Cited by 278Alzheimer's disease research and treatmentsIntracerebral and Subarachnoid Hemorrhage ResearchBarrier Structure and Function Studies

Human Apolipoprotein E4 Alters the Amyloid-β 40:42 Ratio and Promotes the Formation of Cerebral Amyloid Angiopathy in an Amyloid Precursor Protein Transgenic Model

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Fryer, John D., Simmons, Kelly, Parsadanian, Maia, Bales, Kelly R., Paul, Steven M., Sullivan, Patrick M., Holtzman, David M.·2005·The Journal of Neuroscience

Abstract

Alzheimer's disease (AD) is characterized by the aggregation and deposition of the normally soluble amyloid-β (Aβ) peptide in the extracellular spaces of the brain as parenchymal plaques and in the walls of cerebral vessels as cerebral amyloid angiopathy (CAA). CAA is a common cause of brain hemorrhage and is found in most patients with AD. As in AD, the ϵ4 allele of the apolipoprotein E (apoE) gene ( APOE ) is a risk factor for CAA. To determine the effect of human apoE on CAA in vivo , we bred human APOE3 and APOE4 “knock-in” mice to a transgenic mouse model (Tg2576) that develops amyloid plaques as well as CAA. The expression of both human apoE isoforms resulted in a delay in Aβ deposition of several months relative to murine apoE. Tg2576 mice expressing the more fibrillogenic murine apoE develop parenchymal amyloid plaques and CAA by 9 months of age. At 15 months of age, the expression of human apoE4 led to substantial CAA with very few parenchymal plaques, whereas the expression of human apoE3 resulted in almost no CAA or parenchymal plaques. Additionally, young apoE4-expressing mice had an elevated ratio of Aβ 40:42 in brain extracellular pools and a lower 40:42 ratio in CSF, suggesting that apoE4 results in altered clearance and transport of Aβ species within different brain compartments. These findings demonstrate that, once Aβ fibrillogenesis occurs, apoE4 favors the formation of CAA over parenchymal plaques and suggest that molecules or treatments that increase the ratio of Aβ 40:42 may favor the formation of CAA versus parenchymal plaques.

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Crossref · 10.1523/jneurosci.5170-04.2005

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  • Human apoE isoform-dependent differences in amyloid plaque deposition in APP-transgenic mice follow the pattern E4 > E3 > E2.

    “we and others have reported human apoE isoform-dependent differences in amyloid plaque deposition in APP-transgenic mice (E4 > E3 > E2) (10-14).”

    From Human ApoE isoforms differentially regulate brain amyloid-β peptide clearance (2011) · cites this paper as [13]

    The Results section and Figure 4 report greater parenchymal plaque deposition in 15-month-old APPsw mice expressing human apoE4 than in those expressing apoE3. The paper compares human apoE3 and apoE4, but does not test human apoE2, so it cannot establish the full E4 > E3 > E2 ranking. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • ApoE4 carriers have increased Aβ burden.

    “apoE4 carriers have increased A␤ burden (Beffert et al., 1999;Corder et al., 2004;Fryer et al., 2005).”

    From Impact of Apolipoprotein E (ApoE) Polymorphism on Brain ApoE Levels (2008) · cites this paper as Fryer et al., 2005

    The Discussion reports greater Aβ deposition in cerebral vessels of apoE4-expressing mice than apoE3-expressing mice, supporting increased burden in that model. It also says human APOE4 is associated with more cerebral amyloid angiopathy in patients with AD, but that parenchymal Aβ was independent of APOE genotype. The source therefore does not establish a general increase in Aβ burden among human apoE4 carriers. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • In APP transgenic mouse models, murine ApoE is associated with increased amyloid β plaques while ApoE4 is associated with increased CAA.

    “In APP transgenic mouse models, murine ApoE is associated with increased amyloid β plaques while ApoE4 is associated with increased CAA [32,33].”
  • APP/ε4 mice have increased CAA load.

    “In accordance to previously published data concerning ε4 allele effect, we found increased CAA load in APP/ε4 mice [25, 44–46].”
  • Expression of different isoforms of human ApoE in transgenic mice results in different levels of plaque and CAA burden with apoE4 expression enhancing amyloid deposition compared to apoE3 or apoE2.

    “This is further complicated by the fact that expression of different isoforms of human ApoE in transgenic mice results in different levels of plaque and CAA burden with apoE4 expression enhancing amyloid deposition compared to apoE3 or apoE2 [3, 21, 40, 59, 86, 178].”

    From Alzheimer's disease: experimental models and reality (2017) · cites this paper as [40]

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Authors
Fryer, J. D., Simmons, K., Parsadanian, M., Bales, K. R., Paul, S. M., Sullivan, P. M., & Holtzman, D. M.
Affiliations
  • Washington University in St. Louis (US)
  • Eli Lilly (United States) (US)
  • Duke University (US)
Venue
The Journal of Neuroscience
Published
2005-03-16
Volume
25
Issue
11
Pages
2803-2810
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2068394373
Cited by
278
References
49
Citations by year
2026: 6 · 2025: 10 · 2024: 8 · 2023: 11 · 2022: 6 · 2021: 10 · 2020: 10 · 2019: 14 · 2018: 9 · 2017: 21 · 2016: 14 · 2015: 15 · 2014: 23 · 2013: 8 · 2012: 17
FWCI
9.43
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)
Funders
  • National Institutes of Health (AG05681, AG13956, AG11355)
  • National Institute on Aging (R01AG013956, AG 05681, P50AG005681, R37AG013956, AG13956, P01AG011355)
  • National Institute of Neurological Disorders and Stroke (NS034467, R37NS034467, R01NS034467)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Neurology › Intracerebral and Subarachnoid Hemorrhage Research
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
Keywords
APOE ε4, cerebral amyloid angiopathy, Alzheimer's disease, Tg2576 mice, amyloid-beta clearance, cerebrospinal fluid amyloid-beta
MeSH terms
Alkenes, Alzheimer Disease, Animals, Apolipoproteins E, Benzoates, Blood Vessels, Disease Models, Animal, Enzyme-Linked Immunosorbent Assay, Gene Expression Regulation, Humans, Mice, Inbred C57BL, Mice, Transgenic, Peptide Fragments, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Cerebral Amyloid Angiopathy, Mice, Apolipoprotein E3, Apolipoprotein E4, Plaque, Amyloid

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