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Belaya NI, Belyi AV, Shcherbakov IN, Budnikova EA. Two-Variable Predictive Model of the Antiradical Activity of Hydroxybenzoic Acids in Media with Physiological pH. KINETICS AND CATALYSIS 2022. [DOI: 10.1134/s002315842106001x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kovacikova L, Prnova MS, Majekova M, Bohac A, Karasu C, Stefek M. Development of Novel Indole-Based Bifunctional Aldose Reductase Inhibitors/Antioxidants as Promising Drugs for the Treatment of Diabetic Complications. Molecules 2021; 26:molecules26102867. [PMID: 34066081 PMCID: PMC8151378 DOI: 10.3390/molecules26102867] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/29/2021] [Accepted: 05/04/2021] [Indexed: 01/16/2023] Open
Abstract
Aldose reductase (AR, ALR2), the first enzyme of the polyol pathway, is implicated in the pathophysiology of diabetic complications. Aldose reductase inhibitors (ARIs) thus present a promising therapeutic approach to treat a wide array of diabetic complications. Moreover, a therapeutic potential of ARIs in the treatment of chronic inflammation-related pathologies and several genetic metabolic disorders has been recently indicated. Substituted indoles are an interesting group of compounds with a plethora of biological activities. This article reviews a series of indole-based bifunctional aldose reductase inhibitors/antioxidants (ARIs/AOs) developed during recent years. Experimental results obtained in in vitro, ex vivo, and in vivo models of diabetic complications are presented. Structure–activity relationships with respect to carboxymethyl pharmacophore regioisomerization and core scaffold modification are discussed along with the criteria of ‘drug-likeness”. Novel promising structures of putative multifunctional ARIs/AOs are designed.
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Affiliation(s)
- Lucia Kovacikova
- Institute of Experimental Pharmacology and Toxicology, CEM SAS, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia; (L.K.); (M.S.P.); (M.M.)
| | - Marta Soltesova Prnova
- Institute of Experimental Pharmacology and Toxicology, CEM SAS, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia; (L.K.); (M.S.P.); (M.M.)
| | - Magdalena Majekova
- Institute of Experimental Pharmacology and Toxicology, CEM SAS, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia; (L.K.); (M.S.P.); (M.M.)
| | - Andrej Bohac
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovakia;
- Biomagi, Inc., Mamateyova 26, 851 04 Bratislava, Slovakia
| | - Cimen Karasu
- Cellular Stress Response and Signal Transduction Research Laboratory, Department of Medical Pharmacology, Faculty of Medicine, Gazi University, Beşevler, 06500 Ankara, Turkey;
| | - Milan Stefek
- Institute of Experimental Pharmacology and Toxicology, CEM SAS, Dúbravská Cesta 9, 841 04 Bratislava, Slovakia; (L.K.); (M.S.P.); (M.M.)
- Correspondence:
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López-Alarcón C, Fuentes-Lemus E, Figueroa JD, Dorta E, Schöneich C, Davies MJ. Azocompounds as generators of defined radical species: Contributions and challenges for free radical research. Free Radic Biol Med 2020; 160:78-91. [PMID: 32771519 DOI: 10.1016/j.freeradbiomed.2020.06.021] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 06/05/2020] [Indexed: 02/08/2023]
Abstract
Peroxyl radicals participate in multiple processes involved in critical changes to cells, tissues, pharmacueticals and foods. Some of these reactions explain their association with degenerative pathologies, including cardiovascular and neurological diseases, as well as cancer development. Azocompounds, and particularly AAPH (2,2'-Azobis(2-methylpropionamidine) dihydrochloride), a cationic water-soluble derivative, have been employed extensively as sources of model peroxyl radicals. A considerable number of studies have reported mechanistic data on the oxidation of biologically-relevant targets, the scavenging activity of foods and natural products, and the reactions with, and responses of, cultured cells. However, despite the (supposed) experimental simplicity of using azocompounds, the chemistry of peroxyl radical production and subsequent reactions is complicated, and not always considered in sufficient depth when analyzing experimental data. The present work discusses the chemical aspects of azocompounds as generators of peroxyl (and other) radicals, together with their contribution to our understanding of biochemistry, pharmaceutical and food chemistry research. The evidence supporting a role for the formation of alkoxyl (RO•) and other radicals during thermal and photochemical decomposition of azocompounds is assessed, together with the potential influence of such species on the reactions under study.
