The interaction of histone deacetylase inhibitors and DNA methyltransferase inhibitors in the treatment of human cancer cells

Current Medicinal Chemistry. Anti-cancer Agents
Wei-Guo Zhu, Gregory A Otterson

Abstract

The potential anticancer activities of histone deacetylase (HDAC) inhibitors and DNA methyltransferase (DNMT) inhibitors have been extensively studied in recent years. HDAC inhibitors suppress the activities of multiple HDACs, leading to an increase in histone acetylation. This histone acetylation induces an enhancement of the expression of specific genes that elicit extensive cellular morphologic and metabolic changes, such as growth arrest, differentiation and apoptosis. DNMT inhibitors, such as 5-aza-cytidine (5-aza-CR) and 5-aza-2'-deoxycytidine (5-aza-CdR) are also widely studied because DNA hypomethylation induces the re-activation of tumor suppressor genes that are silenced by methylation-mediated mechanisms. Recently, the combination of HDAC inhibitors or demethylating agents with other chemo-therapeutics has gained increasing interest as a possible molecularly targeted therapeutic strategy. In particular, the combination of HDAC inhibitors with demethylating agents has become attractive since histones are connected to DNA by both physical and functional interactions. To date, the accumulating evidence has confirmed the hypothesis that the combination of HDAC and DNMT inhibition is very effective (and synergistic) in in...Continue Reading

Citations

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