WAY-100635 maleate salt is a potent and selective 5-hydroxytryptamine 1A (5-HT1A) receptor antagonist with an IC50 value of 0.91 nM and Ki value of 0.39 nM. WAY-100635 maleate salt has pIC50 values for 5-HT1A and α1-adrenergic receptors of 8.9 and 6.6, respectively. WAY-100635 maleate salt is also a potent dopamine D4 receptor agonist[1][2][3].
The functional properties and binding affinities of WAY-100635 are evaluated in HEK 293 cells stably expressing dopamine D2L or D4.4 receptors[1].WAY-100635 displays 940, 370, and 16 nM binding affinities at D2L, D3, and D4.2 receptors, respectively. Saturation analyses demonstrat that the Kd of [3H]WAY-100635 at D4.2 receptors is 2.4 nM. WAY-100635 is potent agonist in HEK-D4.4 cells with EC50 of 9.7 nM. WAY-100635 possesses high affinity for D4.4 receptor (3.3 nM) [1].
WAY-100635 (1 mg/kg; subcutaneous injection; male Sprague-Dawley rats) treatment abolishes the reduction of the severity of abstinence signs induced by Rhodiola rosea administration in nicotine-dependent rat[2].
References:
[1]. Chemel BR, et al. WAY-100635 is a potent dopamine D4 receptor agonist. Psychopharmacology (Berl). 2006 Oct;188(2):244-51.
[2]. Mannucci C, et al. Serotonin involvement in Rhodiola rosea attenuation of nicotine withdrawal signs in rats. Phytomedicine. 2012 Sep 15;19(12):1117-24.
[3]. Al Hussainy R, et al. Design, synthesis, radiolabeling, and in vitro and in vivo evaluation of bridgehead iodinatedanalogues of N-{2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl}-N-(pyridin-2-yl)cyclohexanecarboxamide (WAY-100635) as potential SPECT ligands for the 5-HT1A receptor. J Med Chem. 2011 May 26;54(10):3480-91.