Cited by 128Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchDrug Transport and Resistance Mechanisms

ATP-binding cassette transporter A7 (ABCA7) loss of function alters Alzheimer amyloid processing

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Satoh, Kanayo, Abe-Dohmae, Sumiko, Yokoyama, Shinji, St George-Hyslop, Peter, Fraser, Paul E.·2015·Journal of Biological Chemistry

Abstract

The ATP-binding cassette transporter A7 (ABCA7) has been identified as a susceptibility factor of late onset Alzheimer disease in genome-wide association studies. ABCA7 has been shown to mediate phagocytosis and affect membrane trafficking. The current study examined the impact of ABCA7 loss of function on amyloid precursor protein (APP) processing and generation of amyloid-β (Aβ). Suppression of endogenous ABCA7 in several different cell lines resulted in increased β-secretase cleavage and elevated Aβ. ABCA7 knock-out mice displayed an increased production of endogenous murine amyloid Aβ42 species. Crossing ABCA7-deficient animals to an APP transgenic model resulted in significant increases in the soluble Aβ as compared with mice expressing normal levels of ABCA7. Only modest changes in the amount of insoluble Aβ and amyloid plaque densities were observed once the amyloid pathology was well developed, whereas Aβ deposition was enhanced in younger animals. In vitro studies indicated a more rapid endocytosis of APP in ABCA7 knock-out cells that is mechanistically consistent with the increased Aβ production. These in vitro and in vivo findings indicate a direct role of ABCA7 in amyloid processing that may be associated with its primary biological function to regulate endocytic pathways. Several potential loss-of-function ABCA7 mutations and deletions linked to Alzheimer disease that in some instances have a greater impact than apoE allelic variants have recently been identified. A reduction in ABCA7 expression or loss of function would be predicted to increase amyloid production and that may be a contributing factor in the associated Alzheimer disease susceptibility.

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Crossref · 10.1074/jbc.m115.655076

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  • ABCA7 underexpression induces faster APP endocytosis, increases Aβ production in vitro, and accelerates amyloid pathology in young transgenic mice.

    “ABCA7 underexpression induced faster APP endocytosis, consistent with increased Aβ production in vitro and accelerated the amyloid pathology in young transgenic mice [111].”
  • ABCA7 is involved in endocytosis and intracellular trafficking of APP.

    “ABCA7, an ATP-binding cassette transporter protein, is known to be involved in endocytosis and intracellular trafficking of APP [151].”

    From Genetic architecture of Alzheimer's disease (2020) · cites this paper as [151]

  • Suppression of ABCA7 led to increased β-secretase-mediated processing of APP and subsequent elevation of Aβ species.

    “Suppression of ABCA7 led to increased β-secretase-mediated processing of APP and subsequent elevation of Aβ species [151].”

    From Genetic architecture of Alzheimer's disease (2020) · cites this paper as [151]

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Authors
Satoh, K., Abe-Dohmae, S., Yokoyama, S., St George-Hyslop, P., & Fraser, P. E.
Affiliations
  • University of Toronto (CA)
  • Nagoya City University (JP)
  • Chubu University (JP)
Corresponding author
Satoh, Kanayo
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2015-10
Volume
290
Issue
40
Pages
24152-24165
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2194393752
Cited by
128
References
65
Citations by year
2026: 4 · 2025: 14 · 2024: 12 · 2023: 9 · 2022: 18 · 2021: 10 · 2020: 14 · 2019: 7 · 2018: 10 · 2017: 16 · 2016: 13 · 2015: 1
FWCI
9.72
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Canadian Institutes of Health Research (MOP-115056)
  • Japan Society for the Promotion of Science (21591164, 25461375)
  • Japan Health Sciences Foundation
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 › Oncology › Drug Transport and Resistance Mechanisms
Keywords
ABCA7, ABC transporters, Alzheimer's disease, amyloid-beta, APP processing, endocytosis, APP transgenic mice, amyloid plaques, loss-of-function mutations
MeSH terms
Alzheimer Disease, Animals, Disease Models, Animal, Female, Gene Expression Regulation, HeLa Cells, Humans, Male, Mice, Inbred C3H, Mice, Inbred C57BL, Mice, Transgenic, Mutation, Endosomes, Risk Factors, Amyloid beta-Peptides, Gene Deletion, Mice, Knockout, Disease Progression, ATP-Binding Cassette Transporters, RNA Interference, Cell Line, Tumor, Mice, Amyloid Precursor Protein Secretases, HEK293 Cells

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