Abstract
A biochip assay provides high-throughput and multiplexed analysis of biological samples, chemicals, and natural products. Pruritus is itchiness due to several causes, such as allergy, dry skin, pregnancy, liver disease, kidney disease, and thyroid disease. Treatment of pruritus is associated with reduced immunoglobulin (IgE) and FcεRI levels in sera. Treatment of pruritus include corticosteroid creams or ointment. However, they have side effects, so we need a safer treatment using natural products. Here, we developed an assay using protein chip technology to identify natural products with antipruritic activity that inhibit IgE-FcεRI binding. Of the 28 tested natural product extracts, Corni Fructus extract inhibited human IgE-FcεRI binding and also showed anti-histamine effects in MC/9 mast cells. These results suggest that this protein biochip assay system can be used to identify promising natural product extracts for the treatment of pruritus.
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