Impact of thyroid function on coagulation and venous thromboembolism: a two-sample mendelian randomization study.

Area of Science:

• Endocrinology
• Genetics
• Thrombosis Research

Background:

• Conflicting observational data link thyroid function, coagulation, and venous thromboembolism (VTE).
• Causal relationships remain unclear, necessitating genetic investigation.

Purpose of the Study:

• To investigate the causal effects of thyroid function on coagulation and VTE using a genetic approach.
• To leverage Mendelian randomization to assess thyroid function's impact on nine coagulation factors and VTE risk.

Main Methods:

• Two-sample Mendelian randomization analysis utilizing genome-wide association study summary statistics from a European population.
• Examined associations between genetically predicted thyroid function and nine coagulation factors (e.g., Antithrombin-III, Protein C).
• Employed inverse variance weighting and conducted sensitivity analyses to ensure result robustness.

Main Results:

• No significant genetic causal effect of thyroid function on VTE was identified.
• Hyperthyroidism showed a suggestive genetic association with decreased levels of Antithrombin-III and Protein C.
• No other significant associations were found between thyroid function parameters and coagulation factors.

Conclusions:

• Suggestive genetic evidence indicates hyperthyroidism may causally reduce anticoagulant factors (Antithrombin-III, Protein C).
• The clinical implication of this genetic finding on hypercoagulable states and VTE risk in hyperthyroid individuals requires further investigation.