Cited by 286Genomics and Chromatin DynamicsCytokine Signaling Pathways and InteractionsHematopoietic Stem Cell Transplantation

PU.1 (Spi-1) and C/EBPα Regulate Expression of the Granulocyte-Macrophage Colony-Stimulating Factor Receptor α Gene

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Hohaus, Stefan, Petrovick, Martha S., Voso, Maria Teresa, Sun, Zijie, Zhang, Dong-Er, Tenen, Daniel G.·1995·Molecular and Cellular Biology

Abstract

Growth factor receptors play an important role in hematopoiesis. In order to further understand the mechanisms directing the expression of these key regulators of hematopoiesis, we initiated a study investigating the transcription factors activating the expression of the granulocyte-macrophage colony-stimulating factor (GM-CSF) receptor alpha gene. Here, we demonstrate that the human GM-CSF receptor alpha promoter directs reporter gene activity in a tissue-specific fashion in myelomonocytic cells, which correlates with its expression pattern as analyzed by reverse transcription PCR. The GM-CSF receptor alpha promoter contains an important functional site between positions -53 and -41 as identified by deletion analysis of reporter constructs. We show that the myeloid and B cell transcription factor PU.1 binds specifically to this site. Furthermore, we demonstrate that a CCAAT site located upstream of the PU.1 site between positions -70 and -54 is involved in positive-negative regulation of the GM-CSF receptor alpha promoter activity. C/EBP alpha is the major CCAAT/enhancer-binding protein (C/EBP) form binding to this site in nuclear extracts of U937 cells. Point mutations of either the PU.1 site or the C/EBP site that abolish the binding of the respective factors result in a significant decrease of GM-CSF receptor alpha promoter activity in myelomonocytic cells only. Furthermore, we demonstrate that in myeloid and B cell extracts, PU.1 forms a novel, specific, more slowly migrating complex (PU-SF) when binding the GM-CSF receptor alpha promoter PU.1 site. This is the first demonstration of a specific interaction with PU.1 on a myeloid PU.1 binding site. The novel complex is distinct from that described previously as binding to B cell enhancer sites and can be formed by addition of PU.1 to extracts from certain nonmyeloid cell types which do not express PU.1, including T cells and epithelial cells, but not from erythroid cells. Furthermore, we demonstrate that the PU-SF complex binds to PU.1 sites found on a number of myeloid promoters, and its formation requires an intact PU.1 site adjacent to a single-stranded region. Expression of PU.1 in nonmyeloid cells can activate the GM-CSF receptor alpha promoter. Deletion of the amino-terminal region of PU.1 results in a failure to form the PU-SF complex and in a concomitant loss of transactivation, suggesting that formation of the PU-SF complex is of functional importance for the activity of the GM-CSF receptor alpha promoter. Finally, we demonstrate that C/EBP alpha can also active the GM-CSF receptor alpha promoter in nonmyeloid cells. These results suggest that PU.1 and C/EBP alpha direct the cell-type-specific expression of GM-CSF receptor alpha, further establish the role of PU.1 as a key regulator of hematopoiesis, and point to C/EBP alpha as an additional important factor in this process.

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Crossref · 10.1128/mcb.15.10.5830

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  • PU.1 regulates vast number of myeloid gene promoters including GM-CSF receptor α, M-CSF receptor, CD163, and CD11b.

    “PU.1 imparts its key functions by regulating vast number of myeloid gene promoters that include GM-CSF receptor a, M-CSF receptor (M-CSFR), scavenger receptor CD163, and CD11b, etc (6,7).”

    From FBW7 Inhibits Myeloid Differentiation in Acute Myeloid Leukemia via GSK3-Dependent Ubiquitination of PU.1 (2021) · cites this paper as [6]

    The Discussion (page not supplied) says that most myeloid cell-specific promoters contain functional PU.1 sites, including the M-CSF receptor promoter, and identifies a functional PU.1 site in the GM-CSF receptor α promoter. The paper also names CD11b as a previously described myeloid PU.1 target. Our copy does not identify CD163 as a PU.1-regulated promoter, so the full list is not supported. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • In cotransfection experiments, RUNX1, PU.1, and CEBPA play essential roles in activation of the hematopoietic differentiation genes MCSFR and GMCSFR.

