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Platt CI, Stewart-McGuinness C, Eckersley A, Wilkins L, Sherratt MJ. Acute exposure to ultraviolet radiation targets proteins involved in collagen fibrillogenesis. Front Physiol 2024; 15:1352161. [PMID: 38559576 PMCID: PMC10978599 DOI: 10.3389/fphys.2024.1352161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 02/19/2024] [Indexed: 04/04/2024] Open
Abstract
Introduction: Exposure to chronic, low-dose UV irradiation (UVR) can lead to premature ageing of the skin. Understanding which proteins are affected by acute UVR and photo-dynamically produced reactive oxygen species (ROS) could help to inform strategies to delay photoageing. Conventional biochemical analyses can be used to characterize UVR/ROS-induced damage on a protein-by-protein basis and we have previously shown using SDS-PAGE that collagen I and plasma fibronectin are respectively resistant and susceptible to physiological doses of UVR. The aim of this study was to screen a complex proteome for UVR-affected proteins. Methods: This study employed a sensitive mass spectrometry technique (peptide location fingerprinting: PLF) which can identify structure associated differences following trypsin digestion to characterize the impact of UVR exposure on purified collagen I and tissue fibronectin and to identify UVR-susceptible proteins in an ECM-enriched proteome. Results: Using LC/MS-MS and PLF we show that purified mature type-I collagen is resistant to UVR, whereas purified tissue fibronectin is susceptible. UV irradiation of a human dermal fibroblast-deposited ECM-enriched proteome in vitro, followed by LC/MS-MS and PLF analysis revealed two protein cluster groups of UV susceptible proteins involved in i) matrix collagen fibril assembly and ii) protein translation and motor activity. Furthermore, PLF highlighted UV susceptible domains within targeted matrix proteins, suggesting that UV damage of matrix proteins is localized. Discussion: Here we show that PLF can be used to identify protein targets of UVR and that collagen accessory proteins may be key targets in UVR exposed tissues.
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Affiliation(s)
- Christopher I. Platt
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Science, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Callum Stewart-McGuinness
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Science, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Alexander Eckersley
- Division of Musculoskeletal & Dermatological Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Loren Wilkins
- School of Medical Sciences, The University of Manchester, Manchester, United Kingdom
| | - Michael J. Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Science, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
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Kostin GA, Tolstikov SE, Kuratieva NV, Nadolinny VA, Ovcharenko VI. FIRST EXAMPLE OF RUTHENIUM NITROSO COMPLEXES WITH A NITROXYL RADICAL AS A LIGAND. J STRUCT CHEM+ 2023. [DOI: 10.1134/s0022476623020014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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3
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Mołoń M, Szlachcikowska D, Stępień K, Kielar P, Galiniak S. Two faces of TEMPO (2,2,6,6-tetramethylpiperidinyl-1-oxyl) - An antioxidant or a toxin? BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119412. [PMID: 36529401 DOI: 10.1016/j.bbamcr.2022.119412] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/04/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022]
Abstract
2,2,6,6-Tetramethylpiperidine-1-oxyl, commonly known as TEMPO, is one of the compounds called nitroxides that are used in the chemical industry for synthesis of many organic compounds as well as for electrodes in all-organic radical batteries. Additionally, TEMPO is a widely used antioxidant in scientific studies. Technological progress and simultaneous care for the environment leads to resorting to new industrial methods which require the use of compounds that have not been fully tested for their impact on living organisms. Therefore, TEMPO may be an environmental pollutant and its effect on living organisms is not fully understood. The aim of our study was to determine the influence of TEMPO on the physiology, chronological lifespan and wide transcription changes of a eukaryotic model organism, namely the Saccharomyces cerevisiae yeast. For this purpose, we used the BY4741 wild-type and isogenic mutants with a disorder in the response to oxidative stress (sod1Δ, sod2Δ, yap1Δ) and repair of DNA damage (rad52Δ). We showed that supplementation with TEMPO inhibited the cell growth rate of all analyzed strains while simultaneously slowing down the aging of post-mitotic cells in the yeast population. In addition, TEMPO-treated yeast cells manifested a significantly increased level of metabolism in the wild-type and sod2Δ strains. TEMPO also displayed genoprotective effect by reducing the number of DNA double-strand breaks in cells. Here, we are the first to show the widespread effect of TEMPO on yeast. In conclusion, we have shown that, contrary to the commonly accepted notion, TEMPO has also a toxic effect, especially on active mitotic cells. We hypothesize that translation impairment or ribosome biogenesis disorder is likely to be considered secondary effects of TEMPO toxicity related to cell cycle arrest. Therefore, despite the growing interest in the use of this compound in the chemical industry, its toxic effect on the environment, especially biosphere, should be taken into account.
