Antioxidants - What is their significance in sun protection ? / Michael W. Brown in SOFW JOURNAL, Vol. 129, N° 7 (07/2003)

[article]  inSOFW JOURNAL > Vol. 129, N° 7 (07/2003) . - p. 2-12 Titre : Antioxidants - What is their significance in sun protection ? Type de document : texte imprimé Auteurs : Michael W. Brown, Auteur ; L. G. Hamilton, Auteur ; S. P. Long, Auteur Année de publication : 2003 Article en page(s) : p. 2-12 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : ADN -- Altération Antioxydants Etude in vitro Etude in vivo Facteur de protection solaire Lipides Peau -- Soins et hygiène Photo-oxydation Produits antisolaires Radicaux libres (chimie) Rayonnement ultraviolet -- Effets physiologiques Index. décimale : 668.5 Parfums et cosmétiques Résumé : It has long been known that ultraviolet (UV) light can interact directly with biological chromaphores such as deoxyribonucleaic acid (DNA) and in so doing, can damage those molecules. More recently the role of UV-light in the generation of free radicals in the skin has suggested a secondary indirect route for biological damage. Here, we describe a series of in vitro, ex vivo and in vivo experiments designed to investigate whether certain antioxidant materials are able to prevent free radical initiated damage to biological molecules during exposure to UV-light. A number of antioxidant materials are shown to be effective at preventing DNA damage (measured by alkaline comet assay) in a tissue culture model and at preventing lipid peroxidation in both an in vitro model and ex vivo human stratum corneum tape stripping model. The performance of these materials when used in combination can show a synergistic or optimised effect. However when antioxidant materials proven to be effective at preventing DNA damage and lipid peroxidation are incorporated into a sunscreen product, no effect is measurable on the sun protection factor (SPF) on the product. Note de contenu : - In vitro investigations - Ex vivo investigations - In vivo investigations Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28139 [article]

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Biophotonics - A new field in efficacy testing UV-protection of skin and hair monitored by ICL-S and ICL-M / S. Bernard in SOFW JOURNAL, Vol. 128, N° 6 (06/2002)

[article]  inSOFW JOURNAL > Vol. 128, N° 6 (06/2002) . - p. 40-45 Titre : Biophotonics - A new field in efficacy testing UV-protection of skin and hair monitored by ICL-S and ICL-M Type de document : texte imprimé Auteurs : S. Bernard, Auteur ; M. Rohr, Auteur ; Annika Schrader, Auteur Année de publication : 2002 Article en page(s) : p. 40-45 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cheveux -- Soins et hygiène Chimiluminescence Mesure Peau -- Soins et hygiène Photodétérioration Photonique Rayonnement ultraviolet -- Effets physiologiques Index. décimale : 668.5 Parfums et cosmétiques Résumé : Aim of this paper is to establish ICL-S (induced chemiluminescence of human skin) and ICL-H (induced chemiluminescence of human hair) as new approaches in the field of biophotonics for the determination of UV-induced skin and hair damage. Mainly UV-irradiation is capable of disturbing the balance (steady state equilibrium) between pro- and anti-oxi-dative reactions in the skin, resulting in and increased formation of free radicals and reactive oxygen species, which can thereby damage living cells. Part of the energy of these reactions is released in form of photons. This UV-induced, but chemically generated pho-ton emission (chemiluminescence) is correlated to extent of damage. UV-irradiation plays also a major role in photo-degradation of hair, decreasing its tensile strength and resulting in photo-bleaching. In randomised, in vivo studies on healthy volunteers, the short-term photo-protective effects of chemical UVA-filters are demonstrated by a significant decrease in ICL-S up to 70%. Independent of the amount of UVB-protection (SPF 7, 14) a decrease of about 65% is measured in comparison to the untreated area if 2% of butyl methoxy-dibenzoylmethane is added to the test formulation. In addition to the in-vivo measurements on volunteers ICL-H is performed on commercially available hair tresses. A significant increase of more than 50% of the spontaneous photon-emission of UV-irradiated (8 hours of simulated sun light) is measured in comparison to virgin hair (no UV/no treatment). Photo-protection of the tresses is realised by application of commercially available "leave on "and" rinse of" products, in the course of which the leave on product shows, the best performance. The rinse off product with a quartenized UV-absorber shows at least some UV-protection and for the rinse off product with a claimed UV-protection no significant change is measured. Furthermore the amount of damage after subsequent perm and bleach treatments is correlated with the photon emission of the tresses. Note de contenu : - MATERIALS AND METHODS : Photon detection - Test design-Skin - Test design-Hair - RESULTS : UVA-protection of human skin - UV-protection on hair - Photon emission after perming and bleaching Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28185 [article]

