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  • 1
    Electronic Resource
    Electronic Resource
    Characterisation of Inhibitory 5-Hydroxytryptamine Receptors That Modulate Dopamine Release in the Striatum (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 36 (1981), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The effect of a series of indoleamines on the potassium-evoked tritium release of previously accumulated [3H]dopamine from rat striatal slices has been investigated. The indoleamines 5-hydroxytryptamine, 5-methoxy-tryptamine, 5-methoxy-N, N′-dimethyltryptamine and tryptamine (10−7 to 10−3 M) all reduced potassium-evoked release of tritium, to a maximum of 50%. The uptake of [3H]dopamine was unaffected by these compounds. A series of 5-hydroxytryptamine antagonists were examined for their ability to reduce the inhibition of potassium-evoked tritium release induced by 5-methoxytryptamine. The relative order of antagonist potency obtained was methysergide 〉 metergoline 〉 methiothepin 〉 cinanserin 〉 cyproheptadine 〉 mianserin, and was consistent with an action on 5-hydroxytryptamine receptors. It is concluded that there are inhibitory 5-hydroxytryptamine receptors located on the terminals of dopaminergic neurones in the striatum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1981.tb00594.x
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  • 2
    Electronic Resource
    Electronic Resource
    Evidence that 5-HT agonist-induced rotational behaviour in the rat is mediated via 5-HT1 receptors (1984)
    Springer
    Psychopharmacology 83 (1984), S. 163-165 
    Details
    ISSN: 1432-2072
    Keywords: Supersensitivity ; 5-HT1 receptors ; Methysergide ; Ketanserin ; Pirenperone ; 5-HT agonist rotational behaviour ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The rotational behaviour induced by 5-HT agonists has been investigated in rats with lesions of the dorsal raphe' nucleus (DRN). We have previously reported that 5-methyoxy-N,N-dimethyl-tryptamine (5-MeODMT) caused dose-related contralateral rotation in rats with 5,7-dihydroxytryptamine (5,7-DHT) lesions of the DRN. Similar findings are now presented for the 5-HT1 agonists 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) and 5-methoxy-3 (1,2,3,6-tetrahydropyridin-4-yl) (1H indole) (RU24969). In this model, in agreement with the behavioural studies, both agonists were shown to have a greater affinity for the 5-HT1 binding site when compared with the 5-HT2 binding site. Antagonist studies using selective 5-HT2 antagonists (ketanserin and pirenperone) at non-sedative doses failed to inhibit this behaviour. In contrast, the classical 5-HT antagonist methysergide caused significant inhibition of the rotational behaviour. These results suggest that 5-HT agonist-induced rotation in the rat is mediated via 5-HT1 receptors, probably located in the substantia nigra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00429727
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    Paper (German National Licenses)
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