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Updated: Jul 14, 2026

Assessment of Global DNA Double-Strand End Resection using BrdU-DNA Labeling coupled with Cell Cycle Discrimination Imaging
Published on: April 28, 2021
Targeting DNA repair as a promising approach in cancer therapy
Giovanna Damia1, Maurizio D'Incalci
1Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri, Via Eritrea 62, 20157 Milan, Italy.
Abstract:
An increased DNA-repair activity in tumour cells has been associated with resistance to treatment to DNA-directed drugs, while defects in DNA repair pathways result in hypersensitivity to these agents. In the past years the unravelling of the molecular basis of these DNA pathways, with a better understanding of the DNA damage caused by different anticancer agents, has provided the rationale for the use of some DNA repair inhibitors to optimise the therapeutic use of DNA-damaging agents currently used in the treatment of tumours. In addition, the possibility to specifically target the differences in DNA repair capacity between normal and tumour cells has recently emerged as an exciting possibility. The present review will mainly cover those approaches that are currently under clinical investigation.
Insights
Understanding DNA repair mechanisms in cancer is key to improving treatments. Inhibiting DNA repair pathways can enhance the effectiveness of chemotherapy drugs, especially in tumor cells.
Area of Science:
- Molecular Biology
- Oncology
- Pharmacology
Background:
- Tumor cells with high DNA repair activity often resist DNA-damaging drugs.
- Defects in DNA repair pathways can lead to hypersensitivity to these agents.
- Advances in understanding DNA repair and drug-induced damage inform new therapeutic strategies.
Purpose of the Study:
- To review current clinical investigations into DNA repair inhibitors.
- To explore strategies for optimizing DNA-damaging agents using DNA repair inhibitors.
- To highlight the potential of targeting differential DNA repair capacities between normal and tumor cells.
Main Methods:
- Review of clinical trial data and scientific literature.
- Analysis of molecular mechanisms underlying DNA repair and drug resistance.
- Focus on therapeutic approaches currently under clinical investigation.
Main Results:
- DNA repair inhibitors show promise in overcoming drug resistance in tumors.
- Targeting specific DNA repair pathways can enhance chemotherapy efficacy.
- Exploiting differences in DNA repair between tumor and normal cells is a developing strategy.
Conclusions:
- DNA repair inhibitors are a promising avenue for improving cancer treatment outcomes.
- Further clinical investigation is needed to fully realize the potential of these agents.
- Personalized approaches targeting tumor-specific DNA repair mechanisms may offer new therapeutic options.
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