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Sadowska-Bartosz I, Bartosz G. The Cellular and Organismal Effects of Nitroxides and Nitroxide-Containing Nanoparticles. Int J Mol Sci 2024; 25:1446. [PMID: 38338725 PMCID: PMC10855878 DOI: 10.3390/ijms25031446] [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: 12/21/2023] [Revised: 01/21/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
Nitroxides are stable free radicals that have antioxidant properties. They react with many types of radicals, including alkyl and peroxyl radicals. They act as mimics of superoxide dismutase and stimulate the catalase activity of hemoproteins. In some situations, they may exhibit pro-oxidant activity, mainly due to the formation of oxoammonium cations as products of their oxidation. In this review, the cellular effects of nitroxides and their effects in animal experiments and clinical trials are discussed, including the beneficial effects in various pathological situations involving oxidative stress, protective effects against UV and ionizing radiation, and prolongation of the life span of cancer-prone mice. Nitroxides were used as active components of various types of nanoparticles. The application of these nanoparticles in cellular and animal experiments is also discussed.
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Affiliation(s)
- Izabela Sadowska-Bartosz
- Laboratory of Analytical Biochemistry, Institute of Food Technology and Nutrition, College of Natural Sciences, University of Rzeszow, 4 Zelwerowicza Street, 35-601 Rzeszow, Poland;
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2
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Bujak-Pietrek S, Pieniazek A, Gwozdzinski K, Gwozdzinski L. The Effect of Piperidine Nitroxides on the Properties of Metalloproteins in Human Red Blood Cells. Molecules 2023; 28:6174. [PMID: 37630426 PMCID: PMC10459006 DOI: 10.3390/molecules28166174] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/14/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
Nitroxides are stable, low molecular-weight radicals containing a nitroxide group that has an unpaired electron. The presence of a nitroxide group determines their redox properties. The effect of the piperidine nitroxides, Tempo, Tempol, and Tempamine, on metalloproteins (hemoglobin, superoxide dismutase, catalase) and lactate dehydrogenase in red blood cells was investigated in this research. In addition, the level of lipid peroxidation and the level of protein carbonyl groups were examined as indicators of the effect of oxidative stress. Nitroxides increased superoxide dismutase activity and oxidized hemoglobin to methemoglobin, and also slightly decreased the catalase activity of red blood cells treated with nitroxides. Tempol significantly decreased lactate dehydrogenase activity. All three nitroxides had no effect on membrane lipid peroxidation and protein oxidation. Our results confirm that nitroxides have both antioxidant and prooxidative effects in human red blood cells. The piperidine nitroxides do not initiate the oxidation of proteins and lipids in the membranes of human red blood cells.
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Affiliation(s)
- Stella Bujak-Pietrek
- Department of Physical Hazards, Nofer Institute of Occupational Medicine, 91-348 Lodz, Poland;
| | - Anna Pieniazek
- Department of Oncobiology and Epigenetics, Faculty of Biology and Environmental Protection, University of Lodz, 90-236 Lodz, Poland; (A.P.); (K.G.)
| | - Krzysztof Gwozdzinski
- Department of Oncobiology and Epigenetics, Faculty of Biology and Environmental Protection, University of Lodz, 90-236 Lodz, Poland; (A.P.); (K.G.)
