SNAI2 and cervical carcinoma: To further investigate the function of Slug in human cervical cancer cells, exogenous Slug was stably overexpressed in SiHa (SiHa-Slug, Figure 2C) and C33A (C33A-Slug, Figure 2F) cells; conversely, the expression of Slug was knocked down in HeLa Figure HeLa-shSlug, Figure 2I) and CasKi (CasKi-shSlug, Figure 2L) cells by stably transfecting shRNA plasmids.