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Murine study of combined LPS and modified immunoglobulins associated gene expression changes in vivo

ABSTRACT: We systematically assessed the transcriptomic changes of lipopolysaccharides (LPS) of mice upon stimulation with immunoglobulins (IVIg), modified immunoglobulins (modIVIg) or vehicle controls in kidney, blood and liver in vivo. Data indicate different in vivo responses to LPS in conjunction with IVIg, modIVIg or vehicle.

ORGANISM(S): Mus musculus

PROVIDER: GSE55694 | GEO | 2014/07/01

SECONDARY ACCESSION(S): PRJNA240567

REPOSITORIES: GEO

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Murine study of combined LPS and modified immunoglobulins associated gene expression changes in vivo

Project description:We systematically assessed the transcriptomic changes of lipopolysaccharides (LPS) of mice upon stimulation with immunoglobulins (IVIg), modified immunoglobulins (modIVIg) or vehicle controls in kidney, blood and liver in vivo. Data indicate different in vivo responses to LPS in conjunction with IVIg, modIVIg or vehicle. RNA from murine liver and kidney tissues (LPS+vehicle, LPS+IVIg, LPS+modIVIg; four samples each group) as well as circulating leukocytes from WBC (three samples each group) was extracted and subject to microarray analysis for comparison of transcriptomic responses. Normalization and quality control was performed for each organ separately.

2014-07-01 | E-GEOD-55694 | biostudies-arrayexpress

Deep proteome analysis of mouse brains from wild-type, LPS-induced, and drug-treated mice groups

Project description:We studied the effect of bacterial Lipopolysaccharides on inducing neuroinflammation in mice. In addition, we investigated the effect of novel LAT1-utilizing anti-inflammatory derivatives on reversing this LPS-induced neuroinflammation status. Thus, we performed deep proteome analysis of mouse brains after treatment with vehicle, LPS, and LPS with LAT1-utilizing derivatives. The objective is to follow the different inflammatory biomarkers in the mouse brain and explain the inflammatory process after the LPS treatment with and without the LAT1-utilizing prodrugs.

2022-10-25 | PXD030838 | Pride

Involvement of B cells, immunoglobulins, and Syk in the pathogenesis of abdominal aortic aneurysm II

Project description:Background—Abdominal aortic aneurysm (AAA) is a potentially life-threatening disease that is common in older individuals. Currently, therapeutic options are limited to surgical interventions. Although it has long been known that AAA tissue is enriched in B cells and immunoglobulins, their involvement in AAA pathogenesis remains controversial. Methods and Results— We investigated the role of B cells and immunoglobulins in a murine model of AAA, induced with a periaortic application of CaCl2, and in human AAA. Both human and mouse AAA tissue showed B cell infiltration. Mouse AAA tissue showed deposition of IgG and activation of Syk, a key molecule in B cell activation and immunoglobulin function, which were localized to infiltrating cells including B cells and macrophages. B cell-deficient muMT mice showed suppression of AAA development that was associated with reduced activation of Syk and less expression of Mmp9. Administration of exogenous immunoglobulins restored the blunted Syk activation and AAA development in muMT mice. Additionally, exogenous immunoglobulins induced IL-6 and MMP9 secretions in human AAA tissue cultures. Furthermore, administration of R788, a specific Syk inhibitor, suppressed AAA expansion, reduced inflammatory response, and reduced immunoglobulin deposition in AAA tissue. Conclusions—From these results, we concluded that B cells and immunoglobulins participated in AAA pathogenesis by promoting inflammatory and tissue destructive activities. Finally, we identified Syk as a potential therapeutic target.

