Common Variation in the DIO2 Gene Predicts Baseline Psychological Well-Being and Response to Combination Thyroxine Plus Triiodothyronine Therapy in Hypothyroid Patients

Introduction: Animal studies suggest that up to 80% of intracellular T3 in the brain is derived from circulating T4 by local deiodination. We hypothesized that in patients on T4 common variants in the deiodinase genes might influence baseline psychological well-being and any improvement on combin…