Regulation of macrophage and neutrophil cell fates by the PU.1:C/EBPα ratio and granulocyte colony-stimulating factor
Abstract
Hematopoietic transcription factors are essential for specifying cell fates; however, the function of cytokines in such developmental decisions is unresolved. We demonstrate here that haploinsufficiency for the gene encoding the transcription factor PU.1 partially suppresses the neutropenia of mice deficient in granulocyte colony-stimulating factor. This suppression was due to an increase in granulocytic progenitors and a diminution of monocytic progenitors. With (PU.1+/-) ES cells as well as (PU.1-/-) hematopoietic progenitors, we show that higher expression of PU.1 is needed for macrophage than for neutrophil development. In a (PU.1-/-) progenitor cell line, in which graded activity of PU.1 regulates neutrophil versus macrophage development, granulocyte colony-stimulating factor signaling supported the neutrophil cell fate by increasing expression of the neutrophil transcription factor C/EBPalpha in relation to expression of PU.1. Collectively, these results indicate that cytokines can promote cell fate decisions by altering the relative concentrations of lineage-determining transcriptional regulators.
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Lower PU.1 protein abundance results in enhanced granulocytic lineage differentiation.
“which is consistent with lower PU.1 protein abundance resulting in enhanced granulocytic lineage differentiation (33).”
From PU.1-Dependent Enhancer Inhibition Separates <i>Tet2</i> -Deficient Hematopoiesis from Malignant Transformation (2022) · cites this paper as [33]
Altered ratios between TFs can be sufficient to establish specific gene expression programs.
“Indeed, altered ratios between TFs can be sufficient to establish specific gene expression programs.9,10”
From Design principles of cell-state-specific enhancers in hematopoiesis (2025) · cites this paper as [9]
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- Authors
- Dahl, R., Walsh, J. C., Lancki, D., Laslo, P., Iyer, S. R., Singh, H., & Simon, M. C.
- Affiliations
- Howard Hughes Medical Institute (US)
- Boston Children's Hospital (US)
- Corresponding author
- Singh, Harinder
- Simon, M Celeste
- Venue
- Nature Immunology
- Published
- 2003-09-07
- Volume
- 4
- Issue
- 10
- Pages
- 1029-1036
- ISSN
- 1529-2908 (ISSN-L)
- 1529-2916
- OpenAlex
- W1972589365
- Cited by
- 380
- References
- 11
- Citations by year
- 2026: 6 · 2025: 9 · 2024: 6 · 2023: 15 · 2022: 10 · 2021: 6 · 2020: 10 · 2019: 22 · 2018: 16 · 2017: 18 · 2016: 26 · 2015: 26 · 2014: 15 · 2013: 17 · 2012: 16
- FWCI
- 8.26
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature Immunology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (2r01hl052094-05a1)
- National Heart, Lung, and Blood Institute (5T32 HL07237, T32HL007237, 5R01HL052094)
- National Institute of General Medical Sciences (5-T32-GM-07151, T32GM007151)
- Topics
- Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Blood disorders and treatments
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
- Keywords
- PU.1, C/EBPα, granulocyte colony-stimulating factor, macrophage development, neutrophil development, cell fate determination, hematopoietic transcription factors, haploinsufficiency, neutropenia, cytokine signaling, hematopoiesis
- MeSH terms
- Proto-Oncogene Protein Spi-1, Animals, Cell Differentiation, Colony-Forming Units Assay, Hematopoiesis, Hematopoietic Stem Cells, Macrophages, Mice, Inbred C57BL, Neutrophils, Proto-Oncogene Proteins, Trans-Activators, Macrophage Colony-Stimulating Factor, Granulocyte Colony-Stimulating Factor, Mice, Knockout, Cell Lineage, Thyroid Hormone Receptors alpha, Mice
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