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  • Title: Use of [3H]spiperone for labelling dopaminergic and serotonergic receptors in bovine caudate nucleus.
    Author: Withy RM, Mayer RJ, Strange PG.
    Journal: J Neurochem; 1981 Nov; 37(5):1144-54. PubMed ID: 7299393.
    Abstract:
    [3H]Spiperone binding has been used to study neurotransmitter receptors in bovine caudate nucleus in displacement and saturation binding experiments. Displacement curves for several antagonists are biphasic and can be analysed into contributions from dopaminergic and serotonergic sites. Antagonist binding at each class of sites follows the simple mass action equations for binding at a homogeneous set of sites (slope factors close to unity). Agonist displacement curves also indicate complex behaviour, but agonist binding to the dopaminergic sites alone exhibits heterogeneous properties (slope factors less than unity). Saturation binding experiments have been conducted on each class of site, defining dopaminergic binding of [3H]spiperone as that binding displaced by 0.1 mM-dopamine and serotonergic binding as that displaced by 0.3 microM-mianserin. In each case, a single class of binding sites was detected: the binding parameters derived in this way have been used to calculate the proportions of the two classes of binding site observed in displacement experiments. Good agreement was obtained between calculated and observe values.
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