Wnt/β-catenin signaling acts upstream of N-myc, BMP4, and FGF signaling to regulate proximal-distal patterning in the lung

Weiguo Shu, Susan Guttentag, Zhishan Wang, Thomas Andl, Philip Ballard, Min Min Lu, Stefano Piccolo, Walter Birchmeier, Jeffrey A. Whitsett, Sarah E. Millar, Edward E. Morrisey

Research output: Contribution to journalArticlepeer-review

254 Scopus citations

Abstract

Branching morphogenesis in the lung serves as a model for the complex patterning that is reiterated in multiple organs throughout development. β-catenin and Wnt signaling mediate critical functions in cell fate specification and differentiation, but specific functions during branching morphogenesis have remained unclear. Here, we show that Wnt/β-catenin signaling regulates proximal-distal differentiation of airway epithelium. Inhibition of Wnt/β-catenin signaling, either by expression of Dkk1 or by tissue-specific deletion of β-catenin, results in disruption of distal airway development and expansion of proximal airways. Wnt/β-catenin functions upstream of BMP4, FGF signaling, and N-myc. Moreover, we show that β-catenin and LEF/TCF activate the promoters of BMP4 and N-myc. Thus, Wnt/β-catenin signaling is a critical upstream regulator of proximal-distal patterning in the lung, in part, through regulation of N-myc, BMP4, and FGF signaling.

Original languageEnglish
Pages (from-to)226-239
Number of pages14
JournalDevelopmental Biology
Volume283
Issue number1
DOIs
StatePublished - 1 Jul 2005
Externally publishedYes

Keywords

  • BMP
  • Dickkopf-1
  • FGF
  • Lung development
  • Wnt
  • β-catenin

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