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Szczepaniak O, Ligaj M. May DNA analyses be biased by hidden oxidative damage? Voltammetric study of temperature and oxidation stress effect. PLoS One 2024; 19:e0305590. [PMID: 38875261 PMCID: PMC11178200 DOI: 10.1371/journal.pone.0305590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 06/01/2024] [Indexed: 06/16/2024] Open
Abstract
The analysis of nucleic acids is one of the fundamental parts of modern molecular biology and molecular diagnostics. The information collected predominantly depends on the condition of the genetic material. All potential damage induced by oxidative stress may affect the final results of the analysis of genetic material obtained using commonly used techniques such as polymerase chain reaction or sequencing. The aim of this work was to evaluate the effects of high temperature and pH on DNA structure in the context of the occurrence of oxidative damage, using square-wave voltammetry and two independent research protocols. We resulted in visible oxidation damage registered in acidic conditions after the thermal denaturation process (pH 4.7) with changes in the intensity of guanine and adenine signals. However, using phosphate buffer (pH 7.0) for DNA denaturation negatively affected the DNA structure, but without any oxidized derivatives present. This leads to the conclusion that oxidation occurring in the DNA melting process results in the formation of various derivatives of nucleobases, both electrochemically active and inactive. These derivatives may distort the results of molecular tests due to the possibility of forming complementary bonds with various nucleobases. For example, 8-oxoguanine can form pairs with both cytosine and adenine.
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Affiliation(s)
- Oskar Szczepaniak
- Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Poznań, Poland
| | - Marta Ligaj
- Department of Industrial Products and Packaging Quality, Poznań University of Economics and Business, Poznań, Poland
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2
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Suprun EV, Khmeleva SA, Duskaev IF, Ptitsyn KG, Kurbatov LK, Shershov VE, Kuznetsova VE, Lapa SA, Chudinov AV, Radko SP. Combining recombinase polymerase amplification with tyrosine modified 2'-deoxyuridine-5'-triphosphate for direct voltammetric detection of double-stranded DNA: Application to potato pathogen Dickeya solani. Talanta 2024; 273:125841. [PMID: 38460421 DOI: 10.1016/j.talanta.2024.125841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/22/2024] [Accepted: 02/26/2024] [Indexed: 03/11/2024]
Abstract
The approach based on a combination of isothermal recombinase polymerase amplification (RPA), 2'-deoxyuridine-5'-triphosphate modified with tyrosine aromatic group (dUTP-Y1), and direct voltammetric detection of RPA product carrying electroactive labels was successfully applied to the potato pathogen Dickeya solani. The artificial nucleotide dUTP-Y1 demonstrated a good compatibility with RPA, enabling by targeting a section of D. solani genome with a unique sequence to produce the full-size modified products at high levels of substitution of dTTP by dUTP-Y1 (up to 80-90 %) in the reaction mixture. The optimized procedure of square wave voltammetry allowed to reliably detect the product generated by RPA at 80 % substitution of dTTP by dUTP-Y1 (dsDNA-Y1) in microliter sample volumes on the surface of disposable carbon screen printed electrodes at the potential of about 0.6 V. The calibration curve for the amplicon detection was linear in coordinates 'Ip, A vs. Log (c, M)' within the 0.05-1 μM concentration range. The limit of detection for dsDNA-Y1 was estimated as 8 nM. The sensitivity of the established electrochemical approach allowed to detect amplicons generated in a single standard 50 μL RPA reaction after their purification with silica-coated magnetic beads. The overall detectability of D. solani with the suggested combination of RPA and voltammetric registration of dsDNA-Y1 can be as low as a few copies of bacterial genome per standard reaction. In total, amplification, purification, and electrochemical detection take about 120-150 min. Considering the potential of direct electrochemical analysis for miniaturization, as well as compliance with low-cost and low-power requirements, the findings provide grounds for future development of microfluidic devices integrating isothermal amplification, amplicon purification and detection based on the tyrosine modified nucleotide for the purpose of 'on-site' detection of various pathogens.
