Abstract:
BACKGROUND:Because researchers have reported that antidepressants increase the expression of brain-derived neurotrophic factor (BDNF) in the rat hippocampus, we investigated whether serum BDNF levels may be used as a putative biological marker for major depressive disorders (MDD). METHODS:We measured serum BDNF in the following three groups: antidepressant-naive patients with MDD (n = 16), antidepressant-treated patients with MDD (n = 17), and normal control subjects (n = 50). Patients were evaluated using the Hamilton Rating Scale for Depression (HAM-D). Serum BDNF was assayed with the sandwich ELISA method. RESULTS:We found that serum BDNF was significantly lower in the antidepressant-naive group (mean, 17.6 ng/mL; SD, 9.6) than in the treated (mean, 30.6 ng/mL; SD, 12.3; p =.001) or in the control group (mean, 27.7 ng/mL; SD, 11.4; p =.002). There was a significant negative correlation (r = -.350, z = -2.003, p =.045) between serum BDNF and HAM-D scores in all patients. In a preliminary examination, reduced BDNF values of three drug-naive patients recovered to basal levels after antidepressant treatment. CONCLUSIONS:Our study suggests that low BDNF levels may play a pivotal role in the pathophysiology of MDD and that antidepressants may increase BDNF in depressed patients.
journal_name
Biol Psychiatryjournal_title
Biological psychiatryauthors
Shimizu E,Hashimoto K,Okamura N,Koike K,Komatsu N,Kumakiri C,Nakazato M,Watanabe H,Shinoda N,Okada S,Iyo Mdoi
10.1016/s0006-3223(03)00181-1subject
Has Abstractpub_date
2003-07-01 00:00:00pages
70-5issue
1eissn
0006-3223issn
1873-2402pii
S0006322303001811journal_volume
54pub_type
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