期刊
NATURE IMMUNOLOGY
卷 10, 期 2, 页码 214-222出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ni.1686
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资金
- Ministry of Education, Culture, Sports, Science, and Technology of Japan
- Japan Society for the Promotion of Science [17047016, 18060016, 19591162]
- Grants-in-Aid for Scientific Research [19591162, 18060016, 21390149, 17047016] Funding Source: KAKEN
The Fc receptor common gamma-chain (FcR gamma) 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 FcR gamma 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, FcR gamma 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 FcR gamma in IL-3 signal transduction. Our results identify a previously unknown mechanism whereby FcR gamma functions to 'route' selective cytokine-triggered signals into the ITAM-mediated IL-4 production pathway.
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