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Affiliation(s)
- Camilo López-Alarcón
- Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile.
| | - Eduardo Fuentes-Lemus
- Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Juan David Figueroa
- Departamento de Química Física, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Eva Dorta
- Departamento de Producción Vegetal en Zonas Tropicales y Subtropicales, Instituto Canario de Investigaciones Agrarias, Tenerife, Spain
| | - Christian Schöneich
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS, 66047, USA
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark
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Belaya NI, Belyi AV, Shcherbakov IN. Predictive Model of the Relationship of the Antiradical Activity and the Ionization Potential of Molecules and Ions of Flavonoids. KINETICS AND CATALYSIS 2020. [DOI: 10.1134/s0023158420030040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Antosik A, Czubak K, Cichon N, Nowak P, Zbikowska H. Vitamin E Analogue Protects Red Blood Cells against Storage-Induced Oxidative Damage. Transfus Med Hemother 2018; 45:347-354. [PMID: 30498413 DOI: 10.1159/000486605] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 01/03/2018] [Indexed: 01/20/2023] Open
Abstract
Background To investigate i) the effects of Trolox® or mannitol, which represent two different classes of antioxidants, on oxidative changes generated in manually isolated red blood cells (RBCs) from citrate-phosphate-dextrose (CPD) preserved whole blood, followed by up to 20 days refrigerated storage, and ii) whether Trolox supplemented to the blood bank-manufactured saline-adenine-glucose-mannitol (SAGM) preserved RBC units would offer better storage conditions compared with SAGM alone. Methods The percentage of hemolysis and extracellular activity of lactate dehydrogenase (LDH) was measured to assess RBC membrane integrity. Lipid peroxidation, reduced glutathione (GSH) levels and total antioxidant capacity (TAC) were quantified by thiobarbituric acid-reactive substances (TBARS), Ellman's reagent and 2, 2'-azinobis-(3-ethylbenzothiazoline-6-sulfonate) (ABTS.+) based assay, respectively. Results Trolox was little more effective than mannitol in protecting against progressive RBC hemolysis. Trolox (0.125-3.125 mmol/l) inhibited storage-induced leakage of LDH, lipid peroxidation, and to a lesser extent GSH depletion. Mannitol at these concentrations neither inhibited TBARS formation nor prevented GSH depletion. RBC units stored in SAGM-Trolox had significantly lower hemolysis, LDH leakage, and lipid peroxidation level compared to RBCs stored in SAGM. Conclusion There is evidence of the beneficial effects of supplementing RBC-additive solutions with membrane-interacting antioxidants such as vitamin E analogues.
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Affiliation(s)
- Adam Antosik
- Department of General Biochemistry, University of Lodz, Lodz, Poland
| | - Kamila Czubak
- Department of General Biochemistry, University of Lodz, Lodz, Poland
| | - Natalia Cichon
- Department of General Biochemistry, University of Lodz, Lodz, Poland
| | - Pawel Nowak
- Department of General Biochemistry, University of Lodz, Lodz, Poland
| | - Halina Zbikowska
- Department of General Biochemistry, University of Lodz, Lodz, Poland
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Pirillo J, Mazzone G, Russo N. Theoretical Insights into the Switching Off/On of 1 O 2 Photosensitization in Chemicontrolled Photodynamic Therapy. Chemistry 2018; 24:3512-3519. [PMID: 29314348 DOI: 10.1002/chem.201704768] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Indexed: 01/17/2023]
Abstract
Density Functional Theory and time-dependent (TD) DFT calculations were carried out for recently reported 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based photosensitizers (PSs) that could be activated by reactive oxygen species (ROS) to generate 1 O2 specifically in target tissues. To assess the applicability of the compounds as activatable PSs (a-PSs) in photodynamic therapy, absorption wavelengths; singlet-triplet energy gaps; and spin-orbit matrix elements for the radiationless transition, Sn →Tm , were investigated. A TD-DFT qualitative analysis indicated that only a Br-substituted BODIPY derivative with the chromanol ring of α-tocopherol linked by methylene functioned as an a-PS. The chromanol ring promotes photoinduced electron transfer to the BODIPY unit that reduces the probability of intersystem crossing and triplet-state population, and can turn off 1 O2 photosensitization. Therefore, 1 O2 photosensitization can be switched on only in target cells in which the chromanol ring is oxidized by ROS. The oxidation reaction pathways of the most promising derivative, by either 1 O2 or cumyloxyl radical as typical ROS, have been examined to reveal that oxidation by the cumyloxyl radical is more effective than that by 1 O2 .
