May 7, 2013

Multifaceted role of EZH2 in breast and prostate tumorigenesis: epigenetics and beyond

Epigenetics : Official Journal of the DNA Methylation Society
Gauri DebSanjay Gupta

Abstract

Overexpression of EZH2 and other PRC2 subunits, such as SUZ12, is associated with tumor progression and poor prognosis in several human malignancies. Nevertheless, the underlying mechanisms driving aberrant EZH2 expression are poorly understood. This review provides molecular insights into the essential role of EZH2 in breast and prostate tumorigenesis. We addressed the current understanding on the oncogenic role of EZH2, with an emphasis on: (1) the less known PRC2-independent role of EZH2 in gene activation, in addition to its canonical role in transcriptional silencing as a histone methyltransferase catalyzing the trimethylation of histone H3 at lysine 27; (2) causes and consequences of its deregulation in tumor cells and; (3) collaboration of EZH2 with other epigenetic and hormone receptor-mediated oncogenic signaling pathways. We also summarize how EZH2 has emerged as a promising therapeutic target in hormone-refractory cancers and the prospects for integrating EZH2 blockade with available pharmacological inhibitors.

Mentioned in this Paper

Tumor Cells, Uncertain Whether Benign or Malignant
Biochemical Pathway
SUZ12 gene
Transcription, Genetic
Neoplasms
Hormone Receptor
Histone methyltransferase
NR4A1 gene
Polycomb Repressive Complex 2
Lysine

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