Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1047321 | ENA |
REPOSITORIES: ENA
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Project description:RNASET2-deficient leukoencephalophathy is a severe leukodystrophy affecting children with psychomotor impairements in their forst year of life. We generated the first zebrafish model for a human leukodystrophy by targetting the ortholog rnaset2 gene using mutagenesis. This zebrafish mutant recapitulated the human clinical manisfestations and developed white matter defects detectable by MRI. Additionally, this zebrafish mutant identified this disease as a lysosomal storage disorders, with RNA accumulating in neurons. To understand how accumulation of RNA in neurons trigger white matter lesions, we undertook an unbiased approach and perfored microarray analysis. We identified differentially expressed genes in mutants and the immune system as a key pathway disregulated in the zebrafish rnaset2 mutant.
2019-10-08 | GSE138493 | GEO
Project description:Hey3Met2 cells were stably transfected with plasmids encoding either wild-type RNASET2 or a catalytically dead form (whose cDNA has been previously mutagenized in the two CAS catalytic sites) or with the empty vector as a control. The control of ovarian tumorigenesis by RNASET2 occurs through modification of the cellular microenvironment and involvement of immunocompetent cells, thus providing evidence for specific modulations of cellular responses induced by RNASET2 that might underlay ovarian tumorigenesis. In order to get more inside on the effect of RNASET2 on the modulation of other genes, a whole genome expression has been run on Hey3Met2 cell transfected with wildtype or mutated RNASET2.
2011-06-01 | GSE28478 | GEO
Project description:Infantile-onset RNaseT2 deficient leukoencephalopathy is characterised by cystic brain lesions, multifocal white matter alterations, cerebral atrophy, and severe psychomotor impairment. The phenotype is indistinguishable from congenital cytomegalovirus brain infection and overlaps with typeI interferonopathies like Aicardi-Goutières syndrome, strongly suggesting a role for innate immunity in its pathophysiology. To date, pathophysiological studies have been hindered by the lack of mouse models recapitulating the neuroinflammatory encephalopathy found in patients. In this study, we generated Rnaset2-/- mice using CRISPR/Cas9-mediated genome editing. Strikingly, Rnaset2-/- mice revealed strong upregulation of interferon-stimulated genes and concurrent neuroinflammation, with infiltration of CD8+ effector memory T cells and inflammatory monocytes into the grey and white matter. Homeostatic dysfunctions in glia cells and neurons revealed by single nuclei RNA sequencing provides initial insights into the mechanism of hippocampal-accentuated brain atrophy and cognitive impairment. Thus, Rnaset2 -/- mice provide an important model, to develop therapies for inborn RNaseT2 deficiency, congenital viral brain infection and further type I interferonopathies.
2021-09-30 | GSE180138 | GEO
Project description:Hey3Met2 cells were stably transfected with plasmids encoding either wild-type RNASET2 or a catalytically dead form (whose cDNA has been previously mutagenized in the two CAS catalytic sites) or with the empty vector as a control. The control of ovarian tumorigenesis by RNASET2 occurs through modification of the cellular microenvironment and involvement of immunocompetent cells, thus providing evidence for specific modulations of cellular responses induced by RNASET2 that might underlay ovarian tumorigenesis. In order to get more inside on the effect of RNASET2 on the modulation of other genes, a whole genome expression has been run on Hey3Met2 cell transfected with wildtype or mutated RNASET2. Hey3Met2 human ovarian cancer cells were transfected with espression vectors encoding either wild type or catalitycally dead mutant RNASET2. Clones transfected with the empty vectors were used as negative controls. Three independent clones were used for the each type of transfected plasmid.
