The association study of CLOCK gene polymorphisms with antidepressant effect in Chinese with major depressive disorder.

Aim: Major depressive disorder (MDD) is a common psychiatric disorder with a complicated pathogenesis and genetic predisposition. The objective of this article is to explore the relationship between the four SNPs of circadian locomotor output cycles kaput (CLOCK) gene (rs11932595, rs12504300, rs3805148, rs534654) and the efficacy of antidepressants. Materials & methods: This study enrolled a total of 600 patients, who met the DSM-V diagnostic criteria for MDD. All subjects were treated with single selective serotonin reuptake inhibitors. The HAMD and adverse reaction scale (TESS/UKU) were used to assess the efficacy of antidepressants and adverse effects. The PCR and DNA sequencing analysis were used to genotype loci of CLOCK gene.

Results: The antidepressants efficacy of subjects with rs11932595 AA genotype was significantly higher than those with GG+GA genotypes (p = 0.035). But this p-value was not significant after false discovery rate (FDR) adjustment.

Conclusion: The variant of CLOCK gene may be associated with the efficacy of selective serotonin reuptake inhibitors in Chinese Han MDD patients.