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Related Concept Videos

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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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In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
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Antioxidant Microgels Support Peroxide-Challenged Hepatic Cells.

Isabella Nymann Westensee1, Karen Louise Thomsen2, Rajeshwar Prosad Mookerjee3

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Researchers developed antioxidant artificial cells using platinum nanoparticles and an EUK compound. These cells protect hepatic cells from oxidative stress by removing harmful peroxides, showing potential for cell support.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Nanotechnology

Background:

  • Cellular stress from reactive oxygen species (ROS) presents a significant therapeutic challenge.
  • Developing effective strategies to mitigate ROS-induced damage is crucial for maintaining cell viability.

Purpose of the Study:

  • To create antioxidant artificial cells capable of neutralizing extracellular peroxides.
  • To evaluate the efficacy of these artificial cells in protecting hepatic cells from oxidative stress.

Main Methods:

  • Assembly of antioxidant artificial cells using alginate hydrogels.
  • Incorporation of non-native catalysts: platinum nanoparticles and an EUK compound.
  • Assessment of intracellular ROS levels and cell viability in challenged hepatic cells.

Main Results:

  • Artificial cells successfully preserved the viability of challenged hepatic cells.
  • Intracellular ROS levels were significantly lowered in treated cells.
  • Extracellular peroxide removal by the artificial cells was confirmed.

Conclusions:

  • Antioxidant artificial cells demonstrate a promising strategy for combating cellular oxidative stress.
  • This approach shows potential for the long-term support of hepatic cells and other mammalian cells.