5-HT₆ Receptor Inhibitor

PUC-55 is a 5-HT₆R antagonist with a K_i of 37.5 nM that induces neuronal autophagy by inhibiting the mTOR pathway. It holds potential for research in the field of neurological disorders.

PZ-1657 hydrochloride (Compound 57) is a potent, selective and orally active 5-HT7 receptor inverse agonist with a K_i of 5 nM. PZ-1657 hydrochloride can inhibit the constitutive cAMP production mediated by the Gs signaling pathway (EC₅₀ = 2.93 nM). PZ-1657 hydrochloride can significantly reduce the MMP-9 activity mediated by 5-HT7 receptors in the hippocampus of mice, and the effect is comparable to that of SB-269970 (HY-15370). PZ-1657 hydrochloride can reverse the cognitive deficits observed in the rat novel object recognition test induced by Phencyclidine without affecting the animals' spontaneous activities. PZ-1657 hydrochloride can be used for the research of emotional disorders, such as depression and bipolar disorder.

5-Bromo-N,N-dimethyltryptamine, an active metabolite, is an antidepressant and sedative drug lead. 5-Bromo-N,N-dimethyltryptamine shows strong affinity towards 5-HT_1A, 5-HT_2B, 5-HT₆, and 5-HT₇.