Cited by 290Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Human and Murine ApoE Markedly Alters Aβ Metabolism before and after Plaque Formation in a Mouse Model of Alzheimer's Disease

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Fagan, Anne M., Watson, Melanie, Parsadanian, Maia, Bales, Kelly R., Paul, Steven M., Holtzman, David M.·2002·Neurobiology of Disease

Abstract

The epsilon4 allele of apolipoprotein E (apoE) is a risk factor for Alzheimer's disease (AD), perhaps through effects on amyloid-beta (Abeta) metabolism. Detailed analyses of various Abeta parameters in aging APP(V717F+/-) transgenic mice expressing mouse apoE, no apoE, or human apoE2, apoE3, or apoE4 demonstrate that apoE facilitates, but is not required for, Abeta fibril formation in vivo. Human apoE isoforms markedly delayed Abeta deposition relative to mouse apoE, with apoE2 (and apoE3 to a lesser extent) having a prolonged ability to prevent Abeta from converting into fibrillar forms. Isoform-specific effects of human apoE on Abeta levels and neuritic plaque formation mimicked that observed in AD (E4 > E3 > E2). Importantly, observation of an apoE-dependent decrease in percent soluble Abeta and enrichment of Abeta in membrane microdomains prior to Abeta deposition indicates that apoE influences Abeta metabolism early in the amyloidogenic process and provides a possible novel mechanism by which apoE affects AD pathogenesis.

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Crossref · 10.1006/nbdi.2002.0483

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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).”
  • mAPOE has been shown to have different effects on Aβ plaque metabolism and formation compared to human APOE.

    “However, mAPOE has been shown to have different effects on Aβ plaque metabolism and formation compared to human APOE [104, 105].”
  • The loss in binding is thought to contribute to a decrease in the clearance of Aβ and thus is part of the mechanism for the increased risk of apoE ɛ4 allele carriers to develop AD.

    “The loss in binding is thought to contribute to a decrease in the clearance of Aβ and thus is part of the mechanism for the increased risk of apoE ɛ4 allele carriers to develop AD [13–15].”
  • In several different Aβ plaque-depositing mice that are genetically engineered to express the human APOE isoforms instead of mouse APOE, APOE4 induces greater Aβ fibrillization and deposition in compact plaques relative to APOE3, whereas APOE2 markedly delays the onset and decreases the extent of Aβ plaque deposition.

    “In several different Aβ plaque-depositing mice that are genetically engineered to express the human APOE isoforms instead of mouse APOE (Box 3), APOE4 induces greater Aβ fibrillization and deposition in compact plaques relative to APOE3, whereas APOE2 markedly delays the onset and decreases the extent of Aβ plaque deposition117–120.”

    From Multifaceted roles of APOE in Alzheimer disease (2024) · cites this paper as [117]

  • Apoe knockout plaque-depositing mice still exhibit deposition of Aβ plaques, but the plaques are less compact and do not cause the synaptic and cognitive deficits typical of plaque-depositing mice with Apoe intact.

    “Apoe knockout plaque-depositing mice highlight the complexity of the APOE–Aβ interaction, as these mice still exhibit deposition of Aβ plaques, but the plaques are less compact and do not cause the synaptic and cognitive deficits typical of plaque-depositing mice with Apoe intact117,119,122.”

    From Multifaceted roles of APOE in Alzheimer disease (2024) · cites this paper as [117]

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Authors
Fagan, A. M., Watson, M., Parsadanian, M., Bales, K. R., Paul, S. M., & Holtzman, D. M.
Affiliations
  • Washington University in St. Louis (US)
  • Eli Lilly (United States) (US)
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2002-04
Volume
9
Issue
3
Pages
305-318
ISSN
0969-9961 (ISSN-L)
OpenAlex
W1991607389
Cited by
290
References
69
Citations by year
2026: 4 · 2025: 15 · 2024: 22 · 2023: 4 · 2022: 15 · 2021: 7 · 2020: 15 · 2019: 14 · 2018: 6 · 2017: 8 · 2016: 8 · 2015: 9 · 2014: 8 · 2013: 6 · 2012: 13
FWCI
10.81
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institute on Aging (AG11355, AG00861-01, AG05681-16, P50AG005681, AG13956, P01AG011355)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
apolipoprotein E, Alzheimer's disease, amyloid-beta metabolism, APOE ε4, APOE isoforms, APP transgenic mice, neuritic plaques, soluble amyloid-beta, lipid rafts, APOE2, APOE3
MeSH terms
Alzheimer Disease, Animals, Apolipoproteins E, Disease Models, Animal, Hippocampus, Humans, Mice, Transgenic, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Protein Isoforms, Mice, Plaque, Amyloid

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