Abstract:
:We tested the hypothesis that asymptomatic carriers of dopa-responsive dystonia (DRD) have increased dopamine D2 receptors in the striatum that protect them from the clinical manifestations of dopaminergic deficiency. We examined striatal D2-receptor binding in (1) symptomatic subjects (treated and untreated) and (2) asymptomatic gene carriers. Using [11C]-raclopride PET, we found elevated striatal D2-receptor binding in both groups. In one of our drug-naive symptomatic subjects, 7 months of treatment with levodopa/carbidopa did not affect the receptor binding as measured on a second scan. We conclude that increased D2-receptor binding in DRD may be a homeostatic response to the dopaminergic deficit in subjects carrying the DRD gene, but is not the sole factor determining the clinical state of these individuals.
journal_name
Neurologyjournal_title
Neurologyauthors
Kishore A,Nygaard TG,de la Fuente-Fernandez R,Naini AB,Schulzer M,Mak E,Ruth TJ,Calne DB,Snow BJ,Stoessl AJdoi
10.1212/wnl.50.4.1028subject
Has Abstractpub_date
1998-04-01 00:00:00pages
1028-32issue
4eissn
0028-3878issn
1526-632Xjournal_volume
50pub_type
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