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Updated: Mar 30, 2026

Carotid Artery Infusions for Pharmacokinetic and Pharmacodynamic Analysis of Taxanes in Mice
Published on: October 27, 2014
Genetic polymorphisms and paclitaxel- or docetaxel-induced toxicities: A systematic review
C N Frederiks1, S W Lam1, H J Guchelaar2
1Department of Medical Oncology, VU University Medical Center, Amsterdam, The Netherlands.
Background:
Taxanes, including paclitaxel and docetaxel, are indispensable for treatment of cancer. Development of toxicity frequently necessitates dose reduction or discontinuation of therapy, despite clinical response.
Objective:
Pharmacogenetic studies were reviewed for identification of genetic variants possibly underlying individual susceptibility to adverse events.
Method:
We conducted a systematic search in Pubmed and Embase for pharmacogenetic reports with focus on commonly reported taxane-related gastrointestinal, hematological and neurological toxicities in adult patients with solid tumors. The findings from a total of 51 eligible studies are presented in a comprehensive way.
Results:
Most frequently investigated single nucleotide polymorphisms (SNPs) were located in genes encoding proteins affecting pharmacokinetics, such as drug transporters and genes of the cytochrome P450 family. Inconclusive data for risk of toxicity as well as for effects on drug exposure were reported on variants in ABCB1, CYP3A4, CYP3A5 and, for paclitaxel, CYP2C8. Interest is also dedicated towards genes involved in pharmacodynamics, such as detoxification of reactive oxygen species, DNA repair, neuronal processes and microtubule function. Recent studies include variants in TUBB2A, EPHA5 and EPHA6 for a possible association with neurotoxicity. Variations in methodological approach, sample size, study design, treatment schedule and end-point of toxicity affect consistency of results.
Conclusion:
This review illustrates the complexity to well design pharmacogenetic studies for validation of SNPs that may clarify differences in taxane-induced toxicities among individuals. Novel genes encoding cellular targets of taxanes deserve further analysis by means of robust patient cohorts and definition of objective end-points.
Insights
Pharmacogenetic studies reveal complex genetic factors influencing taxane (chemotherapy) side effects. More robust research is needed to identify specific genetic variants impacting patient responses to these vital cancer drugs.
Area of Science:
- Pharmacogenomics
- Oncology
- Clinical Pharmacology
Background:
- Taxanes (paclitaxel, docetaxel) are crucial cancer treatments.
- Treatment often limited by dose-limiting toxicities.
- Individual susceptibility to taxane toxicity varies significantly.
Purpose of the Study:
- To systematically review pharmacogenetic studies.
- Identify genetic variants associated with taxane-induced adverse events.
- Understand individual differences in taxane toxicity.
Main Methods:
- Systematic literature search (PubMed, Embase).
- Focused on pharmacogenetic reports of taxane toxicities (gastrointestinal, hematological, neurological).
- Included 51 eligible studies on adult patients with solid tumors.
Main Results:
- Commonly studied single nucleotide polymorphisms (SNPs) are in pharmacokinetic genes (CYP450, drug transporters).
- Data on variants in ABCB1, CYP3A4, CYP3A5, and CYP2C8 are inconclusive regarding toxicity risk and drug exposure.
- Emerging research explores pharmacodynamic genes (e.g., TUBB2A, EPHA5, EPHA6) for neurotoxicity links.
Conclusions:
- Designing robust pharmacogenetic studies for taxane toxicity is complex.
- Validation of SNPs requires well-designed studies with objective endpoints.
- Further investigation of novel genes and patient cohorts is essential to clarify individual taxane toxicity differences.
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