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Krüppel-like factor 2 controls IgA plasma cell compartmentalization and IgA responses

ABSTRACT: Krüppel-like factor 2 controls IgA plasma cell compartmentalization and IgA responses

PROVIDER: PRJNA674318 | ENA |

REPOSITORIES: ENA

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Krüppel-like factor 2 controls IgA plasma cell compartmentalization and IgA responses

Project description:Krüppel-like factor 2 (KLF2) is a potent regulator of lymphocyte differentiation, activation and migration. However, its functional role in adaptive and humoral immunity remains elusive. Therefore, by using mice with a B cell-specific deletion of KLF2, we investigated plasma cell differentiation and antibody responses. We revealed that the deletion of KLF2 resulted in perturbed IgA plasma cell compartmentalization, characterized by the absence of IgA plasma cells in the bone marrow, their reductions in the spleen, the blood and the lamina propria of the colon and the small intestine, concomitant with their accumulation and retention in mesenteric lymph nodes and Peyer’s patches. Most intriguingly, secretory IgA in the intestinal lumen was almost absent, dimeric serum IgA was drastically reduced and antigen-specific IgA responses to soluble Salmonella flagellin were blunted in KLF2-deficient mice. Perturbance of IgA plasma cell localization was caused by deregulation of CCR9, Integrin chains αM, α4, β7, and sphingosine-1-phosphate receptors. Hence, KLF2 not only orchestrates the localization of IgA plasma cells by fine-tuning chemokine receptors and adhesion molecules but also controls IgA responses to Salmonella flagellin.

2022-07-13 | GSE160732 | GEO

Kruppel-like factor 2 controls IgA plasma cell compartmentalization and IgA responses.

Project description: Not available

| S-EPMC9259478 | biostudies-literature

Metabolic fitness of IgA+ plasma cells in the gut requires DOCK8

Project description:DOCK8 is required for T cell-dependent gut IgA by maintaining plasma cell metabolic fitness

2024-01-10 | GSE198847 | GEO

Transcriptome analysis of human colonic IgA+ plasma cell subsets and naïve B cells

Project description:Immunoglobulin A (IgA) is the most abundant antibody in the intestinal tract. Recent studies show that discrete subsets of gut human plasma cells (PCs) release IgA, which contributes to the maintenance of gut homeostasis. To better characterize the properties of these PC subsets, we performed global transcriptome analysis in naïve B cells as well as immature CD19+IgA+CD138- PCs, mature CD19+IgA+CD138+ PCs and late CD19-IgA+CD138+ PCs after their purification from human colon samples.

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Transcriptomic analyis of isotype specific bone marrow and siLP IgA and IgAKO plasma cells as well as follicular and MZ B cells

Project description:Plasma cell gene expression is driven both by isotype and tissue location. In this series we examine gene expression of bone marrow IgA, IgM and IgG plasma cells as well as IgA plasma cells from small intestine lamina propria. To validate tissue specific gene expression we also include gene expression from lamina propria IgA-/- plasma cells. All plasma cell samples are from Blimp1+/GFP reporter animals and splenic follicular and marginal zone B cell gene expression have been added as reference populations.

2021-11-30 | GSE189410 | GEO

Rhythmicity of Intestinal IgA Responses Confers Oscillatory Commensal Microbiota Mutualism [2]

Project description:IgA+ Plasma Cells were sort-purified from the small intestinal lamina prorpia of C57BL/6 mice at four Zeitgeber time points (ZT0, 6, 12 and 18). RNA extracted from these samples was subjected to bulk RNA seq to identify time of day differences in IgA+ PC gene expression.

2022-09-02 | GSE175635 | GEO

IgA deglycosylation to identify glycosylation sites

Project description:In order to provide information on the peptide sequence of the IgA glycopeptides, a proteomics analysis was run on LC-MS/MS data of N-glycosidase F-digested IgA samples, in which the N-glycans had been released. The samples included IgA (isolated) from: 1) the saliva samples from two healthy donors, 2) a pooled-plasma standard from a minimum of 20 human donors (VisuCon-F Frozen Normal Control Plasma; Affinity Biologicals, Ancaster, Canada), 3) 10 μg of a human plasma-derived IgA standard (Lee Biosolutions, Maryland Heights, MO), and 4) a human colostrum-derived SIgA standard (Athens Research and Technology, Athens, GA).

2018-11-09 | PXD011228 | Pride

Plasma Cell Fate is Orchestrated by Large-Scale Changes in Compartmentalization

Project description:Plasma Cell Fate is Orchestrated by Large-Scale Changes in Compartmentalization

| PRJNA580261 | ENA

Rhythmicity of Intestinal IgA Responses Confers Oscillatory Commensal Microbiota Mutualism [1]

Project description:IgA+ Plasma Cells were sort-purified from the small intestinal lamina prorpia of mice with a B cell lineage-intrinsic deletion of Arntl (Mb1 Cre+/- x Arntl fl/fl) or Cre negative littermate controls (also deisgnated WT and KO), at two Zeitgeber time points (ZT0 and ZT12). RNA extracted from these samples was subjected to bulk RNA seq to identify time of day differences and to compare role of Arntl expression in this context.

2022-09-02 | GSE175609 | GEO

Commensal microbes drive the generation of large numbers of bone marrow plasma cells

Project description:The mechanisms whereby enteric pathogens and microbes induce systemic antibody responses remain obscure. In contrast to accepted models, we show that commensal microbes have a dramatic impact on the bone marrow (BM) plasma cell pool. Unlike standard vendor mice, in mice reared in our colony the majority of long-lived BM plasma cells secreted IgA antibodies. Exposing vendor mice to a unique microflora or Helicobacter sp. led to the generation of IgA-secreting BM cells, while also inducing increases in serum IgA antibodies enriched for binding to several commensal bacterial taxa. Moreover, BM IgA-secreting plasma cells exhibited a common clonal ancestry with intestinal IgA+ plasma cells, and both populations possessed unique gene expression signatures compared to other long-lived BM plasma cells. We conclude that commensal microbes overtly influence the BM plasma cell pool, and suggest that select commensal microbes can facilitate the induction of systemic humoral immunity.

2018-07-01 | GSE87091 | GEO

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