Attenuation of negative effects of senescence in human skin using an extract from Sphingomonas hydrophobicum: development of new skin care solution / S. Gervason in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 41, N° 4 (08/2019)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 41, N° 4 (08/2019) . - p. 391-397 Titre : Attenuation of negative effects of senescence in human skin using an extract from Sphingomonas hydrophobicum: development of new skin care solution Type de document : texte imprimé Auteurs : S. Gervason, Auteur ; M. Napoli, Auteur ; A. Dreux-Zhiga, Auteur ; C. Lazzarelli, Auteur ; S. Garcier, Auteur ; A. Briand, Auteur ; M. Albouy, Auteur ; A. Thepot, Auteur ; Jean-Yves Berthon, Auteur ; Edith Filaire, Auteur Année de publication : 2019 Article en page(s) : p. 391-397 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Estime de soi Psychobiologie La psychobiologie étudie le comportement humain dans une perspective biologique. Elle s'intéresse aux processus biologiques dans le corps et en particulier dans le cerveau, et leur rapport avec les comportements et pensées. La biopsychologie a pris une importance majeure durant le XXe siècle avec le développement important de la médecine scientifique, de la génétique, des neurosciences, et des méthodes d'imagerie cérébrale. Sphingomonas Sphingomonas est un genre de protéobactéries de la famille des Sphingomonadaceae. Vieillissement Vieillissement cutané Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Intrinsic skin ageing is mainly caused by cellular senescence. p16 and p21 are two important tumour suppressor proteins that play essential roles during cell proliferation and ageing through regulating the expression of several genes. Moreover, physical changes between the ages of 55 and 60 years affect one's physical and disrupt self-esteem. The cosmetics industry has focused on bioactive substances derived from natural products such as plants, mushrooms and marine algae to counteract the deleterious effect on skin senescence. Besides these products, compounds produced by bacteria may decelerate individual senescence. - Methods : In order to evaluate the potential benefits of bacteria extract over skin ageing, we investigated whether a Sphingomonas hydrophobicum (SH) extract is able to protect our skin against senescence mechanisms. We used an ageing full-thickness skin equivalent model, which was treated or not with the bacteria extract in a systemic way for 42 days. p21 and p16 and senescence-associated galactosidase activity were used to detect cellular senescence with immunohistology. Using a psychobiological approach, we evaluated in vivo the effect of SH extract on self-esteem, isotropy and suppleness. - Results : Sphingomonas extract significantly suppressed senescence associated with β-galactosidase activation. It also significantly inhibited the expression of cell cycle inhibitors (p. 21 and p. 16). At the same time, the bacteria extract has a significant positive impact on the issue by increasing the expression of versican and fibrillin-1. Significant improvements of self-esteem were reported after 56 days of SH extract application. These psychological benefits were accompanied by a significant improvement in skin suppleness and isotropy. - Conclusion : Sphingomonas extract delays intrinsic skin ageing process by inhibiting cellular senescence, and has also the capability to restructure the skin. These beneficial physiological effects induced by SH extract have a positive influence on self-esteem. Because skin ageing causes emotional distress, SH extract can serve as an anti-ageing cosmeceutical agent and help to build a better psychological health, and help individuals to assume ageing. Note de contenu : - MATERIALS AND METHODS : Bacterial strains and culture conditions - MTT cell viability assay - Reconstructed skin model - Immunohistological analysis - In vivo study - Isotropy - Biomechanical properties of the skin - Psychological parameter - Statistics - RESULTS : Sphingomonas decreases the expression of senescence-related proteins - Sphingomonomas decreases the expression of β-galactosidase in the dermis - Expression of fibrillin-1 and versican - In vivo results DOI : 10.1111/ics.12534 En ligne : https://drive.google.com/file/d/1LNFVIERfOir-tS_SKwP59SulkHM-9vlx/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33119 [article]

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Increase in subjective well-being and psychological health after application of C8-silk lipoamino acid functionalized pigments included in a foundation / Magalie Cabannes in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 41, N° 5 (10/2019)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 41, N° 5 (10/2019) . - p. 489-195 Titre : Increase in subjective well-being and psychological health after application of C8-silk lipoamino acid functionalized pigments included in a foundation Type de document : texte imprimé Auteurs : Magalie Cabannes, Auteur ; C. Risselada, Auteur ; I. Chaisemartin, Auteur ; J. Pasquet, Auteur ; E. Couval, Auteur ; Jean-Yves Berthon, Auteur ; Edith Filaire, Auteur Année de publication : 2019 Article en page(s) : p. 489-195 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cortisol Estime de soi Lipoaminoacides Les lipoaminoacides sont une partie de la famille des lipopeptides avec en présence un ou plusieurs acides aminés différents. Il existe 20 acides aminés naturels regroupés en fonction de la nature de leur chaîne latérale : non polaire neutre (alanine, phénylalanine, leucine, isoleucine, proline, méthionine, valine, tryptophane,…), polaire basique (arginine, lysine, ornithine, histidine, citrulline), et polaire acide (acide glutamique et acide aspartique). Les acides aminés peuvent être soit des acides aminés purs, soit des acides aminés provenant de l'hydrolyse totale des protéines tels le collagène, la caséine, l'élastine, la kératine. La partie lipidique des lipoaminoacides est composée d'une ou de plusieurs chaines grasses avec pour origine divers acides gras. Maquillage Pigments Statistique Stress Tests psychologiques Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : The aim of this study was to evaluate the effects of two foundations before (D0) and after 5 days of application (D6) on psychophysiological parameters in order to compare C8-silk lipoamino acid functionalized pigments (FA) versus pure pigments (FP). - Methods : Assessment of self-esteem, stress, mood and emotion using psychological tests and evaluation of salivary cortisol concentrations were realized on 40 healthy females using a crossover study design at D0 and D6. Four saliva samples were taken on the awakening (C1), 30 min after the awakening (during the foundation application (C2)), 1 h after the foundation application (C3) and at 1900 h (C4) at DO and D6. Area under the curve was calculated in order to obtain information about the total amount of a given substance excreted in a specific time period. - Results : Five days of daily application of the foundation containing the pigments treated with the C8-silk lipoamino acids induced a significant increase (P < 0.001) in self-esteem and pleasant emotion (P < 0.05), and a significant decrease in general stress (P < 0.05). This was not the case after the FP application. Cortisol concentrations presented a pronounced diurnal rhythm whatever the foundation used. At DO, no significant differences were observed between the groups. At D6, cortisol concentrations measured 30 min and 1 h after the FA application were significantly lower (P < 0.05: C6.2, P < 0.05 C6.3, respectively) than those reported after FP application. AUC, a global stress response indicator, was significantly lower in FA group as compared to FP group after 5 days of application. Subjects found a decrease in tiredness signs and thought that FA has a good coverage. - Conclusion : Our results show that incorporation of C8-silk lipoamino acid as agent of pigment functionalization brings new benefits to a foundation. Adopting a psychophysiological approach, which is not invasive to the subjects, we show the measurement of cortisol at the same time that psychological indicators provide a scientific approach to examine the beneficial effects of a cosmetic product. Note de contenu : - MATERIALS AND METHODS : Foundation composition - Psychological parameters - Statistical analysis - RESULTS AND DISCUSSION : Salivary parameters - Psychological parameters Indice de classement : 10.1111/ics.12566 En ligne : https://drive.google.com/file/d/112YUFrmVka2wYp5CBk1b-7NQ0uBcy-nF/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33225 [article]

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