GSK3B (Beaulieu, 2012), BDNF (Lu et al., 2014), NGF (Cirulli and Alleva, 2009), NRG1 (Mei and Nave, 2014), HTR2C (Chagraoui et al., 2016; Palacios et al., 2017), and PIP4K2A (Wilcox and Hinchliffe, 2008) are genes that showed some importance in the study of the molecular etiology of psychiatric disorders (Table 1). Here, BDNF is linked to psychiatric disorder.