Antagonistic crosstalk of Wnt/β-catenin/Bmp signaling within the Apical Ectodermal Ridge (AER) regulates interdigit formation

Mylah Villacorte, Kentaro Suzuki, Katsuhiko Hayashi, Susana Chuva de Sousa Lopes, Ryuma Haraguchi, Makoto M. Taketo, Naomi Nakagata, Gen Yamada

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12 Citations (Scopus)

Abstract

Digit and interdigit (D/ID) development is one of the important research fields in molecular developmental biology. Interdigital cell death (ICD) is a morphogenetic event which has been considered as an essential process for D/ID formation. Although some growth factors including Bmp and Fgf signaling can modulate ICD, growth factor crosstalk regulating ICD is poorly understood. Wnt canonical pathway and Bmp signal crosstalk has been considered as the essential growth factor crosstalk in organogenesis. To elucidate the crosstalk to regulate the D/ID formation, we analyzed conditional mutant mice with limb bud ectoderm expressing constitutively activated β-catenin signaling. We showed that modulation of Wnt/β-catenin signal in the limb ectoderm including the AER regulates ID apoptosis. We also demonstrated that Wnt/β-catenin signaling in the ectoderm can positively regulate Fgf8 possibly antagonizing the epithelial derived Bmp signaling. Human birth defects for digit abnormalities have been known to be affected by multiple parameters. Elucidation of the potential mechanisms underlying such D/ID development is an urgent medical issue to be solved. This work would be one of the first studies showing essential growth factor cascades in the D/ID formation.

Original languageEnglish
Pages (from-to)1653-1657
Number of pages5
JournalBiochemical and Biophysical Research Communications
Volume391
Issue number4
DOIs
Publication statusPublished - Jan 22 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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