Transforming growth factor-β (TGF-β) signals have an important role in the metastatic spread of cancer cells (Saito et al, 2000; Massague, 2008; Yang and Moses, 2008), such as migration, invasion, and epithelial-to-mesenchymal transition (EMT) (Thiery, 2002; Massague, 2008). Here, TGFB1 is linked to cancer.