AS19

AS19 is a potent, selective 5-HT₇ receptor agonist with an IC₅₀ value of 0.83 nM and a K_i of 0.6 nM. AS19 is selective for 5-HT₇ over 5-HT_1A, 5-HT_1B, 5-HT_1D, and 5-HT_5A receptors (K_is = 89.7 nM, 490 nM, 6.6 nM and 98.5 nM, respectively). AS19 enhances memory consolidation and reverses Scopolamine- or Dizocilpine-induced amnesia^[1][2][3]. In Vitro: The proliferation of T-cell from parachlorophenylalanine-treated mice is significantly reduced, addition of AS19 (1 μM) completely restores T-cell proliferation after 48 hours^[2]. In Vivo: AS19 (0.5-10 mg/kg; subcutaneous injection; for 24 hours; male Wistar rats) treatment improves memory consolidation in an autoshaping Pavlovian/instrumental learning task^[1].