Cited by 43Alzheimer's disease research and treatmentsCellular transport and secretionNeuroinflammation and Neurodegeneration Mechanisms

ApoE-isoform-dependent cellular uptake of amyloid-β is mediated by lipoprotein receptor LR11/SorLA

Yajima, Ryuji, Tokutake, Takayoshi, Koyama, Akihide, Kasuga, Kensaku, Tezuka, Toshiyuki, Nishizawa, Masatoyo, Ikeuchi, Takeshi·2015·Biochemical and Biophysical Research Communications

Abstract

The formation of senile plaques composed of β-amyloid (Aβ) in the brain is likely the initial event in Alzheimer's disease (AD). Possession of the APOE ε4 allele, the strong genetic factor for AD, facilitates the Aβ deposition from the presymptomatic stage of AD in a gene-dosage-dependent manner. However, the precise mechanism by which apoE isoforms differentially induce the AD pathology is largely unknown. LR11/SorLA is a type I membrane protein that functions as the neuronal lipoprotein endocytic receptor of apoE and the sorting receptor of the amyloid precursor protein (APP) to regulate amyloidogenesis. Recently, LR11/SorLA has been reported to be involved in the lysosomal targeting of extracellular amyloid-β (Aβ) through the binding of Aβ to the vacuolar protein sorting 10 (VPS10) protein domain of LR11/SorLA. Here, we attempted to examine the human-apoE-isoform-dependent effect on the cellular uptake of Aβ through the formation of a complex between an apoE isoform and LR11/SorLA. Cell culture experiments using Neuro2a cells revealed that the cellular uptake of secreted apoE3 and apoE4 was enhanced by the overexpression of LR11/SorLA. In contrast, the cellular uptake of apoE2 was not affected by the expression of LR11/SorLA. Co-immunoprecipitation assay revealed that apoE-isoform-dependent differences were observed in the formation of an apoE-LR11 complex (apoE4>apoE3>apoE2). ApoE-isoform-dependent differences in cellular uptake of FAM-labeled Aβ were further investigated…

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Crossref · 10.1016/j.bbrc.2014.11.111

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  • The cleavage of APP to Aβ in BACE-containing endosomes is exacerbated by the APOE E4 genotype.

    “APP can be cleaved to Aβ (Fig. 5, magenta) when it is trapped in endosomes that contain β-secretase (BACE)143, a process exacerbated by the APOE E4 genotype144,145.”

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Authors
Yajima, R., Tokutake, T., Koyama, A., Kasuga, K., Tezuka, T., Nishizawa, M., & Ikeuchi, T.
Affiliations
  • Brain Research Institute, Niigata University (JP)
  • Niigata University (JP)
Corresponding author
Ikeuchi, Takeshi
Venue
Biochemical and Biophysical Research Communications
Publisher
Elsevier BV
Published
2015-01
Volume
456
Issue
1
Pages
482-488
ISSN
0006-291X (ISSN-L)
OpenAlex
W2050638819
Cited by
43
References
8
Citations by year
2026: 1 · 2025: 3 · 2024: 5 · 2023: 9 · 2022: 7 · 2021: 1 · 2020: 5 · 2019: 5 · 2018: 2 · 2017: 1 · 2016: 1 · 2015: 3
FWCI
1.11
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical and Biophysical Research Communications (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Japan Society for the Promotion of Science (20372469, 23591234)
  • Ministry of Health, Labour and Welfare
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid-beta, APOE isoforms, cellular uptake, Alzheimer's disease, APOE ε4, APOE3, APOE2, lipoprotein receptors, N2a cells
MeSH terms
Alleles, Animals, Apolipoproteins E, Brain, Cloning, Molecular, Humans, Microscopy, Fluorescence, Oxygen, Receptors, LDL, Amyloid beta-Peptides, DNA, Complementary, Microscopy, Confocal, Coculture Techniques, Protein Isoforms, LDL-Receptor Related Proteins, Membrane Transport Proteins, Cell Line, Tumor, Mice, HEK293 Cells

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