1
|
Yenice C, Chahin N, Jauset-Rubio M, Hall M, Biggs P, Dimai HP, Obermayer-Pietsch B, Ortiz M, O’Sullivan CK. Semiautomated Electrochemical Melting Curve Analysis Device for the Detection of an Osteoporosis Associated Single Nucleotide Polymorphism in Blood. Anal Chem 2023; 95:14192-14202. [PMID: 37713191 PMCID: PMC10534999 DOI: 10.1021/acs.analchem.3c01668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/31/2023] [Indexed: 09/16/2023]
Abstract
The detection of single nucleotide polymorphisms (SNPs) is of increasing importance in many areas including clinical diagnostics, patient stratification for pharmacogenomics, and advanced forensic analysis. In the work reported, we apply a semiautomated system for solid-phase electrochemical melting curve analysis (éMCA) for the identification of the allele present at a specific SNP site associated with an increased risk of bone fracture and predisposition to osteoporosis. Asymmetric isothermal recombinase polymerase amplification using ferrocene labeled forward primers was employed to generate single stranded redox labeled amplicons. In a first approach to demonstrate the proof of concept of combining asymmetric RPA with solid-phase éMCA, a simplified system housing a multielectrode array within a polymeric microsystem, sandwiched between two aluminum plates of a heater device, was used. Sample manipulation through the microfluidic channel was controlled by a syringe pump, and an external Ag/AgCl reference electrode was employed. Individual electrodes of the array were functionalized with four different oligonucleotide probes, each probe equivalent in design with the exception of the middle nucleotide. The isothermally generated amplicons were allowed to hybridize to the surface-tethered probes and subsequently subjected to a controlled temperature ramp, and the melting of the duplex was monitored electrochemically. A clear difference between the fully complementary and a single mismatch was observed. Having demonstrated the proof-of-concept, a device for automated éMCA with increased flexibility to house diverse electrode arrays with internal quasi-gold reference electrodes, higher resolution, and broader melting temperature range was developed and exploited for the detection of SNP hetero/homozygosity. Using the optimized conditions, the system was applied to the identification of the allele present at an osteoporosis associated SNP site, rs2741856, in 10 real fingerprick/venous blood samples, with results validated using Sanger sequencing.
Collapse
Affiliation(s)
- Cansu
Pinar Yenice
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Nassif Chahin
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Miriam Jauset-Rubio
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Matthew Hall
- Labman
Automation Ltd., Seamer Hill, Stokesley, North Yorkshire TS9 5NQ, U.K.
| | - Phil Biggs
- Labman
Automation Ltd., Seamer Hill, Stokesley, North Yorkshire TS9 5NQ, U.K.
| | - Hans-Peter Dimai
- Division
of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Barbara Obermayer-Pietsch
- Division
of Endocrinology and Diabetology, Department of Internal Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Mayreli Ortiz
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Ciara K. O’Sullivan
- INTERFIBIO
Research Group, Departament d’Enginyeria Química, Universitat Rovira i Virgili, 43007 Tarragona, Spain
- Institució
Catalana de Recerca i Estudis Avancats (ICREA), 08010 Barcelona, Spain
| |
Collapse
|
2
|
Chahin N, Escobar-Nassar S, Osma J, Bashammakh AS, AlYoubi AO, Ortiz M, O’Sullivan CK. Low-Cost Platform for Multiplexed Electrochemical Melting Curve Analysis. ACS MEASUREMENT SCIENCE AU 2022; 2:147-156. [PMID: 35479100 PMCID: PMC9031717 DOI: 10.1021/acsmeasuresciau.1c00044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/15/2021] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Detection and identification of single nucleotide polymorphisms (SNPs) have garnered increasing interest in the past decade, finding potential application in detection of antibiotic resistance, advanced forensic science, as well as clinical diagnostics and prognostics, moving toward the realization of personalized medicine. Many different techniques have been developed for genotyping SNPs, and ideally these techniques should be rapid, easy-to-use, cost-effective, flexible, scalable, easily automated, and requiring minimal end-user intervention. While high-resolution melting curve analysis has been widely used for the detection of SNPs, fluorescence detection does not meet many of the desired requirements, and electrochemical detection is an attractive alternative due to its high sensitivity, simplicity, cost-effectiveness, and compatibility with microfabrication. Herein, we describe the multiplexed electrochemical melting curve analysis of duplex surfaces tethered to electrodes of an array. In this approach, thiolated probes designed to hybridize to a DNA sequence containing the SNP to be interrogated are immobilized on gold electrodes. Asymmetric PCR using a ferrocene-labeled forward primer is used to generate this single-stranded redox-labeled PCR amplicon. Following hybridization with the probe immobilized on the electrode surface, the electrode array is exposed to a controlled ramping of temperature, with concomitant constant washing of the electrode array surface while simultaneously carrying out voltammetric measurements. The optimum position of the site complementary to the SNP site in the immobilized probe to achieve maximum differentiation in melting temperature between wild-type and single base mismatch, thus facilitating allelic discrimination, was determined and applied to the detection of a cardiomyopathy associated SNP.
