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We studied the effects of perospirone (SM-9018), a novel serotonin-2 (5-HT2) and dopamine-2 (D2) receptor antagonist (SDA), on conditioned fear stress (CFS)-induced freezing behavior in rats and compared its actions with those of other antipsychotics. Exposure of rats to the environment previously paired with foot shock induced marked freezing behavior,(More)
SM-9018 (cis-2-(4-(4-(1,2-benzisothiazol-3-yl)-1-piperazinyl)butyl) hexahydro-1 H-isoindole-1,3(2H)-dione HCl) is a potential atypical antipsychotic with high affinity for 5-HT2, dopamine D2 and 5-HT1A receptors. Northern blot analysis was performed to compare the effects of SM-9018 and of haloperidol on the striatal c-fos mRNA expression in rats.(More)
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