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Updated: Aug 8, 2026

Comprehensive DNA Methylation Analysis Using a Methyl-CpG-binding Domain Capture-based Method in Chronic Lymphocytic Leukemia Patients
Published on: June 16, 2017
Enhanced expression and activity of DNA polymerase beta in chronic myelogenous leukemia
Yvan Canitrot1, Guy Laurent, Catherine Astarie-Dequeker
1Groupe Instabilité Génétique et Cancer, Institut de Pharmacologie et de Biologie Structurale, UMR CNRS 5089, Toulouse, France. canitrot@ipbs.fr
Background:
Chronic myelogenous leukemia (CML) is characterized by an initial chronic phase that invariably evolves to the more aggressive phase of blast crisis. Although the determinants of this transition are still unknown, it has been shown that the blast crisis is accompanied by genetic instability.
Materials And Methods:
The expression and activity of the error-prone DNA polymerase beta (pol beta) were investigated in blood samples from CML patients, by Western blotting and by an in vitro replication assay, respectively.
Results:
Pol beta expression and activity were significantly higher in CML samples compared to those of healthy donors.
Conclusion:
Our results suggest that the excess of pol beta in CML could contribute to the genetic instability observed during the evolution of the disease from the chronic phase to blast crisis.
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