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Elfiky M, Ghoneim M, El-Desoky H, Hassanein A, Salahuddin N. Electrochemical stripping voltammetrical sensor based on polypyrrole exfoliated polyetheramine-montmorillonite nanocomposite for nanomolar detection of nifuroxazide. RSC Adv 2023; 13:5107-5117. [PMID: 36777946 PMCID: PMC9909373 DOI: 10.1039/d2ra06160k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 01/21/2023] [Indexed: 02/11/2023] Open
Abstract
A series of polypyrrole/polyetheramine-montmorillonite nanocomposites have been fabricated by the intercalation of different types of polyoxyalkylene amine hydrochloride (Jeffamines: D400, D2000, T5000, and T403) into montmorillonite layers via the cation-exchange process followed by in situ polymerization of pyrrole. The physicochemical characteristics of as-prepared nanocomposites were investigated using Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), and electrochemical impedance spectroscopy (EIS) instruments. The change of the types of Jeffamine causes a change in the geometrical structure, and surface area of nanocomposites. Noteworthy, the resulting polypyrrole/D2000-montmorillonite ([PDM-50]) nanocomposite exhibited a cauliflower-like shape with a specific surface area (116.2 m2 g-1) with the highest conductivity. Furthermore, the modified stripping voltammetric carbon paste sensor was fabricated based on 1.0% [PDM-50] nanocomposites to detect the drug nifuroxazide (NF). The sensor achieved detection limits (LD) of 0.24, and 0.9 nM of NF in the medication, and human urine fluid, respectively. This sensor showed appropriate repeatability, reproducibility, stability, and selectivity for NF sensing in different fluids accompanied by other interferents.
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Affiliation(s)
- Mona Elfiky
- Department of Chemistry, Faculty of Science, Tanta University 31527 Egypt +20403350804 +201004155414
| | - Mohamed Ghoneim
- Department of Chemistry, Faculty of Science, Tanta University 31527 Egypt +20403350804 +201004155414
| | - Hanaa El-Desoky
- Department of Chemistry, Faculty of Science, Tanta University 31527 Egypt +20403350804 +201004155414
| | - Amera Hassanein
- Department of Chemistry, Faculty of Science, Tanta University 31527 Egypt +20403350804 +201004155414
| | - Nehal Salahuddin
- Department of Chemistry, Faculty of Science, Tanta University 31527 Egypt +20403350804 +201004155414
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Redox conversions of new antiviral drug Triazavirin®: electrochemical study and ESR spectroscopy. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3190-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sanz CG, Dias KA, Bacil RP, Serafim RA, Andrade LH, Ferreira EI, Serrano SH. Electrochemical characterization of para- and meta-nitro substituents in aqueous media of new antichagasic pharmaceutical leaders. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137582] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Zuma NH, Aucamp J, N'Da DD. An update on derivatisation and repurposing of clinical nitrofuran drugs. Eur J Pharm Sci 2019; 140:105092. [DOI: 10.1016/j.ejps.2019.105092] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 09/17/2019] [Accepted: 09/27/2019] [Indexed: 10/25/2022]
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5
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BG126 ® phytodrug improves urinary tract infection treatment with nitrofurantoin in adult women in a double-blind randomized clinical trial. J Herb Med 2017. [DOI: 10.1016/j.hermed.2017.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Farias CF, Massaoka MH, Girola N, Azevedo RA, Ferreira AK, Jorge SD, Tavares LC, Figueiredo CR, Travassos LR. Benzofuroxan derivatives N-Br and N-I induce intrinsic apoptosis in melanoma cells by regulating AKT/BIM signaling and display anti metastatic activity in vivo. BMC Cancer 2015; 15:807. [PMID: 26503030 PMCID: PMC4621849 DOI: 10.1186/s12885-015-1835-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 10/19/2015] [Indexed: 12/14/2022] Open
Abstract
Background Malignant melanoma is an aggressive type of skin cancer, and despite recent advances in treatment, the survival rate of the metastatic form remains low. Nifuroxazide analogues are drugs based on the substitution of the nitrofuran group by benzofuroxan, in view of the pharmacophore similarity of the nitro group, improving bioavailability, with higher intrinsic activity and less toxicity. Benzofuroxan activity involves the intracellular production of free-radical species. In the present work, we evaluated the antitumor effects of different benzofuroxan derivatives in a murine melanoma model. Methods B16F10-Nex2 melanoma cells were used to investigate the antitumor effects of Benzofuroxan derivatives in vitro and in a syngeneic melanoma model in C57Bl/6 mice. Cytotoxicity, morphological changes and reactive oxygen species (ROS) were assessed by a diphenyltetrasolium reagent, optical and fluorescence microscopy, respectively. Annexin-V binding and mitochondrial integrity were analyzed by flow cytometry. Western blotting and colorimetry