RELA and acute lymphoblastic leukemia: To determine ifmiR‐204 affects the occurrence of T‐ALL disease in mice by regulating the NF‐κB signalling pathway, we administered mimic‐NC + oe‐NC, mimic‐miR‐204 + oe‐NC or mimic‐miR‐204 + oe‐p65‐transfected Jurkat cells via the tail vein of groups of mice.