In recent years, there has been an expansion of the understanding of how epigenetic dysregulation plays
a role in tumorigenesis, progression, metastasis and treatment resistance. Evidence has focused on two common
and well-studied “epigenetic codes”, i.e., DNA methylation and histone posttranslational modification, which
regulate the transcriptional status in various types of cancer and the corresponding target agents.
Aside from “writers” and “erasers”, which refer to enzymes that catalyze and remove posttranslational modifications,
respectively, “readers” bind to target proteins and recruit “writers” and “erasers” for regulating gene expression.
A number of selective and potent anticancer compounds have been reported, some of which are in preclinical
or clinical trials that have shown promising results, primarily against malignant neoplasms such as hematologic
malignancies, with the subsequent emerging development of both monotherapy and co-administration with traditional cytotoxic
medicines against solid tumors. Second-generation epigenetic agents such as EZH2 and BET inhibitors have greatly progressed.
Epigenetic dysregulation has also provided feasibility for the diagnosis and treatment of cancer. In this review, we summarize the
progress in epigenetics and drug discovery for cancer and certain clinical trials that may provide a perspective for future development.