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RORa expression is a critical checkpoint for the bifurcation of the T cell and ILC2 lineages in the embryonic thymus

ABSTRACT: RORa expression is a critical checkpoint for the bifurcation of the T cell and ILC2 lineages in the embryonic thymus

PROVIDER: PRJNA611788 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11282500.fastq.gz	Fastqsanger.gz
	SRR11282600.fastq.gz	Fastqsanger.gz
	SRR11282700.fastq.gz	Fastqsanger.gz
	SRR11282800.fastq.gz	Fastqsanger.gz
	SRR11282501.fastq.gz	Fastqsanger.gz

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Examination of RORa and GATA-3 binding sites in ILC2 by ChIP-seq

Project description:ILC2 contribute to immune homeostasis, protective immunity and tissue repair. However, an understanding of the microenvironmental factors and transcriptional circuits that support development of these innate lymphocytes within lymphoid organs, alongside their adaptive T and B cell relatives, is only starting to emerge. Here we demonstrate that functional ILC2 arise in the embryonic thymus, from shared T cell precursors, and precede the emergence of CD4+CD8+ (double-positive) T cells. Strikingly, RORa expression repressed T cell development, whilst promoting ILC2 in the thymus. Thymic ILC2 go on to contribute to the innate type-2 response at mucosal tissues with preferential colonisation of the intestinal lamina propria. From RNAseq, ATACseq and ChIPseq data we propose a revised transcriptional circuit to explain the enigmatic co-development of T cells, ILC2 and NK cells from common progenitors in the thymus. When Notch signalling is present, Bcl11b dampens Nfil3/Id2 expression, permitting E protein-directed T cell commitment. However, concomitant expression of RORa overrides the Nfil3/Id2 repression, allowing Id2 to repress E proteins and promote ILC2 differentiation. Thus, we demonstrate that RORa expression represents a critical checkpoint at the bifurcation of the T cell and ILC2 lineages in the embryonic thymus.

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RORa expression is a critical checkpoint for the bifurcation of the T cell and ILC2 lineages in the embryonic thymus

Project description:This SuperSeries is composed of the SubSeries listed below.

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Down-regulation of E protein activity augments an ILC2 differentiation program in the thymus

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Examination of RORa and GATA-3 binding sites in ILC2 by ChIP-seq

Project description:Examination of RORa and GATA-3 binding sites in ILC2 by ChIP-seq

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