Natural products targeting FcεRI receptor for anti‐allergic therapeutics

Mast cells and basophils are important contributors for development of allergic reactions. The activation of these cells via cross-linking of IgE bound to FceRI by allergen causes the generation of allergic mediators and the reaction of immediate hypersensitivity. Obviously, FceRI is considered as a key trigger of acute allergic responses. Consequently, FceRI is regarded as a potential target for downregulation of allergic diseases. So far, numerous synthetic agents have been reported for inhibition of FceRI expression and FceRI-IgE interaction. Meanwhile, natural products have received much attention due to their efficacy and safety. Recently, numerous anti-allergic agents from natural products have been revealed as promising inhibitors of allergic reactions via inhibiting the expression of FceRI subunits as well as blocking FceRI activation. Thus, the present contribution is mainly focused to describe natural products targeting FceRI receptor and to emphasize their applicable potential as anti-allergic foods. PRACTICAL APPLICATIONS: Phlorotannins, epigallocatechin-3-gallate, peptides, chitooligosaccharides, and other natural products have been revealed as potential inhibitors of allergic responses. These bioactive agents target to FceRI receptor by inhibiting expression of FceRI and blocking interaction of FceRI-IgE. Hence, these compounds could be applied as functional ingredients of anti-allergic foods.