LCN2 and nasopharyngeal carcinoma: To verify the expression of LCN2 identified in the microarray data, western blotting and RT-qPCR were performed to detect the protein and mRNA levels of LCN2, respectively, in five NPC cell lines (CNE1, CNE2, HNE1, HNOE1, and SUNE1) and one radioresistant NPC cell line (CNE2R).