Cited by 89Neuroscience and Neuropharmacology ResearchAlzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration Mechanisms

ApoE isoform-dependent changes in hippocampal synaptic function

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Korwek, Kimberly M, Trotter, Justin H, LaDu, Mary Jo, Sullivan, Patrick M, Weeber, Edwin J·2009·Molecular Neurodegeneration

Abstract

The lipoprotein receptor system in the hippocampus is intimately involved in the modulation of synaptic transmission and plasticity. The association of specific apoE isoform expression with human neurodegenerative disorders has focused attention on the role of these apoE isoforms in lipoprotein receptor-dependent synaptic modulation. In the present study, we used the apoE2, apoE3 and apoE4 targeted replacement (TR) mice along with recombinant human apoE isoforms to determine the role of apoE isoforms in hippocampus area CA1 synaptic function. While synaptic transmission is unaffected by apoE isoform, long-term potentiation (LTP) is significantly enhanced in apoE4 TR mice versus apoE2 TR mice. ApoE isoform-dependent differences in LTP induction require NMDA-receptor function, and apoE isoform expression alters activation of both ERK and JNK signal transduction. Acute application of specific apoE isoforms also alters LTP induction while decreasing NMDA-receptor mediated field potentials. Furthermore, acute apoE isoform application does not have the same effects on ERK and JNK activation. These findings demonstrate specific, isoform-dependent effects of human apoE isoforms on adult hippocampus synaptic plasticity and highlight mechanistic differences between chronic apoE isoform expression and acute apoE isoform exposure.

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Authors
Korwek, K. M., Trotter, J. H., LaDu, M. J., Sullivan, P. M., & Weeber, E. J.
Affiliations
  • Vanderbilt University (US)
  • University of South Florida (US)
  • University of Illinois Chicago (US)
  • Duke Medical Center (US)
Corresponding author
Weeber, Edwin J
Venue
Molecular Neurodegeneration
Published
2009-05-27
Volume
4
Issue
1
Pages
21-21
ISSN
1750-1326 (ISSN-L)
OpenAlex
W2078287327
Cited by
89
References
40
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 6 · 2022: 5 · 2021: 6 · 2020: 5 · 2019: 4 · 2018: 7 · 2017: 5 · 2016: 6 · 2015: 5 · 2014: 11 · 2013: 3 · 2012: 7
FWCI
2.63
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Neurodegeneration (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
National Institute on Aging (P01AG030128)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
apolipoprotein E isoforms, APOE ε4, APOE2, APOE3, hippocampal CA1, synaptic plasticity, long-term potentiation, NMDA receptor, ERK signaling, JNK signaling, synaptic transmission, targeted replacement mice, neurodegenerative diseases

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