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RO5166017 is an agonist of trace amine-associated receptor 1 (TAAR1).1 It binds to TAAR1 (Kis = 31, 24, 1.9, and 2.7 nM in HEK293 cells expressing the recombinant human, cynomolgus monkey, mouse, or rat receptor, respectively) and is greater than 15-fold selective for TAAR1 over a panel of 123 receptors, ion channels, and transporters at 10 µM. RO5166017 induces cAMP production in HEK293 cells expressing the recombinant human, cynomolgus monkey, mouse, or rat TAAR1 (EC50s = 55, 97, 3.3, and 14 nM, respectively). It reduces the frequency of neuronal firing in mouse ventral tegmental area (VTA) and dorsal raphe nucleus (DRN) slices (IC50s = 1.73 and 2.99 nM, respectively), which endogenously express high levels of dopaminergic and serotonergic neurons, respectively. RO5166017 (0.3 mg/kg) inhibits stress-induced hyperthermia, indicating anxiolytic-like activity, as well as reduces cocaine-induced hyperlocomotion, in mice. It also impairs expression, but not reconsolidation, of cocaine-induced place preference in rats.2

1.Revel, F.G., Moreau, J.-L., Gainetdinov, R.R., et al.TAAR1 activation modulates monoaminergic neurotransmission, preventing hyperdopaminergic and hypoglutamatergic activityProc. Natl. Acad. Sci. USA108(20)8485-8490(2011) 2.Liu, J.-F., Thorn, D.A., Zhang, Y., et al.Effects of trace amine-associated receptor 1 agonists on the expression, reconsolidation, and extinction of cocaine reward memoryInt. J. Neuropsychopharmacol.19(7)pyw009(2016)

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