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Ksendzova GA, Ostrovskaya NI, Sorokin VL, Shadyro OI. Effects of Cycloaminomethyl Derivatives of Sterically Hindered Dihydroxybenzenes on Radiation-Induced Reactions Involving Peroxyl and Alkyl Radicals. High Energy Chem 2022. [DOI: 10.1134/s0018143922050083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Urbanovich OV, Davydenko AI, Panteleeva EA, Sverdlov RL, Shadyro OI. Radiation-Induced Dehydration and Destruction of 1,2-Propanediol, 1,2-Butanediol, and 2,3-Butanediol in Deaerated Aqueous Solutions. High Energy Chem 2022. [DOI: 10.1134/s0018143922030122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Brinkevich SD, Maliborskii AY, Melnichuk ME, Sverdlov RL, Grigor’ev YV, Shadyro OI. Effects of Imidazole and Its Derivatives on Radiation-Induced Dephosphorylation of Glycero-1-Phosphate in Deaerated Aqueous Solutions. High Energy Chem 2021. [DOI: 10.1134/s0018143921020053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Brinkevich SD, Maliborskii AY, Kapusto IA, Sverdlov RL, Grigor’ev YV, Shadyro OI. Effect of Nitro Derivatives of 1,2,4-Triazole on the Radiation-Induced Oxidation of Ethanol. High Energy Chem 2021. [DOI: 10.1134/s0018143921010069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Brinkevich SD, Tuhai OV, Sladkova AA, Shadyro OI. Radiation-Induced Transformations of 2-Fluoroethanol in Aqueous Solutions. High Energy Chem 2020. [DOI: 10.1134/s001814392006003x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Brinkevich SD, Kuzmuk DA, Sverdlov RL, Shadyro OI. Radiation-Induced Transformations of Tryptophan and Its Derivatives in Oxygenated Ethanol. High Energy Chem 2020. [DOI: 10.1134/s001814391906002x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Shadyro OI, Sorokin VL, Ksendzova GA, Savinova OV, Samovich SN, Boreko EI. Comparative Evaluation of the Antiherpes Activity of Compounds with Different Mechanisms of Action. Pharm Chem J 2019. [DOI: 10.1007/s11094-019-02055-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Krylova NG, Drobysh MS, Semenkova GN, Kulahava TA, Pinchuk SV, Shadyro OI. Cytotoxic and antiproliferative effects of thymoquinone on rat C6 glioma cells depend on oxidative stress. Mol Cell Biochem 2019; 462:195-206. [PMID: 31493190 DOI: 10.1007/s11010-019-03622-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 02/23/2019] [Indexed: 01/01/2023]
Abstract
Thymoquinone (TQ) is a highly perspective chemotherapeutic agent against gliomas and glioblastomas because of its ability to cross the blood-brain barrier and its selective cytotoxicity for glioblastoma cells compared to primary astrocytes. Here, we tested the hypothesis that TQ-induced mild oxidative stress provokes C6 glioma cell apoptosis through redox-dependent alteration of MAPK proteins. We showed that low concentrations of TQ (20-50 μM) promoted cell-cycle arrest and induced hydrogen peroxide generation as a result of NADH-quinone oxidoreductase 1-catalyzed two-electron reduction of this quinone. Similarly, low concentrations of TQ efficiently conjugated intracellular GSH disturbing redox state of glioma cells and provoking mitochondrial dysfunction. We demonstrated that high concentrations of TQ (70-100 μM) induced reactive oxygen species generation due to its one-electron reduction. TQ provoked apoptosis in C6 glioma cells through mitochondrial potential dissipation and permeability transition pore opening. The identified TQ modes of action on C6 glioma cells open up the possibility of considering it as a promising agent to enhance the sensitivity of cancer cells to standard chemotherapeutic drugs.
