NFE2L2 and retinoblastoma: Administration of quercetin with RB in group III caused a significant upregulation (P < 0.01) in the mRNA expression of the Nrf2 gene in the cerebral cortex when compared to the other groups: the control group by 19%, the RB-treated group by 2 folds of increase, and the RB-recovery group by 1.5 folds of increase.