The bioinformatics prediction and the result of luciferase assay identified that Bmi-1 was directly targeted by miR-203, which radiosensitized cancer cells through repression of Bmi-1, ectopic expression of Bmi-1 without 3′-UTR could reverse the improvement of radiosensitivity by miR-203 [73]. Here, BMI1 is linked to cancer.