Abstract
Ketamine, an N-methyl-D-aspartate (NMDA) receptor antagonist, has well-described rapid antidepressant effects in clinical studies of individuals with treatment-resistant major depressive disorder (MDD). Preclinical studies investigating the effects of ketamine on brain-derived neurotrophic factor (BDNF) and on sleep slow wave activity (SWA) support its use as a prototype for investigating the neuroplastic mechanisms presumably involved in the mechanism of rapidly acting antidepressants. This review discusses human EEG slow wave sleep parameters and plasma BDNF as central and peripheral surrogate markers of plasticity, and their use in assessing ketamine’s effects. Acutely, ketamine elevates BDNF levels, as well as early night SWA and high-amplitude slow waves; each of these measures correlates with change in mood in depressed patients who respond to ketamine. The slow wave effects are limited to the first night post-infusion, suggesting that their increase is part of an early cascade of events triggering improved mood. Increased total sleep and decreased waking occur during the first and second night post infusion, suggesting that these measures are associated with the enduring treatment response observed with ketamine.
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References
Papers of particular interest, published recently, have been highlighted as: • Of importance •• Of major importance
Rush AJ, Trivedi MH, Stewart JW, Nierenberg AA, Fava M, Kurian BT, et al. Combining medications to enhance depression outcomes (CO-MED): acute and long-term outcomes of a single-blind randomized study. Am J Psychiatry. 2011;168:689–701.
Rush AJ, Trivedi MH, Wisniewski SR, Nierenberg AA, Stewart JW, Warden D, et al. Acute and longer-term outcomes in depressed outpatients requiring one or several treatment steps: a STAR*D report. Am J Psychiatry. 2006;163:1905–17.
Trivedi MH, Rush AJ, Wisniewski SR, Nierenberg AA, Warden D, Ritz L, et al. Evaluation of outcomes with citalopram for depression using measurement-based care in STAR*D: implications for clinical practice. Am J Psychiatry. 2006;163:28–40.
Berman RM, Cappiello A, Anand A, Oren DA, Heninger GR, Charney DS, et al. Antidepressant effects of ketamine in depressed patients. Biol Psychiatry. 2000;47:351–4.
Furey ML, Drevets WC. Antidepressant efficacy of the antimuscarinic drug scopolamine: a randomized, placebo-controlled clinical trial. Arch Gen Psychiatry. 2006;63:1121–9.
Hemmeter UM, Hemmeter-Spernal J, Krieg JC. Sleep deprivation in depression. Expert Rev Neurother. 2010;10:1101–15.
Husain MM, Rush AJ, Fink M, Knapp R, Petrides G, Rummans T, et al. Speed of response and remission in major depressive disorder with acute electroconvulsive therapy (ECT): a Consortium for Research in ECT (CORE) report. J Clin Psychiatry. 2004;65:485–91.
Pagnin D, de Queiroz V, Pini S, Cassano GB. Efficacy of ECT in depression: a meta-analytic review. J ECT. 2004;20:13–20.
Faraguna U, Vyazovskiy VV, Nelson AB, Tononi G, Cirelli C. A causal role for brain-derived neurotrophic factor in the homeostatic regulation of sleep. J Neurosci. 2008;28:4088–95.
Diazgranados N, Ibrahim L, Brutsche NE, Newberg A, Kronstein P, Khalife S, et al. A randomized add-on trial of an N-methyl-D-aspartate antagonist in treatment-resistant bipolar depression. Arch Gen Psychiatry. 2010;67:793–802.
Zarate Jr CA, Singh JB, Carlson PJ, Brutsche NE, Ameli R, Luckenbaugh DA, et al. A randomized trial of an N-methyl-D-aspartate antagonist in treatment-resistant major depression. Arch Gen Psychiatry. 2006;63:856–64.
Machado-Vieira R, Ibrahim L, Henter ID, Zarate Jr CA. Novel glutamatergic agents for major depressive disorder and bipolar disorder. Pharmacol, Biochem Behav. 2012;100:678–87.
Maeng S, Zarate Jr CA. The role of glutamate in mood disorders: results from the ketamine in major depression study and the presumed cellular mechanism underlying its antidepressant effects. Curr Psychiatry Rep. 2007;9:467–74.
Yilmaz A, Schulz D, Aksoy A, Canbeyli R. Prolonged effect of an anesthetic dose of ketamine on behavioral despair. Pharmacol, Biochem Behav. 2002;71:341–4.
