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Updated: Jul 13, 2026
07:13
Isolation and Time-Lapse Imaging of Primary Mouse Embryonic Palatal Mesenchyme Cells to Analyze Collective Movement Attributes
Published on: February 13, 2021
A dosage-dependent role for Spry2 in growth and patterning during palate development
Ian C Welsh1, Aaron Hagge-Greenberg, Timothy P O'Brien
1Department of Biomedical Sciences, Cornell University, Ithaca, NY 14853, USA.
Mechanisms of Development
|August 19, 2007
Summary
Sprouty-2 (Spry2) deficiency causes cleft palate in mice due to excessive cell proliferation and disrupted signaling. Palate development is sensitive to Spry2 dosage, highlighting the importance of FGF signaling thresholds.
Area of Science:
- Developmental biology
- Genetics
- Molecular biology
Background:
- Palate formation requires coordinated epithelial-mesenchymal interactions.
- Fibroblast Growth Factor (FGF) signaling is critical for these interactions.
- Sprouty genes modulate FGF signaling pathways.
Purpose of the Study:
- To investigate the role of Sprouty-2 (Spry2) in palate development.
- To understand how Spry2 deficiency affects FGF signaling and morphogenesis.
- To determine if Spry2 dosage is critical for normal palate formation.
Main Methods:
- Analysis of Spry2-deficient mouse models with cleft palate.
- Examination of cell proliferation, gene expression (Etv5, Msx1, Barx1, Shh), and morphogenetic movements.
- Rescue experiments using Spry2-BAC transgenes.
Main Results:
- Spry2 deficiency leads to excessive cell proliferation and abnormal morphogenesis in the developing palate.
- Elevated and ectopic expression of FGF-responsive transcription factors and disorganized Shh expression were observed.
- Spry2 dosage is critical, as hypomorphic Spry2 expression resulted in a palate defect.
Conclusions:
- Proper FGF signaling thresholds regulated by Spry2 are essential for palatal shelf outgrowth and midline fusion.
- Spry2 plays a crucial role in coordinating epithelial-mesenchymal interactions during craniofacial development.
- Dysregulation of Spry2 can lead to congenital defects like cleft palate.
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