Gain-of-Function Effects of N-Terminal CEBPA Mutations in Acute Myeloid Leukemia

Bioessays. 2020 Feb;42(2):e1900178. doi: 10.1002/bies.201900178. Epub 2019 Dec 23.


Mutations in the CEBPA gene are present in 10-15% of acute myeloid leukemia (AML) patients. The most frequent type of mutations leads to the expression of an N-terminally truncated variant of the transcription factor CCAAT/enhancer-binding protein alpha (C/EBPα), termed p30. While initial reports proposed that p30 represents a dominant-negative version of the wild-type C/EBPα protein, other studies show that p30 retains the capacity to actively regulate gene expression. Recent global transcriptomic and epigenomic analyses have advanced the understanding of the distinct roles of the p30 isoform in leukemogenesis. This review outlines direct and indirect effects of the C/EBPα p30 variant on oncogenic transformation of hematopoietic progenitor cells and discusses how studies of N-terminal CEBPA mutations in AML can be extrapolated to identify novel gain-of-function features in oncoproteins that arise from recurrent truncating mutations in transcription factors.

Keywords: C/EBPα p30; CEBPA (CCAAT/enhancer-binding protein alpha); acute myeloid leukemia; epigenetic landscape; transcription factor; truncated isoform.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • CCAAT-Enhancer-Binding Protein-alpha / genetics*
  • Gain of Function Mutation / genetics*
  • Gene Expression Regulation, Neoplastic / genetics
  • Hematopoietic Stem Cells / physiology
  • Humans
  • Leukemia, Myeloid, Acute / genetics*


  • CCAAT-Enhancer-Binding Protein-alpha