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ADARs Edit MicroRNAs to Promote Leukemic Stem Cell Activity

Wen Cai Zhang1, Frank J Slack1

  • 1Institute for RNA Medicine, Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA.

Cell Stem Cell
|August 6, 2016
PubMed

Insights

Targeting the RNA editing enzyme ADAR1 can restore let-7 expression and kill leukemic stem cells (LSCs) in chronic myeloid leukemia (CML). This finding offers a novel therapeutic strategy for CML treatment.

Area of Science:

  • Hematology
  • Molecular Biology
  • Cancer Research

Background:

  • Leukemic stem cells (LSCs) are critical drivers of chronic myeloid leukemia (CML) progression.
  • Mechanisms underlying LSC-driven CML and tyrosine kinase inhibitor (TKI) resistance are not fully understood.

Purpose of the Study:

  • To investigate novel therapeutic targets for chronic myeloid leukemia (CML).
  • To explore the role of RNA editing in LSC function and CML pathogenesis.

Main Methods:

  • The study focused on the RNA editing enzyme ADAR1.
  • Investigated the impact of targeting ADAR1 on let-7 microRNA expression.
  • Assessed the effect of ADAR1 targeting on leukemic stem cell (LSC) viability.

Main Results:

  • Targeting ADAR1 was shown to restore the expression of let-7 microRNAs.
  • Efficient killing of leukemic stem cells (LSCs) was observed upon ADAR1 inhibition.
  • This suggests a direct link between ADAR1 activity, let-7 levels, and LSC survival.

Conclusions:

  • The RNA editing enzyme ADAR1 represents an innovative therapeutic target in chronic myeloid leukemia (CML).
  • Restoring let-7 expression by targeting ADAR1 offers a promising strategy for eradicating CML stem cells.

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