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Oncogene

Epigenetic activation of the prostaglandin receptor EP4 promotes resistance to endocrine therapy for breast cancer.


PMID 27869171

Abstract

Approximately 75% of breast cancers express estrogen receptor α (ERα) and depend on estrogen signals for continued growth. Aromatase inhibitors (AIs) prevent estrogen production and inhibit ER signaling, resulting in decreased cancer recurrence and mortality. Advanced tumors treated with AIs almost always develop resistance to these drugs via the upregulation of alternative growth signals. The mechanisms that drive this resistance-especially epigenetic events that alter gene expression-are, however, not well understood. Genome-wide DNA methylation and expression analysis of cell line models of acquired AI resistance indicated that prostaglandin E

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