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Regional correlations between [ 11 C]PIB PET and post-mortem burden of amyloid-beta pathology in a diverse neuropathological cohort

Journal Article · · NeuroImage: Clinical
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [8];  [9];  [10];  [8];  [11];  [2]
  1. University of California, San Francisco (United States). Memory and Aging Center, Department of Neurology; University of California, Berkeley (United States). Helen Wills Neuroscience Institute; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Sungkyunkwan University School of Medicine (Republic of Korea). Departments of Neurology, Samsung Medical Center; DOE/OSTI
  2. University of California, San Francisco (United States). Memory and Aging Center, Department of Neurology; University of California, Berkeley (United States). Helen Wills Neuroscience Institute; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. University of California, San Francisco (United States). Memory and Aging Center, Department of Neurology; University of California, San Francisco (United States). Department of Pathology
  4. University of California, Berkeley (United States). Helen Wills Neuroscience Institute; McGill University, Montreal (Canada). Department of Psychiatry
  5. University of California, San Francisco (United States). Memory and Aging Center, Department of Neurology; University College London, London (United Kingdom). Dementia Research Centre
  6. National Institutes of Health, Bethesda, MD (United States). Center for Scientific Review; University of California, Davis (United States). Department of Neurology, School of Medicine
  7. University of California, Davis (United States). Department of Neurology, School of Medicine
  8. University of California, San Francisco (United States). Memory and Aging Center, Department of Neurology
  9. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  10. University of California, Davis (United States). Department of Pathology and Laboratory Medicine
  11. University of California, San Francisco (United States). Memory and Aging Center, Department of Neurology; University of California, Berkeley (United States). Helen Wills Neuroscience Institute; University of California, San Francisco (United States). Department of Pathology

Imaging-pathological correlation studies show that in vivo amyloid-β (Aβ) positron emission tomography (PET) strongly predicts the presence of significant Aβ pathology at autopsy. We sought to determine whether regional PiB-PET uptake would improve sensitivity for amyloid detection in comparison with global measures (experiment 1), and to estimate the relative contributions of different Aβ aggregates to in vivo PET signal (experiment 2). In experiment 1, 54 subjects with [11C] PiB-PET during life and postmortem neuropathologic examination (85.2% with dementia, interval from PET to autopsy 3.1 ± 1.9 years) were included. We assessed Thal amyloid phase (N = 36) and CERAD score (N = 54) versus both global and regional PiB SUVRs. In experiment 2 (N = 42), PiB SUVR and post-mortem amyloid β burden was analyzed in five customized regions of interest matching regions sampled at autopsy. We assessed the relative contribution of neuritic plaques (NPs), diffuse plaques (DPs) and cerebral amyloid angiopathy (CAA) to regional PIB SUVR using multi-linear regression. In experiment 1, there were no differences in Area Under the Curve for amyloid phase ≥ A2 and CERAD score ≥ C2 between global and highest regional PiB SUVR (p = 0.186 and 0.230). In experiment 2, when NPs, DPs, and/or CAA were included in the same model, moderate to severe NPs were independently correlated with PiB SUVR in all regions except for the inferior temporal and calcarine ROI (β = 0.414–0.804, p < 0.05), whereas DPs were independently correlated with PiB SUVR in the angular gyrus ROI (β = 0.446, p = 0.010). CAA was also associated with PiB SUVR in the inferior temporal and calcarine ROI (β = 0.222–0.355, p < 0.05). In conclusion, global PiB-PET SUVR performed as well as regional values for amyloid detection in our cohort. The substrate-specific binding of PiB might differ among the brain specific regions.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1623706
Journal Information:
NeuroImage: Clinical, Journal Name: NeuroImage: Clinical Journal Issue: C Vol. 13; ISSN 2213-1582
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Classification and Visualization of Alzheimer’s Disease using Volumetric Convolutional Neural Network and Transfer Learning journal December 2019
The emerging role of PET imaging in dementia journal January 2017
Classification of Alzheimer's Disease, Mild Cognitive Impairment, and Cognitively Unimpaired Individuals Using Multi-feature Kernel Discriminant Dictionary Learning journal January 2018
Subcortical amyloid load is associated with shape and volume in cognitively normal individuals journal May 2019
Amyloid involvement in subcortical regions predicts cognitive decline journal July 2018
Clinical significance of amyloid β positivity in patients with probable cerebral amyloid angiopathy markers journal April 2019
2018 Alzheimer's disease facts and figures journal January 2018
NIA-AA Research Framework: Toward a biological definition of Alzheimer's disease journal April 2018
Multisite study of the relationships between antemortem [ 11 C]PIB-PET Centiloid values and postmortem measures of Alzheimer's disease neuropathology journal October 2018
Multimodal imaging Gd-nanoparticles functionalized with Pittsburgh compound B or a nanobody for amyloid plaques targeting journal July 2017

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