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Production and Detection of Reactive Oxygen Species ROS in Cancers
Published on: November 21, 2011
Reactive Oxygen Species: Involvement in T Cell Signaling and Metabolism
Davide G Franchina1, Catherine Dostert1, Dirk Brenner2
1Department of Infection and Immunity, Experimental and Molecular Immunology, Luxembourg Institute of Health, L-4354 Esch-sur-Alzette, Luxembourg.
Abstract:
T cells are a central component of defenses against pathogens and tumors. Their effector functions are sustained by specific metabolic changes that occur upon activation, and these have been the focus of renewed interest. Energy production inevitably generates unwanted products, namely reactive oxygen species (ROS), which have long been known to trigger cell death. However, there is now evidence that ROS also act as intracellular signaling molecules both in steady-state and upon antigen recognition. The levels and localization of ROS contribute to the redox modeling of effector proteins and transcription factors, influencing the outcome of the T cell response. We discuss here how ROS can directly fine-tune metabolism and effector functions of T cells.
Insights
Reactive oxygen species (ROS) are byproducts of T cell energy production. New evidence shows ROS act as signaling molecules, fine-tuning T cell metabolism and function against pathogens and tumors.
Area of Science:
- Immunology
- Cellular Metabolism
- Redox Biology
Background:
- T cells are crucial for immune defense against pathogens and tumors.
- T cell activation involves metabolic shifts to sustain effector functions.
- Reactive oxygen species (ROS) were traditionally viewed as harmful byproducts of metabolism.
Purpose of the Study:
- To explore the dual role of ROS in T cell biology.
- To investigate how ROS influence T cell metabolism and effector functions.
- To highlight the significance of ROS in immune responses.
Main Methods:
- Review of current literature on T cell metabolism and ROS signaling.
- Analysis of studies investigating ROS levels and localization in T cells.
- Discussion of redox modifications impacting T cell proteins and transcription factors.
Main Results:
- ROS are increasingly recognized as critical intracellular signaling molecules in T cells.
- ROS levels and localization modulate redox states of key cellular components.
- ROS directly influence T cell metabolism and effector functions upon activation and antigen recognition.
Conclusions:
- ROS play a complex role in T cell responses, extending beyond cell death induction.
- Understanding ROS signaling is vital for harnessing T cell functions in immunity and disease.
- Targeting ROS pathways may offer novel therapeutic strategies for immune modulation.
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