Protease-activated receptor-2 (PAR(2)) in human periodontitis

Area of Science:

• Oral biology
• Immunology
• Periodontology

Background:

• Protease-activated receptor-2 (PAR(2)) role in human periodontal disease remains unclear.
• Chronic periodontitis involves complex inflammatory processes and microbial challenges.

Purpose of the Study:

• Investigate PAR(2) mRNA expression in chronic periodontitis.
• Determine the relationship between PAR(2) expression and its potential activators.
• Assess the impact of periodontal treatment on PAR(2) expression.

Main Methods:

• Collected microbiological and gingival crevicular fluid samples from chronic periodontitis patients and controls.
• Evaluated the presence of neutrophil serine proteinase 3 (P3) and Porphyromonas gingivalis.
• Quantified PAR(2) mRNA expression and levels of inflammatory cytokines (IL-1α, IL-6, IL-8, TNF-α).

Main Results:

• Significantly higher PAR(2) mRNA expression in chronic periodontitis patients compared to controls (p < 0.001).
• Elevated levels of IL-1α, IL-6, IL-8, TNF-α, proteolytic activity, P. gingivalis, and P3 mRNA in periodontitis patients (p < 0.05).
• PAR(2) mRNA expression decreased significantly after periodontal treatment (p = 0.0006).

Conclusions:

• PAR(2) mRNA expression and its activators are elevated in human chronic periodontitis.
• Findings suggest a potential role for PAR(2) in mediating periodontal inflammation.
• Periodontal treatment may reduce PAR(2) expression, indicating its involvement in the disease process.