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Translational regulation by the p210 BCR/ABL oncoprotein

Danilo Perrotti1, Bruno Calabretta

  • 1Human Cancer Genetics Program, Department of Molecular Virology, Immunology and Medical Genetics and the Comprehensive Cancer Center, The Ohio State University, Columbus OH 43210, USA. perrotti-1@medctr.osu.edu

Oncogene
|April 20, 2004
PubMed

Insights

Oncogenic proteins regulate mRNA translation to control protein levels. Targeting RNA-binding proteins in chronic myelogenous leukemia may offer new therapeutic strategies for leukemic cell survival and differentiation.

Area of Science:

  • Molecular Biology
  • Cancer Biology
  • Hematology

Background:

  • Oncogenic proteins can rapidly modulate protein levels by regulating specific mRNA translation rates.
  • RNA-binding proteins with translation regulatory activity are upregulated in the blast crisis of chronic myelogenous leukemia (CML).
  • CML blast crisis represents the most aggressive stage of the disease.

Purpose of the Study:

  • To investigate the role of RNA-binding proteins in CML pathogenesis.
  • To identify specific mRNA targets regulated by these proteins.
  • To explore therapeutic strategies targeting these regulatory mechanisms.

Main Methods:

  • Identification and characterization of RNA-binding proteins overexpressed in CML blast crisis.
  • Analysis of mRNA targets translationally regulated by these proteins.
  • Perturbation of RNA-binding protein activity in BCR/ABL-expressing cells.

Main Results:

  • Several RNA-binding proteins with translation regulatory activity were identified in CML blast crisis.
  • Perturbing the activity of these proteins reduced the leukemogenic potential of BCR/ABL-expressing cells.
  • Key mRNA targets, including c/ebp alpha and mdm2, were identified, which are relevant to leukemic cell differentiation and survival.

Conclusions:

  • RNA-binding proteins play a significant role in CML progression by regulating translation of specific mRNAs.
  • Targeting these RNA-binding proteins or their mRNA targets presents a potential therapeutic avenue for CML.
  • Modulating translation rates of specific mRNAs could be a novel strategy for cancer therapy.

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