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Comparative analysis of WT and XCR1 KO type 1 conventional dendritic cells [array]

ABSTRACT: Comparative analysis of WT and XCR1 KO type 1 conventional dendritic cells [array]

PROVIDER: PRJNA1111449 | ENA |

REPOSITORIES: ENA

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Comparative analysis of WT and XCR1 KO type 1 conventional dendritic cells [array]

Project description:XCR1 is known as a signature receptor of type 1 conventional dendritic cells To compare the transcriptomic differences of WT and XCR1 deficient type 1 conventional dendritic cells, we conducted microarry using type 1 conventional dendritic cells from WT and XCR1 KO mice

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XCR1 expression distinguishes human conventional dendritic cells type 1 with full effector functions from their immediate precursors

Project description:Dendritic cells (DCs) are major regulators of innate and adaptive immune responses. DCs can be classified into plasmacytoid DCs and conventional DCs (cDCs) type 1 and 2. Murine and human cDC1 share the mRNA expression of XCR1. Murine studies indicated a specific role of the XCR1-XCL1 axis in the induction of immune responses. Here, we describe that human cDC1 can be distinguished into XCR1- and XCR1+ cDC1 in lymphoid as well as non-lymphoid tissues. Steady state XCR1+ cDC1 display a pre-activated phenotype compared to XCR1- cDC1. Upon stimulation, XCR1+ cDC1, but not XCR1- cDC1, secreted high levels of inflammatory cytokines as well as chemokines. This was associated with enhanced activation of NK cells mediated by XCR1+ cDC1. Moreover, XCR1+ cDC1 excelled in inhibiting replication of Influenza A virus. Further, under DC differentiation conditions, XCR1- cDC1 developed into XCR1+ cDC1. After acquisition of XCR1 expression, XCR1- cDC1 secreted comparable level of inflammatory cytokines. Thus, XCR1 is a marker of terminally differentiated cDC1 that licenses the antiviral effector functions of human cDC1, while XCR1- cDC1 seem to represent a late immediate precursor of cDC1.

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XCR1+ type 1 conventional dendritic cells drive liver pathology in Non-Alcoholic Steatohepatitis.

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Thymic XCR1+ dendritic cells undergo a functional maturation fundamentally similar to that of peripheral tolerogenic XCR1+ dendritic cells

Project description:Dendritic cells (DC) play critical roles in central and peripheral T cell tolerance. DC found in the steady-state periphery undergo an homeostatic, tolerogenic, maturation that promotes interaction with naive T cells and induction of abortive responses. In contrast, thymic DC are thought to exist solely in an immature state. In this study, we show that XCR1+ thymic DC constitutively mature into a stage characterized by high levels of molecules involved in T cell activation. This unanticipated mature stage corresponded to a third of the XCR1+ thymic DC and fully accounted for their ability to cross-present self-antigens to developing T cells. Transcriptomic analysis of the XCR1+ DC found in thymus and steady-state periphery revealed that their maturation involves profound and convergent changes. Unexpectedly, maturation resulted in down-regulation of genes conferring their specific function on XCR1+ DC. Paradoxically, upon maturation, central and peripheral tolerogenic XCR1+ DC up-regulated many genes thought to drive pro-inflammatory T-cell responses. Thus, our results reveal that thymic XCR1+ DC undergo constitutive maturation and emphasize the common mechanisms operating for both central and peripheral tolerance induction by XCR1+ DC. DC were isolated from lymphoid organs as previously described (Vremec et al., 2000). DC subsets were sorted by flow cytometry according to the marker combinations described in the âcharacteristics: phenotypeâ field for each sample.

2016-08-22 | E-GEOD-71166 | biostudies-arrayexpress

Gene expression profiling of splenic XCR1+ dendritic cells from untreated or day 1.5 MCMV-infected mice

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Thymic XCR1+ dendritic cells undergo a functional maturation fundamentally similar to that of peripheral tolerogenic XCR1+ dendritic cells

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