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Udgivet

Effects of a single dose of psilocybin on behaviour, brain 5-HT2A receptor occupancy and gene expression in the pig

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  1. A Single Dose of Psilocybin Increases Synaptic Density and Decreases 5-HT2A Receptor Density in the Pig Brain

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  2. Plasma psilocin critically determines behavioral and neurobiological effects of psilocybin

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  3. Imaging of the Serotonin System: Radiotracers and Applications in Memory Disorders

    Publikation: Bidrag til bog/antologi/rapportBidrag til bog/antologiUndervisning

  4. Metaboliske, endokrine og andre systemiske sygdomme

    Publikation: Bidrag til bog/antologi/rapportBidrag til bog/antologiUndervisning

Vis graf over relationer

Psilocybin has in some studies shown promise as treatment of major depressive disorder and psilocybin therapy was in 2019 twice designated as breakthrough therapy by the U.S. Food and Drug Administration (FDA). A very particular feature is that ingestion of just a single dose of psilocybin is associated with lasting changes in personality and mood. The underlying molecular mechanism behind its effect is, however, unknown. In a translational pig model, we here present the effects of a single dose of psilocybin on pig behaviour, receptor occupancy and gene expression in the brain. An acute i.v. injection of 0.08 mg/kg psilocybin to awake female pigs induced characteristic behavioural changes in terms of headshakes, scratching and rubbing, lasting around 20 min. A similar dose was associated with a cerebral 5-HT2A receptor occupancy of 67%, as determined by positron emission tomography, and plasma psilocin levels were comparable to what in humans is associated with an intense psychedelic experience. We found that 19 genes were differentially expressed in prefrontal cortex one day after psilocybin injection, and 3 genes after 1 week. Gene Set Enrichment Analysis demonstrated that multiple immunological pathways were regulated 1 week after psilocybin exposure. This provides a framework for future investigations of the lasting molecular mechanisms induced by a single dose of psilocybin. In the light of an ongoing debate as to whether psilocybin is a safe treatment for depression and other mental illnesses, it is reassuring that our data suggest that any effects on gene expression are very modest.

OriginalsprogEngelsk
TidsskriftEuropean neuropsychopharmacology : the journal of the European College of Neuropsychopharmacology
Vol/bind42
Sider (fra-til)1-11
Antal sider11
ISSN0924-977X
DOI
StatusUdgivet - jan. 2021

Bibliografisk note

Copyright © 2020. Published by Elsevier B.V.

ID: 62236746