identified cell signaling proteins. Results Benzofuroxan N-Br and N-I derivatives were active against murine and human tumor cell lines, exerting significant protection against metastatic melanoma in a syngeneic model. N-Br and N-I induce apoptosis in melanoma cells, evidenced by specific morphological changes, DNA condensation and degradation, and phosphatidylserine translocation in the plasma membrane. The intrinsic mitochondrial pathway in B16F10-Nex2 cells is suggested owing to reduced outer membrane potential in mitochondria, followed by caspase −9, −3 activation and cleavage of PARP. The cytotoxicity of N-Br and N-I in B16F10-Nex2 cells is mediated by the generation of ROS, inhibited by pre-incubation of the cells with N-acetylcysteine (NAC). The induction of ROS by N-Br and N-I resulted in the inhibition of AKT activation, an important molecule related to tumor cell survival, followed by upregulation of BIM. Conclusion We conclude that N-Br and N-I are promising agents aiming at cancer treatment. They may be useful in melanoma therapy as inducers of intrinsic apoptosis and by exerting significant antitumor activity against metastatic melanoma, as presently shown in syngeneic mice.
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Affiliation(s)
- C F Farias
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, Rua Botucatu 862, 8 andar, São Paulo, SP, 04023-062, Brazil.
| | - M H Massaoka
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, Rua Botucatu 862, 8 andar, São Paulo, SP, 04023-062, Brazil.
| | - N Girola
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, Rua Botucatu 862, 8 andar, São Paulo, SP, 04023-062, Brazil.
| | - R A Azevedo
- Laboratory of Tumor Immunology, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
| | - A K Ferreira
- Experimental Physiopathology, Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil.
| | - S D Jorge
- Laboratory of Tumor Immunology, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
| | - L C Tavares
- Department of Biochemical and Pharmaceutical Technology, University of São Paulo, São Paulo, SP, Brazil.
| | - C R Figueiredo
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, Rua Botucatu 862, 8 andar, São Paulo, SP, 04023-062, Brazil.
| | - L R Travassos
- Experimental Oncology Unit (UNONEX), Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, Rua Botucatu 862, 8 andar, São Paulo, SP, 04023-062, Brazil.
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Cheng LX, Zhu YQ, Chen XY, Zhang ZJ. Polyvinylidene Fluoride-Based Carbon Supercapacitors: Notable Capacitive Improvement of Nanoporous Carbon by the Redox Additive Electrolyte of 4-(4-Nitrophenylazo)-1-naphthol. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b02490] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liang Xiao Cheng
- School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Yan Qi Zhu
- School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Xiang Ying Chen
- School of Chemistry and Chemical Engineering, Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, P. R. China
| | - Zhong Jie Zhang
- College of Chemistry & Chemical Engineering, Anhui Province Key Laboratory of Environment-friendly Polymer Materials, Anhui University, Hefei, Anhui 230039, P. R. China
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Aracena P, Lazo-Hernández C, Molina-Berríos A, Sepúlveda DR, Reinoso C, Larraín JI, Navarro J, Letelier ME. Microsomal oxidative stress induced by NADPH is inhibited by nitrofurantoin redox biotranformation. Free Radic Res 2013; 48:129-36. [PMID: 23967899 DOI: 10.3109/10715762.2013.836695] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nitrofurantoin is used in the antibacterial therapy of the urinary tract. This therapy is associated with various adverse effects whose mechanisms remain unclear. Diverse studies show that the nitro reductive metabolism of nitrofurantoin leads to ROS generation. This reaction can be catalyzed by several reductases, including the cytochrome P450 (CYP450) reductase. Oxidative stress arising from this nitro reductive metabolism has been proposed as the mechanism underlying the adverse effects associated with nitrofurantoin. There is, however, an apparent paradox between these findings and the ability of nitrofurantoin to inhibit lipid peroxidation provoked by NADPH in rat liver microsomes. This work was aimed to show the potential contribution of different enzymatic systems to the metabolism of this drug in rat liver microsomes. Our results show that microsomal lipid peroxidation promoted by NADPH is inhibited by nitrofurantoin in a concentration-dependent manner. This suggests that the consumption of NADPH in microsomes can be competitively promoted by lipid peroxidation and nitrofurantoin metabolism. The incubation of microsomes with NADPH and nitrofurantoin generated 1-aminohidantoin. In addition, the biotransformation of a classical substrate of CYP450 oxidative system was competitively inhibited by nitrofurantoin. These results suggest that nitrofurantoin is metabolized through CYP450 system. Data are discussed in terms of the in vitro redox metabolism of nitrofurantoin.
