Causal associations between gut microbiota and synovitis-tenosynovitis: a two-sample Mendelian randomization study.

Area of Science:

• Microbiome research
• Inflammatory disease mechanisms
• Genetic epidemiology

Background:

• Gut microbiota dysbiosis is increasingly associated with synovitis and tenosynovitis.
• The causal relationship between gut microbiota and these conditions remains unclear.

Purpose of the Study:

• To investigate the causal role of gut microbiota in the development of synovitis and tenosynovitis.
• To identify specific bacterial taxa influencing the risk of these conditions.

Main Methods:

• A two-sample Mendelian randomization (MR) study utilizing large-scale genome-wide association study (GWAS) summary statistics.
• Inverse variance weighted (IVW) method as the primary analysis, supplemented by weighted median, simple mode, MR-Egger, and weighted mode methods.
• Sensitivity analyses including MR-Egger regression, Cochran's Q, funnel plots, and MR-PRESSO to assess pleiotropy and heterogeneity.

Main Results:

• Five bacterial genera (Gordonibacter, Paraprevotella, Lachnoclostridium, RuminococcaceaeUCG003, FamilyXIIIAD3011group) were negatively associated with synovitis and tenosynovitis risk.
• Two genera (Ruminococcustorquesgroup, Parabacteroides) were positively associated with the risk of these conditions.
• Sensitivity analyses confirmed the absence of significant pleiotropy or heterogeneity.

Conclusions:

• The gut microbiota plays a causal role in synovitis and tenosynovitis.
• Specific bacterial taxa have been identified as potential modulators of synovitis and tenosynovitis risk.
• These findings offer novel insights into the gut microbiota's contribution to the pathogenesis of these inflammatory conditions.