Multiple high-affinity [3H]serotonin binding sites in human frontal cortex.
High-affinity [3H]serotonin (5-hydroxytryptamine, 5-HT) binding sites from human frontal cortex can be divided into at least 3 pharmacological subtypes (5-HT1A, 5-HT1B and 5-HT3) based on affinity for [3H]serotonin and spiperone. All 3 sites are solubilized by 3% Triton X-100, 1% Tween-80 and can be enriched by serotonin-linked-Sepharose 4B affinity chromatography. However, 5-HT3 sites are more sensitive to heat inactivation, long-term storage, and sulfhydrylalkylation. The pharmacological profiles are distinct for the spiperone-insensitive 5-HT1B and 5-HT3 sites in both human and bovine cortex. In addition, evidence is presented for the existence of a novel, low concentration [3H]serotonin binding site in human cortex.
D000368:Aged; D001665:Binding Sites; D001667:Binding, Competitive; D055598:Chemical Phenomena; D002621:Chemistry; D005260:Female; D005625:Frontal Lobe / Q000378:metabolism*; D006801:Humans; D008297:Male; D009419:Nerve Tissue Proteins / Q000378:metabolism; D012701:Serotonin / Q000378:metabolism*; D014316:Tritium
D009419:Nerve Tissue Proteins; D014316:Tritium; D012701:Serotonin