Mus musculus
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ABSTRACT:
PROVIDER: PRJNA147143 | ENA |
REPOSITORIES: ENA
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Project description:Alternatively activated macrophages (AAMφs) play important roles in a number of Th2 driven pathologies including asthma and allergy, and a number of parasitic infections. Our studies, and those of others, investigating the pathologies associated with infection with the helminth Schistosoma japonicum implicate a role for AAMφs in fibrosis and immunomodulation.. In the present study we show that S. japonicum-secreted egg antigens are able to induce the alternative activation of macrophages as characterised by the induction of Chi3l3 and Arg1 expression. Retnla, another common marker of AAMφs, was not consistently induced in these macrophages suggesting that the specific function of these cells may differ to those induced by S. mansoni and other parasites. Closer examination of the gene expression profile and functionality of these cells identified pathways independent of Retnla expression that could be important for their immunomodulatory activity such as modulating expression of T-cell co-stimulatory molecules and chemokines. In vivo generated S. japonicum soluble egg antigen stimulated AAMφs also exhibited a reduction in their phagocytic ability likely related to the induction of IL4 and decreased expression of cell surface receptors. Additionally these macrophages exhibited reduced expression of Toll-like receptors (TLRs) and an associated reduction in responsiveness to stimulation with TLR ligands. We did not observe pathways that would suggest that AAMφs have a direct profibrotic activity. Taken together, these data describe a mechanism by which alternative activation of macrophages may be induced during S. japonicum infection and highlight the importance of the context of activation in directing AAMφ phenotype and function. The gene expression profile of Schistosoma japonicum soluble egg antigen (SEA)-stimulated macrophages was compared with that of PBS stimulated controls. Macrophages were isolated from the peritoneal cavity of BALB/c mice (n=6 per group) stimulated by intraperitoneal injection with SEA or PBS. The macrophages were pooled and RNA was extracted from these cells. Microarray analysis was performed on cRNA synthesised from total RNA derived from these macrophages. The experiment was performed twice creating two biological replicates. Fold-change (relative to the respective PBS control) reported in supplementary file linked below.
2011-10-04 | E-GEOD-32621 | biostudies-arrayexpress
Project description:Macrophages initiate, modulate, and also serve as final effector cells in immune responses during course of schistosomal infections. Presently, we discussed the roles of the gene expression profile and functional changes of macrophages in immune responses against the Schistosoma japonicum by microarray experiments. Hierarchical clustering analysis demonstrated that a significant switch in gene transformation associated with a type-1 response and linked with a type-2 cytokine phenotype occurs between 4.5 and 8 weeks post-infection. Moreover, the gene profiles at 3 later time-points following egg challenge were similar in complexity and magnitude. These data also showed that there are mostly inhibition in gene expression related TLR, IFN, MHC and TNFrsf at the switch between 4.5 and 8 weeks post-infection, It is suggested that these immunomodulatory genes may be down-regulated in resistance against S. japonicum eggs and granuloma pathology. The induction of alternatively activated macrophage was important for dampening the inflammation in hepatic granulomas and contributing to a decrease in cytotoxicity. The genes expressions involved in repair/remodeling during liver fibrosis were also observed after eggs production. Understanding these immune mechanisms related to parasite resistance, pathology, and growth with regard to the disease will be helpful in further studies on S. japonicum. Two-condition experiment, Control mice vs. Schistosoma japonicum-infected mice. replicates: 2 infected replicates. Different post-infection weeks
2013-05-09 | E-GEOD-46719 | biostudies-arrayexpress
Project description:Alternatively activated macrophages (AAMφs) play important roles in a number of Th2 driven pathologies including asthma and allergy, and a number of parasitic infections. Our studies, and those of others, investigating the pathologies associated with infection with the helminth Schistosoma japonicum implicate a role for AAMφs in fibrosis and immunomodulation.. In the present study we show that S. japonicum-secreted egg antigens are able to induce the alternative activation of macrophages as characterised by the induction of Chi3l3 and Arg1 expression. Retnla, another common marker of AAMφs, was not consistently induced in these macrophages suggesting that the specific function of these cells may differ to those induced by S. mansoni and other parasites. Closer examination of the gene expression profile and functionality of these cells identified pathways independent of Retnla expression that could be important for their immunomodulatory activity such as modulating expression of T-cell co-stimulatory molecules and chemokines. In vivo generated S. japonicum soluble egg antigen stimulated AAMφs also exhibited a reduction in their phagocytic ability likely related to the induction of IL4 and decreased expression of cell surface receptors. Additionally these macrophages exhibited reduced expression of Toll-like receptors (TLRs) and an associated reduction in responsiveness to stimulation with TLR ligands. We did not observe pathways that would suggest that AAMφs have a direct profibrotic activity. Taken together, these data describe a mechanism by which alternative activation of macrophages may be induced during S. japonicum infection and highlight the importance of the context of activation in directing AAMφ phenotype and function.