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Affiliation(s)
- N G Krylova
- Department of Biophysics, Faculty of Physics, Belarusian State University, 4 Nezavisimosti ave., 220030, Minsk, Belarus
| | - M S Drobysh
- Department of Radiation Chemistry and Pharmaceutical Technologies, Faculty of Chemistry, Belarusian State University, 14 Leningradskaya st., 220030, Minsk, Belarus
| | - G N Semenkova
- Department of Radiation Chemistry and Pharmaceutical Technologies, Faculty of Chemistry, Belarusian State University, 14 Leningradskaya st., 220030, Minsk, Belarus
| | - T A Kulahava
- Department of Biophysics, Faculty of Physics, Belarusian State University, 4 Nezavisimosti ave., 220030, Minsk, Belarus.
| | - S V Pinchuk
- Institute of Biophysics and Cell Engineering of National Academy of Sciences of Belarus, 27 Academicheskaya st., 220072, Minsk, Belarus
| | - O I Shadyro
- Department of Radiation Chemistry and Pharmaceutical Technologies, Faculty of Chemistry, Belarusian State University, 14 Leningradskaya st., 220030, Minsk, Belarus
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Amaegberi NV, Semenkova GN, Lisovskaya AG, Kvacheva ZB, Shadyro OI. Modification of Redox Processes in C6 Glioma Cells by 2-Hexadeсenal, the Product of Sphingolipid Destruction. Biophysics (Nagoya-shi) 2019. [DOI: 10.1134/s0006350919030023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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10
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Ksendzova GA, Ostrovskaya NI, Semenkova GN, Sorokin VL, Shishkanova PA, Shadyro OI. Synthesis of 3,5-Di-tert-butyl-1,2-dihydroxybenzene Derivatives and Their Effect on Free-Radical Oxidation of Hexane and Oxygen Activation Ability of Neutrophils. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219030046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Brinkevich SD, Maliborskii AY, Kapusto IA, Sverdlov RL, Grigor’ev YV, Ivashkevich OA, Shadyro OI. Interaction of 1,2,4-Triazole Nitro Derivatives with α-Hydroxyethyl Radicals: A Steady-State Radiolysis Study. High Energy Chem 2019. [DOI: 10.1134/s0018143919020036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Brinkevich SD, Shadyro OI. Interaction of Oxygen-Centered Radicals with 5,6-O-Isopropylidyl-2,3-O-Dimethylascorbic Acid. High Energy Chem 2018. [DOI: 10.1134/s0018143918040057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Lisovskaya AG, Procenko KO, Shadyro OI. Photochemical transformations of sphingosine and serinol in aqueous and ethanol solutions. High Energy Chem 2017. [DOI: 10.1134/s0018143917050071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Martinovich GG, Martinovich IV, Vcherashniaya AV, Shadyro OI, Cherenkevich SN. Thymoquinone, a biologically active component of Nigella sativa, induces mitochondrial production of reactive oxygen species and programmed death of tumor cells. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350916060154] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Shadyro OI, Sorokin VL, Ksendzova GA, Savinova OV, Samovich SN, Pavlova NI, Polozov GI, Boreko EI. Synthesis and Antiviral Activity of Hydroxy-Substituted Benzaldehydes and Related Compounds. Pharm Chem J 2016. [DOI: 10.1007/s11094-016-1414-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sverdlov RL, Khrishchanovich AV, Brinkevich SD, Shadyro OI. Interaction of tryptophan and its derivatives with oxygen- and nitrogen-centered radicals. High Energy Chem 2015. [DOI: 10.1134/s0018143915020101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Brinkevich SD, Reztsov IA, Shadyro OI. Reactions of cyclopentanone, γ-butyrolactone, and their derivatives with α-hydroxyethyl radicals. High Energy Chem 2014. [DOI: 10.1134/s0018143914050051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Sverdlov RL, Brinkevich SD, Shadyro OI. Interaction of tryptophan and related compounds with oxygen- and carbon-centered radicals. Free Radic Res 2014; 48:1200-5. [DOI: 10.3109/10715762.2014.944181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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19
