Abstract：
:The effects of intracerebroventricular administration of 6-hydroxydopamine (6-OHDA) and 5,7-dihydroxytryptamine (5,7-DHT) on sodium-sensitive [3H]mazindol binding were investigated in the rat hypothalamus and corpus striatum. In the hypothalamus, specific [3H]mazindol binding was inhibited by low concentrations of sodium and stimulated by high-sodium concentrations, whereas in the corpus striatum, only a sodium-dependent stimulation of [3H]mazindol binding was observed. Lesions with 6-OHDA significantly reduced sodium-dependent [3H]mazindol binding in the corpus striatum, but had no effect on the binding of [3H]mazindol in the absence of sodium. Lesions of serotonergic neurons with 5,7-DHT, however, had no effect on [3H]mazindol binding in the striatum, but resulted in a significant increase in the number of [3H]mazindol binding sites in the hypothalamus. These data suggest that [3H]mazindol may bind to two anatomically distinct binding sites, one that is stimulated and the other inhibited by sodium. The sodium-stimulated binding sites appear to be located on dopaminergic terminals in the striatum, and in the hypothalamus, the sodium-inhibited sites appear to be regulated by serotonergic neuronal activity.
journal_name
Brain Resjournal_title
Brain researchauthors
Angel I,Janowsky A,Paul SMdoi
10.1016/0006-8993(89)91687-9subject
Has Abstractpub_date
1989-12-04 00:00:00pages
339-41issue
2eissn
0006-8993issn
1872-6240pii
0006-8993(89)91687-9journal_volume
503pub_type
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