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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...

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Related Experiment Video

Updated: May 12, 2026

Imaging of mtHyPer7, a Ratiometric Biosensor for Mitochondrial Peroxide, in Living Yeast Cells

Imaging of mtHyPer7, a Ratiometric Biosensor for Mitochondrial Peroxide, in Living Yeast Cells

Published on: June 2, 2023

Mitochondria, oxidative DNA damage, and aging.

R M Anson¹, V A Bohr

¹Laboratory of Molecular Genetics, National Institute on Aging, Baltimore, MD.

Journal of the American Aging Association

|April 23, 2013

Summary

This summary is machine-generated.

Mitochondrial oxidative damage, linked to aging, may be less critical than thought. New research suggests higher damage levels can be tolerated, and distribution within cells is key to understanding aging.

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Last Updated: May 12, 2026

Imaging of mtHyPer7, a Ratiometric Biosensor for Mitochondrial Peroxide, in Living Yeast Cells

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Published on: June 2, 2023

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Ratiometric Biosensors that Measure Mitochondrial Redox State and ATP in Living Yeast Cells

Ratiometric Biosensors that Measure Mitochondrial Redox State and ATP in Living Yeast Cells

Published on: July 22, 2013

Area of Science:

Gerontology
Mitochondrial Biology
Oxidative Stress Research

Background:

Reactive oxygen species (ROS) and mitochondrial damage are linked to longevity.
Mitochondrial DNA (mtDNA) damage, including deletions and 8-oxo-dG, increases with age, correlating with lifespan.
The sufficiency of oxidative damage in explaining senescence remains unclear.

Purpose of the Study:

To re-evaluate the role of mitochondrial oxidative damage in aging.
To investigate whether increased oxidative damage is sufficient to cause senescence.
To explore the distribution and repair of mtDNA damage in aging.

Main Methods:

Review of existing literature on mtDNA damage and aging.
Analysis of data from MnSOD -/+ mice regarding oxidative damage and aging phenotype.
Consideration of methodological challenges in measuring mitochondrial 8-oxo-dG levels.

Main Results:

Mitochondrial oxidative damage may be lower than previously estimated and higher levels are tolerated.
MnSOD -/+ mice show increased oxidative damage but no aging phenotype, challenging the direct link.
Previous high mitochondrial 8-oxo-dG levels may be due to methodological issues.

Conclusions:

Oxidative damage to mitochondria might play a lesser role in aging than previously assumed.
The distribution of damage within tissues and cells is crucial for understanding physiological consequences.
Further research is needed on DNA lesion incidence, repair variability, and damage distribution in aging.