Cited by 159Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsCancer-related cognitive impairment studies

Larger temporal volume in elderly with high versus low beta-amyloid deposition

Chételat, Gaël, Villemagne, Victor L., Pike, Kerryn E., Baron, Jean-Claude, Bourgeat, Pierrick, Jones, Gareth, Faux, Noel G., Ellis, Kathryn A. +6 more·2010·Brain

Abstract

β-Amyloid deposition is one of the main hallmarks of Alzheimer's disease thought to eventually cause neuronal death. Post-mortem and neuroimaging studies have consistently reported cases with documented normal cognition despite high β-amyloid burden. It is of great interest to understand what differentiates these particular subjects from those without β-amyloid deposition or with both β-amyloid deposition and cognitive deficits, i.e. what allows these subjects to resist the damage of the pathological lesions. [¹¹C]Pittsburgh compound B positron emission tomography and magnetic resonance brain scans were obtained in 149 participants including healthy controls and patients with subjective cognitive impairment, mild cognitive impairment and Alzheimer's disease. Magnetic resonance data were compared between high versus low-[11C]Pittsburgh compound B cases, and between high-[¹¹C]Pittsburgh compound B cases with versus those without cognitive deficits. Larger temporal (including hippocampal) grey matter volume, associated with better episodic memory performance, was found in high- versus low-[¹¹C]Pittsburgh compound B healthy controls. The same finding was obtained using different [¹¹C]Pittsburgh compound B thresholds, correcting [¹¹C]Pittsburgh compound B data for partial averaging, using age, education, Mini-Mental State Examination, apolipoprotein E4 and sex-matched subsamples, and using manual hippocampal delineation instead of voxel-based analysis. By contrast, in participants with subjective cognitive impairment, significant grey matter atrophy was found in high-[¹¹C]Pittsburgh compound B cases compared to low-[¹¹C]Pittsburgh compound B cases, as well as in high-[¹¹C]Pittsburgh compound B cases with subjective cognitive impairment, mild cognitive impairment and Alzheimer's disease compared to high-[¹¹C]Pittsburgh compound B healthy controls. Larger grey matter volume in high-[¹¹C]Pittsburgh compound B healthy controls may reflect either a tissue reactive response to β-amyloid or a combination of higher 'brain reserve' and under-representation of subjects with standard/low temporal volume in the high-[¹¹C]Pittsburgh compound B healthy controls. Our complementary analyses tend to support the latter hypotheses. Overall, our findings suggest that the deleterious effects of β-amyloid on cognition may be delayed in those subjects with larger brain (temporal) volume.

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Crossref · 10.1093/brain/awq187

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  • In participants with subjective cognitive decline, individuals with a higher level of amyloid deposition show significant gray matter atrophy compared with individuals with a low level of amyloid deposition.

    “A between-group analysis performed by Chetelat et al. indicated that, in participants with SCD, individuals with a higher level of amyloid deposition showed significant gray matter atrophy compared with individuals with a low level of amyloid deposition [180].”

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Authors
Chételat, G., Villemagne, V. L., Pike, K. E., Baron, J.-C., Bourgeat, P., Jones, G., Faux, N. G., Ellis, K. A., Salvado, O., Szoeke, C., Martins, R. N., Ames, D., Masters, C. L., & Rowe, C. C.
Affiliations
  • Inserm (FR)
  • Mental Health Research Institute (AU)
  • University of Cambridge (GB)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
  • Austin Health (AU)
  • The University of Melbourne (AU)
  • Edith Cowan University (AU)
  • National Ageing Research Institute (AU)
Venue
Brain
Published
2010-08-25
Volume
133
Issue
11
Pages
3349-3358
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2075668621
Cited by
159
References
41
Citations by year
2026: 6 · 2025: 9 · 2024: 8 · 2023: 6 · 2022: 5 · 2021: 10 · 2020: 10 · 2019: 11 · 2018: 13 · 2017: 13 · 2016: 8 · 2015: 8 · 2014: 15 · 2013: 17 · 2012: 8
FWCI
8.09
Type
journal article
Language
en
Open access
closed
Locations
  • Brain (publishedVersion)
  • PubMed (publishedVersion)
Funders
Commonwealth Scientific and Industrial Research Organisation
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
amyloid-beta deposition, Alzheimer's disease, hippocampal volume, brain reserve, gray matter atrophy, mild cognitive impairment, subjective cognitive impairment, episodic memory, 11C-Pittsburgh compound B, amyloid PET
MeSH terms
Age Factors, Aged, Aged, 80 and over, Alzheimer Disease, Apolipoproteins E, Female, Heterozygote, Humans, Male, Organ Size, Temporal Lobe, Cohort Studies, Amyloid beta-Peptides

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