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The histone deacetylase inhibitor suberoylanilide hydroxamic acid down-regulates expression levels of Bcr-abl, c-Myc and HDAC3 in chronic myeloid leukemia cell lines

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In chronic myelocytic leukemia (CML) the activity of the Bcr-Abl tyrosine kinase is known to activate a number of molecular mechanisms, which inhibit apoptosis. In the present study, we show that the histone deacetylase inhibitor SAHA (suberoylanilide hydroxamic acid) markedly decreases protein expression levels of Bcr-Abl and c-Myc in BV-173 cells, while in K562 cells only a minor decrease of Bcr-Abl protein levels is observed while a considerable reduction of c-Myc protein expression may only be achieved at higher concentrations of SAHA. In addition, we found BV-173 cells to be more sensitive to SAHA-induced apoptosis when compared to K562 cells. Even though earlier reports on SAHA considerably focused on its inhibitory effect on HDAC enzymatic activity, we report herein a significant down-regulation of HDAC3 protein expression levels following treatment with SAHA in BV-173 cells, but not in K562 cells. In conclusion, our results imply a molecular mechanism for SAHA-induced apoptosis in BV-173 cells, which involves decreased protein expression levels of Bcr-Abl, c-Myc and HDAC3.
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Document Type: Research Article

Affiliations: Department of Hematology/Oncology, University of Heidelberg Medical Center, Heidelberg, Germany

Publication date: January 1, 2005

More about this publication?
  • The International Journal of Molecular Medicine is a monthly, peer-reviewed journal devoted to the publication of high quality studies related to the molecular mechanisms of human disease. The journal welcomes research on all aspects of molecular and clinical research, ranging from biochemistry to immunology, pathology, genetics, human genomics, microbiology, molecular pathogenesis, molecular cardiology, molecular surgery and molecular psychology.

    The International Journal of Molecular Medicine aims to provide an insight for researchers within the community in regard to developing molecular tools and identifying molecular targets for the diagnosis and treatment of a diverse number of human diseases.
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