Published in:
Open Access
01-02-2009 | Original Article
Reduced striatal D2 receptor binding in myoclonus–dystonia
Authors:
R. J. Beukers, J. Booij, N. Weisscher, F. Zijlstra, T. A. M. J. van Amelsvoort, M. A. J. Tijssen
Published in:
European Journal of Nuclear Medicine and Molecular Imaging
|
Issue 2/2009
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Abstract
Purpose
To study striatal dopamine D2 receptor availability in DYT11 mutation carriers of the autosomal dominantly inherited disorder myoclonus–dystonia (M–D).
Methods
Fifteen DYT11 mutation carriers (11 clinically affected) and 15 age- and sex-matched controls were studied using 123I-IBZM SPECT. Specific striatal binding ratios were calculated using standard templates for striatum and occipital areas.
Results
Multivariate analysis with corrections for ageing and smoking showed significantly lower specific striatal to occipital IBZM uptake ratios (SORs) both in the left and right striatum in clinically affected patients and also in all DYT11 mutation carriers compared to control subjects.
Conclusions
Our findings are consistent with the theory of reduced dopamine D2 receptor (D2R) availability in dystonia, although the possibility of increased endogenous dopamine, and consequently, competitive D2R occupancy cannot be ruled out.