Association between SLCO1B1 rs4149056 and tegafur-uracil-induced hepatic dysfunction in breast cancer.

Aim: The aim of this study was to identify pharmacogenomic biomarkers to predict tegafur-uracil (UFT)-induced liver dysfunction. Patients & methods:A total of 68patients, who were administered UFT, were evaluated using a two-step pharmacogenomics analysis. Results: The first screening revealed the association between five SNPs and UFT-induced hepatic dysfunction. In the second step, SLCO1B1 (rs4149056) was found to be the only SNP associated with UFT treatment-related elevation of aspartate aminotransferase (odds ratio: C/C vs T/T=7.8, C/T vs T/T=5.7; p=0.037) and alanine transaminase (odds ratio: C/C vs T/T=12.2, C/T vs T/T=4.1; p=0.034) levels. Conclusion:TheSLCO1B1 polymorphisms are possible predictors of UFT treatment-related hepatic dysfunction.