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Brain glucose metabolism in Rett Syndrome.
Patricia M Villemagne1, Sakkubai Naidu, Victor L Villemagne
1Department of Radiology, Johns Hopkins Medical Institutions;, Baltimore, Maryland 21287-0807, USA.
Pediatric Neurology
|September 6, 2002
Summary
Rett syndrome, a neurologic disorder, shows decreased brain glucose metabolism in occipital areas and increased cerebellar uptake in affected girls. These changes resemble infant brain patterns, suggesting a maturational arrest.
Area of Science:
- Neurology
- Neuroscience
- Medical Imaging
Background:
- Rett syndrome is a severe, progressive neurologic disorder impacting girls in early childhood.
- Characterized by loss of psychomotor skills and intellectual disability.
- Distinct from other neurodevelopmental disorders like Down syndrome and autism.
Purpose of the Study:
- To investigate cerebral glucose metabolism in girls with Rett syndrome using FDG-PET.
- To compare metabolic patterns between patients and age-matched controls.
- To explore potential correlations with disease progression and neurodevelopmental stages.
Main Methods:
- Positron Emission Tomography (PET) scanning with [(18)F]fluorodeoxyglucose (FDG).
- Study included six female patients (4-15 years) diagnosed with Rett syndrome.
- Comparison with 18 age-matched healthy control subjects.
Main Results:
- A significant relative decrease in FDG uptake in lateral occipital areas was observed in both patient age groups (3-8 and 9-15 years).
- A relative increase in cerebellar FDG uptake was noted in both patient groups.
- Younger patients showed a relative increase in frontal tracer uptake, potentially linked to N-methyl-D-aspartate receptor changes.
Conclusions:
- Cerebral metabolic changes in Rett syndrome resemble those of infants, suggesting a maturational arrest.
- Preserved sensorimotor areas and cortical-subcortical structures indicate a unique disease pattern.
- Frontal lobe changes may correlate with clinical stages and receptor density alterations.