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Therapeutic potential of topically administered γ-AlOOH on 2,4-dinitrochlorobenzene-induced atopic dermatitis-like lesions in Balb/c mice.

Experimental Dermatology 2018 December 20
Boehmite (γ-AlOOH) has a wide range of applications in a variety of industrial and biological fields. However, little is known about its potential roles in skin diseases. The current study investigated its effect on atopic dermatitis (AD). Following characterization, cytotoxicity, pro-inflammatory response, and oxidative stress associated with boehmite were assessed, using TNF-α-induced keratinocytes and mast cells. In addition, therapeutic effects of boehmite, topically administered to Balb/c mice induced by 2,4-dinitrochlorobenzene (DNCB), were evaluated. Expression of cytokines (TLSP, IL-25, and IL-33) and the generation of ROS from keratinocytes induced by TNF-α, were significantly inhibited by boehmite without affecting cell viability. MAPKs (ERK, JNK, and p38) required for cytokine expression were suppressed by boehmite treatment. Up-regulation of cytokines (TSLP, IL-4, IL-5, IL-13, RANTES) in human mast cells treated with phorbol 12-myristate 13-acetate and calcium ionophore (PMACI) was also suppressed by boehmite. Boehmite improved the AD-severity score, epidermal hyperplasia, and transepidermal water loss in DNCB-induced atopic dermatitis-like lesions. Moreover, Th2-mediated cytokine expression, mast cell hyperplasia, and destruction of the skin barrier were improved by boehmite treatment. Overall, we demonstrated that boehmite may potentially protect against atopic dermatitis. This article is protected by copyright. All rights reserved.

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