Characterizing microglial gene expression in a model of chronic-relapsing EAE
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ABSTRACT:
PROVIDER: PRJNA798966 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR17680300.fastq.gz | Fastqsanger.gz | |||
| SRR17680301.fastq.gz | Fastqsanger.gz | |||
| SRR17680302.fastq.gz | Fastqsanger.gz | |||
| SRR17680303.fastq.gz | Fastqsanger.gz | |||
| SRR17680304.fastq.gz | Fastqsanger.gz |
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2016-11-21 | GSE78082 | GEO
Project description:The intention of the study was to examine the spinal cord gene expression at three different EAE disease points and to compare them with three nonimmunised, healthy rats. We immunised female DA rats with recombinant MOG-protein and sacrificed them during the acute phase of EAE defined as the first EAE attack leading to a clinical score of at least three, in the recovery phase in which the rats have begun to gain weight after the acute phase and in the relapsing phase - rats belonging to this group have been sacrificed while they were in the peak of the first relaps. Three healthy control rats, three from the acute phase of EAE (day 11 and 12 after EAE induction), three from the recovery phase (day 13 and 14 after EAE induction) and four rats from the relapsing phase (day 24 and 25 after EAE induction) have been finally sacrificed for the study.
2007-05-15 | E-MEXP-1025 | biostudies-arrayexpress
Project description:Microglial Semaphorin4D and astrocyte PlexinB1-B2 knockdown in EAE
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Project description:Objective: Connexins are known to compose gap junctions by a pair of hemichannels connected in a head to head configuration. Each hemichannel is composed by hexameric cluster of connexins. There are 20 members of connexins known as connexin family in mice, and are expressed on each cell surface in different fashion. Connexin 30 (Cx30) is mainly expressed on the surface of oligodendroglia and astrocyte in central nervous system (CNS), but little is known about the functional relevance in neuroinflammatory diseases. To elucidate the role of Cx30 in the pathogenesis of neuroinflammatory disease, we induced experimental autoimmune encephalomyelitis (EAE) on Cx30 knock-out (Cx30-KO) mice and analyzed the clinical and neuropathological findings with wild-type control. Methods: C57BL/6J and Cx30-KO mice > 12 weeks of age were used in this study (N > 3 in each group). EAE was induced by immunization of mice with MOG35-55 peptide emulsified in CFA at a dose of 200 μg per mouse, followed by the administration of pertussis toxin (500 ng per mouse) on days 0 and 2. Mice were sacrificed and brain, spinal cord, spleen, and optic nerve were harvested for immunohistochemical analyses at the acute and chronic phases of EAE. Mice with EAE were scored as follows: 0, no disease; 1, limp tail; 2, abnormal gait and hind limb weakness (shaking); 2.5, paralysis of one hind limb; 3, paralysis of two hind limb; 3.5, ascending paralysis (able to move around); 4, tetraplegia; and 5, moribund (death). At the onset and chronic stage of EAE, mononuclear cells were isolated and analyzed by flow cytometry to check the distinct characteristics of cellular populations in inflamed CNS lesions. Results: Initial screening of immunohistological difference revealed basic activation of microglial cells in naïve Cx30-KO mice without any behavioral phenotype. Clinical signs of EAE were ameliorated in the Cx30-KO mice than in the control group mainly during the chronic phase of disease course. Immunohistochemical analyses of the fourth lumbar segment, brain and optic nerve revealed increased number of microglia in the Cx30-KO mice. Flow cytometric analysis also confirmed the findings. In contrast, there were no significant change in astroglial or oligodendroglial phenotype. Conclusion: Microglial activation appears to be the key factor in the Cx30-KO mice EAE with alleviation of chronic disease scores. Unexpectedly, microglia were already activated in naïve CNS, indicating protective phenotypic change of microglia in Cx30-KO mice.
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Project description:In the absence of NR4A2 in T cells mice do not develop early acute EAE, but only a late chronic disease. We examined the mechanism by which NR4A2 can control the pathogencity of T cells in CNS autoimmune disease. To determine how NR4A2 is involved is involved in T cell pathology, we examined expression profiles of T cells during early and late diease in the presence or genetic CD4-specific absence of NR4A2. T cells infiltrating CNS tissues were isolated at peal acute EAE (D18) or during late,chronic EAE (D32). RNA expression was then analysed by genechip to determine the influence of NR4A2 in T cells on these disease stages
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Project description:Experimental autoimmune encephalomyelitis (EAE) is a murine model of multiple sclerosis, a chronic neurodegenerative and inflammatory autoimmune condition of the central nervous system (CNS). Pathology is driven by the infiltration of autoreactive CD4+ lymphocytes into the CNS where they attack neuronal sheaths causing ascending paralysis. We used an isotope-coded protein labelling approach to investigate the proteome of CD4+ cells isolated from the spinal cord and brain of mice at various stages of EAE progression in two EAE disease models; PLP139-151-induced relapsing-remitting EAE and MOG35-55-induced chronic EAE, which emulate the two forms of human multiple sclerosis. A total of 1120 proteins were quantified across disease onset, peak-disease and remission phases of disease and of these, 13 up-regulated proteins of interest were identified with functions relating to the regulation of inflammation, leukocyte adhesion and migration, tissue repair and the regulation of transcription/translation. Proteins implicated in processes such as inflammation (S100A4 and S100A9) and tissue repair (Annexin A1), which represent key events during EAE progression were validated by quantitative PCR. This is the first targeted analysis of autoreactive cells purified from the CNS during EAE, highlighting fundamental CD4+ cell-driven processes that occur during the initiation of relapse and remission stages of disease.
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Project description:TREM2 is a microglial-specific gene implicated in late-onset Alzheimer's Disease (AD). Recent studies have identified that Trem2-deficient mice exhibit transcriptional changes in microglial gene expression that minimize the upregulation of lipid metabolism and lysosomal genes in AD disease models. We find that chronic phagocytic challenge from demyelination generates similiarly attenuated expression of lysosomal and lipid metabolism genes in microglia isolated from Trem2 knockout mouse brain.
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