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A series of microPET imaging studies were conducted in anesthetized rhesus monkeys using the dopamine D3‐selective partial agonist, [18F]5. There was variable uptake in regions of brain known to express a high density of D3 receptors under baseline conditions. Pretreatment with lorazepam (1 mg/kg, i.v. 30 min) to reduce endogenous dopamine activity before tracer injection resulted in a dramatic increase...
4‐(Dimethylamino)‐N‐(4‐(4‐(2‐methoxyphenyl)piperazin‐1‐yl)butyl)benzamide (WC‐10), a N‐phenyl piperazine analog, displays high affinity and moderate selectivity for dopamine D3 receptors versus dopamine D2 receptors (Chu et al. [2005] Bioorg Med Chem 13:77–87). In this study, WC‐10 was radiolabeled with tritium (specific activity = 80 Ci/mmol), and quantitative autoradiography studies were conducted...
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