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.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Hida S,Yamasaki S,Sakamoto Y,Takamoto M,Obata K,Takai T,Karasuyama H,Sugane K,Saito T,Taki Sdoi
10.1038/ni.1686subject
Has Abstractpub_date
2009-02-01 00:00:00pages
214-22issue
2eissn
1529-2908issn
1529-2916pii
ni.1686journal_volume
10pub_type
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