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Comparison of multiple tau-PET measures as biomarkers in aging and Alzheimer's disease

Journal Article · · NeuroImage
 [1];  [2];  [3];  [2];  [2];  [4];  [5];  [5]
  1. Univ. of California, Berkeley, CA (United States); German Center for Neurodegenerative Diseases, Magdeburg (Germany)
  2. Univ. of California, Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Univ. of California, San Francisco, CA (United States)
  5. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, San Francisco, CA (United States)
The recent development of tau-specific positron emission tomography (PET) tracers enables in vivo quantification of regional tau pathology, one of the key lesions in Alzheimer's disease (AD). Tau PET imaging may become a useful biomarker for clinical diagnosis and tracking of disease progression but there is no consensus yet on how tau PET signal is best quantified. The goal of the current paper was to evaluate multiple whole-brain and region-specific approaches to detect clinically relevant tau PET signal. Two independent cohorts of cognitively normal adults and amyloid-positive (Aβ+) patients with mild cognitive impairment (MCI) or AD-dementia underwent [18F]AV-1451 PET. Methods for tau tracer quantification included: (i) in vivo Braak staging, (ii) regional uptake in Braak composite regions, (iii) several whole-brain measures of tracer uptake, (iv) regional uptake in AD-vulnerable voxels, and (v) uptake in a priori defined regions. Receiver operating curves characterized accuracy in distinguishing Aβ- controls from AD/MCI patients and yielded tau positivity cutoffs. Clinical relevance of tau PET measures was assessed by regressions against cognition and MR imaging measures. Key tracer uptake patterns were identified by a factor analysis and voxel-wise contrasts. Braak staging, global and region-specific tau measures yielded similar diagnostic accuracies, which differed between cohorts. While all tau measures were related to amyloid and global cognition, memory and hippocampal/entorhinal volume/thickness were associated with regional tracer retention in the medial temporal lobe. Key regions of tau accumulation included medial temporal and inferior/middle temporal regions, retrosplenial cortex, and banks of the superior temporal sulcus. Finally, our data indicate that whole-brain tau PET measures might be adequate biomarkers to detect AD-related tau pathology. However, regional measures covering AD-vulnerable regions may increase sensitivity to early tau PET signal, atrophy and memory decline.
Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Univ. of California, San Francisco, CA (United States)
Sponsoring Organization:
National Inst. of Health (NIH) (United States); USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1393249
Journal Information:
NeuroImage, Journal Name: NeuroImage Vol. 157; ISSN 1053-8119
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (22)

Discovery and preclinical characterization of [18F]PI-2620, a next-generation tau PET tracer for the assessment of tau pathology in Alzheimer’s disease and other tauopathies journal July 2019
Topographic staging of tau positron emission tomography images journal January 2018
European Ultrahigh‐Field Imaging Network for Neurodegenerative Diseases (EUFIND) journal July 2019
NIA-AA Research Framework: Toward a biological definition of Alzheimer's disease journal April 2018
Distinct tau PET patterns in atrophy‐defined subtypes of Alzheimer's disease journal January 2020
Prediction of fast decline in amyloid positive mild cognitive impairment patients using multimodal biomarkers journal January 2019
Modelling prognostic trajectories of cognitive decline due to Alzheimer's disease journal January 2020
Alzheimer's disease drug development pipeline: 2018 journal January 2018
Tau PET imaging in neurodegenerative tauopathies—still a challenge journal January 2019
Tau deposition is associated with functional isolation of the hippocampus in aging journal October 2019
Functional brain architecture is associated with the rate of tau accumulation in Alzheimer’s disease journal January 2020
Longitudinal tau PET in ageing and Alzheimer’s disease journal March 2018
Neuroanatomical spread of amyloid β and tau in Alzheimer’s disease: implications for primary prevention journal January 2020
Is tau in the absence of amyloid on the Alzheimer’s continuum?: A study of discordant PET positivity journal December 2019
Neuroimaging Biomarkers for Alzheimer’s Disease journal June 2019
Data-driven prognostic features of cognitive trajectories in patients with amnestic mild cognitive impairments journal January 2019
A walk through tau therapeutic strategies. text January 2019
Dissociation of Tau Deposits and Brain Atrophy in Early Alzheimer’s Disease: A Combined Positron Emission Tomography/Magnetic Resonance Imaging Study journal July 2018
Quantitative 18F-AV1451 Brain Tau PET Imaging in Cognitively Normal Older Adults, Mild Cognitive Impairment, and Alzheimer's Disease Patients journal May 2019
Disrupted Functional Connectivity of Cornu Ammonis Subregions in Amnestic Mild Cognitive Impairment: A Longitudinal Resting-State fMRI Study journal October 2018
Audiovisual Lexical Retrieval Deficits Following Left Hemisphere Stroke journal November 2018
Cortical tau deposition follows patterns of entorhinal functional connectivity in aging journal September 2019

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