Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA394509 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR5828154_1.fastq.gz | Fastqsanger.gz | |||
| SRR5828154_2.fastq.gz | Fastqsanger.gz | |||
| SRR5828155_1.fastq.gz | Fastqsanger.gz | |||
| SRR5828155_2.fastq.gz | Fastqsanger.gz | |||
| SRR5828156_1.fastq.gz | Fastqsanger.gz |
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Project description:ILC1 lineage identity is determined by a cis-regulatory element marked by a novel lncRNA [RNA-seq]
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Project description:Innate lymphoid cells (ILCs) comprise three groups of recently identified tissue resident immune cell lineages that play critical roles in protective immune responses and tissue homeostasis. While significant progress has been made in defining the key protein mediators of ILC development and function, how cis-acting epigenetic regulatory elements or long non-coding RNAs (lncRNAs) regulate ILCs is unknown. Herein, we describe a cis-regulatory element demarcated by a novel lncRNA that controls the maturation, function and lineage identity of group 1 ILCs while being dispensable for early ILC development and homeostasis of mature ILC2s and ILC3s. We named this ILC1-restricted lncRNA Rroid. The Rroid locus controls the functional specification and lineage identity of ILC1 by promoting chromatin accessibility and STAT5 deposition at the promoter of its neighboring gene, Id2, in response to the ILC1-specific cytokine IL-15.
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Project description:Recent studies have revealed the importance of long noncoding RNAs (lncRNAs) as tissue-specific regulators of gene expression. There is ample evidence that distinct types of vasculature undergo tight transcriptional control to preserve their structure, identity, and functions. We determined, for the first time, the global lineage-specific lncRNAome of human dermal blood and lymphatic endothelial cells (BECs and LECs), combining RNA-Seq and CAGE-Seq. A subsequent genome-wide antisense oligonucleotide-knockdown profiling of two BEC- and two LEC-specific lncRNAs identified LETR1 as a critical gatekeeper of the global LEC transcriptome. Deep RNA-DNA and RNA-protein interaction studies, and phenotype rescue analyses revealed that LETR1 is a nuclear trans-acting lncRNA modulating, via key epigenetic factors, the expression of essential target genes governing the growth and migratory ability of LECs. Together, our study provides new evidence supporting the intriguing concept that every cell type expresses precise lncRNA signatures to control lineage-specific regulatory programs.
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Project description:Innate lymphoid cells (ILC) are similar to T helper (Th) cells in expression of cytokines and transcription factors. For example, RORγt is the lineage-specific transcription factor for both ILC3 and Th17 cells. However, the ILC counterpart for BCL6-expressing T follicular helper (Tfh) cells has not been defined. Here, we report that in the ILC compartment, BCL6 is selectively co-expressed with not only CXCR5, but also RORγt and CCR6 in ILC3 from multiple tissues. BCL6-deficient ILC3 produce enhanced levels of IL-17A and IL-22. More importantly, phenotypic and single-cell ATAC-seq analysis show that absence of BCL6 in mature ILC3 increases the numbers of ILC1 and transitional cells co-expressing ILC3 and ILC1 marker genes. A lineage-tracing experiment further reveals BCL6+ ILC3 to ILC1 trans-differentiation under steady state. Lastly, microbiota promote BCL6 expression in colonic CCR6+ ILC3, and thus reinforce their stability. Collectively, our data have demonstrated that CCR6+ ILC3 have both Th17 and Tfh programs and that BCL6 expression in these cells functions to maintain their lineage identity.
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