Effect of tannic acid on skin barrier function

Area of Science:

• Dermatology
• Biochemistry
• Material Science

Background:

• External irritants can cause skin inflammation.
• The stratum corneum (SC) is the outermost layer of the skin, acting as a primary barrier.
• Tannic acid (TA) is a plant-derived polyphenol with known astringent properties.

Purpose of the Study:

• To investigate the protective effects of tannic acid (TA) against skin inflammation induced by external irritants.
• To elucidate the mechanism by which TA exerts its protective effects on the skin barrier.

Main Methods:

• Utilized a mouse model of 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced skin inflammation.
• Employed a reconstructed human epidermal model for in vitro evaluation.
• Visualized the effect of TA on stratum corneum (SC) permeability using Lucifer Yellow.

Main Results:

• Tannic acid (TA) treatment significantly reduced skin inflammation in the TPA-induced mouse model.
• TA demonstrated a barrier function on the surface of the stratum corneum (SC).
• Lucifer Yellow penetration was inhibited by TA, confirming its barrier effect.

Conclusions:

• Tannic acid (TA) effectively protects the skin from inflammation caused by external irritants.
• TA functions as a physical barrier on the stratum corneum (SC) surface.
• TA holds potential for use in skincare formulations to enhance skin barrier function.