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KARASAKAL A, YALÇIN GÜRKAN Y, PARLAR S. Candidate drug molecule-DNA interaction and molecular modelling of candidate drug molecule. JOURNAL OF HEALTH SCIENCES AND MEDICINE 2022. [DOI: 10.32322/jhsm.1117781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Aim: 1,4-dihydropyridine derivative, 1-(3-phenyl propyl)-4-(2-(2-hydroxybenzylidene) hydrazone)-1,4-dihydropyridine (abbreviated as DHP) was synthesized as potential agent for Alzheimer’s disease which is a progressive neurodegenerative brain disorder affecting millions of elderly people. With this study, the electrochemical properties of DHP were investigated and its interaction with DNA was analyzed by differential pulse voltammetry (DPV) and cyclic voltammetry (CV) measurements. In addition, this study aims to determine degradation mechanism of the DHP molecule by Density-functional theory (DFT) in gas and in aqueous phase.
Material and Method: Experimental conditions such as immobilization time, the effect of the scan rate, concentration, and the effect of pH were optimized. The method was validated according to validation parameters such as range, precision, linearity, limit of detection (LOD), limit of quantitation (LOQ) and inter/intraday.
Results: Linearity study for the calibration curve of DNA and DHP with DPV was calculated in the calibration range 10-100 µg/mL. The LOD and LOQ values were calculated as 3 and 10 µg/mL and intra-day and inter-day repeatability (RSD %) were 1.85 and 3.64 µg/mL, respectively. After the DHP-DNA interaction, the oxidation currents of guanine decreased as a proof of interaction. The activation energy of the most possible path of reaction was calculated, and their thermodynamically most stable state was determined in gas phase.
Conclusion: We developed to improve a sensitive, fast and easy detection process for determination of interaction between DHP and DNA.
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Topkaya SN, Karasakal A, Cetin AE, Parlar S, Alptüzün V. Electrochemical Characteristics of a Novel Pyridinium Salt as a Candidate Drug Molecule and Its Interaction with DNA. ELECTROANAL 2020. [DOI: 10.1002/elan.202000012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Seda Nur Topkaya
- Department of Analytical ChemistryFaculty of PharmacyIzmir Katip Celebi University Izmir Turkey
| | - Ayça Karasakal
- Department of ChemistryFaculty of Science and LettersNamık Kemal University Tekirdag Turkey
| | | | - Sülünay Parlar
- Department of Pharmaceutical ChemistryFaculty of PharmacyEge University Izmir Turkey
| | - Vildan Alptüzün
- Department of Pharmaceutical ChemistryFaculty of PharmacyEge University Izmir Turkey
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Kerekovic I, Wittine K. Properties of gold electrode modified with dimercaptosuccinic acid and electrochemical behavior of copper histidine complex. JOURNAL OF ANALYTICAL CHEMISTRY 2016. [DOI: 10.1134/s1061934816030047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Černocká H, Ostatná V, Paleček E. Protein structural transition at negatively charged electrode surfaces. Effects of temperature and current density. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.06.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Kerekovic I, Milardovic S, Palcic M, Grabaric Z. Characterization of cysteamine self assembled on gold functionalized with nitrilotriacetic acid and evaluation of copper(II) binding capacity with adsorption transfer stripping voltammetry. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.04.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ye BX, Wang CH, Jing AH. Interaction of the Anticancer Drug 8-Azaguanine with DNA. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200300072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Johnson RP, Gale N, Richardson JA, Brown T, Bartlett PN. Denaturation of dsDNA immobilised at a negatively charged gold electrode is not caused by electrostatic repulsion. Chem Sci 2013. [DOI: 10.1039/c3sc22147d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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The effect of base-pair sequence on electrochemically driven denaturation. Bioelectrochemistry 2012; 85:7-13. [DOI: 10.1016/j.bioelechem.2011.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 11/17/2011] [Accepted: 11/18/2011] [Indexed: 11/18/2022]
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Affiliation(s)
- Emil Paleček
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612
65 Brno, Czech Republic
| | - Martin Bartošík
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612
65 Brno, Czech Republic
