Cited by 34Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

ApoE mimetic peptide decreases Aβ production in vitro and in vivo

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Minami, S Sakura, Cordova, Antoinette, Cirrito, John R, Tesoriero, Joseph A, Babus, Lenard W, Davis, Gary C, Dakshanamurthy, Sivanesan, Turner, R Scott +4 more·2010·Molecular Neurodegeneration

Abstract

Background: Apolipoprotein E (apoE) is postulated to affect brain Aβ levels through multiple mechanisms--by altering amyloid precursor protein (APP) processing, Aβ degradation, and Aβ clearance. We previously showed that an apoE-derived peptide containing a double repeat of the receptor-binding region was similarly effective in increasing APP processing in vivo. Here, we further examined whether peptides containing tandem repeats of the apoE receptor-binding region (amino acids 141-149) affected APP trafficking, APP processing, and Aβ production. Results: We found that peptides containing a double or triple tandem repeat of the apoE receptor-binding region, LRKLRKRLL, increased cell surface APP and decreased Aβ levels in PS1-overexpressing PS70 cells and in primary neurons. This effect was potentiated by a sequential increase in the number of apoE receptor-binding domain repeats (trimer > dimer > monomer). We previously showed that the apoE dimer increased APP CTF in vivo; to determine whether the dimer also affected secreted APP or Aβ levels, we performed a single hippocampal injection of the apoE dimer in wild-type mice and analyzed its effect on APP processing. We found increased sAPPα and decreased Aβ levels at 24 hrs after treatment, suggesting that the apoE dimer may increase α-secretase cleavage. Conclusions: These data suggest that small peptides consisting of tandem repeats of the apoE receptor-binding region are sufficient to alter APP trafficking and processing. The potency of these peptides increased with increasing repeats of the receptor binding domain of apoE. In addition, in vivo administration of the apoE peptide (dimer) increased sAPPα and decreased Aβ levels in wild-type mice. Overall, these findings contribute to our understanding of the effects of apoE on APP processing and Aβ production both in vitro and in vivo.

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Authors
Minami, S. S., Cordova, A., Cirrito, J. R., Tesoriero, J. A., Babus, L. W., Davis, G. C., Dakshanamurthy, S., Turner, R. S., Pak, D. T., Rebeck, G. W., Paige, M., & Hoe, H.-S.
Affiliations
  • Georgetown University (US)
  • Washington University in St. Louis (US)
  • Georgetown University Medical Center (US)
Corresponding author
  • Paige, Mikell
  • Hoe, Hyang-Sook
Venue
Molecular Neurodegeneration
Published
2010-04-20
Volume
5
Issue
1
Pages
16-16
ISSN
1750-1326 (ISSN-L)
OpenAlex
W2148252065
Cited by
34
References
34
Citations by year
2026: 1 · 2025: 4 · 2024: 3 · 2023: 1 · 2022: 5 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 2 · 2016: 1 · 2015: 1 · 2014: 5 · 2013: 1 · 2012: 2
FWCI
1.52
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Neurodegeneration (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • Georgetown University
  • National Institutes of Health
  • National Institute on Aging (R01AG026478, P01AG030128, R03AG034253)
  • National Cancer Institute (T32CA009686)
  • National Institute of Neurological Disorders and Stroke (R01NS048085)
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, amyloid-beta production, APP processing, APP trafficking, APP C-terminal fragments, Alzheimer's disease, hippocampal injection

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