| | - Lukasz Gwozdzinski
- Department of Pharmacology and Toxicology, Medical University of Lodz, 90-752 Lodz, Poland
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3
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Mołoń M, Szlachcikowska D, Stępień K, Kielar P, Galiniak S. Two faces of TEMPO (2,2,6,6-tetramethylpiperidinyl-1-oxyl) - An antioxidant or a toxin? BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119412. [PMID: 36529401 DOI: 10.1016/j.bbamcr.2022.119412] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/04/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022]
Abstract
2,2,6,6-Tetramethylpiperidine-1-oxyl, commonly known as TEMPO, is one of the compounds called nitroxides that are used in the chemical industry for synthesis of many organic compounds as well as for electrodes in all-organic radical batteries. Additionally, TEMPO is a widely used antioxidant in scientific studies. Technological progress and simultaneous care for the environment leads to resorting to new industrial methods which require the use of compounds that have not been fully tested for their impact on living organisms. Therefore, TEMPO may be an environmental pollutant and its effect on living organisms is not fully understood. The aim of our study was to determine the influence of TEMPO on the physiology, chronological lifespan and wide transcription changes of a eukaryotic model organism, namely the Saccharomyces cerevisiae yeast. For this purpose, we used the BY4741 wild-type and isogenic mutants with a disorder in the response to oxidative stress (sod1Δ, sod2Δ, yap1Δ) and repair of DNA damage (rad52Δ). We showed that supplementation with TEMPO inhibited the cell growth rate of all analyzed strains while simultaneously slowing down the aging of post-mitotic cells in the yeast population. In addition, TEMPO-treated yeast cells manifested a significantly increased level of metabolism in the wild-type and sod2Δ strains. TEMPO also displayed genoprotective effect by reducing the number of DNA double-strand breaks in cells. Here, we are the first to show the widespread effect of TEMPO on yeast. In conclusion, we have shown that, contrary to the commonly accepted notion, TEMPO has also a toxic effect, especially on active mitotic cells. We hypothesize that translation impairment or ribosome biogenesis disorder is likely to be considered secondary effects of TEMPO toxicity related to cell cycle arrest. Therefore, despite the growing interest in the use of this compound in the chemical industry, its toxic effect on the environment, especially biosphere, should be taken into account.
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Affiliation(s)
- Mateusz Mołoń
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland.
| | - Dominika Szlachcikowska
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland
| | - Karolina Stępień
- Institute of Medical Sciences, Medical College of Rzeszów University, Rzeszów University, Rzeszów, Poland
| | - Patrycja Kielar
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland
| | - Sabina Galiniak
- Institute of Medical Sciences, Medical College of Rzeszów University, Rzeszów University, Rzeszów, Poland.
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Gurská M, Brezová V, Šalitroš I, Švorc Ľ, Špánik I, Moncoľ J, Pavlik J, Szolcsányi P. Polyradical PROXYL/TEMPO Conjugates Connected by Ester/Amide Bridges: Synthesis, Physicochemical Studies, and DFT Calculations. Chempluschem 2021; 86:396-405. [PMID: 33645915 DOI: 10.1002/cplu.202000803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/11/2021] [Indexed: 12/16/2022]
Abstract
A series of di-/trinitroxide esters and amides featuring PROXYL and/or TEMPO radicals connected with alicyclic bridges were prepared in 61-92 % yields and their properties were analysed by using multiple experimental techniques. The examination of EPR spectra of radicals in organic solvents augmented with DFT calculations brought valuable information on the conformational dynamics and spin exchange mechanisms. Cyclic voltammetry investigations revealed (quasi)reversible electrochemical behaviour of studied nitroxides with their half-wave potentials ranging from -51 to -17 mV. SQUID measurements of selected radicals revealed that the magnetism of di- and trinitroxides is significantly different, since antiferromagnetic coupling in biradicals is notably larger than in triradicals. The single-crystal X-ray analysis of selected biradicals revealed the existence of 3D supramolecular networks of molecules linked through hydrogen-bonding interactions. These polynitroxide radicals can serve as promising bridging or chelating ligands in the synthesis of transition-metal-based molecular magnets.
