“…For example, the levels of brain-derived neurotrophic factor (BDNF) were reduced in both the postmortem brain and circulation in patients with MDD (Dwivedi et al, 2003;Karege et al, 2005;Brunoni et al, 2008;Sen et al, 2008). It has also been found that BDNF, nerve growth factor (NGF), neurotrophin-3 (NT-3), and vascular endothelial growth factor (VEGF) are reduced in the rat models of MDD (Ueyama et al, 1997;Bergstrom et al, 2008;Mao et al, Supplemental digital content is available for this article. It has also been found that BDNF, nerve growth factor (NGF), neurotrophin-3 (NT-3), and vascular endothelial growth factor (VEGF) are reduced in the rat models of MDD (Ueyama et al, 1997;Bergstrom et al, 2008;Mao et al, Supplemental digital content is available for this article.…”