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USP34 regulates tooth root morphogenesis by stabilizing NFIC.

Shuang Jiang1, Rui Sheng1, Xingying Qi1

  • 1State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology, Sichuan University, Chengdu, China.

International Journal of Oral Science
|March 9, 2021
PubMed
Summary
This summary is machine-generated.

Ubiquitin-specific protease 34 (USP34) is crucial for tooth root development. Its absence causes short roots by impairing odontoblast differentiation and stabilizing NFIC.

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Area of Science:

  • Biochemistry
  • Developmental Biology
  • Genetics

Background:

  • Tooth root morphogenesis involves root elongation and dentinogenesis.
  • The role of ubiquitin-dependent protein degradation in tooth development is not well understood.

Purpose of the Study:

  • To investigate the role of ubiquitin-specific protease 34 (USP34) in tooth root formation.
  • To elucidate the molecular mechanisms underlying USP34's function in dental development.

Main Methods:

  • Gene deletion of Usp34 in dental mesenchymal cells.
  • Analysis of root morphology and dentin thickness.
  • Assessment of odontogenic differentiation in USP34-deficient dental pulp cells (DPCs).
  • Investigation of nuclear factor I/C (NFIC) expression and function.

Main Results:

  • Deletion of Usp34 resulted in a short root anomaly with truncated roots and thin root dentin.
  • USP34-deficient DPCs showed reduced odontogenic differentiation and downregulation of NFIC.
  • Overexpression of NFIC partially rescued the impaired odontogenic potential in DPCs.

Conclusions:

  • USP34 is essential for normal tooth root morphogenesis.
  • USP34-dependent deubiquitination is critical for stabilizing NFIC, thereby promoting odontoblast differentiation.
  • USP34 plays a pivotal role in regulating ubiquitin-dependent protein degradation during tooth development.