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Affiliation(s)
- Mária Gurská
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 41, Bratislava, Slovak Republic
| | - Vlasta Brezová
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ivan Šalitroš
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46, Olomouc, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 61200, Brno, Czech Republic
| | - Ľubomír Švorc
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic.,Department of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK-974 00, Banská Bystrica, Slovak Republic
| | - Ivan Špánik
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ján Moncoľ
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Ján Pavlik
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
| | - Peter Szolcsányi
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovak Republic
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Sun HJ, Lee WT, Leng B, Wu ZY, Yang Y, Bian JS. Nitroxyl as a Potential Theranostic in the Cancer Arena. Antioxid Redox Signal 2020; 32:331-349. [PMID: 31617376 DOI: 10.1089/ars.2019.7904] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Significance: As one-electron reduced molecule of nitric oxide (NO), nitroxyl (HNO) has gained enormous attention because of its novel physiological or pharmacological properties, ranging from cardiovascular protective actions to antitumoricidal effects. Recent Advances: HNO is emerging as a new entity with therapeutic advantages over its redox sibling, NO. The interests in the chemical, pharmacological, and biological characteristics of HNO have broadened our current understanding of its role in physiology and pathophysiology. Critical Issues: In particular, the experimental evidence suggests the therapeutic potential of HNO in tumor pharmacology, such as neuroblastoma, gastrointestinal tumor, ovarian, lung, and breast cancers. Indeed, HNO donors have been demonstrated to attenuate tumor proliferation and angiogenesis. Future Directions: In this review, the generation and detection of HNO are outlined, and the roles of HNO in cancer progression are further discussed. We anticipate that the completion of this review might give novel insights into the roles of HNO in cancer pharmacology and open up a novel field of cancer therapy based on HNO.
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Affiliation(s)
- Hai-Jian Sun
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Wei-Thye Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Bin Leng
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Zhi-Yuan Wu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yong Yang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, Center for New Drug Safety Evaluation and Research, China Pharmaceutical University, Nanjing, China
| | - Jin-Song Bian
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,National University of Singapore (Suzhou) Research Institute, Suzhou, China
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6
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Morita M, Naito Y, Itoh Y, Niki E. Comparative study on the plasma lipid oxidation induced by peroxynitrite and peroxyl radicals and its inhibition by antioxidants. Free Radic Res 2019; 53:1101-1113. [DOI: 10.1080/10715762.2019.1688799] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Mayuko Morita
- Gastrointestinal Immunology, Kyoto Prefectural University of Medicine, Kyoto, Japan
- Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuji Naito
- Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoshito Itoh
- Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Etsuo Niki
- Research Center for Advanced Science and Technology, University of Tokyo, Komaba, Japan
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7
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Encapsulation of tissue plasminogen activator in pH-sensitive self-assembled antioxidant nanoparticles for ischemic stroke treatment – Synergistic effect of thrombolysis and antioxidant –. Biomaterials 2019; 215:119209. [DOI: 10.1016/j.biomaterials.2019.05.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 05/07/2019] [Accepted: 05/10/2019] [Indexed: 12/18/2022]
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8
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Kobakhidze A, Elisashvili V, Corvini PFX, Čvančarová M. Biotransformation of ritalinic acid by laccase in the presence of mediator TEMPO. N Biotechnol 2018; 43:44-52. [DOI: 10.1016/j.nbt.2017.08.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 07/20/2017] [Accepted: 08/15/2017] [Indexed: 01/19/2023]
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Poprac P, Poliak P, Kavala M, Barbieriková Z, Zalibera M, Fronc M, Švorc Ľ, Vihonská Z, Olejníková P, Lušpai K, Lukeš V, Brezová V, Szolcsányi P. Polyradical PROXYL/TEMPO-Derived Amides: Synthesis, Physicochemical Studies, DFT Calculations, and Antimicrobial Activity. Chempluschem 2017; 82:1326-1340. [PMID: 31957189 DOI: 10.1002/cplu.201700343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 10/18/2017] [Indexed: 01/09/2023]
Abstract
A series of polynitroxide amides possessing 2,2,5,5-tetramethyl-1-pyrrolidinyloxy (PROXYL) and/or 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) units connected through various bridges were synthesized and their properties were analyzed. EPR spectroscopy provided detailed insight into their paramagnetic character and related properties. A thorough examination of the EPR spectra of dinitroxides in organic solvents provided valuable information on the intramolecular motions, thermodynamics, and spin-exchange mechanisms. Analysis of low-temperature X- and Q-band EPR spectra of the dissolved dinitroxides provided spin-spin distances that were comparable with the theoretical values obtained by DFT. Cyclic voltammetry investigations revealed (quasi)reversible electrochemical behavior for PROXYL-derived biradicals, whereas significant loss of the reversibility was found for TEMPO-containing bi- and polyradicals. The inhibitory activities of the nitroxides against model bacteria, yeasts, and filamentous fungi were assessed.
