Late fetal liver hematopoiesis was thought to primarily rely on hematopoietic stem cells (HSCs). Using new genetic-tracing tools, a study shows that EVI1-positive HSCs mainly undergo expansion in the fetal liver, while differentiated blood cell production depends on HSC-independent intermediate hematopoietic progenitors.
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Azzoni, E., Fantin, A. Fetal liver hematopoiesis revisited: a precast hierarchy. Nat Cardiovasc Res 1, 872–873 (2022). https://doi.org/10.1038/s44161-022-00142-5
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DOI: https://doi.org/10.1038/s44161-022-00142-5