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Khallouki F, Saber S, Bouddine T, Hajji L, Elbouhali B, Silvente-Poirot S, Poirot M. In vitro and In vivo oxidation and cleavage products of tocols: From chemical tuners to “VitaminEome” therapeutics. A narrative review. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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2
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Niki E, Noguchi N. Antioxidant action of vitamin E in vivo as assessed from its reaction products with multiple biological oxidants. Free Radic Res 2021; 55:352-363. [PMID: 33327809 DOI: 10.1080/10715762.2020.1866181] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Vitamin E acts as essential antioxidant against detrimental oxidation of biological molecules induced by multiple reactive species. To gain more insight into the physiological role of vitamin E, the levels of its oxidation products in humans under normal and pathological conditions were compared. α-Tocopherol quinone (α-TQ) and 5-nitro-γ-tocopherol (5-NgT) were focused. α-TQ is produced by multiple oxidants including oxygen radicals, peroxynitrite, hypochlorite, singlet oxygen, and ozone, while 5-NgT is produced by nitrogen dioxide radical derived from peroxynitrite and the reaction of nitrite and hypochlorite. The reported concentrations of α-TQ and 5-NgT in healthy human plasma are highly variable ranging from 15 to 360 and 4 to 170 nM, respectively. In general, the molar ratio 5-NgT/γ-tocopherol was higher than the ratio α-TQ/α-tocopherol. Both absolute concentrations of α-TQ and 5-NgT and the molar ratios to the parent tocopherols were elevated significantly in the plasma of patients with various diseases compared with healthy subjects except neurological diseases. The molar ratios of the products to the respective parent compounds decreased in the order of 5-NgT/γ-tocopherol > α-TQ/α-tocopherol > hydroxyoctadecadienoate/linoleate > 3-nitrotyrosine/tyrosine > isoprostane/arachidonate. The molar ratios of nitrated products to the respective parent compounds in human plasma are approximately 10-2 for 5-NgT and 10-5 for 3-nitrotyrosine, nitro-oleic acid, and 8-nitroguaine. These data indicate that vitamin E acts as an important physiological antioxidant and that α-TQ and 5-NgT represent biomarker for oxidative stress and nitrative stress respectively.
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Affiliation(s)
- Etsuo Niki
- Research Center for Advanced Science and Technology, University of Tokyo, Komaba, Japan
| | - Noriko Noguchi
- Faculty of Life and Medical Sciences, Doshisha University, Kyoto, Japan
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Kobayashi M, Muramatsu K, Haruyama T, Uesugi H, Kikuchi A, Konno H, Noguchi N, Saito Y. Polymerization of Oxidized DJ-1 via Noncovalent and Covalent Binding: Significance of Disulfide Bond Formation. ACS OMEGA 2019; 4:9603-9614. [PMID: 31460051 PMCID: PMC6648325 DOI: 10.1021/acsomega.9b00324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 05/21/2019] [Indexed: 02/08/2023]
Abstract
The reactive cysteine residue at position 106 (Cys106) of DJ-1 is preferentially oxidized under oxidative stress, generating oxidized DJ-1 (oxDJ-1). Oxidation of Cys106 to sulfinic acid changes the biologic action of DJ-1 and increases its cytoprotective properties. The similar activation step is known in peroxiredoxins (Prxs), in which oxidation of reactive Cys to sulfinic acid induces polymerization of Prxs and changes its enzyme characteristic from peroxidase to molecular chaperone. In the present study, oxDJ-1 was prepared and its polymerization and related amino acid residues were investigated. We found that oxDJ-1 formed a characteristic polymer with disulfide bonds and with noncovalent and covalent binding other than disulfide. The physiological concentration of glutathione resolved the polymer form of oxDJ-1, and glutathionylation of other two Cys residues, such as Cys 46 and 53, was detected. Mutant analysis indicated the necessity not only of Cys106 but also of Cys46 for the polymer formation. The cellular experiment demonstrated that the electrophilic quinone treatment induced a high-molecular-weight complex containing oxDJ-1. Dynamic polymerization of oxDJ-1 with a ring and a stacked structure was observed by an atomic force microscope. Collectively, these results clearly demonstrated the characteristic polymer formation of oxDJ-1 with a disulfide bond and noncovalent and covalent binding other than disulfide, which might be related to the biologic function of oxDJ-1.
