The Hippo Pathway Regulates Wnt/β-Catenin Signaling

Xaralabos Varelas, Bryan W. Miller, Richelle Sopko, Siyuan Song, Alex Gregorieff, Frederic A. Fellouse, Rui Sakuma, Tony Pawson, Walter Hunziker, Helen McNeill, Jeffrey L. Wrana, Liliana Attisano

Research output: Contribution to journalArticlepeer-review

406 Scopus citations

Abstract

Several developmental pathways contribute to processes that regulate tissue growth and organ size. The Hippo pathway has emerged as one such critical regulator. However, how Hippo signaling is integrated with other pathways to coordinate these processes remains unclear. Here, we show that the Hippo pathway restricts Wnt/β-Catenin signaling by promoting an interaction between TAZ and DVL in the cytoplasm. TAZ inhibits the CK1δ/e{open}-mediated phosphorylation of DVL, thereby inhibiting Wnt/β-Catenin signaling. Abrogation of TAZ levels or Hippo signaling enhances Wnt3A-stimulated DVL phosphorylation, nuclear β-Catenin, and Wnt target gene expression. Mice lacking Taz develop polycystic kidneys with enhanced cytoplasmic and nuclear β-Catenin. Moreover, in Drosophila, Hippo signaling modulates Wg target gene expression. These results uncover a cytoplasmic function of TAZ in regulating Wnt signaling and highlight the role of the Hippo pathway in coordinating morphogenetic signaling with growth control.

Original languageEnglish
Pages (from-to)579-591
Number of pages13
JournalDevelopmental cell
Volume18
Issue number4
DOIs
StatePublished - Apr 2010

Keywords

  • Cellbio
  • Signaling

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