2022]
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67
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Du P, Li H, Cao W. Construction of DNA sandwich electrochemical biosensor with nanoPbS and nanoAu tags on magnetic microbeads. Biosens Bioelectron 2009; 24:3223-8. [DOI: 10.1016/j.bios.2009.04.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Revised: 03/23/2009] [Accepted: 04/06/2009] [Indexed: 10/20/2022]
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68
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Li J, Song S, Li D, Su Y, Huang Q, Zhao Y, Fan C. Multi-functional crosslinked Au nanoaggregates for the amplified optical DNA detection. Biosens Bioelectron 2009; 24:3311-5. [DOI: 10.1016/j.bios.2009.04.029] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2009] [Revised: 03/31/2009] [Accepted: 04/17/2009] [Indexed: 10/20/2022]
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69
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Li G, Li X, Wan J, Zhang S. Dendrimers-based DNA biosensors for highly sensitive electrochemical detection of DNA hybridization using reporter probe DNA modified with Au nanoparticles. Biosens Bioelectron 2009; 24:3281-7. [DOI: 10.1016/j.bios.2009.04.022] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Revised: 04/10/2009] [Accepted: 04/14/2009] [Indexed: 11/27/2022]
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70
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Yang GJ, Huang JL, Meng WJ, Shen M, Jiao XA. A reusable capacitive immunosensor for detection of Salmonella spp. based on grafted ethylene diamine and self-assembled gold nanoparticle monolayers. Anal Chim Acta 2009; 647:159-66. [PMID: 19591700 DOI: 10.1016/j.aca.2009.06.008] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Revised: 05/31/2009] [Accepted: 06/03/2009] [Indexed: 11/27/2022]
Abstract
Fabrication of a novel capacitive immunosensor based on grafted ethylene diamine and self-assembled gold nanoparticle monolayer on glassy carbon electrode for the detection of Salmonella spp. is described for the first time. In the present study, the Salmonella spp. monoclonal antibodies (denoted as McAbs) was immobilized on gold nanoparticles. Interaction of McAbs and Salmonella spp. was detected directly using the electrochemical impedance spectroscopy (EIS) technique. The experimental results showed that the concentration of antigen was measured through the relative change in capacitance in the corresponding specific binding of Salmonella spp. and McAbs. Under the optimized conditions, the relative changes in capacitance were proportional to the logarithmic values of Salmonella spp. concentrations in the range of 1.0 x 10(2) to 1.0 x 10(5) CFU mL(-1) (r = 0.991) with the detection limit of 1.0 x 10(2) CFU mL(-1). The stability of proposed immunosensor could be estimated by determining the relative change in capacitance, which remained almost the same in two months and decreased gradually to 85.3% of initial value after four months' storage. The used immunosensor could be regenerated repeatedly by immersing in glycine-HCl buffer solution (pH 2.8). Finally, the proposed immunosensor was successfully used for the detection of Salmonella spp. in lab-processed commercial pork samples.
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Affiliation(s)
- Gong-Jun Yang
- College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
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71
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Hu K, Liu P, Ye S, Zhang S. Ultrasensitive electrochemical detection of DNA based on PbS nanoparticle tags and nanoporous gold electrode. Biosens Bioelectron 2009; 24:3113-9. [PMID: 19419853 DOI: 10.1016/j.bios.2009.04.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 03/09/2009] [Accepted: 04/02/2009] [Indexed: 11/30/2022]
Abstract
An electrochemical stripping assay for ultrasensitive detection of target DNA was reported in this work. The protocol involved nanoporous gold (NPG) electrode modified with single-stranded DNA (ssDNA) and Au nanoparticles (Au-NPs) co-loaded with two kinds of ssDNA, one was reporter DNA which was complementary to the target DNA, the other modified with PbS nanoparticles (PbS-NPs) was signal DNA which was non-complemented, reducing the cross-reaction between the targets and reporter DNA on the same Au-NP. The amount of target DNA was determined by indirect determination of the amount of lead ions through differential pulse anodic stripping voltammetry (DPASV). This protocol could detect target DNA of as low as femtomolar and exhibited excellent selectivity against one-base mismatched DNA and non-complementary DNA. Under the optimum conditions, the anodic stripping peak current of lead demonstrated a good linear relationship with the target DNA concentration in the range of 9.0x10(-16) to 7.0x10(-14) M. A detection limit of 2.6x10(-16) M of target DNA was achieved.
