Febuxostat facilitates nuclear translocation of Nrf2. (A,C) 3T3-L1 and C3H10T1/2 cells were cultured with Omav or Febu for the indicated time period. Nrf2 levels in the nucleus were analyzed by western blotting. p84 served as a loading control. Relative changes in the band intensities normalized by respective loading controls are indicated. (B,D) mRNA expression of Ho-1 and Nqo1, the target genes of Nrf2, was determined using real-time PCR. Gapdh served as an endogenous control to normalize each sample. Data are expressed as the mean ± SD (n = 3). * p < 0.05. (E) 3T3-L1 and C3H10T1/2 cells were cultured with allopurinol (Allo) for the indicated time period. Nrf2 levels in the nucleus were analyzed by western blotting, and p84 served as a loading control. Relative changes in the band intensities normalized by respective loading controls are indicated.