Abstract
Abstract Aberrations in the epigenetic machinery of the genome result in inactivation of critical genes and are important mechanisms in the evolution of malignancies that not only contributes to tumorigenesis but may also precede genetic changes. Several such epigenetic mechanisms have been observed in gliomas including DNA hypermethylation at the promoter or the coding regions of genes, histone modifications including methylation and acetylation, nucleosomal rearrangement, and dysregulation of noncoding RNA expression; these changes have been shown to play a critical role in the biology of gliomas and to contribute to the clinical outcome. This review examines the general role of epigenetic changes in the malignant process and focuses on the known changes in gene expression in gliomas due to epigenetic modifications, both in the context of gliomagenesis and in the development of new therapeutic strategies against these malignancies.
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