Cited by 127Alzheimer's disease research and treatmentsEndoplasmic Reticulum Stress and DiseaseNeuroinflammation and Neurodegeneration Mechanisms

The E693Δ Mutation in Amyloid Precursor Protein Increases Intracellular Accumulation of Amyloid β Oligomers and Causes Endoplasmic Reticulum Stress-Induced Apoptosis in Cultured Cells

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Nishitsuji, Kazuchika, Tomiyama, Takami, Ishibashi, Kenichi, Ito, Kazuhiro, Teraoka, Rie, Lambert, Mary P., Klein, William L., Mori, Hiroshi·2009·The American Journal of Pathology

Abstract

The E693Delta mutation within the amyloid precursor protein (APP) has been suggested to cause dementia via the enhanced formation of synaptotoxic amyloid beta (Abeta) oligomers. However, this mutation markedly decreases Abeta secretion, implying the existence of an additional mechanism of neuronal dysfunction that is independent of extracellular Abeta. We therefore examined the effects of this mutation on both APP processing to produce Abeta as well as subcellular localization and accumulation of Abeta in transfected HEK293 and COS-7 cells. Both beta- and gamma-cleavage of mutant APP increased, indicating a lack of inhibition in Abeta production. Instead, this mutation promoted Abeta accumulation within cells, including the endoplasmic reticulum (ER), Golgi apparatus, early and late endosomes, lysosomes, and autophagosomes, all of which have been proposed as intracellular sites of Abeta generation and/or degradation, suggesting impairment of APP/Abeta trafficking. Notably, the intracellular mutant Abeta was found to predominantly form oligomers. Concomitant with this accumulation, the ER stress markers Grp78 and phosphorylated eIF2alpha were both strongly induced. Furthermore, the activation of caspase-4 and -3 as well as DNA fragmentation were detected in these cells. These results suggest that mutant Abeta induces alteration of Abeta trafficking and subsequent ER stress-induced apoptosis via enhancement of its intracellular oligomerization. Our findings suggest that Abeta oligomers exhibit toxicity in the extracellular space and within the cells themselves.

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Crossref · 10.2353/ajpath.2009.080480

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  • In the E693Delta APP mutation discovered in a Japanese kindred, the presence of intracellular oligomers is essentially identical in patients and in the transgenic mouse model.

    “In the E693Delta APP mutation discovered in a Japanese kindred (Nishitsuji et al., 2009), the presence of intracellular oligomers is essentially identical in patients and in the transgenic mouse model (Tomiyama et al., 2010).”

    From The Aβ oligomer hypothesis for synapse failure and memory loss in Alzheimer’s disease (2011) · cites this paper as Nishitsuji et al., 2009

  • FAD mutations can even decrease secretion of the most abundantly released Aβ isoform, Aβ40, while still increasing the Aβ42 to Aβ40 ratio.

    “FAD mutations can even decrease secretion of the most abundantly released Aβ isoform, Aβ40, while still increasing the Aβ42 to Aβ40 ratio [90, 134, 173].”
  • A recent E693Delta mutation in APP is associated with an AD clinical phenotype in the absence of plaques; cells harboring this mutation have reduced Aβ secretion and increased intracellular Aβ accumulation and oligomerization.

    “a recent E693Delta mutation in APP was reported to be associated with an AD clinical phenotype in the absence of plaques; cells harboring this mutation were shown to have reduced Aβ secretion and increased intracellular Aβ accumulation and oligomerization [134].”

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Research works printed but not linked: 2

  1. Mori C, Spooner ET, Wisniewsk KE, Wisniewski TM, Yamaguch H, Saido TC, Tolan DR, Selkoe DJ, Lemere CA: Intraneuronal A␤42 accumulation in Down syndrome brain. Amyloid 2002, 9:88 -102
  2. Murakami K, Irie K, Morimoto A, Ohigashi H, Shindo M, Nagao M, Shimizu T, Shirasawa T: Neurotoxicity and physicochemical proper- ties of A␤ mutant peptides from cerebral amyloid angiopathy. J Biol Chem 2003, 278:46179 -46187

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Authors
Nishitsuji, K., Tomiyama, T., Ishibashi, K., Ito, K., Teraoka, R., Lambert, M. P., Klein, W. L., & Mori, H.
Affiliations
  • Osaka City University (JP)
  • Northwestern University (US)
Corresponding author
Tomiyama, Takami
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2009-03
Volume
174
Issue
3
Pages
957-969
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2073593094
Cited by
127
References
64
Citations by year
2026: 1 · 2025: 5 · 2024: 7 · 2023: 6 · 2022: 5 · 2021: 3 · 2020: 10 · 2019: 4 · 2018: 9 · 2017: 7 · 2016: 4 · 2015: 12 · 2014: 8 · 2013: 13 · 2012: 7
FWCI
7.29
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ministry of Education, Culture, Sports, Science and Technology (17300114, 18023033, 20023026)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid precursor protein, amyloid-beta oligomers, endoplasmic reticulum stress, ER stress-induced apoptosis, APP processing, APP trafficking, Golgi apparatus, endosomes, lysosomes, autophagosomes, GRP78, eIF2α phosphorylation, caspase-3, caspase-4, DNA fragmentation, Alzheimer's disease
MeSH terms
Endoplasmic Reticulum Chaperone BiP, Serum Amyloid A Protein, Animals, Cell Line, Cells, Cultured, Chlorocebus aethiops, Dementia, Endoplasmic Reticulum, Humans, Kidney, Oligopeptides, Transfection, Apoptosis, Sequence Deletion, COS Cells

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