Association between vitamin B6 levels and rheumatoid arthritis: a two-sample Mendelian randomization study

Area of Science:

• Genetics
• Nutritional Science
• Rheumatology

Background:

• Micronutrients are vital for rheumatoid arthritis (RA) management, with altered levels potentially exacerbating the condition.
• Previous observational studies suggest correlations between RA and micronutrients, but causal links remain unclear.
• This research investigates the genetic basis of causal relationships between 15 key micronutrients and RA.

Purpose of the Study:

• To determine the causal genetic relationships between 15 specific micronutrients and rheumatoid arthritis (RA).
• To identify specific micronutrients that may causally influence the development or progression of RA.
• To provide a foundation for novel diagnostic and therapeutic approaches in RA management.

Main Methods:

• Employed two-sample Mendelian randomization (MR) using summary statistics from European populations.
• Utilized GWAS data for exposure factors and the FinnGen database for RA outcome data.
• Applied five MR analysis methods, including inverse variance weighted (IVW), with rigorous sensitivity and pleiotropy analyses.

Main Results:

• Mendelian randomization analysis identified a significant causal relationship between vitamin B6 and rheumatoid arthritis (RA).
• The inverse variance weighted (IVW) analysis indicated that higher vitamin B6 levels are associated with an increased risk of RA (OR: 1.766, p: 0.029).
• Sensitivity analyses confirmed the robustness and reliability of the identified association between vitamin B6 and RA.

Conclusions:

• Established a causal link between vitamin B6 and rheumatoid arthritis, positioning vitamin B6 as a risk factor for RA.
• This finding offers potential for improved RA diagnosis and supplementary treatment strategies.
• Provides a basis for future research into the underlying mechanisms and development of targeted therapies for RA.