Abstract
Inhibitors of histone deacetylases (HDACs) have emerged as a new class of anticancer agents based on their actions in cancer cell growth and cell cycle arrest, terminal differentiation, and apoptosis. Previously, we rationally designed and developed a new class of hydroxamide- and mercaptoacetamide-bearing HDAC inhibitors. A subset of these inhibitors exhibited chemo-radiation sensitizing properties in various human cancer cells. Furthermore, some HDAC inhibitors protected normal cells from radiation-induced damage and extended the survival of mice following total body exposure to lethal dose radiation. Pathological analyses revealed that intestinal and bone marrow cellularities recovered significantly from radiation-induced damage by structural compartments restoration, suggesting the mechanism of action of these HDAC inhibitors. These findings support the hypothesis that epigenetic regulation may play a crucial role in the functional recovery of normal tissues from radiation injuries.
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Acknowledgments
We thank S. Lee and J. Tuturea for technical support. This work was supported in part by USMRC grants PC030471 (M. Jung) as well as the Lombardi Comprehensive Cancer Center Microscopy and Imaging Shared Resource, US Public Health Service Grant 2P30-CA-51008 and 1S10 RR15768-01.
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Konsoula, Z., Velena, A., Lee, R., Dritschilo, A., Jung, M. (2011). Histone Deacetylase Inhibitor: Antineoplastic Agent and Radiation Modulator. In: Rhim, J., Kremer, R. (eds) Human Cell Transformation. Advances in Experimental Medicine and Biology, vol 720. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0254-1_14
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DOI: https://doi.org/10.1007/978-1-4614-0254-1_14
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