Classification of sensitive skin and development of a treatment system appropriate for each group / Tomohiro Yokota in IFSCC MAGAZINE, Vol. 6, N° 4 (10-11-12/2003)

[article]  inIFSCC MAGAZINE > Vol. 6, N° 4 (10-11-12/2003) . - p. 303-307 Titre : Classification of sensitive skin and development of a treatment system appropriate for each group Type de document : texte imprimé Auteurs : Tomohiro Yokota, Auteur ; Masayuki Matsumoto, Auteur ; Takeshi Sakamaki, Auteur ; Rie Hikima, Auteur ; Shoji Hayashi, Auteur ; Mayumi Yanagisawa, Auteur ; Hirofumi Kuwahara, Auteur ; Shyunsuke Yamazaki, Auteur ; Tomoyasu Ogawa, Auteur ; Motoi Hayase, Auteur Année de publication : 2003 Article en page(s) : p. 303-307 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Fonction  barrière'  Classification  'Etat  d'hydratation'  Hypersensibilité  'Peau  sensible'  'Sensibilité  aux  stimuli  électriques'  'Points  cuisants'  'Densité  des  papilles  cutanées'  'Modèle  de  desquamation'  'Facteur  croissance  du  nerf'  'Perte  d'eau  transepidermique'  'Épaisseur  l'épiderme' Index. décimale : 668.5 Parfums et cosmétiques Résumé : In order to find an effective approach to improve sensitive skin, it is important to know the detailed mechanism of sensitive skin. In this study, detailed characteristics of sensitive skin were investigated using non-invasive methods. Senssitive skin was classified into three different types based on their particular characteristics. Type I was defined as the low barrier function group. Type II was defined as the inflammation group with normal barrier function and inflammatory changes. Type III was specified as the pseudo healthy group in terms of normal barrier function and no inflammatory change. In all types, a high content of nerve growth factor was observed in the stratum corneum. Both in Type II and III, the sensitivity to electric stimuli was high. Moreover, a treatment system appropriate for type I was examined. Topical application of cosmetics containing niacinamide significantly improved Type I sensitive skin, while there was no effect observed in either Type II or III showing normal barrier function. These data suggest that sensitive skin could be classified into three groups each with particular characteristics and an appropriate approach should be taken to improve sensitive skin with consideration given to the underlying mechanism of skin sensitivity. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10553 [article]

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Development of lip treatment on the basis of desquamation mechanism / Rie Hikima in IFSCC MAGAZINE, Vol. 7, N° 1 (01-02-03/2004)

[article]  inIFSCC MAGAZINE > Vol. 7, N° 1 (01-02-03/2004) . - p. 3-10 Titre : Development of lip treatment on the basis of desquamation mechanism Type de document : texte imprimé Auteurs : Rie Hikima, Auteur ; Shigeru Igarashi, Auteur ; Naoko Ikeda, Auteur ; Masayuki Matsumoto, Auteur ; Atsushi Hanyama, Auteur ; Yuichiro Egawa, Auteur ; Toshio Horikoshi, Auteur ; Shoji Hayashi, Auteur Année de publication : 2004 Article en page(s) : p. 3-10 Note générale : Bibliogr. Langues : Anglais (eng) Tags : Cornéocyte  Desquamation  'Protéase  cathepsine  D'  Lèvres  'Lèvres  gercées'  'Soin  des  lèvres' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Lip chapping is a serious cosmetics problem, though remedies other than moisturization have not been proposed. We investigated changes in the surface configurations of lip corneocytes and activities of desquamation-regulating proteinases associated with lip chapping. Using scanning electron microscopy, villus-like projections were observed on the inner surfaces of most corneocytes from normal lips, whereas those with flatter surface were predominantly found in chapped lips. Furthermore, cell surface area increased with the severity of lip chapping. Cathepsin D-like and chymo-trypsin-like proteinase, which are also present in skin as desquamation-regulating proteinases, were detected in lip corneocytes, though only cathepsin D activity was found to decrease in severely chapped lips. Hydration was also lower in areas of lip chapping. Sequential topical application of apricot extract essence increased cathepsin D activity and improved chapping severity. Our results suggest that lip chapping can be characterized as similar to senile xerosis rather than dry skin such as winter xerosis, as it shows a delayed transition of corneocytes through the stratum corneum, and the reduced cathepsin D activity may be one of the mechanisms that is further decreased by low hydration. We propose that an enhancement of both cathepsin D activity and lip moisture may be effective to improve lip chapping. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10486 [article]

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Study of Causal Factors of Dark Circles Around the Eyes / Masayuki Matsumoto in IFSCC MAGAZINE, Vol. 4, N° 4 (10-11-12/2001)

[article]  inIFSCC MAGAZINE > Vol. 4, N° 4 (10-11-12/2001) . - p. 281-286 Titre : Study of Causal Factors of Dark Circles Around the Eyes Type de document : texte imprimé Auteurs : Masayuki Matsumoto, Auteur ; Noriko Kobayashi, Auteur ; Osamu Hoshina, Auteur ; Shoji Hayashi, Auteur ; Seiichi Arai, Auteur Année de publication : 2001 Article en page(s) : p. 281-286 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Dark  circles'  Eyelid  'Internal  canthus'  'Blood  flow'  'Laser  Doppler  flowmeter'  'Skin  color'  lightness  (L*)'  surface  temperature' Index. décimale : 668.5 Parfums et cosmétiques Résumé : The characteristics of the dark circles were investigated using a laser Doppler flowmeter (LDF) and a chromameter. Regarding the blood flow, we found that the areas surrounding the internal canthus where the dark circles are frequently observed had larger blood mass and slower blood flow velocity compared to the other regions. Furthermore, this tendency is particularly evident in the superficial layers of the skin, and also in the lower part and the lateral part of the internal canthus. Our results suggest that naturally the blood flow in the areas surrounding the internal canthus tends to stagnate easily. Concerning the skin color, we found that the areas around the internal canthus tend to appear, particularly the skin color under the internal canthus had a low lightness (L*) value. There was a significant correlation between the differences in the blood mass (ΔMass) and the differences in lightness (ΔL*) in the lower part of the internal canthus and its adjacent regions. Furtheremore, compared to the person with less prominent dark circles, the person with prominent circles had larger differences between the lower part of the internal canthus and its adjacent regions in terms of the blood mass as well as the lightness. From our results, we concluded that retention of blood in the surface of the skin is a significant factor in the development of dark circles around the eyes. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10697 [article]

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