Abstract
To evaluate the antiallergic effect of the fruit of Schizandra chinensis Baill (Family Magnoliaceae), which inhibited the mouse passive cutaneous anaphylaxis (PCA) reaction in a preliminary experiment, its main constituent, schizandrin, was isolated and its antiallergic effect investigated. Schizandrin inhibited the PCA reaction induced by the IgE-antigen complex, the scratching behaviors induced by compound 48/80 and the serum IgE production induced by ovalbumin. Schizandrin also inhibited the in vitro degranulation of compound 48/80-induced rat peritoneal mast cells and IgE-induced RBL 2H3 cells. Schizandrin reduced the protein expressions of TNF-alpha and IL-4 in IgE-induced RBL 2H3 cells. These findings suggest that schizandrin can improve IgE-induced anaphylaxis and scratching behaviors.
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