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Brinkevich SD, Sverdlov RL, Shadyro OI. Effects of indole and imidazole derivatives on the radiation- and peroxide-induced transformations of ethanol. High Energy Chem 2012. [DOI: 10.1134/s0018143913010037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Sorokina YM, Sladkova AA, Popova LA, Shadyro OI, Knizhnikov VA. Synthesis of dipeptides based on valine and threonine. Russ J Org Chem 2012. [DOI: 10.1134/s1070428012100065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Lisovskaya AG, Sladkova AA, Sosnovskaya AA, Shadyro OI. Reactions of aminyl radicals during radiolysis and photolysis of aqueous solutions of amino alcohols and their derivatives. High Energy Chem 2012. [DOI: 10.1134/s0018143912040121] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Sladkova AA, Sosnovskaya AA, Edimecheva IP, Knizhnikov VA, Shadyro OI. Radiation-induced degradation of hydroxyl-containing amino acids in aqueous solutions. High Energy Chem 2012. [DOI: 10.1134/s0018143912040169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Potapovich MV, Metelitsa DI, Shadyro OI. [Antioxidant activity of hydroxy derivatives of coumarin]. Prikl Biokhim Mikrobiol 2012; 48:282-288. [PMID: 22834298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The inhibition efficiency (antioxidant activity) of hydroxy derivatives of coumarin, such as esculetin, dicumarol, and fraxetin, was studied in the methemalbumin-H2O2-tetramethylbenzidine (TMB) pseudoperoxidase system at 20 degrees C in a buffered physiological solution (pH 7.4) containing 6% DMF and 0.25% DMSO. The inhibitor's efficiency was quantitatively characterized by the inhibition constants (K(i), microM) and the inhibition degree (%). The K(i) values for esculetin, dicumarol, and fraxetin were 9.5, 15, and 26 microM, respectively. Esculetin and fraxetin inhibited pseudoperoxidase oxidation of TMB in a noncompetitive manner; dicumarol, in a mixed manner. The inhibiting activity ofesculetin in peroxidase-catalyzed TMB oxidation at pH 6.4 is characterized by a K(i) value equal to 1.15 microM, and the inhibition process is competitive. Esculetin was found to be the most effective antioxidant of plant origin among all derivatives previously studied in model biochemical systems.
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Brinkevich SD, Samovich SN, Shadyro OI. Reactions of α-hydroxyethyl radicals with the derivatives of benzyl alcohol, benzaldehyde, and benzoic acid, as studied by continuous radiolysis. High Energy Chem 2011. [DOI: 10.1134/s0018143911060075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Brinkevich SD, Sverdlov RL, Lagutin PY, Shadyro OI. Effects of B vitamins on the radiation-induced transformations of hydroxyl-containing organic compounds. High Energy Chem 2011. [DOI: 10.1134/s0018143911050043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Potapovich MV, Kurchenko VP, Metelitsa DI, Shadyro OI. [Antioxidant activity of oxygen-containing aromatic compounds]. Prikl Biokhim Mikrobiol 2011; 47:386-396. [PMID: 21950111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Inhibition efficiency (antioxidant activity) of 26 oxygen-containing aromatic compounds was studied in methemalbumin-H202-o-phenylenediamine (PDA) or tetramethylbenzidine (TMB) pseudoperoxidase system at 20 degrees C in buffered physiological solution (pH 7.4) containing 6% DM F and 0.25% DMSO. The inhibitor's efficiency was quantitatively characterized by the inhibition constants (Ki, microM) or the inhibition degree (%). Ki values varied in the range of4 to 500 microM and were influenced by a substrate, the structure of an inhibitor, hydroxyl groups, electron-donating substituents in aromatic ring, and steric hindrances. The type of inhibition at cooxidation of eight pairs was noncompetitive, and that of five pairs was mixed and determined by the substrate nature and the inhibitor structure. Lignin phenolic compounds ofguaiacyl and syringal series exhibited high antioxidant activity (Ki in the range of 10-300 microM), and their efficiency decreased in the following order: caffeic acid > synapaldehyde > syringic acid > coniferyl aldehyde > para-hydroxycou maric acid.
