The transcription factor TCF-1 enforces commitment to the innate lymphoid cell lineage

Abstract : Innate lymphoid cells (ILCs) play important functions in immunity and tissue homeostasis, but their development is poorly understood. Through the use of single-cell approaches, we examined the transcriptional and functional heterogeneity of ILC progenitors, and studied the precursor-product relationships that link the subsets identified. This analysis identified two successive stages of ILC development within T cell factor 1-positive (TCF-1+) early innate lymphoid progenitors (EILPs), which we named 'specified EILPs' and 'committed EILPs'. Specified EILPs generated dendritic cells, whereas this potential was greatly decreased in committed EILPs. TCF-1 was dispensable for the generation of specified EILPs, but required for the generation of committed EILPs. TCF-1 used a pre-existing regulatory landscape established in upstream lymphoid precursors to bind chromatin in EILPs. Our results provide insight into the mechanisms by which TCF-1 promotes developmental progression of ILC precursors, while constraining their dendritic cell lineage potential and enforcing commitment to ILC fate.
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Submitted on : Monday, August 12, 2019 - 3:45:34 PM
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Christelle Harly, Devin Kenney, Gang Ren, Binbin Lai, Tobias Raabe, et al.. The transcription factor TCF-1 enforces commitment to the innate lymphoid cell lineage. Nature Immunology, Nature Publishing Group, 2019, Epub ahead of print. ⟨10.1038/s41590-019-0445-7⟩. ⟨inserm-02265827⟩

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