Cited by 220Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

ApoE4 Decreases Spine Density and Dendritic Complexity in Cortical Neurons In Vivo

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Dumanis, Sonya B., Tesoriero, Joseph A., Babus, Lenard W., Nguyen, Madeline T., Trotter, Justin H., Ladu, Mary Jo, Weeber, Edwin J., Turner, R. Scott +3 more·2009·The Journal of Neuroscience

Abstract

The three human alleles of apolipoprotein E (APOE) differentially influence outcome after CNS injury and affect one's risk of developing Alzheimer's disease (AD). It remains unclear how ApoE isoforms contribute to various AD-related pathological changes (e.g., amyloid plaques and synaptic and neuron loss). Here, we systematically examined whether apoE isoforms (E2, E3, E4) exhibit differential effects on dendritic spine density and morphology in APOE targeted replacement (TR) mice, which lack AD pathological changes. Using Golgi staining, we found age-dependent effects of APOE4 on spine density in the cortex. The APOE4 TR mice had significantly reduced spine density at three independent time points (4 weeks, 3 months, and 1 year, 27.7% ± 7.4%, 24.4% ± 8.6%, and 55.6% ± 10.5%, respectively) compared with APOE3 TR mice and APOE2 TR mice. Additionally, in APOE4 TR mice, shorter spines were evident compared with other APOE TR mice at 1 year. APOE2 TR mice exhibited longer spines as well as significantly increased apical dendritic arborization in the cortex compared with APOE4 and APOE3 TR mice at 4 weeks. However, there were no differences in spine density across APOE genotypes in hippocampus. These findings demonstrate that apoE isoforms differentially affect dendritic complexity and spine formation, suggesting a role for APOE genotypes not only in acute and chronic brain injuries including AD, but also in normal brain functions.

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Authors
Dumanis, S. B., Tesoriero, J. A., Babus, L. W., Nguyen, M. T., Trotter, J. H., Ladu, M. J., Weeber, E. J., Turner, R. S., Xu, B., Rebeck, G. W., & Hoe, H.-S.
Affiliations
  • Georgetown University Medical Center (US)
  • Georgetown University (US)
  • University of South Florida (US)
  • University of Illinois Chicago (US)
Corresponding author
Hoe, Hyang-Sook
Venue
The Journal of Neuroscience
Published
2009-12-02
Volume
29
Issue
48
Pages
15317-15322
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2167047846
Cited by
220
References
31
Citations by year
2026: 5 · 2025: 9 · 2024: 10 · 2023: 8 · 2022: 15 · 2021: 16 · 2020: 18 · 2019: 14 · 2018: 14 · 2017: 10 · 2016: 17 · 2015: 7 · 2014: 19 · 2013: 18 · 2012: 15
FWCI
8.84
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Howard Hughes Medical Institute
  • Georgetown University
  • National Institutes of Health
  • National Institute on Aging (R01AG026478, P01AG030128, R29AG014473, R03AG032330, R01AG014473, AG032330, AG026478, AG014473)
  • National Institute of Neurological Disorders and Stroke (R01NS050596)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
apolipoprotein E, APOE ε4, APOE isoforms, dendritic spine density, dendritic complexity, cortical neurons, hippocampus, Alzheimer's disease risk, synaptic plasticity
MeSH terms
Age Factors, Analysis of Variance, Animals, Cells, Cultured, Cerebral Cortex, Dendrites, Embryo, Mammalian, Hippocampus, Humans, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Silver Staining, Rats, Sprague-Dawley, Protein Isoforms, Dendritic Spines, Mice, Rats, Apolipoprotein E3, Apolipoprotein E4, Apolipoprotein E2

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