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The two polarized T helper (Th) subsets Th1 and Th2 are identified by their signature cytokines, interferon γ (IFN-γ) and interleukin 4 (IL-4) respectively. Understanding the transcriptional regulation of cytokine expression is therefore critical for elucidating the process of Th cell differentiation. Ubiquitous and tissue-specific transcription factors, as well as chromatin remodeling of genomic...
The critical function of NFAT proteins in maintaining lymphoid homeostasis was revealed in mice lacking both NFATp and NFAT4 (DKO). DKO mice exhibit increased lymphoproliferation, decreased activation-induced cell death, and impaired induction of FasL. The transcription factors Egr2 and Egr3 are potent activators of FasL expression. Here we find that Egr2 and Egr3 are NFAT target genes. Activation...
Nuclear factor of activated T cells (NFAT) is a critical regulator of early gene transcription in response to TCR-mediated signals. Here, we show that mice lacking both NFATp and NFAT4 develop a profound lympho-proliferative disorder likely due to a lowered threshold for TCR signaling coupled with increased resistance to apoptosis secondary to defective FasL expression. NFAT mutant mice also have...
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