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Affiliation(s)
- Patrik Poprac
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Peter Poliak
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Miroslav Kavala
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Zuzana Barbieriková
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Michal Zalibera
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Marek Fronc
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Ľubomír Švorc
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Zuzana Vihonská
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Petra Olejníková
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Karol Lušpai
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Vladimír Lukeš
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Vlasta Brezová
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
| | - Peter Szolcsányi
- Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, SK-812 37, Bratislava, Slovakia
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Kantar A, Porcelli F, Fiocchi A, Fedeli D, Marconi A, Falcioni G. Flunisolide attenuates nitric oxide-induced DNA damage in rat trachea epithelial cells. ACTA ACUST UNITED AC 2016; 5:219-24. [PMID: 16696591 DOI: 10.2165/00151829-200605030-00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
In asthma the bronchial epithelium is highly abnormal, with various structural changes. As a consequence, the epithelium becomes an important source of inflammatory mediators that contribute to the ongoing inflammation and remodeling responses occurring in asthma. Compared with normal individuals, the fraction of exhaled nitric oxide (NO) is elevated in patients with asthma, and these levels have been shown to vary with disease activity. Thus, in asthma, epithelial cells may be exposed to large amounts of NO. Increased NO production is associated with the formation of various nitrosating species capable of promoting DNA damage. In this study we investigated the effect of NO on DNA of rat trachea epithelial cells in the presence or absence of flunisolide. Rat airway epithelial cells were prepared and incubated with the NO donor S-nitroso-L-glutathione monoethyl ester (GSNO-MEE). DNA damage was evaluated using single cell gel electrophoresis 'comet assay.' The parameters used as an index of DNA damage were tail length, tail intensity, and tail moment. Results of our study demonstrated that NO induced significant DNA damage in rat airway epithelial cells. Flunisolide in amounts of 11-110 mumol/L significantly reduced all the considered parameters indicating DNA damage. These data indicate that flunisolide may protect epithelial cells from the NO-mediated DNA damage. NO overproduction could contribute to epithelial injury in asthma, and flunisolide seems to attenuate this damage.
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Affiliation(s)
- Ahmad Kantar
- Division of Pediatric Medicine, Policlinico San Pietro, Ponte San Pietro, Bergamo, Italy
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11
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Nitroxide antioxidant as a potential strategy to attenuate the oxidative/nitrosative stress induced by hydrogen peroxide plus nitric oxide in cultured neurons. Nitric Oxide 2016; 54:38-50. [DOI: 10.1016/j.niox.2016.02.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/19/2016] [Accepted: 02/10/2016] [Indexed: 01/31/2023]
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12
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Zhang Y, Guo J, Zeng L, Zhang J, Hui Y, Liu J, Qing X, Sun X, Guo G. Tert-butyl-2(4,5-dihydrogen-4,4,5,5-tetramethyl-3-O-1H-imidazole-3-cationic-1-oxyl-2-pyrrolidine-1-carboxylic ester displays novel cytotoxicity through reactive oxygen species-mediated oxidative damage in MCF-7 and MDA-MB-231 cells. Chem Biol Interact 2011; 192:287-97. [PMID: 21536016 DOI: 10.1016/j.cbi.2011.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 04/15/2011] [Accepted: 04/16/2011] [Indexed: 01/29/2023]
Abstract
