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Genes Critical for Developing Periodontitis: Lessons from Mouse Models.

Teun J de Vries1, Stefano Andreotta1, Bruno G Loos1

  • 1Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam, VU University Amsterdam, Amsterdam, Netherlands.

Frontiers in Immunology
|November 23, 2017
PubMed
Summary

Genetic mouse models reveal key genes crucial for maintaining periodontal health. Disruptions in immune cell function, pathogen recognition, or inflammation control lead to periodontitis, while certain gene knockouts offer protection.

Keywords:
bone resorptionchronic periodontitisimmune modulationknockout mousemouse modelsosteoclastperiodontitistransgenic mice

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Area of Science:

  • Immunology
  • Genetics
  • Periodontology

Background:

  • The exact causes of human periodontitis remain unclear.
  • Genetic mouse models are vital for understanding genes involved in periodontal tissue protection.

Purpose of the Study:

  • To review current knowledge on genes essential for maintaining a healthy periodontium in mice.
  • To identify genetic factors contributing to or protecting against periodontitis.

Main Methods:

  • Review of existing literature on gene functions in mouse models of periodontitis.
  • Analysis of phenotypes resulting from specific gene mutations.

Main Results:

  • Null mutations in genes for leukocyte recognition (e.g., Icam-1), pathogen handling (e.g., Tlr2), immune modulation (e.g., IL-10), and enzymes (e.g., Mmp8) result in periodontitis.
  • Mechanisms include impaired neutrophil function, poor antigen presentation, and excessive inflammation.
  • Protective genotypes (e.g., SCID, Tlr2/Tlr4 knockout) attenuate inflammation and osteoclast activity.

Conclusions:

  • Specific genes are indispensable for periodontal immune defense.
  • Dysregulation of immune responses, particularly Th1/Th17 pathways, drives periodontitis.
  • Targeting these genetic pathways may offer therapeutic strategies for periodontitis.