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Affiliation(s)
- Mayuka Kobayashi
- The Systems Life Sciences Laboratory, Department of Life and Medical Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan
| | - Kana Muramatsu
- The Systems Life Sciences Laboratory, Department of Life and Medical Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan
| | - Takamitsu Haruyama
- Nano Life Science Institute (WPI NanoLSI), Kanazawa University, Kanazawa 920-1192, Japan
- Nara Institute of Science and Technology, Nara 630-0192, Japan
| | - Haruka Uesugi
- The Systems Life Sciences Laboratory, Department of Life and Medical Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan
| | - Ai Kikuchi
- The Systems Life Sciences Laboratory, Department of Life and Medical Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan
| | - Hiroki Konno
- Nano Life Science Institute (WPI NanoLSI), Kanazawa University, Kanazawa 920-1192, Japan
| | - Noriko Noguchi
- The Systems Life Sciences Laboratory, Department of Life and Medical Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan
| | - Yoshiro Saito
- The Systems Life Sciences Laboratory, Department of Life and Medical Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyoto 610-0394, Japan
- Laboratory of Molecular Biology and Metabolism, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
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Alberdi-Cedeño J, Ibargoitia ML, Guillén MD. Monitoring of minor compounds in corn oil oxidation by direct immersion-solid phase microextraction-gas chromatography/mass spectrometry. New oil oxidation markers. Food Chem 2019; 290:286-294. [PMID: 31000049 DOI: 10.1016/j.foodchem.2019.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 03/30/2019] [Accepted: 04/01/2019] [Indexed: 01/10/2023]
Abstract
The aim of this study is to shed light on the evolution of the minor compounds in the corn oil oxidation process, through the information provided by direct immersion-microextraction in solid phase followed by gas chromatography/mass spectrometry (DI-SPME-GC/MS). This methodology enables one, in a single run, to establish the identity and abundance both of original oil minor components, some with antioxidant capacity, and of other compounds coming from both main and minor oil components oxidation. For the first time, some of the compounds formed from oil minor components degradation are proposed as new markers of oil incipient oxidation. Although the study refers to corn oil, the methodology can be applied to any other edible oil and constitutes a new approach to characterizing the oxidation state of edible oils.
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Affiliation(s)
- J Alberdi-Cedeño
- Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV-EHU), Paseo de la Universidad n° 7, 01006 Vitoria-Gasteiz, Spain.
| | - María L Ibargoitia
- Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV-EHU), Paseo de la Universidad n° 7, 01006 Vitoria-Gasteiz, Spain.
| | - María D Guillén
- Food Technology, Faculty of Pharmacy, Lascaray Research Center, University of the Basque Country (UPV-EHU), Paseo de la Universidad n° 7, 01006 Vitoria-Gasteiz, Spain.
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Kreps F, Burčová Z, Schmidt Š. Degradation of fatty acids and tocopherols to form tocopheryl quinone as risk factor during microwave heating, pan‐frying and deep‐fat frying. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201600309] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- František Kreps
- Faculty of Chemical and Food Technology, Department of Food Science and TechnologySlovak University of Technology in BratislavaBratislavaSlovak Republic
| | - Zuzana Burčová
- Faculty of Chemical and Food Technology, Department of Food Science and TechnologySlovak University of Technology in BratislavaBratislavaSlovak Republic
| | - Štefan Schmidt
- Faculty of Chemical and Food Technology, Department of Food Science and TechnologySlovak University of Technology in BratislavaBratislavaSlovak Republic
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Tang CB, Zhang WG, Wang YS, Xing LJ, Xu XL, Zhou GH. Identification of Rosmarinic Acid-Adducted Sites in Meat Proteins in a Gel Model under Oxidative Stress by Triple TOF MS/MS. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:6466-76. [PMID: 27486909 DOI: 10.1021/acs.jafc.6b02438] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Triple TOF MS/MS was used to identify adducts between rosmarinic acid (RosA)-derived quinones and meat proteins in a gel model under oxidative stress. Seventy-five RosA-modified peptides responded to 67 proteins with adduction of RosA. RosA conjugated with different amino acids in proteins, and His, Arg, and Lys adducts with RosA were identified for the first time in meat. A total of 8 peptides containing Cys, 14 peptides containing His, 48 peptides containing Arg, 64 peptides containing Lys, and 5 peptides containing N-termini that which participated in adduction reaction with RosA were identified, respectively. Seventy-seven adduction sites were subdivided into all adducted proteins including 2 N-terminal adduction sites, 3 Cys adduction sites, 4 His adduction sites, 29 Arg adduction sites, and 39 Lys adduction sites. Site occupancy analyses showed that approximately 80.597% of the proteins carried a single RosA-modified site, 14.925% retained two sites, 1.492% contained three sites, and the rest 2.985% had four or more sites. Large-scale triple TOF MS/MS mapping of RosA-adducted sites reveals the adduction regulations of quinone and different amino acids as well as the adduction ratios, which clarify phenol-protein adductions and pave the way for industrial meat processing and preservation.
