Quantitative analysis of regional distribution of tau pathology with 11C-PBB3-PET in a clinical setting

2022 | journal article. A publication with affiliation to the University of Göttingen.

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​Quantitative analysis of regional distribution of tau pathology with 11C-PBB3-PET in a clinical setting​
Yousefzadeh-Nowshahr, E.; Winter, G.; Bohn, P.; Kneer, K.; von Arnim, C. A. F.; Otto, M. & Solbach, C. et al.​ (2022) 
PLoS One17(4) art. e0266906​.​ DOI: https://doi.org/10.1371/journal.pone.0266906 

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Authors Group
for the Alzheimer’s Disease Neuroimaging Initiative
The authors list is uncomplete:
Authors
Yousefzadeh-Nowshahr, Elham; Winter, Gordon; Bohn, Peter; Kneer, Katharina; von Arnim, Christine A. F.; Otto, Markus; Solbach, Christoph; Anderl-Straub, Sarah; Polivka, Dörte; Fissler, Patrick
Editors
Su, Yi
Abstract
Purpose The recent developments of tau-positron emission tomography (tau-PET) enable in vivo assessment of neuropathological tau aggregates. Among the tau-specific tracers, the application of 11 C-pyridinyl-butadienyl-benzothiazole 3 ( 11 C-PBB3) in PET shows high sensitivity to Alzheimer disease (AD)-related tau deposition. The current study investigates the regional tau load in patients within the AD continuum, biomarker-negative individuals (BN) and patients with suspected non-AD pathophysiology (SNAP) using 11 C-PBB3-PET. Materials and methods A total of 23 memory clinic outpatients with recent decline of episodic memory were examined using 11 C-PBB3-PET. Pittsburg compound B ( 11 C-PIB) PET was available for 17, 18 F-flurodeoxyglucose ( 18 F-FDG) PET for 16, and cerebrospinal fluid (CSF) protein levels for 11 patients. CSF biomarkers were considered abnormal based on Aβ 42 (< 600 ng/L) and t-tau (> 450 ng/L). The PET biomarkers were classified as positive or negative using statistical parametric mapping (SPM) analysis and visual assessment. Using the amyloid/tau/neurodegeneration (A/T/N) scheme, patients were grouped as within the AD continuum, SNAP, and BN based on amyloid and neurodegeneration status. The 11 C-PBB3 load detected by PET was compared among the groups using both atlas-based and voxel-wise analyses. Results Seven patients were identified as within the AD continuum, 10 SNAP and 6 BN. In voxel-wise analysis, significantly higher 11 C-PBB3 binding was observed in the AD continuum group compared to the BN patients in the cingulate gyrus, tempo-parieto-occipital junction and frontal lobe. Compared to the SNAP group, patients within the AD continuum had a considerably increased 11 C-PBB3 uptake in the posterior cingulate cortex. There was no significant difference between SNAP and BN groups. The atlas-based analysis supported the outcome of the voxel-wise quantification analysis. Conclusion Our results suggest that 11 C-PBB3-PET can effectively analyze regional tau load and has the potential to differentiate patients in the AD continuum group from the BN and SNAP group.
Purpose The recent developments of tau-positron emission tomography (tau-PET) enable in vivo assessment of neuropathological tau aggregates. Among the tau-specific tracers, the application of 11 C-pyridinyl-butadienyl-benzothiazole 3 ( 11 C-PBB3) in PET shows high sensitivity to Alzheimer disease (AD)-related tau deposition. The current study investigates the regional tau load in patients within the AD continuum, biomarker-negative individuals (BN) and patients with suspected non-AD pathophysiology (SNAP) using 11 C-PBB3-PET. Materials and methods A total of 23 memory clinic outpatients with recent decline of episodic memory were examined using 11 C-PBB3-PET. Pittsburg compound B ( 11 C-PIB) PET was available for 17, 18 F-flurodeoxyglucose ( 18 F-FDG) PET for 16, and cerebrospinal fluid (CSF) protein levels for 11 patients. CSF biomarkers were considered abnormal based on Aβ 42 (< 600 ng/L) and t-tau (> 450 ng/L). The PET biomarkers were classified as positive or negative using statistical parametric mapping (SPM) analysis and visual assessment. Using the amyloid/tau/neurodegeneration (A/T/N) scheme, patients were grouped as within the AD continuum, SNAP, and BN based on amyloid and neurodegeneration status. The 11 C-PBB3 load detected by PET was compared among the groups using both atlas-based and voxel-wise analyses. Results Seven patients were identified as within the AD continuum, 10 SNAP and 6 BN. In voxel-wise analysis, significantly higher 11 C-PBB3 binding was observed in the AD continuum group compared to the BN patients in the cingulate gyrus, tempo-parieto-occipital junction and frontal lobe. Compared to the SNAP group, patients within the AD continuum had a considerably increased 11 C-PBB3 uptake in the posterior cingulate cortex. There was no significant difference between SNAP and BN groups. The atlas-based analysis supported the outcome of the voxel-wise quantification analysis. Conclusion Our results suggest that 11 C-PBB3-PET can effectively analyze regional tau load and has the potential to differentiate patients in the AD continuum group from the BN and SNAP group.
Issue Date
2022
Journal
PLoS One 
eISSN
1932-6203
Language
English

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