Collapse
Affiliation(s)
- Nassif Chahin
- Departament
d’Enginyeria Química, Universitat
Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
| | - Santiago Escobar-Nassar
- Department
of Electrical and Electronics Engineering, Universidad de los Andes, Cra. 1E No. 19a-40, Bogotá, DC 111711, Colombia
| | - Johann Osma
- Department
of Electrical and Electronics Engineering, Universidad de los Andes, Cra. 1E No. 19a-40, Bogotá, DC 111711, Colombia
| | - Abdulaziz S. Bashammakh
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, 21589 Jeddah, Kingdom of Saudi
Arabia
| | - Abdulrahman O. AlYoubi
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, 21589 Jeddah, Kingdom of Saudi
Arabia
| | - Mayreli Ortiz
- Departament
d’Enginyeria Química, Universitat
Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
| | - Ciara K. O’Sullivan
- Departament
d’Enginyeria Química, Universitat
Rovira i Virgili, Avinguda Països Catalans 26, 43007 Tarragona, Spain
- ICREA, Passeig Lluis Companys 23, 08010 Barcelona, Spain
| |
Collapse
|
3
|
DNA adsorption on Pt studied by Modulation of the Interfacial Capacitance. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2016.12.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
4
|
Kurbanoglu S, Dogan-Topal B, Rodriguez EP, Bozal-Palabiyik B, Ozkan SA, Uslu B. Advances in electrochemical DNA biosensors and their interaction mechanism with pharmaceuticals. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.05.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
5
|
Ribeiro WC, Gonçalves LM, Liébana S, Pividori MI, Bueno PR. Molecular conductance of double-stranded DNA evaluated by electrochemical capacitance spectroscopy. NANOSCALE 2016; 8:8931-8938. [PMID: 27074378 DOI: 10.1039/c6nr01076h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Conductance was measured in two different double stranded DNA (both with 20 bases), the more conducting poly(dG)-poly(dC) (ds-DNAc) and the less conducting poly(dA)-poly(dT) (ds-DNAi), by means of Electrochemical Capacitance Spectroscopy (ECS). The use of the ECS approach, exemplified herein with DNA nanowires, is equally a suitable and time-dependent advantageous alternative for conductance measurement of molecular systems, additionally allowing better understanding of the alignment existing between molecular scale conductance and electron transfer rate.
Collapse
Affiliation(s)
- W C Ribeiro
- Instituto de Química, Universidade Estadual Paulista, (Nanobionics Research Group), CP 355, 14800-900, Araraquara, SP, Brazil
| | - L M Gonçalves
- Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - S Liébana
- Grup de Sensors & Biosensors, Unitat de Química Analítica, Bloc de Ciencias e Biociencias, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - M I Pividori
- Grup de Sensors & Biosensors, Unitat de Química Analítica, Bloc de Ciencias e Biociencias, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - P R Bueno
- Instituto de Química, Universidade Estadual Paulista, (Nanobionics Research Group), CP 355, 14800-900, Araraquara, SP, Brazil
| |
Collapse
|
6
|
Fang X, Zhang H, Zhang F, Jing F, Mao H, Jin Q, Zhao J. Real-time monitoring of strand-displacement DNA amplification by a contactless electrochemical microsystem using interdigitated electrodes. LAB ON A CHIP 2012; 12:3190-3196. [PMID: 22773155 DOI: 10.1039/c2lc40384f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This paper reports the design and implementation of a contactless conductivity detection system which combines a thermal control cell, a data processing system and an electrochemical (EC) cell for label-free isothermal nucleic acid amplification and real-time monitoring. The EC cell consists of a microchamber and interdigitated electrodes as the contactless conductivity biosensor with a cover slip as insulation. In our work, contactless EC measurements, the effects of trehalose on amplification, and chip surface treatment are investigated. With the superior performance of the biosensor, the device can detect the amount of pure DNA at concentrations less than 0.1 pg μl(-1). The EC cell, integrated with a heater and a temperature sensor, has successfully implemented nicking-based strand-displacement amplification at an initial concentration of 2.5 μM and the yields are monitored directly (dismissing the use of probes or labels) on-line. This contactless detector carries important advantages: high anti-interference capability, long detector life, high reusability and low cost. In addition, the small size, low power consumption and portability of the detection cell give the system the potential to be highly integrated for use in field service and point of care applications.