The cytotoxicity of a new nitroxyl nitroxide radical, tert-butyl-2 (4,5-dihydrogen-4,4,5,5-tetramethyl-3-O-1H-imidazole-3-cationic-1-oxyl-2-pyrrolidine-1-carboxylic ester (L-NNP) was examined in MCF-7 and MDA-MB-231 cells. L-NNP treatment resulted in a significant growth inhibition in MCF-7 and MDA-MB-231 cells. Compared with control, 10, 30, and 50μg/ml L-NNP treatments for 48h induced significant cell and nuclei swelling, and organelle distension. The marked cell death was seen in a concentration- and time-dependant manner in L-NNP treated groups. The L-NNP treated group displayed a concentration-dependant increase in DNA double strand damage compared to the control and the 1Gy γ-rays exposure groups. These results suggest that L-NNP could result in more lethal genotoxicity than 1Gy γ-radiation. Based on mitochondrial alteration (membrane potential loss and SDH activity descend), DNA damage, an increase in MDA production, and GSH-PX inactivation, we predicate that L-NNP induces lipid oxidation and oxidative damage in MCF-7 and MDA-MB-231 cells. Since L-NNP initiated a significant increase in reactive oxygen species, which could largely be inhibited by NAC pretreatment, the overall data strongly suggest that the mechanism of cytotoxicity of L-NNP was its ability to act as a strong free radical, and significantly increase intracellular reactive oxygen species production. This led to intracellular oxidative damage, and antioxidant enzyme inactivation, resulting in cell death. We hypothesize that the greater cytotoxicity of L-NNP in MDA-MB-231 cells than in MCF-7 cells might be due to more ROS production in MDA-MB-231 cells, leading to more oxidative damage.
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Affiliation(s)
- Yanjun Zhang
- Department of Radiological Medicine, Fourth Military Medical University, No. 17 Changle West Road Xi'an, Shaanxi, PR China
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Lewinska A, Bilinski T, Bartosz G. Limited Effectiveness of Antioxidants in the Protection of Yeast Defective in Antioxidant Proteins. Free Radic Res 2009; 38:1159-65. [PMID: 15621692 DOI: 10.1080/10715760400009860] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Efficacy of several antioxidants in the protection of the yeast Saccharomyces cerevisiae mutants deficient in CuZnSOD and deficient in glutaredoxin 5 to growth restriction induced by oxidants was studied. Ascorbate and glutathione protected the Deltasod1 and Deltagrx5 mutants against the effects of t-butyl hydroperoxide and cumene hydroperoxide, Deltasod1 mutants against oxytetracycline and Deltagrx5 mutants against menadione and 2,2'-azobis-(2-amidinopropane). However, Tempol, Trolox and melatonin were much less effective, showing prooxidative effects and, at high concentrations, hampering the growth of the mutants in the absence of exogenous oxidants. These results point to a complication of cellular effects of antioxidants by their prooxidative effects and to the usefulness of cellular tests to evaluate the biological effectiveness of antioxidants.
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Affiliation(s)
- Anna Lewinska
- Department of Biochemistry and Cell Biology, University of Rzeszów, ul. Cegielniana 12, PL 35-595 Rzeszów, Poland
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14
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Yasukawa K, Miyakawa R, Yao T, Tsuneyoshi M, Utsumi H. Non-invasive monitoring of redox status in mice with dextran sodium sulphate-induced colitis. Free Radic Res 2009; 43:505-13. [PMID: 19353419 DOI: 10.1080/10715760902883036] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Change of redox status is associated with colitis induced by dextran sodium sulphate (DSS). This study monitored redox status in DSS-induced colitis in mice using in vivo electron spin resonance (ESR) spectroscopy with nitroxyl probes. Colitis was induced in male ICR mice by supplementing their drinking water with 3% DSS for 3, 5 or 7 days. The ESR signal decay rate of carbamoyl-PROXYL administered into the rectum was enhanced by DSS treatment and the enhancement on day 7 was suppressed by membrane-permeable antioxidants, tiron and dimethylsulphoxide and a membrane-impermeable antioxidant, mannitol. The enhancement on day 5 was suppressed by tiron and dimethylsulphoxide, while that on day 3 was inhibited only by tiron. These results suggest that redox change occurs in or around of epithelial cells on day 7, but only intracellularly on day 5, and that redox change such as generation of less reactive radicals occurs only intracellularly on day 3.
