OTUB1 and nasopharyngeal carcinoma: FTO (Fat mass and obesity-associated protein), an m6A demethylase, removes m6A modifications from OTUB1 (OTU Deubiquitinase, Ubiquitin Aldehyde Binding 1) mRNA, which promotes the expression of OTUB1, inhibiting radiotherapy-induced ferroptosis and causing radiotherapy resistance in NPC.5