On the one hand, it inhibits tumor growth by inducing apoptosis of transformed cells through the activation of glycogen synthase kinase 3 beta (GSK3B); on the other hand, however, it has been shown in vitro to be able to induce epithelial–mesenchymal transition, which plays an essential role in the formation of tumor metastases [71]. The gene discussed is GSK3B; the disease is neoplasm.