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Updated: Oct 4, 2025
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Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchyme Cells for Phosphoprotein Analysis
Published on: April 1, 2022
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Wnt/β-catenin Signaling Controls Maxillofacial Hyperostosis
J Chen1,2, P L Cuevas1, J S Dworan1,3
1Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Palo Alto, CA, USA.
Journal of Dental Research
|February 4, 2022
Summary
Constitutively active Wnt/β-catenin signaling in mice causes progressive craniomaxillofacial bone overgrowth and abnormal matrix. This highlights a feedback loop impacting bone development and potentially human craniotubular disorders.
Area of Science:
- Bone biology
- Craniomaxillofacial development
- Signaling pathways
Background:
- Wnt/β-catenin signaling is crucial for bone homeostasis.
- Dysregulation can lead to skeletal abnormalities.
- Craniomaxillofacial (CMF) bone development is complex.
Purpose of the Study:
- To investigate the role of Wnt/β-catenin signaling in CMF bone morphology and microstructure.
- To elucidate the cellular and molecular mechanisms underlying Wnt/β-catenin-induced CMF bone phenotypes.
Main Methods:
- Utilized transgenic mice (daβcatOt) with constitutively active β-catenin in Dmp1-expressing cells.
- Conducted molecular and cellular analyses at postnatal day 24 and beyond.
- Examined bone morphology, microstructure, and mineralization.
Main Results:
- daβcatOt mice showed midfacial truncations and progressive maxillary/mandibular hyperostosis.
- Increased osteoblast number and mineral apposition rate observed.
- Abnormal CMF bone matrix with excess osteoid and woven bone formation, alongside immature osteocytes.
Conclusions:
- Unrestrained Wnt/β-catenin signaling drives a ligand-independent positive feedback loop.
- This results in progressive CMF hyperostosis with architecturally abnormal, poorly mineralized bone.
- The phenotype resembles human craniotubular disorders, suggesting a shared pathway.
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