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Multiple pathways regulated by the tumor suppressor PP2A in transformation

Jukka Westermarck1, William C Hahn

  • 1Institute of Medical Technology, University of Tampere and Tampere University Hospital, 33520 Tampere, Finland.

Trends in Molecular Medicine
|March 11, 2008
PubMed

Insights

Protein phosphatase 2A (PP2A) inactivation contributes to cancer by altering cell signaling. This review covers PP2A

Area of Science:

  • Molecular biology
  • Cellular signaling
  • Cancer research

Background:

  • Reversible protein phosphorylation is crucial for intracellular signaling.
  • Dysregulation of phosphorylation mechanisms contributes to cancer initiation and progression.
  • While oncogenic kinases are well-studied, protein phosphatases also play significant roles in malignancy.

Purpose of the Study:

  • To review the role of Protein phosphatase 2A (PP2A) in cancer pathogenesis.
  • To elucidate how PP2A regulates mitogenic signaling pathways in cancer.
  • To discuss the modulation of PP2A activity in human cancers.

Main Methods:

  • Literature review of recent scientific progress.
  • Analysis of PP2A's role in regulating phosphorylation events.
  • Examination of PP2A inactivation mechanisms in cancer.

Main Results:

  • PP2A is the primary serine-threonine phosphatase in mammalian cells.
  • Inactivation of PP2A, through viral oncoproteins, mutations, or inhibitors, promotes cell transformation.
  • PP2A regulates key mitogenic signaling pathways implicated in cancer.

Conclusions:

  • PP2A inactivation is a significant factor in cancer development.
  • Understanding PP2A's regulatory mechanisms in cancer is critical for therapeutic strategies.
  • Further research into PP2A modulation in human cancers is warranted.

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