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Affiliation(s)
- Kongcheng Hu
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
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72
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Du P, Li H, Mei Z, Liu S. Electrochemical DNA biosensor for the detection of DNA hybridization with the amplification of Au nanoparticles and CdS nanoparticles. Bioelectrochemistry 2009; 75:37-43. [DOI: 10.1016/j.bioelechem.2009.01.003] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Revised: 01/14/2009] [Accepted: 01/15/2009] [Indexed: 10/21/2022]
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73
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Mani V, Chikkaveeraiah BV, Patel V, Gutkind JS, Rusling JF. Ultrasensitive immunosensor for cancer biomarker proteins using gold nanoparticle film electrodes and multienzyme-particle amplification. ACS NANO 2009; 3:585-94. [PMID: 19216571 PMCID: PMC2666939 DOI: 10.1021/nn800863w] [Citation(s) in RCA: 358] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A densely packed gold nanoparticle platform combined with a multiple-enzyme labeled detection antibody-magnetic bead bioconjugate was used as the basis for an ultrasensitive electrochemical immunosensor to detect cancer biomarkers in serum. Sensitivity was greatly amplified by synthesizing magnetic bioconjugates particles containing 7500 horseradish peroxidase (HRP) labels along with detection antibodies (Ab2) attached to activated carboxyl groups on 1 microm diameter magnetic beads. These sensors had sensitivity of 31.5 microA mL ng(-1) and detection limit (DL) of 0.5 pg mL(-1) for prostate specific antigen (PSA) in 10 microL of undiluted serum. This represents an ultralow mass DL of 5 fg PSA, 8-fold better than a previously reported carbon nanotube (CNT) forest immunosensor featuring multiple labels on carbon nanotubes, and near or below the normal serum levels of most cancer biomarkers. Measurements of PSA in cell lysates and human serum of cancer patients gave excellent correlations with standard ELISA assays. These easily fabricated AuNP immunosensors show excellent promise for future fabrication of bioelectronic arrays.
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Affiliation(s)
- Vigneshwaran Mani
- Department of Chemistry, 55 N. Eagleville Rd., University of Connecticut, Storrs, Connecticut 06269
| | | | - Vyomesh Patel
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892
| | - J. Silvio Gutkind
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892
| | - James F. Rusling
- Department of Chemistry, 55 N. Eagleville Rd., University of Connecticut, Storrs, Connecticut 06269
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT 06032
- Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269
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74
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A netlike DNA-templated Au nanoconjugate as the matrix of the direct electrochemistry of horseradish peroxidase. Electrochem commun 2009. [DOI: 10.1016/j.elecom.2008.12.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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75
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76
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Zhong H, Lei X, Hun X, Zhang S. Design of one-to-one recognition triple Au nanoparticles DNA probe and its application in the electrochemical DNA biosensor. Chem Commun (Camb) 2009:6958-60. [DOI: 10.1039/b913922b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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77
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Chen ZW, Balamurugan A, Chen SM. Detection of DNA by using bio-conducting polymer-Nile blue composite electrode; Nile blue as an indicator. Bioelectrochemistry 2008; 75:13-8. [PMID: 19168399 DOI: 10.1016/j.bioelechem.2008.12.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 12/10/2008] [Accepted: 12/15/2008] [Indexed: 11/16/2022]
Abstract
The amplified electrochemical sensing of DNA was accomplished by electrodeposited PEDOT on the electrode surface and incorporation of Nile blue (NB) as redox active intercalator into DNA. Herein, above modified electrode called as PEDOT/DNA/NB composite electrode. PEDOT/DNA/NB composite electrode exhibited well defined redox peak at -0.35 V (Ag/AgCl) corresponding to NB. The composite electrode surface coverage (Gamma) and DeltaEp were compared with PEDOT/NB and DNA/NB modified electrode. Atomic Force microscopy (AFM), and cyclic voltammetry (CV) were used to characterize the PEDOT/DNA/NB composite electrode. The composite electrode was exhibited as surface confined redox process in neutral pH. The composite electrode was found to be pH dependent. The composite electrode exhibited catalytic property towards reduction of hydrogen peroxide (H(2)O(2)). The composite electrode was utilized to amperometric study and its response towards H(2)O(2) detection was less than 6 s and the detection limit was 0.1 microM. Moreover, we tested PEDOT/DNA/NB composite electrode to electrocatalytic reduction of cytochrome c (Cyt c).
