Repetitive enhancement of serum BDNF subsequent to continuation ECT

Area of Science:

• Neuroscience
• Psychiatry
• Molecular Biology

Background:

• Continuation electroconvulsive therapy (c-ECT) is effective in preventing depressive relapse.
• The precise mechanisms of c-ECT in humans, especially its impact on brain-derived neurotrophic factor (BDNF), remain unclear.

Purpose of the Study:

• To investigate the effect of c-ECT on serum BDNF levels in patients with unipolar or bipolar depression.
• To explore the relationship between c-ECT, BDNF concentrations, and clinical outcomes.

Main Methods:

• 13 patients with depression received 1-4 c-ECT sessions.
• Serum BDNF (sBDNF) levels and clinical assessments were measured before and after each c-ECT session.

Main Results:

• A significant increase in sBDNF was observed after each c-ECT treatment (c-ECT 1-3: P < 0.001; c-ECT 4: P = 0.018).
• No further sBDNF enhancement was associated with multiple c-ECT treatments.
• Clinical psychometric scores did not show significant changes post-treatment.

Conclusions:

• c-ECT administration leads to increased sBDNF concentrations, aligning with animal studies on neuroplasticity.
• Elevated sBDNF post-c-ECT may be related to sustained remission, despite stable clinical scores during treatment.