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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 9/2019

14.06.2019 | Original Article

Brain metabolic patterns in patients with suspected non-Alzheimer’s pathophysiology (SNAP) and Alzheimer’s disease (AD): is [18F] FDG a specific biomarker in these patients?

verfasst von: Agostino Chiaravalloti, Gaetano Barbagallo, Alessandro Martorana, Anna Elisa Castellano, Francesco Ursini, Orazio Schillaci

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 9/2019

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Abstract

Purpose

The present study was conducted to compare the pattern of brain [18F] FDG uptake in suspected non-Alzheimer’s pathophysiology (SNAP), AD, and healthy controls using 2-deoxy-2-[18F]fluoroglucose ([18F] FDG) positron emission tomography imaging. Cerebrospinal fluid (CSF) biomarkers amyloid-β1-42 peptide (Aβ1-42) and tau were used in order to differentiate AD from SNAP.

Methods

The study included 43 newly diagnosed AD patients (female = 23; male = 20) according to the NINCDS-ADRDA criteria, 15 SNAP patients (female = 12; male =3), and a group of 34 healthy subjects that served as the control group (CG), who were found to be normal at neurological evaluation (male = 20; female = 14). A battery of neuropsychological tests was administrated in AD and SNAP subjects; cerebrospinal fluid assay was conducted in both AD and SNAP as well. Brain PET/CT acquisition was started 30 ± 5 min after [18F] FDG injection in all subjects. SPM12 [statistical parametric mapping] implemented in MATLAB 2018a was used for the analysis of PET scans in this study.

Results

As compared to SNAP, AD subjects showed significant hypometabolism in a wide cortical area involving the right frontal, parietal, and temporal lobes. As compared to CG, AD subjects showed a significant reduction in [18F] FDG uptake in the parietal, limbic, and frontal cortex, while a more limited reduction in [18F] FDG uptake in the same areas was found when comparing SNAP to CG.

Conclusions

SNAP subjects show milder impairment of brain [18F] FDG uptake as compared to AD. The partial overlap of the metabolic pattern between SNAP and AD limits the use of [18F] FDG PET/CT in effectively discriminating these clinical entities.
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Metadaten
Titel
Brain metabolic patterns in patients with suspected non-Alzheimer’s pathophysiology (SNAP) and Alzheimer’s disease (AD): is [18F] FDG a specific biomarker in these patients?
verfasst von
Agostino Chiaravalloti
Gaetano Barbagallo
Alessandro Martorana
Anna Elisa Castellano
Francesco Ursini
Orazio Schillaci
Publikationsdatum
14.06.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 9/2019
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-019-04379-4

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