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Loss of epigenetic modifications on the inactive X chromosome and sex-biased gene expression profiles in B cells from NZB/W F1 mice with lupus-like disease

ABSTRACT: Loss of epigenetic modifications on the inactive X chromosome and sex-biased gene expression profiles in B cells from NZB/W F1 mice with lupus-like disease

PROVIDER: PRJNA589078 | ENA |

REPOSITORIES: ENA

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Loss of epigenetic modifications on the inactive X chromosome and sex-biased gene expression profiles in B cells from NZB/W F1 mice with lupus-like disease

Project description:We report loss of epigentic silencing marks on the inactive X on female mice with lupus like disease, and find novel sex differences in gene expression between female and male mice with late stage disease.

2019-11-13 | GSE140277 | GEO

Effect of Sirolimus treatment on lupus nephritis in NZB/W F1 female mice

Project description:NZB/WF1 female mice spontaneously develop autoimmune lupus nephritis. Expression profiling of kidney tissue from (a) 12 week NZB/W F1 female mice defined as asymptomatic for lupus nephritis, (b) 36 and 42 week NZB/W F1 female mice defined as diseased/symptomatic for lupus nephritis and (c) 36 and 42 week NZB/W F1 female mice that are diseased/symptomatic for lupus nephritis and treated with Sirolimus was carried out. The goal of the study was to identify genes associated with lupus nephritis and modulated by Sirolimus, an inhibitor of mTOR. In addition, lupus nephritis genes resistant to Sirolimus therapy were also identfied This series of samples comprises of kidney tissue from (a) 12 week old NZB/W F1 female mice defined as asymptomatic for lupus nephritis (N=4), (b) 36 (N=3) and 42 week (N=3) old NZB/W F1 female mice defined as diseased/symptomatic for lupus nephritis and (c) 36 (N=3)and 42 (N=3) week old NZB/W F1 female mice that are asymptomatic for lupus nephritis on treatment with Sirolimus

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Expression data from macrophages isolated from lupus NZB/W mouse kidneys prenephritic, nephritic or after complete remission.

Project description:Renal infiltration with mononuclear cells is associated with poor prognosis in SLE. A renal macrophage/dendritic cell signature is associated with onset of nephritis in NZB/W mice and immune modulating therapies can reverse this signature and the associated renal damage despite ongoing immune complex deposition. Our findings suggest that mononuclear phagocytes with an aberrant activation profile contribute to tissue damage in lupus nephritis by mediating both local inflammation and excessive tissue remodeling. We used microarrays to analyze the gene expression of renal isolated macrophages at early stage of lupus (young) during lupus nephritis (sick) and after induction of remission (Rem) NZB/W F4/80hi mouse cells were isolated using flow cytometry; RNA from cells (young, sick and after complete remission) was extracted and processed for hybridization on Affymetrix microarrays.

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Loss of epigenetic modifications on the inactive X chromosome and sex-biased gene expression profiles in B cells from NZB/W F1 mice with lupus-like disease.

Project description:The mechanisms underlying the female-bias in autoimmunity are poorly understood. The contribution of genetic and epigenetic factors from the inactive X chromosome (Xi) are beginning to emerge as critical mediators of autoimmunity in females. Here, we ask how epigenetic features of the Xi change during disease development in B cells from the NZB/W F1 spontaneous mouse model of lupus, which is female-biased. We find that Xist RNA becomes increasingly mislocalized from the Xi with disease onset. While NZB/W F1 naïve B cells have H3K27me3 foci on the Xi, which are missing from healthy C57BL/6 and BALB/c mice, these foci are progressively lost in stimulated B cells during disease. Using single-molecule RNA FISH, we show that the X-linked gene Tlr7 is biallelically expressed in ~20% of NZB/W F1 B cells, and that the amount of biallelic expression does not change with disease. We also present sex-specific gene expression profiles for diseased NZB/W F1 B cells, and find female-specific upregulation of 20 genes, including the autoimmunity-related genes Cxcl13, Msr1, Igj, and Prdm1. Together, these studies provide important insight into the loss of epigenetic modifications from the Xi and changes with gene expression in a mouse model of female-biased SLE.

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Expression data from macrophages isolated from lupus NZB/W mouse kidneys prenephritic, nephritic or after complete remission.

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2016-09-06 | GSE86425 | GEO

Whole blood gene expression profiles from a lupus nephritis mouse model: SNF1 (SWR X NZB F1) mice treated with pristane

Project description:We characterized the longitudinal gene expression profiles of whole blood from a novel lupus model nephritis: SNF1 (SWR X NZB F1) mice treated with pristane. Genes from interferon, plasma cell, neutrophil, T-cell and protein synthesis signatures were differentially expressed in the pristane-SNF1 model compared to the untreated matched control animals.

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