PTGDR and neoplasm: Increased tumour size and weight and DLX6 expression were observed after sh‐DLX6‐AS1 + oe‐DLX6 treatment as compared with sh‐DLX6‐AS1 treatment, whereas there were opposite trends after sh‐DLX6‐AS1 + sh‐DLX6 treatment (P < 0.05).