Subsequently, we examined the expression levels of Dll4-AS and Dll4 in different mouse endothelial cell lines (Bend.3: mouse endothelial cell from cerebral cortex; EOMA: mouse endothelial cell from hemangioendothelioma; MAE: Mouse Aortic Endothelial cell; MBE: Mouse Brain capillary Endothelial cell; MS1: mouse endothelial cell from pancreas; sMHEC: Mouse Heart ECs). The gene discussed is DLL4; the disease is hemangioendothelioma.