Figure 2. Cell migration and invasion were promoted by circCCDC66. (A, B) Transwell assays were used to detect cell migration and invasion capacities of SW1783 cells after transfection. (C, D) Transwell assays were used to evaluate cell metastasis potential after transfection in U373 cells. *P < 0.05, **P < 0.01, ***P < 0.001.