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T cell functional differentiation is mediated by lineage-specific transcription factors. T helper 17 (Th17) has been recently identified as a distinct Th lineage mediating tissue inflammation. Retinoic acid receptor-related orphan receptor γ (RORγ) was shown to regulate Th17 differentiation; RORγ deficiency, however, did not completely abolish Th17 cytokine expression. Here, we report Th17 cells highly...
The nuclear factor of activated T cell 1 (Nfatc1) locus is a common insertion site for murine tumorigenic retroviruses, suggesting a role of transcription factor NFATc1 in lymphomagenesis. Although NFATc1 is expressed in most human primary lymphocytes and mature human T- and B-cell neoplasms, we show by histochemical stainings that NFATc1 expression is suppressed in anaplastic large cell lymphomas...
Threshold levels of individual NFAT factors appear to be critical for apoptosis induction in effector T cells. In these cells, the short isoform A of NFATc1 is induced to high levels due to the autoregulation of the NFATc1 promoter P1 by NFATs. P1 is located within a CpG island in front of exon 1, represents a DNase I hypersensitive chromatin site, and harbors several sites for binding of inducible...
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