Journal article

IDENTITY OF INHIBITORY PRESYNAPTIC 5-HYDROXYTRYPTAMINE (5-HT) AUTORECEPTORS IN THE RAT-BRAIN CORTEX WITH 5-HT1B BINDING-SITES

G ENGEL, M GOTHERT, D HOYER, E SCHLICKER, K HILLENBRAND

Naunyn-Schmiedeberg's Archives of Pharmacology | SPRINGER VERLAG | Published : 1986

Abstract

In rat brain cortex slices preincubated with [3H]5-HT, the potencies of 17 5-HT receptor agonists to inhibit the electrically evoked 3H overflow and the affinities of 13 antagonists (including several beta-adrenoceptor blocking agents) to antagonize competitively the inhibitory effect of unlabelled 5-HT on evoked 3H overflow were determined. The affinities of the compounds for 5-HT1B and 5-HT2 binding sites in rat brain cortex membranes (labelled by [125I]cyanopindolol = [125I]-CYP in the presence of 30 mumol/l isoprenaline and [3H]ketanserin, respectively), for 5-HT1A binding sites in pig and rat brain cortex membranes (labelled by [3H]8-hydroxy-2-(di-n-propylamino)tetralin = [3H]8-OH-DPAT)..

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