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Updated: May 10, 2025

Production and Detection of Reactive Oxygen Species ROS in Cancers
Published on: November 21, 2011
NOX Family: Regulators of Reactive Oxygen Species Balance in Tumor Cells
Bin Xiong1,2, Yang Zhang2, Siyi Liu2
1Department of Radiation Oncology, The Affiliated Cancer Hospital of Xiangya School of Medicine Central South University/Hunan Cancer Hospital, Changsha, Hunan, China.
Abstract:
Cancer cells are capable of surviving, proliferating, and invading or migrating within hypoxic environments by regulating various adaptive mechanisms. Due to the activation of oncogenes and the inactivation of tumor suppressor genes, and relative deficiencies in oxygen and nutrients, cancer cells demonstrate elevated production of reactive oxygen species (ROS), primarily sourced from NADPH oxidases (NOX family). A key aspect of the reorientation of tumor cell metabolism is the combating of cellular oxidative stress through the promotion of antioxidant molecule synthesis to counteract ROS production. Given that most cancers experience hypoxia and that NOX is closely linked to numerous redox-dependent signaling pathways, the expression and function of NOX are altered in various malignancies. Therefore, this review summarizes the characteristics of NOX family members, their influence on tumor proliferation, invasion, and migration, the role of NOX in promoting tumor angiogenesis, the impact of NOX on the function of immune cells within the tumor microenvironment, and the potential of targeting NOX in tumor therapy. This aims to offer a fresh viewpoint on a comprehensive understanding of the functions of NOX family members.
Insights
NADPH oxidases (NOX) are crucial for cancer cell survival in low-oxygen (hypoxic) environments. Targeting NOX enzymes offers a promising strategy for novel cancer therapies by disrupting tumor growth and spread.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Cancer cells adapt to hypoxic conditions via complex mechanisms.
- Reactive oxygen species (ROS) production, mainly from NADPH oxidases (NOX), is elevated in cancer.
- Tumor cells counteract oxidative stress by increasing antioxidant synthesis.
Purpose of the Study:
- To review the characteristics of NOX family members in cancer.
- To explore NOX's role in tumor proliferation, invasion, migration, and angiogenesis.
- To examine NOX's impact on the tumor immune microenvironment and its therapeutic potential.
Main Methods:
- Literature review of NOX family members' functions in malignancies.
- Analysis of NOX involvement in redox-dependent signaling pathways.
- Synthesis of current understanding on targeting NOX for cancer treatment.
Main Results:
- NOX enzymes are altered in various cancers, influencing key oncogenic processes.
- NOX family members play significant roles in tumor growth, metastasis, and angiogenesis.
- NOX activity impacts immune cell function within the tumor microenvironment.
Conclusions:
- NOX family members are critical regulators of cancer cell adaptation and progression.
- Targeting NOX presents a viable therapeutic strategy for multiple cancer types.
- Further research into NOX functions can provide new insights into cancer biology and treatment.
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