In order to generate SW620 cells with a stable expression of INPP4B, SW620 cells were transfected with the pCMV-2B control vector or pCMV-2B-INPP4B vector with Lipofectamine 3000 (Thermo Fisher Scientific), according to the recommendations of the manufacturer. At 48 hours post-transfection, the transfected cells were selected with 0.5 mg/mL of G418 (Sigma-Aldrich Co., St Louis, MO, USA) for 2 weeks.
For establishing stable INPP4B knockdown HCT116 cells, HCT116 cells were infected with lentiviral particles harboring control shRNA or INPP4B shRNA (GeneChem Co., Shanghai, China). After 48 hours of infection, cells were selected in culture medium containing 1 μg/mL of puromycin (Thermo Fisher Scientific) for 10 days.