Collapse
Affiliation(s)
- Xinxin Fang
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Science, China
| | | | | | | | | | | | | |
Collapse
|
7
|
DNA-functionalized biosensor for riboflavin based electrochemical interaction on pretreated pencil graphite electrode. Biosens Bioelectron 2012; 31:376-81. [DOI: 10.1016/j.bios.2011.10.050] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 10/18/2011] [Accepted: 10/25/2011] [Indexed: 11/23/2022]
|
8
|
Raoof JB, Ojani R, Ebrahimi M, Hamidi-Asl E. Developing a Nano-Biosensor for DNA Hybridization Using a New Electroactive Label. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201180427] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
9
|
Guo XX, Song ZJ, Sun JJ, Song JF. Interaction of calf thymus dsDNA with anti-tumor drug tamoxifen studied by zero current potentiometry. Biosens Bioelectron 2011; 26:4001-5. [DOI: 10.1016/j.bios.2011.03.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 03/11/2011] [Accepted: 03/15/2011] [Indexed: 02/01/2023]
|
10
|
Adsorption of cetyltrimethylammonium bromide and cetyldimethylbenzylammonium chloride on a hanging mercury electrode studied by adsorptive transfer stripping voltammetry. J Colloid Interface Sci 2011; 354:275-81. [DOI: 10.1016/j.jcis.2010.09.079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 09/07/2010] [Accepted: 09/24/2010] [Indexed: 11/22/2022]
|
11
|
Carbon nanotubes/(pLys/dsDNA) n layer-by-layer multilayer films for electrochemical studies of DNA damage. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1059-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
12
|
Brilliant cresyl blue as electroactive indicator in electrochemical DNA oligonucleotide sensors. Bioelectrochemistry 2009; 78:141-6. [PMID: 19793685 DOI: 10.1016/j.bioelechem.2009.09.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 09/08/2009] [Accepted: 09/08/2009] [Indexed: 11/23/2022]
Abstract
A new electrochemical DNA biosensor is presented based on carbon past electrode (CPE) for immobilization and detection of short DNA sequences with brilliant cresyl blue (BCB) as electroactive label. The interaction of BCB with DNA is electrochemically detected and BCB displays different signals in the interaction to ssDNA and dsDNA and variation in the BCB signal represents the extent of hybridization at the electrode surface. The effect of solution pH on electrochemical behavior of BCB was investigated. Additionally, the effect of solution pH on BCB accumulation on the CPE was studied. Furthermore, experiments showed that the solution pH could influence the differential pulse voltammetry (DPV) signal of BCB accumulated on the electrode and the highest BCB signal was obtained in pH 7.00. The effect of electrochemical pretreatment of CPE on the ability of electrode in probe adsorption, BCB accumulation and conditions of probe immobilization including potential and time was investigated and optimum conditions were suggested. The peak currents of BCB were linearly related to the concentration of the target oligonucleotide sequence in the range of 1.0x10(-8) to 5.0x10(-6)M. The detection limit of this approach was 9.00nM. The selectivity of the biosensor was studied using noncomplementary oligonucleotide.
