Related Experiment Video
Updated: Oct 11, 2025
Production and Detection of Reactive Oxygen Species ROS in Cancers
Published on: November 21, 2011
Reactive Oxygen Species in Anticancer Immunity: A Double-Edged Sword
Jie Wang1,2, Ning Liu2, Hongfei Jiang1,2
1The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China.
Abstract:
Reactive oxygen species (ROS) are critical mediators in many physiological processes including innate and adaptive immunity, making the modulation of ROS level a powerful strategy to augment anticancer immunity. However, current evidences suggest the necessity of a deeper understanding of their multiple roles, which may vary with their concentration, location and the immune microenvironment they are in. Here, we have reviewed the reported effects of ROS on macrophage polarization, immune checkpoint blocking (ICB) therapy, T cell activation and expansion, as well as the induction of immunogenic cell death. A majority of reports are indicating detrimental effects of ROS, but it is unadvisable to simply scavenge them because of their pleiotropic effects in most occasions (except in T cell activation and expansion where ROS are generally undesirable). Therefore, clinical success will need a clearer illustration of their multi-faced functions, as well as more advanced technologies to tune ROS level with high spatiotemporal control and species-specificity. With such progresses, the efficacy of current immunotherapies will be greatly improved by combining with ROS-targeted therapies.
Insights
Reactive oxygen species (ROS) are crucial for immunity, but their complex roles in cancer immunotherapy require careful consideration. Modulating ROS levels offers potential but needs precise control for optimal therapeutic outcomes.
Area of Science:
- Immunology
- Biochemistry
- Cancer Research
Background:
- Reactive oxygen species (ROS) are vital mediators in immune responses, including innate and adaptive immunity.
- Modulating ROS levels presents a promising strategy for enhancing anticancer immunity.
- Understanding the multifaceted roles of ROS, which vary by concentration, location, and microenvironment, is crucial.
Purpose of the Study:
- To review the diverse effects of ROS on key components of the anticancer immune response.
- To evaluate the potential and challenges of targeting ROS in cancer immunotherapy.
- To highlight the need for advanced technologies for precise ROS modulation.
Main Methods:
- Literature review of studies investigating ROS effects on macrophage polarization.
- Analysis of ROS impact on immune checkpoint blocking (ICB) therapy efficacy.
- Examination of ROS roles in T cell activation, expansion, and immunogenic cell death induction.
Main Results:
- ROS exhibit pleiotropic effects, often detrimental, but not always amenable to simple scavenging.
- ROS generally have undesirable effects on T cell activation and expansion.
- Current evidence indicates a complex, context-dependent role for ROS in cancer immunity.
Conclusions:
- A comprehensive understanding of ROS's dual functions is essential for successful clinical application.
- Advanced technologies for spatiotemporal and species-specific ROS tuning are necessary.
- Integrating ROS-targeted therapies with existing immunotherapies holds significant potential for improving cancer treatment efficacy.
Related Concept Videos
01:46Electron Transport Chain: Complex I and II
ROS generation is regulated and maintained at moderate levels necessary...
02:49Cancer Therapies
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
02:53Adaptive Mechanisms in Cancer Cells
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
01:27Tumor Immunotherapy
01:27Cytotoxic T Cells-mediated Immune Response
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
01:29Oxygen Requirements and Growth Patterns