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Affiliation(s)
- Mateusz Mołoń
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland.
| | - Dominika Szlachcikowska
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland
| | - Karolina Stępień
- Institute of Medical Sciences, Medical College of Rzeszów University, Rzeszów University, Rzeszów, Poland
| | - Patrycja Kielar
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland
| | - Sabina Galiniak
- Institute of Medical Sciences, Medical College of Rzeszów University, Rzeszów University, Rzeszów, Poland.
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Anti-Aging Effects of a Serum Based on Coconut Oil Combined with Deer Antler Stem Cell Extract on a Mouse Model of Skin Aging. Cells 2022; 11:cells11040597. [PMID: 35203249 PMCID: PMC8870445 DOI: 10.3390/cells11040597] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/21/2021] [Accepted: 12/23/2021] [Indexed: 02/02/2023] Open
Abstract
Anti-aging is one of the top goals in the field of health care and aesthetics. Anti-aging cosmetics derived from nature are oriented to long-term development, bringing safety to users and being environmentally friendly. The aim of this study was to develop an anti-aging cosmetic formulation process based on coconut oil in combination with deer antler stem cell extract. The results show that the presence of deer antler stem cell extract added to the foundation made the serum product highly stable and helped improve skin aging significantly after 2 weeks of use. The skin site where the serum product was applied showed a smooth and elastic skin surface, with very few fine lines and shallow wrinkles. Serum reduced the number of wrinkles (48.09% compared to commercial serum (ME) and 60.31% compared to positive control (PC)), reduced skin recovery time (39.31% compared to ME and 67.1% of PC) after two weeks of use. After 2 weeks of use, collagen density increased 10.18% compared to ME and 63.76% compared to control. Epidermal thickness increased by 106.1% compared to PC and 121.7% compared to ME.
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Strater ZM, Rauch M, Jockusch S, Lambert TH. Oxidizable Ketones: Persistent Radical Cations from the Single‐Electron Oxidation of 2,3‐Diaminocyclopropenones. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zack M. Strater
- Department of Chemistry Columbia University New York NY 10027 USA
| | - Michael Rauch
- Department of Chemistry Columbia University New York NY 10027 USA
| | - Steffen Jockusch
- Department of Chemistry Columbia University New York NY 10027 USA
| | - Tristan H. Lambert
- Department of Chemistry Columbia University New York NY 10027 USA
- Department of Chemistry and Chemical Biology Cornell University Ithaca NY 14853 USA
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Strater ZM, Rauch M, Jockusch S, Lambert TH. Oxidizable Ketones: Persistent Radical Cations from the Single-Electron Oxidation of 2,3-Diaminocyclopropenones. Angew Chem Int Ed Engl 2019; 58:8049-8052. [PMID: 30964215 DOI: 10.1002/anie.201902265] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/29/2019] [Indexed: 11/07/2022]
Abstract
Single electron oxidation of 2,3-diaminocyclopropenones is shown to give rise to stable diaminocyclopropenium oxyl (DACO) radical cations. Cyclic voltammetry reveals reversible oxidations in the range of +0.70-1.10 V (vs. SCE). Computational, EPR, and X-ray analysis support the view that the oxidized species is best described as a cyclopropenium ion with spin density located on the heteroatom substituents, including 23.5 % on oxygen. The metal-ligand behavior of the DACO radical is also described.
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Affiliation(s)
- Zack M Strater
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Michael Rauch
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Steffen Jockusch
- Department of Chemistry, Columbia University, New York, NY, 10027, USA
| | - Tristan H Lambert
- Department of Chemistry, Columbia University, New York, NY, 10027, USA.,Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA
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A Bifunctional Anti-Amyloid Blocks Oxidative Stress and the Accumulation of Intraneuronal Amyloid-Beta. Molecules 2018; 23:molecules23082010. [PMID: 30103547 PMCID: PMC6222334 DOI: 10.3390/molecules23082010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/04/2018] [Accepted: 08/08/2018] [Indexed: 12/30/2022] Open
Abstract
There is growing recognition regarding the role of intracellular amyloid beta (Aβ) in the Alzheimer’s disease process, which has been linked with aberrant signaling and the disruption of protein degradation mechanisms. Most notably, intraneuronal Aβ likely underlies the oxidative stress and mitochondrial dysfunction that have been identified as key elements of disease progression. In this study, we employed fluorescence imaging to explore the ability of a bifunctional small molecule to reduce aggregates of intracellular Aβ and attenuate oxidative stress. Structurally, this small molecule is comprised of a nitroxide spin label linked to an amyloidophilic fluorene and is known as spin-labeled fluorene (SLF). The effect of the SLF on intracellular Aβ accumulation and oxidative stress was measured in MC65 cells, a human neuronal cell line with inducible expression of the amyloid precursor protein and in the N2a neuronal cell line treated with exogenous Aβ. Super-resolution microscopy imaging showed SLF decreases the accumulation of intracellular Aβ. Confocal microscopy imaging of MC65 cells treated with a reactive oxygen species (ROS)-sensitive dye demonstrated SLF significantly reduces the intracellular Aβ-induced ROS signal. In order to determine the contributions of the separate SLF moieties to these protective activities, experiments were also carried out on cells with nitroxides lacking the Aβ targeting domain or fluorene derivatives lacking the nitroxide functionality. The findings support a synergistic effect of SLF in counteracting both the conformational toxicity of both endogenous and exogenous Aβ, its promotion of ROS, and Aβ metabolism. Furthermore, these studies demonstrate an intimate link between ROS production and Aβ oligomer formation.