Collapse
|
13
|
Electrochemical DNA hybridization assay for the FMV 35S gene sequence using PbS nanoparticles as a label. Mikrochim Acta 2008. [DOI: 10.1007/s00604-008-0116-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
14
|
Hybridization biosensor using 2-nitroacridone as electrochemical indicator for detection of short DNA species of Chronic Myelogenous Leukemia. Biosens Bioelectron 2008; 24:349-55. [DOI: 10.1016/j.bios.2008.04.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2008] [Revised: 03/21/2008] [Accepted: 04/03/2008] [Indexed: 11/23/2022]
|
15
|
Lisdat F, Schäfer D. The use of electrochemical impedance spectroscopy for biosensing. Anal Bioanal Chem 2008; 391:1555-67. [PMID: 18414837 DOI: 10.1007/s00216-008-1970-7] [Citation(s) in RCA: 439] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Revised: 02/08/2008] [Accepted: 02/09/2008] [Indexed: 11/30/2022]
Abstract
This review introduces the basic concepts and terms associated with impedance and techniques of measuring impedance. The focus of this review is on the application of this transduction method for sensing purposes. Examples of its use in combination with enzymes, antibodies, DNA and with cells will be described. Important fields of application include immune and nucleic acid analysis. Special attention is devoted to the various electrode design and amplification schemes developed for sensitivity enhancement. Electrolyte insulator semiconductor (EIS) structures will be treated separately.
Collapse
Affiliation(s)
- F Lisdat
- Biosystems Technology, Wildau University of Applied Sciences, 15745, Wildau, Germany.
| | | |
Collapse
|
16
|
Hybridization biosensor using sodium tanshinone IIA sulfonate as electrochemical indicator for detection of short DNA species of chronic myelogenous leukemia. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.08.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
17
|
Pänke O, Balkenhohl T, Kafka J, Schäfer D, Lisdat F. Impedance spectroscopy and biosensing. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2008; 109:195-237. [PMID: 17992488 DOI: 10.1007/10_2007_081] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This chapter introduces the basic terms of impedance and the technique of impedance measurements. Furthermore, an overview of the application of this transduction method for analytical purposes will be given. Examples for combination with enzymes, antibodies, DNA but also for the analysis of living cells will be described. Special attention is devoted to the different electrode design and amplification schemes developed for sensitivity enhancement. Finally, the last two sections will show examples from the label-free determination of DNA and the sensorial detection of autoantibodies involved in celiac disease.
Collapse
Affiliation(s)
- O Pänke
- Biosystems Technology, Wildau University of Applied Sciences, Bahnhofstrasse 1, 15745 Wildau, Germany
| | | | | | | | | |
Collapse
|
18
|
Mir M, Katakis I. Target label-free, reagentless electrochemical DNA biosensor based on sub-optimum displacement. Talanta 2007; 75:432-41. [PMID: 18371903 DOI: 10.1016/j.talanta.2007.11.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Revised: 11/05/2007] [Accepted: 11/08/2007] [Indexed: 10/22/2022]
Abstract
One of the most time consuming and complex steps in the detection of DNA target with a biosensor is the previous labeling of the target. In this paper, a novel target label-free, reagentless and easy to use DNA biosensor is reported. Electrochemical transduction (cyclic voltammetry, differential pulse voltammetry and impedance spectroscopy) and optical red out by surface plasmon resonance were chosen for the platform optimization. This target label-free DNA detection method is based on displacement of sub-optimum labeled oligonucleotide. This strategy requires the pre-hybridization of the capture probe immobilized on the electrode surface with a sub-optimum mutated oligonucleotide pre-labeled with an electrochemically active ferrocene moiety. Due to the higher affinity of the target that is fully complementary to the capture probe, the sub-optimum ferrocene-labeled sequence is displaced when the fully complementary target is introduced into the system. The decrease of the electrochemical signal from the ferrocene verifies the presence of the target, which is proportional to the target concentration. A variation of this strategy was employed to enhance the ferrocene signal. A diffusional mediator, ferrocyanide, was introduced in the system to help in this purpose. This platform attains a stable, specific and reproducible response (5-15%), with a detection limit in the range of microM. This electrochemical sensor is the first example of this kind of sensor to detect cystic fibrosis, however, this configuration could be generically applied to any application where the detection of a DNA target is involved.
