Base excision repair, the redox environment and therapeutic implications

Area of Science:

• Biochemistry
• Molecular Biology
• Cancer Research

Background:

• Cellular redox homeostasis is critical for normal function; its disruption leads to oxidative damage and DNA base lesions.
• The base excision repair (BER) pathway is the primary mechanism for repairing oxidative DNA damage.
• Antioxidant enzymes regulate reactive oxygen species (ROS), which are implicated in cellular damage and disease.

Purpose of the Study:

• To provide an overview of reactive oxygen species (ROS) production and its regulation by antioxidant enzymes.
• To discuss the impact of ROS on the base excision repair (BER) pathway, especially in the context of cancer.
• To review redox-modulating agents for cancer therapy, including their potential to overcome resistance and manage toxicity.

Main Methods:

• Literature review of ROS production and antioxidant enzyme function.
• Analysis of the role of ROS in DNA damage and BER pathway activity.
• Survey of current and developing redox-modulating agents in cancer treatment.

Main Results:

• Oxidative stress, driven by ROS, significantly impacts DNA integrity and BER pathway function.
• Inhibition of BER, particularly through PARP inhibitors, is a promising cancer therapeutic strategy.
• Redox modulation presents potential for enhancing cancer therapy efficacy and mitigating side effects.

Conclusions:

• Understanding ROS and BER is crucial for cancer biology and therapy.
• Targeting the redox environment offers novel therapeutic avenues in oncology.
• Further research into redox-modulating agents may lead to improved cancer treatment outcomes.