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Effect of the spacer length and nitroxide sterical shielding upon photostability of spin-labeled kynurenines. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Nitroxide delivery system for Nrf2 activation and skin protection. Eur J Pharm Biopharm 2015; 94:123-34. [DOI: 10.1016/j.ejpb.2015.05.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 05/06/2015] [Accepted: 05/08/2015] [Indexed: 11/19/2022]
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10
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Greenwald MBY, Anzi S, Ben Sasson S, Bianco-Peled H, Kohen R. Can nitroxides evoke the Keap1-Nrf2-ARE pathway in skin? Free Radic Biol Med 2014; 77:258-69. [PMID: 25236737 DOI: 10.1016/j.freeradbiomed.2014.08.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 07/29/2014] [Accepted: 08/20/2014] [Indexed: 01/14/2023]
Abstract
Nitroxides are stable cyclic radicals of diverse size, charge, and lipophilicity. They are cell-permeative, which effectively protects cells, tissues, isolated organs, and laboratory animals from radical-induced damage. The mechanisms of activity through which nitroxides operate are diverse, including superoxide dismutase-mimetic activity, oxidation of semiquinone radicals, oxidation of reduced metal ions, procatalase-mimetic activity, interruption of radical chain reactions, and indirect modulation of NO levels. Nitroxides possess both a nucleophilic (reducing properties) and an electrophilic (oxidizing properties) nature and, therefore, they may affect different cellular pathways. In the current study, a novel mechanism of action by which nitroxides provide skin protection based on their electrophilic nature is suggested. This study shows that nitroxides may act as electrophiles, directly or indirectly, capable of activating the Keap1-Nrf2-ARE pathway in human keratinocytes (HaCaT) and in human skin (human organ culture model). The high potency of oxoammonium cations versus hydroxylamines in activating the system is demonstrated. The mechanism of action by which nitroxides activate the Keap1-Nrf2-ARE pathway is discussed. Understanding the mechanism of activity may expand the usage of nitroxides as a skin protection strategy against oxidative stress-related conditions.
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Affiliation(s)
- Maya Ben Yehuda Greenwald
- The Institute for Drug Research, School of Pharmacy, The Hebrew University of Jerusalem, Jerusalem 91120, Israel; Department of Chemical Engineering and Technion-Israel Institute of Technology, Haifa 32000, Israel; The Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel; Department of Developmental Biology and Cancer Research, The Hebrew University Medical School, Ein-Karem Campus, Jerusalem 91120, Israel
| | - Shira Anzi
- Department of Developmental Biology and Cancer Research, The Hebrew University Medical School, Ein-Karem Campus, Jerusalem 91120, Israel
| | - Shmuel Ben Sasson
- Department of Developmental Biology and Cancer Research, The Hebrew University Medical School, Ein-Karem Campus, Jerusalem 91120, Israel
| | - Havazelet Bianco-Peled
- Department of Chemical Engineering and Technion-Israel Institute of Technology, Haifa 32000, Israel; The Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Ron Kohen
- The Institute for Drug Research, School of Pharmacy, The Hebrew University of Jerusalem, Jerusalem 91120, Israel.
