title: Presence of conjugated 5-hydroxytryptamine in in vivo superfusates of rat spinal cord.
abstract: The presence of an acid-hydrolyzable conjugate of 5-hydroxytryptamine, presumably 5-hydroxytryptamine-O-sulfate, was demonstrated in in vivo superfusates of rat spinal cord by HPLC with electrochemical detection. In untreated rats, the concentration of the 5-hydroxytryptamine conjugate measured during the basal efflux of 5-hydroxytryptamine did not differ from that measured during the release of 5-hydroxytryptamine evoked by DL-p-chloroamphetamine. Pretreatment of the rats with clorgyline, an inhibitor of the enzyme monoamine oxidase (EC 1.4.3.4), or with probenecid did not alter the concentrations of conjugated 5-hydroxytryptamine measured during the basal efflux of 5-hydroxytryptamine, but did elevate the concentrations of conjugate measured during the evoked release of 5-hydroxytryptamine.
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D003010:Clorgyline / Q000494:pharmacology; D006897:Hydroxyindoleacetic Acid / Q000378:metabolism; D008297:Male; D011339:Probenecid / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D012701:Serotonin / Q000031:analogs & derivatives* / Q000032:analysis / Q000378:metabolism*; D013116:Spinal Cord / Q000187:drug effects / Q000378:metabolism*
chemical_list: C033396:5-hydroxytryptamine O-sulfate; D012701:Serotonin; D006897:Hydroxyindoleacetic Acid; D003010:Clorgyline; D011339:Probenecid