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The Tumor Microenvironment Shapes Innate Lymphoid Cells in Patients with Hepatocellular Carcinoma

ABSTRACT: The Tumor Microenvironment Shapes Innate Lymphoid Cells in Patients with Hepatocellular Carcinoma

PROVIDER: PRJNA744903 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15070700_1.fastq.gz	Fastqsanger.gz
	SRR15070700_2.fastq.gz	Fastqsanger.gz
	SRR15070701_1.fastq.gz	Fastqsanger.gz
	SRR15070701_2.fastq.gz	Fastqsanger.gz
	SRR15070702_1.fastq.gz	Fastqsanger.gz

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The Tumor Microenvironment Shapes Innate Lymphoid Cells in Patients with Hepatocellular Carcinoma

Project description:The Tumor Microenvironment Shapes Innate Lymphoid Cells in Patients with Hepatocellular Carcinoma

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The Tumor Microenvironment Shapes Innate Lymphoid Cells in Patients with Hepatocellular Carcinoma

Project description:Objective: Hepatocellular carcinoma (HCC) represents a typical inflammation-associated cancer. Tissue resident innate lymphoid cells (ILCs) have been suggested to control tumor surveillance. Here we studied how the local cytokine milieu controls ILCs in HCC. Design: We performed bulk RNA sequencing of HCC tissue as well as flow cytometry and single-cell RNA sequencing of enriched ILCs from non-tumor liver, margin and tumor core derived from 48 HCC patients. Simultaneous measurement of protein and RNA expression at the single-cell level (AbSeq) identified precise signatures of ILC subgroups. In-vitro culturing of ILCs was used to validate findings from in-silico analysis. Analysis of RNA-sequencing data from large HCC cohorts allowed stratification and survival analysis based on transcriptomic signatures. Results: RNA sequencing of tumor, non-tumor and margin identified tumor-dependent gradients of which were not only associated with poor survival but also control ILC plasticity. Single-cell RNA sequencing and flow cytometry of ILCs from HCC livers identified NK-like cells in the non-tumor tissue, losing their cytotoxic profile as they transitioned into tumor ILC1 and NK-like-ILC3 cells. Tumor ILC composition was mediated by cytokine gradients that directed ILC plasticity towards activated tumor ILC2s. This was liver-specific and not seen in ILCs from PBMC. Patients with high ILC2/ILC1 ratio expressed IL-33 in the tumor that promoted ILC2 generation which was associated with better survival. Conclusion: Our results suggest that the tumor cytokine milieu controls ILC composition and HCC outcome. Specific changes of cytokines modify ILC composition in the tumor by inducing plasticity and alter ILC function.

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The Tumor Microenvironment Shapes Innate Lymphoid Cells in Patients with Hepatocellular Carcinoma

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Early innate lymphoid cell progenitor

Project description:We identified a new type of bone marrow progenitors termed early innate lymphoid cell progenitor (EILP) using TCF-1 GFP reporter mice. We compared the transcriptomes of early innate lymphoid cell progenitors (EILP) with other early progenitors, including HSC, LMPP, CMP, CLP, ETP and DN3.

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Group 2 innate lymphoid cells promote inhibitory synapse development and social behavior [snRNA-Seq]

Project description:The innate immune system shapes brain development and is implicated in neurodevelopmental diseases. It is critical to define the relevant immune cells and signals and their impact on brain circuits. Here we show that group 2 innate lymphoid cells (ILC2s) and their cytokine Interleukin-13 (IL-13) signal directly to inhibitory interneurons to increase inhibitory synapse density in the developing brain. ILC2s expanded and produced IL-13 in the developing brain meninges. Loss of ILC2s or IL-13 signaling to interneurons decreased inhibitory, but not excitatory, cortical synapses. Conversely, ILC2s and IL-13 were sufficient to increase inhibitory 30 synapses. Loss of this signaling pathway led to selective impairments in social interaction. These data define a type 2 neuroimmune circuit in early life that shapes inhibitory synapse development and behavior.

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Intestinal fibroblastic reticular cell niches control innate lymphoid cell homeostasis and function - Innate lymphoid cells

Project description:Innate lymphoid cells (ILC) in the small intestine govern immune homeostasis and protect the host against gut pathogens. While distinct cell-intrinsic signals have been identified that determine ILC development and differentiation, it has remained unclear which cell population regulates ILC sustenance. Using unbiased single cell RNA transcriptomic analysis of intestinal fibroblasts, we have identified a specialized Ccl19-expressing fibroblastic reticular cell (FRC) population that underpins solitary intestinal lymphoid tissue (SILT) structures including cryptopatches and isolated lymphoid follicles. Conditional ablation of lymphotoxin-β receptor (LTβR) signalling in SILT FRC impeded the maturation of isolated lymphoid follicles and blocked ILC maintenance through the downregulation of IL-7, consequently resulting in the elevated susceptibility to bacterial infection. Moreover, specific Ltbr ablation in FRC during adulthood revealed that constant LTβR-dependent FRC-ILC interaction is required to maintain SILT structures and ILC populations. Taken together, our study unveils a critical intestinal FRC niche that secures protective gut immunity.

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