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Affiliation(s)
- Jenny Pirillo
- Institute of Transformative Bio-Molecules, Nagoya University, Chikusa-ku, 464-8602, Nagoya, Japan
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, 87036, Arcavacata di Rende, Italy
| | - Nino Russo
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, 87036, Arcavacata di Rende, Italy
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Asikin Y, Takahashi M, Mizu M, Takara K, Oku H, Wada K. DNA damage protection against free radicals of two antioxidant neolignan glucosides from sugarcane molasses. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:1209-1215. [PMID: 25865605 DOI: 10.1002/jsfa.7208] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 02/02/2015] [Accepted: 04/03/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Sugarcane molasses is a potential by-product of the sugarcane manufacturing industry that is rich in antioxidant materials. The present study aimed to obtain antioxidative compounds from sugarcane molasses and to evaluate their ability to protect DNA from oxidative damage. RESULTS Two neolignan glucosides were isolated from sugarcane molasses using bioassay and UV spectra monitoring-guided fractionation. The compounds were elucidated as (7R,8S)-dehydrodiconiferyl alcohol-4-O-β-d-glucoside (1) and (7S,8R)-simulanol-9'-O-β-d-glucoside (2). Neolignan glucoside 2 protected against DNA damage caused by free radicals more effectively than did neolignan glucoside 1 (13.62 and 9.08 µmol L(-1) for peroxyl and hydroxyl radicals, respectively, compared to 48.07 and 14.42 µmol L(-1) ). Additionally, neolignan glucoside 2 exhibited superior DNA protection against free radicals compared with various known antioxidative compounds, including p-coumaric acid, ferulic acid, vanillic acid and epigallocatechin gallate. CONCLUSION The isolated neolignan glucosides from sugarcane molasses are able to protect DNA from oxidative damage caused by free radicals. This is the first identification of these two compounds in sugarcane molasses. The sugarcane molasses can therefore be used as potential nutraceutical preventative agents, and the findings may foster the utilization of this by-product as a bioresource-based product. © 2015 Society of Chemical Industry.
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Affiliation(s)
- Yonathan Asikin
- Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Okinawa, 903-0213, Japan
| | - Makoto Takahashi
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, 903-0213, Japan
| | - Masami Mizu
- Product Development Division, Mitsui Sugar Co. Ltd, Tokyo, 103-8423, Japan
| | - Kensaku Takara
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, 903-0213, Japan
| | - Hirosuke Oku
- Tropical Biosphere Research Center, University of the Ryukyus, Nishihara, Okinawa, 903-0213, Japan
| | - Koji Wada
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Nishihara, Okinawa, 903-0213, Japan
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Kovacikova L, Majekova M, Stefek M. Substituted pyridoindoles as biological antioxidants: drug design, chemical synthesis, and biological activity. Methods Mol Biol 2015; 1208:313-27. [PMID: 25323517 DOI: 10.1007/978-1-4939-1441-8_23] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Great effort has been devoted to design and synthesize biologically active and pharmacologically acceptable antioxidants. Although a number of efficient antioxidant compounds have been designed, synthesized, and tested in animals, none of them have demonstrated sufficient efficacy in human clinical trials without undesirable side effects. Thus new pharmacologically applicable antioxidants have been sought for. Substituted pyridoindoles represent a broad spectrum of pharmacologically active substances including highly effective scavengers of reactive oxygen species. The hexahydropyridoindole scaffold represents a valuable lead with a great deal of knowledge on molecular mechanisms of free radical scavenging, on bioavailability and toxicity. Its modification may yield congeners tailored according to specific requirements for antiradical efficacy, lipophilicity, and basicity, meeting the aim of providing a pharmacologically practicable antioxidant drug as exemplified by the novel derivative SMe1EC2.
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Affiliation(s)
- Lucia Kovacikova
- Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, Dubravska cesta 9, 841 04, Bratislava, Slovakia
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Manasa K, Vani R. In Vitro Susceptibility of Wistar Rat Platelets to Hydrogen Peroxide and AAPH-Induced Oxidative Stress. Indian J Hematol Blood Transfus 2015; 31:90-7. [PMID: 25548452 PMCID: PMC4275511 DOI: 10.1007/s12288-014-0386-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 04/01/2014] [Indexed: 11/24/2022] Open
Abstract
Hydroxyl and peroxyl radicals are biologically active species because of their likelihood to damage cellular constituents. An in vitro study on Wistar rats was conducted to investigate the influence of hydrogen peroxide (H2O2) and 2,2'-azobis(2-amidinopropane) dihydrochloride (AAPH) on platelets and compare the vulnerability of platelets to oxidative stress (OS) induced by these two free radical initiators. Isolated platelets were divided into controls (without free radical initiators; n = 5) and experimentals (with free radical initiators; n = 5). Different concentrations (0.5, 1.0 and 2.0) of free radical initiators H2O2 and AAPH were used to treat the platelets and incubated for 5, 15 and 30 min. Biomarkers such as platelet aggregation, superoxide generation, lipid peroxidation (thiobarbituric acid reactive substances, conjugate dienes), protein oxidation (protein carbonyls, sulfhydryls) and antioxidant enzymes were assessed. In H2O2 and AAPH treated platelets, though OS was observed at concentrations of 0.5 and 1.0 mM, platelets could tolerate the oxidative insult. Treatment of platelets with 2.0 mM H2O2 demonstrated the onset of irreversible changes in platelets as observed in the results of increased superoxide generation and lipid peroxidation products. In 2.0 mM AAPH platelets, the oxidative damage was evident as indicated through increased aggregation, superoxide generation and conjugate dienes and lower protein sulfhydryls. Platelets were more susceptible to AAPH than H2O2, as AAPH acted on both lipids and proteins whereas H2O2 acted only on lipids. This study gives insight on platelet survival under different OS situations.
