| Literature DB >> 20526344 |
Kaori Hitomi1, Satoko Tahara-Hanaoka, Satoru Someya, Akira Fujiki, Hideaki Tada, Tetsuya Sugiyama, Shiro Shibayama, Kazuko Shibuya, Akira Shibuya.
Abstract
Anaphylaxis is a life-threatening immediate hypersensitivity reaction triggered by antigen capture by immunoglobulin E (IgE) bound to the high-affinity IgE receptor (FcvarepsilonRI) on mast cells. However, the regulatory mechanism of mast cell activation is not completely understood. Here we identify an immunoglobulin-like receptor, Allergin-1, that contains an immunoreceptor tyrosine-based inhibitory motif (ITIM)-like domain, and show it was preferentially expressed on mast cells. Mouse Allergin-1 recruited the tyrosine phosphatases SHP-1 and SHP-2 and the inositol phosphatase SHIP. Coligation of Allergin-1 and FcvarepsilonRI suppressed IgE-mediated degranulation of bone marrow-derived cultured mast cells. Moreover, mice deficient in Allergin-1 developed enhanced passive systemic and cutaneous anaphylaxis. Thus, Allergin-1 suppresses IgE-mediated, mast cell-dependent anaphylaxis in mice.Entities:
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Year: 2010 PMID: 20526344 DOI: 10.1038/ni.1886
Source DB: PubMed Journal: Nat Immunol ISSN: 1529-2908 Impact factor: 25.606