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Transitional dendritic cells are distinct from conventional DC2 precursors and mediate proinflammatory antiviral responses

ABSTRACT: Transitional dendritic cells are distinct from conventional DC2 precursors and mediate proinflammatory antiviral responses

PROVIDER: PRJNA816532 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18334140_1.fastq.gz	Fastqsanger.gz
	SRR18334140_2.fastq.gz	Fastqsanger.gz
	SRR18334141_1.fastq.gz	Fastqsanger.gz
	SRR18334141_2.fastq.gz	Fastqsanger.gz
	SRR18334142_1.fastq.gz	Fastqsanger.gz

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Project description:High-dimensional approaches revealed emerging heterogeneity within dendritic cells (DC), including a population of transitional DC (tDC) present in mouse and human. However, tDC origin and relationship to other DC subsets are not fully understood. Here, we show that tDC are distinct from other well-characterized DC and conventional DC precursors (pre-cDC). We demonstrate that tDC originate from bone marrow progenitors shared with plasmacytoid DC (pDC). In the periphery, tDC contribute to the pool of ESAM+ type 2 DC (DC2), and these DC2 harbor pDC-related developmental features. Different from pre-cDC, tDC have lower turnover, capture antigen, respond to stimuli, and activate antigen-specific naïve T cells, all characteristics of differentiated DC. Different from pDC, viral sensing by tDC results in IL-1b secretion and fatal immune pathology in a murine coronavirus model. Our findings suggest that tDC are a distinct pDC-related subset with a DC2 differentiation potential and unique pro-inflammatory function during viral infections.

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Project description:High-dimensional approaches have revealed heterogeneity amongst dendritic cells (DCs), including a population of transitional DCs (tDCs) in mice and humans. However, the origin and relationship of tDCs to other DC subsets has been unclear. Here we show that tDCs are distinct from other well-characterized DCs and conventional DC precursors (pre-cDCs). We demonstrate that tDCs originate from bone marrow progenitors shared with plasmacytoid DCs (pDCs). In the periphery, tDCs contribute to the pool of ESAM+ type 2 DCs (DC2s), and these DC2s have pDC-related developmental features. Different from pre-cDCs, tDCs have less turnover, capture antigen, respond to stimuli and activate antigen-specific naïve T cells, all characteristics of differentiated DCs. Different from pDCs, viral sensing by tDCs results in IL-1β secretion and fatal immune pathology in a murine coronavirus model. Our findings suggest that tDCs are a distinct pDC-related subset with a DC2 differentiation potential and unique proinflammatory function during viral infections.

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