Moghaddam B, Adams B, Verma A, Daly D. Activation of glutamatergic neurotransmission by ketamine: a novel step in the pathway from NMDA receptor blockade to dopaminergic and cognitive disruptions associated with the prefrontal cortex. J Neurosci. 1997;17:2921–7.
•• Li N, Lee B, Liu RJ, Banasr M, Dwyer JM, Iwata M, et al. mTOR-dependent synapse formation underlies the rapid antidepressant effects of NMDA antagonists. Science. 2010;329:959–64. This study shows that in rats, ketamine rapidly activates the mTOR pathway, thereby increasing synaptic signaling proteins, spine density, and function. Blocking the mTOR pathway negated these effects as well as ketamine’s antidepressant-like effects.
• Duman RS, Aghajanian GK. Synaptic dysfunction in depression: potential therapeutic targets. Science. 2012;338:68–72. This review summarizes preclinical work showing that ketamine rapidly induces synaptogenesis and reverses synaptic deficits caused by chronic stress.
Chen ZY, Patel PD, Sant G, Meng CX, Teng KK, Hempstead BL, et al. Variant brain-derived neurotrophic factor (BDNF) (Met66) alters the intracellular trafficking and activity-dependent secretion of wild-type BDNF in neurosecretory cells and cortical neurons. J Neurosci. 2004;24:4401–11.
Egan MF, Kojima M, Callicott JH, Goldberg TE, Kolachana BS, Bertolino A, et al. The BDNF val66met polymorphism affects activity-dependent secretion of BDNF and human memory and hippocampal function. Cell. 2003;112:257–69.
Li N, Liu RJ, Dwyer JM, Banasr M, Lee B, Son H, et al. Glutamate N-methyl-D-aspartate receptor antagonists rapidly reverse behavioral and synaptic deficits caused by chronic stress exposure. Biol Psychiatry. 2011;69:754–61.
•• Autry AE, Adachi M, Nosyreva E, Na ES, Los MF, Cheng PF, et al. NMDA receptor blockade at rest triggers rapid behavioural antidepressant responses. Nature. 2011;475:91–5. This study shows that NMDA antagonists cause fast-acting antidepressant-like effects in mouse models and that such effects depend on rapid synthesis of BDNF. Spontaneous neurotransmission effects on protein synthesis are viable targets of fast-acting antidepressants.
Kavalali ET, Monteggia LM. Synaptic mechanisms underlying rapid antidepressant action of ketamine. Am J Psychiatry. 2012;169:1150–6.
Huber R, Ghilardi MF, Massimini M, Tononi G. Local sleep and learning. Nature. 2004;430:78–81.
Huber R, Ghilardi MF, Massimini M, Ferrarelli F, Riedner BA, Peterson MJ, et al. Arm immobilization causes cortical plastic changes and locally decreases sleep slow wave activity. Nat Neurosci. 2006;9:1169–76.
Esser SK, Hill SL, Tononi G. Sleep homeostasis and cortical synchronization: I. Modeling the effects of synaptic strength on sleep slow waves. Sleep. 2007;30:1617–30.
Vyazovskiy VV, Riedner BA, Cirelli C, Tononi G. Sleep homeostasis and cortical synchronization: II. A local field potential study of sleep slow waves in the rat. Sleep. 2007;30:1631–42.
Vyazovskiy VV, Cirelli C, Pfister-Genskow M, Faraguna U, Tononi G. Molecular and electrophysiological evidence for net synaptic potentiation in wake and depression in sleep. Nat Neurosci. 2008;11:200–8.
Huber R, Tononi G, Cirelli C. Exploratory behavior, cortical BDNF expression, and sleep homeostasis. Sleep. 2007;30:129–39.
Aeschbach D, Cutler AJ, Ronda JM. A role for non-rapid-eye-movement sleep homeostasis in perceptual learning. J Neurosci. 2008;28:2766–72.
Bachmann V, Klein C, Bodenmann S, Schafer N, Berger W, Brugger P, et al. The BDNF Val66Met polymorphism modulates sleep intensity: EEG frequency- and state-specificity. Sleep. 2012;35:335–44.
Laje G, Lally N, Mathews D, Brutsche N, Chemerinski A, Akula N, et al. Brain-derived neurotrophic factor Val66Met polymorphism and antidepressant efficacy of ketamine in depressed patients. Biol Psychiatry. 2012;72:e27–8.
Ostenfeld I. Abstinence from night sleep as a treatment for endogenous depressions. The earliest observations in a Danish mental hospital (1954) and the analysis of the causal mechanism. Dan Med Bull. 1986;33:45–9.
