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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 single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
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Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
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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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Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
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Related Experiment Video

Updated: May 1, 2026

Cellular Redox Profiling Using High-content Microscopy
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Circulating membrane-derived microvesicles in redox biology.

Michael Craig Larson1, Cheryl A Hillery2, Neil Hogg3

  • 1Department of Biophysics and Medical College of Wisconsin, Milwaukee, WI 53226, USA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI 53226, USA.

Free Radical Biology & Medicine
|April 23, 2014
PubMed
Summary

Microparticles (MVs) are cell fragments involved in redox signaling. These vesicles play roles in both normal cellular functions and disease processes, with ongoing research exploring their full impact.

Keywords:
Free radicalsMicroparticlesMicrovesiclesPathologyPhospholipidsRedox signaling

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Physiology

Background:

  • Microparticles or microvesicles (MVs) are shed from cells and carry signaling molecules, often related to redox processes.
  • The role of MVs in cellular redox signaling is increasingly recognized, aided by advances in flow cytometry.
  • MVs were once thought to be solely pathological but are now known to be vital in normal biological functions.

Purpose of the Study:

  • To explore the multifaceted roles of microparticles (MVs) in cellular redox signaling.
  • To highlight the growing understanding of MVs' involvement in both physiological and pathological processes.
  • To emphasize the significance of MVs in vascular biology and beyond.

Main Methods:

  • Review of recent studies on microparticle (MV) detection and function.
  • Analysis of MV involvement in angiogenesis, cancer progression, and cell-cell interactions.
  • Examination of MV roles in nitric oxide and free radical modulation.

Main Results:

  • Circulating MVs from platelets and endothelial cells promote angiogenesis.
  • Cancer-associated MVs alter the microenvironment, enhance invasion, and carry redox-regulated molecules.
  • MVs from various cells modulate cell interactions via nitric oxide and free radical scavenging/production.

Conclusions:

  • Microparticles (MVs) are crucial mediators of redox signaling with diverse roles in health and disease.
  • Further investigation into the biological and pathological functions of MVs is warranted.
  • The study of MVs in redox signaling represents a dynamic and expanding field of research.