Characterizing the nanomechanical properties of microcomedones after treatment with sodium salicylate ex vivo using atomic force microscopy / Zeinab Al-Rekabi in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 5 (10/2021)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 43, N° 5 (10/2021) . - p. 610-618 Titre : Characterizing the nanomechanical properties of microcomedones after treatment with sodium salicylate ex vivo using atomic force microscopy Type de document : document électronique Auteurs : Zeinab Al-Rekabi, Auteur ; Anthony Vincent Rawlings, Auteur ; Robert A. Lucas, Auteur ; Nidhin Raj, Auteur ; Charles A. Clifford, Auteur Année de publication : 2021 Article en page(s) : p. 610-618 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acné L'acné (nom féminin) est une dermatose (maladie de la peau) inflammatoire des follicules pilosébacés (glandes sécrétant le sébum, à la racine des poils) avec formation de comédons. Cette maladie de la peau est représentée dans sa forme la plus fréquente par l'acné polymorphe juvénile qui touche les adolescents, mais qui ne résume pas toutes les acnés. Il existe aussi des acnés exogènes d'origine professionnelle, médicamenteuse, cosmétique... Caractérisation Cartographie Dermo-cosmétologie Elasticité Ingrédients cosmétiques Micromédons Microscopie à force atomique Peau -- Soins et hygiène Salicylate de sodium Statistique Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : The treatment of acne presents a major clinical and dermatological challenge. Investigating the nanomechanical properties of the microcomedone precursor lesions using atomic force microscopy (AFM) may prove beneficial in understanding their softening, dissolution and prevention. Although the exact biochemical mechanism of NaSal on microcomedones is not fully understood at present, it appears to exhibit a significant exfoliation effect on the skin via corneodesmosome dissolution. - Methods : Therefore, to support this exploration, sodium salicylate (NaSal), a common ingredient employed in skin care products, is applied ex vivo to microcomedones,collected by nose strip adhesive tape, and their nanomechanical properties are assessed using AFM. Although the exact biochemical mechanism of NaSal on microcomedones is not fully understood at present, it appears to exhibit a significant exfoliation effect on the skin via corneodesmosome dissolution. - Results : Herein, our findings demonstrate that when microcomedones are treated with 2% NaSal, samples appeared significantly more compliant (‘softer’) ((1.3 ± 0.62) MPa) when compared to their pre-treated measurements ((7.2 ± 3.6) MPa; p = 0.038). Furthermore, elastic modulus maps showed that after 2% NaSal treatment, areas in the microcomedone appeared softer and swollen in some, but not in all areas, further proving the valuable impact of 2% NaSal solution in altering the biomechanical properties and morphologies in microcomedones. - Conclusion : Our results are the first of their kind to provide qualitative and quantitative mechanobiological evidence that 2% NaSal decreases the elastic modulus of microcomedones. Therefore, this study provides evidence that NaSal can be beneficial as an active ingredient in topical treatments aimed at targeting microcomedones. Note de contenu : - MATERIAL AND METHODS : Sample preparation - Solutions - Atomic force microscopy - Extracting the elastic modulus - Sample treatment and measurement - Statistical analysis - RESULTS AND DISCUSSION : Nanomechanical properties of microcomedones before and after treatment with 2% NaSal - Elastic modulus maps for pre-and post-treated microcomedones DOI : https://doi.org/10.1111/ics.12729 En ligne : https://drive.google.com/file/d/1W1RWpvyN52AtSAyF7MGSMdaQVeHD_x_c/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36864 [article]

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