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Psychedelic Drugs: Types, Uses, and Effects The ability of the compounds to induce release of stored monoamines from rat brain synaptosomes also was studied. The six phenethylamines were virtually inactive, as was DPT, having no effect at 10−4 M of the drug. These results seem to suggest that, in general, effects of psychedelics on monoamine reuptake and release may not be relevant and that direct receptor actions remain most important. Schmid and Bohn followed up on this in vivo finding by studying Akt phosphorylation in primary neuronal cultures from the frontal cortex of WT and β-arrestin-2 KO neonates. Serotonin (1 μM) gave a robust phosphorylation of Akt in WT cortical neurons, but neither N-methylserotonin nor 5-MeO-DMT activated Akt. Pretreatment with M blocked Akt phosphorylation in WT neurons after serotonin treatment, showing that the effects of serotonin were mediated through the 5-HT2A receptor. Szabo concluded that dimethyltryptamines may serve as important regulators o