AIM: Pharmacogenetic studies in breast cancer (BC) may predict the efficacy of tamoxifen and the toxicity of paclitaxel and capecitabine. We determined the frequency of polymorphisms in the CYP2D6 gene associated with activation of tamoxifen, and those of the genes CYP2C8, CYP3A5 and DPYD associated with toxicity of paclitaxel and capecitabine. We also included a IL-10 gene polymorphism associated with advanced tumor stage at diagnosis. PATIENTS & METHODS: Genomic DNAs from 241 BC patients from northeast Mexico were genotyped using DNA microarray technology. RESULTS: For tamoxifen processing, CYP2D6 genotyping predicted that 90.8% of patients were normal metabolizers, 4.2% ultrarapid, 2.1% intermediate and 2.9% poor metabolizers. For paclitaxel and the CYP2C8 gene, 75.3% were normal, 23.4% intermediate and 1.3% poor metabolizers. Regarding the DPYD gene, only one patient was a poor metabolizer. For the IL-10 gene, 47.1% were poor metabolizers. CONCLUSION: These results contribute valuable information towards personalizing BC chemotherapy in Mexican women.
AIM: Pharmacogenetic studies in breast cancer (BC) may predict the efficacy of tamoxifen and the toxicity of paclitaxel and capecitabine. We determined the frequency of polymorphisms in the CYP2D6 gene associated with activation of tamoxifen, and those of the genes CYP2C8, CYP3A5 and DPYD associated with toxicity of paclitaxel and capecitabine. We also included a IL-10 gene polymorphism associated with advanced tumor stage at diagnosis. PATIENTS & METHODS: Genomic DNAs from 241 BC patients from northeast Mexico were genotyped using DNA microarray technology. RESULTS: For tamoxifen processing, CYP2D6 genotyping predicted that 90.8% of patients were normal metabolizers, 4.2% ultrarapid, 2.1% intermediate and 2.9% poor metabolizers. For paclitaxel and the CYP2C8 gene, 75.3% were normal, 23.4% intermediate and 1.3% poor metabolizers. Regarding the DPYD gene, only one patient was a poor metabolizer. For the IL-10 gene, 47.1% were poor metabolizers. CONCLUSION: These results contribute valuable information towards personalizing BC chemotherapy in Mexican women.
Authors: Filipa Lynce; Kristi D Graves; Lina Jandorf; Charite Ricker; Eida Castro; Laura Moreno; Bianca Augusto; Laura Fejerman; Susan T Vadaparampil Journal: Cancer Control Date: 2016-10 Impact factor: 3.302
Authors: Amanda K Riffel; Mehdi Dehghani; Toinette Hartshorne; Kristen C Floyd; J Steven Leeder; Kevin P Rosenblatt; Andrea Gaedigk Journal: Front Pharmacol Date: 2016-01-12 Impact factor: 5.810
Authors: Jesus Rolando Delgado-Balderas; Maria Lourdes Garza-Rodriguez; Gabriela Sofia Gomez-Macias; Alvaro Barboza-Quintana; Oralia Barboza-Quintana; Ricardo M Cerda-Flores; Ivett Miranda-Maldonado; Hugo Mauricio Vazquez-Garcia; Lezmes Dionicio Valdez-Chapa; Mauro Antonio-Macedo; Michael Dean; Hugo A Barrera-Saldaña Journal: Genes (Basel) Date: 2018-07-11 Impact factor: 4.096