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BCR-ABL1 kinase-dependent alteration of mRNA metabolism: potential alternatives for therapeutic intervention

Danilo Perrotti1, Jason G Harb

  • 1Human Cancer Genetics Program, Depatment of Molecular Virology, Immunology and Medical Genetics, Comprehensive Cancer Center and Center for RNA Biology, The Ohio State University, Columbus, OH 43210-2207, USA. danilo.perrotti@osumc.edu

Leukemia & Lymphoma
|February 9, 2011
PubMed

Insights

First- and second-generation tyrosine kinase inhibitors (TKIs) are effective for chronic myeloid leukemia (CML) but fail in blastic transformation. Targeting mRNA metabolism in BCR-ABL1 myeloid blast crisis CML progenitors offers a promising therapeutic strategy.

Area of Science:

  • Hematology
  • Oncology
  • Molecular Biology

Background:

  • First- and second-generation tyrosine kinase inhibitors (TKIs) improve outcomes for early chronic phase chronic myeloid leukemia (CML).
  • TKIs are ineffective against blastic transformation and do not eradicate CML at the stem cell level.
  • BCR-ABL1 expression and activity's role in blastic transformation and its origin at the stem cell or progenitor level remain unclear.

Purpose of the Study:

  • To review mechanisms of deregulated mRNA metabolism in BCR-ABL1 myeloid blast crisis CML progenitors.
  • To explore the potential of restoring normal mRNA levels for therapeutic benefit.
  • To discuss pharmacologic inhibitors targeting these mechanisms for clinical application.

Main Methods:

  • Review of existing literature on CML pathogenesis, TKI resistance, and mRNA metabolism.
  • Analysis of molecular mechanisms underlying altered mRNA processing, translation, and degradation in CML blast crisis.
  • Evaluation of preclinical data on pharmacologic inhibitors targeting mRNA metabolism.

Main Results:

  • Altered mRNA metabolism contributes to CML blast crisis by affecting translation of key genes.
  • Decreased translation of tumor suppressors and increased translation of anti-apoptotic genes are observed.
  • Pharmacologic inhibitors targeting mRNA metabolism show encouraging preclinical results.

Conclusions:

  • Targeting mRNA metabolism represents a promising therapeutic avenue for CML blastic transformation.
  • Restoring normal mRNA levels could counteract leukemia in stem cells.
  • Further clinical studies are warranted to evaluate the efficacy of these inhibitors.

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