Effect of detergents on the physicochemical properties of skin stratum corneum: a two‐photon excitation fluorescence microscopy study. (10th October 2013)

• Record Type: Journal Article
• Authors: Bloksgaard, M.; Brewer, J. R.; Pashkovski, E.; Ananthapadmanabhan, K. P.; Sørensen, J. A.; Bagatolli, L. A.
• Is Part Of: International journal of cosmetic science. Volume 36:Number 1(2014:Feb.)
• Page Start: 39
• Page End: 45
• Publication Date: 2013-10-10
• Subjects: Cosmetics -- Periodicals; 668.5505
• DOI: 10.1111/ics.12089
• Languages: English
• ISSNs: 0142-5463

Abstract

<abstract abstract-type="main" id="ics12089-abs-0001"> <title>Synopsis</title> <sec id="ics12089-sec-0001" sec-type="section"> <title>Objective</title> <p>Understanding the structural and dynamical features of skin is critical for advancing innovation in personal care and drug discovery. Synthetic detergent mixtures used in commercially available body wash products are thought to be less aggressive towards the skin barrier when compared to conventional detergents. The aim of this work is to comparatively characterize the effect of a mild synthetic cleanser mixture (SCM) and sodium dodecyl sulphate (SDS) on the hydration state of the intercellular lipid matrix and on proton activity of excised skin stratum corneum (SC).</p> </sec> <sec id="ics12089-sec-0002" sec-type="section"> <title>Method</title> <p>Experiments were performed using two‐photon excitation fluorescence microscopy. Fluorescent images of fluorescence reporters sensitive to proton activity and hydration of SC were obtained in excised skin and examined in the presence and absence of SCM and SDS detergents.</p> </sec> <sec id="ics12089-sec-0003" sec-type="section"> <title>Results</title> <p>Hydration of the intercellular lipid matrix to a depth of 10 μm into the SC was increased upon treatment with SCM, whereas SDS shows this effect only at the very surface of SC. The proton activity of SC remained unaffected by treatment with either detergent.</p> </sec> <sec id="ics12089-sec-0004" sec-type="section"> <title>Conclusion</title> <p>While our study indicates that the SC is very resistant to external stimuli, it also shows that, in contrast to the response to SDS, SCM to some extent modulates the in‐depth hydration properties of the intercellular lipid matrix within excised skin SC.</p> </sec> </abstract>