Epigenetic Reprogramming of TGF-β Signaling in Breast Cancer
CANCERS(2019)
Abstract
The Transforming Growth Factor-beta (TGF-beta) signaling pathway has a well-documented, context-dependent role in breast cancer development. In normal and premalignant cells, it acts as a tumor suppressor. By contrast, during the malignant phases of breast cancer progression, the TGF-beta signaling pathway elicits tumor promoting effects particularly by driving the epithelial to mesenchymal transition (EMT), which enhances tumor cell migration, invasion and ultimately metastasis to distant organs. The molecular and cellular mechanisms that govern this dual capacity are being uncovered at multiple molecular levels. This review will focus on recent advances relating to how epigenetic changes such as acetylation and methylation control the outcome of TGF-beta signaling and alter the fate of breast cancer cells. In addition, we will highlight how this knowledge can be further exploited to curb tumorigenesis by selective targeting of the TGF-beta signaling pathway.
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Key words
breast cancer,epigenetics,epithelial to mesenchymal transition,signal transduction,SMAD,TGF-beta
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