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Affiliation(s)
- K. Manasa
- Department of Biotechnology, Center for Post Graduate Studies, Jain University, #18/3, 9th Main, 3rd Block, Jayanagar, Bangalore, 560011 India
| | - R. Vani
- Department of Biotechnology, Center for Post Graduate Studies, Jain University, #18/3, 9th Main, 3rd Block, Jayanagar, Bangalore, 560011 India
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Li X, Chen D, Wang G, Lu Y. Probing the interaction of human serum albumin with DPPH in the absence and presence of the eight antioxidants. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:1144-1152. [PMID: 25305605 DOI: 10.1016/j.saa.2014.08.140] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 06/22/2014] [Accepted: 08/31/2014] [Indexed: 06/04/2023]
Abstract
Albumin represents a very abundant and important circulating antioxidant in plasma. DPPH radical is also called 2,2-diphenyl-1-picrylhydrazyl. It has been widely used for measuring the efficiency of antioxidants. In this paper, the ability of human serum albumin (HSA) to scavenge DPPH radical was investigated using UV-vis absorption spectra. The interaction between HSA and DPPH was investigated in the absence and presence of eight popular antioxidants using fluorescence spectroscopy. These results indicate the antioxidant activity of HSA against DPPH radical is similar to glutathione and the value of IC50 is 5.200×10(-5) mol L(-1). In addition, the fluorescence experiments indicate the quenching mechanism of HSA, by DPPH, is a static process. The quenching process of DPPH with HSA is easily affected by the eight antioxidants, however, they cannot change the quenching mechanism of DPPH with HSA. The binding of DPPH to HSA primarily takes place in subdomain IIA and exists two classes of binding sites with two different interaction behaviors. The decreased binding constants and the number of binding sites of DPPH with HSA by the introduction of the eight antioxidants may result from the competition of the eight antioxidants and DPPH binding to HSA. The binding of DPPH to HSA may induce the micro-environment of the lone Trp-214 from polar to slightly nonpolar.
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Affiliation(s)
- Xiangrong Li
- Department of Chemistry, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Dejun Chen
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Gongke Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Yan Lu
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China.
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López-Alarcón C, Arenas A, Lissi E, Silva E. The role of protein-derived free radicals as intermediaries of oxidative processes. Biomol Concepts 2014; 5:119-30. [DOI: 10.1515/bmc-2014-0004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 03/11/2014] [Indexed: 02/05/2023] Open
Abstract
AbstractThe fact that proteins are the main target of reactive species formed in the cells and extracellular fluids has led to the realization of a great deal of research devoted to revealing the molecular and biological consequences associated with the presence of intermediary protein radicals. This review article describes and comments upon the main chemical pathways involving primary proteic radicals.
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Affiliation(s)
- Camilo López-Alarcón
- 1Departamento de Farmacia, Facultad de Química, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Santiago 7820436, Chile
| | | | - Eduardo Lissi
- 3Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Eduardo Silva
- 2Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Chile
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Sakul A, Cumaoğlu A, Aydin E, Ari N, Dilsiz N, Karasu C. Age- and diabetes-induced regulation of oxidative protein modification in rat brain and peripheral tissues: consequences of treatment with antioxidant pyridoindole. Exp Gerontol 2013; 48:476-84. [PMID: 23470276 DOI: 10.1016/j.exger.2013.02.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 02/25/2013] [Accepted: 02/26/2013] [Indexed: 01/12/2023]
Abstract
The increased glyco- and lipo-oxidation events are considered one of the major factors in the accumulation of non-functional damaged proteins, and the antioxidants may inhibit extensive protein modification and nitrosylated protein levels, enhancing the oxidative damage at the cellular levels in aging and diabetes. Because of its central role in the pathogenesis of age-dependent and diabetes-mediated functional decline, we compared the levels of oxidatively modified protein markers, namely AGEs (Advanced Glycation End-protein adducts), 4-HNE (4-hydroxy-nonenal-histidine) and 3-NT (3-nitrotyrosine), in different tissues of young and old rats. Separately, these three oxidative stress parameters were explored in old rats subjected to experimentally induced diabetes and following a long-term treatment with a novel synthetic pyridoindole antioxidant derived from stobadine-SMe1EC2 (2-ethoxycarbonyl-8-methoxy-2,3,4,4a,5,9b-hexahydro-1H-pyrido[4,3-b]indolinium dichloride). Diabetes induced by streptozotocin injection in rats aged 13-15 months, and SMe1EC2 treatment was applied during 4months to aged diabetic rats. AGEs and 4-HNE levels were significantly elevated in brain, ventricle and kidney, but not in lens and liver of aged rats when compared with young rats. Diabetes propagated ageing-induced increase in AGEs and 4-HNE in brain, ventricle and kidney, and raised significantly lens and liver AGEs and 4-HNE levels in aged rats. In aged diabetic rats, SMe1EC2 protected only the kidney against increase in AGEs, and inhibited significantly 4-HNE levels in brain, kidney, liver and lens that were observed more pronounced in lens. 3-NT was significantly increased in brain of aged rats and in kidney, lens and ventricle of aged diabetic rats, while SMe1EC2 has no protective effect on 3-NT increase. Results demonstrate that (1) the responsiveness of different tissue proteins to glyco-lipo-oxidative and nitrosative stress in the course of normal aging was miscellaneous. (2) Diabetes is a major factor contributing to accelerated aging. (3) SMe1EC2 selectively inhibited the generation of oxidatively modified proteins, only in a limited number of tissues.
