Ras Post-transcriptionally Enhances a Pre-malignantly Primed EMT to Promote Invasion.


Journal Article

Epithelial-to-mesenchymal transition (EMT) is integral to cancer progression, with considerable evidence that EMT has multiple intermediary stages. Understanding the mechanisms of this stepwise activation is of great interest. We recreated a genetically defined model in which primary cells were immortalized, resulting in migratory capacity, and subsequently H-Ras-transformed, causing malignancy and invasion. To determine the mechanisms coordinating stepwise malignancy, we quantified the changes in messenger RNA (mRNA) and protein abundance. During immortalization, we found dramatic changes in mRNA, consistent with EMT, which correlated with protein abundance. Many of these same proteins also changed following Ras transformation, suggesting that pre-malignant cells were primed for malignant conversion. Unexpectedly, changes in protein abundance did not correlate with changes in mRNA following transformation. Importantly, proteins involved in cellular adhesion and cytoskeletal structure decreased during immortalization and decreased further following Ras transformation, whereas their encoding mRNAs only changed during the immortalization step. Thus, Ras induced EMT-associated invasion via post-transcriptional mechanisms in primed pre-malignant cells.

Full Text

Duke Authors

Cited Authors

  • Bisogno, LS; Friedersdorf, MB; Keene, JD

Published Date

  • June 29, 2018

Published In

Volume / Issue

  • 4 /

Start / End Page

  • 97 - 108

PubMed ID

  • 30240757

Pubmed Central ID

  • 30240757

Electronic International Standard Serial Number (EISSN)

  • 2589-0042

Digital Object Identifier (DOI)

  • 10.1016/j.isci.2018.05.011


  • eng

Conference Location

  • United States