We examined whether galantamine (GAL), a cholinesterase inhibitor and allosteric potentiating ligand for α7 nicotinic acetylcholine receptor (nAChR), had an impact on emotional abnormalities in forebrain-specific cholecystokinin receptor-2 overexpressed transgenic mice. Treatment with GAL (1 mg/kg, s.c.) attenuated the decrease of social interaction time, but failed to attenuate anxiety-like behavior in the elevated plus-maze test. The effect of GAL was blocked by an α7 nAChR antagonist, methyllycaconitine (3 mg/kg, i.p.). These results suggest that GAL improved social interaction impairments via α7 nAChR and could be useful to treat sociability-related emotional abnormalities.
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