Accordingly, high Slug expression has been found in a variety of tumors (Alves et al., 2009), including TNBC (Martin et al., 2005; Storci et al., 2008; Lehmann et al., 2011), which has been correlated with reduced E-cadherin expression, high cancer staging, lymph node micro-metastasis and poor patient survival outcomes (Bailey et al., 2012). Here, SNAI2 is linked to cancer.