Ro 04-6790 is an antagonist of the serotonin (5-HT) receptor subtype 5-HT6 (Ki = 44.7 nM).1 It is selective for 5-HT6 receptors over a panel of 23 additional receptors at 10 µM. Ro 04-6790 inhibits 5-HT-induced cAMP production in HeLa cells expressing human 5-HT6 (pA2 = 6.75). In vivo, Ro 04-6790 (10 and 30 mg/kg) induces stretching and yawning behavior in rats. It reverses scopolamine-induced decreases in novel object discrimination in rats.2 Ro 04-6790 (3, 10, and 30 mg/kg) also attenuates cue-induced cocaine-seeking behavior in rats.3
1.Sleight, A.J., Boess, F.G., BÖs, M., et al.Characterization of Ro 04-6790 and Ro 63-0563: Potent and selective antagonists at human and rat 5-HT6 receptorsBr. J. Pharmacol.124(3)556-562(1998) 2.Woolley, M.L., Marsden, C.A., Sleight, A.J., et al.Reversal of a cholinergic-induced deficit in a rodent model of recognition memory by the selective 5-HT6 receptor antagonist, Ro 04-6790Psychopharmacology (Berl)170(4)358-367(2003)