HIF1A and nasopharyngeal carcinoma: DANCR promotes the motility of nasopharyngeal carcinoma cells by stabilizing hypoxia inducible factor-1α, the subunit of Hypoxia inducible factor 1 (HIF-1) which are transcription factors that can activate several hypoxia-responsive genes in response to hypoxia microenvironment and promote the metastasis and invasion of cancer cells (24, 25).