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Affiliation(s)
- Chang-Bo Tang
- Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
- Department of Food Nutrition and Detection, College of Education and Humanity, Suzhou Vocational University , Suzhou 215104, China
| | - Wan-Gang Zhang
- Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
| | - Yao-Song Wang
- College of Light Industry Science and Engineering, Nanjing Forestry University , Nanjing 210037, China
| | - Lu-Juan Xing
- Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
| | - Xing-Lian Xu
- Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
| | - Guang-Hong Zhou
- Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, China
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Tang CB, Zhang WG, Dai C, Li HX, Xu XL, Zhou GH. Identification and quantification of adducts between oxidized rosmarinic acid and thiol compounds by UHPLC-LTQ-Orbitrap and MALDI-TOF/TOF tandem mass spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:902-11. [PMID: 25541907 DOI: 10.1021/jf5044713] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
LTQ Orbitrap MS/MS was used to identify the adducts between quinones derived from rosmarinic acid (RosA) and thiol compounds, including cysteine (Cys), glutathione (GSH), and peptides digested from myosin. Two adducts of quinone-RosA/Cys and quinone-RosA/2Cys, one quinone-RosA/GSH adduct, and three quinone-RosA/peptide adducts were identified by extracted ion and MS(2) fragment ion chromatograms. By using MALDI-TOF/TOF MS, the adduction reaction between RosA and myosin in myofibrillar protein isolates was determined, demonstrating that the accurate reaction site was at Cys949 of myosin. The effect of reaction conditions, including stirring time, temperature, and oxidative stress, on the formation of adducts was further investigated. The formation of quinone-RosA/Cys and quinone-RosA/GSH increased with stirring time. Both adducts increased with temperature, whereas the reactivity of the addition reaction of GSH was higher than that of Cys. With increasing oxidation stress, the formation of quinone-RosA/GSH adduct increased and that of quinone-RosA/Cys adduct decreased.
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Affiliation(s)
- Chang-bo Tang
- Synergetic Innovative Center of Food Safety and Nutrition, Key Laboratory of Meat Processing and Quality Control, Ministry of Education, and Key Laboratory of Animal Products Processing, Ministry of Agriculture, College of Food Science and Technology, Nanjing Agricultural University , Nanjing 210095, People's Republic of China
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Dose-dependent metabolic disposition of hydroxytyrosol and formation of mercapturates in rats. Pharmacol Res 2013; 77:47-56. [DOI: 10.1016/j.phrs.2013.09.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 09/04/2013] [Accepted: 09/05/2013] [Indexed: 11/30/2022]
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Büsing A, Drotleff AM, Ternes W. Identification of α-tocotrienolquinone epoxides and development of an efficient molecular distillation procedure for quantitation of α-tocotrienol oxidation products in food matrices by high-performance liquid chromatography with diode array and fluorescence detection. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:8302-8313. [PMID: 22747466 DOI: 10.1021/jf301137b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The aim of this study was to investigate the most important oxidation products of α-tocotrienol (α-T3) along with other tocochromanols in lipid matrices and tocotrienol-rich foods. For this purpose, an efficient molecular distillation procedure was developed for the extraction of analytes, and α-T3-spiked and thermally oxidized natural lipids (lard and wheat germ oil) and α-T3-rich foods (wholemeal rye bread and oil from dried brewer's spent grain) were investigated through HPLC-DAD-F. The following α-T3 oxidation products were extractable from lipid matrices along with tocochromanols: α-tocotrienolquinone (α-T3Q), α-tocotrienolquinone-4a,5-epoxide (α-T3Q-4a,5-E), α-tocotrienolquinone-7,8-epoxide (α-T3Q-7,8-E), 7-formyl-β-tocotrienol (7-FβT3), and 5-formyl-γ-tocotrienol (5-FγT3). Recovery rates were as high as 88% and enrichment factors up to 124. The proposed method allows the investigation of α-T3Q, α-T3Q-4a,5-E, α-T3Q-7,8-E, 7-FβT3, and 5-FγT3 in small quantities (<0.78 μg/g) in lipid matrices, which is necessary for the investigation and analysis of the formation kinetics of these oxidation products in fat, oils, and tocotrienol-rich foods.
