Histone deacetylases (HDACs) mediate regulation of gene expression via changes in nucleosome conformation. Dysregulation of histone acetylation, can lead to the development of cancers. There is renewed interest in capitalizing new breakthroughs in epigenetic research to address oncology therapy. Epigenetic regulation and subsequent gene expression or silencing represents a tightly orchestrated interplay among enzymes responsible for modifying the tails of histones, around which nuclear DNA is wrapped.