Collapse
Affiliation(s)
- Mònica Mir
- Bioengineering and Bioelectrochemistry Group, Departament d'Enginyeria Química, Escola Tècnica Superior d'Enginyeria Química, Universitat Rovira i Virgili, Avd. Països Catalans 26, 43007 Tarragona, Spain
| | | |
Collapse
|
19
|
Abbaspour A, Baramakeh L, Nabavizadeh SM. Development of a disposable sensor for electrocatalytic detection of guanine and ss-DNA using a modified sol–gel screen-printed carbon electrode. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.01.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
Adsorption of the oligonucleotides A10, A25, A50 and A80 at the mercury/electrolyte interface. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.08.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
21
|
Niu SY, Zhang SS, Wang L, Li XM. Hybridization biosensor using di(1,10-phenanthroline) (imidazo[f]1,10-phenanthroline)cobalt(II) as electrochemical indicator for detection of human immunodeficiency virus DNA. J Electroanal Chem (Lausanne) 2006. [DOI: 10.1016/j.jelechem.2006.09.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
22
|
Hasoň S, Vetterl V. Detection of synthetic oligonucleotides by alternating current voltammetry at solid amalgam surfaces. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2006.03.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
23
|
|
24
|
Electrochemical Properties of Nucleic Acid Components. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1871-0069(05)01002-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
25
|
|
26
|
Li N, Guo L, Jiang J, Yang X. Interaction of echinomycin with guanine: electrochemistry and spectroscopy studies. Biophys Chem 2004; 111:259-65. [PMID: 15501569 DOI: 10.1016/j.bpc.2004.06.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2004] [Revised: 06/10/2004] [Accepted: 06/16/2004] [Indexed: 11/22/2022]
Abstract
The interaction of antitumor antibiotic, echinomycin (Echi) with guanine (Gua) was thoroughly investigated by adsorptive transfer stripping cyclic voltammetry, ultraviolet and visible adsorption spectra (UV/Vis) and Fourier-transform infrared spectroscopy (FTIR). Electrochemistry provided a simple tool for verifying the occurrence of interaction between Echi and Gua. Echi could be accumulated from the solution and give well-defined electrochemical signals in 0.1 M phosphate buffer solution (pH 7.0) only when Gua was present on the surface of the electrochemically pretreated glass carbon electrode (GCE), suggesting a strong binding of Echi to Gua. All the acquired spectral data showed that a new adduct between Echi and Gua was formed, and two pairs of adjacent intermolecular hydrogen bonds between the Ala backbone atoms in Echi and Gua (Ala-NH to Gua-N3 and Gua-NH2 to Ala-CO) played a dominating role in the interaction. Electrochemistry coupled with spectroscopy techniques could provide a relatively easy way to obtain useful insights into the molecular mechanism of drug-DNA interactions, which should be important in the development of new anticancer drugs with specific base recognition.
Collapse
Affiliation(s)
- Nan Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | | | | | | |
Collapse
|
27
|
Abo-el-Maali N. Voltammetric analysis of drugs. Bioelectrochemistry 2004; 64:99-107. [PMID: 15219253 DOI: 10.1016/j.bioelechem.2004.03.003] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2003] [Revised: 03/12/2004] [Accepted: 03/15/2004] [Indexed: 11/29/2022]
Abstract
A review on the voltammetric analysis of drugs is presented. The review includes a summary of the rules that must be considered for drug analysis and a survey of the use of voltammetry for drug analysis in the period from 1998 till 2002.
Collapse
Affiliation(s)
- Nagwa Abo-el-Maali
- Department of Chemistry, Faculty of Science, Assiut University, 71516 Assiut, Egypt.
| |
Collapse
|
28
|
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.
Collapse
|
29
|
Guan JG, Miao YQ, Zhang QJ. Impedimetric biosensors. J Biosci Bioeng 2004; 97:219-26. [PMID: 16233619 DOI: 10.1016/s1389-1723(04)70195-4] [Citation(s) in RCA: 181] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2003] [Accepted: 12/12/2003] [Indexed: 10/26/2022]
Abstract
Electrochemical impedance spectroscopy (EIS) is a sensitive indicator of a wide variety of chemical and physical properties. An increasing trend towards the development of impedimetric biosensors is being currently observed. Impedimetric techniques have been performed to characterize the fabrication of the biosensors and to monitor the catalyzed reactions of enzymes or the biomolecular recognition events of specific binding proteins, lectins, receptors, nucleic acids, whole cells, antibodies or antibody-related substances. However, little attention has been paid to reviewing this interesting research area. Herein, impedimetric biosensors are reviewed and many novel designs are discussed.
Collapse
Affiliation(s)
- Jian-Guo Guan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P.R. China.
| | | | | |
Collapse
|