Schulte W. Sequelae of sleep deprivation. Medizinische Klinik (Munich). 1959;54:969–73.
Borbely AA, Wirz-Justice A. Sleep, sleep deprivation and depression. A hypothesis derived from a model of sleep regulation. Hum Neurobiol. 1982;1:205–10.
Tononi G, Cirelli C. Sleep function and synaptic homeostasis. Sleep Med Rev. 2006;10:49–62.
Borbely AA. A two process model of sleep regulation. Hum Neurobiol. 1982;1:195–204.
Gorgulu Y, Caliyurt O. Rapid antidepressant effects of sleep deprivation therapy correlates with serum BDNF changes in major depression. Brain Res Bull. 2009;80:158–62.
Ibrahim L, Duncan W, Luckenbaugh DA, Yuan P, Machado-Vieira R, Zarate Jr CA. Rapid antidepressant changes with sleep deprivation in major depressive disorder are associated with changes in vascular endothelial growth factor (VEGF): a pilot study. Brain Res Bull. 2011;86:129–33.
Baxter Jr LR. Can lithium carbonate prolong the antidepressant effect of sleep deprivation? Arch Gen Psychiatry. 1985;42:635.
Bunney BG, Bunney WE. Rapid-acting antidepressant strategies: mechanisms of action. Int J Neuropsychopharmacol. 2011;1-19.
Wu JC, Kelsoe JR, Schachat C, Bunney BG, DeModena A, Golshan S, et al. Rapid and sustained antidepressant response with sleep deprivation and chronotherapy in bipolar disorder. Biol Psychiatry. 2009;66:298–301.
aan het Rot M, Collins KA, Murrough JW, Perez AM, Reich DL, Charney DS, et al. Safety and efficacy of repeated-dose intravenous ketamine for treatment-resistant depression. Biol Psychiatry. 2010;67:139–45.
Murrough JW, Perez AM, Pillemer S, Stern J, Parides MK, Aan Het Rot M, et al. Rapid and longer-term antidepressant effects of repeated ketamine infusions in treatment-resistant major depression. Biol Psychiatry. 2013;74:250–256.
Rasmussen KG, Lineberry TW, Galardy CW, Kung S, Lapid MI, Palmer BA, et al. Serial infusions of low-dose ketamine for major depression. J Psychopharmacol. 2013;27:444–50.
Ibrahim L, Diazgranados N, Franco-Chaves J, Brutsche N, Henter ID, Kronstein P, et al. Course of improvement in depressive symptoms to a single intravenous infusion of ketamine vs add-on riluzole: results from a 4-week, double-blind, placebo-controlled study. Neuropsychopharmacology. 2012;37:1526–33.
Mathew SJ, Murrough JW, aan het Rot M, Collins KA, Reich DL, Charney DS. Riluzole for relapse prevention following intravenous ketamine in treatment-resistant depression: a pilot randomized, placebo-controlled continuation trial. Int J Neuropsychopharmacol. 2010;13:71–82.
Hemmeter U, Bischof R, Hatzinger M, Seifritz E, Holsboer-Trachsler E. Microsleep during partial sleep deprivation in depression. Biol Psychiatry. 1998;43:829–39.
Van Bemmel A, van den Hoofdakker R. Maintenance of therapeutic effects of total sleep deprivation by limitation of subsequent sleep. A pilot study. Acta Psychiatr Scand. 1981;63:453–62.
Hefti K, Holst SC, Sovago J, Bachmann V, Buck A, Ametamey SM, et al. Increased metabotropic glutamate receptor subtype 5 availability in human brain after one night without sleep. Biol Psychiatry. 2013;73:161–8.
John J, Ramanathan L, Siegel JM. Rapid changes in glutamate levels in the posterior hypothalamus across sleep-wake states in freely behaving rats. Am J Physiol Regul Integr Comp Physiol. 2008;295:R2041–9.
Feinberg I, Campbell IG. Ketamine administration during waking increases delta EEG intensity in rat sleep. Neuropsychopharmacology. 1993;9:41–8.
Campbell IG, Feinberg I. NREM delta stimulation following MK-801 is a response of sleep systems. J Neurophysiol. 1996;76:3714–20.
