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The lipid Gb3 promotes germinal center B cell responses and anti-viral immunity

ABSTRACT: The lipid Gb3 promotes germinal center B cell responses and anti-viral immunity

PROVIDER: PRJNA1040498 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26833504.fastq.gz	Fastqsanger.gz
	SRR26833504_1.fastq.gz	Fastqsanger.gz
	SRR26833504_2.fastq.gz	Fastqsanger.gz
	SRR26833505.fastq.gz	Fastqsanger.gz
	SRR26833505_1.fastq.gz	Fastqsanger.gz

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The lipid Gb3 promotes germinal center B cell responses and anti-viral immunity

Project description:Influenza viruses escape immunity due to rapid antigenic evolution, which requires vaccination strategies that allow for broadly protective antibody responses. Here, we demonstrate that the lipid globotriaosylceramide (Gb3) expressed on germinal center (GC) B cells is essential for the production of high-affinity antibodies. Mechanistically, Gb3 binds and disengages CD19 from its chaperone CD81 for subsequent translocation to the B cell receptor (BCR) complex to trigger signaling. Moreover, this lipid regulates MHC-II expression to increase diversity of T follicular helper (Tfh) and GC B cells reactive with subdominant epitopes. In influenza infection, Gb3 promotes broadly reactive antibody responses and cross-protection. Thus, we show that Gb3 determines affinity as well as breadth in B cell immunity and propose this lipid as potential vaccine adjuvant against viral infection.

2023-12-05 | GSE247797 | GEO

Proteome profiling of mouse germinal center B cells

Project description:Productive B cell responses are critical to protect a host from infection. The spleen and lymph nodes are populated by resting follicular B cells, which can enter germinal centers upon antigen encounter. Once in the germinal center, B cells migrate between the dark and light zones, where they undergo somatic hypermutation and selection, respectively. While germinal center B cells have been studied, an intense molecular understanding of these cells/subsets (and the differences between them) is lacking.

2020-04-06 | PXD015524 | Pride

ChIPseq analyses in germinal center B cells

Project description:Germinal center B cells were isolated from human tonsil tissue and crosslinked. ChIP was performed on two distinct pools of germinal center cells, each obtained from 3-5 donors. The experiment includes two biological replicates (germinal center cell pools from different donors). ChIP was performed on both pools and subject to library preparation and sequencing. Input DNA was sequenced for both pools.

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B cell-intrinsic STAT6 controls the germinal center response in type 2 immunity

Project description:By investigating the germinal center (GC) formation in STAT6ko/WT bone marrow-mixed chimera we found that GC formation in type 2 immune responses is dependent on B cell intrinsic expression of IL-4/IL-13-induced genes. We therefore used microarrays to find Stat6 dependent genes that are important for germinal center formation and/or organization after infection with the nematode Nippostrongylus brasiliensis (N. brasiliensis). Bone marrow of STAT6ko (CD45.2+) and WT (CD45.1+) were mixed and injected in lethaly irradiated WT (CD45.1+) mice. After 8 weeks, 5 Bone marrow-mixed chimera were infected with N. brasiliensis and draining lymph nodes were collected at day 14 after the infection and pooled. RNA was isolated from sort-purified CD45.1+ or CD45.2+ GC B cells (B220+CD38loGL-7hi).

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B cell-intrinsic STAT6 controls the germinal center response in type 2 immunity

2014-05-26 | GSE47679 | GEO

ChIPseq analyses in germinal center B cells

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The influence of TFEB on gene expression in primary murine germinal center and non-germinal center B cells

Project description:To investigate TFEB-dependent mRNA expression in murine B cells, FACS-sorted germinal center and non-germinal center B lymphocytes of B-cell-specific conditional TFEB KO mice and control littermates were subjected to RNA sequencing analysis

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Gene Expression Profiles of Germinal Center B Cells

Project description:We report the gene expression profiles of germinal center B cells obtained by FACS analyses of normal human lymph nodes. We used FACS analyses to isolate germinal center B cells from 3 different individuals with one individual sampled twice. The overall goal was simply to identify genes that are highly expressed or silent in these purified cell populations.

2009-07-31 | E-GEOD-16712 | biostudies-arrayexpress

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