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Affiliation(s)
- P Aracena
- Facultad de Ciencias Químicas y Farmacéuticas, Department of Pharmacological and Toxicological Chemistry, Laboratory of Pharmacology and Toxicology, Universidad de Chile , Santiago , Chile
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Gao F, Zhang QD, Zhang ZH, Yan XD, Zhang HC, Wang JP. Residue depletion of nifuroxazide in broiler chicken. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2013; 93:2172-2178. [PMID: 23339038 DOI: 10.1002/jsfa.6024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Revised: 11/11/2012] [Accepted: 11/21/2012] [Indexed: 06/01/2023]
Abstract
BACKGROUND Several nitrofuran drugs have been prohibited for use in food producing animals due to their carcinogenic and mutagenic effects. However, one of the nitrofurans, nifuroxazide, is still used as a veterinary drug in some countries. This study was conducted to investigate the residue depletion of nifuroxazide in broiler chicken. Chickens were fed with dietary feeds containing 50 mg kg⁻¹ of nifuroxazide for seven consecutive days. Liver, kidney, muscle and plasma samples were collected at different withdrawal periods, and the residues of parent nifuroxazide and its acid-hydrolysable side chain, 4-hydroxybenzhydrazide (HBH), in these samples were determined. RESULTS Nifuroxazide was metabolised in vivo and its metabolite HBH was formed. Parent nifuroxazide was not detectable in these samples after 14 days of cessation. HBH was detectable in these samples even after 28 days of cessation and the total HBH residues were higher than 1.0 ng g⁻¹. Furthermore, the residue level of tissue bound HBH was much higher than that of free HBH. CONCLUSION The tissue-bound HBH could be used as a marker to monitor the residue of nifuroxazide in chicken and the best target tissue should be liver. This is the first paper reporting the residue depletion of nifuroxazide in chicken.
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Affiliation(s)
- Feng Gao
- College of Veterinary Medicine, Agricultural University of Hebei, Baoding Hebei, China 071000
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Jorge SD, Palace-Berl F, Mesquita Pasqualoto KF, Ishii M, Ferreira AK, Berra CM, Bosch RV, Maria DA, Tavares LC. Ligand-based design, synthesis, and experimental evaluation of novel benzofuroxan derivatives as anti-Trypanosoma cruzi agents. Eur J Med Chem 2013; 64:200-14. [PMID: 23644203 DOI: 10.1016/j.ejmech.2013.03.053] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/19/2013] [Accepted: 03/24/2013] [Indexed: 01/09/2023]
Abstract
A set of substituted-[N'-(benzofuroxan-5-yl)methylene]benzohydrazides (4a-t), previously designed and synthesized, was experimentally assayed against Trypanosoma cruzi, the etiological agent of Chagas' disease, one of the most neglected tropical diseases. Exploratory data analysis, Hansch approach and VolSurf formalism were applied to aid the ligand-based design of novel anti-T. cruzi agents. The best 2D-QSAR model showed suitable statistical measures [n = 18; s = 0.11; F = 42.19; R(2) = 0.90 and Q(2) = 0.77 (SDEP = 0.15)], and according to the optimum 3D-QSAR model [R(2) = 0.98, Q(2) = 0.93 (SDEP = 0.08)], three latent variables explained 62% of the total variance from original data. Steric and hydrophobic properties were pointed out as the key for biological activity. Based upon the findings, six novel benzofuroxan derivatives (4u-z) were designed, synthesized, and in vitro assayed to perform the QSAR external prediction. Then, the predictability for the both models, 2D-QSAR (Rpred(2) = 0.91) and 3D-QSAR (Rpred(2) = 0.77), was experimentally validated, and compound 4u was identified as the most active anti-T. cruzi hit (IC50 = 3.04 μM).
