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Polymorphism of CYP3A4 and ABCB1 genes increase the risk of neuropathy in breast cancer patients treated with paclitaxel and docetaxel

Authors Kus T, Aktas G, Kalender M, Demiryurek AT, Ulasli M, Oztuzcu S, Sevinc A, Kul S, Camci C

Received 17 February 2016

Accepted for publication 1 May 2016

Published 12 August 2016 Volume 2016:9 Pages 5073—5080


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Professor Min Li

Tulay Kus,1 Gokmen Aktas,1 Mehmet Emin Kalender,1 Abdullah Tuncay Demiryurek,2 Mustafa Ulasli,1 Serdar Oztuzcu,3 Alper Sevinc,1 Seval Kul,4 Celaletdin Camci1

1Department of Internal Medicine, Division of Medical Oncology, University of Gaziantep, Gaziantep Oncology Hospital, Gaziantep, Turkey; 2Department of Medical Pharmacology, 3Department of Medical Biology, Faculty of Medicine, University of Gaziantep, Gaziantep, Turkey; 4Department of Biostatistics, Faculty of Medicine, University of Gaziantep, Gaziantep, Turkey

Background: Interindividual variability of pharmacogenetics may account for unpredictable neurotoxicities of taxanes.
Methods: From March 2011 to June 2015, female patients with operable breast cancer who had received docetaxel- or paclitaxel-containing adjuvant chemotherapy were included in this study. All patients were treated with single-agent paclitaxel intravenously (IV) 175 mg/m2 every 3 weeks for four cycles, or IV 80 mg/m2 weekly for 12 cycles, and IV 100 mg/m2 docetaxel for four cycles as adjuvant treatment. We evaluated the relationship between neurotoxicity of taxanes and single-nucleotide polymorphisms of ABCB1, CYP3A4, ERCC1, ERCC2, FGFR4, TP53, ERBB2, and CYP2C8 genes. Taxane-induced neurotoxicity during the treatment was evaluated according to the National Cancer Institute Common Toxicity Criteria version 4.03 prior to each cycle. Chi-squared tests were used to compare the two groups, and multivariate binary logistic regression models were used for determining possible risk factors of neuropathy.
Results: Pharmacogenetic analysis was performed in 219 females. ABCB1 3435 TT genotype had significantly higher risk for grade ≥2 neurotoxicity (odds ratio [OR]: 2.759, 95% confidence interval [CI]: 1.172–6.493, P: 0.017) compared to TC and CC genotype, and also CYP3A4 392 AA and AG genotype had significantly higher risk for grade ≥2 neurotoxicity (OR: 2.259, 95% CI: 1.033–4.941, P: 0.038) compared to GG genotype. For FDGF4 gene with AG and GG genotype, OR was 1.879 (95% CI: 1.001–3.525, P: 0.048) compared to AA genotype with regard to any grade of neuropathy risk. We could not find any other association of other genotypes with neurotoxicity grades.
Conclusion: ABCB1 3435 TT genotype and CYP3A4 392 AA/AG genotypes may be used as predictors of neurotoxicity during taxane chemotherapy.

Keywords: neurotoxicity, docetaxel, paclitaxel, CYP3A4, ABCB1, single nucleotide polymorphisms

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