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Updated: Feb 2, 2026
10:51
Real-time fMRI Biofeedback Targeting the Orbitofrontal Cortex for Contamination Anxiety
Published on: January 20, 2012
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Single-dose psilocybin promotes cell-type-specific changes of neurons in the orbitofrontal cortex
Ziran Huang1, Xiaoyan Wei1, Yihui Wang1
1Department of Neurobiology, School of Basic Medical Sciences and National Institute on Drug Dependence, Peking University, Beijing, 100191, China.
Summary
Psilocybin, a psychedelic, alters brain function by affecting specific neurons. This study reveals how psilocybin impacts layer 5 pyramidal neurons in the orbitofrontal cortex, offering insights into its therapeutic potential for psychological disorders.
Area of Science:
- Neuroscience
- Psychopharmacology
- Molecular Biology
Background:
- Psilocybin shows promise for treating psychological disorders like depression.
- The precise brain mechanisms and cell-specific effects of psilocybin are not fully understood.
- The orbitofrontal cortex (OFC) is implicated in depression and other psychological disorders.
Purpose of the Study:
- To investigate the long-term, cell type-specific effects of psilocybin on the OFC.
- To elucidate the molecular and functional changes induced by psilocybin in OFC neurons.
- To determine the role of the 5-HT2A receptor in psilocybin's effects.
Main Methods:
- Single-nucleus RNA sequencing (snRNA-seq) to analyze gene expression changes.
- Functional assays to assess neuronal activity and synaptic transmission.
- Genetic manipulation (knockdown) to investigate receptor function.
Main Results:
- A single psilocybin dose induced long-term genetic and functional changes in OFC neurons, particularly layer 5 pyramidal neurons.
- Psilocybin reduced glutamate receptor expression and impaired excitatory synaptic transmission in these neurons.
- Inhibitory neurons (Parvalbumin- and Somatostatin-positive) showed minimal changes.
- Targeting 5-HT2A receptors in layer 5 pyramidal neurons, but not inhibitory neurons, reversed psilocybin's effects.
Conclusions:
- Psilocybin exerts cell type-specific effects in the OFC, primarily impacting layer 5 pyramidal neurons.
- These findings highlight the role of excitatory neuron modulation in psilocybin's therapeutic actions.
- The study contributes to understanding the neural basis of psychedelic effects and potential brain region-specific differences.
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