Cited by 1,726Redox biology and oxidative stressAntioxidant Activity and Oxidative StressSulfur Compounds in Biology

Redefining Oxidative Stress

Jones, Dean P.·2006·Antioxidants & Redox Signaling

Abstract

Oxidative stress is often defined as an imbalance of pro-oxidants and antioxidants, which can be quantified in humans as the redox state of plasma GSH/GSSG. Plasma GSH redox in humans becomes oxidized with age, in response to oxidative stress (chemotherapy, smoking), and in common diseases (type 2 diabetes, cardiovascular disease). However, data also show that redox of plasma GSH/GSSG is not equilibrated with the larger plasma cysteine/cystine (Cys/CySS) pool, indicating that the "balance" of pro-oxidants and antioxidants cannot be defined by a single entity. The major cellular thiol/disulfide systems, including GSH/GSSG, thioredoxin- 1 (-SH(2)/-SS-), and Cys/CySS, are not in redox equilibrium and respond differently to chemical toxicants and physiologic stimuli. Individual signaling and control events occur through discrete redox pathways rather than through mechanisms that are directly responsive to a global thiol/disulfide balance such as that conceptualized in the common definition of oxidative stress. Thus, from a mechanistic standpoint, oxidative stress may be better defined as a disruption of redox signaling and control. Adoption of such a definition could redirect research to identify key perturbations of redox signaling and control and lead to new treatments for oxidative stress-related disease processes.

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Crossref · 10.1089/ars.2006.8.1865

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Authors
Jones, D. P.
Affiliations
Emory University (US)
Corresponding author
Jones, Dean P.
Venue
Antioxidants & Redox Signaling
Published
2006-09
Volume
8
Issue
9-10
Pages
1865-1879
ISSN
  • 1523-0864 (ISSN-L)
  • 1557-7716
OpenAlex
W1970240791
Cited by
1,726
References
66
Citations by year
2026: 94 · 2025: 51 · 2024: 84 · 2023: 92 · 2022: 96 · 2021: 109 · 2020: 97 · 2019: 87 · 2018: 100 · 2017: 87 · 2016: 105 · 2015: 90 · 2014: 109 · 2013: 89 · 2012: 109
FWCI
4.16
Type
journal article
Language
en
Open access
closed
Locations
  • Antioxidants and Redox Signaling (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Environmental Health Sciences (R01ES009047, R01-ES-09047, R01ES011195)
  • National Center for Research Resources (M01-RR00039, M01RR000039)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Sulfur Compounds in Biology
Keywords
oxidative stress, redox signaling, glutathione, glutathione disulfide, thioredoxin, thiol-disulfide balance, redox equilibria, redox regulation
MeSH terms
Animals, Cysteine, Cystine, Glutathione, Humans, Models, Biological, Oxidation-Reduction, Signal Transduction, Oxidative Stress, Glutathione Disulfide

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