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The 5‐HT 1 receptor agonist RU‐24969 decreases 5‐hydroxytryptamine (5‐HT) release and metabolism in the rat frontal cortex in vitro and in vivo

The 5‐HT 1 receptor agonist RU‐24969 decreases 5‐hydroxytryptamine (5‐HT) release and metabolism... 1 K+‐stimulated release of (3H)‐5‐hydroxytryptamine ((3H)‐5‐HT) from rat frontal cortex slices was decreased by the 5‐HT receptor agonists 5‐methoxy‐n1N‐dimethyltryptamine and 5‐methoxy‐3(1,2,3,6,‐tetrahydro‐4‐pyrindinyl)‐1H‐indole (RU‐24969) (1 × 10−5 M). 2 RU‐24969 (10 mg kg−1, i.p.) decreased extracellular 5‐HT and its metabolite 5‐hydroxyindoleacetic acid measured in vivo by use of intracerebral dialysis combined with high performance liquid chromatography and electrochemical detection. 3 The decrease in extracellular 5‐hydroxyindoleacetic acid in vivo after RU‐24969 (10 mg kg−1, i.p.) was also observed by in vivo voltammetry. 4 The non‐selective 5‐HT antagonist metergoline prevented the RU‐24969‐induced decrease in 5‐HT release and metabolism in vivo while the 5‐HT2 receptor antagonist R‐55669 (ritanserin) did not. 6 The results support the view that RU‐24969 stimulates a 5‐HT1 receptor that is involved in the autoregulation of 5‐HT release and metabolism. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png British Journal of Pharmacology Wiley

The 5‐HT 1 receptor agonist RU‐24969 decreases 5‐hydroxytryptamine (5‐HT) release and metabolism in the rat frontal cortex in vitro and in vivo

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References (26)

Publisher
Wiley
Copyright
1985 British Pharmacological Society
ISSN
0007-1188
eISSN
1476-5381
DOI
10.1111/j.1476-5381.1985.tb09451.x
Publisher site
See Article on Publisher Site

Abstract

1 K+‐stimulated release of (3H)‐5‐hydroxytryptamine ((3H)‐5‐HT) from rat frontal cortex slices was decreased by the 5‐HT receptor agonists 5‐methoxy‐n1N‐dimethyltryptamine and 5‐methoxy‐3(1,2,3,6,‐tetrahydro‐4‐pyrindinyl)‐1H‐indole (RU‐24969) (1 × 10−5 M). 2 RU‐24969 (10 mg kg−1, i.p.) decreased extracellular 5‐HT and its metabolite 5‐hydroxyindoleacetic acid measured in vivo by use of intracerebral dialysis combined with high performance liquid chromatography and electrochemical detection. 3 The decrease in extracellular 5‐hydroxyindoleacetic acid in vivo after RU‐24969 (10 mg kg−1, i.p.) was also observed by in vivo voltammetry. 4 The non‐selective 5‐HT antagonist metergoline prevented the RU‐24969‐induced decrease in 5‐HT release and metabolism in vivo while the 5‐HT2 receptor antagonist R‐55669 (ritanserin) did not. 6 The results support the view that RU‐24969 stimulates a 5‐HT1 receptor that is involved in the autoregulation of 5‐HT release and metabolism.

Journal

British Journal of PharmacologyWiley

Published: Sep 1, 1985

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