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It is well established that brain-derived neurotrophic factor (BDNF) signaling pathway plays a key role in the pathophysiology of major depressive disorder (MDD) and in therapeutic mechanisms of antidepressants. We aim to identify genetic vairiants related to MDD susceptibility and antidepressant therapeutic response by using gene-based association analysis with genes related to the neurotrophic pathway. The present study investigated the role of genetic variants in the 10 neurotrophic-related genes ( BDNF ,  NGFR ,  NTRK2 ,  MTOR ,  VEGFA ,  S100A10 ,  SERPINE1 ,  ARHGAP33 ,  GSK3B ,  CREB1 ) in MDD susceptibility through a case-control (455 MDD patients and 2,998 healthy controls) study and in antidepressant efficacy (n = 455). Measures of antidepressant therapeutic efficacy were evaluated using the 21-item Hamilton Rating Scale for Depression. Our single-marker and gene-based analyses with ten genes related to the neurotrophic pathway identified 6 polymorphisms that reached a significant level ( p -value < 5.0 × 10 −3 ) in both meta- and mega-analyses in antidepressant therapeutic response. One polymorphism was mapped to  BDNF  and 5 other polymorphisms were mapped to  VEGFA . For case-control association study, we found that all of these reported polymorphisms and genes did not reach a suggestive level. The present study supported a role of  BDNF  and  VEGFA  variants in MDD therapeutic response.

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Gene-based analysis of genes related to neurotrophic pathway suggests association of BDNF and VEGFA with antidepressant treatment-response in depressed patients