ZEB1 and breast cancer: Resistin can upregulate the expression of mesenchymal marker such as zinc finger E-box binding homeobox 1 (ZEB1), Zinc finger protein SNAI1 and 2 (SNAIL/SLUG), and Twist-related protein 1 (TWIST1) and downregulate the expression of epithelial markers (E-cadherine and claudin-1), thereby promoting the EMT transition responsible for the migratory and invasive potential of BC cells [137,138,139].