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Affiliation(s)
- Elena V Suprun
- Chemistry Faculty of M.V. Lomonosov Moscow State University, Lenin Hills, 1/3, Moscow, 119991, Russia; Institute of Biomedical Chemistry, Pogodinskaya Street, 10/8, Moscow, 119121, Russia.
| | - Svetlana A Khmeleva
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10/8, Moscow, 119121, Russia
| | - Insaf F Duskaev
- Chemistry Faculty of M.V. Lomonosov Moscow State University, Lenin Hills, 1/3, Moscow, 119991, Russia; Institute of Biomedical Chemistry, Pogodinskaya Street, 10/8, Moscow, 119121, Russia
| | - Konstantin G Ptitsyn
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10/8, Moscow, 119121, Russia
| | - Leonid K Kurbatov
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10/8, Moscow, 119121, Russia
| | - Valeriy E Shershov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street, 32, Moscow, 119991, Russia
| | - Viktoriya E Kuznetsova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street, 32, Moscow, 119991, Russia
| | - Sergey A Lapa
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street, 32, Moscow, 119991, Russia
| | - Alexander V Chudinov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilov Street, 32, Moscow, 119991, Russia
| | - Sergey P Radko
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10/8, Moscow, 119121, Russia
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3
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Malanina A, Kuzin Y, Khadieva A, Shibaeva K, Padnya P, Stoikov I, Evtugyn G. Voltammetric Sensor for Doxorubicin Determination Based on Self-Assembled DNA-Polyphenothiazine Composite. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2369. [PMID: 37630955 PMCID: PMC10459114 DOI: 10.3390/nano13162369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/27/2023]
Abstract
A novel voltammetric sensor based on a self-assembled composite formed by native DNA and electropolymerized N-phenyl-3-(phenylimino)-3H-phenothiazin-7-amine has been developed and applied for sensitive determination of doxorubicin, an anthracycline drug applied for cancer therapy. For this purpose, a monomeric phenothiazine derivative has been deposited on the glassy carbon electrode from the 0.4 M H2SO4-acetone mixture (1:1 v/v) by multiple potential cycling. The DNA aliquot was either on the electrode modified with electropolymerized film or added to the reaction medium prior to electropolymerization. The DNA entrapment and its influence on the redox behavior of the underlying layer were studied by scanning electron microscopy and electrochemical impedance spectroscopy. The DNA-doxorubicin interactions affected the charge distribution in the surface layer and, hence, altered the redox equilibrium of the polyphenothiazine coating. The voltametric signal was successfully applied for the determination of doxorubicin in the concentration range from 10 pM to 0.2 mM (limit of detection 5 pM). The DNA sensor was tested on spiked artificial plasma samples and two commercial medications (recovery of 90-95%). After further testing on real clinical samples, the electrochemical DNA sensor developed can find application in monitoring drug release and screening new antitumor drugs able to intercalate DNA.
