Epigenetic Mechanisms Linking Chronic Obstructive Pulmonary Disease and Atrial Fibrillation: A Multi-Omics Mendelian...

Area of Science:

• Genomics and Epigenetics
• Cardiovascular Disease Research
• Pulmonary Medicine

Background:

• Chronic obstructive pulmonary disease (COPD) and atrial fibrillation (AF) often coexist.
• The molecular links between COPD and AF are not well understood.

Purpose of the Study:

• To investigate if genetic susceptibility to COPD elevates AF risk.
• To identify epigenetic factors mediating the relationship between COPD and AF using multi-omics data.

Main Methods:

• Integrated genome-wide association studies (GWAS) for COPD and AF with epigenome-wide DNA methylation and gene expression data.
• Employed summary-data-based and two-sample Mendelian randomization, colocalization, and pleiotropy analyses.
• Utilized protein-protein interaction networks, pathway enrichment, and drug-prediction algorithms for functional context and therapeutic target identification.

Main Results:

• Genetic liability for COPD was significantly associated with increased AF risk (OR=1.156, p=0.018).
• Identified 109 COPD-related CpG sites linked to AF risk.
• Highlighted seven candidate genes, notably FES, with cross-omics evidence, implicating immune signaling and signal transduction pathways.

Conclusions:

• Findings suggest epigenetic regulation as a mechanism linking COPD to AF.
• Prioritized specific CpG sites, genes (e.g., FES), and potential drug targets for future research.
• Emphasized the need for validation in diverse populations due to study cohort limitations.