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Intestinal helminth skews dendritic cell development to counter the anti-helminth immune response

ABSTRACT: Intestinal helminth skews dendritic cell development to counter the anti-helminth immune response

PROVIDER: PRJNA1231530 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR32569520_1.fastq.gz	Fastqsanger.gz
	SRR32569520_2.fastq.gz	Fastqsanger.gz
	SRR32569521_1.fastq.gz	Fastqsanger.gz
	SRR32569521_2.fastq.gz	Fastqsanger.gz
	SRR32569522_1.fastq.gz	Fastqsanger.gz

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Intestinal helminth skews dendritic cell development to counter the anti-helminth immune response

Project description:Intestinal dendritic cells (DC) orchestrate the adaptive immune response that balances protection against pathogens and tolerance towards harmless antigens. Yet, it remains largely unknown what molecular mechanisms underly this functional duality. Heligmosomoides polygyrus bakeri (Hpb) is a naturally occurring parasite in mice characterised by unique immune-evasion strategies that counter host protective immunity. Here, we utilised this unique infection environment to study mechanisms by which DC maintain the immune balance. In-depth characterisation of intestinal DC during Hpb infection revealed the emergence of distinct populations of DC that drive protective Th2 responses, versus others with immunoregulatory properties. We also identified that the skewing of intestinal DC towards immunoregulatory functions was due to TGFb signalling via endogenous sources or by Hpb-produced TGFb-mimic molecules. Thus, our results present a mechanistic explanation for Hpb’s ability to modulate the adaptive immune system. Furthermore, these data offer an example of how heterogeneity within the DC compartment can determine the simultaneous generation of both pro- and anti-inflammatory immune responses.

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Project description:The goal of this study was to define the regulation of Tfh cell response during intestinal helminth infection. Using the helminth Trichuris muris, we performed RNA-seq analysis on Tfh cells that develop during acute vs chronic helminth infection. We found that the transcriptomic profile of acute vs chronic induced Tfh cells are distinct and they express Th2/Th1-associated genes, respectively.

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Project description:The goal of this study was to define the regulation of Tfh cell response during intestinal helminth infection. Using the helminth Trichuris muris, we performed ATAC-seq analysis on Tfh cells that develop during acute vs chronic helminth infection. We found that the epigenetic profile of acute vs chronic induced Tfh cells are distinct by adopting Th2 and Th1 cell phenotypes, respectively. For example, Th2-associated genes such as the Il4 locus was more accessible in acute-induced Tfh cells (and vice versa for Th1-associated genes in chronic-induced Tfh cells).

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Human resistin alters lung mRNA expression from helminth-infected lungs.

Project description:Goal: To examine the effects of human resistin during helminth infection. Methodology: To examine the function of human resistin (hResistin), we utilized transgenic mice expressing the human resistin gene along with its entire regulatory region (hRetnTg+). Following infection with the helminth Nippostrongylus brasiliensis, whole lung RNA was sequenced in hRetnTg+ mice, control hRetnTg- and naïve mice. Conclusion: In hRetnTg+ mice, many genes involved in inflammation and the immune system, specifically toll-like receptor signaling and chemokines, are significantly upregulated, suggesting that human resistin promotes TLR signaling and inflammation during helminth infection. Examination of whole lung mRNA from Nippostrongylus brasiliensis-infected lungs at day 7 in mice expressing human resistin

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Hypoxia-inducible factor 2α promotes protective Th2 cell responses during intestinal helminth infection [RNA-seq]

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