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A new duet in cancer biology: AMPK the typical and UBE2O the atypical

Isabelle K Vila1, Su Jung Song2, Min Sup Song1,3

  • 1Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.

Molecular & Cellular Oncology
|June 16, 2017
PubMed

Insights

Ubiquitin-conjugating enzyme E2O (UBE2O) promotes cancer by degrading AMPKα2. Blocking UBE2O inhibits tumor growth by targeting the mTORC1-HIF-1α pathway, offering a new therapeutic strategy.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • Ubiquitin-conjugating enzyme E2O (UBE2O) is elevated in various human cancers.
  • UBE2O plays a significant role in tumor progression and development.

Purpose of the Study:

  • To investigate the role of UBE2O in tumorigenesis.
  • To identify UBE2O as a potential therapeutic target for cancer treatment.

Main Methods:

  • Genetic deletion and pharmacological inhibition of UBE2O in cancer models.
  • Analysis of the mammalian target of rapamycin complex 1-hypoxia-inducible factor 1-α (mTORC1-HIF-1α) pathway.
  • Assessment of adenosine monophosphate (AMP)-activated protein kinase-α 2 (AMPKα2) ubiquitination and degradation.

Main Results:

  • Genetic or pharmacological inhibition of UBE2O significantly reduces tumor growth.
  • UBE2O blockade effectively suppresses the mTORC1-HIF-1α pathway.
  • UBE2O directly targets AMPKα2 for ubiquitination and subsequent degradation.

Conclusions:

  • The UBE2O-AMPKα2 axis is a critical regulator of cancer cell proliferation.
  • Targeting UBE2O presents a promising therapeutic strategy for human cancers by modulating the mTORC1-HIF-1α pathway and stabilizing AMPKα2.
Keywords:
AMPKAMPKα2HIF1αUBE2Oarsenitebreast cancercancer metabolismmTORprostate cancerubiquitination

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