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Paleček E, Bartošík M, Ostatná V, Trefulka M. Electrocatalysis in proteins, nucleic acids and carbohydrates. CHEM REC 2012; 12:27-45. [DOI: 10.1002/tcr.201100029] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Indexed: 11/06/2022]
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Bartošík M, Paleček E. Square Wave Stripping Voltammetry of Unlabeled Single- and Double-Stranded DNAs. ELECTROANAL 2011. [DOI: 10.1002/elan.201100079] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Paleček E, Ostatná V, Černocká H, Joerger AC, Fersht AR. Electrocatalytic Monitoring of Metal Binding and Mutation-Induced Conformational Changes in p53 at Picomole Level. J Am Chem Soc 2011; 133:7190-6. [DOI: 10.1021/ja201006s] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Emil Paleček
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, 612 65 Brno, Czech Republic
| | - Veronika Ostatná
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, 612 65 Brno, Czech Republic
| | - Hana Černocká
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, 612 65 Brno, Czech Republic
| | | | - Alan R. Fersht
- MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, U.K
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Živanović M, Aleksić M, Ostatná V, Doneux T, Paleček E. Polylysine-Catalyzed Hydrogen Evolution at Mercury Electrodes. ELECTROANAL 2010. [DOI: 10.1002/elan.201000088] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Aladag N, Trnkova L, Kourilova A, Ozsoz M, Jelen F. Voltammetric Study of Aminopurines on Pencil Graphite Electrode in the Presence of Copper Ions. ELECTROANAL 2010. [DOI: 10.1002/elan.201000031] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Paleček E, Heyrovský M, Janík B, Kaláb D, Pechan Z. From DC polarographic presodium wave of proteins to electrochemistry of biomacromolecules. ACTA ACUST UNITED AC 2010. [DOI: 10.1135/cccc2009511] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
History of electrochemistry of proteins and nucleic acids is briefly reviewed. The ability of proteins to catalyze hydrogen evolution at Hg electrodes was discovered almost 80 years ago in J. Heyrovský’s laboratory. This phenomenon was not sufficiently appreciated for several decades. Recently it has been shown that using constant current chronopotentiometric stripping (CPS) with hanging mercury drop, solid amalgam or Hg-film electrodes the CPS peak H is obtained with nanomolar concentrations of peptides and proteins. This peak is derived from the presodium wave but it has some new properties useful in protein research. It is sensitive to changes in protein structures and to protein redox states, representing a new tool for protein analysis applicable in biomedicine. Electroactivity of nucleic acids was discovered about 50 years ago. Electrochemistry of DNA and RNA is now a booming field because of its potential use in sensors for DNA hybridization and DNA damage. Quite recently it has been shown that electrochemistry can be applied also in polysaccharide analysis. A review with 99 references.
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Ioannou A, Alexiadou D, Kouidou S, Girousi S, Voulgaropoulos A. Use of Adsorptive Transfer Stripping Voltammetry for Analyzing Variations of Cytosine Methylation in DNA. ELECTROANAL 2009. [DOI: 10.1002/elan.200900274] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Bartosík M, Ostatná V, Palecek E. Electrochemistry of riboflavin-binding protein and its interaction with riboflavin. Bioelectrochemistry 2009; 76:70-5. [PMID: 19446502 DOI: 10.1016/j.bioelechem.2009.04.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 04/16/2009] [Accepted: 04/20/2009] [Indexed: 10/20/2022]
Abstract
Riboflavin-binding protein (RBP, a carrier of riboflavin) plays an essential role in embryo development. Electrochemical studies of the riboflavin-RBP interactions have been so far limited to changes in polarographic and voltammetric responses of riboflavin because of lack of methods capable to detect electrochemical changes in the RBP responses. Here we used constant current chronopotentiometric stripping analysis (CPSA) with the hanging mercury drop electrode (HMDE) and square wave voltammetry (SWV) with carbon paste electrode (CPE) to investigate RBP. We found that CPSA of RBP produces electrocatalytic peak H, capable to discriminate between apoprotein and holoprotein forms of RBP. This peak is suitable for studies of RBP-riboflavin interaction at nanomolar concentrations. We observed no sign of a release of riboflavin from holoprotein adsorbed at the HMDE surface. SWV at CPE required higher concentrations of RBP and displayed almost identical oxidation peaks of apoprotein and holoprotein.
