Exploration of the shared gene signatures and comorbidity mechanisms of primary aldosteronism and atrial fibrillation.

Background: Primary aldosteronism (PA) is a prevalent cause of endocrine hypertension characterized by an excess of aldosterone that can induce proinflammatory, prooxidant and profibrotic effects on the heart. Emerging evidence indicates a heightened incidence of atrial fibrillation (AF) in patients with PA, suggesting a significant association between the two conditions. However, the underlying mechanisms remain unclear. The purpose of this study was to investigate the molecular networks associated with the development of both PA and AF. Methods: Datasets were obtained from the Gene Expression Omnibus database. Hub genes were identified by enrichment and protein-protein interaction analysis. These hub genes were subsequently validated via two independent external datasets: GSE60042 (PA microarray dataset) and GSE41177 (AF microarray dataset). Following the identification of shared genes, quantitative real-time polymerase chain reaction (qPCR) was employed to verify the reliability of the dataset and to further confirm the presence of shared genes in clinical samples. Results: The results of the common gene analysis revealed that immune and inflammatory responses may be shared features in the pathophysiology of PA and AF. One hub gene, specifically tumor necrosis factor superfamily member 10 (TNFSF10), was identified through various analyses and subsequently validated via qPCR. Compared with that in healthy controls, the expression level of TNFSF10 was lower in PA patients with AF. Conclusion: Our findings indicate that TNFSF10 may play a role in the pathophysiology of AF complications associated with PA conditions, suggesting that it could serve as a potential target for the diagnosis or treatment of PA patients complicated with AF.