TGFB1 and endometrial cancer: In addition, a connection between VISTA and TGF-β has been described.33 Hence, to elucidate the regulation of VISTA in cancer cells, we performed western blotting to assess the impact of IFN-γ and TGF-β on VISTA expression in several human ovarian or endometrial cancer cell lines, as well as an immortalised endometrial epithelial cell line.