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Published on: July 3, 2013

PLCɛ and the RASSF family in tumour suppression and other functions

Jia Jia Chan1, Matilda Katan

  • 1Institute of Structural and Molecular Biology, Division of Biosciences, University College London, Gower Street, London WC1E 6BT, UK.

Advances in Biological Regulation
|August 21, 2013
PubMed

Insights

Phospholipase C epsilon (PLCɛ) and Ras-association domain family (RASSF) proteins can suppress tumors. Recent research highlights novel functions and pathways for RASSF members, reinforcing their tumor-suppressive roles.

Area of Science:

  • Molecular Biology
  • Oncology
  • Cellular Biology

Background:

  • Ras oncoproteins are key regulators of cell signaling, often dysregulated in cancer.
  • While some Ras-binding proteins promote tumors, others, like Phospholipase C epsilon (PLCɛ) and the Ras-association domain family (RASSF), exhibit tumor-suppressive functions.
  • The RASSF family (RASSF1-RASSF10) possesses a Ras-association (RA) domain for Ras binding and RASSF1-6 have a SARAH domain for protein interactions.

Purpose of the Study:

  • To review the emerging tumor-suppressive role of PLCɛ.
  • To summarize recent findings (last five years) on the RASSF family.
  • To consolidate established RASSF functions and highlight novel regulatory roles.

Main Methods:

  • Literature review of recent studies on PLCɛ and RASSF proteins.
  • Analysis of molecular mechanisms underlying RASSF function and regulation.
  • Focus on epigenetic silencing and biological processes regulated by RASSFs.

Main Results:

  • RASSF proteins are frequently downregulated by epigenetic silencing in various cancers.
  • RASSFs are involved in critical cellular processes including apoptosis, cell cycle regulation, and microtubule stabilization.
  • Recent evidence reveals new pathways and functions, expanding the known tumor-suppressive roles of RASSFs.

Conclusions:

  • PLCɛ and RASSF proteins represent important tumor suppressors, counteracting oncogenic Ras signaling.
  • The RASSF family's tumor-suppressive properties are well-established and further supported by recent discoveries.
  • Continued research into RASSF family members is crucial for understanding their broader roles in cancer biology and developing novel therapeutic strategies.

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