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Robust Ligature-Induced Model of Murine Periodontitis for the Evaluation of Oral Neutrophils
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Using genetics to explore complement C5 as a druggable protein in periodontitis.

Zoheir Alayash1, Sebastian-Edgar Baumeister1, Birte Holtfreter2

  • 1Institute of Health Services Research in Dentistry, University of Münster, Münster, Germany.

Frontiers in Immunology
|October 23, 2024
PubMed
Summary

Inhibiting complement component C5 may reduce periodontitis risk. This study used genetic data to investigate C5 inhibition as a potential treatment for periodontitis, suggesting C5 inhibitors as a therapeutic option.

Keywords:
complement C5drug discoveryimmunomodulationinstrumental variable analysisperiodontitis

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Area of Science:

  • Immunology
  • Genetics
  • Periodontology

Background:

  • The complement system, particularly complement component C5 (C5), is implicated in periodontitis pathogenesis.
  • Targeting the C5a receptor to inhibit C5 activity has been proposed as a therapeutic strategy for periodontitis.

Purpose of the Study:

  • To investigate the therapeutic effect of genetically proxied inhibition of C5 on periodontitis risk using the drug target instrumental variable (IV) approach.

Main Methods:

  • Utilized 26 independent cis-single nucleotide polymorphisms (SNPs) near the C5 locus as IVs for plasma C5 levels.
  • Employed a genome-wide association study (GWAS) dataset of 35,559 individuals for plasma levels and a separate GWAS of 17,353 cases and 28,210 controls for periodontitis.
  • Performed inverse-variance weighted meta-analysis to combine Wald ratios.

Main Results:

  • Primary analysis indicated that C5 inhibition reduced periodontitis risk (Odds Ratio 0.89; 95% CI 0.80-0.98, p=0.022).
  • Secondary analysis suggested a potential causal role for interleukin-17 (IL-17) but was inconclusive for other biomarkers like IL-1β and TNF.

Conclusions:

  • Findings suggest that C5 inhibition may lower the risk of developing periodontitis.
  • C5 inhibitors are prioritized as a potential adjunctive therapeutic intervention for periodontitis.