Requirement of Runx1/AML1/PEBP2αB for the generation of haematopoietic cells from endothelial cells

Recent studies revealing that endothelial cells derived from E8.5‐E10.5 mouse embryos give rise to haematopoietic cells appear to correspond to previous histological observations that haematopoietic cell clusters are attached to the ventral aspect of dorsal aorta in such a way as if they were budding from the endothelial cell layer. Gene disruption studies have revealed that Runx1/AML1 is required for definitive haematopoiesis but not for primitive haematopoiesis, but the precise stage of gene function is not yet known.

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