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Ketamine a dissociative anesthetic: Neurobiology and biomolecular exploration in depression.

Guo-Liang Liu, Yun-Feng Cui, Chang Lu, Peng Zhao

Chemico-Biological Interactions February 19, 2020 DOI: 10.1016/j.cbi.2020.109006 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Review Peer reviewed
Intervention Ketamine
Topics Depression Ketamine Esketamine
Keywords Animals Humans Anesthetics, dissociative Signal transduction Gene expression Brain-derived neurotrophic factor Mitogen-activated protein kinase N-methyl d-aspartate receptor Endocannabinoid system Δ9-tetrahydrocannabinol Histone deacetylase 5
Key findings The authors propose that ketamine's antidepressant and psychotomimetic effects may involve NMDA receptor blockade and downstream gene expression and signaling cascades that outlast the drug's presence in the body. They contend that mechanistic actions at cellular and network levels remain incompletely understood and require further study before long-term use for depression can be approved.

Abstract

Ketamine is gaining ground as a potential treating depression because it has a distinct mode of action than typical drugs that influence monoamine neurotransmitters including noradrenaline, dopamine, or serotonin. Ketamine is thought to act by blocking N-methyl-d-aspartate (NMDA) receptors in the brain, which interact with the amino acid neurotransmitter glutamate. The resultant chemical changes in the brain caused by ketamine are not yet fully understood but could involve ketamine-induced gene expression and signaling cascades that act long after the drug has been eliminated from the body. Despite these remarkable effects, the widespread use of ketamine is limited by potential side effects including the emergence reactions (hallucinations, dreams, and out-of-body experiences) by recreational users, who need further study before long-term use of ketamine can be approved for depression. Thus, studies are necessary to further elucidate mechanistic actions of ketamine at cellular and network levels. Thus, we are exploring the involvement of molecular targets for the treatment and psychomimetic phenomena of the ketamine.

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