[No authors listed]
Trace amines are putative regulatory elements in the brain whose activity may be relevant to the pathophysiology of depressive episodes. TAAR6 is an orphan receptor probably associated with trace amines. Its genetic variations have been associated with bipolar and schizophrenic disorders. In this study we investigated for the first time the possible association between a set of TAAR6 genetic variations (rs7452939; rs4305745; rs6903874; rs6937506; and rs8192625) with clinical features of depression including antidepressant treatment response in a sample of 187 depressive patients all of Korean origins. rs6903874 T/T carriers had a statistically significant better improvement, and rs6937506 C/C genotype was found to be more frequent in patients without a history of suicide attempt (incomplete or unsuccessful suicide). Haplotype analyses confirmed the association with suicide attempt behavior being haplotype G-T at SNPs rs7452939 and rs6937506 at risk of suicide. These results suggest a possible role of TAAR6 in antidepressant response and suicide behavior in patients with depressive disorder. Heterogeneity of treatment, possible stratification bias not controlled by the statistical analyses, and the risk of false-positive finding mandate further analysis in this direction.
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