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Shumyantseva VV, Pronina VV, Bulko TV, Agafonova LE. Electroanalysis in Pharmacogenomic Studies: Mechanisms of Drug Interaction with DNA. BIOCHEMISTRY. BIOKHIMIIA 2024; 89:S224-S233. [PMID: 38621752 DOI: 10.1134/s0006297924140128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/03/2023] [Accepted: 10/11/2023] [Indexed: 04/17/2024]
Abstract
The review discusses electrochemical methods for analysis of drug interactions with DNA. The electroanalysis method is based on the registration of interaction-induced changes in the electrochemical oxidation potential of heterocyclic nitrogenous bases in the DNA molecule and in the maximum oxidation current amplitude. The mechanisms of DNA-drug interactions can be identified based on the shift in the electrooxidation potential of heterocyclic nitrogenous bases toward more negative (cathodic) or positive (anodic) values. Drug intercalation into DNA shifts the electrochemical oxidation potential to positive values, indicating thermodynamically unfavorable process that hinders oxidation of nitrogenous bases in DNA. The potential shift toward the negative values indicates electrostatic interactions, e.g., drug binding in the DNA minor groove, since this process does not interfere with the electrochemical oxidation of bases. The concentration-dependent decrease in the intensity of electrochemical oxidation of DNA bases allows to quantify the type of interaction and calculate the binding constants.
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Affiliation(s)
- Victoria V Shumyantseva
- Orekhovich Research Institute of Biomedical Chemistry, Laboratory of Bioelectrochemistry, Moscow, 119121, Russia.
- Department of Biochemistry, Pirogov Russian National Research Medical University, Moscow, 117997, Russia
| | - Veronica V Pronina
- Orekhovich Research Institute of Biomedical Chemistry, Laboratory of Bioelectrochemistry, Moscow, 119121, Russia
| | - Tatiana V Bulko
- Orekhovich Research Institute of Biomedical Chemistry, Laboratory of Bioelectrochemistry, Moscow, 119121, Russia
| | - Lyubov E Agafonova
- Orekhovich Research Institute of Biomedical Chemistry, Laboratory of Bioelectrochemistry, Moscow, 119121, Russia
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Nouri M, Rahimnejad M, Najafpour G, Moghadamnia AA. Fabrication of an ultra-sensitive electrochemical DNA biosensor based on CT-DNA/NiFe 2O 4NPs/Au/CPE for detecting rizatriptan benzoate. ENVIRONMENTAL RESEARCH 2023; 236:116801. [PMID: 37558112 DOI: 10.1016/j.envres.2023.116801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/24/2023] [Accepted: 07/29/2023] [Indexed: 08/11/2023]
Abstract
A novel and first electrochemical biosensor based on Deoxyribonucleic acid (DNA) as a biological component to measure an antimigraine drug, rizatriptan benzoate (RZB) for patients under treatment in biological samples was developed. A carbon paste electrode (CPE) was modified by calf thymus (CT) double-stranded (ds)-DNA, nickel ferrite magnetic nanoparticles (NiFe2O4NPs), and gold nanoparticles (AuNPs). The morphology of the CT-DNA/NiFe2O4NPs/AuNPs/CPE was characterized by Field emission scanning electron microscope (FESEM). The presence of NiFe2O4NPs and AuNPs was confirmed by energy-dispersive X-ray spectroscopy (EDS) image of the NiFe2O4NPs/AuNPs/CPE surface. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to determine the structure and electrochemical characteristics of the CT-DNA/NiFe2O4NPs/AuNPs/CPE. Differential pulse voltammetry (DPV) was used to investigate the electrochemical behavior of RZB. Chronoamperometry (CA) was applied to study the effect of CT-DNA immobilization time on the peak oxidation current of RZB accumulated on the surface of the CT-DNA/NiFe2O4NPs/AuNPs/CPE. The results showed that, under optimum conditions, the prepared electrode responded linearly to RZB concentrations between 0.01 and 2.0 μM, with a 0.0033 μM detection limit (LOD) and 0.01 μM limit of quantification (LOQ). The parameters influencing the biosensor performance (temperature, CT-DNA immobilization time, and RZB/CT-DNA accumulation time) were optimized. DPV showed the displacement of the peak potential towards positive values and the reduction of its current, indicating that the drug could intercalate between the guanine base pairs of CT-DNA. Our biosensor was successfully applied for RZB measurement in human urine, blood serum, plasma samples, and tablets. The presented biosensor was fast response, sensitive, selective, cost-effective, and easy-to-use for RZB determination in pharmaceutical formulations and biological samples.
