Prx II is a peroxidase that reduces hydrogen peroxide and organic hydroperoxides. Higher levels of Prx II in cancer cells enhance their ability to detoxify reactive oxygen species (ROS).
• This protection against oxidative damage enables tumor cells to survive in a stressful microenvironment characterized by high metabolic activity and inflammation.
Prx II is often upregulated in several types of cancers. For example, increased expression of Prx II has been reported in breast, lung, colorectal, and gastric cancers, among others. This upregulation is generally viewed as an adaptive response of cancer cells to the increased oxidative stress associated with rapid proliferation and a hostile tumor microenvironment.
- Higher Prx II expression has been associated with unfavorable clinical outcomes.
• Many cancer therapies, including chemotherapy and radiation therapy, rely on the generation of ROS to induce cancer cell death. Elevated levels of Prx II can reduce the efficacy of these treatments by neutralizing ROS, thereby contributing to resistance.
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