Abstract
A high performance liquid chromatographic system was developed for separation of 11C-labeled 5-hydroxy- l-tryptophan ([ 11C]HTP) and in vivo formed radiolabeled metabolites in rat brain tissue. Analysis of brain homogenate revealed that the main part of the radioactivity was associated with 11C-labeled 5-hydroxyindole-3-acetic acid after intravenous injection of [ 11C]HTP to the rat. The serotonin synthesis rate in the brain was calculated and closely correlated to the serotonin synthesis rate in monkey and human measured using positron emission tomography.
Published Version
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