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Updated: Jul 8, 2026

Production and Detection of Reactive Oxygen Species (ROS) in Cancers
Published on: November 21, 2011
Reactive oxygen species: current knowledge and applications in cancer research and therapeutic
Andy T Y Lau1, Ying Wang, Jen-Fu Chiu
1Department of Anatomy, The University of Hong Kong, Pokfulam, Hong Kong SAR, People's Republic of China.
Abstract:
Reactive oxygen species (ROS) are natural products inevitably generated along cellular metabolism. Due to their highly reactive nature, which can damage DNA, proteins and lipids, cells utilize antioxidative or defense systems to balance these toxic products to keep the cells in a state of redox homeostasis. However, under the situation of imbalance in redox status, depending on the magnitude of ROS encountered, high levels of ROS can induce apoptosis, whereas chronic low levels of ROS promote vascular diseases such as arteriosclerosis. Although ROS seem to be catastrophic to life, accumulating evidence points to the beneficial roles of ROS by virtue of the ability as chemotherapeutic agents to cure human diseases. Many anti-cancer drugs have been developed in this way which can generate ROS and cause oxidative stress-induced apoptosis in cancer cells. The effects of ROS are paradoxical because they can act as both disease culprits and chemotherapeutic agents. In this review, the current knowledge of ROS and the potential applications of ROS in cancer therapeutic will be discussed.
Insights
Reactive oxygen species (ROS) are vital cellular products with dual roles. While high ROS levels cause disease, controlled ROS generation shows promise as a novel cancer therapeutic strategy.
Area of Science:
- Cellular Biology
- Biochemistry
- Oncology
Background:
- Reactive oxygen species (ROS) are metabolic byproducts essential for cellular function.
- Imbalances in ROS levels can lead to cellular damage, inducing apoptosis or promoting diseases like arteriosclerosis.
- Cells possess antioxidant systems to maintain redox homeostasis, balancing ROS production and detoxification.
Purpose of the Study:
- To review the paradoxical roles of ROS in cellular processes.
- To explore the potential of ROS as chemotherapeutic agents in cancer treatment.
- To discuss the current understanding of ROS in both disease pathogenesis and therapeutic applications.
Main Methods:
- Literature review of existing research on ROS.
- Analysis of studies investigating ROS in cellular metabolism and disease.
- Examination of evidence supporting ROS-based cancer therapies.
Main Results:
- ROS exhibit dual functions, acting as both damaging agents and therapeutic tools.
- Elevated ROS levels can trigger programmed cell death (apoptosis) in cancer cells.
- Targeted ROS generation is a basis for developing novel anti-cancer drugs.
Conclusions:
- ROS play a complex role in health and disease, necessitating a nuanced understanding.
- The therapeutic potential of ROS in oncology is significant, offering new avenues for cancer treatment.
- Further research into ROS modulation could lead to innovative chemotherapeutic strategies.
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