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Cell Rep. 2017 Mar 7;18(10):2401-2414. doi: 10.1016/j.celrep.2017.02.029.

A Bach2-Cebp Gene Regulatory Network for the Commitment of Multipotent Hematopoietic Progenitors.

Author information

1
Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; AMED-CREST, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan; Department of Experimental Immunology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan.
2
Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; Center for Regulatory Epigenome and Diseases, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
3
Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
4
Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
5
Center for Regulatory Epigenome and Diseases, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; Department of Cell Proliferation, United Center for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
6
Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; AMED-CREST, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan; Center for Regulatory Epigenome and Diseases, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
7
Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; AMED-CREST, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan.
8
Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan; AMED-CREST, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan; Center for Regulatory Epigenome and Diseases, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan. Electronic address: igarashi@med.tohoku.ac.jp.

Abstract

Hematopoietic stem cell and multipotent progenitor (MPP) commitment can be tuned in response to an infection so that their differentiation is biased toward myeloid cells. Here, we find that Bach2, which inhibits myeloid differentiation in common lymphoid progenitors, represses a cohort of myeloid genes and activates those linked to lymphoid function. Bach2 repressed both Cebpb and its target Csf1r, encoding C/EBPβ and macrophage colony-stimulating factor receptor (M-CSFr), respectively, whereas C/EBPβ repressed Bach2 and activated Csf1r. Bach2 and C/EBPβ further bound to overlapping regulatory regions at their myeloid target genes, suggesting the presence of a gene regulatory network (GRN) with mutual repression between these factors and a feedforward loop leading to myeloid gene regulation. Lipopolysaccharide reduced the expression of Bach2, resulting in enhanced myeloid differentiation. The Bach2-C/EBPβ GRN pathway thus tunes MPP commitment to myeloid and lymphoid lineages both under normal conditions and after infection.

KEYWORDS:

B cells; gene regulatory network; infection; inner myeloid; lineage commitment; multipotent progenitors; stem cells; super enhancers; transcription factors

PMID:
28273455
DOI:
10.1016/j.celrep.2017.02.029
[Indexed for MEDLINE]
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