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Evidence for dopamine D-2 receptors on cholinergic interneurons in the rat caudate-putamen

Journal Article · · Life Sci.; (United States)
The aziridinium ion of ethylcholine (AF64A) is a neurotoxin that has demonstrated selectivity for cholinergic neurons. Unilateral stereotaxic injection of AF64A into the caudate-putamen of rats, resulted in a decrease in dopamine D-2 receptors as evidenced by a decrease in (/sup 3/H)-sulpiride binding. Dopamine D-1 receptors, labeled with (/sup 3/H)-SCH 23390, were unchanged. The efficacy of the lesion was demonstrated by the reduction of Na/sup +/-dependent high affinity choline uptake sites labeled with (/sup 3/H)-hemicholinium-3. These data indicate that a population of D-2 receptors are postsynaptic on cholinergic interneurons within the striatum of rat brain.
Research Organization:
Univ. of Utah Medical Center, Salt Lake City (USA)
OSTI ID:
5243445
Journal Information:
Life Sci.; (United States), Journal Name: Life Sci.; (United States) Vol. 42:20; ISSN LIFSA
Country of Publication:
United States
Language:
English