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Influence of smoking on the pharmacokinetics and toxicity profiles of taxane therapy

By A.J.M. (Anne-Joy) de Graan, W.J. (Walter) Loos, L.E. (Lena) Friberg, S.D. (Sharyn) Baker, J.M. (Jessica) van der Bol, L. (Leni) van Doorn, E.A.C. (Erik) Wiemer, B. (Bronno) van der Holt, J. (Jaap) Verweij and A.H.J. (Ron) Mathijssen


Purpose: Cigarette smoke is known to interact with the metabolism of several anticancer drugs. It may also affect the incidence and severity of adverse events and efficacy of chemotherapy. The main objective of this study was to examine the effects of smoking on the pharmacokinetics and toxicities of patients treated with docetaxel or paclitaxel. Experimental Design: Smoking status, toxicity profiles, and pharmacokinetic parameters (calculated by nonlinear mixed-effect modeling population analysis) were determined in 566 patients (429 nonsmokers and 137 smokers) treated with docetaxel or paclitaxel. Results: Smokers treated with docetaxel showed less grade IV neutropenia (35% vs. 52%; P = 0.01) than nonsmokers. Smokers treated with paclitaxel had less grade III-IV leukopenia than nonsmokers (12% vs. 25%; P = 0.03), and the white blood cell (WBC) nadir was lower in nonsmokers (median, 2.7 × 10 9/L; range, 0.05 × 109 to 11.6 × 10 9/L) than in smokers (median, 3.3 × 109/L; range 0.8 × 109 to 10.2 × 109/L; P = 0.02). Of interest, significantly lower WBC counts and absolute neutrophil counts at baseline were seen in nonsmoking patients treated with paclitaxel (P = 0.0001). Pharmacokinetic parameters were similar in smokers and nonsmokers for both taxanes. Conclusion: Cigarette smoking does not alter the pharmacokinetic determinants of docetaxel and paclitaxel. Smokers treated withdocetaxel and paclitaxel have less neutropenia and leukopenia,but further research is warranted to elucidate this potential protective effect

Year: 2012
DOI identifier: 10.1158/1078-0432.CCR-12-0728
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