Cleft palate is a common birth defect in humans and is a common phenotype associated with syndromic mutations in fibroblast growth factor receptor 2 (Fgfr2). Cleft palate occurred in nearly all mice homozygous for the Crouzon syndrome mutation C342Y in the mesenchymal splice formof Fgfr2. Mutantembryos showed delayed palate elevation, stage-specific biphasic changes in palate mesenchymal proliferation, and reduced levels ofmesenchymal glycosaminoglycans (GAGs). Reduced levels of feedback regulators of FGF signaling suggest that this gain-of-function mutation in FGFR2 ultimately resembles loss of FGF functionin palatemesenchyme.Knowledge of how mesenchymal FGF signaling regulates palatal shelf development may ultimately lead to pharmacological approaches to reduce cleft palate incidence in genetically predisposed humans.

Original languageEnglish
Pages (from-to)2515-2520
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number6
StatePublished - Feb 9 2010


  • Cell proliferation
  • Cell surface receptor
  • Crouzon syndrome
  • Fibroblast growth factor receptor 2
  • Glycosaminoglycan


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