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Tau-positron emission tomography correlates with neuropathology findings.
Open accessAbstract
INTRODUCTION: Comparison of tau (flortaucipir) positron emission tomography (FTP-PET) to autopsy is important to demonstrate the relationship of FTP-PET to neuropathologic findings. METHODS: Autopsies were performed on 26 participants who had antemortem FTP-PET. FTP-PET standardized uptake value ratios (SUVRs) were compared to autopsy diagnoses and Braak tangle stage. Quantitative tau burden was compared to regional FTP-PET signal. RESULTS: Participants with Braak stages of IV or greater had elevated FTP-PET signal. FTP-PET was elevated in participants with Alzheimer's disease. An FTP-PET SUVR cut point of 1.29 was determined to be optimal. Quantitative measurements of hippocampal and temporal lobe tau burden were highly correlated to FTP-PET signal (rho's from 0.61 to 0.70, P ≤ .02). DISCUSSION: Elevated FTP-PET reflects Braak IV or greater neuropathology. Participants with primary age-related tauopathy and hippocampal sclerosis did not show elevated FTP-PET signal. Secondary neuropathologic diagnoses of Alzheimer's disease neuropathologic change can lead to borderline elevated FTP-PET signal.
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“Studies combining antemortem imaging with neuropathological validation have shown that 18F-flortaucipir PET is highly sensitive for presence of high levels of AD neuropathological change with visual rating positivity corresponding to Braak levels IV or greater [184, 185].”
From The use of neuroimaging techniques in the early and differential diagnosis of dementia (2023) · cites this paper as [185]
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“In support of this finding and the quantitative data presented herein, a recent study of 26 cases comparing flortaucipir PET image and autopsy findings demonstrated a sensitivity of 87% and specificity of 82% for identifying AD-spectrum pathological diagnoses, using quantitative analysis of a mesial, inferior, or middle temporal lobe region of interest.25”
From Positron Emission Tomography Imaging With [ 18 F]flortaucipir and Postmortem Assessment of Alzheimer Disease Neuropathologic Changes (2020) · cites this paper as [25]
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“Studies comparing antemortem tau PET imaging with autopsy have begun assessing the ability of flortaucipir to detect underlying NFTs in AD and non-AD dementias.25,26,27,28,29,30,31,32,33”
From Positron Emission Tomography Imaging With [ 18 F]flortaucipir and Postmortem Assessment of Alzheimer Disease Neuropathologic Changes (2020) · cites this paper as [25]
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“Twelve of these autopsy-confirmed cases had pathological evidence of Braak stages IV to VI NFTs (2 cases with Braak stage IV) with moderate to frequent neuritic plaques and were above the SUVR threshold for positivity for the [18F]flortaucipir temporal lobe region of interest.”
From Positron Emission Tomography Imaging With [ 18 F]flortaucipir and Postmortem Assessment of Alzheimer Disease Neuropathologic Changes (2020) · cites this paper as [25]
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Metadata
- Authors
- Lowe, V. J., Lundt, E. S., Albertson, S. M., Min, H., Fang, P., Przybelski, S. A., Senjem, M. L., Schwarz, C. G., Kantarci, K., Boeve, B., Jones, D. T., Reichard, R. R., Tranovich, J. F., Hanna Al‐Shaikh, F. S., Knopman, D. S., Jack, C. R., Dickson, D. W., Petersen, R. C., & Murray, M. E.
- Affiliations
- Mayo Clinic (US)
- Department of Neuroscience Mayo Clinic Jacksonville FL USA
- Corresponding author
- Lowe, Val J.
- Murray, Melissa E.
- ORCID
- Venue
- Alzheimer's & Dementia
- Publisher
- Wiley
- Published
- 2020-01-04
- Volume
- 16
- Issue
- 3
- Pages
- 561-571
- ISSN
- 1552-5260 (ISSN-L)
- 1552-5279
- PMC
- PMC7067654
- OpenAlex
- W2991594523
- Cited by
- 203
- References
- 44
- Citations by year
- 2026: 26 · 2025: 37 · 2024: 28 · 2023: 30 · 2022: 33 · 2021: 30 · 2020: 18
- FWCI
- 15.87
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Alzheimer s & Dementia (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health (P50 AG016574, R01 NS89757, R01 NS089544, R01 DC10367, R01 AG011378, R01 AG041851, R01 AG034676, R01 AG054449, R01 NS097495, U01 AG006786, R21 NS094489)
- Robert Wood Johnson Foundation
- Mayo Foundation for Medical Education and Research
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Medical Imaging Techniques and Applications
- Keywords
- tau PET, flortaucipir
- MeSH terms
- Aged, Aged, 80 and over, Alzheimer Disease, Autopsy, Brain, Female, Humans, Male, tau Proteins, Positron-Emission Tomography
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