Tachykinin regulation of serotonin release: enhancement of [3H]serotonin release from rat cerebral cortex by neuromedin K and substance P acting at distinct receptor sites

Academic Article
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publication date

  • January 1987

abstract

  • Neuromedin K and substance P (SP) enhanced the basal (5 mM K+) and potassium-evoked (40 mM K+) release of [3H]5-hydroxytryptamine ([3H]5-HT) from slices of the rat cerebral cortex. The effects of the two tachykinins were additive. The SP antagonist span-tide ([D-Arg1, D-Trp7.9, Leu11]-SP) (10(-6) M) inhibited the stimulatory effect of SP but not of neuromedin K on the release of [3H]5-HT. These findings suggest that the two tachykinins exhibit their effects on serotonin release at distinct receptor sites.