Add time:09/05/2019         Source:sciencedirect.com

Radioiodinated 2-hydroxy-3-(4-iodophenyl)-1-(4-phenylpiperidinyl)propane, 5 (4-HIPP), was synthesized and evaluated as a simple vesamicol-like radiotracer for mapping cholinergic pathways in the brain. Both enantiomers of 5 exhibit significant accumulation (approx. 2% of injected dose) and prolonged retention (t12 > 3 h) within the rat brain. The accumulation of radioiodinated 5 in the rat brain was reduced by up to 70% in the presence of vesamicol and its analogs. The levorotary isomer (−)-4-[123I)HIPP exhibits significant accumulation in the monkey brain, with a half-life of about 9 h. Radioiodinated 5 may therefore be a useful tool for studying cholinergic pathways in the brain.

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