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Affiliation(s)
- Martin Bartosík
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, 612 65 Brno, Czech Republic
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Paleček E, Ostatná V. Ionic strength-dependent structural transition of proteins at electrode surfaces. Chem Commun (Camb) 2009:1685-7. [DOI: 10.1039/b822274f] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Paleček E, Ostatná V. Potential-dependent surface denaturation of BSA in acid media. Analyst 2009; 134:2076-80. [DOI: 10.1039/b912602c] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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22
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Jelen F, Olejniczak AB, Kourilova A, Lesnikowski ZJ, Palecek E. Electrochemical DNA Detection Based on the Polyhedral Boron Cluster Label. Anal Chem 2008; 81:840-4. [DOI: 10.1021/ac801235b] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Frantisek Jelen
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-612 65 Brno, Czech Republic, and Institute of Medical Biology, Polish Academy of Sciences, Laboratory of Molecular Virology & Biological Chemistry, 106 Lodowa Street, PL-93232 Lodz, Poland
| | - Agnieszka B. Olejniczak
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-612 65 Brno, Czech Republic, and Institute of Medical Biology, Polish Academy of Sciences, Laboratory of Molecular Virology & Biological Chemistry, 106 Lodowa Street, PL-93232 Lodz, Poland
| | - Alena Kourilova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-612 65 Brno, Czech Republic, and Institute of Medical Biology, Polish Academy of Sciences, Laboratory of Molecular Virology & Biological Chemistry, 106 Lodowa Street, PL-93232 Lodz, Poland
| | - Zbigniew J. Lesnikowski
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-612 65 Brno, Czech Republic, and Institute of Medical Biology, Polish Academy of Sciences, Laboratory of Molecular Virology & Biological Chemistry, 106 Lodowa Street, PL-93232 Lodz, Poland
| | - Emil Palecek
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, CZ-612 65 Brno, Czech Republic, and Institute of Medical Biology, Polish Academy of Sciences, Laboratory of Molecular Virology & Biological Chemistry, 106 Lodowa Street, PL-93232 Lodz, Poland
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Paleček E, Ostatná V, Masařík M, Bertoncini CW, Jovin TM. Changes in interfacial properties of α-synuclein preceding its aggregation. Analyst 2008; 133:76-84. [DOI: 10.1039/b712812f] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Paleček E, Ostatná V. Electroactivity of Nonconjugated Proteins and Peptides. Towards Electroanalysis of All Proteins. ELECTROANAL 2007. [DOI: 10.1002/elan.200704033] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Spectrometric and Voltammetric Analysis of Urease – Nickel Nanoelectrode as an Electrochemical Sensor. SENSORS 2007. [DOI: 10.3390/s7071238] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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26
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Trefulka M, Ostatná V, Havran L, Fojta M, Paleček E. Covalent Labeling of Nucleosides with VIII- and VI-Valent Osmium Complexes. ELECTROANAL 2007. [DOI: 10.1002/elan.200703848] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Native and denatured bovine serum albumin. D.c. polarography, stripping voltammetry and constant current chronopotentiometry. J Electroanal Chem (Lausanne) 2006. [DOI: 10.1016/j.jelechem.2006.03.037] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Adam V, Petrlova J, Potesil D, Zehnalek J, Sures B, Trnkova L, Jelen F, Kizek R. Study of Metallothionein Modified Electrode Surface Behavior in the Presence of Heavy Metal Ions-Biosensor. ELECTROANAL 2005. [DOI: 10.1002/elan.200403264] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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de Castro CSP, Souzade JR, Júnior CB. The binding of zinc (II) to a double-stranded oligodeoxyribonucleotide. A voltammetric study. Biophys Chem 2005; 112:59-67. [PMID: 15501576 DOI: 10.1016/j.bpc.2004.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2004] [Revised: 06/29/2004] [Accepted: 07/02/2004] [Indexed: 11/28/2022]
Abstract