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Gapan’kova SN, Brinkevich SD, Edimecheva IP, Kurchenko VP, Shadyro OI. Interaction of hydroxyaryl aldehydes with α-hydroxyethyl radicals. High Energy Chem 2011. [DOI: 10.1134/s0018143911030040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Brinkevich SD, Shadyro OI. A radiation-chemical and quantum-chemical study of ascorbic acid interaction with α-hydroxyethyl radicals. High Energy Chem 2011. [DOI: 10.1134/s0018143911020044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shadyro OI, Sosnovskaya AA, Edimecheva IP, Ostrovskaya NI, Kazem KM. Effect of phenolic compounds and quinones on radiation-induced oxidation processes of hexane and ethanol. High Energy Chem 2011. [DOI: 10.1134/s0018143908020033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Sosnovskaya AA, Sladkova AA, Dobridenev IS, Shadyro OI. Radiation-induced transformations of threonine and its derivatives in aqueous solutions. High Energy Chem 2009. [DOI: 10.1134/s0018143909060022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Brinkevich SD, Shadyro OI. Effects of coenzyme Q0, ascorbic acid, and its glycoside on the radiation-induced dephosphorylation of organic phosphates in aqueous solutions. High Energy Chem 2009. [DOI: 10.1134/s0018143909060034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lisovskaya AG, Sosnovskaya AA, Shadyro OI, Kisel’ MA, Nikolaevich VA. γ- and UV-radiation-induced degradation of sphingomyelin, lysosphingomyelin, and related compounds. High Energy Chem 2009. [DOI: 10.1134/s0018143909060046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
Based on product yield data on radiolysis of hexane, ethanol and 3 M aqueous ethylene glycol solutions, the ability of a number of arylamine, aminophenol and quinonimine derivatives to affect processes involving peroxyl, alkyl or alpha-hydroxyalkyl radicals was assessed. It has been shown that the introduction of a hydroxyl group into aromatic amine structure enhances its antioxidant performance and makes it significantly more reactive with respect to carbon-centered organic radicals. Replacement of the hydrogen atom of a hydroxyl group by a methyl group decreases the anti-radical activity of aminophenols drastically. Compounds containing (or capable of forming) a quinonimine moiety interact with alkyl or alpha-hydroxyalkyl radicals most effectively, suppressing recombination and fragmentation reactions of the latter. In the sequence: aromatic amines--aminophenols--quinonimines, a trend towards enhancement of the ability of the compounds studied to react with carbon-centered radicals was noted. Also, this study presents for the first time evidence of riboflavin reactivity with respect to organic radicals.
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Affiliation(s)
- G A Ksendzova
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya st.14, 220050 Minsk, Republic of Belarus
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Shadyro OI, Edimecheva IP, Glushonok GK, Ostrovskaya NI, Polozov GI, Murase H, Kagiya T. Effects of Phenolic Compounds on Reactions Involving Various Organic Radicals. Free Radic Res 2009; 37:1087-97. [PMID: 14703798 DOI: 10.1080/10715760310001600417] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Investigation of effects produced by 26 various phenol and diphenol derivatives, including industrial and natural antioxidants (ionol, bis-phenol 2246, alpha-tocopherol), on final product yields of radiation-induced free-radical processes involving peroxyl, alkyl, alpha-hydroxyalkyl and alpha,beta-dihydroxyalkyl radicals has been performed. Ionol and bis-phenol 2246 have been shown to be more effective than alpha-tocopherol or diphenol derivatives in suppressing hydrocarbon oxidation processes. At the same time, alpha-tocopherol and its water-soluble analogues, as well as diphenol-based substances, are more effective than phenol derivatives in regulating various homolytic processes involving carbon-centered radicals. This fact can be accounted for by taking into consideration the contribution to formation of the final product set and the respective yields made by semiquinone radicals and compounds with quinoid structure arising in the course of homolytic transformations in systems containing diphenol derivatives.
