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Updated: May 23, 2026

Proliferation and Differentiation of Murine Myeloid Precursor 32D/G-CSF-R Cells

Proliferation and Differentiation of Murine Myeloid Precursor 32D/G-CSF-R Cells

Published on: February 21, 2018

C/EBPα and DEK coordinately regulate myeloid differentiation.

Rositsa I Koleva¹, Scott B Ficarro, Hanna S Radomska

¹Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215-5450, USA.

|April 5, 2012

Summary

This summary is machine-generated.

The transcription factor C/EBPα and DEK protein work together to activate myeloid gene expression. Phosphorylation of C/EBPα disrupts this interaction, impacting cell differentiation and potentially contributing to leukemia.

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Published on: October 20, 2014

Area of Science:

Molecular Biology
Cell Biology
Hematopoiesis

Background:

CCAAT/enhancer-binding protein alpha (C/EBPα) is crucial for myeloid differentiation.
Acute myeloid leukemia (AML) often involves impaired C/EBPα function.
Oncogenic FLT3 signaling can disrupt C/EBPα activity through serine 21 (S21) phosphorylation.

Purpose of the Study:

To elucidate the mechanism by which S21 phosphorylation affects C/EBPα's transcriptional activity.
To identify proteins interacting with C/EBPα on chromatin.
To investigate the role of DEK in C/EBPα-mediated myeloid differentiation.

Main Methods:

Immuno-affinity purification coupled with quantitative mass spectrometry to identify C/EBPα-associated proteins.
Chromatin recruitment assays.
Genetic depletion of DEK in hematopoietic progenitor cells.
Analysis of granulocytic differentiation markers.

Main Results:

DEK was identified as a novel component of C/EBPα chromatin complexes.
S21 phosphorylation disrupts the C/EBPα-DEK interaction.
DEK is recruited to the GCSFR3 promoter by C/EBPα to enhance its activation.
Depletion of DEK impairs C/EBPα-driven granulocytic gene expression and G-CSF-induced differentiation.

Conclusions:

C/EBPα and DEK cooperate to activate myeloid gene expression.
S21 phosphorylation of C/EBPα modulates protein interactions, regulating hematopoietic progenitor differentiation.
This interaction offers potential therapeutic targets for AML.