Rapid inflammation modulation and antidepressant efficacy of a low-dose ketamine infusion in treatment-resistant depression: A randomized, double-blind control study

Psychiatry Research
Mu-Hong ChenTung-Ping Su

Abstract

Increasing evidence supports the rapid antidepressant effect of a low-dose ketamine infusion in treatment-resistant depression (TRD). Proinflammatory cytokines play a crucial role in the pathophysiology of TRD. However, it is unknown whether the rapid antidepressant effect of ketamine is related to the rapid suppression of proinflammatory cytokines. Seventy-one patients with TRD were randomized into three groups according to the treatment received: 0.5 mg/kg ketamine, 0.2 mg/kg ketamine, and normal saline infusion. Proinflammatory markers, including C-reactive protein (CRP), interleukin (IL)-6, and tumor necrosis factor (TNF)-α were examined at baseline and at 40 min, 240 min, Day 3, and Day 7 postinfusion. Montgomery-Åsberg Depression Rating Scale (MADRS) was assessed for depressive symptoms across time. Log-transformed IL-6 and TNF-α levels differed significantly over time. The decrease in TNF-α between baseline and 40 min postinfusion was positively correlated with a decrease in MADRS scores across time in the 0.5 mg/kg ketamine group. This is the first clinical study to support a positive correlation between changes in cytokine levels after ketamine infusion and improvements in depressive symptoms with TRD. The rapid suppre...Continue Reading

Associated Clinical Trials

Citations

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