5-HT2A receptor activation is dispensable for psilocybin-induced fear extinction and neuroplasticity in mice.
Chinese medical journal September 15, 2026 Yingjie Du, Xiangting Zhao, Quan Chen et al.
Psilocybin facilitates fear extinction in rodents, but its clinical utility is hampered by 5-hydroxytryptamine (5-HT) 2A-receptor-mediated hallucinogenic effects. This study aimed to explore whether 5-HT2A receptor is obligatory for psilocybin's fear extinction and neuroplasticity effect. Male C57BL/6J mice underwent auditory-cue fear conditioning. Ketanserin (5-HT2A/2C antagonist) or MDL100907...