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Affiliation(s)
- Maedeh Nouri
- Biofuel and Renewable Energy Research Center, Department of Biotechnology, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
| | - Mostafa Rahimnejad
- Biofuel and Renewable Energy Research Center, Department of Biotechnology, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran.
| | - Ghasem Najafpour
- Biotechnology Research Laboratory, Department of Biotechnology, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
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Pronina VV, Kostryukova LV, Bulko TV, Shumyantseva VV. Interaction of Doxorubicin Embedded into Phospholipid Nanoparticles and Targeted Peptide-Modified Phospholipid Nanoparticles with DNA. Molecules 2023; 28:5317. [PMID: 37513191 PMCID: PMC10385298 DOI: 10.3390/molecules28145317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/22/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
The interactions of dsDNA with new targeted drug delivery derivatives of doxorubicin (DOX), such as DOX embedded into phospholipid nanoparticles (NPhs) and DOX with the NGR targeted peptide-modified NPhs were studied electrochemically by differential pulse voltammetry technique. Screen-printed electrodes (SPEs), modified with stable fine dispersions of carbon nanotubes (CNTs), were used for quantitative electrochemical investigations of direct electrochemical oxidation of guanine, adenine, and thymine heterocyclic bases of dsDNA, and their changes in the presence of DOX nanoderivatives. Analysing the shifts of peak potentials of nucleobases in the presence of drug, we have shown that the doxorubicin with NGR targeted peptide changed the mode of interaction in DNA-drug complexes from intercalative to electrostatic. Binding constants (Kb) of DNA-drug complexes were calculated in accordance with adenine, guanine, and thymine oxidation signals. Based on our experiments, we have proven that the surface modification of a drug delivery system with NGR targeted peptide dramatically changed the mechanism of interaction of drug with genetic material. DNA-mediated drug toxicity was calculated based on the concentration-dependent "response" of heterocyclic nucleobases on drug influence. DOX, DOX-loaded phospholipid nanoparticles (NPhs), and DOX with NGR addressed peptide-modified NPhs were moderately toxic in the concentration range of 0.5-290 µM.
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Affiliation(s)
- Veronica V Pronina
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
| | - Lyubov V Kostryukova
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
| | - Tatiana V Bulko
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
| | - Victoria V Shumyantseva
- Institute of Biomedical Chemistry, Pogodinskaya Street, 10, Build 8, 119121 Moscow, Russia
- Faculty of Biochemistry, Pirogov Russian National Research Medical University, Ostrovitianov Street, 1, 117997 Moscow, Russia
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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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Chiorcea-Paquim AM, Oliveira-Brett AM. Electrochemistry of chemotherapeutic alkylating agents and their interaction with DNA. J Pharm Biomed Anal 2022; 222:115036. [DOI: 10.1016/j.jpba.2022.115036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 10/14/2022]
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Kinetic and thermodynamic studies on the interaction between calf thymus DNA and food additive vanillin - electrochemical methods. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hájková-Strejcová A, Augustín M, Barek J, Iffelsberger C, Matysik FM, Vyskočil V. New strategy in electrochemical investigation of DNA damage demonstrated on genotoxic derivatives of fluorene. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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A reusable and sensitive electrochemical sensor for determination of Allura red in the presence of Tartrazine based on functionalized nanodiamond@SiO2@TiO2; an electrochemical and molecular docking investigation. Food Chem Toxicol 2022; 164:113080. [DOI: 10.1016/j.fct.2022.113080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/17/2022] [Accepted: 04/23/2022] [Indexed: 12/27/2022]
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Morawska K, Ciesielski W, Smarzewska S. First electroanalytical studies of methoxyfenozide and its interactions with dsDNA. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Shumyantseva VV, Bulko TV, Tikhonova EG, Sanzhakov MA, Kuzikov AV, Masamrekh RA, Pergushov DV, Schacher FH, Sigolaeva LV. Electrochemical studies of the interaction of rifampicin and nanosome/rifampicin with dsDNA. Bioelectrochemistry 2020; 140:107736. [PMID: 33494014 DOI: 10.1016/j.bioelechem.2020.107736] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 12/31/2022]
Abstract
The interactions of dsDNA with rifampicin (RF) or with rifampicin after encapsulation in phospholipid micelles (nanosome/rifampicin) (NRF) were studied electrochemically. Screen-printed electrodes (SPEs) modified by stable dispersions of multi-wolled carbon nanotubes (MWCNTs) in aqueous solution of poly(1,2-butadiene)-block-poly(2-(dimethylamino)ethyl methacrylate) (PB290-b-PDMAEMA240) diblock copolymer were used for quantitative electrochemical investigation of direct electrochemical oxidation of guanine at E = 0.591 V (vs. Ag/AgCl) and adenine at E = 0.874 V (vs. Ag/AgCl) of dsDNA and its change in the presence of RF or NRF. Due to RF or NRF interaction with dsDNA, the differential pulse voltammetry (DPV) peak currents of guanine and adenine decreased and the peak potentials shifted to more positive values with increasing drug concentration (RF or NRF). Binding constants (Kb) of complexes RF-dsDNA and NRF-dsDNA were calculated based on adenine and guanine oxidation signals. The Kb values for RF-dsDNA were 1.48 × 104 M-1/8.56 × 104 M-1, while for NRF-dsDNA were 2.51 × 104 M-1/1.78 × 103 M-1 (based on adenine or guanine oxidation signals, respectively). The values of Kb revealed intercalation mode of interaction with dsDNA for RF and mixed type of interaction (intercalation and electrostatic mode) for NRF. The estimated values of ΔG (Gibbs free energy) of the complex formation confirmed that drug-dsDNA interactions are spontaneous and favourable reactions.
