What question did this study set out to answer?

To determine how reactive oxygen species generated by the mitochondrial electron transport chain affect cytochrome c oxidase activity and membrane cardiolipin levels.

January 25, 2000FEBS LettersOpen Access

The effect of reactive oxygen species generated from the mitochondrial electron transport chain on the cytochrome c oxidase activity and on the cardiolipin content in bovine heart submitochondrial particles

View Full Paper

Ask AI

Bookmark

Authors

GPGiuseppe ParadiesOspedale Pediatrico Giovanni XXIII GPGiuseppe PetrosilloInstitute of Biomembranes, Bioenergetics and Molecular Biotechnologies MPMarilva PistoleseInstitute of Biomembranes, Bioenergetics and Molecular Biotechnologies

Discussion

Member takes

Implication

Experimental study demonstrates reactive oxygen species inhibit cytochrome c oxidase via cardiolipin peroxidation in bovine heart mitochondria, highlighting pathways of degenerative decay.

Key Points

To determine how reactive oxygen species generated by the mitochondrial electron transport chain affect cytochrome c oxidase activity and membrane cardiolipin levels.
Treated succinate-respiring bovine heart submitochondrial particles with antimycin A to stimulate respiratory chain-mediated reactive oxygen species generation.
Measured superoxide anion production via the epinephrine method in the presence and absence of superoxide dismutase and catalase.
Assessed cytochrome c oxidase activity and cardiolipin content after oxidative exposure, evaluating enzymatic recovery following the addition of native versus peroxidized cardiolipin.
Antimycin A-induced reactive oxygen species caused a marked loss of cytochrome c oxidase activity alongside a parallel depletion of cardiolipin, both of which were completely prevented by superoxide dismutase plus catalase.
Exogenous, unmodified cardiolipin almost completely restored the reactive oxygen species-induced deficit in cytochrome c oxidase activity, whereas peroxidized cardiolipin yielded no functional recovery.

Cite This Study

Paradies et al. (2000) studied this question.

synapsesocial.com/papers/6a910fe21a4f16208192d883 https://doi.org/10.1016/s0014-5793(00)01082-6

View Full Paper

Ask AI

Bookmark

Implication

Experimental study demonstrates reactive oxygen species inhibit cytochrome c oxidase via cardiolipin peroxidation in bovine heart mitochondria, highlighting pathways of degenerative decay.

The effect of reactive oxygen species generated from the mitochondrial electron transport chain on the cytochrome c oxidase activity and on the cardiolipin content in bovine heart submitochondrial particles

Discussion

Member takes

Implication

Key Points

Cite This Study

The effect of reactive oxygen species generated from the mitochondrial electron transport chain on the cytochrome c oxidase activity and on the cardiolipin content in bovine heart submitochondrial particles

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider