Elevating calcium in Th2 cells activates multiple pathways to induce IL-4 transcription and mRNA stabilization.
Elevating calcium in Th2 cells activates multiple pathways to induce IL-4 transcription and mRNA stabilization.
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DOI:
10.4049/jimmunol.181.6.3984
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发表时间:
2008-09-15
期刊:
影响因子:
--
通讯作者:
Paul WE
中科院分区:
文献类型:
--
作者:
Guo L;Urban JF;Zhu J;Paul WE
PMA and ionomycin cause T cell cytokine production. We report that ionomycin alone induces IL-4 and IFNγ, but not IL-2, from in vivo and in vitro generated murine Th2 and Th1 cells. Ionomycin-induced cytokine production requires nuclear factor of activated T cells (NFAT), p38; and calmodulin-dependent kinase IV (CaMKIV). Ionomycin induces p38 phosphorylation through a calcium-dependent, cyclosporine A-inhibitable pathway. “Knocking-down” apoptosis signal-regulating kinase 1 (ASK1) inhibits ionomycin-induced p38 phosphorylation and IL-4 production. Ionomycin also activates CaMKIV, which, together with p38, induces AP-1. Cooperation between AP-1 and NFAT leads to Il4 gene transcription. p38 also regulates IL-4 production by mRNA stabilization. T cell receptor stimulation also phosphorylates p38, partially through the calcium-dependent pathway; activated p38 is required for optimal IL-4 and IFNγ.
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