PMID- 32440333 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240328 IS - 2045-1253 (Print) IS - 2045-1261 (Electronic) IS - 2045-1253 (Linking) VI - 10 DP - 2020 TI - Ketamine as an antidepressant: overview of its mechanisms of action and potential predictive biomarkers. PG - 2045125320916657 LID - 10.1177/2045125320916657 [doi] LID - 2045125320916657 AB - Ketamine, a drug introduced in the 1960s as an anesthetic agent and still used for that purpose, has garnered marked interest over the past two decades as an emerging treatment for major depressive disorder. With increasing evidence of its efficacy in treatment-resistant depression and its potential anti-suicidal action, a great deal of investigation has been conducted on elucidating ketamine's effects on the brain. Of particular interest and therapeutic potential is the ability of ketamine to exert rapid antidepressant properties as early as several hours after administration. This is in stark contrast to the delayed effects observed with traditional antidepressants, often requiring several weeks of therapy for a clinical response. Furthermore, ketamine appears to have a unique mechanism of action involving glutamate modulation via actions at the N-methyl-D-aspartate (NMDA) and alpha -amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors, as well as downstream activation of brain-derived neurotrophic factor (BDNF) and mechanistic target of rapamycin (mTOR) signaling pathways to potentiate synaptic plasticity. This paper provides a brief overview of ketamine with regard to pharmacology/pharmacokinetics, toxicology, the current state of clinical trials on depression, postulated antidepressant mechanisms and potential biomarkers (biochemical, inflammatory, metabolic, neuroimaging sleep-related and cognitive) for predicting response to and/or monitoring of therapeutic outcome with ketamine. CI - (c) The Author(s), 2020. FAU - Matveychuk, Dmitriy AU - Matveychuk D AD - Department of Psychiatry, Neurochemical Research Unit, University of Alberta, Edmonton, Alberta, Canada. FAU - Thomas, Rejish K AU - Thomas RK AD - Grey Nuns Community Hospital and Department of Psychiatry, University of Alberta, Edmonton, Alberta, Canada. FAU - Swainson, Jennifer AU - Swainson J AD - Misericordia Community Hospital and Department of Psychiatry, University of Alberta, Edmonton, Alberta, Canada. FAU - Khullar, Atul AU - Khullar A AD - Grey Nuns Community Hospital and Department of Psychiatry, University of Alberta, Edmonton, Alberta, Canada. FAU - MacKay, Mary-Anne AU - MacKay MA AD - Department of Psychiatry, Neurochemical Research Unit, University of Alberta, Edmonton, Alberta, Canada. FAU - Baker, Glen B AU - Baker GB AUID- ORCID: 0000-0003-1581-6486 AD - Department of Psychiatry, Neurochemical Research Unit, University of Alberta, 12-105B Clin Sci Bldg, Edmonton, Alberta T6G 2G3, Canada. FAU - Dursun, Serdar M AU - Dursun SM AD - Department of Psychiatry, Neurochemical Research Unit, University of Alberta, Edmonton, Alberta, Canada. LA - eng PT - Journal Article DEP - 20200511 PL - England TA - Ther Adv Psychopharmacol JT - Therapeutic advances in psychopharmacology JID - 101555693 PMC - PMC7225830 OTO - NOTNLM OT - antidepressant OT - biomarkers OT - cognition OT - ketamine OT - mechanism of action OT - metabolism OT - neuroimaging OT - sleep COIS- Conflict of interest statement: JS has been paid speaking honoraria by Otsuka and Lundbeck and has served on advisory boards for Otsuka, Lundbeck, and Janssen. RKT and SMD have also served on advisory boards for Janssen. AK has been paid honoraria for speaking from, and has served on advisory boards for Pfizer, Takeda, Lundbeck, Janssen-Ortho, Purdue, Sunovion, Allergan, Otsuka and Merck, and has received speaking honoraria from Bausch Health; he has also received research funding from AstraZeneca, Sanofi-Aventis, Pfizer and Merck. None of the companies mentioned above has had a role in the preparation of this review paper. EDAT- 2020/05/23 06:00 MHDA- 2020/05/23 06:01 PMCR- 2020/05/11 CRDT- 2020/05/23 06:00 PHST- 2020/01/14 00:00 [received] PHST- 2020/03/02 00:00 [accepted] PHST- 2020/05/23 06:00 [entrez] PHST- 2020/05/23 06:00 [pubmed] PHST- 2020/05/23 06:01 [medline] PHST- 2020/05/11 00:00 [pmc-release] AID - 10.1177_2045125320916657 [pii] AID - 10.1177/2045125320916657 [doi] PST - epublish SO - Ther Adv Psychopharmacol. 2020 May 11;10:2045125320916657. doi: 10.1177/2045125320916657. eCollection 2020.