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Affiliation(s)
- Arzu Sakul
- Cellular Stress Response & Signal Transduction Research Laboratory, Department of Medical Pharmacology, Faculty of Medicine, Gazi University, Ankara, Turkey
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Dobrzyńska I, Szachowicz-Petelska B, Skrzydlewska E, Figaszewski Z. Effect of sweet grass (Hierochloe odorata) on the physico-chemical properties of liver cell membranes from rats intoxicated with ethanol. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2013; 35:247-253. [PMID: 23353548 DOI: 10.1016/j.etap.2012.12.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 12/12/2012] [Accepted: 12/26/2012] [Indexed: 06/01/2023]
Abstract
Changes in the composition and physicochemical properties of liver cell membranes due to ethanol intoxication are due mainly to reactive oxygen species (ROS). The destructive action of free radicals can be neutralized by administration of antioxidants. The purpose of this study was to investigate the efficacy of sweet grass on the physicochemical and biochemical properties of the rat liver membrane altered by chronic ethanol intoxication. Qualitative and quantitative composition of phospholipids and proteins in the membrane were determined by HPLC. Ethanol increased phospholipid levels and altered the level of integral proteins as determined by decreased phenylalanine, cysteine and lysine. Ethanol significantly enhanced changes in the surface charge density of the liver cell membranes as determined by electrophoresis. Administration of sweet grass to rats intoxicated with ethanol significantly protects lipids and proteins against oxidative modifications. Therefore, sweet grass protects against some of the deleterious membrane changes associated with ethanol exposure.
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Affiliation(s)
- Izabela Dobrzyńska
- Institute of Chemistry, University in Białystok, Al. Piłsudskiego 11/4, 15-443 Białystok, Poland
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Arenas A, López-Alarcón C, Kogan M, Lissi E, Davies MJ, Silva E. Chemical Modification of Lysozyme, Glucose 6-Phosphate Dehydrogenase, and Bovine Eye Lens Proteins Induced by Peroxyl Radicals: Role of Oxidizable Amino Acid Residues. Chem Res Toxicol 2013; 26:67-77. [DOI: 10.1021/tx300372t] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrea Arenas
- Departamento
de Química
Física, Facultad de Química, Pontificia Universidad Católica de Chile, Avda. Vicuña
Mackenna 4860, Santiago, Chile
| | - Camilo López-Alarcón
- Departamento de Farmacia, Facultad
de Química, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna 4860, Santiago,
Chile
| | - Marcelo Kogan
- Departamento de Química
Farmacológica y Toxicológica, Facultad de Ciencias Químicas
y Farmacéuticas, Universidad de Chile, Sergio Livingstone Pohlhammer 1007, Santiago, Chile
| | - Eduardo Lissi
- Facultad de Química y
Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O’Higgins 3363, Santiago, Chile
| | - Michael J. Davies
- The Heart Research Institute, Newtown, Sydney, NSW 2042, Australia
- Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
| | - Eduardo Silva
- Departamento
de Química
Física, Facultad de Química, Pontificia Universidad Católica de Chile, Avda. Vicuña
Mackenna 4860, Santiago, Chile
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Szachowicz-Petelska B, Skrzydlewska E, Figaszewski Z. Protective effect of black tea on integral membrane proteins in rat liver. ACTA ACUST UNITED AC 2013; 65:173-9. [DOI: 10.1016/j.etp.2011.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 06/14/2011] [Accepted: 08/18/2011] [Indexed: 01/14/2023]
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Alberto ME, Russo N, Grand A, Galano A. A physicochemical examination of the free radical scavenging activity of Trolox: mechanism, kinetics and influence of the environment. Phys Chem Chem Phys 2013; 15:4642-50. [DOI: 10.1039/c3cp43319f] [Citation(s) in RCA: 168] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Szachowicz-Petelska B, Dobrzyńska I, Skrzydlewska E, Figaszewski Z. Protective effect of blackcurrant on liver cell membrane of rats intoxicated with ethanol. J Membr Biol 2012; 245:191-200. [PMID: 22527605 PMCID: PMC3345183 DOI: 10.1007/s00232-012-9429-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 04/01/2012] [Indexed: 11/12/2022]
Abstract
Chronic ethanol intoxication oxidative stress participates in the development of many diseases. Nutrition and the interaction of food nutrients with ethanol metabolism may modulate alcohol toxicity. One such compound is blackcurrant, which also has antioxidant abilities. We investigated the effect of blackcurrant as an antioxidant on the composition and electrical charge of liver cell membranes in ethanol-intoxicated rats. Qualitative and quantitative phospholipid composition and the presence of integral membrane proteins were determined by high-performance liquid chromatography. Electrophoresis was used to determine the surface charge density of the rat liver cell membranes. Ethanol intoxication is characterized by changes in cell metabolism that alter the structure and function of cell membrane components. Ethanol increased phospholipid levels and altered the level of integral proteins as determined by decreased phenylalanine, cysteine, and lysine. Ethanol significantly enhanced changes in the surface charge density of the liver cell membranes. Administration of blackcurrant to rats intoxicated with ethanol significantly protected lipids and proteins against oxidative modifications. It is possible that the beneficial effect of blackcurrant is connected with its abilities to scavenge free radicals and to chelate metal ions.
