Related Experiment Videos
Redox events in interleukin-1 signaling
Regina Brigelius-Flohé1, Antje Banning, Melanie Kny
1Department of Vitamins and Atheroscerosis, German Institute of Human Nutrition, Potsdam-Rehbruecke, Bergholz-Rehbruecke, Germany. flohe@mail.dife.de
Archives of Biochemistry and Biophysics
|March 3, 2004
Summary
Reactive oxygen species (ROS) impact cell signaling by modifying proteins. Glutathione peroxidases and thiol modifying agents influence inflammatory pathways, affecting receptor complex assembly and gene expression.
Area of Science:
- Biochemistry
- Cell Biology
- Immunology
Background:
- Reactive oxygen species (ROS) are increasingly recognized as key mediators in growth factor and cytokine signaling.
- ROS can modulate signaling cascades by altering the activity of essential cysteine residues in proteins.
- Inflammatory cytokines like Interleukin-1 (IL-1) can both induce ROS production and be influenced by ROS and thiol modification.
Purpose of the Study:
- To summarize the effects of thiol modifying agents, selenium, and glutathione peroxidases (GPx) on Interleukin-1 (IL-1) signaling pathways.
- To investigate the impact of these agents on early, intermediate, and late events in IL-1 signaling.
- To highlight the role of GPx, particularly phospholipid hydroperoxide GPx, in managing ROS-mediated signaling.
Main Methods:
- Review of existing literature on ROS, thiol modification, and IL-1 signaling.
- Focus on enzymes like peroxiredoxins and glutathione peroxidases (GPx) that catalyze reversible thiol modifications.
- Analysis of effects on IL-1 receptor complex assembly, NF-kappa B activation, and cell adhesion molecule expression.
Main Results:
- Thiol modifying agents and GPx significantly impact IL-1 signaling at multiple stages.
- Early events, such as IL-1 receptor signaling complex assembly, are sensitive to these modifications.
- Intermediate (NF-kappa B activation) and late events (cell adhesion molecule expression) are also modulated by ROS and thiol-reactive compounds.
Conclusions:
- ROS play a critical role in regulating inflammatory and growth factor signaling pathways.
- Enzymes like GPx are crucial in managing ROS levels and their impact on cellular signaling.
- Targeting thiol modifications offers potential therapeutic strategies for inflammatory conditions by modulating IL-1 signaling.