Causal links between brain multimodal features (morphometry, metabolomics, networks) and erectile dysfunction:...

Area of Science:

• Neuroscience
• Genetics
• Metabolomics

Background:

• Erectile dysfunction (ED) is a complex condition with potential neurological underpinnings.
• Integrating multimodal brain data (structural, functional, cerebrospinal fluid metabolomics) can illuminate ED's neural mechanisms.

Purpose of the Study:

• To investigate the causal relationships between brain phenotypes and ED using Mendelian randomization.
• To identify specific brain structural, functional, and metabolic factors associated with ED risk.

Main Methods:

• Two-sample Mendelian randomization analysis was employed.
• Phenotypes included 83 whole-brain morphological, 191 resting-state fMRI, and 338 cerebrospinal fluid metabolite measures.
• Statistical significance was determined by a p-value < 0.05.

Main Results:

• Reduced accumbens volumes and enlarged pars opercularis/putamen volumes were linked to increased ED risk.
• Altered functional connectivity in default/executive and motor/subcortical-cerebellum networks showed differential associations with ED risk.
• Specific cerebrospinal fluid metabolites, such as elevated 4-Methylcatechol sulfate and lower cortisone, were causally associated with ED risk.

Conclusions:

• Four morphological, two functional connectivity, and nine metabolic causal relationships with ED were identified.
• These findings enhance the understanding of ED's neurobiological basis.
• The identified relationships suggest potential novel therapeutic targets for ED.