As shown in Figure 10E, compared with that in the human bronchial epithelial cell line HBE, the mRNA expression of the CELF2 gene was relatively lower in the laryngeal squamous carcinoma cell line Hep2 (P<0.05) but showed no difference in that in the nasopharyngeal carcinoma cell line HK1 (P>0.05). Here, CELF2 is linked to nasopharyngeal carcinoma.