SNAI2 and breast cancer: In spite of the fact that in human breast cancer cells, NF-κB binds to the promoter regions of Snai2, Twist1, and ZEB2 and activates their transcription (Pires et al., 2017), PDGF-AB does not increase the expression of Snai2, Twist1, and ZEB2 in brain ECs (Liu et al., 2018).