MiR-451 is downregulated in NPC cell lines and clinical samples. (A) Relative expression of miR-451 in NP69 and NPC cell lines. (B) Relative expression of miR-29c in NPC (n = 20) and normal nasopharyngeal epithelial tissues (n = 8). U6 used as the endogenous control. Data is presented as the mean ± SD, and P values were calculated with the Student’s t-test.