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Related Concept Videos

Redox Reactions01:27

Redox Reactions

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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
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Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
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High-Resolution Fluoro-Respirometry of Equine Skeletal Muscle
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Redox Characterization of Functioning Skeletal Muscle.

Li Zuo1, Benjamin K Pannell2

  • 1Radiologic Sciences and Respiratory Therapy Division, School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine Columbus, OH, USA ; Interdisciplinary Biophysics Graduate Program, The Ohio State University Columbus, OH, USA.

Frontiers in Physiology
|December 5, 2015
PubMed
Summary

Reactive oxygen species (ROS) impact skeletal muscle function, aiding adaptation after exercise but causing damage in aging and disease. Further research is vital to understand ROS roles in muscle health and dysfunction.

Keywords:
atrophydiseaseoxidative stressredoxsignaling

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Area of Science:

  • Muscle physiology
  • Redox biology
  • Cellular signaling

Background:

  • Reactive oxygen species (ROS) are key regulators of skeletal muscle physiology.
  • ROS influence redox-sensitive pathways critical for gene expression and protein modification.
  • While implicated in muscle fatigue and dysfunction, ROS also promote muscle adaptation to exercise.

Purpose of the Study:

  • To provide a comprehensive review of redox signaling in skeletal muscle.
  • To discuss ROS-induced oxidative stress in aging and disease.
  • To highlight the role of mitochondria in ROS generation and susceptibility.

Main Methods:

  • Literature review of current research on redox signaling in skeletal muscle.
  • Analysis of ROS generation during muscular contractions.
  • Examination of ROS effects on mitochondrial function and muscle fibers.

Main Results:

  • Mitochondria are major ROS generators during muscle activity, making them vulnerable to oxidative stress.
  • ROS can alter mitochondrial membrane proteins, leading to cell death and swelling.
  • ROS contribute to muscle fiber necrosis and inflammation seen in diseases like Duchenne muscular dystrophy.

Conclusions:

  • Redox signaling via ROS is crucial for skeletal muscle function and adaptation.
  • Oxidative stress from ROS plays a role in muscle aging and disease pathogenesis.
  • Further investigation into ROS's precise role in normal and pathological muscle states is essential.