|Title||A lineage of diploid platelet-forming cells precedes polyploid megakaryocyte formation in the mouse embryo.|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Potts KS, Sargeant TJ, Markham JF, Shi W, Biben C, Josefsson EC, Whitehead LW, Rogers KL, Liakhovitskaia A, Smyth GK, Kile BT, Medvinsky AL, Alexander WS, Hilton DJ, Taoudi S|
|Date Published||2014 Oct 23|
In this study, we test the assumption that the hematopoietic progenitor/colony-forming cells of the embryonic yolk sac (YS), which are endowed with megakaryocytic potential, differentiate into the first platelet-forming cells in vivo. We demonstrate that from embryonic day (E) 8.5 all megakaryocyte (MK) colony-forming cells belong to the conventional hematopoietic progenitor cell (HPC) compartment. Although these cells are indeed capable of generating polyploid MKs, they are not the source of the first platelet-forming cells. We show that proplatelet formation first occurs in a unique and previously unrecognized lineage of diploid platelet-forming cells, which develop within the YS in parallel to HPCs but can be specified in the E8.5 Runx1-null embryo despite the absence of the progenitor cell lineage.