Cited by 479Genetics, Aging, and Longevity in Model OrganismsRedox biology and oxidative stressAntioxidant Activity and Oxidative Stress

Oxidative stress and aberrant signaling in aging and cognitive decline

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Dröge, Wulf, Schipper, Hyman M.·2007·Aging Cell

Abstract

Summary: Brain aging is associated with a progressive imbalance between antioxidant defenses and intracellular concentrations of reactive oxygen species (ROS) as exemplified by increases in products of lipid peroxidation, protein oxidation, and DNA oxidation. Oxidative conditions cause not only structural damage but also changes in the set points of redox‐sensitive signaling processes including the insulin receptor signaling pathway. In the absence of insulin, the otherwise low insulin receptor signaling is strongly enhanced by oxidative conditions. Autophagic proteolysis and sirtuin activity, in turn, are downregulated by the insulin signaling pathway, and impaired autophagic activity has been associated with neurodegeneration. In genetic studies, impairment of insulin receptor signaling causes spectacular lifespan extension in nematodes, fruit flies, and mice. The predicted effects of age‐related oxidative stress on sirtuins and autophagic activity and the corresponding effects of antioxidants remain to be tested experimentally. However, several correlates of aging have been shown to be ameliorated by antioxidants. Oxidative damage to mitochondrial DNA and the electron transport chain, perturbations in brain iron and calcium homeostasis, and changes in plasma cysteine homeostasis may altogether represent causes and consequences of increased oxidative stress. Aging and cognitive decline thus appear to involve changes at multiple nodes within a complex regulatory network.

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Crossref · 10.1111/j.1474-9726.2007.00294.x

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Authors
Dröge, W., & Schipper, H. M.
Affiliations
Jewish General Hospital (CA)
Corresponding author
Dröge, Wulf
Venue
Aging Cell
Publisher
Wiley
Published
2007-03-27
Volume
6
Issue
3
Pages
361-370
ISSN
  • 1474-9718 (ISSN-L)
  • 1474-9726
OpenAlex
W1967874462
Cited by
479
References
150
Citations by year
2026: 3 · 2025: 7 · 2024: 10 · 2023: 14 · 2022: 10 · 2021: 23 · 2020: 21 · 2019: 20 · 2018: 29 · 2017: 29 · 2016: 28 · 2015: 30 · 2014: 13 · 2013: 27 · 2012: 33
FWCI
4.74
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
oxidative stress, brain aging, cognitive decline, reactive oxygen species, insulin receptor signaling, autophagy, sirtuins, antioxidants, neurodegeneration, mitochondrial DNA damage, iron homeostasis, calcium homeostasis, cysteine homeostasis, lifespan extension, lipid peroxidation, protein oxidation, DNA oxidation
MeSH terms
Aged, Aging, Antioxidants, Autophagy, Brain, Calcium, Cognition Disorders, Humans, Insulin, Oxidation-Reduction, Oxygen, Signal Transduction, Reactive Oxygen Species, Oxidative Stress, Sirtuins

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