Assessment of brain muscarinic acetylcholinergic receptors in living mice using a simple probe, [ 125I]-4-iododexetimide and [ 125I]-4-iodolevetimide

Abstract

This study describes assessment of brain muscarinic acetylcholinergic receptors in living mice using a single-crystal radiation detection system, the high-affinity antagonist [ 125I]-4-iododexetimide, and the inactive enantiomer [ 125I]-4-iodolevetimide. Kinetics of radioligand binding, as well as perturbation by atropine displacement, can be determined using this simple probe technique.