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  • Title: On the course of the irritant reaction after irritation with sodium lauryl sulphate.
    Author: Gloor M, Senger B, Langenauer M, Fluhr JW.
    Journal: Skin Res Technol; 2004 Aug; 10(3):144-8. PubMed ID: 15225263.
    Abstract:
    BACKGROUND: The sodium lauryl sulphate (SLS) irritation test is a well-established model for irritant contact dermatitis after the effects of surfactants. AIM OF THE STUDY: The course of changes in corneometric measurements (stratum corneum hydration), in transepidermal water loss (TEWL), in laser Doppler measurements (epidermal perfusion) and in colorimetric measurements (skin redness), after a single SLS irritation, should be studied over time. METHODS: Twenty healthy volunteers were studied. Irritation with 1% SLS solution was applied to the side of one forearm for 24 h under occlusive conditions, while the symmetrical experimental site remained untreated. Measurements were made for 9 days after completion of SLS irritation. RESULTS: Stratum corneum hydration was reduced immediately after irritation, and subsequently a hyper-hydration was observed. The increase in TEWL, laser Doppler measurements and skin redness persisted for 7-9 days. With regard to skin redness, a mild blanching effect was noticeable after 9 days. DISCUSSION: The evidence of very short-term exsiccation of the stratum corneum with persistent barrier damage, as well as reactive hyper-hydration and blanching of the skin, is remarkable. These first findings suggest that exsiccation of the stratum corneum is not caused by a damage to barrier lipids.
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