TGF-β and WNT/β-catenin signaling pathways are key regulators in EMT.132–134 Exosomes derived from HCC cells could mediate EMT through activating TGF-β/Smad signaling pathway, inducing a decrease in E-cadherin expression, but an increase in Vimentin, which resulted in promoted migration and invasion of target cells.135 The TGF-β1/Smads pathway was an important mechanism for bone marrow-derived MSCs to induce EMT in breast cancer cells.136 The Wnt/β-catenin signaling pathway and Wnt activity are associated with ovarian cancer classification, EMT, chemotherapy resistance, and poor prognosis. The gene discussed is TGFB1; the disease is ovarian cancer.