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Affiliation(s)
- Salomão Dória Jorge
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Departamento de Tecnologia Bioquímico Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof Lineu Prestes, 580, São Paulo, SP 05508-900, Brazil.
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Andres T, Eckmann L, Smith DK. Voltammetry of nitrobenzene with cysteine and other acids in DMSO. Implications for the biological reactivity of reduced nitroaromatics with thiols. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.01.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gál M, Sokolová R, Kolivoška V, Morovská Turoňová A, Ambrová M, Híveš J. Metronidazole radical anion formation studied by means of electrochemical impedance spectroscopy. ACTA ACUST UNITED AC 2012. [DOI: 10.1135/cccc2011113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Radiosensitizers belong to the most important class of the cancerostatic drugs. The electrochemical transfer of the first electron to the cytotoxic radiosensitizer Metronidazole (MET) and MET radical anion formation in aprotic medium was studied by means of electrochemical impedance spectroscopy. The heterogeneous electron transfer rate constant for the first reduction of MET (radical anion production) k0 for the redox couple was determined. Similarly, the diffusion coefficient of MET in dimethylformamide was also calculated by impedance measurements using expression for Warburg coefficient and Warburg plot. Moreover, the equivalent circuit for the redox couple MET/MET•– was proposed and its parameters were evaluated using a non-linear least square fitting. Our results, from the electrochemical point of view, also confirm the suitability of MET for the effective treatment of selected types of the cancer.
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Genotoxicity revaluation of three commercial nitroheterocyclic drugs: nifurtimox, benznidazole, and metronidazole. J Parasitol Res 2009; 2009:463575. [PMID: 20981287 PMCID: PMC2963127 DOI: 10.1155/2009/463575] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Revised: 07/09/2009] [Accepted: 08/03/2009] [Indexed: 12/28/2022] Open
Abstract
Nitroheterocyclic compounds are widely used as therapeutic agents against a variety of protozoan and bacterial infections. However, the literature on these compounds, suspected of being carcinogens, is widely controversial. In this study, cytotoxic and genotoxic potential of three drugs, Nifurtimox (NFX), Benznidazole (BNZ), and Metronidazole (MTZ) was re-evaluated by different assays. Only NFX reduces survival rate in actively proliferating cells. The compounds are more active for base-pair substitution than frameshift induction in Salmonella; NFX and BNZ are more mutagenic than MTZ; they are widely dependent from nitroreduction whereas microsomal fraction S9 weakly affects the mutagenic potential. Comet assay detects BNZ- and NFX-induced DNA damage at doses in the range of therapeutically treated patient plasma concentration; BNZ seems to mainly act through ROS generation whereas a dose-dependent mechanism of DNA damaging is suggested for NFX. The lack of effects on mammalian cells for MTZ is confirmed also in MN assay whereas MN induction is observed for NFX and BNZ. The effects of MTZ, that shows comparatively low reduction potential, seem to be strictly dependent on anaerobic/hypoxic conditions. Both NFX and BNZ may not only lead to cellular damage of the infective agent but also interact with the DNA of mammalian cells.
