The Role of Oxidative Stress in Nervous System Aging

Catrina Sims-Robinson, Junguk Hur, John M. Hayes, Jacqueline R. Dauch, Peter J. Keller, Susan V. Brooks, Eva L. Feldman

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


While oxidative stress is implicated in aging, the impact of oxidative stress on aging in the peripheral nervous system is not well understood. To determine a potential mechanism for age-related deficits in the peripheral nervous system, we examined both functional and morphological changes and utilized microarray technology to compare normal aging in wild-type mice to effects in copper/zinc superoxide dismutase-deficient (Sod1-/-) mice, a mouse model of increased oxidative stress. Sod1-/- mice exhibit a peripheral neuropathy phenotype with normal sensory nerve function and deficits in motor nerve function. Our data indicate that a decrease in the synthesis of cholesterol, which is vital to myelin formation, correlates with the structural deficits in axons, myelin, and the cell body of motor neurons in the Sod1+/+ mice at 30 months and the Sod1-/- mice at 20 months compared with mice at 2 months. Collectively, we have demonstrated that the functional and morphological changes within the peripheral nervous system in our model of increased oxidative stress are manifested earlier and resemble the deficits observed during normal aging.

Original languageEnglish (US)
Article numbere68011
JournalPloS one
Issue number7
StatePublished - Jul 2 2013
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General


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