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Affiliation(s)
- Anne Büsing
- Department of Analytical Chemistry, Institute of Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover , Foundation, Bischofsholer Damm 15, D-30173 Hannover, Germany
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Miyama A, Saito Y, Yamanaka K, Hayashi K, Hamakubo T, Noguchi N. Oxidation of DJ-1 induced by 6-hydroxydopamine decreasing intracellular glutathione. PLoS One 2011; 6:e27883. [PMID: 22132160 PMCID: PMC3221727 DOI: 10.1371/journal.pone.0027883] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Accepted: 10/27/2011] [Indexed: 02/08/2023] Open
Abstract
DJ-1, the causative gene of a familial form of Parkinson's disease (PD), has been reported to undergo preferential oxidation of the cysteine residue at position 106 (Cys-106) under oxidative stress; however, details of the molecular mechanisms are not well known. In the present study, mechanisms of DJ-1 oxidation induced by 6-hydroxydopamine (6-OHDA) were investigated by using SH-SY5Y cells. The treatment of these cells with 6-OHDA caused an obvious acidic spot sift of DJ-1 due to its oxidation. However, when catalase, which is an hydrogen peroxide (H(2)O(2))-removing enzyme, was added during the treatment, it failed to prevent the oxidation induced by 6-OHDA, suggesting that electrophilic p-quinone formed from 6-OHDA, but not H(2)O(2), was responsible for the DJ-1 oxidation. Benzoquinone, another electrophilic p-quinone, also induced DJ-1 oxidation. The intracellular glutathione (GSH) levels were significantly decreased by 6-OHDA, irrespective of the presence or absence of catalase. The inhibition of GSH synthesis by buthionine sulfoximine resulted in a decrease in GSH levels and enhancement of DJ-1 oxidation. The pretreatment of cells with N-acetyl-cysteine prevented the loss of intracellular GSH and subsequently DJ-1 oxidation induced by 6-OHDA. Collectively, these results suggest that electrophilic p-quinone formed from 6-OHDA induces DJ-1 oxidation by decreasing intracellular GSH.
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Affiliation(s)
- Akiko Miyama
- Department of Medical Life Systems, Faculty of Medical and Life Sciences, Doshisha University, Tatara, Kyotanabe, Kyoto, Japan
| | - Yoshiro Saito
- Department of Medical Life Systems, Faculty of Medical and Life Sciences, Doshisha University, Tatara, Kyotanabe, Kyoto, Japan
- * E-mail: (YS); (NN)
| | - Kazunori Yamanaka
- Department of Medical Life Systems, Faculty of Medical and Life Sciences, Doshisha University, Tatara, Kyotanabe, Kyoto, Japan
| | - Kojiro Hayashi
- Department of Medical Life Systems, Faculty of Medical and Life Sciences, Doshisha University, Tatara, Kyotanabe, Kyoto, Japan
| | - Takao Hamakubo
- Laboratory of Systems Biology and Medicine, Research Center for Advanced Science and Technology, University of Tokyo, Meguro-ku, Tokyo, Japan
| | - Noriko Noguchi
- Department of Medical Life Systems, Faculty of Medical and Life Sciences, Doshisha University, Tatara, Kyotanabe, Kyoto, Japan
- * E-mail: (YS); (NN)
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Gu M, Imlay JA. The SoxRS response of Escherichia coli is directly activated by redox-cycling drugs rather than by superoxide. Mol Microbiol 2011; 79:1136-50. [PMID: 21226770 DOI: 10.1111/j.1365-2958.2010.07520.x] [Citation(s) in RCA: 177] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
When Escherichia coli is exposed to redox-cycling drugs, its SoxR transcription factor is activated by oxidation of its [2Fe-2S] cluster. In aerobic cells these drugs generate superoxide, and because superoxide dismutase (SOD) is a member of the SoxRS regulon, superoxide was initially thought to be the activator of SoxR. Its many-gene regulon was therefore believed to comprise a defence against superoxide stress. However, we found that abundant superoxide did not effectively activate SoxR in an SOD⁻ mutant, that overproduced SOD could not suppress activation by redox-cycling drugs, and that redox-cycling drugs were able to activate SoxR in anaerobic cells as long as alternative respiratory acceptors were provided. Thus superoxide is not the signal that SoxR senses. Indeed, redox-cycling drugs directly oxidized the cluster of purified SoxR in vitro, while superoxide did not. Redox-cycling drugs are excreted by both bacteria and plants. Their toxicity does not require superoxide, as they poisoned E. coli under anaerobic conditions, in part by oxidizing dehydratase iron-sulfur clusters. Under these conditions SoxRS induction was protective. Thus it is physiologically appropriate that the SoxR protein directly senses redox-cycling drugs rather than superoxide.
