Losma treatment also reduced, while SCH treatment blocked, hiPSC-EC differentiation in the presence of U-46619, which activated p38MAPK and ERK1/2 [35, 36] and increased the magnitude and duration of the expression of endothelial transcription factors such as Etv2, Gata-2, and Tal-1. Here, ETV2 is linked to spindle cell hemangioma.