Moreover, a reduction in BDNF was reported in the hippocampus of postmortem brain tissues of MDD and suicide victims (Dwivedi, 2012; Pandey et al., 2008) while injection of BDNF in the hippocampus reduces depression‐like behavior in rodents (Hoshaw et al., 2005). The gene discussed is BDNF; the disease is depressive symptom measurement.