• Duncan WC, Sarasso S, Ferrarelli F, Selter J, Riedner BA, Hejazi NS, et al. Concomitant BDNF and sleep slow wave changes indicate ketamine-induced plasticity in major depressive disorder. Int J Neuropsychopharmacol. 2013;16:301–11. This clinical study of ketamine’s antidepressant effects in treatment-resistant depression shows that ketamine acutely increases BDNF, slow wave activity, the occurrence of high amplitude waves, and slow wave slope, consistent with increased synaptic strength. Changes in BDNF levels are proportional to changes in EEG parameters in patients who responded to ketamine treatment, suggesting that enhanced synaptic plasticity is part of the rapid antidepressant.
Duncan Jr WC, Selter J, Brutsche N, Sarasso S, Zarate Jr CA. Baseline delta sleep ratio predicts acute ketamine mood response in major depressive disorder. J Affect Disord. 2013;145:115–9.
Cornwell BR, Salvadore G, Furey M, Marquardt CA, Brutsche NE, Grillon C, et al. Synaptic potentiation is critical for rapid antidepressant response to ketamine in treatment-resistant major depression. Biol Psychiatry. 2012;72:555–61.
Selter J, Duncan WC, Luckenbaugh D, Chen G, Zarate C. Differential slow wave sleep response to ketamine in MDD versus BP Disorder. Abstracts of the Society for Neuroscience, Washington DC, November 12-16, 2011; 2011
Landsness EC, Goldstein MR, Peterson MJ, Tononi G, Benca RM. Antidepressant effects of selective slow wave sleep deprivation in major depression: a high-density EEG investigation. J Psychiatr Res. 2011;45:1019–26.
Friston KJ, Sharpley AL, Solomon RA, Cowen PJ. Lithium increases slow wave sleep: possible mediation by brain 5-HT2 receptors? Psychopharmacology (Berl). 1989;98:139–40.
Kupfer DJ, Reynolds 3rd CF, Weiss BL, Foster FG. Lithium carbonate and sleep in affective disorders. Further considerations. Arch Gen Psychiatry. 1974;30:79–84.
Lanoir J, Lardennois D. The action of lithium carbonate on the sleep-waking cycle in the cat. Electroencephalogr Clin Neurophysiol. 1977;42:676–90.
Son H, Yu IT, Hwang SJ, Kim JS, Lee SH, Lee YS, et al. Lithium enhances long-term potentiation independently of hippocampal neurogenesis in the rat dentate gyrus. J Neurochem. 2003;85:872–81.
Gray NA, Zhou R, Du J, Moore GJ, Manji HK. The use of mood stabilizers as plasticity enhancers in the treatment of neuropsychiatric disorders. J Clin Psychiatry. 2003;64 Suppl 5:3–17.
Harding GF, Alford CA, Powell TE. The effect of sodium valproate on sleep, reaction times, and visual evoked potential in normal subjects. Epilepsia. 1985;26:597–601.
Beaulieu JM. Not only lithium: regulation of glycogen synthase kinase-3 by antipsychotics and serotonergic drugs. Int J Neuropsychopharmacol. 2007;10:3–6.
Beurel E, Song L, Jope RS. Inhibition of glycogen synthase kinase-3 is necessary for the rapid antidepressant effect of ketamine in mice. Mol Psychiatry. 2011;16:1068–70.
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Conflict of Interest
Wallace C. Duncan, Jr., declares that he has no conflict of interest.
Carlos A. Zarate, Jr., is listed as a coinventor on a patent application for the use of ketamine and its metabolites in major depression. Dr. Zarate has assigned his rights in the patent to the US government but will share a percentage of any royalties that may be received by the government.
Human Rights and Informed Consent
The MDD and BP patients that are discussed in this review were part of studies that were approved by the Combined Neuroscience Institutional Review Board of the National Institutes of Health. All subjects provided written informed consent before entry into the studies.
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This article is part of the Topical Collection on Sleep Disorders
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Duncan, W.C., Zarate, C.A. Ketamine, Sleep, and Depression: Current Status and New Questions. Curr Psychiatry Rep 15, 394 (2013). https://doi.org/10.1007/s11920-013-0394-z
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DOI: https://doi.org/10.1007/s11920-013-0394-z
Keywords
- Ketamine
- NMDA antagonist
- Sleep
- Major depressive disorder
- MDD
- Synaptic plasticity
- Slow wave sleep
- Slow wave activity
- SWA
- AMPA
- Mood
- Rapid antidepressant response
- Neurotrophic factors
- Brain-derived neurotrophic factor
- BDNF
- Treatment-resistant depression
- Bipolar depression
- Sleep disorders
- Psychiatry