Abstract
This study aimed at comparing the binding characteristics of [3H]ketanserin, a high-affinity serotonin 2A (5-HT2A) receptor antagonist, in the prefrontal cortex, hippocampus and striatum of human brain post-mortem. The results indicated the presence of a single population of binding sites in all the regions investigated, with no statistical difference in maximum binding capacity (Bmax) or dissociation constant (Kd) values. The pharmacological profile of [3H]ketanserin binding was consistent with the labeling of the 5-HT2A receptor, since it revealed a competing drug potency ranking of ketanserin = spiperone > clozapine = haloperidol > methysergide > mesulergine > 5-HT. In conclusion, the 5-HT2A receptor, as labeled by [3H]ketanserin, would seem to consist of a homogenous population of binding sites and to be equally distributed in human prefronto-cortical, limbic and extrapyramidal structures.
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Marazziti, D., Rossi, A., Palego, L. et al. [3H]Ketanserin Binding in Human Brain Postmortem. Neurochem Res 22, 753–757 (1997). https://doi.org/10.1023/A:1027366413289
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DOI: https://doi.org/10.1023/A:1027366413289