S100A9 and nasopharyngeal carcinoma: According to the results of CCK-8 assay (Figure 1), the viability of NPC cells was improved markedly at 48 and 72 h in the overexpression group (∗p < 0.05, ∗p < 0.05) but decreased notably in the siRNA group (#p < 0.05, #p < 0.05) compared with that in the control group, suggesting that siRNA S100A8/S100A9 can inhibit the viability of NPC cells.