Scratch wound healing assay to confirm the effect of CK to inhibit migration of neuroblastoma cells. (Left) SK-N-MC cells were treated with 0, 20, 40, and 60 µM of CK for 48 h and images were recorded at 0 h and 48 h after scratching. (Right) The wound coverage % was determined by the aera of cells migrating towards the scratched area over time using ImageJ TM software (Mean ± SE, * p < 0.05).