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- Title
Fc receptor gamma-chain, a constitutive component of the IL-3 receptor, is required for IL-3-induced IL-4 production in basophils.
- Authors
Hida, Shigeaki; Yamasaki, Sho; Sakamoto, Yuzuru; Takamoto, Masaya; Obata, Kazushige; Takai, Toshiyuki; Karasuyama, Hajime; Sugane, Kazuo; Saito, Takashi; Taki, Shinsuke
- Abstract
The Fc receptor common gamma-chain (FcRgamma) is a widely expressed adaptor bearing an immunoreceptor tyrosine-based activation motif (ITAM) that transduces activation signals from various immunoreceptors. We show here that basophils lacking FcRgamma developed normally and proliferated efficiently in response to interleukin 3 (IL-3) but were very impaired in IL-3-induced production of IL-4 and in supporting T helper type 2 differentiation. Through its transmembrane portion, FcRgamma associated constitutively with the common beta-chain of the IL-3 receptor and signaled by recruiting the kinase Syk. Retrovirus-mediated complementation demonstrated the essential function of the ITAM of FcRgamma in IL-3 signal transduction. Our results identify a previously unknown mechanism whereby FcRgamma functions to 'route' selective cytokine-triggered signals into the ITAM-mediated IL-4 production pathway.
- Publication
Nature immunology, 2009, Vol 10, Issue 2, p214
- ISSN
1529-2916
- Publication type
Journal Article
- DOI
10.1038/ni.1686