Inflammatory proteins mediate male erectile dysfunction via plasma metabolites

Area of Science:

• Genetics and Molecular Biology
• Metabolomics
• Urology

Background:

• Erectile dysfunction (ED) etiology is complex, with potential links to inflammatory proteins and plasma metabolites not fully elucidated.
• Previous research has yielded inconclusive results regarding the influence of these factors on ED development.

Purpose of the Study:

• To investigate the causal relationship between genetically predicted inflammatory proteins, plasma metabolites, and the incidence of erectile dysfunction (ED).
• To identify specific inflammatory proteins and plasma metabolites that contribute to the pathogenesis of ED.

Main Methods:

• Utilized Mendelian randomization (MR) analysis employing data from the MRC IEU OpenGWAS and FinnGen databases.
• Selected single nucleotide polymorphisms (SNPs) as instrumental variables to assess genetic associations between inflammatory proteins, plasma metabolites, and ED.
• Applied the inverse variance-weighted method for robust causal inference.

Main Results:

• Identified a significant causal relationship between 4 types of inflammatory proteins and 50 types of plasma metabolites with ED incidence.
• Discovered that fibroblast growth factor 5 (FGF5), interleukin-22 receptor subunit alpha-1 (IL22RA1), and protein S100-A12 significantly impact ED risk via plasma metabolite alterations.

Conclusions:

• Inflammatory proteins demonstrably influence erectile dysfunction (ED) through modulation of plasma metabolites.
• Findings suggest potential novel therapeutic strategies targeting these molecular pathways for ED management.