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Affiliation(s)
- O I Shadyro
- Research Institute for Physical Chemical Problems of the Belarusian State University, Leningradskaya St., 14, 220050 Minsk, Republic of Belarus.
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Grigorenko IA, Metelitsa DI, Piven' NV, Lukhverchik LN, Shadyro OI. [Highly effective test-system for determination of the total antioxidant activity of human blood serum]. Biomed Khim 2009; 55:350-360. [PMID: 19663008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A highly effective test-system for quantitative characterization of the total antioxidant activity (TAA) of human blood serum (HBS), including methemalbumin (MetHa) as biocatalyst, H2O2 as the oxidant, o-phenylenediamine (PDA) as the acceptor of radicals and 2,2,5,7,8-pentamethylchroman-6-ol (PMC) as the inhibitor-calibrator, has been developed and proved under the laboratory environments. The test-system has been optimized for the concentrations of all the components, the reaction conditions and the PDA consumption monitoring at 37 degrees C in the medium of buffered physiological solution, pH 7.4 containing 5% DMFA and 0.5% DMSO. Under strongly standardized conditions by a comparison of the inhibiting action of the HBS and the calibrator PMC at 37 degrees C, the quantitative parameters of the HBS TAA were determined in microg of PMC, equivalent to 1 mg of HBS, or as a reverse value in mg of HBS, equivalent to the action of 1 microg of PMC. The values of the HBS TAA significantly varied for the group of healthy individuals and essentially decreased for the group of patients with thyroid gland pathologies. This underlies necessity of antioxidant therapy in these patients.
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Brinkevich SD, Shadyro OI. Effect of ascorbic acid and its derivatives on the radiation-chemical transformations of hydroxyl-containing organic compounds. High Energy Chem 2008. [DOI: 10.1134/s0018143908040024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shadyro OI, Sosnovskaya AA, Edimecheva IP, Ostrovskaya NI, Kazem KM, Hryntsevich IB, Alekseev AV. Effects of quinones on free-radical processes of oxidation and fragmentation of hydroxyl-containing organic compounds. Bioorg Med Chem Lett 2007; 17:6383-6. [PMID: 17897823 DOI: 10.1016/j.bmcl.2007.08.076] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Accepted: 08/22/2007] [Indexed: 10/22/2022]
Abstract
The coenzymes Q and Vitamin K(3), as well as their synthetic analogues, have been found to inhibit free-radical processes of fragmentation of hydroxyl-containing organic compounds and oxidation of the latter by molecular oxygen. It has been established that the observed effects are due to the ability of quinones to oxidize the alpha-hydroxyl-containing carbon-centered radicals formed from the starting compounds.
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Affiliation(s)
- O I Shadyro
- Department of Chemistry of the Belarusian State University, Nezavisimosty av. 4, Minsk, Belarus.
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Grigorenko IA, Karaseva EI, Metelitsa DI, Sorokin VL, Ksendzova GA, Shadyro OI. [Substituted aminophenols and flavonoids as potential components for test-systems of total antioxidant activity]. Biomed Khim 2007; 53:566-576. [PMID: 18078071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A comparative kinetic study of ortho-phenylenediamine (PDA) oxidation in the "pseudoperoxidase" system Methemalbumin-H2O2 in the presence of 2-amino-4-tret-butylphenol (ATBP), 2-amino-4,6-di-tret-butylphenol (ADTBP) and its four N-acyl derivates, as well as flavonoids (quercetin, morin, silibin, hesperidin and naringin) has been carried out under standart conditions at 20 degrees C in phosphate buffered saline, pH 7.4, containing 5.25% ethanol and DMFA. ATBP, ADTBP and two its N-acyl-derivatives as well as all five flavonoids inhibited with different efficiency the PDA oxidation characterized in terms of the inhibition constants, K(i), M, or the percent of inhibition degree at the maximal taking concentrations of these inhibitors. Most effective antioxidants were quercetin (K(i) = 7.7x10(-5) M) and ATBP (K(i) = 1.26x10(-4) M). Using these characteristics and other necessary criteria, the pairs PDA-quercetin and PDA-ATBP were proposed for a practical application in the test-systems for total antioxidant activity of biological objects.
