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Changes in interleukin-6 levels during electroconvulsive therapy may reflect the therapeutic response in major depression.
Acta Psychiatrica Scandinavica 2017 January
OBJECTIVE: Interleukin-6 (IL-6) has been reported to be elevated in major depressive disorder (MDD) but decreased by antidepressive medication. IL-6 levels are markedly elevated both after epileptic seizures and single electroconvulsive therapy (ECT) session, but long-term changes in IL-6 levels after ECT have not been studied. The correlation between immediate and long-term changes in proinflammatory cytokines and outcome after ECT was investigated.
METHOD: Thirty patients suffering from MDD participated in the study. IL-6, interleukin-1β (IL-1β) and interleukin-1 receptor antagonist (IL-1RA) levels were examined at baseline and at 2 and 4 h after the first, fifth and the last ECT sessions. The response to ECT was measured with Montgomery-Åsberg Depression Rating Scale (MADRS).
RESULTS: ECT repeatedly caused an increase in IL-6 levels at the 4-h time point. However, the baseline IL-6 levels decreased among remitters, but not among non-remitters, towards the end of ECT. IL-1β levels were mostly below detectable level, and IL-1Ra levels did not change during and after ECT.
CONCLUSION: ECT has distinct acute and long-term effects on IL-6 levels. Interestingly, the long-term effect of ECT on IL-6 seems to correlate with outcome, providing further evidence of the mechanism of action of ECT and supporting the inflammation theory in MDD.
METHOD: Thirty patients suffering from MDD participated in the study. IL-6, interleukin-1β (IL-1β) and interleukin-1 receptor antagonist (IL-1RA) levels were examined at baseline and at 2 and 4 h after the first, fifth and the last ECT sessions. The response to ECT was measured with Montgomery-Åsberg Depression Rating Scale (MADRS).
RESULTS: ECT repeatedly caused an increase in IL-6 levels at the 4-h time point. However, the baseline IL-6 levels decreased among remitters, but not among non-remitters, towards the end of ECT. IL-1β levels were mostly below detectable level, and IL-1Ra levels did not change during and after ECT.
CONCLUSION: ECT has distinct acute and long-term effects on IL-6 levels. Interestingly, the long-term effect of ECT on IL-6 seems to correlate with outcome, providing further evidence of the mechanism of action of ECT and supporting the inflammation theory in MDD.
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