CTCF and nasopharyngeal carcinoma: SUCLG2‐AS1 was found to be located in the SE region of SOX2, and it regulated the expression of SOX2 via long‐range chromatin loop formation, which via mediating CTCF (transcription factor) occupied the SE and promoter region of SOX2, thus regulating the metastasis and radiosensitivity of NPC.