Treg cells as a protective factor for Hashimoto`s thyroiditis: a Mendelian randomization study

Area of Science:

• Immunology and Genetics
• Autoimmune Disease Research

Background:

• Hashimoto's thyroiditis (HT) is a prevalent autoimmune disorder affecting thyroid function.
• Regulatory T (Treg) cells are recognized for their role in immune suppression and have been linked to HT.
• Previous observational studies have limited understanding of the causal relationship between Treg cells and HT risk.

Purpose of the Study:

• To investigate the causal association between Treg cell biomarkers and Hashimoto's thyroiditis (HT) risk.
• To leverage large-scale genetic data for a comprehensive Mendelian randomization (MR) analysis.
• To provide genetic validation for the role of Treg cells in HT pathogenesis.

Main Methods:

• A comprehensive two-sample Mendelian randomization (MR) analysis was conducted.
• Utilized publicly available genetic data to assess 165 Treg cell signatures.
• Examined causal associations between Treg cell phenotypes and HT risk in European and Asian cohorts.

Main Results:

• In the European cohort, five Treg cell phenotypes were found to causally protect against HT risk.
• In the Asian cohort, four Treg cell phenotypes were identified as negatively correlated with HT risk.
• Specific Treg cell markers showed significant protective associations with HT in both cohorts.

Conclusions:

• This study provides genetic evidence for the causal relationship between Treg cells and Hashimoto's thyroiditis.
• The findings underscore the protective role of specific Treg cell subsets in preventing HT.
• Establishes a foundational basis for future research into Treg cell-targeted therapies for HT.