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Affiliation(s)
- Mianzhi Gu
- Department of Microbiology, University of Illinois, Urbana, IL 61801, USA
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Akazawa YO, Saito Y, Nishio K, Horie M, Kinumi T, Masuo Y, Yoshida Y, Ashida H, Niki E. Proteomic characterization of the striatum and midbrain treated with 6-hydroxydopamine: alteration of 58-kDa glucose-regulated protein and C/EBP homologous protein. Free Radic Res 2010; 44:410-21. [PMID: 20109102 DOI: 10.3109/10715760903536349] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The present study performed proteomic analysis of the midbrain and striatum of 6-hydroxydopamine (6-OHDA)-treated neonatal rats--a model of attention-deficit hyperactivity disorder (ADHD). Proteomic analysis revealed that a 58-kDa glucose-regulated protein (Grp58) was temporarily phosphorylated and its level was elevated by 6-OHDA. Furthermore, 6-OHDA increased the expression level of C/EBP homologous protein (CHOP), a mediator of endoplasmic reticulum (ER) stress response, in the midbrain and striatum. In vitro experiments using PC12 cells revealed that 6-OHDA or hydrogen peroxide could induce the elevation of Grp58 and CHOP. 6-OHDA could induce the elevation of Grp58 and CHOP in the presence of catalase, a hydrogen peroxide-removing enzyme, suggesting that the elevation of Grp58 and CHOP are induced by both hydrogen peroxide and p-quinone generated by 6-OHDA. Collectively, these findings suggest that ER stress involving the alteration of Grp58 and CHOP play a significant role in the induction of insults by 6-OHDA in vivo.
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Affiliation(s)
- Yoko Ogawa Akazawa
- Health Technology Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Kansai Center, Ikeda, Osaka, Japan
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Tundis R, Loizzo MR, Bonesi M, Menichini F, Dodaro D, Passalacqua NG, Statti G, Menichini F. In vitrocytotoxic effects ofSenecio stabianusLacaita (Asteraceae) on human cancer cell lines. Nat Prod Res 2009; 23:1707-18. [DOI: 10.1080/14786410802194151] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Cornwell DG, Ma J. Nutritional benefit of olive oil: the biological effects of hydroxytyrosol and its arylating quinone adducts. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:8774-8786. [PMID: 18783241 DOI: 10.1021/jf8015877] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Olive oil is the essential component of the Mediterranean diet, a nutritional regimen gaining ever-increasing renown for its beneficial effects on inflammation, cardiovascular disease, and cancer. A unique characteristic of olive oil is its enrichment in oleuropein, a member of the secoiridoid family, which hydrolyzes to the catechol hydroxytyrosol and functions as a hydrophilic phenolic antioxidant that is oxidized to its catechol quinone during redox cycling. Little effort has been spent on exploring the biological properties of the catechol hydroxytyrosol quinone, a strong arylating electrophile that forms Michael adducts with thiol nucleophiles in glutathione and proteins. This study compares the chemical and biological characteristics of hydroxytyrosol with those of the tocopherol family in which Michael adducts of arylating desmethyltocopherol quinones have been identified and correlated with biologic properties including cytotoxicity and induction of endoplasmic reticulum stress. It is noted that hydroxytyrosol and desmethyltocopherols share many similarities, suggesting that Michael adduct formation by an arylating quinone electrophile may contribute to the biological properties of both families, including the unique nutritional benefit of olive oil.
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Affiliation(s)
- David G Cornwell
- Department of Molecular and Cellular Biochemistry, College of Medicine, The Ohio State University, Columbus, Ohio 43210, USA.
