Pias1 loss causes embryonic death between E9.5 and 12.5.
Pias1 ablation leads to embryonic growth retardation and promotes cell death in vivo and in vitro.
Pias1 is necessary for erythropoiesis and angiogenesis in the yolk sac.
Pias1 promotes proper vascular development in the embryo proper.
Pias1 ablation in endothelial cells recapitulates hematopoietic and angiogenic defects in the yolk sac.