Abstract
The effect of serotonin agonists on the depolarization (K+)-induced, calcium-dependent, release of [3H]dopamine (DA) from rat nucleus accumbens and striatal slices was investigated. Serotonin enhanced basal3H overflow and reduced K+-induced release of [3H]DA from nucleus accumbens slices. The effect of serotonin on basal3H overflow was not altered by the serotonin antagonist, methysergide, or the serotonin re-uptake blocker, chlorimipramine, but was reversed by the DA re-uptake carrier inhibitors nomifensine and benztropine. With the effect on basal overflow blocked, serotonin did not modulate K+-induced release of [3H]DA in the nucleus accumbens or striatum. The serotonin agonists, quipazine (in the presence of nomifensine) and 5-methoxytryptamine, did not significantly affect K+-induced release of [3H]DA in the nucleus accumbens. This study does not support suggestions that serotonin receptors inhibit the depolarization-induced release of dopamine in the nucleus accumbens or striatum of the rat brain. The present results do not preclude the possibility that serotonin may affect the mesolimbic reward system at a site which is post-synaptic to dopaminergic terminals in the nucleus accumbens.
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Nurse, B., Russell, V.A. & Taljaard, J.J.F. Characterization of the effects of serotonin on the release of [3H]dopamine from rat nucleus accumbens and striatal slices. Neurochem Res 13, 403–407 (1988). https://doi.org/10.1007/BF01268873
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DOI: https://doi.org/10.1007/BF01268873