Cited by 32Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Human APOE genotype affects intraneuronal A 1-42 accumulation in a lentiviral gene transfer model

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Zhao, W., Dumanis, S. B., Tamboli, I. Y., Rodriguez, G. A., Jo LaDu, M., Moussa, C. E. H., William Rebeck, G.·2014·Human Molecular Genetics

Abstract

Intraneuronal accumulation of β-amyloid (Aβ)42 is one of the earliest pathological events in humans and in animal models of Alzheimer's disease (AD). Apolipoprotein E 4 (APOE4) is the major identified genetic risk factor for late-onset AD, with Aβ deposition beginning earlier in apoE4-positive subjects. To directly determine the effects of APOE genotype on intraneuronal accumulation of Aβ1-42 at the onset of AD pathogenesis, we introduced lentiviral Aβ1-42 into the cortex of APOE targeted replacement (TR) mice at the age of 8-9 months. We demonstrated a significant isoform-dependent effect of human APOE, with dramatically enhanced intracellular Aβ1-42 deposits in the cerebral cortex of APOE4-TR mice 2 weeks after injection. Double-immunofluorescent staining showed that intracellular accumulation of lentiviral Aβ1-42 was mainly present in neurons, localized to late endosomes/lysosomes. This intraneuronal accumulation of Aβ1-42 correlated with increased tau phosphorylation and cell death in the ipsilateral cortex around the injection site. Aβ1-42 was also observed in microglia, but not in astrocytes. Quantitative analysis revealed more neurons with Aβ1-42 while less microglia with Aβ1-42 nearest to the injection site of Aβ1-42 lentivirus in APOE4-TR mice. Finally, apoE was present in neurons of the ipsilateral cortex of APOE-TR mice at 2 weeks after lentivirus injection, in addition to astrocytes and microglia in both the ipsilateral and contralateral cerebral cortex. Taken together, these results demonstrate that apoE4 tips the balance of the glial and neuronal Aβ toward the intraneuronal accumulation of Aβ.

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  • Lentiviral expression of human APOE4 in AD mouse brain increases ISF-oAβ levels and aggravates plaque deposition, while APOE2 reduces Aβ accumulation.

    “Lentiviral expression of human APOE4 in AD mouse brain also increased ISF -oAβ levels and aggravated plaque deposition, while APOE2 was observed to reduce Aβ accumulation [457, 458].”

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Authors
Zhao, W., Dumanis, S. B., Tamboli, I. Y., Rodriguez, G. A., Jo LaDu, M., Moussa, C. E. H., & William Rebeck, G.
Affiliations
  • Shanghai Jiao Tong University (CN)
  • Georgetown University Medical Center (US)
Venue
Human Molecular Genetics
Published
2013-10-23
Volume
23
Issue
5
Pages
1365-1375
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2170589861
Cited by
32
References
61
Citations by year
2026: 1 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 6 · 2018: 3 · 2017: 1 · 2016: 4 · 2015: 4 · 2014: 6
FWCI
3.24
Type
journal article
Language
en
Open access
Locations
  • Human Molecular Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Georgetown University
  • China Scholarship Council
  • National Institutes of Health (IA 52242)
  • National Institute on Aging (P01AG030128, R01AG035379)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
apolipoprotein E, APOE ε4, amyloid-beta 42, Alzheimer's disease, lentiviral transduction, targeted replacement mice, tau phosphorylation, neuronal cell death, microglia, astrocytes
MeSH terms
Animals, Cerebral Cortex, Genetic Vectors, Genotype, Humans, Mice, Transgenic, Microinjections, Neurons, Protein Binding, Transduction, Genetic, Gene Expression, Lentivirus, Amyloid beta-Peptides, Microglia, Gene Transfer Techniques, Protein Transport, Intracellular Space, Mice, Apolipoprotein E4

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