Abstract
Epigenetic changes, including DNA methylation and histone modification, play key roles in the dysregulation of tumor-related genes, thereby affecting numerous cellular processes, including cell proliferation, cell adhesion, apoptosis, and metastasis. In recent years, numerous studies have shown that noncoding RNAs (ncRNAs) are key players in the initiation and progression of cancer and epigenetic mechanisms are deeply involved in their dysregulation. Indeed, the growing list of microRNA (miRNA) genes aberrantly methylated in cancer suggests that a large number of miRNAs exert tumor-suppressive or oncogenic effects. In addition, it now appears that long ncRNAs may be causally related to epigenetic dysregulation of critical genes in cancer. Dissection of the relationships between ncRNAs and epigenetic alterations may lead to the development of novel approaches to the diagnosis and treatment of cancer.
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