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          Institute: MPI für molekulare Zellbiologie und Genetik     Collection: MPI-CBG Publications 2013 (arch)     Display Documents



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ID: 688510.0, MPI für molekulare Zellbiologie und Genetik / MPI-CBG Publications 2013 (arch)
PU.1 level-directed chromatin structure remodeling at the Irf8 gene drives dendritic cell commitment.
Authors:Schönheit, Jörg; Kuhl, Christiane; Gebhardt, Marie Luise; Klett, Francisco Fernández; Riemke, Pia; Scheller, Marina; Huang, Gang; Naumann, Ronald; Leutz, Achim; Stocking, Carol; Priller, Josef; Andrade-Navarro, Miguel A; Rosenbauer, Frank
Date of Publication (YYYY-MM-DD):2013
Title of Journal:Cell Reports
Volume:3
Issue / Number:5
Start Page:1617
End Page:1628
Copyright:not available
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Dendritic cells (DCs) are essential regulators of immune responses; however, transcriptional mechanisms that establish DC lineage commitment are poorly defined. Here, we report that the PU.1 transcription factor induces specific remodeling of the higher-order chromatin structure at the interferon regulatory factor 8 (Irf8) gene to initiate DC fate choice. An Irf8 reporter mouse enabled us to pinpoint an initial progenitor stage at which DCs separate from other myeloid lineages in the bone marrow. In the absence of Irf8, this progenitor undergoes DC-to-neutrophil reprogramming, indicating that DC commitment requires an active, Irf8-dependent escape from alternative myeloid lineage potential. Mechanistically, myeloid Irf8 expression depends on high PU.1 levels, resulting in local chromosomal looping and activation of a lineage- and developmental-stage-specific cis-enhancer. These data delineate PU.1 as a concentration-dependent rheostat of myeloid lineage selection by controlling long-distance contacts between regulatory elements and suggest that specific higher-order chromatin remodeling at the Irf8 gene determines DC differentiation.
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Communicated by:Lib
Affiliations:MPI für molekulare Zellbiologie und Genetik
Identifiers:LOCALID:5642
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