title: Positron emission tomography with 18F-dopa: interpretation and biological correlates in nonhuman primates.
abstract: Positron emission tomography (PET) was carried out, with 18F-DOPA as a ligand, in normal control monkeys and "parkinsonian" monkeys who had been treated with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine. The following approaches were used in data analysis: ratio of 18F accumulation in specific to nonspecific brain areas and 18F-DOPA influx constant obtained using either the actual plasma 18F-DOPA or the 18F activity in a nonspecific brain area as the input function. The results from these analyses were compared to one another and to biological parameters relevant to dopaminergic function. The striatum/cortex ratio and the rate constant calculated from plasma 18F-DOPA appeared to be the most sensitive analytic techniques.
mesh_terms: D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine; D000818:Animals; D002230:Carbidopa / Q000494:pharmacology; D002540:Cerebral Cortex / Q000000981:diagnostic imaging; D003342:Corpus Striatum / Q000000981:diagnostic imaging; D004295:Dihydroxyphenylalanine / Q000031:analogs & derivatives / Q000493:pharmacokinetics; D004298:Dopamine / Q000502:physiology*; D006719:Homovanillic Acid / Q000378:metabolism; D006897:Hydroxyindoleacetic Acid / Q000378:metabolism; D008253:Macaca mulatta; D008734:Methoxyhydroxyphenylglycol / Q000378:metabolism; D010302:Parkinson Disease, Secondary / Q000139:chemically induced / Q000000981:diagnostic imaging*; D011954:Receptors, Dopamine / Q000187:drug effects / Q000502:physiology*; D014055:Tomography, Emission-Computed
chemical_list: D011954:Receptors, Dopamine; C043437:fluorodopa F 18; D008734:Methoxyhydroxyphenylglycol; D006897:Hydroxyindoleacetic Acid; D004295:Dihydroxyphenylalanine; D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine; D002230:Carbidopa; D004298:Dopamine; D006719:Homovanillic Acid