The circRIP assay confirmed that circCAMSAP1 binds to the 3’UTR of SERPINH1 mRNA in NPC cells (Fig. 4D), and overexpression of circCAMSAP1 enhances the stability of SERPINH1, while knockdown of circCAMSAP1 gives the opposite result in NPC cells after actinomycin D treatment (Fig. 4E). Here, SERPINH1 is linked to nasopharyngeal carcinoma.