PMID: 15228171Jul 2, 2004Paper

Pharmacogenetics in cancer chemotherapy: balancing toxicity and response

Therapeutic Drug Monitoring
James G Donnelly

Abstract

The goal of chemotherapy is the elimination of tumor cells from the host. This is achieved by the use of therapeutic agents that are often more harmful to normal tissues than to the targeted tumor. Many chemotherapeutic agents are designed to damage cell replication machinery either directly at the level of DNA or indirectly, by inhibiting enzymes involved with DNA repair and synthesis. Novel therapeutic agents that exert their effects at signal transduction pathways have advanced chemotherapy; however, a role for the classic chemotherapeutic agents remains. These classic agents are associated with tumor cell resistance, toxicity, and occasionally secondary neoplasia. Current practices for the dosing of therapeutic agents rely on height and body surface measurements or drug monitoring and Bayesian adaptive control. Pharmacogenetics is emerging as an alternate approach to managing chemotherapy that may prevent undertreatment while avoiding overtreatment and associated toxicities. By determining the polymorphic genetic makeup of the host and, in some instances, the altered genetic expression of the tumor, chemotherapy can be tailored for interindividual response and toxicity avoidance. Chemotherapy is particularly applicable to t...Continue Reading

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