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Affiliation(s)
- Keiji Yasukawa
- Department of Bio-functional Science, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
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15
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Sobol Z, Cook NM, Schiestl RH. HNO induces DNA deletions in the yeast S. cerevisiae. Mutat Res 2008; 638:83-89. [PMID: 17963796 DOI: 10.1016/j.mrfmmm.2007.08.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2007] [Revised: 08/25/2007] [Accepted: 08/31/2007] [Indexed: 05/25/2023]
Abstract
HNO is genotoxic but its mechanism is not well understood. There are many possible mechanisms by which HNO can attack DNA. Since HNO is electrophilic, it may react with exocyclic amine groups on DNA bases and through a series of subsequent reactions form a deaminated product. Alternatively, HNO may induce radical chemistry through O(2)-dependent (or possibly O(2)-independent) chemistry. In cell free systems, experiments have shown that HNO does react with DNA, resulting in base oxidation and strand cleavage. In this study, we used a whole-cell system in the yeast Saccharomyces cerevisiae to study the mechanism of HNO induced DNA damage with Angeli's salt as HNO donor. The yeast DEL assay provided a measure of intrachromosomal recombination leading to DNA deletions. We also examined interchromosomal recombination leading to genomic rearrangements and used the canavanine (CAN) assay to study induction of forward point mutations. HNO was a potent inducer of DNA deletions and recombination but it was negative for induction of point mutations. This suggests that HNO causes DNA strand breaks rather than base damage. Genotoxicity was observed under aerobic and anaerobic conditions and NAC protected against HNO induced DNA deletions. Since HNO is genotoxic under anaerobic conditions, NAC probably protected against radicals generated by HNO independent of oxygen.
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Affiliation(s)
- Zhanna Sobol
- Department of Pathology, Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA
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Paolocci N, Jackson MI, Lopez BE, Tocchetti CG, Wink DA, Hobbs A, Fukuto JM. The pharmacology of nitroxyl (HNO) and its therapeutic potential: not just the Janus face of NO. Pharmacol Ther 2007; 113:442-58. [PMID: 17222913 PMCID: PMC3501193 DOI: 10.1016/j.pharmthera.2006.11.002] [Citation(s) in RCA: 198] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Accepted: 11/10/2006] [Indexed: 11/29/2022]
Abstract
Nitroxyl (HNO), the 1-electron reduced and protonated congener of nitric oxide (NO), has received recent attention as a potential pharmacological agent for the treatment of heart failure and as a preconditioning agent for the mitigation of ischemia-reperfusion injury. Interest in the pharmacology and biology of HNO has prompted examination, or in some instances reexamination, of many of its chemical properties. Such studies have provided insight into the chemical basis for the biological effects of HNO, although the biochemical mechanisms for many of these effects remain to be established. In this review, a brief description of the biologically relevant chemistry of HNO is given, followed by a more detailed discussion of the pharmacology and potential toxicology of HNO.
