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Sm eggs Virtual memory T cells

ABSTRACT: Transcriptomics analysis of virtual memory CD8+ T cells after treatment with Schistosoma mansoni eggs.

ORGANISM(S): Mus musculus

PROVIDER: GSE110971 | GEO | 2018/10/05

REPOSITORIES: GEO

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Sm eggs Virtual memory T cells

Project description:Sm eggs Virtual memory T cells

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Qualitative and Quantitative proteomic analyses of Schistosoma japonicum Eggs and Egg-derived Secretory-Excretory proteins

Project description:Schistosome parasites lay up to a thousand eggs per day inside the veins of their mammalian hosts. The immature eggs deposited by females against endothelia of venules will embryonate within days. Approximately 30% of the eggs will migrate to the lumen of the intestine to continue the parasite life cycle. Many eggs, however, are trapped in the liver and intestine causing the main pathology associated with schistosomiasis mansoni and japonica, the liver granulomatous response. Excretory/Secretory egg proteins drive much of egg-induced pathogenesis of schistosomiasis mansoni, and Schistosoma japonicum induce a markedly distinct granulomatous response to that of S. mansoni.

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Transcription profiling of mouse dendritic cell line D1 treated with various compounds and infectious agents

Project description:Effect of LPS, CpG, dexamethasone, Pam3Cys, poly I:C, zymosan, Schistosoma mansoni eggs, Schistosoma mansoni shistosomula, Listeria monocytogenes, Leishmania mexicana amastigotes and Leishmania mexicana promastigotes on dendritic cell gene transcription

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Project description:A primary immune response is typically initiated in secondary lymphoid organs. Virtual memory CD8+ T (TVM) cells are antigen-inexperienced T cells of a central-memory phenotype, acquired through self antigen-driven homeostatic proliferation. Unexpectedly, here we find that, TVM cells are composed of CCR2+ and CCR2- subsets that differentially elaborate a spectrum of effector- and memory-poised functions directly in the tissue. During a primary flu infection, TVM cells rapidly infiltrate the lung in the first day and execute early viral control. TVM cells that recognize viral antigen are retained in the tissue, clonally expand independent of secondary lymphoid organs, and preferentially give rise to tissue-resident memory cells. By orchestrating an extra-lymphoid primary response, heterogenous TVM cells bridge innate reaction and adaptive memory directly in the infected tissue.

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TGF-beta treated Schistosoma mansoni

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Analysis of gene-expression in normal, unmanipulated naïve (CD44lo/CD49dlo; CD5lo/CD5hi) and Virtual memory (CD44hi/CD49dlo) T cells

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CRISPR/Cas9-mediated genome editing of Schistosoma mansoni acetylcholinesterase

Project description:Here we report successful gene knock-in (KI) in the eggs of Schistosoma mansoni by combining CRISPR/Cas9 with single-stranded oligodeoxynucleotides (ssODNs). We targeted the acetylcholinesterase (AChE) gene of S. mansoni using two synthetic guide RNAs (gRNAs), X5 and X7, respectively. Liver eggs of S. mansoni were exposed to CRISPR-vector containing X5 or X7 by electroporation. Simultaneously, eggs were transfected with a ssODN donor encoding a stop codon in all six frames. Next generation sequencing analysis revealed that CRISPR/Cas9-mediated editing in S. mansoni eggs resulted in Homology-Directed Repair (HDR) when template DNA ssODN provided. Furthermore, soluble egg antigen (SEA) from AChE-modified eggs exhibited markedly reduced AChE activity compared with controls, indicative that programmed Cas9 cleavage mutated the AChE gene. Following injection of modified schistosome eggs into the tail veins of mice, a significant decrease in granuloma size in the lungs of these animals. Notably, an enhanced Th2 response induced by eggs in lung, and splenocytes small intestine-draining mesenteric lymph node cells was also generated in mice injected with X5-KI eggs in different methods. These findings further demonstrate the power and utility of CRISPR/Cas9-based genome editing for undertaking functional genomics studies in schistosomes.

| EGAS00001004455 | EGA

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