DHX9 and Ewing sarcoma: In the report by Liu et al. [44], miR-483-5p-mediated P3 mRNA transcription up-regulation is implicated in increased recruitment of DHX9 to the P3 mRNA 5′UTR in MHH-ES-1 Ewing’s sarcoma cells, but it remains unkown how DHX9 mediates P3 mRNA transcription activation.