Emodin can suppress cell growth through inducing cell cycle arrest at G0/G1, S and G2/M stages, such as G0/G1 arrest in NSCLC cells via hyaluronan synthase 2 (HAS2)-mediated signaling [461], and S and G2/M phases arrest in liver cancer (Hep G2) cells [456]. This evidence concerns the gene HAS2 and liver cancer.