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Affiliation(s)
- Nazareno Paolocci
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD 21287
| | - Matthew I. Jackson
- Interdepartmental Program in Molecular Toxicology, UCLA School of Public Health, Los Angeles, CA, 90095-1772
| | - Brenda E. Lopez
- Department of Pharmacology, UCLA School of Medicine, Center for the Health Sciences, Los Angeles, CA 90095-1735
| | - Carlo G. Tocchetti
- Division of Cardiology, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD 21287
| | - David A. Wink
- Radiation Biology Branch, National Cancer Institute Bethesda, MD 20892
| | - Adrian Hobbs
- Wolfson Institute for Biomedical Research, University College, Cruciform Building, Gower Street, London, WC1E 6AE, UK
| | - Jon M. Fukuto
- Interdepartmental Program in Molecular Toxicology, UCLA School of Public Health, Los Angeles, CA, 90095-1772
- Department of Pharmacology, UCLA School of Medicine, Center for the Health Sciences, Los Angeles, CA 90095-1735
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Stipa P. A multi-step procedure for evaluating the EPR parameters of indolinonic aromatic aminoxyls: A combined DFT and spectroscopic study. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.10.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Gabbianelli R, Falcioni G, Lupidi G, Greci L, Damiani E. Fluorescence study on rat epithelial cells and liposomes exposed to aromatic nitroxides. Comp Biochem Physiol C Toxicol Pharmacol 2004; 137:355-62. [PMID: 15228954 DOI: 10.1016/j.cca.2004.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2003] [Revised: 03/12/2004] [Accepted: 03/13/2004] [Indexed: 10/26/2022]
Abstract
This study was performed to evaluate the effects, if any, of aromatic nitroxides, namely, indolinic nitroxides, on membrane fluidity of rat epithelial cells using steady-state fluorescence. These nitroxides are being increasingly considered as new and versatile compounds to reduce oxidative stress in biological systems. Hence, the results obtained in this study will give more insights on the interaction of these compounds with biological structures which at present is lacking, especially in view of their possible application as antioxidant therapeutic agents. The probes DPH and Laurdan which give information on the hydrophobic and hydrophilic-hydrophobic regions of the membrane bilayer, respectively, showed that nitroxide 1 (1,2-dihydro-2-methyl-3H-indole-3-one-1-oxyl) significantly increases membrane fluidity, whereas the corresponding phenylimino nitroxide derivative 2 (1,2-dihydro-2-methyl-3H-indole-3-phenylimino-1-oxyl) leads to membrane rigidification. The aliphatic nitroxide TEMPO included in this study for comparison produced no modifications. Consequently, it appears that the structure of the heterocyclic rings (aromatic or aliphatic) and the substituents may affect membrane fluidity differently.
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Affiliation(s)
- Rosita Gabbianelli
- Dipartimento di Biologia M.C.A., Università di Camerino, Via Camerini, 2, 62032 Camerino, Italy.
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Pellei M, Lobbia GG, Santini C, Spagna R, Camalli M, Fedeli D, Falcioni G. Synthesis, characterization and antioxidant activity of new copper(i) complexes of scorpionate and water soluble phosphane ligands. Dalton Trans 2004:2822-8. [PMID: 15514771 DOI: 10.1039/b407061e] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New copper(I) complexes have been synthesised from the reaction of CuCl with potassium hydrotris(4-bromo-1H-pyrazol-1-yl)borate, KTp4Br or lithium bis(3,5-dimethylpyrazol-1-yl)acetate, Li[L2CO2] ligands and 4- or 2-(diphenylphosphane)benzoic acid or tris(m-sulfonatophenyl)posphine trisodium salt (TPPTS) coligands. The complexes obtained have been characterized by elemental analyses and FT-IR in the solid state, and by NMR (1H and 31P[1H]) and electrospray mass spectrometry (ESI-MS) in solution. Single crystal structural characterisation was undertaken for the [Cu[PPh2(4-C6H4COOH)](Tp4Br)] derivative, an interesting dimeric supramolecular assembly. A chemiluminescence study has demonstrated the superoxide scavenging activity of these new copper complexes. The Comet assay was used to evaluate the impairment of DNA in rat epithelial cells exposed to different reactive nitrogen species. In addition, the same complexes were included in this study to determine their efficacy as antioxidants in mitigating oxidative DNA damage. The parameter tail moment, used as an index of DNA damage, showed that the complex [Cu[PPh2(4-C6H4COOH)](Tp4Br)] remarkably inhibited DNA strand breaks induced by the different nitrogen oxide species. The other copper complexes under study showed a different ability to reduce tail moment values depending on the type of RNOS donor used.
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Affiliation(s)
- Maura Pellei
- Dipartimento di Scienze Chimiche Universitá di Camerino, MC, Italy
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