Striatal D1 dopamine receptor distribution following chemical lesion of the nigrostriatal pathway.
The morphochemical and biochemical distribution of the adenylate cyclase-linked dopamine receptor, or D1 subpopulation, has been examined in the rat striatum following a chemical lesion of the dopaminergic nigrostriatal pathway. The cellular pattern of D1 dopaminergic binding was assessed using in vitro autoradiographic localization of [3H]SCH 23390 or [125I]SCH 23982, selective D1 receptor antagonists, 1 week following unilateral infusion of the neurotoxin 6-hydroxydopamine (6-OHDA) into the substantia nigra. The specific association of the D1 binding sites with cyclic AMP-immunoreactive striatal neurons was abolished after lesion of the dopaminergic nigral afferents. The morphochemical disruption of the caudate D1 dopamine binding sites in relation to cyclic AMP-positive elements, a large proportion of which are striatonigral neurons, probably contributes to the dysfunctions in this subpopulation of dopamine receptor after depletion of the catecholamine neurotransmitter.
Ariano
M A
MA
Department of Anatomy and Neurobiology, University of Vermont College of Medicine, Burlington 05405.
D000818:Animals; D001552:Benzazepines / Q000378:metabolism; D003342:Corpus Striatum / Q000378:metabolism / Q000502:physiology*; D018492:Dopamine Antagonists; D006892:Hydroxydopamines; D007700:Kinetics; D008297:Male; D016627:Oxidopamine; D051381:Rats; D011919:Rats, Inbred Strains; D011954:Receptors, Dopamine / Q000378:metabolism*; D017447:Receptors, Dopamine D1; D017448:Receptors, Dopamine D2; D013378:Substantia Nigra / Q000502:physiology*
C049558:8-iodo-2,3,4,5-tetrahydro-3-methyl-5-phenyl-1H-3-benzazepine-7-ol; D001552:Benzazepines; D018492:Dopamine Antagonists; D006892:Hydroxydopamines; D011954:Receptors, Dopamine; D017447:Receptors, Dopamine D1; D017448:Receptors, Dopamine D2; D016627:Oxidopamine