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Affiliation(s)
- Victoria V Shumyantseva
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia; Pirogov Russian National Research Medical University, Ostrovitianov Street 1, 117997 Moscow, Russia; Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia.
| | - Tatiana V Bulko
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia; Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - Elena G Tikhonova
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia
| | - Maxim A Sanzhakov
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia
| | - Alexey V Kuzikov
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia; Pirogov Russian National Research Medical University, Ostrovitianov Street 1, 117997 Moscow, Russia; Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - Rami A Masamrekh
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia; Pirogov Russian National Research Medical University, Ostrovitianov Street 1, 117997 Moscow, Russia; Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - Dmitry V Pergushov
- Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia
| | - Felix H Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller-University Jena, D-07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, D-07743 Jena, Germany; Center for Energy and Environmental Chemistry (CEEC), Friedrich-Schiller-University Jena, D-07743 Jena, Germany
| | - Larisa V Sigolaeva
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia; Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russia
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Cano A, Espina M, García ML. Recent Advances on Antitumor Agents-loaded Polymeric and Lipid-based Nanocarriers for the Treatment of Brain Cancer. Curr Pharm Des 2020; 26:1316-1330. [PMID: 31951159 DOI: 10.2174/1381612826666200116142922] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 12/11/2019] [Indexed: 12/14/2022]
Abstract
In 2016, there were 17.2 million cancer cases, which caused 8.9 million deaths worldwide. Of all cancers, ranked by absolute years of life lost, brain and central nervous system cancers were classified in the nine positions between 2006 and 2016. Glioblastoma is the most common malignant primary brain tumor and comprises 80% of malignant tumours. The therapeutic approach usually involves the combination of surgery and radiotherapy, which present a high risk for the patient and are not always effective in the most aggressive cases. Chemotherapy commonly includes a specific number of cycles given over a set period of time, in which patients receive one drug or a combination of different compounds. The difficulty of access for the neurosurgeon to remove the tumor, the limitation of the penetration of the antitumor agents caused by the blood-brain barrier and the serious adverse effects of these drugs significantly compromise the therapeutic success in these patients. To solve these problems and improve the effectiveness of existing treatments, as well as new molecules, the use of nanotechnology is arousing much interest in the last decades in this field. The use of polymeric and lipid-based nanosystems is one of the best alternatives for the central delivery of drugs due to their versatility, easy manufacturing, biocompatibility, biodegradability and drug targeting, among other virtues. Thus, in this review, we will explore the recent advances in the latest anticancer agent's development associated with polymeric and lipid-based nanocarriers as a novel tools for the management of brain tumors.
