Potent, non-selective galanin receptor antagonist (Ki values are 1.82 and 5.1 nM at GAL1 and GAL2 respectively) that inhibits galanin (1-29) binding in rat brain in vitro (IC50 = 3 - 15 nM). Attenuates the antidepressant effects of fluoxetine and blocks galanin-induced food intake in vivo. Also exhibits weak partial agonist activity at peripheral GAL2 receptors at doses > 100 nM.

CYM2503 is a positive allosteric modulator (PAM) of the GAL2 receptor that potentiates galanin-induced IP1 production in vitro.?

Potent and selective galanin receptor 2 (GAL2) agonist (EC50 = 38 nM, Ki values are 6.55, 497 and 587 nM at GAL2, GAL3 and GAL1 respectively). Has an additive effect on the signal transduction of galanin.