# Genetic and causal relationship between chronic gastrointestinal diseases and erectile dysfunction: a Mendelian randomization study

## TL;DR

This study finds a causal link between chronic gastrointestinal diseases like IBD and CD and erectile dysfunction using genetic data.

## Contribution

The study provides causal evidence using Mendelian randomization and genetic correlation methods.

## Key findings

- IBD and Crohn's disease have significant causal relationships with erectile dysfunction.
- Genetic correlations were found between Crohn's disease, ulcerative colitis, and liver cirrhosis with erectile dysfunction.
- Colorectal cancer may also have a potential causal effect on erectile dysfunction.

## Abstract

Studies based on observations have indicated potential associations between chronic gastrointestinal diseases and an increased risk of erectile dysfunction (ED). However, the causality of these connections remains ambiguous.

Summary data for chronic gastrointestinal diseases were extracted from public data. Summary data on ED were extracted from three distinct sources. The genetic correlations between chronic gastrointestinal diseases and ED were explored using linkage disequilibrium score regression (LDSC). The causal associations between chronic gastrointestinal diseases and ED were evaluated using Mendelian randomization (MR) analysis, followed by a meta-analysis to determine the ultimate causal effect.

The LDSC results suggested significant genetic correlations between Crohn's disease (CD) and ED. Inflammatory bowel disease (IBD), ulcerative colitis (UC), and liver cirrhosis (LC) were found to have potential genetic correlations with ED. The combined multiple MR results indicate that IBD and CD have significant causal relationships with ED, while colorectal cancer (CRC) may have a potential causal effect on ED.

This research provided evidence supporting a causal association between IBD, CD, CRC, and ED. The impact of chronic gastrointestinal diseases on ED warrants greater attention in clinical practice.