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Affiliation(s)
- Anastasiya Malanina
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlevskaya Street, Kazan 420008, Russia
| | - Yurii Kuzin
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlevskaya Street, Kazan 420008, Russia
| | - Alena Khadieva
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlevskaya Street, Kazan 420008, Russia
| | - Kseniya Shibaeva
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlevskaya Street, Kazan 420008, Russia
| | - Pavel Padnya
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlevskaya Street, Kazan 420008, Russia
| | - Ivan Stoikov
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlevskaya Street, Kazan 420008, Russia
| | - Gennady Evtugyn
- A.M. Butlerov Chemistry Institute, Kazan Federal University, 18 Kremlevskaya Street, Kazan 420008, Russia
- Analytical Chemistry Department, Chemical Technology Institute, Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russia
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4
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Smith JA, Nguyen BH, Carlson R, Bertram JG, Palluk S, Arlow DH, Strauss K. Spatially Selective Electrochemical Cleavage of a Polymerase-Nucleotide Conjugate. ACS Synth Biol 2023; 12:1716-1726. [PMID: 37192389 PMCID: PMC10278165 DOI: 10.1021/acssynbio.3c00044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Indexed: 05/18/2023]
Abstract
Novel enzymatic methods are poised to become the dominant processes for de novo synthesis of DNA, promising functional, economic, and environmental advantages over the longstanding approach of phosphoramidite synthesis. Before this can occur, however, enzymatic synthesis methods must be parallelized to enable production of multiple DNA sequences simultaneously. As a means to this parallelization, we report a polymerase-nucleotide conjugate that is cleaved using electrochemical oxidation on a microelectrode array. The developed conjugate maintains polymerase activity toward surface-bound substrates with single-base control and detaches from the surface at mild oxidative voltages, leaving an extendable oligonucleotide behind. Our approach readies the way for enzymatic DNA synthesis on the scale necessary for DNA-intensive applications such as DNA data storage or gene synthesis.
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Affiliation(s)
- Jake A. Smith
- Microsoft
Research, Redmond, Washington 98052, United States
- Paul
G. Allen School of Computer Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Bichlien H. Nguyen
- Microsoft
Research, Redmond, Washington 98052, United States
- Paul
G. Allen School of Computer Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Rob Carlson
- Microsoft
Research, Redmond, Washington 98052, United States
| | | | - Sebastian Palluk
- Ansa
Biotechnologies, Emeryville, California 94608, United States
| | - Daniel H. Arlow
- Ansa
Biotechnologies, Emeryville, California 94608, United States
| | - Karin Strauss
- Microsoft
Research, Redmond, Washington 98052, United States
- Paul
G. Allen School of Computer Science and Engineering, University of Washington, Seattle, Washington 98195, United States
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5
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Kulikova T, Shiabiev I, Padnya P, Rogov A, Evtugyn G, Stoikov I, Porfireva A. Impedimetric DNA Sensor Based on Electropolymerized N-Phenylaminophenothiazine and Thiacalix[4]arene Tetraacids for Doxorubicin Determination. BIOSENSORS 2023; 13:bios13050513. [PMID: 37232875 DOI: 10.3390/bios13050513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 04/24/2023] [Accepted: 04/26/2023] [Indexed: 05/27/2023]
Abstract
Electrochemical DNA sensors are highly demanded for fast and reliable determination of antitumor drugs and chemotherapy monitoring. In this work, an impedimetric DNA sensor has been developed on the base of a phenylamino derivative of phenothiazine (PhTz). A glassy carbon electrode was covered with electrodeposited product of PhTz oxidation obtained through multiple scans of the potential. The addition of thiacalix[4]arene derivatives bearing four terminal carboxylic groups in the substituents of the lower rim improved the conditions of electropolymerization and affected the performance of the electrochemical sensor depending on the configuration of the macrocyclic core and molar ratio with PhTz molecules in the reaction medium. Following that, the deposition of DNA by physical adsorption was confirmed by atomic force microscopy and electrochemical impedance spectroscopy. The redox properties of the surface layer obtained changed the electron transfer resistance in the presence of doxorubicin due to its intercalating DNA helix and influencing charge distribution on the electrode interface. This made it possible to determine 3 pM-1 nM doxorubicin in 20 min incubation (limit of detection 1.0 pM). The DNA sensor developed was tested on a bovine serum protein solution, Ringer-Locke's solution mimicking plasma electrolytes and commercial medication (doxorubicin-LANS) and showed a satisfactory recovery rate of 90-105%. The sensor could find applications in pharmacy and medical diagnostics for the assessment of drugs able to specifically bind to DNA.
