Cited by 58Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Neuron Specific Toxicity of Oligomeric Amyloid-β: Role for JUN-Kinase and Oxidative Stress

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Ebenezer, Philip J., Weidner, Adam M., LeVine, Harry, Markesbery, William R., Murphy, M. Paul, Zhang, Le, Dasuri, Kalavathi, Fernandez-Kim, Sun Ok +3 more·2010·Journal of Alzheimer's Disease

Abstract

Recent studies have demonstrated a potential role for oligomeric forms of amyloid-β (Aβ) in the pathogenesis of Alzheimer's disease (AD), although it remains unclear which aspects of AD may be mediated by oligomeric Aβ. In the present study, we found that primary cultures of rat cortical neurons exhibit a dose-dependent increase in cell death following Aβ oligomer administration, while primary cultures of astrocytes exhibited no overt toxicity with even the highest concentrations of oligomer treatment. Neither cell type exhibited toxicity when treated by equal concentrations of monomeric Aβ. The neuron death induced by oligomer treatment was associated with an increase in reactive oxygen species (ROS), altered expression of mitochondrial fission and fusion proteins, and JUN kinase activation. Pharmacological inhibition of JUN kinase ameliorated oligomeric Aβ toxicity in neurons. These data indicate that oligomeric Aβ is sufficient to selectively induce toxicity in neurons, but not astrocytes, with neuron death occurring in a JUN kinase-dependent manner. Additionally, these observations implicate a role for oligomeric Aβ as a contributor to neuronal oxidative stress and mitochondrial disturbances in AD.

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Crossref · 10.3233/jad-2010-101161

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  • Mitochondrial Aβ levels correlate with abnormalities in mitochondrial structure and function.

    “Mitochondrial Aβ levels correlate with abnormalities in mitochondrial structure and function.”
  • Aβ accumulates in mitochondria in AD brain, accompanied by altered mitochondrial structure, decreased mitochondrial respiratory function and ATP production, impaired mitochondrial dynamics, and elevated mitochondria-associated oxidative stress.

    “Aβ accumulates in mitochondria in AD brain, which is accompanied by altered mitochondrial structure, decreased mitochondrial respiratory function and ATP production, impaired mitochondrial dynamics, and elevated mitochondria-associated oxidative stress.”

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Authors
Ebenezer, P. J., Weidner, A. M., LeVine, H., Markesbery, W. R., Murphy, M. P., Zhang, L., Dasuri, K., Fernandez-Kim, S. O., Bruce-Keller, A. J., Gavilán, E., & Keller, J. N.
Affiliations
  • Pennington Biomedical Research Center (US)
  • University of Kentucky (US)
  • Pennington Biomedical Research Center/Louisiana State University System, Baton Rouge, LA, USA
Venue
Journal of Alzheimer's Disease
Published
2010-11-25
Volume
22
Issue
3
Pages
839-848
ISSN
  • 1387-2877 (ISSN-L)
  • 1875-8908
OpenAlex
W1560950394
Cited by
58
References
1
Citations by year
2026: 5 · 2025: 5 · 2024: 5 · 2023: 3 · 2022: 1 · 2021: 3 · 2020: 3 · 2019: 3 · 2018: 3 · 2017: 4 · 2016: 2 · 2015: 3 · 2014: 4 · 2013: 4 · 2012: 6
FWCI
3.03
Type
journal article
Language
en
Open access
Locations
  • Journal of Alzheimer s Disease (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (P01AG005119)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK072476)
  • National Center for Research Resources (P20RR021945)
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
amyloid-beta oligomers, Alzheimer's disease
MeSH terms
Animals, Cells, Cultured, Neurons, Sulfonamides, Thiadiazoles, Amyloid beta-Peptides, Rats, Sprague-Dawley, Reactive Oxygen Species, Oxidative Stress, JNK Mitogen-Activated Protein Kinases, Rats

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