Binding of zinc to a 19 mer double-stranded oligodeoxyribonucleotide was investigated by anodic stripping voltammetry and cyclic voltammetry in order to understand the roles of zinc in DNA cleavage catalyzed by mung bean nuclease. These methods rely on the direct monitoring of zinc oxidation current in the absence and in the presence of the oligo. Zinc titration curves with the ds-oligodeoxyribonucleotide were obtained in concentrations ranging from 3.62 x 10(-9) to 3.62 x 10(-8) M and 4.06 x 10(-10) to 5.25 x 10(-9) M. The acquired data were used to determine the dissociation constant, stoichiometry and zinc binding sites of the complex and to understand the specific changes of ds-oligodeoxyribonucleotide secondary structure by zinc binding. The oxidation-reduction process of zinc was also investigated by cyclic voltammetry through I (oxidation current) versus v(1/2) (square root of scan rate) curves in the absence and in the presence of the double-stranded oligodeoxyribonucleotide.
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Affiliation(s)
- C S Pires de Castro
- Laboratório de Espectrometria de Massa, Embrapa Recursos Genéticos e Biotecnologia, P.O. Box 02372, 70.770-900 Brasília-DF, Brazil.
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Phytochelatin Modified Electrode Surface as a Sensitive Heavy- Metal Ion Biosensor. SENSORS 2005. [DOI: 10.3390/s5010070] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fojta M. Mercury Electrodes in Nucleic Acid Electrochemistry: Sensitive Analytical Tools and Probes of DNA Structure. A Review. ACTA ACUST UNITED AC 2004. [DOI: 10.1135/cccc20040715] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This review is devoted to applications of mercury electrodes in the electrochemical analysis of nucleic acids and in studies of DNA structure and interactions. At the mercury electrodes, nucleic acids yield faradaic signals due to redox processes involving adenine, cytosine and guanine residues, and tensammetric signals due to adsorption/desorption of polynucleotide chains at the electrode surface. Some of these signals are highly sensitive to DNA structure, providing information about conformation changes of the DNA double helix, formation of DNA strand breaks as well as covalent or non-covalent DNA interactions with small molecules (including genotoxic agents, drugs, etc.). Measurements at mercury electrodes allow for determination of small quantities of unmodified or electrochemically labeled nucleic acids. DNA-modified mercury electrodes have been used as biodetectors for DNA damaging agents or as detection electrodes in DNA hybridization assays. Mercury film and solid amalgam electrodes possess similar features in the nucleic acid analysis to mercury drop electrodes. On the contrary, intrinsic (label-free) DNA electrochemical responses at other (non-mercury) solid electrodes cannot provide information about small changes of the DNA structure. A review with 188 references.
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Hason S. Interaction of DNA with echinomycin at the mercury electrode surface as detected by impedance and chronopotentiometric measurements. Talanta 2002; 56:905-13. [DOI: 10.1016/s0039-9140(01)00664-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2001] [Revised: 09/14/2001] [Accepted: 09/26/2001] [Indexed: 11/17/2022]
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Jelen F, Erdem A, Palecek E. Cyclic voltammetry of echinomycin and its interaction with double-stranded and single-stranded DNA adsorbed at the electrode. Bioelectrochemistry 2002; 55:165-7. [PMID: 11786366 DOI: 10.1016/s1567-5394(01)00143-8] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Interactions of echinomycin (Echi) with DNA was studied by cyclic voltammetry (CV) with hanging mercury drop electrode (HMDE). Echinomycin was electrochemically active, yielding several signals. Interaction of Echi with dsDNA attached to a hanging mercury drop electrode resulted in high Echi signals, suggesting a strong binding of Echi to dsDNA by bis-intercalation at the electrode surface. Under the same conditions, interaction of Echi with ssDNA produced almost no Echi signal. This behavior is in agreement with a strong binding of Echi to dsDNA and a very weak binding of Echi to ssDNA observed earlier in solution. Echi, thus, appears to be a good candidate for redox indicator in electrochemical DNA hybridization sensors.
