Cited by 73Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchIntracerebral and Subarachnoid Hemorrhage Research

Patterns and severity of vascular amyloid in Alzheimer’s disease associated with duplications and missense mutations in APP gene, Down syndrome and sporadic Alzheimer’s disease

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Mann, David M. A., Davidson, Yvonne S., Robinson, Andrew C., Allen, Nancy, Hashimoto, Tadafumi, Richardson, Anna, Jones, Matthew, Snowden, Julie S. +6 more·2018·Acta Neuropathologica

Abstract

In this study, we have compared the severity of amyloid plaque formation and cerebral amyloid angiopathy (CAA), and the subtype pattern of CAA pathology itself, between APP genetic causes of AD ( APP dup, APP mutations), older individuals with Down syndrome (DS) showing the pathology of Alzheimer’s disease (AD) and individuals with sporadic (early and late onset) AD (sEOAD and sLOAD, respectively). The aim of this was to elucidate important group differences and to provide mechanistic insights related to clinical and neuropathological phenotypes. Since lipid and cholesterol metabolism is implicated in AD as well as vascular disease, we additionally aimed to explore the role of APOE genotype in CAA severity and subtypes. Plaque formation was greater in DS and missense APP mutations than in APP dup, sEOAD and sLOAD cases. Conversely, CAA was more severe in APP dup and missense APP mutations, and in DS, compared to sEOAD and sLOAD. When stratified by CAA subtype from 1 to 4, there were no differences in plaque scores between the groups, though in patients with APP dup, APP mutations and sEOAD, types 2 and 3 CAA were more common than type 1. Conversely, in DS, sLOAD and controls, type 1 CAA was more common than types 2 and 3. APOE ε4 allele frequency was greater in sEOAD and sLOAD compared to APP dup, missense APP mutations, DS and controls, and varied between each of the CAA phenotypes with APOE ε4 homozygosity being more commonly associated with type 3 CAA than types 1 and 2 CAA in sLOAD and sEOAD. The differing patterns in CAA within individuals of each group could be a reflection of variations in the efficiency of perivascular drainage, this being less effective in types 2 and 3 CAA leading to a greater burden of CAA in parenchymal arteries and capillaries. Alternatively, as suggested by immunostaining using carboxy-terminal specific antibodies, it may relate to the relative tissue burdens of the two major forms of Aβ, with higher levels of Aβ 40 promoting a more ‘aggressive’ form of CAA, and higher levels of Aβ 42(3) favouring a greater plaque burden. Possession of APOE ε4 allele, especially ε4 homozygosity, favours development of CAA generally, and as type 3 particularly, in sEOAD and sLOAD.

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  • Capillary CAA is linked to APOE4 and a variant (C766T (rs1799986)) in LRP-1, suggesting capillary CAA may represent a subtype of AD.

    “Capillary CAA is also linked to APOE4 and a variant (C766T (rs1799986)) in the LDL receptor related protein 1 (LRP-1), a receptor for apolipoproteins, which suggests that capillary CAA my also represent a subtype of AD [105, 106].”

    From The neuropathological diagnosis of Alzheimer's disease (2019) · cites this paper as [106]

    The Results (Effect of APOE genotype; page unavailable) report that APOE ε4 homozygosity was more common in type 3 CAA, a phenotype involving capillaries. The Discussion (page unavailable) cautions that APOE genotype did not greatly influence CAA phenotype overall. The paper does not establish the claimed link to LRP-1 C766T (rs1799986) or suggest that capillary CAA is a subtype of AD. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • People with DSAD have a significant burden of cerebral amyloid angiopathy (CAA), with more severe CAA found than in sporadic AD.

    “People with DSAD have a significant burden of cerebral amyloid angiopathy (CAA), with more severe CAA found than in sporadic AD [25, 40].”

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Authors
Mann, D. M. A., Davidson, Y. S., Robinson, A. C., Allen, N., Hashimoto, T., Richardson, A., Jones, M., Snowden, J. S., Pendleton, N., Potier, M.-C., Laquerrière, A., Prasher, V., Iwatsubo, T., & Strydom, A.
Affiliations
  • University of Manchester (GB)
  • The University of Tokyo (JP)
  • Salford Royal Hospital (GB)
  • Centre National de la Recherche Scientifique (FR)
  • Inserm (FR)
  • Birmingham Community Healthcare NHS Trust (GB)
Corresponding author
Mann, David M. A.
Venue
Acta Neuropathologica
Published
2018-05-16
Volume
136
Issue
4
Pages
569-587
ISSN
  • 0001-6322 (ISSN-L)
  • 1432-0533
OpenAlex
W2803318546
Cited by
73
References
51
Citations by year
2026: 5 · 2025: 9 · 2024: 8 · 2023: 8 · 2022: 10 · 2021: 11 · 2020: 15 · 2019: 6 · 2018: 1
FWCI
5.67
Type
journal article
Language
en
Open access
Locations
  • Acta Neuropathologica (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (publishedVersion, other-oa)
  • HAL (submittedVersion, cc-by)
  • Research Portal (King's College London) (submittedVersion, cc-by)
Funders
  • Wellcome Trust (098330/Z/12/Z)
  • Alzheimer's Society
  • Medical Research Council (MR/L022656/1)
  • Japan Society for the Promotion of Science (17H04193, 18K07364)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Neurology › Intracerebral and Subarachnoid Hemorrhage Research
Keywords
Alzheimer's disease, cerebral amyloid angiopathy, Down syndrome, amyloid plaques, APOE ε4, vascular amyloid
MeSH terms
Adult, Aged, Aged, 80 and over, Alzheimer Disease, Amyloid, Apolipoproteins E, Blood Vessels, Down Syndrome, Female, Gene Frequency, Genotype, Humans, Male, Middle Aged, Amyloid beta-Protein Precursor, Cerebral Amyloid Angiopathy, Mutation, Missense, Gene Duplication, Plaque, Amyloid

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