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Affiliation(s)
| | - Izabela Dobrzyńska
- Institute of Chemistry, University in Białystok, Al. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Elżbieta Skrzydlewska
- Department of Analytical Chemistry, Medical University of Białystok, Mickiewicza 2, 15-230 Białystok, Poland
| | - Zbigniew Figaszewski
- Institute of Chemistry, University in Białystok, Al. Piłsudskiego 11/4, 15-443 Białystok, Poland
- Laboratory of Electrochemical Power Sources, Faculty of Chemistry, University of Warsaw, Pasteur St. 1, 02-093 Warsaw, Poland
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Oxidative/nitrosative stress and protein damages in aqueous humor of hyperglycemic rabbits: effects of two oral antidiabetics, pioglitazone and repaglinide. EXPERIMENTAL DIABETES RESEARCH 2012; 2012:653678. [PMID: 22474428 PMCID: PMC3303562 DOI: 10.1155/2012/653678] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Revised: 12/28/2011] [Accepted: 12/29/2011] [Indexed: 12/13/2022]
Abstract
The present study was undertaken to determine oxidative/nitrosative stress in aqueous humor of alloxan-induced hyperglycemic rabbits and to investigate the effects of two oral antidiabetic drugs, pioglitazone from peroxisome proliferator-activated receptor gamma (PPARγ) agonists and repaglinide from nonsulfonylurea KATP channel blockers. Ascorbic acid (AA), glutathione (GSH), total antioxidant status (TAS), lipid peroxidation products (LPO), total nitrites (NO2), advanced oxidized protein products (AOPP), and protein carbonyl groups (PCG) were determined using respective colorimetric and ELISA methods.
In our hyperglycemic animals, AA decreased by 77%, GSH by 45%, and TAS by 66% as compared to control animals. Simultaneously, LPO increased by 78%, PCG by 60%, AOPP by 84%, and NO2 by 70%. In pioglitazone-treated animals, AA and TAS increased above control values while GSH and PCG were normalized. In turn, LPO was reduced by 54%, AOPP by 84%, and NO2 by 24%, in relation to hyperglycemic rabbits. With repaglinide, AA and TAS were normalized, GSH increased by 20%, while LPO decreased by 45%.
Our results show that pioglitazone and repaglinide differ significantly in their ability to ameliorate the parameters like NO2, PCG, and AOPP. In this area, the multimodal action of pioglitazone as PPARγ agonist is probably essential.
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Augustyniak A, Bartosz G, Čipak A, Duburs G, Horáková L, Łuczaj W, Majekova M, Odysseos AD, Rackova L, Skrzydlewska E, Stefek M, Štrosová M, Tirzitis G, Venskutonis PR, Viskupicova J, Vraka PS, Žarković N. Natural and synthetic antioxidants: An updated overview. Free Radic Res 2010; 44:1216-62. [DOI: 10.3109/10715762.2010.508495] [Citation(s) in RCA: 177] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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20
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Dobrzyńska I, Szachowicz-Petelska B, Skrzydlewska E, Figaszewski Z. Effect of L-carnitine on liver cell membranes in ethanol-intoxicated rats. Chem Biol Interact 2010; 188:44-51. [PMID: 20637186 DOI: 10.1016/j.cbi.2010.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 06/25/2010] [Accepted: 07/03/2010] [Indexed: 11/24/2022]
Abstract
Ethanol intoxication is characterized by changes in cell metabolism which alter the structure and function of cell membrane components, including phospholipids and integral membrane proteins. The interaction of food nutrients with ethanol may modulate alcohol toxicity. One such compound is l-carnitine (l-3-hydroxy-4-N,N,N-trimethylaminobutyrate), which is also an antioxidant. Here we investigate l-carnitine as an antioxidant and assess its effect on the composition and electrical charge of liver cell membranes in ethanol-intoxicated rats. Qualitative and quantitative phospholipid composition and the presence of integral membrane proteins were determined by high performance liquid chromatography (HPLC). Electrophoresis was used to determine the surface charge density of the rat liver cell membranes. Ethanol increased phospholipid levels and altered the level of integral proteins as determined by decreased phenylalanine (Phe), cysteine (Cys) and lysine (Lys). Ethanol significantly enhanced changes in the surface charge density of the liver cell membranes. l-Carnitine administration to ethanol-intoxicated rats significantly protects phospholipids and proteins against oxidative modifications. Therefore, the beneficial effect of l-carnitine may be connected to its ability to scavenge free radicals.
