Thursday, May 11, 2023

Taking a “trip” inside the cell: New research shows how psychedelics promote neuroplasticity

 

Your doctor should already be well versed in mushrooms and micro-dosing. If not, you don't have a functioning stroke doctor. Which means your doctor is woefully inadequate in neuroplasticity, your main means to recovery

Taking a “trip” inside the cell: New research shows how psychedelics promote neuroplasticity 

Psychedelics promote neuroplasticity through the activation of intracellular 5-HT2A receptors

Science
16 Feb 2023
Vol 379, Issue 6633
pp. 700-706

  • The mechanism underlying psychedelic action

    Psychedelic compounds promote cortical structural and functional neuroplasticity through the activation of serotonin 2A receptors. However, the mechanisms by which receptor activation leads to changes in neuronal growth are still poorly defined. Vargas et al. found that activation of intracellular serotonin 2A receptors is responsible for the plasticity-promoting and antidepressant-like properties of psychedelic compounds, but serotonin may not be the natural ligand for those intracellular receptors (see the Perspective by Hess and Gould). —PRS

    Abstract

    Decreased dendritic spine density in the cortex is a hallmark of several neuropsychiatric diseases, and the ability to promote cortical neuron growth has been hypothesized to underlie the rapid and sustained therapeutic effects of psychedelics. Activation of 5-hydroxytryptamine (serotonin) 2A receptors (5-HT2ARs) is essential for psychedelic-induced cortical plasticity, but it is currently unclear why some 5-HT2AR agonists promote neuroplasticity, whereas others do not. We used molecular and genetic tools to demonstrate that intracellular 5-HT2ARs mediate the plasticity-promoting properties of psychedelics; these results explain why serotonin does not engage similar plasticity mechanisms. This work emphasizes the role of location bias in 5-HT2AR signaling, identifies intracellular 5-HT2ARs as a therapeutic target, and raises the intriguing possibility that serotonin might not be the endogenous ligand for intracellular 5-HT2ARs in the cortex.

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