Journal
SCIENCE SIGNALING
Volume 12, Issue 576, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/scisignal.aav2060
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Funding
- Japanese Ministry of Education, Culture, Sports, Science and Technology [15H05786, 17K15719]
- Joint Usage/Research Program of Medical Research Institute, Tokyo Medical and Dental University
- Nipponham Foundation for the Future of Food
- TMDU President's Young Researchers Award
- Grants-in-Aid for Scientific Research [17K15719, 15H05786] Funding Source: KAKEN
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Basophils have nonredundant roles in various immune responses that require Ca2+ influx. Here, we examined the role of two Ca2+ sensors, stromal interaction molecule 1 and 2 (STIM1 and STIM2), in basophil activation. We found that loss of STIM1, but not STIM2, impaired basophil IL-4 production after stimulation with immunoglobulin E(IgE)-containing immune complexes. In contrast, when basophils were stimulated with IL-3, loss of STIM2, but not STIM1, reduced basophil IL-4 production. This difference in STIM proteins was associated with distinct time courses of Ca2+ influx and transcription of the Il4 gene that were elicited by each stimulus. Similarly, basophil-specific STIM1 expression was required for IgE-driven chronic allergic inflammation in vivo, whereas STIM2 was required for IL-4 production after combined IL-3 and IL-33 treatment in mice. These data indicate that STIM1 and STIM2 have differential roles in the production of IL-4, which are stimulus dependent. Furthermore, these results illustrate the vital role of STIM2 in basophils, which is often considered to be less important than STIM1.
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