Base excision repair and its implications to cancer therapy

Area of Science:

• Molecular Biology
• Genetics
• Cancer Research

Background:

• Base excision repair (BER) is a critical DNA repair pathway that protects genomic integrity from oxidative damage and exogenous agents.
• BER involves a complex network of over 30 proteins, generating single-strand breaks as repair intermediates.
• While BER deficiency increases mutation rates and cancer risk, cancer cells often upregulate BER to survive oxidative stress.

Purpose of the Study:

• To review the current progress in developing inhibitors for enzymes within the BER pathway.
• To discuss the challenges associated with targeting BER as a therapeutic strategy in oncology.

Main Methods:

• Literature review of recent advancements in BER inhibitor research.
• Analysis of the role of BER in cancer cell survival and drug resistance.
• Discussion of clinical trial progress and hurdles for BER-targeted therapies.

Main Results:

• Several inhibitors targeting key BER enzymes are in development, showing potential for cancer treatment.
• Cancer cells' reliance on BER for managing oxidative stress presents a vulnerability that can be exploited therapeutically.
• Challenges include off-target effects, drug resistance mechanisms, and optimizing combination therapies.

Conclusions:

• Targeting the BER pathway offers a promising avenue for cancer therapy by inducing synthetic lethality or enhancing existing treatments.
• Further research is needed to overcome the challenges in developing effective and safe BER inhibitors for clinical use.