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Quantitative PCR-based Assay to Measure Sonic Hedgehog Signaling in Cellular Model of Ciliogenesis
Published on: January 31, 2025
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Primary cilia integrate hedgehog and Wnt signaling during tooth development
1Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, Stanford, CA 94305, USA.
Journal of Dental Research
|March 25, 2014
Summary
Genetic deletion of the motor protein Kif3a in dental mesenchyme arrests tooth development, causing missing incisors and enlarged molars. This highlights the primary cilium's role in integrating key signaling pathways for proper tooth formation.
Area of Science:
- Developmental Biology
- Cell Biology
- Genetics
Background:
- Ciliopathies often present with dental malformations, but the underlying mechanisms remain unclear.
- The role of primary cilia in coordinating signaling pathways during tooth development is not fully understood.
Purpose of the Study:
- To investigate the function of the motor protein Kif3a in dental mesenchyme during tooth development.
- To elucidate the role of primary cilia in integrating Hedgehog and Wnt signaling in odontogenesis.
Main Methods:
- Genetic deletion of Kif3a in dental mesenchyme using Wnt1(Cre+)Kif3a(fl/fl) mouse model.
- Analysis of tooth morphology, amelogenesis, and dentinogenesis.
- Assessment of Hedgehog and Wnt signaling pathway activity in dental tissues.
Main Results:
- Deletion of Kif3a in dental mesenchyme led to arrested odontogenesis, missing incisors, and enlarged molars.
- Loss of Kif3a disrupted Hedgehog signaling (decrease) and Wnt signaling (increase) in dental mesenchyme.
- Aberrant signaling from defective mesenchyme to dental epithelia caused abnormal invagination and expanded enamel organs.
Conclusions:
- The primary cilium is essential for integrating Hedgehog and Wnt signaling between dental epithelia and mesenchyme.
- Cilia-dependent signaling integration is critical for normal tooth development and preventing malformations.
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