To characterize the function of FAS-AS1 in NPC cells, we detected its expression in human NPC cell lines and observed a significant downregulation of FAS-AS1 in NPC cell lines (HNE1, HONE1) compared with normal nasopharyngeal epithelial cell line NP69 (Fig. 3a). Here, PTGDR is linked to nasopharyngeal carcinoma.