Abstract:
:During hematopoiesis, cells originating from the same stem cell reservoir differentiate into distinct cell types. The mechanisms enabling common progenitors to differentiate into alternative cell fates are not fully understood. Here, we identify cell-fate-determining transcription factors (TFs) governing dendritic cell (DC) development by annotating the enhancer landscapes of the DC lineage. Combining these analyses with detailed overexpression, knockdown, and ChIP-Seq studies, we show that Irf8 functions as a plasmacytoid DC epigenetic and fate-determining TF, regulating massive, cell-specific chromatin changes in thousands of pDC enhancers. Importantly, Irf8 forms a negative feedback loop with Cebpb, a monocyte-derived DC epigenetic fate-determining TF. We show that using this circuit logic, a pulse of TF expression can stably define epigenetic and transcriptional states, regardless of the microenvironment. More broadly, our study proposes a general paradigm that allows closely related cells with a similar set of signal-dependent factors to generate differential and persistent enhancer landscapes.
journal_name
Mol Celljournal_title
Molecular cellauthors
Bornstein C,Winter D,Barnett-Itzhaki Z,David E,Kadri S,Garber M,Amit Idoi
10.1016/j.molcel.2014.10.014subject
Has Abstractpub_date
2014-12-18 00:00:00pages
749-62issue
6eissn
1097-2765issn
1097-4164pii
S1097-2765(14)00798-9journal_volume
56pub_type
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