Cited by 321Alzheimer's disease research and treatmentsMitochondrial Function and PathologyDementia and Cognitive Impairment Research

The DOI matches its Crossref record; 72 of the 73 references it cites were found in a registry or an index.

Lipid- and receptor-binding regions of apolipoprotein E4 fragments act in concert to cause mitochondrial dysfunction and neurotoxicity

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Chang, Shengjun, Ma, Tian ran, Miranda, R. Dennis, Balestra, Maureen E., Mahley, Robert W., Huang, Yadong·2005·Proceedings of the National Academy of Sciences

Abstract

Apolipoprotein (apo) E4, a 299-aa protein and a major risk factor for Alzheimer's disease, can be cleaved to generate C-terminal-truncated fragments that cause neurotoxicity in vitro and neurodegeneration and behavioral deficits in transgenic mice. To investigate this neurotoxicity, we expressed apoE4 with C- or N-terminal truncations or mutations in transfected Neuro-2a cells. ApoE4 (1-272) was neurotoxic, but full-length apoE4(1-299) and apoE4(1-240) were not, suggesting that the lipid-binding region (amino acids 241-272) mediates the neurotoxicity and that amino acids 273-299 are protective. A quadruple mutation in the lipid-binding region (I250A, F257A, W264R, and V269A) abolished the neurotoxicity of apoE4(1-272), and single mutations in the region of amino acids 273-299 (L279Q, K282A, or Q284A) made full-length apoE4 neurotoxic. Immunofluorescence staining showed that apoE4(1-272) formed filamentous inclusions containing phosphorylated tau in some cells and interacted with mitochondria in others, leading to mitochondrial dysfunction as determined by MitoTracker staining and flow cytometry. ApoE4(241-272) did not cause mitochondrial dysfunction or neurotoxicity, suggesting that the lipid-binding region alone is insufficient for neurotoxicity. Truncation of N-terminal sequences (amino acids 1-170) containing the receptor-binding region (amino acids 135-150) and triple mutations within that region (R142A, K146A, and R147A) abolished the mitochondrial interaction and neurotoxicity of apoE4(1-272). Further analysis showed that the receptor-binding region is required for escape from the secretory pathway and that the lipid-binding region mediates mitochondrial interaction. Thus, the lipid- and receptor-binding regions in apoE4 fragments act together to cause mitochondrial dysfunction and neurotoxicity, which may be important in Alzheimer's disease pathogenesis.

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  1. Wisniewski, T., Castaño, E. M., Golabek, A., Vogel, T. & Frangione, B. (1994) Am. J. Pathol. 145, 1030-1035.7977635

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Metadata

Authors
Chang, S., Ma, T. R., Miranda, R. D., Balestra, M. E., Mahley, R. W., & Huang, Y.
Affiliations
  • University of California, San Francisco (US)
  • Gladstone Institutes (US)
Venue
Proceedings of the National Academy of Sciences
Published
2005-12-12
Volume
102
Issue
51
Pages
18694-18699
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2022943683
Cited by
319
References
73
Citations by year
2026: 16 · 2025: 8 · 2024: 15 · 2023: 16 · 2022: 14 · 2021: 14 · 2020: 16 · 2019: 21 · 2018: 13 · 2017: 14 · 2016: 18 · 2015: 10 · 2014: 15 · 2013: 19 · 2012: 18
FWCI
7.62
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • GlaxoSmithKline
  • National Institutes of Health (AG‐022074)
  • National Institute on Aging (P01AG022074)
  • National Heart, Lung, and Blood Institute (R01 HL37063, R01HL037063)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
APOE ε4, neurotoxicity, mitochondrial dysfunction, receptor-binding region, Alzheimer's disease, tau phosphorylation, N2a cells, transgenic mice
MeSH terms
Alzheimer Disease, Animals, Apolipoproteins E, Cytoskeleton, Lipids, Mitochondria, Mutation, Neurons, Peptide Fragments, Receptors, Lipoprotein, Cell Line, Tumor, Mice, Apolipoprotein E4

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