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Effect of Dectin-1 and Fcgr2b on IVIg mediated reprogramming of monocytes

ABSTRACT: Effect of Dectin-1 and Fcgr2b on IVIg mediated reprogramming of monocytes

PROVIDER: PRJNA932448 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23364146_1.fastq.gz	Fastqsanger.gz
	SRR23364146_2.fastq.gz	Fastqsanger.gz
	SRR23364147_1.fastq.gz	Fastqsanger.gz
	SRR23364147_2.fastq.gz	Fastqsanger.gz
	SRR23364148_1.fastq.gz	Fastqsanger.gz

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Effect of Dectin-1 and Fcgr2b on IVIg mediated reprogramming of monocytes

Project description:To investigate the role of Dectin-1 and FcgRIIb on monocytes as signaling hubs for IVIg Immunoglobulin G (IgG) antibodies are major drivers of inflammation during infectious and autoimmune diseases. In pooled serum IgG (IVIg), however, antibodies have a potent immunomodulatory and anti-inflammatory activity, but how this is mediated is unclear. We studied IgG-dependent initiation of resolution of inflammation in cytokine- and autoantibody-driven models of rheumatoid arthritis and found IVIg sialylation inhibited joint inflammation while inhibition of osteoclastogenesis was sialic acid-independent. Instead, IVIg-dependent inhibition of osteoclastogenesis was abrogated in mice lacking receptors Dectin-1 or FcgRIIb. Atomistic molecular dynamics simulations and super-resolution microscopy revealed that Dectin-1 promoted FcgRIIb membrane conformations that allowed productive IgG binding and enhanced interactions with mouse and human IgG subclasses. IVIg reprogrammed monocytes via FcgRIIb-dependent signaling that required Dectin-1.

2024-12-31 | GSE224775 | GEO

Identification of IVIg regulated genes in human peripheral blood monocytes by gene expression analysis before and after IVIg infusion in CVID patients [CD3]

Project description:Identification of IVIg regulated genes in human peripheral blood monocytes by gene expression analysis before and after IVIg infusion in CVID patients

2022-05-03 | GSE158573 | GEO

Identification of IVIg regulated genes in human peripheral blood monocytes from Common Variable Immunodeficiency patients (CVID) [CD14+]

Project description:Identification of IVIg regulated genes in human peripheral blood monocytes by gene expression analysis before and after IVIg infusion in CVID patients

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Dectin-1-mediated signaling leads to characteristic gene expressions in rat mast cells

Project description:Rat mast cell line RBL-2H3 was analyzed to investigate the molecular mechanism of Dectin-1-mediated activation and responses of mast cells. Dectin-1-mediated signaling stimulated characteristic gene expression, such as MCP-1, IL-4, IL-13, TNF-αand Nfkbiz. RBL-2H3 cell line stably expressing Dectin-1 was established. Non-stimulated cells (control) compared to Dectin-1-stimulated (Curdlan) cells in order to comfirm Dectin-1-mediated signaling-inducible genes. Dectin-1-stimulated cells compared to Syk inhibitor R406-pretreated cells in order to examine the importance of Syk for Dectin-1-mediated gene up-regulations.

2014-03-27 | E-GEOD-56246 | biostudies-arrayexpress

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Effect of IVIG on the activation of plasmacytoid dendritic cells

Project description:To investigate the effect of IVIG and desialylated IVIG on the activation of plasmacytoid dendritic cells (pDCs). Human primary plasmacytoid dendritic cells were treated with TLR stimulation together with or without IVIG or desialylated IVIG, and the change of genes were analyzed. Primary human pDCs were preincubated with or without 10mg/ml IVIG or desialylated IVIG followed by stimulation with CpG overnight. The different genes between IVIG+CpG and desialylated IVIG+CpG were analyzed.

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Dectin-1-mediated signaling leads to characteristic gene expressions in rat mast cells

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Project description:Cells of the innate immune system retain memory of prior exposures through a process known as innate immune training. b-glucan, a Dectin-1 ligand purified from the Candida albicans cell wall, has been one of the most widely utilized and well-characterized ligands for inducing innate immune memory. However, many Dectin-1 agonists exist, and it is not known whether all Dectin-1 ligands produce the same phenotype. Using a well-established in vitro model of trained immunity, we compared two commercially available Dectin-1 agonists with the gold standard b-glucan represented in the literature. We found that depleted zymosan, a b-glucan purified from the Saccharomyces cerevisiae cell wall through alkali treatment, produced near identical training effects as C. albicans b-glucan. However, untreated zymosan produced a distinct training effect from b-glucans at both the transcript and cytokine level. Training with zymosan diminished, rather than potentiated, induction of key cytokines such as TNF, IL-12, and IL-6. Zymosan activated NFkB and AP-1 transcription factors more strongly than b-glucans. The addition of the toll-like receptor (TLR) ligand Pam3CSK4 was sufficient to convert the training effect of b-glucans to a phenotype resembling training with zymosan. We conclude that differential activation of TLR signaling pathways determines the phenotype of innate immune training induced by Dectin-1. These findings bring clarity to the specific question of which Dectin-1 agonists produce prototypical training effects and provides broader insight into how signaling networks regulate innate immune training at large.

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