MKI67 and colorectal carcinoma: The expression of Ki-67 in SW620 and SW480 cells in the miR-31 mimic group was significantly enhanced compared with NC group, while the expression of Ki-67 in SW620 and SW480 cells in the miR-31 inhibitor group decreased compared with NC group (Figure 3C), further indicating that miR-31 can target SFRP1 and modulate its expression in CRC cells.