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Affiliation(s)
- Frantisek Jelen
- Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic.
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Wang Z, Liu D, Dong S. In-situ FTIR study on adsorption and oxidation of native and thermally denatured calf thymus DNA at glassy carbon electrodes. Biophys Chem 2001; 89:87-94. [PMID: 11246748 DOI: 10.1016/s0301-4622(00)00217-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In-situ Fourier transform infra-red (FTIR) spectra of native and thermally denatured calf thymus DNA (CT DNA) adsorbed and/or oxidized at a glassy carbon (GC) electrode surface are reported. The adsorption of native DNA occurs throughout the potential range (- 0.2 approximately 1.3 V) studied, and the adsorbing state of DNA at electrode surface is changed from through the C=O band of bases and pyrimidine rings to through the C=O of cytosine and imidazole rings while the potential shifts negatively from 1.3 V to -0.2 V. An in-situ FTIR spectrum of native CT DNA adsorbed at GC electrode surface is similar to that of the dissolved DNA, indicating that the structure of CT DNA is not distorted while it is adsorbed at the GC electrode surface. In the potential range of -0.2 approximately1.30 V, the temperature-denatured CT DNA is adsorbed at the electrode surface first, then undergoes electrochemical oxidation reaction and following that, diffuses away from the electrode surface.
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Affiliation(s)
- Z Wang
- Laboratory of Electroanalytical Chemistry and National Analytical and Research Center of Electrochemistry and Spectroscopy, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
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Electrochemistry of DNA. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0069-8040(99)80008-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Fojta M, Bowater RP, Stanková V, Havran L, Lilley DM, Palecek E. Two superhelix density-dependent DNA transitions detected by changes in DNA adsorption/desorption behavior. Biochemistry 1998; 37:4853-62. [PMID: 9538002 DOI: 10.1021/bi9729559] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The adsorption behavior of covalently closed circular plasmid DNA at the mercury/water interface was studied by means of AC impedance measurements. The dependence of the differential capacitance (C) of the electrode double layer on the potential (E) was measured in the presence of adsorbed DNA. It was found that the C-E curves of supercoiled DNA at native and highly negative superhelix densities (sigma), relaxed covalently closed circular DNA, and nicked DNA differed from each other. A detailed study of topoisomer distributions ranging from -sigma of 0 to 0.11 revealed two supercoiling-dependent transitions, at about -sigma = 0.04 (transition TI) and 0.07 (transition TII). Transition TI was detected by measuring the height of the adsorption/desorption peak 1 (at about -1.2 V against the saturated calomel electrode) and the decrease of capacitance (DeltaC) at -0.35 V. This transition may be due to a sudden change in the ability of the DNA to respond to the alternating voltage, probably caused by changes in the DNA tertiary and/or secondary structure. Transition TII was detected by measuring peak 3* (at about -1.3 V), which was absent in topoisomers with -sigma less than 0.05. This transition is due to changes in the DNA adsorption/desorption behavior related to increased accessibility of bases at elevated negative superhelix density. Opening of the duplex at highly negative superhelix density was also detected by the single-strand selective probe of DNA structure, osmium tetroxide, 2, 2'-bipyridine. Our results suggest that electrochemical techniques provide sensitive experimental analysis of changes in DNA structure.
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Affiliation(s)
- M Fojta
- Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic
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Paleček E, Tomschik M, Staňková V, Havran L. Chronopotentiometric stripping of DNA at mercury electrodes. ELECTROANAL 1997. [DOI: 10.1002/elan.1140091305] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Fojta M, Paleček E. Supercoiled DNA-modified mercury electrode: A highly sensitive tool for the detection of DNA damage. Anal Chim Acta 1997. [DOI: 10.1016/s0003-2670(96)00551-x] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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