Cited by 46Hearing, Cochlea, Tinnitus, GeneticsRedox biology and oxidative stressAntioxidant Activity and Oxidative Stress

Age-Related Changes in Antioxidant Enzymes Related to Hydrogen Peroxide Metabolism in Rat Inner Ear

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Coling, Donald, Chen, Shan, Chi, Lai-Har, Jamesdaniel, Samson, Henderson, Donald·2009·Neuroscience Letters

Abstract

Oxidative stress is a pervasive factor in aging and has been implicated in noise-induced cochlear pathology. In this study, we measured the activities of two enzymes that catalyze the removal of hydrogen peroxide (H(2)O(2)), catalase and glutathione peroxidase (Gpx), in 3- and 24-month-old Fisher-344 rats, and reduced and oxidized glutathione in 3-, 12-, and 24-month-old rats. There was an increase in Gpx activity in vascular tissue (spiral ligament and stria vascularis), but no change in modiolar, sensory or vestibular tissue of the cochlea. The elevation in vascular tissue was age-related. We observed a significant elevation of catalase activity in vestibular tissue, a tendency for age-related elevation in the modiolus, but no change in vascular or sensory cochlear tissue. These findings suggest that increased Gpx activity in vascular cochlear tissue may be an age-related compensation for a decrease in glutathione and a decline in the redox state measured by the ratio of reduced to oxidized glutathione.

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Crossref · 10.1016/j.neulet.2009.08.015

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Authors
Coling, D., Chen, S., Chi, L.-H., Jamesdaniel, S., & Henderson, D.
Affiliations
University at Buffalo, State University of New York (US)
Corresponding author
Coling, Donald
Venue
Neuroscience Letters
Publisher
Elsevier BV
Published
2009-10
Volume
464
Issue
1
Pages
22-25
ISSN
0304-3940 (ISSN-L)
OpenAlex
W2063248210
Cited by
46
References
34
Citations by year
2026: 2 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 2 · 2020: 2 · 2019: 8 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 7 · 2014: 2 · 2013: 2 · 2012: 1
FWCI
1.13
Type
journal article
Language
en
Open access
Locations
  • Neuroscience Letters (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute on Deafness and Other Communication Disorders (R01DC006862)
Topics
  • Life Sciences › Neuroscience › Sensory Systems › Hearing, Cochlea, Tinnitus, Genetics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
age-related changes, antioxidant enzymes, hydrogen peroxide metabolism, catalase, glutathione peroxidase, oxidative stress, cochlea, spiral ligament, stria vascularis, glutathione redox state, F344 rats
MeSH terms
Aging, Animals, Catalase, Cochlea, Glutathione Peroxidase, Hydrogen Peroxide, Male, Oxidation-Reduction, Rats, Inbred F344, Stria Vascularis, Glutathione Disulfide, Rats, Spiral Ligament of Cochlea

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