    “In cotransfection experiments, RUNX1, PU.1, and CEBPA play essential roles in activation of the hematopoietic differentiation genes MCSFR and GMCSFR.7,8,31”

    From RUNX1 regulates corepressor interactions of PU.1 (2011) · cites this paper as [31]

    The Results report that cotransfected PU.1 and C/EBPα each increased GM-CSF receptor α promoter activity, supporting that part of the sentence. This paper does not report cotransfection evidence for RUNX1 or activation of the M-CSF receptor gene; it mentions the latter as another PU.1-regulated promoter. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • In myeloid lineages, putative PU.1 target genes include G-SCF receptor, GM-CSF receptor and M-CSF receptor.

    “In myeloid lineages, the putative PU.1 target genes include G-SCF receptor [23], GM-CSF receptor [24] and M-CSF receptor [25].”
  • C/EBP-α expression is prominent in immature myeloid cells.

    “C/EBP-α expression is prominent in immature myeloid cells [24, 101].”
  • Each factor (PU.1 and C/EBP-α) has been shown to synergize on various promoters, including M-CSF receptor promoter and neutrophil elastase (NE) promoter.

    “Each factor has been shown to synergize on various promoters, including M-CSF receptor promoter and neutrophil elastase (NE) promoter [24, 63].”

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Cites

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Research works printed but not linked: 12

  1. Eisenbeis C. F., 1993, Mol. Cell. Biol., 13, 6452
  2. Emanuel P. D., 1991, Exp. Hematol., 19, 1017
  3. 10.1182/blood.V82.7.1960.1960 · DOI
  4. Moulton K. S., 1994, Mol. Cell. Biol., 14, 4408
  5. Nordeen S. K., 1988, BioTechniques, 6, 454
  6. Pahl H. L., 1991, Exp. Hematol., 19, 1038
  7. Perez C., 1994, Mol. Cell. Biol., 14, 5023
  8. Pongubala J. M., 1992, Mol. Cell. Biol., 12, 368
  9. Ray D., 1992, Mol. Cell. Biol., 12, 4297
  10. Schuetze S., 1992, Mol. Cell. Biol., 12, 2967
  11. Schuetze S., 1993, Mol. Cell. Biol., 13, 5670
  12. Zhang D. E., 1994, Mol. Cell. Biol., 14, 8085

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Authors
Hohaus, S., Petrovick, M. S., Voso, M. T., Sun, Z., Zhang, D.-E., & Tenen, D. G.
Affiliations
Harvard University (US)
Corresponding author
Tenen, Daniel G.
Venue
Molecular and Cellular Biology
Published
1995-10-01
Volume
15
Issue
10
Pages
5830-5845
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2161743101
Cited by
284
References
73
Citations by year
2026: 4 · 2025: 6 · 2024: 4 · 2023: 5 · 2022: 8 · 2021: 3 · 2020: 6 · 2019: 6 · 2018: 7 · 2017: 5 · 2016: 5 · 2015: 8 · 2014: 5 · 2013: 7 · 2012: 6
FWCI
5.58
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Cineca Institutional Research Information System (Tor Vergata University) (submittedVersion)
Funders
  • American Lung Association
  • National Cancer Institute (CA 41456, R01CA041456)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK048660, DK48660)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
Keywords
PU.1, SPI-1, C/EBPα, GM-CSF receptor alpha, transcription factor binding sites, myelomonocytic cells, B cells, promoter regulation, transcriptional activation, hematopoiesis, single-stranded DNA binding, U937 cells
MeSH terms
Amino Acid Sequence, B-Lymphocytes, Base Sequence, Cell Line, DNA, DNA-Binding Proteins, DNA, Single-Stranded, Hematopoiesis, Humans, Methylation, Molecular Sequence Data, Monocytes, Mutation, Nuclear Proteins, Promoter Regions, Genetic, T-Lymphocytes, Transcription Factors, Transcriptional Activation, Retroviridae Proteins, Oncogenic, Receptors, Granulocyte-Macrophage Colony-Stimulating Factor, Genes, Reporter, CCAAT-Enhancer-Binding Proteins

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