Cited by 56Alzheimer's disease research and treatmentsMitochondrial Function and PathologyCell death mechanisms and regulation

Endogenous oxidative stress in sporadic Alzheimer’s disease neuronal cybrids reduces viability by increasing apoptosis through pro-death signaling pathways and is mimicked by oxidant exposure of control cybrids

Open access
Onyango, Isaac G., Bennett, James P., Tuttle, Jeremy B.·2005·Neurobiology of Disease

Abstract

Although oxidative stress and mitochondrial dysfunction have been linked to neurodegenerative diseases such as Alzheimer's disease (AD), it is not fully understood how mitochondrial oxidative stress may induce neuronal death. We used mitochondrial transgenic neuronal cell cybrid models of sporadic AD (SAD) to investigate the effects of endogenously generated reactive oxygen species (ROS) on viability and cell death mechanisms. Compared to control (CTL) cybrids, SAD cybrids have increased accumulation of oxidative stress markers and increased apoptosis that is blocked by N-acetylcysteine (NAC) and zVAD.fmk. SAD cybrids also have increased basal activation of the MAPKs, Akt, and NF-kappa B. NF-kappa B activation and cybrid viability are enhanced by NAC. Inhibiting the activity of the PI3K pathway or NF-kappa B aggravates neuronal death. Exposure of CTL cybrids to H2O2 decreased viability and activated in a NAC-sensitive manner, the same intracellular signaling pathways active under basal conditions in SAD cybrids.

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Crossref · 10.1016/j.nbd.2005.01.026

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Authors
Onyango, I. G., Bennett, J. P., & Tuttle, J. B.
Affiliations
  • University of Virginia Medical Center (US)
  • University of Virginia (US)
Corresponding author
Onyango, Isaac G.
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2005-06
Volume
19
Issue
1-2
Pages
312-322
ISSN
0969-9961 (ISSN-L)
OpenAlex
W2008782167
Cited by
56
References
79
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2022: 3 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 4 · 2016: 2 · 2015: 3 · 2014: 3 · 2013: 4 · 2012: 5
FWCI
3.61
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (5r01ns039005-04)
  • National Institute on Aging (AG 14373, P01AG014373)
  • National Institute of Neurological Disorders and Stroke (NS39788, P50NS039788, NS39005)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
sporadic Alzheimer's disease, oxidative stress, mitochondrial dysfunction, neuronal apoptosis, reactive oxygen species, MAPK signaling, Akt signaling, NF-κB, PI3K signaling, N-acetylcysteine, hydrogen peroxide, neuronal viability, neurodegeneration
MeSH terms
Aged, Alzheimer Disease, Cell Survival, Humans, Neurons, Signal Transduction, Cerebral Amyloid Angiopathy, Oxidants, Cell Death, Apoptosis, Oxidative Stress, Cell Line, Tumor

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