Drug-induced DNA damage and tumor chemosensitivity.

Author:

Epstein R J

Abstract

Cytotoxic drugs act principally by damaging tumor-cell DNA. Quantitative analysis of this interaction provides a basis for understanding the biology of therapeutic cell kill as well as a rational strategy for optimizing and predicting tumor response. Recent advances have made it possible to correlate assayed DNA lesions with cytotoxicity in tumor cell lines, in animal models, and in patients with malignant disease. In addition, many of the complex interrelationships between DNA damage, DNA repair, and alterations of gene expression in response to DNA damage have been defined. Techniques for modulating DNA damage and cytotoxicity using schedule-specific cytotoxic combinations, DNA repair inhibitors, cell-cycle manipulations, and adjunctive noncytotoxic drug therapy are being developed, and critical therapeutic targets have been identified within tumor-cell subpopulations and genomic DNA alike. Most importantly, methods for predicting clinical response to cytotoxic therapy using both in vitro markers of tumor-cell sensitivity and in vivo measurements of drug-induced DNA damage are now becoming a reality. These advances can be expected to provide a strong foundation for the development of innovative cytotoxic drug strategies over the next decade.

Publisher

American Society of Clinical Oncology (ASCO)

Subject

Cancer Research,Oncology

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