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Antigen presenting cell response to Polysaccharide A is characterized by the generation of anti-inflammatory macrophages

ABSTRACT: Antigen presenting cell response to Polysaccharide A is characterized by the generation of anti-inflammatory macrophages

PROVIDER: PRJNA752110 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15346357.fastq.gz	Fastqsanger.gz
	SRR15346358.fastq.gz	Fastqsanger.gz
	SRR15346359.fastq.gz	Fastqsanger.gz
	SRR15346360.fastq.gz	Fastqsanger.gz

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Antigen presenting cell response to Polysaccharide A is characterized by the generation of anti-inflammatory macrophages

Project description:MHC class II positive antigen presenting cells stimulated by polysaccharide A from the capsule of Bacteroides fragilis elicits an innate immune response characterized by the induction of antigen presentation and regulatory (anti-inflammatory) pathways.

2022-03-23 | GSE181463 | GEO

Antigen presenting cell response to polysaccharide A is characterized by the generation of anti-inflammatory macrophages.

Project description:Polysaccharide A (PSA) is the immunodominant capsular carbohydrate from the gram negative commensal microbe Bacteroides fragilis that has shown remarkable potency in ameliorating many rodent models of inflammatory disease by eliciting downstream suppressive CD4+ T cells. PSA is composed of a zwitterionic repeating unit that allows it to be processed by antigen presenting cells (APCs) and presented by MHCII in a glycosylation-dependent manner. While previous work has uncovered much about the interactions between MHCII and PSA, as well as the downstream T cell response, little is known about how PSA affects the phenotype of MHCII+ APCs, including macrophages. Here, we utilized an unbiased systems approach consisting of RNAseq transcriptomics, high-throughput flow cytometry, Luminex analysis and targeted validation experiments to characterize the impact of PSA-mediated stimulation of splenic MHCII+ cells. The data revealed that PSA potently elicited the upregulation of an alternatively activated M2 macrophage transcriptomic and cell surface signature. Cell-type-specific validation experiments further demonstrated that PSA-exposed bone marrow-derived macrophages (BMDMs) induced cell surface and intracellular markers associated with M2 macrophages compared with conventional peptide ovalbumin (ova)-exposed BMDMs. In contrast to macrophages, we also found that CD11c+ dendritic cells (DCs) upregulated the pro-T cell activation costimulatory molecule CD86 following PSA stimulation. Consistent with the divergent BMDM and DC changes, PSA-exposed DCs elicited an antigen-experienced T cell phenotype in co-cultures, whereas macrophages did not. These findings collectively demonstrate that the PSA-induced immune response is characterized by both T cell stimulation via presentation by DCs, and a previously unrecognized anti-inflammatory polarization of macrophages.

| S-EPMC8934142 | biostudies-literature

Antigen Presenting Dendritic Cells

Project description:Assessing the gene expression repertoire of antigen presenting dendritic cells Keywords: other

2004-09-30 | GSE702 | GEO

Antigen presenting cells of myeloid origin

Project description:Transcriptional profiles of four different myeloid antigen presenting cell (APC) subsets (BDCA-1+ circulating myeloid dendritic cells, CD14+ monocytes, and in vitro generated immature and mature monocyte-derived dendritic cells) were used for comprehensive transcriptome analysis. Based on the gene expression profiling data, a quantitative relationship between myeloid APC in functionally related gene spaces was established. Keywords = myeloid antigen presenting cells Keywords = dendritic cell subsets Keywords: repeat sample

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Project description:Dr. van Kooyk's laboratory is exploring the function of antigen presenting cells, such as dendritic cells (DC), that regulate viral-antigen recognition, DC trafficking and T cell binding--all processes that initiate immunity or tolerance. Essential in this is the recognition of ligands by C-type lectins and the functional consequences of differential terminal glycosylation that may regulate DC function. In this study, the gene expression profile of glycosylation-related genes is examined in relation to the maturation of human antigen-presenting cells. Two pooled RNA samples, one each from immature and mature human monocyte-derived dendritic cells, were prepared and sent to Microarray Core (E). The RNA was amplified, labeled, and hybridized to the GLYCOv3 microarrays.

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Project description:Lung antigen presenting cells isolated from wild type but not Spp1-/- mice induce Th1 and Th17 cells differentiation. The goal of this study is to identify the genes differentially expressed by lung antigen presenting cells from cigarette smoke exposed mice. These genes may play crucial roles in directing Th1 and Th17 cells differentiation. Lung antigen presenting cells were isolated from lungs of two groups of wild type and Spp1-/- mice that have been exposed to cigarette smoke for 4 months. Total mRNA was extracted from these samples.

2011-07-31 | E-GEOD-30906 | biostudies-arrayexpress

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