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Affiliation(s)
- Tatjana Kulikova
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russia
| | - Igor Shiabiev
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russia
| | - Pavel Padnya
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russia
| | - Alexey Rogov
- Interdisciplinary Center of Analytical Microscopy of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russia
| | - Gennady Evtugyn
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russia
- Analytical Chemistry Department, Chemical Technology Institute, Ural Federal University, 19 Mira Street, 620002 Ekaterinburg, Russia
| | - Ivan Stoikov
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russia
| | - Anna Porfireva
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russia
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6
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Hassan Q, Riley C, Noroozifar M, Kerman K. Hybrid Nanomaterial of Graphene Oxide Quantum Dots with Multi-Walled Carbon Nanotubes for Simultaneous Voltammetric Determination of Four DNA Bases. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13091509. [PMID: 37177060 PMCID: PMC10180489 DOI: 10.3390/nano13091509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/19/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
In this proof-of-concept study, a novel hybrid nanomaterial-based electrochemical sensor was developed for the simultaneous detection of four DNA bases. For the modification of the working electrode surface, graphene oxide quantum dots (GOQDs) were synthesized using a solvothermal method. GOQDs were then used for the preparation of a hybrid nanomaterial with multi-walled carbon nanotubes (GOQD-MWCNT) using a solvothermal technique for the first time. Transmission electron microscopy (TEM) was used to characterize the GOQDs-MWCNTs. A glassy carbon electrode (GCE) was modified with the GOQDs-MWCNTs using Nafion™ to prepare a GOQD-MWCNT/GCE for the simultaneous determination of four DNA bases in phosphate buffer solution (PBS, pH 7.0) using differential pulse voltammetry (DPV). The calibration plots were linear up to 50, 50, 500, and 500 µM with a limit of detection at 0.44, 0.2, 1.6, and 5.6 µM for guanine (G), adenine (A), thymine (T) and cytosine (C), respectively. The hybrid-modified sensor was used for the determination of G, A, T, and C spiked in the artificial saliva samples with the recovery values ranging from 95.9 to 106.8%. This novel hybrid-modified electrochemical sensor provides a promising platform for the future development of a device for cost-effective and efficient simultaneous detection of DNA bases in real biological and environmental samples.
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Affiliation(s)
- Qusai Hassan
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Chevon Riley
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
| | - Meissam Noroozifar
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
| | - Kagan Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON M1C 1A4, Canada
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
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7
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Guo FF, Li T, Mu XP, Zhang X, Xu ZH, Sun P, Yu RL, Xia YM, Gao WW. Electrochemical detection of the oxidative damage of a potential pyrimido[5,4-g]pteridine-derived antitumor agent toward DNA. Anal Bioanal Chem 2023; 415:2249-2260. [PMID: 36920495 DOI: 10.1007/s00216-023-04643-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 03/08/2023] [Indexed: 03/16/2023]
Abstract
In this work, we design and synthesize 2,2'-(7,9-dimethyl-2,4,6,8-tetraoxo-6,7,8,9-tetrahydropyrimido[5,4-g]pteridine-1,3(2H,4H)-diyl)bis(N,N-bis(2-chloroethyl)acetamide) (PT-MCA) as a novel DNA intercalator and potential antitumor agent. Electrochemical analysis reveals the redox process of PT-MCA on the electrode surface. The bioelectrochemical sensors are obtained by modifying the surface of GCE with calf thymus DNA (ctDNA), poly (dG), poly (dA), and G-quadruplex, respectively. The DNA oxidative damage induced by PT-MCA is investigated by comparing the peak intensity change of dGuo and dAdo and monitoring the peaks of the oxidation products of guanine and/or adenine (8-oxoGua and/or 2,8-oxoAde). UV-vis absorption and fluorescence spectra and gel electrophoresis are further employed to understand the intercalation of PT-MCA into DNA base pairs. Moreover, PT-MCA is proved to exhibit stronger anti-proliferation activity than mitoxantrone against both 4T1 and B16-F10 cancer cells. At last, the oxidative damage of PT-MCA toward ctDNA is not interfered by the coexistence of ions and also can be detected in real serums.
