Cited by 5,084Mitochondrial Function and PathologyRedox biology and oxidative stressAntioxidant Activity and Oxidative Stress

Mitochondrial formation of reactive oxygen species

Open access
Turrens, J. F.·2003·The Journal of Physiology

Abstract

The reduction of oxygen to water proceeds via one electron at a time. In the mitochondrial respiratory chain, Complex IV (cytochrome oxidase) retains all partially reduced intermediates until full reduction is achieved. Other redox centres in the electron transport chain, however, may leak electrons to oxygen, partially reducing this molecule to superoxide anion (O(2)(−)•). Even though O(2)(−)• is not a strong oxidant, it is a precursor of most other reactive oxygen species, and it also becomes involved in the propagation of oxidative chain reactions. Despite the presence of various antioxidant defences, the mitochondrion appears to be the main intracellular source of these oxidants. This review describes the main mitochondrial sources of reactive species and the antioxidant defences that evolved to prevent oxidative damage in all the mitochondrial compartments. We also discuss various physiological and pathological scenarios resulting from an increased steady state concentration of mitochondrial oxidants.

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Crossref · 10.1113/jphysiol.2003.049478

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Authors
Turrens, J. F.
Affiliations
University of South Alabama (US)
Corresponding author
Turrens, J. F.
Venue
The Journal of Physiology
Publisher
Wiley
Published
2003-10-15
Volume
552
Issue
2
Pages
335-344
ISSN
0022-3751 (ISSN-L)
OpenAlex
W4247088117
Cited by
5,084
References
112
Citations by year
2026: 134 · 2025: 218 · 2024: 213 · 2023: 277 · 2022: 301 · 2021: 324 · 2020: 324 · 2019: 283 · 2018: 279 · 2017: 302 · 2016: 253 · 2015: 277 · 2014: 289 · 2013: 290 · 2012: 258
FWCI
25.45
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
reactive oxygen species, mitochondrial respiration, electron transport chain, superoxide, cytochrome c oxidase, electron leakage, antioxidant defense, oxidative damage
MeSH terms
Aging, Animals, Antioxidants, Humans, Mitochondria, Nitric Oxide, Oxygen, Superoxides, Xenobiotics, Apoptosis, Reactive Oxygen Species, Oxidative Stress

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