Cited by 1,601Mitochondrial Function and PathologyRedox biology and oxidative stressCoenzyme Q10 studies and effects

Generation of superoxide anion by the NADH dehydrogenase of bovine heart mitochondria

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Turrens, J F, Boveris, A·1980·Biochemical Journal

Abstract

Submitochondrial particles from bovine heart in which NADH dehydrogenase is reduced by either addition of NADH and rotenone or by reversed electron transfer generate 0.9 +/- 0.1 nmol of O2-/min per mg of protein at pH 7.4 and at 30 degrees C. When NADH is used as substrate, rotenone, antimycin and cyanide increase O2- production. In NADH- and antimycin-supplemented submitochondrial particles, rotenone has a biphasic effect: it increases O2- production at the NADH dehydrogenase and it inhibits O2- production at the ubiquinone-cytochrome b site. The generation of O2- by the rotenone, the uncoupler carbonyl cyanide rho-trifluoromethoxyphenylhydrazone and oligomycin at concentrations similar to those required to inhibit energy-dependent succinate-NAD reductase. Cyanide did not affect O2- generation at the NADH dehydrogenase, but inhibited O2- production at the ubiquinone-cytochrome b site. Production of O2- at the NADH dehydrogenase is about 50% of the O2- generation but the ubiquinone-cytochrome b area at pH 7.4. Additivity of the two mitochondrial sites of O2- generation was observed over the pH range from 7.0 to 8.8. AN O2–dependent autocatalytic process that requires NADH, submitochondrial particles and adrenaline is described.

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  • O2•− is one of the most important reactive oxygen species responsible for oxidative stress in bio-organisms and is generated as a by-product of the mitochondrial respiratory chain.

    “O2•− is one of the most important reactive oxygen species ROS responsible for oxidative stress in bio-organisms and is generated as a by-product of the mitochondrial respiratory chain [8].”

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Authors
Turrens, J. F., & Boveris, A.
Affiliations
Universidad de Buenos Aires (AR)
Venue
Biochemical Journal
Published
1980-11-01
Volume
191
Issue
2
Pages
421-427
ISSN
0264-6021 (ISSN-L)
OpenAlex
W2271272206
Cited by
1,601
References
29
Citations by year
2026: 10 · 2025: 13 · 2024: 11 · 2023: 15 · 2022: 24 · 2021: 23 · 2020: 24 · 2019: 30 · 2018: 46 · 2017: 37 · 2016: 43 · 2015: 47 · 2014: 47 · 2013: 53 · 2012: 58
FWCI
3.12
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Coenzyme Q10 studies and effects
Keywords
superoxide, NADH dehydrogenase, bovine heart mitochondria, rotenone, antimycin, uncoupling, oligomycin, cyanide, epinephrine, superoxide production, pH dependence
MeSH terms
Animals, Antimycin A, Cattle, Cyanides, Cytochrome Reductases, Hydrogen-Ion Concentration, Mitochondria, Heart, NADH Dehydrogenase, Oxygen, Rotenone, Submitochondrial Particles, Superoxides, In Vitro Techniques

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