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Hematopoietic Cytokines Can Instruct Lineage Choice
Michael A. Rieger,
Philipp S. Hoppe,
Benjamin M. Smejkal,
Andrea C. Eitelhuber,
Timm Schroeder*
Abstract:
The constant regeneration of the blood system during hematopoiesisrequires tightly controlled lineage decisions of hematopoieticprogenitor cells (HPCs). Because of technical limitations, differentiationof individual HPCs could not previously be analyzed continuously.It was therefore disputed whether cell-extrinsic cytokines caninstruct HPC lineage choice or only allow survival of cellsthat are already lineage-restricted. Here, we used bioimagingapproaches that allow the continuous long-term observation ofindividual differentiating mouse HPCs. We demonstrate that thephysiological cytokines, macrophage colony-stimulating factorand granulocyte colony-stimulating factor, can instruct hematopoieticlineage choice.
Institute of Stem Cell Research, Helmholtz Zentrum München—German Research Center for Environmental Health, Neuherberg-Munich, Germany.
* To whom correspondence should be addressed. E-mail: timm.schroeder{at}helmholtz-muenchen.de
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