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Ogawa Y, Saito Y, Nishio K, Yoshida Y, Ashida H, Niki E. Gamma-tocopheryl quinone, not alpha-tocopheryl quinone, induces adaptive response through up-regulation of cellular glutathione and cysteine availability via activation of ATF4. Free Radic Res 2008; 42:674-87. [PMID: 18654882 DOI: 10.1080/10715760802277396] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
alpha-Tocopheryl quinone (alpha-TQ) and gamma-TQ are oxidized metabolites of the corresponding tocopherol (T) isoforms, which are vitamin E homologues. Unlike alpha-TQ, gamma-TQ functions as an arylating agent that reacts with nucleophiles such as reduced sulphydryl groups and it has unique biological properties such as high toxicity. Increasing evidence indicates that reactive oxygen species and other physiologically existing oxidative stimuli upregulate the antioxidant system, thereby triggering the adaptive response. The present study used PC12 cells and immature primary cortical cells to examine the possible adaptive cytoprotective effects of gamma-TQ against oxidative stress. Pre-treatment with gamma-TQ at sub-lethal concentrations resulted in cytoprotective effects against oxidative stress. gamma-TQ induced a significant increase in the cellular glutathione (GSH) levels while alpha-TQ did not. gamma-TQ did not induce any considerable change in the activity of glutamate-cysteine ligase (GCL), the rate-limiting enzyme in GSH synthesis, whereas it increased the cellular GSH levels by facilitating the availability of cysteine through the induction of xCT, which is the core sub-unit of the x(c)(-) high-affinity cystine transporter system. An activating transcription factor 4 (ATF4)-small interfering RNA effectively attenuated the xCT mRNA level as well as the increase in cellular cysteine levels induced by gamma-TQ, while the NF-E2-related factor (Nrf2)-small interfering RNA treatment did not. Collectively, these findings indicate that gamma-TQ acts as a signal messenger to induce adaptive response through the upregulation of intracellular GSH synthesis via transcriptional activation of ATF4 in order to cope with the forthcoming oxidative insult.
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Affiliation(s)
- Yoko Ogawa
- Human Stress Signal Research Center (HSSRC), National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka, Japan
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Loizzo MR, Tundis R, Statti GA, Menichini F. Jacaranone: A cytotoxic constituent fromsenecio ambiguus subsp.ambiguus (Biv.) DC. Against renal adenocarcinoma achn and prostate carcinoma LNCaP cells. Arch Pharm Res 2007; 30:701-7. [PMID: 17679547 DOI: 10.1007/bf02977631] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Senecio ambiguus subsp. ambiguus (Biv.) DC. extracts were able to inhibit the in vitro proliferation of renal cell adenocarcinoma ACHN and hormone dependent prostate carcinoma LNCaP. The potential cytotoxic property of the plant was revealed by the methanolic extract action against LNCaP (IC50 of 5.51 microg/mL) and ACHN (IC50 of 38.95 microg/mL). The most potent cytotoxic activity (IC50 of 5.34 microg/mL against the prostate carcinoma cell line) was exerted by the dichloromethane extract. Through bioassay-guided fractionation of the dichloromethane extract jacaranone was isolated as the major active constituent. This quinoid showed a very strong activity against ACHN and LNcaP with IC50 of 4.32 and 7.39 microg/mL, respectively. Its structure was established by GC/MS and NMR analysis. The n-hexane extract showed an interesting inhibition on the proliferation of tumor cell lines an IC50 value of 5.23 microg/mL against LNCaP. Three compounds identified in the n-hexane extract such as nerolidol, a-humulene and g-tocopherol were found to be active aginst LNCAP with IC50 values ranged from 11.24 to 15.56 microg/mL.
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Affiliation(s)
- Monica Rosa Loizzo
- Department of Pharmaceutical Sciences, University of Calabria, 1-87036 Arcavata di Rende, CS, Italy.