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CIDP développe de nouveaux tests en photobiologie / Stela Cristiana Daneasa in EXPRESSION COSMETIQUE, N° 56 (03-04/2019)  

[article]  inEXPRESSION COSMETIQUE > N° 56 (03-04/2019) . - p. 60-61 Titre : CIDP développe de nouveaux tests en photobiologie Type de document : texte imprimé Auteurs : Stela Cristiana Daneasa, Auteur ; Jessen Curpen, Auteur Année de publication : 2019 Article en page(s) : p. 60-61 Langues : Multilingue (mul) Catégories : Lumière artificielle -- Effets physiologiques Lumière bleue Mesure Peau -- Effets de la lumière Rayonnement ultraviolet -- Effets physiologiques Tests cutanés Vieillissement cutané Index. décimale : 668.5 Parfums et cosmétiques Résumé : Afin de répondre aux besoins actuels des clients, CIDP (Centre International de Développement Pharmaceutique), société de recherche sous-contrat (CRO) avec plus de 15 ans d'expérience dans le domaine des tests solaires (FPS, UVAs, etc,) a mis en place des protocoles innovants permettant d'étayer des revendications de protection contre la lumière bleue. Note de contenu : - Les UV, première cause de vieillissement de la peau - CIDP, une société mauricienne pionnière en test solaires - L'émergence de la lumière bleue - Des protocoles innovants pour étayer des revendications anti-lumière bleue En ligne : https://drive.google.com/file/d/1LURBqQwk8q02UXh2Da2b7ruIwcOg-r5U/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32175 [article]

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Delicate flower promotes anti-photoageing benefits / Yohan Rolland in PERSONAL CARE EUROPE, Vol. 9, N° 4 (09/2016)  

[article]  inPERSONAL CARE EUROPE > Vol. 9, N° 4 (09/2016) . - p. 69-73 Titre : Delicate flower promotes anti-photoageing benefits Type de document : texte imprimé Auteurs : Yohan Rolland, Auteur ; Alexis Lavaud, Auteur Année de publication : 2016 Article en page(s) : p. 69-73 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : ADN -- Réparation Anti-inflammatoires Antiâge Antioxydants Barrière cutanée Chromatographie en phase liquide Collagène -- Synthèse Cosmétiques Extraits de plantes:Extraits (pharmacie) Peau -- Soins et hygiène Protection cutanée Rayonnement ultraviolet -- Effets physiologiques Stress oxydatif Index. décimale : 668.5 Parfums et cosmétiques Résumé : A study published in 2011 conducted on 1,400 randomly selected residents from Queensland aged 20-54 years, reported that 83% of the participants had premature skin ageing, worsening after the age of 30. The conclusion of this study was that premature skin ageing is common. It is associated with sun exposure during leisure or work, and therefore is preventable. Ultraviolet radiation from the sun has deleterious long-term effects on human skin, leading to premature ageing (photoageing). One of the most obvious acute effects of UV on the skin is the generation reactive oxygen species (ROS) and the induction of inflammation. In the epidermis, UV exposure has dramatic effects on cell cohesion and mechanical integrity of the stratum corneum, compromising the critical barrier function of the skin. Dermal damage induced by ultraviolet radiation is principally manifested histologically as the disorganisation of collagen fibrils. Ultraviolet radiation can induce several types of epidermal injury, including sunburn cell formation. Note de contenu : - SELECTION OF BIOLOGICAL MARKERS : Antioxidant property - prevention oxidative stress (DJ-1/Nrf2) - Anti-inflammatory property (TNF-α) - Barrier function improvement (ZO-1/loricrin) - Extra cellular matrix (ECM) protection (COL synthesis, MMP-1 inhibition) - Nuclear damage reduction - EXTRACTED WITH A BREAKTHROUGH TECHNOLOGY - ANTI-PHOTOAGEING COSMETIC BENEFITS : Antioxidant property (DJ-1/Nrf2) - Anti-inflammatory property (TNF-α) - Improvement of barrier function (ZO-1/loricrin - ECM protection (COL synthesis, MMP-1 inhibition) En ligne : https://drive.google.com/file/d/1vaKK3Haj2D2rOqNValmEecd5xRtPsHnt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27250 [article]

