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EVI1 drives leukemogenesis through aberrant ERG activation.

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Aggressive acute myeloid leukemia (AML) driven by the ecotropic viral integration site 1 (EVI1) oncogene relies on its target, the ETS transcription factor ERG. Targeting this EVI1-ERG axis offers a new therapeutic strategy for AML.

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Area of Science:

  • Hematology
  • Oncology
  • Molecular Biology

Background:

  • The MECOM gene rearrangements characterize an aggressive AML subtype.
  • This AML subtype exhibits chemotherapy resistance and poor prognosis.
  • Understanding EVI1 oncogene function is crucial for developing novel AML therapies.

Purpose of the Study:

  • To elucidate the gene regulatory functions and dependencies of EVI1 in AML.
  • To identify novel therapeutic targets in EVI1-driven AML.

Main Methods:

  • Developed human and murine AML disease models.
  • Investigated transcriptional changes upon EVI1 withdrawal in vitro and in vivo.
  • Performed genome-wide CRISPR screens in EVI1-dependent AML.

Main Results:

  • Identified ERG as a direct transcriptional target of EVI1.
  • ERG is aberrantly expressed and essential in both human and murine EVI1-driven AML.
  • EVI1 regulates ERG via a conserved intragenic enhancer.

Conclusions:

  • EVI1 oncogenic functions are largely mediated by aberrant ERG activation.
  • ERG suppression induces AML cell differentiation.
  • Targeting the EVI1-ERG regulatory axis presents a promising therapeutic strategy for AML.