Can knowledge of germline markers of toxicity optimize dosing and efficacy of cancer therapy?
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Updated: May 21, 2026

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
Published on: February 6, 2015
Daniel Crona1, Federico Innocenti
1Institute for Pharmacogenomics and Individualized Therapy, University of North Carolina, Chapel Hill, USA.
Abstract:
The systemic treatment of cancer with traditional cytotoxic chemotherapeutic agents and more targeted agents is often complicated by the onset of adverse drug reactions. Pharmacogenetic prediction of adverse drug reactions might have consequences for dosing and efficacy. This review discusses relevant examples where the germline variant-toxicity relationship has been validated as an initial step in developing clinically useful pharmacogenetic markers and provides examples where germline variants have influenced dosing strategies and/or survival or other outcomes of efficacy. This review will also provide insight into the reasons why more pharmacogenetic markers have not been routinely integrated into clinical practice.
Insights
Pharmacogenetics helps predict cancer drug reactions, guiding personalized dosing and improving treatment efficacy. Understanding germline variants is key to integrating these markers into clinical practice for better patient outcomes.
Area of Science:
- Oncology
- Pharmacogenetics
- Genomics
Background:
- Cancer therapies, including chemotherapy and targeted agents, frequently cause adverse drug reactions.
- Adverse drug reactions can significantly impact treatment efficacy and patient outcomes.
- Pharmacogenetics offers a potential solution for predicting and mitigating these reactions.
Purpose of the Study:
- To review validated germline variant-toxicity relationships in cancer treatment.
- To provide examples of how germline variants influence dosing, survival, and efficacy.
- To explore barriers to the routine clinical integration of pharmacogenetic markers.
Main Methods:
- Literature review of pharmacogenetic studies in cancer treatment.
- Analysis of validated germline variant-toxicity relationships.
- Examination of clinical case studies demonstrating pharmacogenetic impact on outcomes.
Main Results:
- Several germline variants have been validated for predicting toxicity and influencing treatment outcomes.
- Examples exist where pharmacogenetic information has guided dosing strategies and improved survival.
- The clinical integration of pharmacogenetic markers faces challenges despite demonstrated utility.
Conclusions:
- Pharmacogenetic prediction of adverse drug reactions is crucial for optimizing cancer therapy.
- Validated germline variants can inform personalized dosing and improve treatment efficacy.
- Further efforts are needed to overcome barriers and facilitate routine clinical adoption of pharmacogenetics.
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