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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 2/2024

09.10.2023 | Original Article

In vivo cerebral metabolic and dopaminergic characteristics in multiple system atrophy with orthostatic hypotension

verfasst von: Chenxi Xue, Xiaofeng Dou, Congcong Yu, Yan Zhong, Jing Wang, Xiang Zhang, Le Xue, Daoyan Hu, Shuang Wu, Hong Zhang, Mei Tian

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 2/2024

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Abstract

Purpose

Multiple system atrophy (MSA) is a rare neurodegenerative disease, often presented with orthostatic hypotension (OH), which is a disabling symptom but has not been very explored. Here, we investigated MSA patients with OH by using positron emission tomography (PET) with 18F-fluorodeoxyglucose (18F-FDG) and 11C-N-2-carbomethoxy-3-(4-fluorophenyl)-tropane (11C-CFT) for in vivo evaluation of the glucose metabolism and dopaminergic function of the brain.

Methods

Totally, 51 patients with MSA and 20 healthy controls (HC) who underwent 18F-FDG PET/CT were retrospectively enrolled, among which 24 patients also underwent 11C-CFT PET/CT. All patients were divided into MSA-OH(+) and MSA-OH(-) groups. Then, statistical parametric mapping (SPM) method was used to reveal the regional metabolic and dopaminergic characteristics of MSA-OH(+) compared with MSA-OH(-). Moreover, the metabolic networks of MSA-OH(+), MSA-OH(-) and HC groups were also constructed and analyzed based on graph theory to find possible network-level changes in MSA patients with OH.

Results

The SPM results showed significant hypometabolism in the pons and right cerebellar tonsil, as well as hypermetabolism in the left parahippocampal gyrus and left superior temporal gyrus in MSA-OH(+) compared with MSA-OH(-). A reduced 11C-CFT uptake in the left caudate was also shown in MSA-OH(+) compared with MSA-OH(-). In the network analysis, significantly reduced local efficiency and clustering coefficient were shown in MSA-OH(+) compared with HC, and decreased nodal centrality in the frontal gyrus was found in MSA-OH(+) compared with MSA-OH(-).

Conclusion

In this study, the changes in glucose metabolism in the pons, right cerebellar tonsil, left parahippocampal gyrus and left superior temporal gyrus were found closely related to OH in MSA patients. And the decreased presynaptic dopaminergic function in the left caudate may contribute to OH in MSA. Taken together, this study provided in vivo pathophysiologic information on MSA with OH from neuroimaging approach, which is essential for a better understanding of MSA with OH.
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Literatur
51.
Metadaten
Titel
In vivo cerebral metabolic and dopaminergic characteristics in multiple system atrophy with orthostatic hypotension
verfasst von
Chenxi Xue
Xiaofeng Dou
Congcong Yu
Yan Zhong
Jing Wang
Xiang Zhang
Le Xue
Daoyan Hu
Shuang Wu
Hong Zhang
Mei Tian
Publikationsdatum
09.10.2023
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 2/2024
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-023-06443-6

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