PTGDR and colorectal carcinoma: To investigate the function of BBOX1‐AS1 on CRC progression, we transfected GEO and HCT116 cells with sh‐BBOX1‐AS1 for knocking down BBOX1‐AS1 expression (Fig. 1B, P < 0.01), and sh‐BBOX1‐AS1#1 was chosen for the subsequent assays because of the better interfering efficiency.