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Affiliation(s)
- Fei-Fei Guo
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Tong Li
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Xi-Ping Mu
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Xue Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Zhi-Hao Xu
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Ping Sun
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China
| | - Ri-Lei Yu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, People's Republic of China
| | - Ya-Mu Xia
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
| | - Wei-Wei Gao
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People's Republic of China.
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8
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Evtugyn GA, Porfireva AV, Belyakova SV. Electrochemical DNA sensors for drug determination. J Pharm Biomed Anal 2022; 221:115058. [PMID: 36179503 DOI: 10.1016/j.jpba.2022.115058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022]
Abstract
In this review, recent achievements in the development of the DNA biosensors developed for the drug determination have been presented with particular emphasis to the main principles of their assembling and signal measurement approaches. The design of the DNA sensors is considered with characterization of auxiliary components and their necessity for the biosensor operation. Carbon nanomaterials, metals and their complexes as well as electropolymerized polymers are briefly described in the assembly of DNA sensors. The performance of the DNA sensors is summarized within 2017-2022 for various drugs and factors influencing the sensitivity and selectivity of the response are discussed. Special attention is paid to the mechanism of the signal generation and possible drawbacks in the analysis of real samples.
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Affiliation(s)
- G A Evtugyn
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russian Federation; Analytical Chemistry Department of Chemical Technology Institute of Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russian Federation.
| | - A V Porfireva
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russian Federation
| | - S V Belyakova
- A.M. Butlerov' Chemistry Institute of Kazan Federal University, 18 Kremlevskaya Street, 420008 Kazan, Russian Federation
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9
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Suprun EV, Budnikov HC. Bioelectrochemistry as a Field of Analysis: Historical Aspects and Current Status. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s1061934822060168] [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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10
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Eksin E. An electrochemical assay for sensitive detection of Acinetobacter baumannii gene. Talanta 2022; 249:123696. [PMID: 35749906 DOI: 10.1016/j.talanta.2022.123696] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/12/2022] [Accepted: 06/14/2022] [Indexed: 11/25/2022]
Abstract
A new genosensor, which allows sensitive and selective detection of Acinetobacter baumannii gene sequence was developed herein. In this assay, capture probe of Acinetobacter baumannii was immobilized on the surface of chitosan modified single-use pencil graphite electrodes (c-PGEs) to obtain Acinetobacter baumannii genosensor. Then, Acinetobacter baumannii target DNA sequence was recognized after solid-state hybridization on c-PGE genosensor by measuring guanine signal via differential pulse voltammetry (DPV). In order to improve hybridization efficiency, experimental parameters affecting all assay steps are studied and the analytical performance of the genosensor was tested. The low limit of detection (LOD) for Acinetobacter baumannii target DNA sequence was obtained as 1.86 nM with developed genosensor. The selectivity of the proposed assay was then tested in the presence of 1-base mismatch, or two different type of non-complementary sequences and no interference effect was observed. The proposed electrochemical assay protocol is easy, convenient, and rapid which can be a decent alternative to existing methods.
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Affiliation(s)
- Ece Eksin
- Biomedical Device Technology Program, Vocational School of Health Services, Izmir Democracy University, Izmir 35140, Turkey; Department of Analytical Chemistry, Faculty of Pharmacy, Ege University, Izmir 35100, Turkey.
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11
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Suprun EV, Khmeleva SA, Kutdusova GR, Ptitsyn KG, Kuznetsova VE, Lapa SA, Chudinov AV, Radko SP. Deoxyuridine triphosphates modified with tyrosine aromatic groups for direct electrochemical detection of double-stranded DNA products of isothermal recombinase polymerase amplification. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.107120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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12
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Suprun EV. Direct electrochemistry of proteins and nucleic acids: The focus on 3D structure. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.106983] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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