SNAI2 and cervical cancer: In addition, the average weight of the tumors formed by the SiHa-Slug cells was much smaller than that of the tumors formed by the SiHa-GFP control cells (Figure 3B, p < 0.05), indicating that the over-expression of the Slug protein could suppress tumor initiation and the development of the SiHa cervical cancer cell line in vivo.