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detection and identification of free radicals generated by UV and visible light in ex vivo human skin / Leonhard Zastrow in IFSCC MAGAZINE, Vol. 11, N° 3 (07-08/2008)

[article]  inIFSCC MAGAZINE > Vol. 11, N° 3 (07-08/2008) . - p. 207-215 Titre : detection and identification of free radicals generated by UV and visible light in ex vivo human skin Type de document : texte imprimé Auteurs : Leonhard Zastrow, Auteur ; Norbert Groth, Auteur ; Frank Klein, Auteur ; Dieter Kockott, Auteur ; Jürgen Lademann, Auteur ; Louis Ferrero, Auteur Année de publication : 2008 Article en page(s) : p. 207-215 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Peau Peau -- Effet du rayonnement ultraviolet Peau -- Effets du rayonnement solaire Radicaux libres (chimie) Rayonnement ultraviolet -- Effets physiologiques Résonance paramagnétique électronique Simulation, Méthode de Index. décimale : 668.5 Parfums et cosmétiques Résumé : Contrary to the skin biological end points used for determination of the sun protection factor and UVA protection factor, generation of excess free radicals in skin mainly reactive oxygen species is potentially the source of much skin damage and soo represents a more general biophysical answer to the effects of sun exposure of different wavelengths. By applying electron spin resonance spectroscopy to human skin biopsies, we determined in previous work a free radical action spectrum covering the ultraviolet and visible light range. Convolution of the action spectrum with sunlight spectral irradiance (280nm-700nm) showed the importance of visible light in free radical generation. This unexpected finding led us to perform further investigations. Firstly, an existing sun simulator was modified so that its outputtruly mimics the sun's full spectrum, including visible light. Human skin biopsies were irradiated either by this device or a conventional UV source, confirming our previous calculations : half of the free radicals are generated in the 400-700nm visible wavelength range. Secondly, the visible spectrum of the modified sun simulator was divided into narrow-band lights using different pairs of short and long pass-filters. Human skin biopsies impregnated with specific spin traps were exposed to the different narrow-band lights in order to identify different types of free radicals. Generation of dangerous radical species like O2, OH and CH-R was observed in different parts of the visible range, confirming the relevance of the free racial action spectrum and its ability to predict skin protection. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3807 [article]

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Effects of seasonality and a daily photo-protection upon some facial signs of Chinese women / Frédéric Flament in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 3 (06/2017)

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Etudes in vivo par résonance paramagnétique électronique, après exposition au rayonnement UV, des mécanismes radicalaires impliqués à la photocarcinogénèse cutanée / A. Valavanidis in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 17, N° 4 (08/1995)  

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A human skin model to evaluate the protective effect of compounds against UVA damage / Sophie Abadie in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 41, N° 6 (12/2019)  

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Un peptide biomimétique pour protéger l'ADN de la peau / Daniel Schmid in EXPRESSION COSMETIQUE, N° Hors série (12/2015)  

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Les photodommages d'ADN / Dimitra Markovitsi in L'ACTUALITE CHIMIQUE, N° 308-309 (05-06/2007)  

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Photoprotection : enjeux multiples / Caroline Chavigny in PARFUMS COSMETIQUES ACTUALITES, N° 166 (09/2002)

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Preventing skin cancer : new technologies needed ? / Norman E. Miller in GLOBAL PERSONAL CARE, Vol. 25, N° 4 (04/2024)  

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Redox proteomic evaluation of oxidative modification and recovery in a 3D reconstituted human skin tissue model exposed to UVB / J. M. Dyer in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 2 (04/2017)

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Safety first with UV light / Paul Jackson in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4550 (07/2010)

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Soleil, mon meilleur ennemi in BIOFUTUR, N° 323 (07-08/2011)

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Strong antioxidant defence from green tea extract / Vanessa E. Rivera in PERSONAL CARE EUROPE, Vol. 14, N° 2 (04/2020)  

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Sunscreens – another endangered species ? / Paul J. Matts in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° S1 (10/2023)  

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The adverse consequences of not using sunscreens / Antony R. Young in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° S1 (10/2023)  

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Unlocking UV benefits and claims beyond SPF / Amy Huang in GLOBAL PERSONAL CARE, Vol. 24, N° 9 (10/2023)  

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Update on ultraviolet A and B radiation generated by the sun and artificial lamps and their effects on skin / R. C. Romanhole in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 37, N° 4 (08/2015)  

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