Journal
NATURE COMMUNICATIONS
Volume 13, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-28941-1
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Funding
- University of Pennsylvania Alzheimer's Disease Core Center grant (National Institute on Aging) [P30 AG072979]
- National Institutes of Health [NIH U01 AG024904]
- Department of Defense (DOD ADNI) [W81XWH-12-2-0012]
- National Institute on Aging
- National Institute of Biomedical Imaging and Bioengineering
- AbbVie
- Alzheimer's Association
- Alzheimer's Drug Discovery Foundation
- Araclon Biotech
- BioClinica, Inc.
- Biogen
- Bristol-Myers Squibb Company
- CereSpir, Inc.
- Cogstate
- Eisai Inc.
- Elan Pharmaceuticals, Inc.
- Eli Lilly and Company
- EuroImmun
- F. Hoffmann-La Roche Ltd
- Genentech, Inc.
- Fujirebio
- GE Healthcare
- IXICO Ltd.
- Janssen Alzheimer Immunotherapy Research & Development, LLC.
- Johnson & Johnson Pharmaceutical Research & Development LLC.
- Lumosity
- Lundbeck
- Merck Co., Inc.
- Meso Scale Diagnostics, LLC.
- NeuroRx Research
- Neurotrack Technologies
- Novartis Pharmaceuticals Corporation
- Pfizer Inc.
- Piramal Imaging
- Servier
- Takeda Pharmaceutical Company
- Transition Therapeutics
- Canadian Institutes of Health Research
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Through machine learning, heterogeneity in F-18-flortaucipir and F-18-fluorodeoxyglucose PET scans was assessed in 289 symptomatic AD patients, revealing distinct imaging signatures with pathobiological and prognostic implications for AD.
Alzheimer's disease (AD) is defined by amyloid (A) and tau (T) pathologies, with T better correlated to neurodegeneration (N). However, T and N have complex regional relationships in part related to non-AD factors that influence N. With machine learning, we assessed heterogeneity in F-18-flortaucipir vs. F-18-fluorodeoxyglucose positron emission tomography as markers of T and neuronal hypometabolism (N-M) in 289 symptomatic patients from the Alzheimer's Disease Neuroimaging Initiative. We identified six T/N-M clusters with differing limbic and cortical patterns. The canonical group was defined as the T/N-M pattern with lowest regression residuals. Groups resilient to T had less hypometabolism than expected relative to T and displayed better cognition than the canonical group. Groups susceptible to T had more hypometabolism than expected given T and exhibited worse cognitive decline, with imaging and clinical measures concordant with non-AD copathologies. Together, T/N-M mismatch reveals distinct imaging signatures with pathobiological and prognostic implications for AD.
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