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. 2016 Jul;80(7):1416-24.
doi: 10.1080/09168451.2016.1156480. Epub 2016 Apr 4.

Oral Administration of Aloe Vera Gel Powder Prevents UVB-induced Decrease in Skin Elasticity via Suppression of Overexpression of MMPs in Hairless Mice

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Oral Administration of Aloe Vera Gel Powder Prevents UVB-induced Decrease in Skin Elasticity via Suppression of Overexpression of MMPs in Hairless Mice

Marie Saito et al. Biosci Biotechnol Biochem. .

Abstract

This study reports the effects of oral Aloe vera gel powder (AVGP) containing Aloe sterols on skin elasticity and the extracellular matrix in ultraviolet B (UVB)-irradiated hairless mice. Ten-week-old hairless mice were fed diets containing 0.3% AVGP for 8 weeks and irradiated UVB for 6 weeks. Mice treated with AVGP showed significant prevention of the UVB-induced decrease in skin elasticity. To investigate the mechanism underlying this suppression of skin elasticity loss, we measured the expression of matrix metalloproteinase (MMP)-2, -9, and -13. AVGP prevented both the UVB-induced increases in MMPs expressions. Moreover, we investigated hyaluronic acid (HA) content of mice dorsal skin and gene expression of HA synthase-2 (Has2). In the results, AVGP oral administration prevented UVB-induced decreasing in skin HA content and Has2 expression and attenuates the UVB-induced decrease in serum adiponectin, which promotes Has2 expression. These results suggested that AVGP has the ability to prevent the skin photoaging.

Keywords: Aloe vera; MMP; UVB; extracellular matrix; skin elasticity.

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