Cited by 787Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration Mechanisms

The DOI matches its Crossref record; 43 of the 44 references it cites were found in a registry or an index.

Fibrillar amyloid-β burden in cognitively normal people at 3 levels of genetic risk for Alzheimer's disease

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Abstract

Fibrillar amyloid-beta (Aβ) is found in the brains of many cognitively normal older people. Whether or not this reflects a predisposition to Alzheimer's disease (AD) is unknown. We used Pittsburgh Compound B (PiB) PET to characterize the relationship between fibrillar Aβ burden and this predisposition in cognitively normal older people at 3 mean levels of genetic risk for AD. Dynamic PiB PET scans, the Logan method, statistical parametric mapping, and automatically labeled regions of interest (ROIs) were used to characterize and compare cerebral-to-cerebellar PIB distribution volume ratios, reflecting fibrillar Aβ burden, in 28 cognitively normal persons (mean age, 64 years) with a reported family history of AD and 2 copies, 1 copy, and no copies of the apolipoprotein E (APOE) ε4 allele. The 8 ε4 homozygotes, 8 heterozygotes, and 12 noncarriers did not differ significantly in terms of age, sex, or cognitive scores. Fibrillar Aβ was significantly associated with APOE ε4 carrier status and ε4 gene dose in AD-affected mean cortical, frontal, temporal, posterior cingulate-precuneus, parietal, and basal ganglia ROIs, and was highest in an additional homozygote who had recently developed mild cognitive impairment. These findings suggest that fibrillar Aβ burden in cognitively normal older people is associated with APOE ε4 gene dose, the major genetic risk factor for AD. Additional studies are needed to track fibrillar Aβ accumulation in persons with different kinds and levels of AD risk; to determine the extent to which fibrillar Aβ, alone or in combination with other biomarkers and risk factors, predicts rates of cognitive decline and conversion to clinical AD; and to establish the role of fibrillar Aβ imaging in primary prevention trials.

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Metadata

Authors
Reiman, E. M., Chen, K., Liu, X., Bandy, D., Yu, M., Lee, W., Ayutyanont, N., Keppler, J., Reeder, S. A., Langbaum, J. B. S., Alexander, G. E., Klunk, W. E., Mathis, C. A., Price, J. C., Aizenstein, H. J., DeKosky, S. T., & Caselli, R. J.
Affiliations
  • Translational Genomics Research Institute (US)
  • Banner - University Medical Center Phoenix (US)
  • University of Arizona (US)
  • Departments of iPsychiatry,
  • University of Pittsburgh (US)
  • Mayo Clinic in Arizona (US)
Venue
Proceedings of the National Academy of Sciences
Published
2009-04-21
Volume
106
Issue
16
Pages
6820-6825
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2171346860
Cited by
785
References
44
Citations by year
2026: 15 · 2025: 26 · 2024: 34 · 2023: 36 · 2022: 36 · 2021: 45 · 2020: 44 · 2019: 39 · 2018: 34 · 2017: 34 · 2016: 40 · 2015: 50 · 2014: 66 · 2013: 61 · 2012: 65
FWCI
45.56
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • McKnight Foundation
  • National Institute on Aging (R01AG025526, R01AG018402, P01AG025204, RF1AG025516, P50AG005133, R01AG031581, P30AG019610, R37AG025516)
  • National Institute of Mental Health (R01MH070729, R01MH057899)
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
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
fibrillar amyloid-beta, Alzheimer's disease, APOE ε4, genetic risk, cognitively normal older adults, Pittsburgh compound B PET, family history of Alzheimer's disease, mild cognitive impairment, primary prevention
MeSH terms
Aged, Alzheimer Disease, Brain Mapping, Cognition, Heterozygote, Homozygote, Humans, Magnetic Resonance Imaging, Middle Aged, Neuropsychological Tests, Amyloid beta-Peptides, Gene Dosage, Genetic Predisposition to Disease, Apolipoprotein E4

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