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Updated: Jul 18, 2026

Assessing Specificity of Anticancer Drugs In Vitro
Published on: March 23, 2016
Toward individualized treatment: prediction of anticancer drug disposition and toxicity with pharmacogenetics
John F Deeken1, William D Figg, Susan E Bates
1Medical Oncology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20895, USA.
Abstract:
A great deal of effort has been spent in defining the pharmacokinetics and pharmacodynamics of investigational and registered anticancer agents. Often, there is a marked variability in drug handling between individual patients, which contributes to variability in the pharmacodynamic effects of a given dose of a drug. A combination of physiological variables, genetic characteristics (pharmacogenetics) and environmental factors is known to alter the relationship between the absolute dose and the concentration-time profile in plasma. A variety of strategies are now being evaluated in patients with cancer to improve the therapeutic index of anticancer drugs by implementation of pharmacogenetic imprinting through genotyping or phenotyping individual patients. The efforts have mainly focused on variants in genes encoding the drug-metabolizing enzymes thiopurine S-methyltransferase, dihydropyrimidine dehydrogenase, members of the cytochrome P450 family, including the CYP2B, 2C, 2D and 3A subfamilies, members of the UDP glucuronosyltransferase family, as well as the ATP-binding cassette transporters ABCB1 (P-glycoprotein) and ABCG2 (breast cancer resistance protein). Several of these genotyping strategies have been shown to have substantial impact on therapeutic outcome and should eventually lead to improved anticancer chemotherapy.
Insights
Pharmacogenetics improves anticancer drug efficacy by tailoring treatments to individual patient genetic profiles. Understanding genetic variations in drug metabolism and transport enhances chemotherapy outcomes and reduces variability.
Area of Science:
- Pharmacology
- Oncology
- Genetics
Background:
- Individual variability in anticancer drug handling impacts treatment effectiveness.
- Physiological, genetic (pharmacogenetics), and environmental factors influence drug concentration-time profiles.
- Improving the therapeutic index of anticancer drugs is a key challenge in oncology.
Purpose of the Study:
- To evaluate strategies for personalizing anticancer drug therapy.
- To implement pharmacogenetic imprinting through patient genotyping or phenotyping.
- To enhance the therapeutic outcomes of chemotherapy.
Main Methods:
- Focus on genetic variants in drug-metabolizing enzymes (e.g., thiopurine S-methyltransferase, cytochrome P450 family).
- Analysis of genetic variations in ATP-binding cassette transporters (e.g., ABCB1, ABCG2).
- Genotyping and phenotyping of individual cancer patients.
Main Results:
- Pharmacogenetic strategies demonstrate a substantial impact on therapeutic outcomes.
- Identification of key gene variants influencing drug response.
- Variability in drug handling is linked to genetic characteristics.
Conclusions:
- Pharmacogenetic approaches are crucial for optimizing anticancer chemotherapy.
- Genotyping cancer patients can lead to improved treatment efficacy.
- Personalized medicine through pharmacogenetics holds promise for better cancer treatment.
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