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Cornwell DG, Ma J. Studies in Vitamin E: Biochemistry and Molecular Biology of Tocopherol Quinones. VITAMIN E 2007; 76:99-134. [PMID: 17628173 DOI: 10.1016/s0083-6729(07)76005-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Tocopherols and tocotrienols, parent congeners in the vitamin E family, function as phenolic antioxidants. However, there has been little interest in their quinone electrophiles formed as a consequence of oxidation reactions, even though unique biological properties were suggested by early studies conducted immediately after the discovery of vitamin E. Oxidation of tocopherols and tocotrienols produces para- and ortho-quinones, and quinone methides, while oxidation of their carboxyethyl hydroxychroman derivatives produces quinone lactones. These quinone electrophiles are grouped in two subclasses, the nonarylating fully methylated alpha-family and the arylating desmethyl beta-, gamma-, and delta-family. Arylating quinone electrophiles form Michael adducts with thiol nucleophiles, provided by cysteinyl proteins or peptides, which can be identified and quantified by tetramethylammonium hydroxide thermochemolysis. They have striking biological properties which differ significantly from their nonarylating congeners. They are highly cytotoxic, inducing characteristic apoptotic changes in cultured cells. Cytotoxicity is intimately associated with the induction of endoplasmic reticulum stress and a consequent unfolded protein response involving the pancreatic ER kinase (PERK) signaling pathway that commits overstressed cells to apoptosis. The step-function difference between arylating and nonarylating tocopherol quinones is conceivably the basis for distinct biological properties of parent tocopherols, including the epigenetic modification of a histone thiol, the ceramide pathway, natriuresis, and the activity of COX-2, NF-kappaB, PPARgamma, and cyclin. The role of alpha-tocopherol in the origin and evolution of the western hominin diet, the so-called "Mediterranean" diet, and the prominence of alpha-tocopherol in colostrum, mother's milk, and infant nutrition are considered. Finally, the discordance introduced into the diet by arylating tocopherol quinone precursors through the wide use of vegetable oils in deep-frying is recognized.
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Affiliation(s)
- David G Cornwell
- Department of Molecular and Cellular Biochemistry, The Ohio State University College of Medicine, Columbus, Ohio 43210, USA
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Wang X, Thomas B, Sachdeva R, Arterburn L, Frye L, Hatcher PG, Cornwell DG, Ma J. Mechanism of arylating quinone toxicity involving Michael adduct formation and induction of endoplasmic reticulum stress. Proc Natl Acad Sci U S A 2006; 103:3604-9. [PMID: 16505371 PMCID: PMC1450130 DOI: 10.1073/pnas.0510962103] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Quinones permeate our biotic environment, contributing to both homeostasis and cytotoxicity. All quinones generate reactive oxygen species through redox cycling, while partially substituted quinones also undergo arylation (Michael adduct formation) yielding covalent bonds with nucleophiles such as cysteinyl thiols. In contrast to reactive oxygen species, the role of arylation in quinone cytotoxicity is not well understood. We found that the arylating quinones, including unsubstituted 1,4-benzoquinone (1,4-BzQ) and partially substituted vitamin E congener gamma-tocopherol quinone (gamma-TQ), were cytotoxic, with gamma-TQ > 1,4-BzQ, whereas the fully substituted nonarylating vitamin E congener alpha-tocopherol quinone was not. In vitro, both arylating quinones formed Michael adducts with the thiol nucleophile N-acetylcysteine (NAC) at rates where 1,4-BzQ > gamma-TQ. In cultured cells, concurrent addition of NAC eliminated 1,4-BzQ caused toxicity, but preincubation was required for the same NAC detoxification effect on gamma-TQ. These data clearly established the role of arylation in quinone toxicity and revealed that arylating quinone structure affects cytotoxicity by governing detoxification through the rate of adduct formation. Furthermore, arylating quinones induced endoplasmic reticulum (ER) stress by activating the pancreatic ER kinase (PERK) signaling pathway including elF2alpha, ATF4, and C/EBP homologous protein (CHOP). Detoxification by NAC greatly attenuates CHOP induction in arylating quinone-treated cells, suggesting that ER stress is a cellular mechanism for arylating quinone cytotoxicity.
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Affiliation(s)
- Xinhe Wang
- Departments of *Molecular and Cellular Biochemistry and
| | - Beena Thomas
- Chemistry, Ohio State University, Columbus, OH 43210
| | | | | | - Lucy Frye
- Departments of *Molecular and Cellular Biochemistry and
| | | | - David G. Cornwell
- Departments of *Molecular and Cellular Biochemistry and
- To whom correspondence may be addressed at:
Department of Molecular and Cellular Biochemistry, Ohio State University, 1645 Neil Avenue, Columbus, OH 43210. E-mail:
or
| | - Jiyan Ma
- Departments of *Molecular and Cellular Biochemistry and
- To whom correspondence may be addressed at:
Department of Molecular and Cellular Biochemistry, Ohio State University, 1645 Neil Avenue, Columbus, OH 43210. E-mail:
or
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