Abstract

Disruptions in post-translational modifications of chromatin structure promote uncontrollable cell growth branded as a hallmark of tumor lesions. The overexpression/hyperactivity of histone deacetylases (HDACs) is a common feature for the tumorogenesis and cancer progression. Several inhibitors of histone deacetylases (mainly hydroxamic acid derivatives) have been successfully used as drugs in fighting tumor formations. However, there is no systematic study on the factors controling the affinity and selectivity of this type of inhibitors to the host enzyme thus hampering successful rational design of more potent and selective anticancer drugs. Herein, in an attempt to illuminate the mechanism of the host – guest interactions in these systems at atomic level we systematically study the effect of various factors in the process and unravel its key determinants.  Density functional theory calculations have been employed. Our findings have the potential to be employed as guidelines in designing new HDAC inhibitors with improved anticancer properties.

Keywords: Cancer; Density Functional Theory; Histone Deacetylase Inhibitors; Molecular Modeling; SAHA;

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Toshev, N.; Cheshmedzhieva, D.; Dudev, T. Beilstein Arch. 2020, 2020121. doi:10.3762/bxiv.2020.121.v1

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