Potential correlation between chronic periodontitis and Parkinson's disease.

Area of Science:

• Genomics and Bioinformatics
• Neuroscience
• Immunology

Background:

• Chronic periodontitis (CP) and Parkinson's disease (PD) are prevalent conditions with complex etiologies.
• Emerging evidence suggests potential links between systemic inflammation and neurodegenerative disorders.
• Understanding shared molecular mechanisms could reveal novel therapeutic strategies.

Purpose of the Study:

• To identify shared hub genes, pathways, and transcription factors between CP and PD.
• To investigate the potential causal relationship between CP and PD.
• To explore novel therapeutic targets for both diseases.

Main Methods:

• Differential gene expression analysis of CP and PD datasets from the Gene Expression Omnibus (GEO) database.
• Construction and analysis of a protein-protein interaction (PPI) network to identify hub genes.
• Validation of hub genes using external datasets and Mendelian randomization (MR) to assess causality.

Main Results:

• Identified 1,211 differentially expressed genes (DEGs) in CP and 2,407 DEGs in PD.
• Screened four hub genes (FCGR3B, PRF1, IL18, CD33) and three transcription factors (HSF1, HSF2, HSF4).
• The natural killer (NK) cell-mediated toxic effects pathway was predominantly implicated, with MR suggesting a positive causal relationship between CP and PD risk.

Conclusions:

• CP and PD may share common pathophysiological mechanisms.
• A potential causal relationship exists between chronic periodontitis and the risk of developing Parkinson's disease.
• The findings offer novel insights and potential therapeutic targets for future research into CP and PD.