In fact, BDNF exerts potent pro-survival and functional effects in models of neurological diseases such as Parkinson’s (Howells et al., 2000; van der Kolk et al., 2015), Huntington’s (Zuccato et al., 2008; Jiang et al., 2013), and Alzheimer’s diseases (Holsinger et al., 2000; Michalski and Fahnestock, 2003; Peng et al., 2005; Faria et al., 2014), as well as depression and other psychiatric disorders (Karege et al., 2002; Aydemir et al., 2005; Gonul et al., 2005; Cunha et al., 2006). This evidence concerns the gene BDNF and nervous system disorder.