Aug 15, 2014

E proteins orchestrate dynamic transcriptional cascades to suppress ILC2 differentiation

bioRxiv
Kristi E KimJane M Landolin

Abstract

The basic helix-loop-helix transcription factors collectively called E proteins powerfully suppress the differentiation of group2 innate lymphoid cells from bone marrow and thymic progenitors. Here we investigated the underlying molecular mechanisms using inducible gain and loss of function approaches in ILC2s and their precursors, respectively. Cross-examination of RNA sequencing and ATAC sequencing data obtained at different time points reveals a set of genes which are likely direct targets of E proteins. Consequently, a widespread down-regulation of chromatin accessibility occurs at a later time point, possibly due to the activation of transcriptional repressor genes such as Cbfa2t3 and Jdp2. The large number of genes repressed by gain of E protein function leads to the down-regulation of a transcriptional network important for ILC2 differentiation.

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