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Affiliation(s)
- Izabela Dobrzyńska
- Institute of Chemistry, University in Białystok, Al. Piłsudskiego 11/4, 15-443 Białystok, Poland
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21
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Siflinger-Birnboim A, Levin RM, Hass MA. Partial outlet obstruction of the rabbit urinary bladder induces selective protein oxidation. Neurourol Urodyn 2008; 27:532-9. [DOI: 10.1002/nau.20557] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Voss P, Engels M, Strosova M, Grune T, Horakova L. Protective effect of antioxidants against sarcoplasmic reticulum (SR) oxidation by Fenton reaction, however without prevention of Ca-pump activity. Toxicol In Vitro 2008; 22:1726-33. [PMID: 18692562 DOI: 10.1016/j.tiv.2008.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2008] [Revised: 04/18/2008] [Accepted: 07/16/2008] [Indexed: 01/09/2023]
Abstract
The Ca(2+)-ATPase of the sarcoplasmic reticulum (SERCA) of rabbit skeletal muscle was oxidized by Fe2+/H2O2/ascorbic acid (AA), a system which generates HO(.) radicals according to the Fenton reaction: (Fe2(+)+H2O2-->HO(.)+OH(-)+Fe(3+)) under conditions similar to the pathological state of inflammation. Under these conditions, when hydroxyl-radicals and/or ferryl-radicals are generated, a 50% decrease of the SERCA activity was observed, a significant decrease of SH groups and an increase of protein carbonyl groups and lipid peroxidation were identified. Two new bands, time dependent in density, appeared in the SERCA protein electrophoresis after incubation with the Fenton system (at approximately 50 and 75kDa), probably due to structural changes as supported also by trypsin digestion. Immunoblotting of DNPH derivatized protein bound carbonyls detected a time dependent increase after incubation of SERCA with the Fenton system. Trolox and the pyridoindole stobadine (50microM) protected SR against oxidation induced via the Fenton system by preventing SH group oxidation and lipid peroxidation. Pycnogenol((R)) and EGb761 (40microg/ml) protected SERCA in addition against protein bound carbonyl formation. In spite of the antioxidant effects, trolox and stobadine were not able to prevent a decrease in the SERCA Ca(2+)-ATPase activity. Pycnogenol and EGb761 even enhanced the decrease of the Ca(2+)-ATPase activity induced by the Fenton system, probably by secondary oxidative reactions.
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Affiliation(s)
- Peter Voss
- Research Institute for Environmental Medicine gGmbH at the Heinrich-Heine-University, Duesseldorf, Germany
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Amzal H, Alaoui K, Tok S, Errachidi A, Charof R, Cherrah Y, Benjouad A. Protective effect of saponins from Argania spinosa against free radical-induced oxidative haemolysis. Fitoterapia 2008; 79:337-44. [PMID: 18514434 DOI: 10.1016/j.fitote.2008.03.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2006] [Accepted: 03/26/2008] [Indexed: 10/22/2022]
Abstract
Saponins from Argania spinosa at a non-haemolytic concentration diminish by 53.2% erythrocyte haemolysis induced by free radicals. 2 mM aspirin and acetaminophen diminish by 75% and 68% , respectively, erythrocyte haemolysis induced by free radicals, while 0.3 microM vitamin E shows no significant antioxidant activity. Interestingly, a combination of 1 mg/l of A. spinosa saponins and vitamin E at 0.3 microM resulted in a 68% level of protection against free radical-induced erythrocyte haemolysis, which may suggest that A. spinosa saponins enhance the antioxidant effect of vitamin E. In contrast, no synergic effect was observed for acetaminophen (2 mM) when in combination with vitamin E (0.3 microM). These results demonstrate the antioxidant properties of saponins from A. spinosa and their ability to potentate the antioxidant effect of vitamin E.
