SNAI2 and cancer: EMT is also associated with invasion in new tissues, supported by the upregulation of Snail Family Transcriptional Repressor 1 (SNAI1) (18) and Twist Basic Helix-Loop-Helix Transcription Factor 1 (TWIST1) (19) via Snail Family Transcriptional Repressor 2 (SLUG; SNAI2) regulation (20) in different cancer types (21–26).