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Related Concept Videos

Peroxisomes01:24

Peroxisomes

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Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
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Peroxisomes and Mitochondria01:30

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Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
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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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Mitochondria01:37

Mitochondria

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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: Apr 10, 2026

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

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Redox interplay between mitochondria and peroxisomes.

Celien Lismont1, Marcus Nordgren1, Paul P Van Veldhoven1

  • 1Laboratory of Lipid Biochemistry and Protein Interactions, Department of Cellular and Molecular Medicine, KU Leuven - University of Leuven Leuven, Belgium.

Frontiers in Cell and Developmental Biology
|June 16, 2015
PubMed
Summary
This summary is machine-generated.

Mitochondria and peroxisomes, key organelles in cellular redox balance, cooperate in cell fate decisions. Understanding their redox interplay is crucial for insights into human diseases and oxidative stress responses.

Keywords:
antioxidant systemsinterorganellar cross-talkmitochondriaoxidative stressperoxisomespro-oxidant systemsredox signaling

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Physiology

Background:

  • Reduction-oxidation (redox) reactions are fundamental to cellular processes like gene expression and metabolism.
  • Mitochondria are established regulators of cellular redox signaling.
  • Peroxisomes also influence redox-linked physiological processes, cooperating with other organelles.

Purpose of the Study:

  • To provide a comprehensive overview of the redox interplay between mitochondria and peroxisomes in mammals.
  • To explore their cooperative roles in cell fate decisions.
  • To highlight the potential of 'omics' data mining for understanding inter-organelle redox signaling.

Main Methods:

  • Review of existing literature on mitochondrial and peroxisomal redox systems.
  • Critical analysis of emerging evidence on peroxisome-mitochondria interactions.
  • Exploration of data mining approaches using 'omics' datasets.

Main Results:

  • Both mitochondria and peroxisomes possess pro- and antioxidant systems that can act as redox signaling nodes.
  • Evidence suggests an intricate, redox-sensitive relationship and cooperation between peroxisomes and mitochondria in cell fate.
  • Data mining offers a powerful tool to uncover potential redox signaling pathways between these organelles.

Conclusions:

  • Mitochondria and peroxisomes share a complex redox relationship crucial for cellular functions and fate.
  • Further research is needed to elucidate how mitochondria integrate peroxisome-derived oxidative stress signals.
  • Clarifying these mechanisms may reveal new therapeutic targets for organelle-derived oxidative stress.