IFT80 is required for stem cell proliferation, differentiation, and odontoblast polarization during tooth development
Xue Yuan1, Xu Cao2, Shuying Yang3,4
1Department of Oral Biology, School of Dental Medicine University of Buffalo, State University of New York, Buffalo, NY, USA.
Cell Death & Disease
|January 27, 2019
Summary
Intraflagellar transport 80 (IFT80) is crucial for dental pulp stem cell properties and tooth development. Loss of IFT80 impairs stem cell proliferation and differentiation, affecting tooth formation and eruption.
Area of Science:
- Cell Biology
- Developmental Biology
- Stem Cell Biology
Background:
- Primary cilia and intraflagellar transport (IFT) proteins are vital for tissue development and homeostasis.
- The specific role of IFT proteins in regulating stem cell properties during tooth development is not well understood.
Purpose of the Study:
- To investigate the role of IFT80 in dental pulp stem cells (DPSCs) and its impact on tooth development.
- To elucidate the molecular mechanisms by which IFT80 influences DPSC properties and tooth formation.
Main Methods:
- Utilized a mouse model with IFT80 deletion in the odontoblast lineage.
- Analyzed DPSC proliferation, differentiation, and polarization.
- Investigated the involvement of hedgehog (Hh) and fibroblast growth factor 2 (FGF2) signaling pathways.
Main Results:
- IFT80 is expressed in DPSCs and is essential for maintaining their properties.
- IFT80 deficiency in odontoblast lineage led to impaired molar root development and delayed incisor eruption.
- Reduced DPSC proliferation and differentiation, along with disrupted odontoblast polarization, were observed.
- Impaired odontoblast differentiation was linked to disrupted Hh signaling.
- Decreased DPSC proliferation resulted from impaired FGF2 signaling via the FGF2-FGFR1-PI3K-AKT pathway.
Conclusions:
- IFT80 plays a critical role in tooth development by regulating DPSC proliferation, differentiation, and odontoblast polarization.
- IFT80 influences tooth development through Hh and FGF/AKT signaling pathways.
- IFT proteins represent potential therapeutic targets for dental and other tissue regeneration.
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