The causal association between immune cells and gout: A bidirectional two-sample Mendelian randomization study.

Area of Science:

• Immunology
• Metabolic Disorders
• Genetic Epidemiology

Background:

• Gout is a metabolic disorder with growing associations with immune cells.
• The precise causal relationships between immune cells and gout remain largely undefined.
• Understanding these links is crucial for developing effective gout prevention and treatment strategies.

Purpose of the Study:

• To investigate the causal relationship between various immune cell phenotypes and gout.
• To identify specific immune cell markers that influence gout risk.
• To provide genetic evidence for immune cell involvement in gout pathogenesis.

Main Methods:

• Utilized two-sample Mendelian randomization (MR) analysis.
• Employed five distinct MR methods (MR-Egger, weighted median, inverse variance weighted, weighted mode, simple mode) for robust analysis.
• Conducted comprehensive sensitivity analyses to assess heterogeneity, pleiotropy, and result reliability.

Main Results:

• Identified three significant immunophenotypes associated with gout after FDR correction (PFDR <0.20).
• Two immunophenotypes, CD4-CD8-T cell absolute count and CD25 on IgD+CD24+B cells, were associated with an increased risk of gout.
• One immunophenotype, CD45RA+CD28- CD8+T cell %T cell, was associated with a decreased risk of gout.
• Sensitivity analyses confirmed the absence of significant heterogeneity and horizontal pleiotropy.

Conclusions:

• Established causal relationships between specific immune cell profiles and gout.
• The findings offer novel insights into the immunopathogenesis of gout.
• Suggests potential targets for future gout prevention and therapeutic interventions.