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Increased presynaptic dopamine function in Asperger syndrome.
Taina S Nieminen-von Wendt1, Liisa Metsähonkala, Tuula A Kulomäki
1Department of Child Neurology, Hospital for Children and Adolescents, Helsinki University Central Hospital, PL 280, FIN-00029 HYKS, Helsinki, Finland. taina.nieminen@sgic.fi
Neuroreport
|April 10, 2004
Summary
Investigating presynaptic dopamine function in Asperger syndrome using [18F]FDOPA PET scans revealed increased dopamine activity in the striatum and frontal cortex. These findings suggest dopamine system abnormalities may contribute to Asperger syndrome pathogenesis.
Area of Science:
- Neuroscience
- Psychiatry
- Dopamine System Research
Background:
- The precise causes of Asperger syndrome remain unclear.
- Abnormalities in the dopamine system are observed in disorders with overlapping symptoms.
- Previous research suggests a potential link between dopamine and Asperger syndrome.
Purpose of the Study:
- To investigate presynaptic dopamine function in individuals with Asperger syndrome.
- To explore the role of the dopamine system in the pathogenesis of Asperger syndrome.
Main Methods:
- Utilized positron emission tomography (PET) with 6-[18F]fluoro-L-DOPA ([18F]FDOPA) as a tracer.
- Examined eight healthy, drug-free males with Asperger syndrome and five healthy male controls.
- Quantified [18F]FDOPA influx (Ki) values in specific brain regions.
Main Results:
- Increased [18F]FDOPA influx (Ki) values were observed in the striatum (putamen and caudate nucleus) of individuals with Asperger syndrome.
- Elevated [18F]FDOPA influx (Ki) values were also found in the frontal cortex of the Asperger syndrome group.
- These results indicate alterations in presynaptic dopamine function.
Conclusions:
- The dopamine system appears to be affected in individuals with Asperger syndrome.
- Findings suggest potential overlap in pathogenesis between Asperger syndrome and schizophrenia, based on similar dopamine system alterations.
- Further research is warranted to elucidate the specific role of dopamine in Asperger syndrome.