Mendelian randomization rules out the causal relationship between serum lipids and cholecystitis

Area of Science:

• Genetics
• Epidemiology
• Metabolic Diseases

Background:

• The association between serum lipid levels and cholecystitis (gallbladder inflammation) requires further investigation.
• Understanding these relationships is crucial for public health and clinical practice.

Purpose of the Study:

• To investigate the potential causal effect of genetically determined serum lipid levels on the risk of developing cholecystitis.
• Utilizing Mendelian randomization to infer causality from observational data.

Main Methods:

• Mendelian randomization (MR) analysis using summary statistics from large genome-wide association studies (GWAS).
• Employed inverse-variance weighted (IVW), MR-Egger, and weighted median methods for robust causal inference.
• Assessed heterogeneity and horizontal pleiotropy using Cochrane's Q, MR-Egger intercept, and MR-PRESSO.

Main Results:

• A statistically significant, albeit minor, protective effect of genetically predicted serum low-density lipoprotein (LDL) cholesterol on cholecystitis was observed (p=0.008).
• No significant causal effects were found for total cholesterol (TC), triglycerides, or high-density lipoprotein (HDL) cholesterol on cholecystitis risk.

Conclusions:

• Serum LDL cholesterol may exert a slight protective influence on cholecystitis, though this effect might be susceptible to confounding.
• TC, triglycerides, and HDL cholesterol do not appear to have a causal role in cholecystitis development.
• The potential protective role of serum lipids in cholecystitis warrants further investigation.