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. 2015 Dec 17;163(7):1663-77.
doi: 10.1016/j.cell.2015.11.013. Epub 2015 Nov 25.

Transcriptional Heterogeneity and Lineage Commitment in Myeloid Progenitors

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Transcriptional Heterogeneity and Lineage Commitment in Myeloid Progenitors

Franziska Paul et al. Cell. .
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  • Cell. 2016 Jan 14;164(1-2):325

Abstract

Within the bone marrow, stem cells differentiate and give rise to diverse blood cell types and functions. Currently, hematopoietic progenitors are defined using surface markers combined with functional assays that are not directly linked with in vivo differentiation potential or gene regulatory mechanisms. Here, we comprehensively map myeloid progenitor subpopulations by transcriptional sorting of single cells from the bone marrow. We describe multiple progenitor subgroups, showing unexpected transcriptional priming toward seven differentiation fates but no progenitors with a mixed state. Transcriptional differentiation is correlated with combinations of known and previously undefined transcription factors, suggesting that the process is tightly regulated. Histone maps and knockout assays are consistent with early transcriptional priming, while traditional transplantation experiments suggest that in vivo priming may still allow for plasticity given strong perturbations. These data establish a reference model and general framework for studying hematopoiesis at single-cell resolution.

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