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11:04
Evaluation of the Impact of Protein Aggregation on Cellular Oxidative Stress in Yeast
Published on: June 23, 2018
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Pathophysiological importance of aggregated damaged proteins.
Annika Höhn1, Tobias Jung1, Tilman Grune1
1Department of Nutritional Toxicology, Institute of Nutrition, Friedrich-Schiller-University Jena, 07743 Jena, Germany.
Free Radical Biology & Medicine
|March 18, 2014
Summary
Oxidative stress from reactive oxygen species (ROS) damages proteins, leading to aggregation. Impaired cellular defense and proteolytic systems contribute to this accumulation, affecting homeostasis and metabolism in aging and disease.
Area of Science:
- Cellular Biology
- Biochemistry
- Molecular Biology
Background:
- Reactive oxygen species (ROS) are constantly generated, and elevated levels overwhelm cellular defenses.
- Oxidative stress damages cellular components, including proteins, lipids, and nucleic acids.
- Modified proteins can lead to altered function, aggregation, and impaired cellular processes.
Purpose of the Study:
- To review current knowledge on protein aggregation mechanisms.
- To explore the role of oxidative stress in protein aggregation.
- To discuss the implications of protein aggregation in aging and disease.
Main Methods:
- Literature review of studies on oxidative stress and protein aggregation.
- Analysis of the interplay between ROS, protein modification, and proteolytic systems.
- Examination of the link between protein aggregates and cellular dysfunction.
Main Results:
- Oxidative stress induces protein modifications like oxidation and glycation.
- Impaired proteasome and autophagy-lysosomal systems fail to clear damaged proteins.
- Accumulation of non-degradable protein aggregates disrupts cellular homeostasis and metabolism.
Conclusions:
- Protein aggregation is a significant consequence of oxidative stress.
- Dysfunctional proteolytic systems exacerbate protein aggregate formation.
- Protein aggregation is implicated in the pathogenesis of aging and various diseases.
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