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Proteomic Characterization of Grade II Furcation Defects: A Discovery-Phase Study.

Georgios S Chatzopoulos1, Dimitra Sakellari1, Eleftherios G Kaklamanos1

  • 1Department of Preventive Dentistry, Periodontology and Implant Biology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.

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Researchers identified a 34-protein signature in gingival crevicular fluid (GCF) that accurately detects severe periodontitis-related furcation defects. This finding highlights distinct inflammatory profiles and neutrophil activation in advanced gum disease.

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Area of Science:

  • Periodontology
  • Proteomics
  • Biomarker Discovery

Background:

  • Periodontitis is a severe inflammatory disease affecting the gums and supporting bone.
  • Furcation defects represent advanced periodontal destruction.
  • Understanding the molecular profile of furcation defects is crucial for diagnosis and treatment.

Purpose of the Study:

  • To analyze the gingival crevicular fluid (GCF) proteome in patients with Grade II furcation defects.
  • To identify a protein signature that can differentiate furcation defects from healthy sites.
  • To investigate the inflammatory and neutrophil activation profiles associated with furcation defects.

Main Methods:

  • Proteomic analysis of GCF from 35 patients with Grade II furcation defects using the Olink Reveal platform.
  • Comparison of protein expression between periodontitis-affected sites and non-periodontitis sites.
  • Application of a machine-learning pipeline to prioritize differentially expressed proteins.

Main Results:

  • Identified 227 differentially expressed proteins between furcation defects and healthy sites.
  • Developed a 34-protein signature with high accuracy (AUC=0.887) in differentiating furcation defects.
  • Key proteins identified include GLIPR1, MME, and IRAG2, indicating severe inflammation and neutrophil activation.

Conclusions:

  • A distinct proteomic profile exists in the GCF of patients with Grade II furcation defects.
  • The 34-protein signature serves as a potential diagnostic biomarker for furcation defects.
  • The findings suggest a significant role of neutrophil activation in the pathogenesis of severe periodontitis.