Moreover, the EMT transcription factors (EMT-TFs), such as ZEB (zinc finger E-box-binding homeobox) and SNAIL (zinc finger protein SNAI1), have even been shown to play an important role in tumor progression in non-carcinomas, such as melanoma [39,40] and glioblastoma [41,42]. Here, SNAI1 is linked to glioblastoma.