Mitochondrial Superoxide

Mitochondrial superoxide is a reactive oxygen species generated within mitochondria and an important indicator of cellular redox balance, energy metabolism, and oxidative stress. It forms when electrons escaping the respiratory chain, particularly at complexes I and III, reduce molecular oxygen to superoxide; mitochondrial superoxide dismutase then converts much of it to hydrogen peroxide, which can participate in signaling or cause molecular damage. In bioengineering, measuring mitochondrial superoxide helps evaluate engineered cells, biomaterials, and therapeutic strategies that alter metabolism or protect mitochondrial function. These analyses support the design of more resilient cell systems and the study of disease-related oxidative injury.

Mitochondrial Superoxide - Related Videos

Research

JoVE Journal - Biology

Fluorescence-Based Quantification of Mitochondrial Membrane Potential and Superoxide Levels Using Live Imaging in HeLa Cells

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Cited by 1 •

2023

This technique describes an effective workflow to visualize and quantitatively measure mitochondrial membrane potential and superoxide levels within HeLa cells using fluorescence-based live imaging.

Alternative Methods for the Detection of Superoxide Anion Generation in Platelets

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2024

The generation of superoxide anion is essential for the stimulation of platelets and, if dysregulated, critical for thrombotic diseases. Here, we present three protocols for the selective detection of superoxide anions and the study of redox-dependent platelet regulation.

Confocal Imaging of Single Mitochondrial Superoxide Flashes in Intact Heart or In Vivo

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Cited by 10 •

2013

Confocal scanning microscopy is applied for imaging single mitochondrial events in perfused heart or skeletal muscles in live animal. Real-time monitoring of single mitochondrial processes such as superoxide flashes and membrane potential fluctuations enables the evaluation of mitochondrial function in a physiologically relevant context and during pathological perturbations.

Simultaneous Measurement of Superoxide/Hydrogen Peroxide and NADH Production by Flavin-containing Mitochondrial Dehydrogenases

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Cited by 9 •

2018

Mitochondria contain several flavin-dependent enzymes that can produce reactive oxygen species (ROS). Monitoring ROS release from individual sites in mitochondria is challenging due to unwanted side reactions. We present an easy, inexpensive method for direct assessment of native rates for ROS release using purified flavoenzymes and microplate fluorometry.

High-Resolution Respirometry to Assess Mitochondrial Function in Human Spermatozoa

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Cited by 2 •

2023

The analysis of sperm mitochondrial function by high-resolution respirometry permits the measurement of the oxygen consumption of freely moving spermatozoa in a closed-chamber system. The technique can be applied to measure respiration in human spermatozoa, which provides information on sperm mitochondrial characteristics and integrity.

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