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Nogueira Silva JJ, Pavanelli WR, Salazar Gutierrez FR, Alves Lima FC, Ferreira da Silva AB, Santana Silva J, Wagner Franco D. Complexation of the anti-Trypanosoma cruzi Drug Benznidazole Improves Solubility and Efficacy. J Med Chem 2008; 51:4104-14. [DOI: 10.1021/jm701306r] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jean Jerley Nogueira Silva
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo (USP), São Carlos, SP, Brazil, Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Wander Rogério Pavanelli
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo (USP), São Carlos, SP, Brazil, Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Fredy R. Salazar Gutierrez
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo (USP), São Carlos, SP, Brazil, Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Francisco Chagas Alves Lima
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo (USP), São Carlos, SP, Brazil, Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Albérico Borges Ferreira da Silva
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo (USP), São Carlos, SP, Brazil, Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - João Santana Silva
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo (USP), São Carlos, SP, Brazil, Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Douglas Wagner Franco
- Departamento de Química e Física Molecular, Instituto de Química de São Carlos, Universidade de São Paulo (USP), São Carlos, SP, Brazil, Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil
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Argüello Da Silva J, Núñez Vergara L, Bollo S, Squella J. Voltammetric redox behavior of nitrofuryl 1,4-dihydropyridine derivatives: Interdependence between two redox centers. J Electroanal Chem (Lausanne) 2006. [DOI: 10.1016/j.jelechem.2006.03.034] [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]
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Mascarenhas RJ, Namboothiri IN, Sherigara BS, Reddy VK. A study of quasi reversible nitro radical anion from β-nitrostyrene at wax-impregnated carbon paste electrode. J CHEM SCI 2006. [DOI: 10.1007/bf02708288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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S�rgio?da?Silva?Juli�o M, Almeida �, Aquiles?La?Scalea M, Ferreira N, Compton R, Pires?Serrano S. Voltammetric Behavior of Nitrofurazone at Highly Boron Doped Diamond Electrode. ELECTROANAL 2005. [DOI: 10.1002/elan.200403093] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Argüello J, Núñez-Vergara L, Squella J. Electrogeneration of nitranion species from nitrofuryl substituted 1,4-dihydropyridine derivatives. Electrochem commun 2005. [DOI: 10.1016/j.elecom.2004.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Diab N, AbuZuhri A, Schuhmann W. Sequential-injection stripping analysis of nifuroxime using DNA-modified glassy carbon electrodes. Bioelectrochemistry 2003; 61:57-63. [PMID: 14642910 DOI: 10.1016/s1567-5394(03)00060-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The voltammetric behavior of nifuroxime was investigated comparing stationary voltammetric methods with the recently proposed sequential-injection stripping analysis (SISA), by using cyclic voltammetry (CV) and differential-pulse voltammetry at bare and DNA-modified glassy carbon (GC) electrodes. In cyclic voltammetry, reduction of nifuroxime at DNA-modified electrodes gives rise to a well-defined peak, and in contrast to bare GC surfaces, a re-oxidation peak could be observed. Optimization of the pre-concentration process at the DNA-modified surface led to a significant enhancement of the voltammetric current response, a better defined peak shape and an improved dynamic range. Based on this optimized voltammetric procedure, SISA has been evaluated for the determination of nifuroxime. The flow-system significantly facilitates the regeneration of the DNA-modified electrode surface, hence diminishing problems related to accumulation and memory effects. The linear detection range could be extended to 65 microM with a detection limit (3 s) of 0.68 microM, which corresponds to an absolute amount of 21 ng nifuroxime.
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Affiliation(s)
- Nizam Diab
- Lehrstuhl fur Analytische Chemie, Ruhr-Universität Bochum, Universitatsstr 150, AG Elektroanalytik und Sensorik, D-44780 Bochum, Germany
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Mahal HS, Rath MC, Mukherjee T. Pulse-radiolysis studies of nimesulide in aqueous solution: effect of microheterogeneous media. RESEARCH ON CHEMICAL INTERMEDIATES 2003. [DOI: 10.1163/156856703322149044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Squella J, Huerta M, Bollo S, Pessoa H, Núñez-Vergara L. Electrochemical reduction of nitrotetralones. J Electroanal Chem (Lausanne) 1997. [DOI: 10.1016/s0022-0728(96)04819-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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