2011-06-01 | E-GEOD-28478 | biostudies-arrayexpress
Project description:Microarray expression profiling in zebrafish rnaset2 mutant
| PRJNA576178 | ENA
Project description:Background & Aims Variants in the tumor necrosis factor superfamily member 15 gene (TNFSF15, also called TL1A) have been associated with risk for inflammatory bowel diseases (IBD). TL1A affects expression of multiple cytokines to promote mucosal inflammation. Little is known about the TL1A-response pathways that regulate cytokine expression. We investigated T-cell gene expression patterns to determine the mechanisms by which TL1A regulates cytokine production, and whether these associate with outcomes of patients with Crohn’s disease (CD).Methods Peripheral T cells isolated from normal donors were cultured with TL1A. We performed gene expression profile analysis, by RNA sequencing, of subsets of interferon gamma (IFNG)-producing and non-producing cells, purified by flow cytometry. Unsupervised hierarchical clustering analysis was used to identify gene expression differences between these subsets. Ribonuclease T2 gene (RNASET2) expression and methylation were assessed by quantitative trait loci analyses. Clinical characteristics of patients (complications, resistance to therapy, recurrence time) were associated with single nucleotide polymorphisms in RNASET2. We performed motif screening to identify polymorphisms that disrupt transcription factor binding sites. Levels of RNASET2 were knocked down with small interfering RNA in CD4+ T cells and the effect on protein expression was determined by proteomic analysis and cytokine production. Cell aggregation was measured by flow cytometry. ResultsWe identified 764 genes with at least a 2-fold difference in TL1A-mediated expression between IFNG-secreting and non-secreting T cells (P<1 × 10−5). Many of these genes were located near IBD susceptibility variants. RNASET2 was the only IBD risk-associated gene with greater than 5-fold downregulation in the IFNG-secreting subset. RNASET2 disease risk variants were associated with decreased expression in peripheral and mucosal tissues and DNA hypermethylation in CD patients requiring surgical intervention. RNASET2 disease risk variants were associated in CD patients with more complicated disease or resistance to therapy, defined in part by failed response to treatment, increased length of intestinal resection, shorter time to repeat surgery, and high Rutgeerts score (>2) in post-operative endoscopy. The RNASET2 variant rs2149092 was predicted to disrupt a consensus binding site for the transcription factor ETS within an enhancer region. Expression of RNASET2 correlated with expression of ETS. RNASET2 knockdown in T cells increased expression of IFNG and ICAM1 and induced T cells aggregation. A blocking antibody against LFA1, disrupting the LFA1-ICAM1 interaction, reduced T-cell production of IFNG. Conclusions We identified decreased expression of RNASET2 as a component of TL1A-mediated increase in production of IFNG and as a potential biomarker for patients with severe CD. Further study of the role of RNASET2 in regulating mucosal inflammation may lead to development of novel therapeutic targets.
2022-10-11 | GSE215144 | GEO
Project description:To investigate the molecular pathways underlying RNASET2-mediated tumor suppression in vivo, we investigated the gene expression profile of tumor samples obtained from control and RNASET2-silenced OVCAR3 xenografts, respectively. In order to evaluate the contribution of human cancer cells and the murine host stroma to RNASET2-mediated tumorigenesis responses, total RNA extracted from tumor xenografts derived from six independent OVCAR3 cell clones (three parental and three RNASET2-silenced clones) was fluorescently labeled and hybridized to human Agilent whole-genome microarrays.
2013-05-01 | GSE43029 | GEO
Project description:To investigate the molecular pathways underlying RNASET2-mediated tumor suppression in vivo, we investigated the gene expression profile of tumor samples obtained from control and RNASET2-silenced OVCAR3 xenografts, respectively. In order to evaluate the contribution of human cancer cells and the murine host stroma to RNASET2-mediated tumorigenesis responses, total RNA extracted from tumor xenografts derived from six independent OVCAR3 cell clones (three parental and three RNASET2-silenced clones) was fluorescently labeled and hybridized to human Agilent whole-genome microarrays. Control and RNASET2-silenced OVCAR3 were injected subcutaneously into nude mice. After 39 days mice were sacrified, tumors were extracted and total RNA purified.
2013-05-01 | E-GEOD-43029 | biostudies-arrayexpress
Project description:The cystic leukoencephalopathy without megalencephaly has been defined as distinct autosomal-recessive syndrome of quasi-static encephalopathy with normo- or microcephaly, impaired psychomotor development and characteristic pattern on brain MRI. We identified mutations in the gene encoding the RNASET2 glycoprotein in seven affected individuals as the cause of disease. The results suggest that RNASET2 plays an important role in central nervous system myelination and development.
2009-06-02 | GSE11964 | GEO
Project description:Remyelination can occur naturally in demyelinating lesions, but often fails in human demyelinating diseases such as multiple sclerosis (MS). The function of the innate immune system is essential for the regenerative response, but how exactly microglia and macrophages clear myelin debris after injury and tailor a specific regenerative response is unclear. Here, we asked whether pro-inflammatory microglial/macrophage activation is required for this process. We established a novel toxin-based spinal cord model of de- and remyelination in zebrafish and showed that pro-inflammatory nuclear factor κB (NF-κB) dependent activation occurs in phagocytes rapidly after myelin injury. We found that the pro-inflammatory response depends on myeloid differentiation primary response 88 (MyD88), the canonical adaptor for inflammatory signaling pathways downstream of toll-like receptors (TLRs). MyD88-deficient mice and zebrafish were impaired not only in the degradation of myelin debris, but also in initiating the generation of new oligodendrocytes for myelin repair. We identified reduced generation of tumor necrosis factor-α (TNF-α) in lesions of MyD88-deficient animals, a pro-inflammatory molecule that was able to induce the generation of new oligodendrocytes. Our study shows that pro-inflammatory phagocytic signaling is an evolutionary conserved mechanism necessary for degrading myelin debris, essential for inflammation resolution, and for initiating the secretion of pro-inflammatory myelin repair molecules.
2020-02-17 | PXD014625 | Pride