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Sadowska-Bartosz I, Galiniak S, Skolimowski J, Stefaniuk I, Bartosz G. Nitroxides prevent protein glycoxidationin vitro. Free Radic Res 2014; 49:113-21. [DOI: 10.3109/10715762.2014.982113] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Fan J, Zhuang Y, Li B. Effects of collagen and collagen hydrolysate from jellyfish umbrella on histological and immunity changes of mice photoaging. Nutrients 2013; 5:223-33. [PMID: 23344251 PMCID: PMC3571645 DOI: 10.3390/nu5010223] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 12/17/2012] [Accepted: 01/04/2013] [Indexed: 11/16/2022] Open
Abstract
Jellyfish collagen (JC) was extracted from jellyfish umbrella and hydrolyzed to prepare jellyfish collagen hydrolysate (JCH). The effects of JC and JCH on UV-induced skin damage of mice were evaluated by the skin moisture, microscopic analyses of skin and immunity indexes. The skin moisture analyses showed that moisture retention ability of UV-induced mice skin was increased by JC and JCH. Further histological analysis showed that JC and JCH could repair the endogenous collagen and elastin protein fibers, and could maintain the natural ratio of type I to type III collagen. The immunity indexes showed that JC and JCH play a role in enhancing immunity of photoaging mice in vivo. JCH showed much higher protective ability than JC. These results suggest that JCH as a potential novel antiphotoaging agent from natural resources.
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Affiliation(s)
- Jian Fan
- College of Chemistry and Engineering, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; E-Mail:
| | - Yongliang Zhuang
- College of Chemistry and Engineering, Kunming University of Science and Technology, Kunming, 650500, Yunnan, China; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-871-5920302; Fax: +86-871-3801114
| | - Bafang Li
- Department of Food Chemistry and Nutrition, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, Shandong, China; E-Mail:
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Hou H, Li B, Zhang Z, Xue C, Yu G, Wang J, Bao Y, Bu L, Sun J, Peng Z, Su S. Moisture absorption and retention properties, and activity in alleviating skin photodamage of collagen polypeptide from marine fish skin. Food Chem 2012; 135:1432-9. [PMID: 22953877 DOI: 10.1016/j.foodchem.2012.06.009] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Revised: 06/02/2012] [Accepted: 06/08/2012] [Indexed: 11/18/2022]
Abstract
Collagen polypeptides were prepared from cod skin. Moisture absorption and retention properties of collagen polypeptides were determined at different relative humidities. In addition, the protective effects of collagen polypeptide against UV-induced damage to mouse skin were evaluated. Collagen polypeptides had good moisture absorption and retention properties and could alleviate the damage induced by UV radiation. The action mechanisms of collagen polypeptide mainly involved enhancing immunity, reducing the loss of moisture and lipid, promoting anti-oxidative properties, inhibiting the increase of glycosaminoglycans, repairing the endogenous collagen and elastin protein fibres, and maintaining the ratio of type III to type I collagen.
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Affiliation(s)
- Hu Hou
- College of Food Science and Engineering, Ocean University of China, No. 5 Yu Shan Road, Qingdao, Shandong Province 266003, PR China
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Venditti E, Brugè F, Astolfi P, Kochevar I, Damiani E. Nitroxides and a nitroxide-based UV filter have the potential to photoprotect UVA-irradiated human skin fibroblasts against oxidative damage. J Dermatol Sci 2011; 63:55-61. [PMID: 21530182 DOI: 10.1016/j.jdermsci.2011.03.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 03/04/2011] [Accepted: 03/24/2011] [Indexed: 12/26/2022]
Abstract
BACKGROUND Antioxidants are now being incorporated into sunscreens as additional topical measure for delaying the aging process and reducing photo-damage to skin induced by excessive UVA exposure. UVA radiation reaching the skin leads to the generation of ROS (reactive oxygen species) implicated in DNA damage and activation of matrix metalloproteinase-1 (MMP-1) responsible for collagen damage and photo-aging. Nitroxides are a class of compounds endowed with versatile antioxidant activity and recently, nitroxide-based UV filters in which a nitroxide moiety has been attached to the most popular UV filter present in sunscreens have been developed. OBJECTIVE This study explores the potential photo-protective effects of these compounds on ROS production and induction of MMP-1 in cultured human dermal fibroblasts exposed to UVA. For comparison, vitamin E was also tested. METHODS The effects were assessed by measuring intracellular ROS production using a ROS-index probe and MMP-1 mRNA expression levels using quantitative real-time PCR (qPCR). RESULTS Exposure of fibroblasts to 18J/cm(2) UVA lead to a two-fold increase in ROS production which was reduced to non-irradiated control levels in the presence of 50μM nitroxide compounds and vitamin E. Under the same conditions, a ten-fold increase in MMP-1 mRNA expression levels was observed 24h post-UVA treatment which was significantly reduced by all nitroxide compounds but not vitamin E. CONCLUSION The results of this study support the potential use of nitroxide compounds, including novel nitroxide-based UV filters, as a useful and alternative strategy for improving the efficacy of topical formulations against photo-aging and possibly photo-carcinogenesis.
