La maladie de Parkinson au Canada (serveur d'exploration)

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Glucose metabolism in small subcortical structures in Parkinson's disease

Identifieur interne : 001521 ( Main/Exploration ); précédent : 001520; suivant : 001522

Glucose metabolism in small subcortical structures in Parkinson's disease

Auteurs : Per Borghammer [Danemark] ; S Ren B. Hansen [Danemark] ; Carsten Eggers [Allemagne] ; Mallar Chakravarty [Canada] ; KIM VANG [Danemark] ; Joel Aanerud [Danemark] ; Rüdiger Hilker [Allemagne] ; Wolf-Dieter Heiss [Allemagne] ; Anders Rodell [Danemark] ; Ole L. Munk [Danemark] ; David Keator [États-Unis] ; Albert Gjedde [Danemark]

Source :

RBID : Pascal:12-0181360

Descripteurs français

English descriptors

Abstract

Objectives - Evidence from experimental animal models of Parkinson's disease (PD) suggests a characteristic pattern of metabolic perturbation in discrete, very small basal ganglia structures. These structures are generally too small to allow valid investigation by conventional positron emission tomography (PET) cameras. However, the high-resolution research tomograph (HRRT) PET system has a resolution of 2 mm, sufficient for the investigation of important structures such as the pallidum and thalamic subnuclei. Materials and metlaods - Using the HRRT, we performed [18F]-fluorodeoxyglucose (FDG) scans on 21 patients with PD and 11 age-matched controls. We employed three types of normalization: white matter, global mean, and data-driven normalization. We performed volume-of-interest analyses of small subcortical gray matter structures. Voxel-based comparisons were performed to investigate the extent of cortical hypometabolism. Results - The most significant level of relative subcortical hypermetabolism was detected in the external pallidum (GPe), irrespective of normalization strategy. Hypermetabolism was suggested also in the internal pallidum, thalamic subnuclei, and the putamen. Widespread cortical hypometabolism was seen in a pattern very similar to previously reported patterns in patients with PD. Conclusion - The presence and extent of subcortical hypermetabolism in PD is dependent on type of normalization. However, the present findings suggest that PD, in addition to widespread cortical hypometabolism, is probably characterized by true hypermetabolism in the GPe. This finding was predicted by the animal 2-deoxyglucose autoradiography literature, in which high-magnitude hypermetabolism was also most robustly detected in the GPe.


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<div type="abstract" xml:lang="en">Objectives - Evidence from experimental animal models of Parkinson's disease (PD) suggests a characteristic pattern of metabolic perturbation in discrete, very small basal ganglia structures. These structures are generally too small to allow valid investigation by conventional positron emission tomography (PET) cameras. However, the high-resolution research tomograph (HRRT) PET system has a resolution of 2 mm, sufficient for the investigation of important structures such as the pallidum and thalamic subnuclei. Materials and metlaods - Using the HRRT, we performed [
<sup>18</sup>
F]-fluorodeoxyglucose (FDG) scans on 21 patients with PD and 11 age-matched controls. We employed three types of normalization: white matter, global mean, and data-driven normalization. We performed volume-of-interest analyses of small subcortical gray matter structures. Voxel-based comparisons were performed to investigate the extent of cortical hypometabolism. Results - The most significant level of relative subcortical hypermetabolism was detected in the external pallidum (GPe), irrespective of normalization strategy. Hypermetabolism was suggested also in the internal pallidum, thalamic subnuclei, and the putamen. Widespread cortical hypometabolism was seen in a pattern very similar to previously reported patterns in patients with PD. Conclusion - The presence and extent of subcortical hypermetabolism in PD is dependent on type of normalization. However, the present findings suggest that PD, in addition to widespread cortical hypometabolism, is probably characterized by true hypermetabolism in the GPe. This finding was predicted by the animal 2-deoxyglucose autoradiography literature, in which high-magnitude hypermetabolism was also most robustly detected in the GPe.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Allemagne</li>
<li>Canada</li>
<li>Danemark</li>
<li>États-Unis</li>
</country>
<region>
<li>District de Darmstadt</li>
<li>Hesse (Land)</li>
</region>
<settlement>
<li>Francfort-sur-le-Main</li>
</settlement>
</list>
<tree>
<country name="Danemark">
<noRegion>
<name sortKey="Borghammer, Per" sort="Borghammer, Per" uniqKey="Borghammer P" first="Per" last="Borghammer">Per Borghammer</name>
</noRegion>
<name sortKey="Aanerud, Joel" sort="Aanerud, Joel" uniqKey="Aanerud J" first="Joel" last="Aanerud">Joel Aanerud</name>
<name sortKey="Borghammer, Per" sort="Borghammer, Per" uniqKey="Borghammer P" first="Per" last="Borghammer">Per Borghammer</name>
<name sortKey="Gjedde, Albert" sort="Gjedde, Albert" uniqKey="Gjedde A" first="Albert" last="Gjedde">Albert Gjedde</name>
<name sortKey="Gjedde, Albert" sort="Gjedde, Albert" uniqKey="Gjedde A" first="Albert" last="Gjedde">Albert Gjedde</name>
<name sortKey="Hansen, S Ren B" sort="Hansen, S Ren B" uniqKey="Hansen S" first="S Ren B." last="Hansen">S Ren B. Hansen</name>
<name sortKey="Kim Vang" sort="Kim Vang" uniqKey="Kim Vang" last="Kim Vang">KIM VANG</name>
<name sortKey="Munk, Ole L" sort="Munk, Ole L" uniqKey="Munk O" first="Ole L." last="Munk">Ole L. Munk</name>
<name sortKey="Rodell, Anders" sort="Rodell, Anders" uniqKey="Rodell A" first="Anders" last="Rodell">Anders Rodell</name>
</country>
<country name="Allemagne">
<noRegion>
<name sortKey="Eggers, Carsten" sort="Eggers, Carsten" uniqKey="Eggers C" first="Carsten" last="Eggers">Carsten Eggers</name>
</noRegion>
<name sortKey="Heiss, Wolf Dieter" sort="Heiss, Wolf Dieter" uniqKey="Heiss W" first="Wolf-Dieter" last="Heiss">Wolf-Dieter Heiss</name>
<name sortKey="Hilker, Rudiger" sort="Hilker, Rudiger" uniqKey="Hilker R" first="Rüdiger" last="Hilker">Rüdiger Hilker</name>
</country>
<country name="Canada">
<noRegion>
<name sortKey="Chakravarty, Mallar" sort="Chakravarty, Mallar" uniqKey="Chakravarty M" first="Mallar" last="Chakravarty">Mallar Chakravarty</name>
</noRegion>
</country>
<country name="États-Unis">
<noRegion>
<name sortKey="Keator, David" sort="Keator, David" uniqKey="Keator D" first="David" last="Keator">David Keator</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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