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Shadyro OI, Kisel’ RM. Glycoside bond cleavage in the radiolysis of aqueous solutions of methylglycosides and disaccharides. High Energy Chem 2007. [DOI: 10.1134/s0018143907050037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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42
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Yurkova IL, Kisel MA, Arnhold J, Shadyro OI. Effect of structure of polar head of phospholipids on their fragmentation during γ-irradiation of model membranes. High Energy Chem 2006. [DOI: 10.1134/s0018143906050031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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43
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Povalishev VN, Polozov GI, Shadyro OI. Effect of α-tocopherol and its sulfur-containing analogs on radiation-induced chemical transformations of hexane and ethanol. High Energy Chem 2006. [DOI: 10.1134/s0018143906050043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Shadyro OI, Kisel RM, Vysotskii VV, Edimecheva IP. Effects of vitamins, coenzymes and amino acids on reactions of homolytic cleavage of the O-glycoside bond in carbohydrates. Bioorg Med Chem Lett 2006; 16:4763-6. [PMID: 16844374 DOI: 10.1016/j.bmcl.2006.06.089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2006] [Revised: 06/23/2006] [Accepted: 06/29/2006] [Indexed: 01/22/2023]
Abstract
It has been established that vitamins B1, K3 and C, coenzyme Q0 and amino acids cysteine and histidine effectively inhibit reactions of homolytic cleavage of the O-glycoside bond, which are responsible for the destruction of di- and polysaccharides on gamma-irradiation or the action of other reactive radical initiators. This effect was shown to originate from either oxidation or reduction of the radicals of carbohydrates undergoing destruction.
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Affiliation(s)
- O I Shadyro
- Department of Chemistry of the Belarussian State University, Nezavisimosti Av., 4, 220050 Minsk, Belarus.
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45
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Chernyavskaya AA, Loginova NV, Polozov GI, Shadyro OI, Sheryakov AA, Bondarenko EV. Synthesis and antimicrobial activity of silver(I) and copper(II) complexes with 2-(4,6-di-tert-butyl-2,3-dihydroxyphenylsulfanyl) acetic acid. Pharm Chem J 2006. [DOI: 10.1007/s11094-006-0141-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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46
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Povalishev VN, Polozov GI, Shadyro OI. Effects of alpha-tocopherol and related compounds on reactions involving various organic radicals. Bioorg Med Chem Lett 2005; 16:1236-9. [PMID: 16343902 DOI: 10.1016/j.bmcl.2005.11.078] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2005] [Accepted: 11/21/2005] [Indexed: 11/30/2022]
Abstract
Effects of alpha-tocopherol, PMC, and a number of the respective sulfur-containing analogues on reactions involving various organic radicals were studied. The test compounds were found to interact with alkyl radicals more effectively than with peroxyl radicals. The presence of a sulfur atom in structures of the respective analogues did not produce significant effects on reactivity. Derivatives of 5-hydroxy-1,3-benzoxathiol-2-one and 6-hydroxy-1,4-benzoxathiin-2(3H)-one displayed a high reactivity toward alpha-hydroxyalkyl radicals.
