Mendelian Randomization Reveals Genetic Associations Between Immune Traits and Urethral Stricture.

Area of Science:

• Immunology
• Urology
• Genetics

Background:

• Limited research exists on the association between immune traits and urethral stricture.
• The diverse subtypes of immune cells complicate understanding their role in urethral stricture.

Purpose of the Study:

• To investigate the potential causal relationship between immune cells and urethral stricture.
• To utilize Mendelian randomization (MR) to analyze this association.

Main Methods:

• Employed the inverse-variance weighted (IVW) approach for Mendelian randomization analysis.
• Utilized MR-Egger and weighted median (WM) methods for supplementary analysis.
• Conducted sensitivity analyses including Egger intercept, Cochran's Q test, MR-PRESSO, and leave-one-out tests to ensure robustness.

Main Results:

• Identified 37 immune phenotypes with suggestive causal relationships to urethral stricture.
• Specific immune cell types implicated include B cells, classical dendritic cells, myeloid cells, monocytes, TBNK cells, Treg cells, and T cell maturation stages.
• Sensitivity analyses confirmed the absence of heterogeneity and pleiotropy.

Conclusions:

• The study provides evidence supporting a potential causal link between immune cells and urethral stricture.
• These findings may inform future strategies for the management and treatment of urethral stricture.