DNA-damaging agents in cancer chemotherapy: serendipity and chemical biology
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Updated: May 11, 2026

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
Published on: February 6, 2015
Kahlin Cheung-Ong1, Guri Giaever, Corey Nislow
1Department of Molecular Genetics and the Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada.
Abstract:
DNA-damaging agents have a long history of use in cancer chemotherapy. The full extent of their cellular mechanisms, which is essential to balance efficacy and toxicity, is often unclear. In addition, the use of many anticancer drugs is limited by dose-limiting toxicities as well as the development of drug resistance. Novel anticancer compounds are continually being developed in the hopes of addressing these limitations; however, it is essential to be able to evaluate these compounds for their mechanisms of action. This review covers the current DNA-damaging agents used in the clinic, discusses their limitations, and describes the use of chemical genomics to uncover new information about the DNA damage response network and to evaluate novel DNA-damaging compounds.
Insights
This review explores DNA-damaging agents in cancer therapy, highlighting their limitations and the potential of chemical genomics to evaluate new compounds and understand DNA damage response networks.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- DNA-damaging agents are foundational in cancer chemotherapy but face challenges.
- Understanding their cellular mechanisms is crucial for optimizing efficacy and managing toxicity.
- Drug resistance and dose-limiting toxicities hinder the effectiveness of current treatments.
Purpose of the Study:
- To review current clinical DNA-damaging agents and their limitations.
- To discuss the application of chemical genomics in cancer research.
- To explore how chemical genomics can evaluate novel anticancer compounds and elucidate the DNA damage response network.
Main Methods:
- Literature review of existing DNA-damaging chemotherapy agents.
- Analysis of mechanisms underlying drug resistance and toxicity.
- Exploration of chemical genomics approaches for drug discovery and mechanism elucidation.
Main Results:
- Current DNA-damaging agents have significant limitations including resistance and toxicity.
- Chemical genomics offers a powerful platform for dissecting complex biological networks.
- This approach can reveal novel insights into the DNA damage response network.
Conclusions:
- Further research into DNA-damaging agents is needed to overcome clinical limitations.
- Chemical genomics presents a promising strategy for evaluating novel anticancer compounds.
- Understanding the DNA damage response network is key to developing more effective cancer therapies.
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