PLAUR and nasopharyngeal carcinoma: Recently, by treating highly-metastatic NPC cell lines S18 and 58 F with UTI, Li et al. found that UTI suppressed the migration and infiltration of S18 and 5–8 F cells and suppressed the metastasis of S18 cells in vivo by downregulating the expression of uPA and uPAR, thus partially inhibiting the metastasis of nasopharyngeal carcinoma33.