DLX1 and neoplasm: Compared with the blank and NC groups, the tumour growth was significantly decreased in the miR‐539 mimic group and the siRNA‐DLX1 group, while it was significantly elevated in the miR‐539 inhibitor group (P < 0.05) and the miR‐539 inhibitor + si‐DLX1 group presented with no significant difference (P > 0.05).