2018-04-25 | GSE109639 | GEO

Involvement of B cells, immunoglobulins, and Syk in the pathogenesis of abdominal aortic aneurysm I

2018-04-25 | GSE109638 | GEO

RNA-seq analysis of PMA treament with or without LPS on human monocytic cell line THP1

Project description:Transcriptome analysis of the human monocytic cell line THP1 (ATCC TIB-202) treated or not with phorbol myristate acetate (PMA) +/- lipopolysaccharides-lipopolysaccharides binding protein (LPS-LBP)

2018-07-17 | GSE117162 | GEO

Expression data of the livers of male C57Bl6/N mice after i.p. injection of lipopolysaccharide (LPS)

Project description:Lipopolysaccharides (LPS) are found in the outer membrane of Gram-negative bacteria. The intraperitoneal (i.p.) application of LPS into mice represents a frequently applied experimental model to induce hepatic and systemic inflammation.

2021-06-30 | GSE166488 | GEO

Mus musculus

Project description:Murine study of combined LPS and modified immunoglobulins associated gene expression changes in vivo

| PRJNA240567 | ENA

Repeated systemic challenge with lipopolysaccharides induces dopaminergic neurodegeneration in the brain by activation of the complement-phagosome pathway

Project description:Systemic inflammatory reactions mediated by chronic infections activate microglia in the central nervous system (CNS) and have been postulated to exacerbate neurodegenerative diseases. We now demonstrate in vivo that repeated systemic challenge of mice with bacterial lipopolysaccharides (LPS) maintains an elevated microglial inflammatory response and triggers neurodegeneration. Repeated chronic intraperitoneal application of LPS over four consecutive days induced loss of dopaminergic neurons in the substantia nigra, a process that was accompanied by decreased levels of dopamine in the striatum. In contrast, total cumulative LPS dose given intraperitoneally within a single acute application did not induce a decrease in dopamine levels nor neurodegeneration. Mice that received repeated systemic LPS application showed increased microglial activation, elevated production of proinflammatory cytokines and activation of the classical complement and its associated phagosome pathway in the brain. Loss of dopaminergic neurons induced by repeated systemic LPS application was rescued in complement C3 deficient mice, confirming an involvement of the complement system in neurodegeneration. Thus, our data demonstrate that repeated systemic exposure to bacterial LPS induces a microglial phagosomal inflammatory response, leading to complement-dependent damage of dopaminergic neurons.

2014-07-11 | E-MTAB-1770 | biostudies-arrayexpress

Transcription profiling of human monocyte cell line treated with medicinal extract from Agaricus blazei Murill

Project description:The effect on gene expression of an extract from a medicinal mushroom (Agaricus blazei Murill)were compared with the effect of lipopolysaccharides (LPS). Both are potent immunomodulators. The study used a monocyte cell line.

2013-01-29 | E-BASE-1 | biostudies-arrayexpress

Intravenous immunoglobulin (IVIg) ameliorates disease in a murine model of anti-laminin 332 mucous membrane pemphigoid

Project description:Intravenous immunoglobulin (IVIg) is used to treat mucous membrane pemphigoid (MMP), although its therapeutic effectivity is not sufficiently supported by randomized controlled clinical trials and its mode of action is only insufficiently understood. We have examined the effect of IVIg in a mouse model of anti-laminin 332 MMP and found that IVIg ameliorates both cutaneous and mucosal inflammatory lesions. Our investigation into the modes of action of IVIg in MMP indicated effective antiinflammatory mechanisms beyond the enhanced degradation of IgG mediated through inhibition of the neonatal Fc receptor. Our results suggest that IVIg curbs the activation of neutrophils at several levels. This includes a direct, immediate inhibitory effect on neutrophil activation by immune complexes but not C5a which blunts the release of reactive oxygen species and leukotriene B4 from neutrophils. IVIg also suppresses the formation of neutrophil extracellular traps in response to Ca2+ ionophore. In vivo treatment with IVIg altered the transcriptome of blood leukocytes and bone marrow neutrophils towards less proinflammatory phenotypes. Collectively, our results support the effectivity of IVIg in the treatment of MMP and indicate that effects on neutrophils at multiple levels may significantly contribute to its therapeutic effects.

2024-04-10 | GSE263026 | GEO

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