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Affiliation(s)
- Zhi-Wei Chen
- Electroanalysis and Bioelectrochemistry lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road Taipei 106, Taiwan, ROC
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78
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Du Y, Li B, Wang F, Dong S. Au nanoparticles grafted sandwich platform used amplified small molecule electrochemical aptasensor. Biosens Bioelectron 2008; 24:1979-83. [PMID: 19101135 DOI: 10.1016/j.bios.2008.10.019] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2008] [Revised: 10/04/2008] [Accepted: 10/06/2008] [Indexed: 10/21/2022]
Abstract
We report a sensitively amplified electrochemical aptasensor using adenosine triphosphate (ATP) as a model. ATP is a multifunctional nucleotide that is most important as a "molecular currency" of intracellular energy transfer. In the sensing process, duplexes consisting of partly complementary strand (PCS1), ATP aptamer (ABA) and another partly complementary strand (PCS2) were immobilized onto Au electrode through the 5'-HS on the PCS1. Meanwhile, PCS2 was grafted with the Au nanoparticles (AuNPs) to amplify the detection signals. In the absence of ATP, probe methylene blue (MB) bound to the DNA duplexes and also bound to guanine bases specifically to produce a strong differential pulse voltammetry (DPV) signal. But when ATP exists, the ABA-PCS2 or ABA-PCS1 part duplexes might be destroyed, which decreased the amount of MB on the electrode and led to obviously decreased DPV signal. This phenomenon can be used to detect ATP and get a very sensitive detection limit low to 0.1nM, and the detection range could extend up to 10(-7)M. Compared to the sensing platform without PCS2 grafted AuNPs, amplified function of this sensing system was also evidently proved. Therefore, such PCS1-ABA-PCS2/AuNPs sensing system could provide a promising signal-amplified model for aptamer-based small-molecules detection.
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Affiliation(s)
- Yan Du
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, PR China
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79
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Lee JH, Wang Z, Liu J, Lu Y. Highly sensitive and selective colorimetric sensors for uranyl (UO2(2+)): development and comparison of labeled and label-free DNAzyme-gold nanoparticle systems. J Am Chem Soc 2008; 130:14217-26. [PMID: 18837498 PMCID: PMC2667950 DOI: 10.1021/ja803607z] [Citation(s) in RCA: 336] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Colorimetric uranium sensors based on uranyl (UO2(2+)) specific DNAzyme and gold nanoparticles (AuNP) have been developed and demonstrated using both labeled and label-free methods. In the labeled method, a uranyl-specific DNAzyme was attached to AuNP, forming purple aggregates. The presence of uranyl induced disassembly of the DNAzyme functionalized AuNP aggregates, resulting in red individual AuNPs. Once assembled, such a "turn-on" sensor is highly stable, works in a single step at room temperature, and has a detection limit of 50 nM after 30 min of reaction time. The label-free method, on the other hand, utilizes the different adsorption properties of single-stranded and double-stranded DNA on AuNPs, which affects the stability of AuNPs in the presence of NaCl. The presence of uranyl resulted in cleavage of substrate by DNAzyme, releasing a single stranded DNA that can be adsorbed on AuNPs and protect them from aggregation. Taking advantage of this phenomenon, a "turn-off" sensor was developed, which is easy to control through reaction quenching and has 1 nM detection limit after 6 min of reaction at room temperature. Both sensors have excellent selectivity over other metal ions and have detection limits below the maximum contamination level of 130 nM for UO2(2+) in drinking water defined by the U.S. Environmental Protection Agency (EPA). This study represents the first direct systematic comparison of these two types of sensor methods using the same DNAzyme and AuNPs, making it possible to reveal advantages, disadvantages, versatility, limitations, and potential applications of each method. The results obtained not only allow practical sensing application for uranyl but also serve as a guide for choosing different methods for designing colorimetric sensors for other targets.
