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

The DOI matches its Crossref record; 72 of the 73 references it cites were found in a registry or an index.

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

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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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Research works printed but not linked: 13

  1. Eisenbeis C. F., 1993, Mol. Cell. Biol., 13, 6452
  2. Emanuel P. D., 1991, Exp. Hematol., 19, 1017
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  7. Pahl H. L., 1991, Exp. Hematol., 19, 1038
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Metadata

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
  • Life Sciences › Immunology and Microbiology › Immunology › 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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