Related Experiment Videos
Repression of gene expression by oxidative stress
1INSERM U490, Centre universitaire des Saints-Pères, 45 rue des Saints-Pères, 75006 Paris, France.
The Biochemical Journal
|September 8, 1999
Summary
Oxidative stress, caused by reactive oxygen species (ROS), can both trigger and suppress gene expression. This review explores how ROS-induced gene repression affects physiological functions and transcription factors.
Area of Science:
- Molecular Biology
- Cellular Signaling
- Biochemistry
Background:
- Gene expression is regulated by physiological signals and environmental factors.
- Oxidative stress, involving reactive oxygen species (ROS), acts as a key modulator in these pathways.
- While gene induction by oxidative stress is well-studied, gene repression by ROS is increasingly recognized.
Purpose of the Study:
- To review the impact of oxidative stress on gene transcription, focusing on gene repression.
- To describe physiological function alterations due to ROS-mediated gene inhibition.
- To examine the repressive oxidative modulation of transcription factors by ROS.
Main Methods:
- Literature review of studies on oxidative stress and gene expression.
- Analysis of research on ROS as signaling molecules and cellular insults.
- Focus on studies detailing gene repression mechanisms by ROS.
Main Results:
- Oxidative stress can specifically down-regulate the expression of various genes, even at non-cytotoxic levels.
- ROS act as second messengers for certain physiological signals and are produced during cellular insults.
- Evidence shows ROS can repress gene transcription, altering physiological functions.
Conclusions:
- Oxidative stress plays a critical role in modulating gene expression through both induction and repression.
- ROS-mediated gene repression significantly impacts cellular physiology.
- Understanding ROS modulation of transcription factors is crucial for comprehending gene regulation.