Cited by 771Alzheimer's disease research and treatmentsBarrier Structure and Function StudiesNeuroinflammation and Neurodegeneration Mechanisms

apoE isoform–specific disruption of amyloid β peptide clearance from mouse brain

Open access
Deane, Rashid, Sagare, Abhay, Hamm, Katie, Parisi, Margaret, Lane, Steven, Finn, Mary Beth, Holtzman, David M., Zlokovic, Berislav V.·2008·Journal of Clinical Investigation

Abstract

Neurotoxic amyloid beta peptide (Abeta) accumulates in the brains of individuals with Alzheimer disease (AD). The APOE4 allele is a major risk factor for sporadic AD and has been associated with increased brain parenchymal and vascular amyloid burden. How apoE isoforms influence Abeta accumulation in the brain has, however, remained unclear. Here, we have shown that apoE disrupts Abeta clearance across the mouse blood-brain barrier (BBB) in an isoform-specific manner (specifically, apoE4 had a greater disruptive effect than either apoE3 or apoE2). Abeta binding to apoE4 redirected the rapid clearance of free Abeta40/42 from the LDL receptor-related protein 1 (LRP1) to the VLDL receptor (VLDLR), which internalized apoE4 and Abeta-apoE4 complexes at the BBB more slowly than LRP1. In contrast, apoE2 and apoE3 as well as Abeta-apoE2 and Abeta-apoE3 complexes were cleared at the BBB via both VLDLR and LRP1 at a substantially faster rate than Abeta-apoE4 complexes. Astrocyte-secreted lipo-apoE2, lipo-apoE3, and lipo-apoE4 as well as their complexes with Abeta were cleared at the BBB by mechanisms similar to those of their respective lipid-poor isoforms but at 2- to 3-fold slower rates. Thus, apoE isoforms differentially regulate Abeta clearance from the brain, and this might contribute to the effects of APOE genotype on the disease process in both individuals with AD and animal models of AD.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1172/jci36663

Cites

70 of 70 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Using homozygous human APOE knock-in mice, previous work demonstrated that APOE4 promotes Aβ aggregation and impairs its clearance relative to APOE3.

    “Using homozygous human APOE knock-in mice, previous work demonstrated that APOE4 promotes A β aggregation and impairs its clearance relative to APOE3 34,38,39 .”

    From APOE2 attenuates APOE4-associated amyloid pathology and related toxicity in a mouse model of Alzheimer’s disease (2026) · cites this paper as [39]

    The Abstract and Discussion report that apoE4 impairs Aβ clearance from mouse brain more than apoE3. The Introduction describes greater Aβ fibrillogenesis with apoE4 than apoE3, but cites earlier mouse-model studies for that finding; this paper does not demonstrate aggregation in homozygous human APOE knock-in mice. Its Methods describe clearance experiments in C57BL/6 mice and apoE protein prepared from astrocytes derived from knock-in mice. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • APOE exerts toxic effects on the cerebrovascular system and neurons and influences Aβ clearance, amyloid deposition, and tau-related neurodegeneration in an allele-dependent manner APOE4 > APOE3 > APOE2.

    “APOE exerts toxic effects on the cerebrovascular system (694) and neurons (383, 384) and influences A 𝛃 clearance (60, 64, 98, 135, 256, 266, 278, 294, 315, 693), amyloid deposition (39, 256, 258, 266, 278, 314, 518, 612), and tau-related neurodegeneration (533) in an allele-dependent manner APOE4 > APOE3 > APOE2 .”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [135]

    The Results report that apoE4 slows clearance across the mouse blood–brain barrier more than apoE3 or apoE2, and the Discussion describes isoform-dependent Aβ accumulation. The paper does not establish the claim’s strict APOE4 > APOE3 > APOE2 ordering for Aβ clearance: it groups apoE3 and apoE2 together. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Increased rate of soluble Aβ clearance across the BBB has been experimentally confirmed in the setting of the APOE ε2 allele.

    “In fact increased rate of soluble Aβ clearance across the BBB has been experimentally confirmed in the setting of the APOE ε2 allele [32, 48].”

    From APOE Genotype Differentially Modulates Effects of Anti-Aβ, Passive Immunization in APP Transgenic Mice (2017) · cites this paper as [48]

    The Results report faster BBB clearance of Aβ complexed with apoE2 than with apoE4 in mice. But apoE2 still reduced clearance relative to free Aβ: about 38% of lipid-poor apoE2–Aβ40 cleared at 90 minutes, versus more than 85% of free Aβ40. The experiment tested apoE isoforms and their Aβ complexes, not clearance in people carrying the APOE ε2 allele. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • LRP1 binds APOE2 and APOE3 as well as APOE2-Aβ and APOE3-Aβ complexes at the abluminal side of the blood-brain barrier, mediating their efflux from brain to blood.

    “LRP1 also binds APOE2 and APOE3 as well as APOE2-A 𝛃 and APOE3-A 𝛃 complexes at the abluminal side of the BBB, mediating their efflux from brain-toblood (135).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [135]

  • APOE4 compared with APOE3 and APOE2 diminishes Aβ clearance across the BBB.

    “Studies in animal models support that APOE4 compared with APOE3 and APOE2 diminishes A 𝛃 clearance across the BBB (58, 135), which has been confirmed in transgenic APOE4 mice (98).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [135]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

1 of the 71 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Deane, R., Sagare, A., Hamm, K., Parisi, M., Lane, S., Finn, M. B., Holtzman, D. M., & Zlokovic, B. V.
Affiliations
  • University of Rochester Medicine (US)
  • Washington University in St. Louis (US)
Venue
Journal of Clinical Investigation
Published
2008-12-01
Volume
118
Issue
12
Pages
4002-4013
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2138992210
Cited by
771
References
71
Citations by year
2026: 35 · 2025: 39 · 2024: 51 · 2023: 40 · 2022: 42 · 2021: 48 · 2020: 47 · 2019: 47 · 2018: 35 · 2017: 49 · 2016: 38 · 2015: 51 · 2014: 48 · 2013: 41 · 2012: 52
FWCI
24.44
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
Funders
  • National Institutes of Health (R37 NS34467, NS34467, AG13956, R37 AG13956)
  • National Institute on Aging (R37AG023084, R37AG13956, R37AG013956)
  • National Institute of Neurological Disorders and Stroke (R37NS034467, R37NS34467)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
APOE isoforms, APOE ε4, Alzheimer's disease, blood-brain barrier, LRP1, VLDLR, APOE2, APOE3, amyloid accumulation
MeSH terms
Alzheimer Disease, Animals, Astrocytes, Blood-Brain Barrier, Disease Models, Animal, Humans, Male, Receptors, LDL, Amyloid beta-Peptides, Protein Isoforms, Tumor Suppressor Proteins, Low Density Lipoprotein Receptor-Related Protein-1, Mice, Apolipoprotein E3, Apolipoprotein E4

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review