NFKB1 and nasopharyngeal carcinoma: As shown in Figure 1, control vector transfection showed a lowest luciferase activity, while transfection of pNF-κB-Luc into NPC cells resulted in significantly higher NF-κB transcriptional activities for both HK1 (P < 0.001) and CNE-1 (P < 0.001) cell lines.