2011-10-05 | GSE32621 | GEO
Project description:Macrophages initiate, modulate, and also serve as final effector cells in immune responses during course of schistosomal infections. Presently, we discussed the roles of the gene expression profile and functional changes of macrophages in immune responses against the Schistosoma japonicum by microarray experiments. Hierarchical clustering analysis demonstrated that a significant switch in gene transformation associated with a type-1 response and linked with a type-2 cytokine phenotype occurs between 4.5 and 8 weeks post-infection. Moreover, the gene profiles at 3 later time-points following egg challenge were similar in complexity and magnitude. These data also showed that there are mostly inhibition in gene expression related TLR, IFN, MHC and TNFrsf at the switch between 4.5 and 8 weeks post-infection, It is suggested that these immunomodulatory genes may be down-regulated in resistance against S. japonicum eggs and granuloma pathology. The induction of alternatively activated macrophage was important for dampening the inflammation in hepatic granulomas and contributing to a decrease in cytotoxicity. The genes expressions involved in repair/remodeling during liver fibrosis were also observed after eggs production. Understanding these immune mechanisms related to parasite resistance, pathology, and growth with regard to the disease will be helpful in further studies on S. japonicum.
2013-05-09 | GSE46719 | GEO
Project description:Migrating schistosomula are an important stage of the schistosome lifecycle and represent a key target for elimination of infection by natural and vaccine induced host immune responses. To gain a better understanding of how these parasites initiate a primary host immune response we have characterised the host lung response to migrating Schistosoma japonicum schistosomula using a combination of histochemistry, microarrays and quantitative cytokine analysis. Our data suggest that, during a S. japonicum infection, actively migrating schistosomula induce a Type-2 cytokine response in the lung that may support the subsequent development of a CD4+ T helper 2 (Th2) response against egg antigens. This hypothesis is supported by the fact that schistosomula and schistosome eggs are known to express important Th2-inducing antigens such as omega-1, peroxiredoxin, kappa-5 and IPSE/alpha1. The host lung response to migrating schistosomula was associated with increased numbers of macrophages and expression of markers for alternatively activated macrophages (AAMφ) in the lung. Activation of AAMφ in the lung and at the systemic level could lead to the modulation of the host immune response to favour parasite survival. Induction of these cells could also contribute to diminished inflammatory responses to, for example, allergy and asthma that are known to be associated with helminth infections. These data enhance our understanding of the mechanisms whereby schistosomes may evade the immune response and the mechanisms by which schistosome infection can help influence the host response following exposure to allergenic stimuli. The gene expression profile of the murine lung was examined at 3 days weeks post infection with 500 Schistosoma japonicum cercariae in comparison to that of uninfected controls. Microarray analysis was performed on cRNA synthesised from total RNA derived from the lungs of 3 individual mice per group.
2011-02-10 | E-GEOD-27171 | biostudies-arrayexpress
Project description:Secreted extracellular vesicles play an important role in pathogen-host interactions. Increased knowledge of schistosome extracellular vesicles could provide insights into schistosome-host interactions and enable the development of novel intervention strategies to inhibit parasitic processes and lessen disease transmission. Here, we describe biochemical characterization of Schistosoma japonicum exosome-like vesicles (S. japonicum EVs).
2018-10-26 | PXD003368 | Pride
Project description:Secreted extracellular vesicles play an important role in pathogen-host interactions. Increased knowledge of schistosome extracellular vesicles could provide insights into schistosome-host interactions and enable the development of novel intervention strategies to inhibit parasitic processes and lessen disease transmission. Here, we describe biochemical characterization of Schistosoma japonicum exosome-like vesicles (S. japonicum EVs) by LC-MS/MS
2018-10-27 | PXD003364 | Pride
Project description:To date, 115 miRNAs genes (precursors) have been registered in miRBase for Schistosoma mansoni, and 56 for Schistosoma japonicum (225 and 79 mature miRNA, respectively). miRNAs have not been systematically described in Schistosoma haematobium. Our aim in this study was to systematically characterize and quantify miRNA in Schistosoma by species, developmental stage and sex and to test the usefulness of this characterization in biomarker discovery for infection. We found read evidence for the expression of 65/225 (36 precursors) known S. mansoni miRNA and 76/79 (55 precursors) of the known S. japonicum miRNA. We report a handful of novel miRNA in each of these species and provide a curated list of S. haematobium miRNA. We report differences of miRNA expression by species, sex and developmental stages. Lastly, we present preliminary results of miRNA deep sequencing from infected specimens (mouse and human).
2020-06-29 | GSE116546 | GEO
Project description:We report on the small RNA profiles of Schistosoma japonicum (S. japonicum) miRNAs using small RNA deep sequencing in the key stages of male-female pairing, gametogenesis, and egg production. Examination of different miRNAs between males and females in Schistosoma japonicum
2016-01-07 | E-GEOD-74654 | biostudies-arrayexpress