[Association of TPH2 gene polymorphism with response to antidepressant treatment among ethnic Han Chinese population].

Objective: To assess the association of TPH2 gene polymorphisms with the response or remission to selective serotonin reuptake inhibitors (SSRIs) drugs during treatment of major depressive disorder.
Methods: For 304 patients receiving SSRIs treatment for major depression disorder, 3 single nucleotide polymorphisms (SNPs) (rs1007023, rs1023990 and rs4570625) in the TPH2 gene were genotyped by MALDI-TOF mass spectrometry using a MassArray Analyzer 4 system. HAMD-17 was adopted as the primary rating tool to evaluate the severity of depression on the baseline and at the end of 1st, 2nd, 4th and 6th week of treatment.
Results: The frequency of GG genotype/G allele for rs4570625 differed significantly with the frequency of TT and GT genotypes/T allele between responders and non-responders (P=0.013 and 0.007, respectively). Genotypic and allelic frequencies of the other polymorphisms did not differ significantly between the two groups (P>0.05). No association of TPH2 gene polymorphism with remission was found with the 3 SNPs.
Conclusion: The polymorphisms of TPH2 gene may play an important role in response to antidepressant drug therapy.