title: Evidence for loss of brain [3H]spiroperidil and [3H]ADTN binding sites in rabbit brain with aging.
abstract: [3H]Spiroperidol and [3H]2-amino-6,7-dihydroxyl-1,2,3,4,-tetrahydronaphthalene hydrochloride (ADTN) binding were measured in various central nervous system regions of 5 month and 5.5 year old rabbits. In striatum, young animals had a 38% higher number of [3H]spiroperidol binding sites and a 140% higher number of [3H]ADTN binding sites than did the older animals. In frontal cortex and anterior limbic cortex there were respectively 42% and 26% more [3H]spiroperidol binding sites in the young animals. There was no change in the binding site number or affinity for [3H]spiroperidol in retina with aging. Pharmacological characterization demonstrated that [3H]spiroperidol binds to a dopamine receptor in striatum and to a serotonin receptor in cortex.
mesh_terms: D000375:Aging; D000818:Animals; D001667:Binding, Competitive; D001921:Brain / Q000378:metabolism*; D002090:Butyrophenones / Q000378:metabolism*; D003342:Corpus Striatum / Q000378:metabolism; D005625:Frontal Lobe / Q000378:metabolism; D008032:Limbic System / Q000378:metabolism; D009281:Naphthalenes / Q000378:metabolism*; D011817:Rabbits; D011954:Receptors, Dopamine / Q000378:metabolism*; D011985:Receptors, Serotonin / Q000378:metabolism*; D013134:Spiperone / Q000378:metabolism*; D013764:Tetrahydronaphthalenes / Q000378:metabolism*
chemical_list: D002090:Butyrophenones; D009281:Naphthalenes; D011954:Receptors, Dopamine; D011985:Receptors, Serotonin; D013764:Tetrahydronaphthalenes; D013134:Spiperone