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Affiliation(s)
- V N Povalishev
- Department of Chemistry, Belarussian State University, Nezavisimosti av., 4, 220050 Minsk, Republic of Belarus
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47
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Hryntsevich IB, Shadyro OI. Reactions of α-hydroxyethyl radicals with flavonoids of various structures. Bioorg Med Chem Lett 2005; 15:4252-5. [PMID: 16098743 DOI: 10.1016/j.bmcl.2005.06.065] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2004] [Revised: 06/23/2005] [Accepted: 06/23/2005] [Indexed: 11/17/2022]
Abstract
It has been found that flavonoids (FL) are able to reduce, add or oxidize alpha-hydroxyethyl radicals (HER). The probability of these processes to occur depends on the structure of the FL under study. Namely, to cause reduction of HER, the presence of hydroxyl groups is necessary, and to effect oxidation or addition of HER, the presence of a carbonyl group at C4 and a C2-C3 double bond in the C ring is required.
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Affiliation(s)
- I B Hryntsevich
- Department of Chemistry of the Belarussian State University, Skaryna av., 4, 220050 Minsk, Republic of Belarus
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48
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Naumchik IV, Karasyova EI, Metelitza DI, Edimecheva IP, Sorokin VL, Shadyro OI. Inhibition of peroxidase-catalyzed oxidation of 3,3 ,5,5 -tetramethylbenzidine by aminophenols. Biochemistry (Mosc) 2005; 70:322-9. [PMID: 15823087 DOI: 10.1007/s10541-005-0118-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Peroxidase-catalyzed oxidation of 3,3 ,5,5 -tetramethylbenzidine (TMB) was inhibited by o-aminophenol (AP), 2-amino-4-tert-butylphenol (ATBP), 2-amino-4,6-di-tert-butylphenol (ADTBP), and 4-tert-butylpyrocatechol (TBP). Inhibitors were characterized by inhibition constant K(i) and stoichiometric coefficient f, the number of radicals terminated by one inhibitor molecule. The most efficient inhibitor is ADTBP characterized by K(i) = 36 microM in 0.015 M phosphate citrate buffer, pH 6.0, at 20 degrees C. According to their antiradical efficiency, the studied inhibitors can be arranged as follows: ADTBP > ATBP > AP > TBP. The role of the NH(2) group in the inhibitory capacity of aminophenols is discussed. Using gas-liquid chromatography, kinetics of consumption of the initial components and accumulation of the reaction products on peroxidase-catalyzed oxidation of the TMB-TBP pair was studied; the data clarify the stages of a complex process of co-oxidation of amines and phenols.
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Affiliation(s)
- I V Naumchik
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, ul. Akademika Kuprevicha 5/2, Minsk 220141, Belarus
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49
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Lagutin PY, Shadyro OI. Effects of B group vitamins on reactions of various α-hydroxyl-containing organic radicals. Bioorg Med Chem Lett 2005; 15:3797-800. [PMID: 15993058 DOI: 10.1016/j.bmcl.2005.05.083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2005] [Revised: 05/11/2005] [Accepted: 05/11/2005] [Indexed: 11/17/2022]
Abstract
Effects of vitamins B1, B2, B6, and pyridoxal phosphate (PPh) on final product formation in radiolysis of aqueous solutions of ethanol, ethylene glycol, alpha-methylglycoside, and maltose were studied. It has been found that vitamin B2 and PPh effectively oxidize R*CHOH species, while suppressing their recombination and fragmentation reactions, thereby increasing the yields of the respective oxidation products. Vitamins B1 and B2 are capable of reducing alcohol radicals to the respective initial molecules, decreasing the yields of the radical transformation products.
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Affiliation(s)
- P Yu Lagutin
- Department of Chemistry of the Belarussian State University, Skaryna av., 4, 220050 Minsk, Republic of Belarus
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Edimecheva IP, Ostrovskaya NI, Polozov GI, Shadyro OI. Reaction of Sterically Congested Phenols and Quinones with Organic Radicals. RUSS J GEN CHEM+ 2005. [DOI: 10.1007/s11176-005-0278-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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