Abstract:IgE-mediated food allergy is manifested by an overactive T-helper 2 immune response to dietary antigens in the gastrointestinal (GI) tract. Interleukin (IL)-9 promote intestinal mastocytosis which allow the development of oral antigen-induced anaphylaxis. However, little is known about the primary cellular sources of IL-9 or the mechanisms that promote intestinal mastocytosis. Here, we report the identification of multifunctional IL-9-producing innate helper cells (IHC9) that secrete prodigious amounts of TH2 … Show more
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