Neuroscience
March 17, 2011
H Kamiyama, M Matsumoto, S Otani et al.
The non-competitive N-methyl-D-aspartate NMDA receptor antagonist ketamine, a dissociative anesthetic capable of inducing analgesia, is known to have psychotomimetic actions, but the detailed mechanisms remain unclear because of its complex properties. The present study elucidated neural mechanisms of the effect of ketamine, at doses that exert psychotomimetic effects without anesthetic and...
The Journal of ECT
September 2010
Nagahisa Okamoto, Tetsuji Nakai, Kota Sakamoto et al.
Reports of the superiority of the antidepressant effect of ketamine during the conduct of electroconvulsive therapy (ECT) have been limited. We conducted an open-label trial of ketamine to determine whether ketamine as the anesthetic during ECT would provide a greater antidepressant effect than the antidepressant effect obtained with propofol. Between April 2006 and April 2007, 31 inpatients...
The Journal of Clinical Psychiatry
July 13, 2010
Nancy Diazgranados, Lobna Ibrahim, Nancy E. Brutsché et al.
563 citations
OBJECTIVE: Suicidal ideation is a medical emergency, especially when severe. Little research has been done on pharmacologic interventions that could address this problem. Ketamine, an N-methyl-D-asparate antagonist, has been reported to have antidepressant effects within hours. We examined the effects of a single dose of ketamine on suicidal ideation in subjects with treatment-resistant major...
Journal of Palliative Medicine
July 2010
Scott A Irwin, Alana Iglewicz
Depression is prevalent and undertreated in patients receiving hospice care. Standard antidepressants do not work rapidly or often enough to benefit most of these patients. Here, two cases are reported in which a single oral dose of ketamine provided rapid and moderately sustained symptom relief for both depression and anxiety. In addition, no adverse effects were noted. Further investigation...
Indian Journal of Psychiatry
April 1, 2010
T. Rao, Chittaranjan Andrade
Byline: T.S. Rao, Chittaranjan. Andrade Antidepressant drugs have traditionally addressed the monoamine triumvirate: serotonin, noradrenaline, and dopamine. There have been predominantly two mechanisms recruited in drug action - inhibition of monoamine reuptake and inhibition of intravesicular monoamine catabolism. Tianeptine, which increases the synaptic reuptake of serotonin, and mirtazapine,...
Biological Psychiatry
January 15, 2010
Marije Aan Het Rot, Katherine A. Collins, James W. Murrough et al.
A single subanesthetic (intravenous) IV dose of ketamine might have rapid but transient antidepressant effects in patients with treatment-resistant depression (TRD). Here we tested the tolerability, safety, and efficacy of repeated-dose open-label IV ketamine (six infusions over 12 days) in 10 medication-free symptomatic patients with TRD who had previously shown a meaningful antidepressant...
The Journal of Neuropsychiatry and Clinical Neurosciences
2010
Michael Messer, Irina V Haller, Pamela Larson et al.
Treatment-resistant depression often leads to increased morbidity and disability. The authors report the use of ketamine, a selective N-methyl-D-aspartate (NMDA) receptor antagonist, in two patients with treatment-resistant depression. Multiple ketamine treatments may provide an effective rapid antidepressant effect with prolonged benefit.
Pharmacopsychiatry
December 11, 2009
Georgios Paslakis, Morin Gilles, Andreas Meyer‐Lindenberg et al.
66 citations
We intended to assess safety, response to treatment and time to response of 1.25 mg/kg oral S-ketamine as add-on to standard antidepressants in four depressed patients. Two patients with melancholic depression responded early and stayed in remission, while two patients with distinct somatic symptoms, chronicity or atypical features did not respond. The limited number of patients does not allow...
The Journal of Clinical Psychiatry
September 8, 2009
Rodrigo Machado‐Vieira, Peixiong Yuan, Nancy E. Brutsché et al.
154 citations
OBJECTIVE: A model has been proposed to explain the pathophysiology of mood disorders based on decreased neurotrophin levels during mood episodes; treatment with antidepressants and mood stabilizers is associated with clinical improvement. This study investigated whether changes in brain-derived neurotrophic factor (BDNF) levels are associated with the initial antidepressant effects of...
Biological Psychiatry
July 9, 2009
R. Price, Matthew K. Nock, D. Charney et al.
Background Intravenous ketamine has shown rapid antidepressant effects in early trials, making it a potentially attractive candidate for depressed patients at imminent risk of suicide. The Implicit Association Test (IAT), a performance-based measure of association between two concepts, may have utility in suicide assessment. Methods Twenty-six patients with treatment-resistant depression were...