Uric acid level, gout and bone mineral density: A Mendelian randomization study.

Area of Science:

• Genetics
• Metabolic Health
• Bone Biology

Background:

• Elevated uric acid levels and gout are linked to various health issues.
• The relationship between uric acid, gout, and bone mineral density (BMD) requires clarification.
• Understanding this association is crucial for metabolic and bone health management.

Purpose of the Study:

• To investigate the potential causal relationship between uric acid levels and gout with bone mineral density (BMD).
• To determine if high uric acid or gout directly impacts bone health.

Main Methods:

• A two-sample Mendelian randomization (MR) analysis was conducted.
• Utilized genome-wide association study (GWAS) data for uric acid levels and gout from large European cohorts.
• Employed summary statistics from GWAS on lumbar spine and femur neck BMD.

Main Results:

• No causal association was found between uric acid levels or gout and lumbar spine BMD using inverse-variance weighted (IVW), MR-Egger, and weighted median methods.
• Similar null findings were observed for femur neck BMD.
• Instrumental variables included 6 SNPs for uric acid and 19 SNPs for gout.

Conclusions:

• Mendelian randomization analysis does not support a causal link between uric acid levels, gout, and bone mineral density (BMD) at the lumbar spine or femur neck.
• These findings suggest that observed associations may not be causal.