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Monitoring Hippo Signaling Pathway Activity Using a Luciferase-based Large Tumor Suppressor LATS Biosensor
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Energy stress tames the Hippo pathway

Iswar K Hariharan1

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, USA.

Nature Cell Biology
|March 28, 2015
PubMed

Insights

AMP-activated protein kinase (AMPK) opposes YAP's growth promotion, explaining how metformin may protect against cancer. This energy stress sensor

Area of Science:

  • Cellular biology
  • Molecular signaling
  • Metabolic regulation

Background:

  • AMP-activated protein kinase (AMPK) is a key sensor of cellular energy status.
  • Yes-associated protein (YAP) is a transcriptional co-activator regulated by the Hippo signaling pathway.
  • YAP activation promotes cell growth and is implicated in cancer development.

Purpose of the Study:

  • To investigate the regulatory relationship between AMPK and YAP.
  • To explore the implications of this relationship for cancer prevention by metformin.

Main Methods:

  • Utilized molecular biology techniques to study AMPK and YAP interactions.
  • Investigated the effects of metformin on AMPK and YAP activity in cellular models.

Main Results:

  • Demonstrated that AMPK activation inhibits the growth-promoting activity of YAP.
  • Established AMPK as a key mediator of metformin's effects.

Conclusions:

  • AMPK acts as a negative regulator of YAP, counteracting its pro-growth effects.
  • The findings provide a molecular mechanism for the observed cancer-protective effects of metformin, linking energy metabolism to cancer signaling.

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