Cited by 151Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsCancer-related cognitive impairment studies

Alzheimer's Disease Neurodegenerative Biomarkers Are Associated with Decreased Cognitive Function but Not β-Amyloid in Cognitively Normal Older Individuals

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Wirth, Miranka, Madison, Cindee M., Rabinovici, Gil D., Oh, Hwamee, Landau, Susan M., Jagust, William J.·2013·The Journal of Neuroscience

Abstract

β-Amyloid (Aβ) plaque deposition and neurodegeneration within temporoparietal and hippocampal regions may indicate increased risk of Alzheimer's disease (AD). This study examined relationships between AD biomarkers of Aβ and neurodegeneration as well as cognitive performance in cognitively normal older individuals. Aβ burden was quantified in 72 normal older human subjects from the Berkeley Aging Cohort (BAC) using [11 C] Pittsburgh compound B (PIB) positron emission tomography. In the same individuals, we measured hippocampal volume, as well as glucose metabolism and cortical thickness, which were extracted from a template of cortical AD-affected regions. The three functional and structural biomarkers were merged into a highly AD-sensitive multimodality biomarker reflecting neural integrity. In the normal older individuals, there was no association between elevated PIB uptake and either the single-modality or the multimodality neurodegenerative biomarkers. Lower neural integrity within the AD-affected regions and a control area (the visual cortex) was related to lower scores on memory and executive function tests; the same association was not found with PIB retention. The relationship between cognition and the multimodality AD biomarker was stronger in individuals with the highest PIB uptake. The findings indicate that neurodegeneration occurs within AD regions regardless of Aβ deposition and accounts for worse cognition in cognitively normal older people. The impact of neural integrity on cognitive functions is, however, enhanced in the presence of high Aβ burden for brain regions that are most affected in AD.

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Crossref · 10.1523/jneurosci.4409-12.2013

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  • Measures of neurodegeneration or neuronal injury commonly used in AD research-MRI, FDG PET, and CSF total tau-are not specific for AD but are nonspecific indicators of damage that may derive from a variety of etiologies.

    “By contrast, additional research has highlighted the fact that measures of neurodegeneration or neuronal injury that are commonly used in AD research—magnetic resonance imaging (MRI), fluoro-deoxyglucose (FDG) PET, and CSF total tau (T-tau)—are not specific for AD but rather are nonspecific indicators of damage that may derive from a variety of etiologies, for example, cerebrovascular injury [29].”

    From NIA‐AA Research Framework: Toward a biological definition of Alzheimer's disease (2018) · cites this paper as [29]

    The Discussion (page unavailable) says neuronal damage in AD-target regions is nonspecific for amyloid pathology in cognitively normal older adults and may reflect aging or non-AD vascular pathology. The paper studies MRI-derived measures and FDG PET, but it does not establish the same claim for CSF total tau. Its finding is also narrower than saying these measures are nonspecific for AD itself. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • For many subjects with suspected AD or increased risk, what are currently considered downstream biomarker changes potentially precede upstream biomarker changes.

    “Our hypothesis, therefore, can accommodate a growing realization that for many subjects with suspected AD, or who have an increased risk of developing AD, what are currently considered downstream biomarker changes potentially precede upstream biomarker changes [206-213].”

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Research works printed but not linked: 3

  1. Delis DC Kramer JH Kaplan E Ober BA California Verbal Learning Test 2000 Second Edition San Antonio, TX Psychological Corporation
  2. McKhann G Drachman D Folstein M Katzman R Price D Stadlan EM Clinical diagnosis of Alzheimer's disease: report of the NINCDS-ADRDA Work Group under the auspices of Department of Health and Human Services Task Force on Alzheimer's Disease Neurology 1984 34 939 944 6610841
  3. Wechsler D Wechsler Memory Scale - Third edition. Manual 1997a San Antonio, TX The Psychological Corperation

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Authors
Wirth, M., Madison, C. M., Rabinovici, G. D., Oh, H., Landau, S. M., & Jagust, W. J.
Affiliations
  • University of California, Berkeley (US)
  • Lawrence Berkeley National Laboratory (US)
Venue
The Journal of Neuroscience
Published
2013-03-27
Volume
33
Issue
13
Pages
5553-5563
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2039421157
Cited by
151
References
75
Citations by year
2026: 3 · 2025: 9 · 2024: 1 · 2023: 5 · 2022: 9 · 2021: 10 · 2020: 8 · 2019: 15 · 2018: 8 · 2017: 12 · 2016: 19 · 2015: 17 · 2014: 20 · 2013: 15
FWCI
16.83
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by-nc-sa)
Funders
  • National Science Foundation (U01 AG024904)
  • Foundation for the National Institutes of Health (U01AG024904, Grant U01 AG024904, AG024904)
  • Alzheimer's Association (K23-AG031861, P50 AG023501, AG010129, NIRG-07-59422, U01 AG024904, P01-AG1972403)
  • Bristol-Myers Squibb (U01 AG024904, AG024904)
  • AstraZeneca
  • Biogen (U01 AG024904, AG024904)
  • Alzheimer's Disease Neuroimaging Initiative (U01AG024904, AG024904)
  • Amorfix Life Sciences
  • BioClinica (U01 AG024904, AG024904)
  • Northern California Institute for Research and Education (U01 AG024904)
  • John Douglas French Alzheimer's Foundation
  • Bayer HealthCare
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (131515)
  • Eisai (U01 AG024904, AG024904)
  • National Institutes of Health (3u01ag024904-10s2, AG023501, U01-AG024904, Grant U01 AG024904, AG010129, AG024904, AG034570)
  • University of California, Los Angeles
  • University of California, San Diego
  • University of California, San Francisco
  • Canadian Institutes of Health Research (U01 AG024904)
  • National Institute on Aging (U01-AG-024904, P30AG010129, AG1972403, P01 AG1972403, AG 024904, K01AG030514, AG010129, AG034570, AG023501, K23AG031861, R01AG034570, P50AG023501)
  • National Institute of Biomedical Imaging and Bioengineering (U01 AG024904, AG024904)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cancer-related cognitive impairment studies
Keywords
Alzheimer's disease, neurodegeneration, amyloid-beta, Pittsburgh compound B, cognitively normal older adults, hippocampal volume, cortical glucose metabolism, cortical thickness, neural integrity, memory, executive function, amyloid plaques
MeSH terms
Aged, Aged, 80 and over, Aging, Alzheimer Disease, Amyloid, Analysis of Variance, Aniline Compounds, Brain Mapping, Cognition Disorders, Female, Humans, Longitudinal Studies, Magnetic Resonance Imaging, Male, Mental Status Schedule, Middle Aged, Neuropsychological Tests, Radioisotopes, Thiazoles, Reproducibility of Results, Biomarkers, Linear Models, Fluorodeoxyglucose F18, Positron-Emission Tomography

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