Abstract
[3H]dopamine (DA) accumulated by slices of rat substantia nigra was released following superfusion with Krebs solution containing 5-hydroxytryptamine (5-HT) in a dose-dependent fashion with maximal release being produced by 1 × 104 m. This 5-HT-induced release of [3H]DA was calcium-dependent and was inhibited by pretreatment with the 5-HT antagonist cinanserin. These results are interpreted as supporting the possibility that 5-HT has a role in regulating dopaminergic activity in the nigro-striatal pathway.