The Hippo pathway in clear cell renal cell carcinoma (ccRCC): a nexus with the VHL disruption?

T Waeckel1, R Lefranc1, M Waeckel2

  • 1Université de Caen Normandie, CNRS, Normandie Univ, ISTCT UMR6030, CYCERON, F-14000 Caen, France; Centre Hospitalier Universitaire de Caen Normandie, Service d'Urologie et Transplantation, 14000 CAEN, France.

PubMed
Abstract

Insights

The Hippo pathway is altered in clear cell renal cell carcinoma (ccRCC), impacting tumor progression and survival. Targeting the Hippo-VHL axis offers new biomarkers and therapies for ccRCC patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Clear cell renal cell carcinoma (ccRCC) has a high recurrence rate, lacking reliable biomarkers for patient stratification.
  • While VHL gene alterations are known drivers, the Hippo pathway's role in ccRCC is underexplored.

Purpose of the Study:

  • To review Hippo pathway alterations in ccRCC.
  • To examine Hippo pathway crosstalk with the VHL/HIF axis.
  • To identify potential ccRCC biomarkers and therapeutic targets.

Main Methods:

  • Comprehensive literature analysis of Hippo pathway components in ccRCC.
  • Focus on molecular mechanisms, clinical correlations, and VHL signaling interactions.

Main Results:

  • Hippo pathway alterations (RASSF1A hypermethylation, NF2 mutations, SAV1 downregulation, LATS1/2 inactivation) lead to YAP/TAZ activation in ccRCC.
  • Simultaneous 3p loss affects both VHL and RASSF1, creating a double-hit scenario.
  • VHL-Hippo crosstalk involves HIF-induced signaling inhibiting LATS1/2 and YAP/TAZ promoting angiogenesis; low RASSF1A/SAV1/LATS1/2 and high YAP/TAZ correlate with poor prognosis.

Conclusions:

  • The Hippo pathway is a critical, underappreciated factor in ccRCC biology.
  • Hippo pathway alterations offer promising biomarkers for ccRCC risk stratification.
  • The Hippo-VHL nexus provides novel therapeutic intervention points for ccRCC.

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