Vitamin E recovered NAD/NADH ratio in SDHvar+ cells. Two control cell lines and 3 SDHvar+ cell lines were treated with wither DMSO or 100µM vitamin E for 72 hours. A) Normalized NAD/NADH ratio in each cell line after the treatment. Data were presented as mean ± SEM of three replicates. B) Whole cell lysate was blotted for p53, NQO1, PTEN, pMAPK, tMAPK, pAKT, tAKT, and GAPDH as loading control.