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Affiliation(s)
- Elisabetta Venditti
- Dipartimento di Biochimica, Biologia e Genetica, Università Politecnica delle Marche, I-60131 Ancona, Italy
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Abstract
Nitroxyl contrast agents (nitroxyl radicals, also known as nitroxide) are paramagnetic species, which can react with reactive oxygen species (ROS) to lose paramagnetism to be diamagnetic species. The paramagnetic nitroxyl radical forms can be detected by using electron paramagnetic resonance imaging (EPRI), Overhauser MRI (OMRI), or MRI. The time course of in vivo image intensity induced by paramagnetic redox-sensitive contrast agent can give tissue redox information, which is the so-called redox imaging technique. The redox imaging technique employing a blood-brain barrier permeable nitroxyl contrast agent can be applied to analyze the pathophysiological functions in the brain. A brief theory of redox imaging techniques is described, and applications of redox imaging techniques to brain are introduced.
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Tsentalovich YP, Yanshole VV, Polienko YF, Morozov SV, Grigor’ev IA. Deactivation of Excited States of Kynurenine Covalently Linked to Nitroxides. Photochem Photobiol 2010; 87:22-31. [DOI: 10.1111/j.1751-1097.2010.00841.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Antioxidative properties of nitroxyl radicals and hydroxyamines in reactions with triplet and deaminated kynurenine. Russ Chem Bull 2010. [DOI: 10.1007/s11172-010-0046-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Amorati R, Pedulli GF, Pratt DA, Valgimigli L. TEMPO reacts with oxygen-centered radicals under acidic conditions. Chem Commun (Camb) 2010; 46:5139-41. [DOI: 10.1039/c0cc00547a] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Afaq F, Zaid MA, Khan N, Dreher M, Mukhtar H. Protective effect of pomegranate-derived products on UVB-mediated damage in human reconstituted skin. Exp Dermatol 2009; 18:553-61. [PMID: 19320737 PMCID: PMC3004287 DOI: 10.1111/j.1600-0625.2008.00829.x] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Solar ultraviolet (UV) radiation, particularly its UVB (290-320 nm) component, is the primary cause of many adverse biological effects including photoageing and skin cancer. UVB radiation causes DNA damage, protein oxidation and induces matrix metalloproteinases (MMPs). Photochemoprevention via the use of botanical antioxidants in affording protection to human skin against UVB damage is receiving increasing attention. Pomegranate, from the tree Punica granatum, contains anthocyanins and hydrolysable tannins and possesses strong antioxidant and anti-tumor-promoting properties. In this study, we determined the effect of pomegranate-derived products--POMx juice, POMx extract and pomegranate oil (POMo)--against UVB-mediated damage using reconstituted human skin (EpiDerm(TM) FT-200). EpiDerm was treated with POMx juice (1-2 microl/0.1 ml/well), POMx extract (5-10 microg/0.1 ml/well) and POMo (1-2 microl/0.1 ml/well) for 1 h prior to UVB (60 mJ/cm(2)) irradiation and was harvested 12 h post-UVB to assess protein oxidation, markers of DNA damage and photoageing by Western blot analysis and immunohistochemistry. Pretreatment of Epiderm with pomegranate-derived products resulted in inhibition of UVB-induced (i) cyclobutane pyrimidine dimers (CPD), (ii) 8-dihydro-2'-deoxyguanosine (8-OHdG), (iii) protein oxidation and (iv) proliferating cell nuclear antigen (PCNA) protein expression. We also found that pretreatment of Epiderm with pomegranate-derived products resulted in inhibition of UVB-induced (i) collagenase (MMP-1), (ii) gelatinase (MMP-2, MMP-9), (iii) stromelysin (MMP-3), (iv) marilysin (MMP-7), (v) elastase (MMP-12) and (vi) tropoelastin. Gelatin zymography revealed that pomegranate-derived products inhibited UVB-induced MMP-2 and MMP-9 activities. Pomegranate-derived products also caused a decrease in UVB-induced protein expression of c-Fos and phosphorylation of c-Jun. Collectively, these results suggest that all three pomegranate-derived products may be useful against UVB-induced damage to human skin.
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Affiliation(s)
- Farrukh Afaq
- Department of Dermatology, University of Wisconsin, Madison
| | | | - Naghma Khan
- Department of Dermatology, University of Wisconsin, Madison
| | | | - Hasan Mukhtar
- Department of Dermatology, University of Wisconsin, Madison
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