Cited by 703Mitochondrial Function and PathologyRedox biology and oxidative stressCancer and biochemical research

Role of uncoupled and non-coupled oxidations in maintenance of safely low levels of oxygen and its one-electron reductants

Skulachev, Vladimir P.·1996·Quarterly Reviews of Biophysics

Abstract

To proceed at a high rate, phosphorylating respiration requires ADP to be available. In the resting state, when the energy consumption is low, the ADP concentration decreases so that phosphorylating respiration ceases. This may result in an increase in the intracellular concentrations of O 2 as well as of one-electron O 2 reductants such as These two events should dramatically enhance non-enzymatic formation of reactive oxygen species, i.e. of, and OHׁ, and, hence, the probability of oxidative damage to cellular components. In this paper, a concept is put forward proposing that non-phosphorylating (uncoupled or non-coupled) respiration takes part in maintenance of low levels of both O 2 and the O 2 reductants when phosphorylating respiration fails to do this job due to lack of ADP. In particular, it is proposed that some increase in the H+leak of mitochondrial membrane in State 4 lowers, stimulates O 2 consumption and decreases the level of which otherwise accumulates and serves as one-electron O 2 reductant. In this connection, the role of natural uncouplers (thyroid hormones), recouplers (male sex hormones and progesterone), non-specific pore in the inner mitochondrial membrane, and apoptosis, as well as of non-coupled electron transfer chains in plants and bacteria will be considered.

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Crossref · 10.1017/s0033583500005795

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Authors
Skulachev, V. P.
Affiliations
Lomonosov Moscow State University (RU)
Corresponding author
Skulachev, Vladimir P.
Venue
Quarterly Reviews of Biophysics
Published
1996-05
Volume
29
Issue
2
Pages
169-202
ISSN
  • 0033-5835 (ISSN-L)
  • 1469-8994
OpenAlex
W1987981231
Cited by
703
References
157
Citations by year
2026: 2 · 2025: 7 · 2024: 14 · 2023: 15 · 2022: 15 · 2021: 18 · 2020: 23 · 2019: 13 · 2018: 12 · 2017: 19 · 2016: 11 · 2015: 19 · 2014: 36 · 2013: 22 · 2012: 31
FWCI
2.56
Type
journal article
Language
en
Open access
closed
Locations
  • Quarterly Reviews of Biophysics (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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer and biochemical research
Keywords
uncoupled respiration, reactive oxygen species, mitochondrial proton leak, state 4 respiration, thyroid hormones, androgens, progesterone, apoptosis, oxidative damage
MeSH terms
Animals, Bacteria, Electron Transport, Mitochondria, Oxidation-Reduction, Oxygen, Oxygen Consumption, Plants, Progesterone, Superoxides, Testosterone, Thyroid Hormones

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