BDNF and mood disorder: BDNF regulates neuronal growth and differentiation, synaptic plasticity, learning and memory, and is implicated in mood disorders and responses to aversive social experiences [Berton et al., 2006; Björkholm & Monteggia, 2016; Mitre, Mariga, & Chao, 2017; Rosas‐Vidal et al., 2018].