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Affiliation(s)
- H Amzal
- Laboratoire de Biochimie et Immunologie, Faculté des Sciences, Avenue Ibn Batouta, BP 1014 Rabat, Morocco
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Yülek F, Or M, Ozoğul C, Isik AC, Ari N, Stefek M, Bauer V, Karasu C. Effects of stobadine and vitamin E in diabetes-induced retinal abnormalities: involvement of oxidative stress. Arch Med Res 2007; 38:503-11. [PMID: 17560455 DOI: 10.1016/j.arcmed.2007.02.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2006] [Accepted: 02/20/2007] [Indexed: 11/21/2022]
Abstract
BACKGROUND Because hyperglycemia-induced oxidative stress may be a cause of retinopathy, this study examined the hypothesis that administration of exogenous antioxidants, stobadine (ST) and vitamin E (vitE), can restore retinal abnormalities in experimental diabetes. METHODS Normal and streptozotocin (STZ)-induced male Wistar rats received daily intraoral doses of ST (24.7 mg/kg) and vitE (alpha-dl-tocopherol acetate, 400-500 IU/kg) individually or in combinations for 8 months. The biochemical parameters including aldose reductase enzyme (AR) activity and lipid peroxidation (MDA), and histopathological changes such as retinal capillary basement membrane thickness (RCBMT) and vascular endothelial growth factor (VEGF) expression were evaluated. RESULTS A 37.99% increase in RCBMT was observed in rats after 8 months diabetes duration. The increase in RCBMT was 12.34% in diabetic rats treated with ST and 23.07% in diabetic rats treated with vitE. In diabetic rats treated with antioxidant combination, just a 4.38% increase was observed in RCBMT. The excess VEGF immunoreactivity and increased MDA and AR activity determined in diabetic retina were significantly attenuated by individual antioxidant treatments. Although both antioxidants decreased blood glucose, HbA1c, fructosamine and triglyceride levels in diabetic rats, poor glycemic control was maintained in all experimental groups during the treatment period. However, the antioxidant combination led to almost complete amelioration in retinal MDA and RCBMT in diabetic rats. CONCLUSIONS The ability of antioxidant combination to arrest retinal abnormalities and lipid peroxidation even in the presence of poor glycemic control might advocate the key role of direct oxidative damage and the protective action of antioxidants in retinal alterations associated with diabetic retinopathy.
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Affiliation(s)
- Fatma Yülek
- Department of Ophthalmalogy, Gazi University, Besevler, Ankara, Turkey
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Argüelles S, Machado A, Ayala A. 'In vitro' protective effect of a hydrophilic vitamin E analogue on the decrease in levels of elongation factor 2 in conditions of oxidative stress. Gerontology 2007; 53:282-8. [PMID: 17510559 DOI: 10.1159/000102948] [Citation(s) in RCA: 186] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2007] [Accepted: 02/20/2007] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Protein synthesis is inhibited by oxidative stress. Among the possible causes of this inhibition are the modifications of elongation factor 2 (eEF-2), the protein that catalyzes the translocation of the ribosome through mRNA. eEF-2 is extremely sensitive to oxidative stress caused mainly by lipid peroxidant compounds such as cumene hydroperoxide (CH). OBJECTIVE The purpose of this study was to determine whether the antioxidant Trolox prevents the effect of CH on the levels of hepatic eEF-2. METHODS The effect was determined in liver homogenates treated with both compounds. Lipid peroxides and carbonyl content were also measured. RESULTS The results show that Trolox at certain doses prevents the decrease in the level of eEF-2 caused by CH. CONCLUSION Under oxidative stress circumstances, vitamin E can prevent the effect of oxidations on relevant biological processes such as protein synthesis.
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Affiliation(s)
- Sandro Argüelles
- Departamento de Bioquímica, Bromatología y Toxicología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, España
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Abstract
PURPOSE This review aims to provide a literature survey of the association between photo-oxidation of lens proteins and lipid peroxidation with the genesis of age-related cataract in laboratory studies using rodent models, in epidemiological and interventional studies in humans. MATERIALS AND METHODS A Medline search using initial search terms lens, oxidation, antioxidant, and diet was employed to search for research papers covering the areas noted above from 1995 to 2005. Literature cited in those papers was also reviewed to provide as comprehensive a coverage of research work as possible. RESULTS Lens protein photo-oxidation and lipid peroxidation are widely acknowledged as important steps in age-related cataractogenesis. Dietary antioxidants are central in retarding cataractogenesis, although most evidence for this is gained from laboratory-based work on relatively unphysiologic rodent cataract models, using antioxidant regimes that could not be sustained in clinical practice. Most research in humans is retrospective epidemiology although some interventional research has been undertaken, with mixed results. CONCLUSIONS Dietary antioxidants are likely to be important in retarding cataractogenesis in older animals and in humans. Work on companion animals could provide a valuable stepping stone between rodent-based laboratory work and human interventional studies.
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Affiliation(s)
- David L Williams
- Department of Clinical Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 OES, England, UK.
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