Cited by 836Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsCancer-related cognitive impairment studies

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Longitudinal assessment of Aβ and cognition in aging and Alzheimer disease

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Abstract

OBJECTIVE: Assess Aβ deposition longitudinally and explore its relationship with cognition and disease progression. METHODS: Clinical follow-up was obtained 20 ± 3 months after [¹¹C]Pittsburgh compound B (PiB)-positron emission tomography in 206 subjects: 35 with dementia of the Alzheimer type (DAT), 65 with mild cognitive impairment (MCI), and 106 age-matched healthy controls (HCs). A second PiB scan was obtained at follow-up in 185 subjects and a third scan after 3 years in 57. RESULTS: At baseline, 97% of DAT, 69% of MCI, and 31% of HC subjects showed high PiB retention. At 20-month follow-up, small but significant increases in PiB standardized uptake value ratios were observed in the DAT and MCI groups, and in HCs with high PiB retention at baseline (5.7%, 2.1%, and 1.5%, respectively). Increases were associated with the number of apolipoprotein E ε4 alleles. There was a weak correlation between PiB increases and decline in cognition when all groups were combined. Progression to DAT occurred in 67% of MCI with high PiB versus 5% of those with low PiB, but 20% of the low PiB MCI subjects progressed to other dementias. Of the high PiB HCs, 16% developed MCI or DAT by 20 months and 25% by 3 years. One low PiB HC developed MCI. INTERPRETATION: Aβ deposition increases slowly from cognitive normality to moderate severity DAT. Extensive Aβ deposition precedes cognitive impairment, and is associated with ApoE genotype and a higher risk of cognitive decline in HCs and progression from MCI to DAT over 1 to 2 years. However, cognitive decline is only weakly related to change in Aβ burden, suggesting that downstream factors have a more direct effect on symptom progression.

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Metadata

Authors
Villemagne, V. L., Pike, K. E., Chételat, G., Ellis, K. A., Mulligan, R. S., Bourgeat, P., Ackermann, U., Jones, G., Szoeke, C., Salvado, O., Martins, R., O'Keefe, G., Mathis, C. A., Klunk, W. E., Ames, D., Masters, C. L., & Rowe, C. C.
Affiliations
  • Mental Health Research Institute (AU)
  • Austin Health (AU)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
  • Australian e-Health Research Centre (AU)
  • Edith Cowan University (AU)
  • University of Pittsburgh (US)
  • National Ageing Research Institute (AU)
  • The University of Melbourne (AU)
Corresponding author
Villemagne, Victor L.
Venue
Annals of Neurology
Publisher
Wiley
Published
2011-01
Volume
69
Issue
1
Pages
181-192
ISSN
  • 0364-5134 (ISSN-L)
  • 1531-8249
OpenAlex
W2051489981
Cited by
833
References
42
Citations by year
2026: 28 · 2025: 32 · 2024: 26 · 2023: 51 · 2022: 42 · 2021: 44 · 2020: 57 · 2019: 60 · 2018: 57 · 2017: 57 · 2016: 60 · 2015: 61 · 2014: 68 · 2013: 86 · 2012: 71
FWCI
57.02
Type
journal article
Language
en
Open access
Locations
  • Annals of Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
  • Edith Cowan University Research Online (Edith Cowan University) (submittedVersion)
Funders
National Institute on Aging (P01AG025204, RF1AG025516, P50AG005133, R37AG025516)
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 › Oncology › Cancer-related cognitive impairment studies
Keywords
amyloid-beta deposition, Alzheimer's disease, mild cognitive impairment, Pittsburgh compound B PET, APOE ε4, cognitive decline, disease progression, aging
MeSH terms
Aged, Aging, Alzheimer Disease, Aniline Compounds, Brain, Cognition, Cognition Disorders, Female, Follow-Up Studies, Humans, Longitudinal Studies, Magnetic Resonance Imaging, Male, Neuropsychological Tests, Polymorphism, Genetic, Severity of Illness Index, Thiazoles, Amyloid beta-Peptides, Disease Progression, Positron-Emission Tomography, Plaque, Amyloid

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