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Affiliation(s)
- Jung Heon Lee
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana IL 61801
- Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign, Urbana IL 61801
| | - Zidong Wang
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana IL 61801
- Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign, Urbana IL 61801
| | - Juewen Liu
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana IL 61801
- Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign, Urbana IL 61801
| | - Yi Lu
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana IL 61801
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana IL 61801
- Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign, Urbana IL 61801
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80
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Zhang L, Sun H, Li D, Song S, Fan C, Wang S. A Conjugated Polymer-Based Electrochemical DNA Sensor: Design and Application of a Multi-Functional and Water-Soluble Conjugated Polymer. Macromol Rapid Commun 2008. [DOI: 10.1002/marc.200800260] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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81
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Zhang S, Zhong H, Ding C. Ultrasensitive flow injection chemiluminescence detection of DNA hybridization using signal DNA probe modified with Au and CuS nanoparticles. Anal Chem 2008; 80:7206-12. [PMID: 18759495 DOI: 10.1021/ac800847r] [Citation(s) in RCA: 160] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel and sensitive flow injection chemiluminescence assay for sequence-specific DNA detection based on signal amplification with nanoparticles (NPs) is reported in the present work. The "sandwich-type" DNA biosensor was fabricated with the thiol-functionalized capture DNA first immobilized on an Au electrode and hybridized with one end of target DNA, the other end of which was recognized with a signal DNA probe labeled with CuS NPs and Au NPs on the 3'- and 5'-terminus, respectively. The hybridization events were monitored by the CL intensity of luminol-H2O2-Cu(2+) after the cupric ions were dissolved from the hybrids. We demonstrated that the incorporation of Au NPs in this sensor design significantly enhanced the sensitivity and the selectivity because a single Au NP can be loaded with hundreds of signal DNA probe strands, which were modified with CuS NPs. The ratios of Au NPs, signal DNA probes, and CuS NPs modified on the gold electrode were approximately 1/101/103. A preconcentration process of cupric ions performed by anodic stripping voltammetry technology further increased the sensor performance. As a result of these two combined effects, this DNA sensor could detect as low as femtomolar target DNA and exhibited excellent selectivity against two-base mismatched DNA. Under the optimum conditions, the CL intensity was increased with the increase of the concentration of target DNA in the range of 2.0 x 10(-14)-2.0 x 10(-12) M. A detection limit of 4.8 x 10(-15) M target DNA was achieved.
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Affiliation(s)
- Shusheng Zhang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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82
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Mir M, Alvarez M, Azzaroni O, Tiefenauer L, Knoll W. Molecular architectures for electrocatalytic amplification of oligonucleotide hybridization. Anal Chem 2008; 80:6554-9. [PMID: 18652492 DOI: 10.1021/ac800560t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this work, we describe a new platform suitable for electrocatalytic amplification of oligonucleotide hybridization based on the use of supramolecular bioconjugates incorporating ferrocene-labeled streptavidin. Our goals were aimed at designing a biosensing platform which could support highly reproducible and stable electrocatalytic amplification with maximum efficiency. The use of nonlabeled streptavidin as an underlying layer promotes a major improvement on the characteristics of the amplified electrochemical signal. In addition, the electrocatalytic current can be easily amplified by tuning the concentration of electron donor species in solution. Because of the fact that the redox labels are bioconjugated to the DNA strands, increasing the ionic strength does not lead to the loss of redox labels. More importantly, increasing the concentration of donors only involves the magnification of the signal without implying the permeation of donors (thus reducing the efficient electrocatalysis). This approach represents a major improvement on the use of electrocatalytically amplified DNA-sensing platforms, thus overcoming any possible limitation in connection with the reproducibility and reliability of this well-established method.
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Affiliation(s)
- Mònica Mir
- Max-Planck-Institut fur Polymerforschung, Ackermannweg 10 (55128) Mainz, Germany
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Abstract
The concept of DNA biosensors is sustained by the need for rapid and highly sensitive analytical tools for genetic detection. Their implementation is based on three key steps: (i) immobilization of single-stranded oligonucleotide probes onto a substrate; (ii) hybridization and (iii) reading. These steps involve complementary knowledge in various disciplinary fields such as surface physics and chemistry, molecular electrochemistry, micro-technologies, optics, electronics and biochemistry. We present here, in a non-exhaustive way, the recent advances in the two steps of immobilization and detection that rely upon increasing integration of the number of reading points or/and of the reading strategy.
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Affiliation(s)
- Serge Cosnier
- Département de Chimie Moléculaire, UMR-5250, ICMG FR-2607, CNRS, Université Joseph Fourier BP 53, 38041 Grenoble Cédex 9, France.
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Cahová H, Havran L, Brázdilová P, Pivonková H, Pohl R, Fojta M, Hocek M. Aminophenyl- and nitrophenyl-labeled nucleoside triphosphates: synthesis, enzymatic incorporation, and electrochemical detection. Angew Chem Int Ed Engl 2008; 47:2059-62. [PMID: 18260080 DOI: 10.1002/anie.200705088] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hana Cahová
- Institute of Organic Chemistry and Biochemistry, v.v.i. Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nam. 2, 16610 Prague 6, Czech Republic
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85
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Cahová H, Havran L, Brázdilová P, Pivoňková H, Pohl R, Fojta M, Hocek M. Aminophenyl- and Nitrophenyl-Labeled Nucleoside Triphosphates: Synthesis, Enzymatic Incorporation, and Electrochemical Detection. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200705088] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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