The increased expression levels of EIF4G1 mRNA and protein in NPC tumor tissue and cell lines and their association with the overall survival of NPC patients. A. EIF4G1 mRNA expression in NPC cell lines, tumor tissues, and non-cancerous nasopharyngeal (NP) tissues. EIF4G1 mRNA level was relatively high in NPC tissue, NPC cell lines (except 6-10B cells) comparing to nasopharyngeal tissue and NP69 cells. B. EIF4G1 protein expression in NPC and nasopharyngeal tissues.(1) Negative control; (2) Weak expression of EIF4G1 in nasopharyngeal tissues; (3-5) Strong expression of EIF4G1 in NPC tissues (magnification 400×). C. Kaplan--Meier survival analysis of the overall survival time in 107 NPC patients based on the levels of EIF4G1 protein expression. The log-rank test was used.