Slug, Snail, E-cadherin, N-cadherin, and β-catenin, which are involved in epithelial-mesenchymal transition (EMT), have also been reported to promote cancer cell migration and invasion [17, 18, 38–43], while RhoA, Cdc42, and Rac1 are members of the Rho family of small GTPases, and are key mediators of actin polymerization and cell migration. The gene discussed is SNAI1; the disease is cancer.