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Monitoring Hippo Signaling Pathway Activity Using a Luciferase-based Large Tumor Suppressor (LATS) Biosensor
07:16

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The Hippo signaling pathway restricts the oncogenic potential of an intestinal regeneration program

Jing Cai1, Nailing Zhang, Yonggang Zheng

  • 1Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.

Genes & Development
|November 3, 2010
PubMed

Insights

Hippo signaling, involving Yes-associated protein (YAP), is crucial for intestinal regeneration. Its controlled activity balances compensatory proliferation and prevents polyp formation during tissue repair after injury.

Area of Science:

  • Cell Biology
  • Gastroenterology
  • Developmental Biology

Background:

  • The Hippo signaling pathway regulates organ size during development.
  • Its role in adult tissue regeneration, particularly in the intestine, remains unclear.

Purpose of the Study:

  • To investigate the function of Hippo signaling, specifically Yes-associated protein (YAP), in colonic tissue regeneration.
  • To understand the implications of YAP activity in intestinal repair and polyp formation.

Main Methods:

  • Utilized a dextran sodium sulfate (DSS)-induced mouse model for colonic regeneration.
  • Analyzed Yes-associated protein (YAP) expression levels in regenerating intestinal crypts.
  • Studied the effects of YAP inactivation and hyperactivation on DSS-induced intestinal regeneration and polyp formation.

Main Results:

  • Regenerating colonic crypts showed increased Yes-associated protein (YAP) levels.
  • YAP inactivation impaired DSS-induced intestinal regeneration but had no effect on normal intestinal homeostasis.
  • YAP hyperactivation led to early-onset polyp formation following DSS treatment.

Conclusions:

  • Yes-associated protein (YAP) is essential for effective colonic tissue regeneration.
  • Precise control of YAP activity is critical during regeneration to promote compensatory proliferation while preventing oncogenic transformation.

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