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Affiliation(s)
- Amanda Cano
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), Barcelona, Spain.,Biomedical Research Networking Centre in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
| | - Marta Espina
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), Barcelona, Spain
| | - Maria L García
- Department of Pharmacy, Pharmaceutical Technology and Physical Chemistry, Faculty of Pharmacy and Food Sciences, University of Barcelona, Spain.,Institute of Nanoscience and Nanotechnology (IN2UB), Barcelona, Spain.,Biomedical Research Networking Centre in Neurodegenerative Diseases (CIBERNED), Madrid, Spain
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Rupar J, Aleksić MM, Dobričić V, Brborić J, Čudina O. An electrochemical study of 9-chloroacridine redox behavior and its interaction with double-stranded DNA. Bioelectrochemistry 2020; 135:107579. [DOI: 10.1016/j.bioelechem.2020.107579] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 05/25/2020] [Accepted: 05/31/2020] [Indexed: 10/24/2022]
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Bakirhan NK, Topal BD, Ozcelikay G, Karadurmus L, Ozkan SA. Current Advances in Electrochemical Biosensors and Nanobiosensors. Crit Rev Anal Chem 2020; 52:519-534. [DOI: 10.1080/10408347.2020.1809339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Nurgul K. Bakirhan
- Department of Analytical Chemistry, Gulhane Faculty of Pharmacy, University of Health Sciences, Ankara, Turkey
| | - Burcu D. Topal
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - Goksu Ozcelikay
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - Leyla Karadurmus
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
- Department of Analytical Chemistry, Faculty of Pharmacy, Adıyaman University, Adıyaman, Turkey
| | - Sibel A. Ozkan
- Department of Analytical Chemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
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Bayraktepe DE. A voltammetric study on drug-DNA interactions: Kinetic and thermodynamic aspects of the relations between the anticancer agent dasatinib and ds-DNA using a pencil lead graphite electrode. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104946] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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15
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Ibrahim M, Ibrahim H, Almandil NB, Sayed MA, Kawde A, Aldaqdouq Y. A Novel Platform Based on Au−CeO
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@MWCNT Functionalized Glassy Carbon Microspheres for Voltammetric Sensing of Valrubicin as Bladder Anticancer Drug and its Interaction with DNA. ELECTROANAL 2020. [DOI: 10.1002/elan.202060125] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mohamed Ibrahim
- Department of Clinical Pharmacy Research Institute for Research and Medical Consultations Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Hossieny Ibrahim
- Chemistry Department Faculty of Science Assiut University Assiut Egypt
| | - Noor B. Almandil
- Department of Clinical Pharmacy Research Institute for Research and Medical Consultations Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
| | - Marwa A. Sayed
- Department of Industrial Pharmacy Faculty of Pharmacy Assiut University Assiut 71526 Egypt
| | - Abdel‐Nasser Kawde
- Chemistry Department College of Sciences King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
| | - Yaqeen Aldaqdouq
- College of Clinical Pharmacy Imam Abdulrahman Bin Faisal University P.O. Box 1982 Dammam 31441 Saudi Arabia
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Morawska K, Popławski T, Ciesielski W, Smarzewska S. Electrochemical and spectroscopic studies of the interaction of antiviral drug Tenofovir with single and double stranded DNA. Bioelectrochemistry 2018; 123:227-232. [DOI: 10.1016/j.bioelechem.2018.06.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 05/21/2018] [Accepted: 06/01/2018] [Indexed: 10/14/2022]
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17
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Unal DN, Eksin E, Erdem A. Electrochemical Determination of 6-Thioguanine and Its Interaction with DNA Oligonucleotides Using Disposable Graphite Pencil Electrodes. ANAL LETT 2017. [DOI: 10.1080/00032719.2017.1338714] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Didem Nur Unal
- Faculty of Pharmacy, Analytical Chemistry Department, Ege University, Izmir, Turkey
| | - Ece Eksin
- Faculty of Pharmacy, Analytical Chemistry Department, Ege University, Izmir, Turkey
| | - Arzum Erdem
- Faculty of Pharmacy, Analytical Chemistry Department, Ege University, Izmir, Turkey
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A novel electrochemical platform based on carbon nanofibers and tri-metallic nanoparticles of gold, nickel and cobalt for the quantification of ethyl paraben. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 72:301-307. [DOI: 10.1016/j.msec.2016.11.080] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/09/2016] [Accepted: 11/17/2016] [Indexed: 11/15/2022]
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19
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Sayed M, Krishnamurthy B, Pal H. Unraveling multiple binding modes of acridine orange to DNA using a multispectroscopic approach. Phys Chem Chem Phys 2016; 18:24642-53. [PMID: 27545984 DOI: 10.1039/c6cp03716j] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction of acridine orange (AOH(+)) with calf thymus DNA (ct-DNA) under different dye-DNA conditions has been investigated in detail using multispectroscopic techniques, unraveling a number of hitherto unexplored intricacies of dye-DNA binding. The observed results intriguingly show contrasting binding features when low (2.4 μM) and significantly high (23 μM) dye concentrations are used. It is conclusively inferred from absorption, steady-state fluorescence, circular dichroism, fluorescence decay and anisotropy decay studies that at low [DNA] to [dye] ratio, especially with higher dye concentration, dimeric AOH(+) predominantly binds externally to DNA surfaces through electrostatic interactions. At sufficiently high [DNA] to [dye] ratios, however, the interaction intriguingly changes to monomeric AOH(+) bound to DNA, predominantly in the intercalative mode between DNA base pairs, with partly an electrostatic binding on DNA surfaces. With very low initial dye concentration, monomeric (AOH(+)) mostly binds to DNA through intercalative and electrostatic modes for most DNA to dye ratios. The present study demonstrates a systematic correlation of the striking changes in the photophysical properties of the dye upon multimode binding with DNA. The observed results are of great significance in understanding the fundamental insights of dye/drug binding to DNA hosts, of use in the design of effective therapeutic agents.
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Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
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