In vitro generation of long-lived human Plasma Cells II
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE222862 | GEO | 2023/12/31
REPOSITORIES: GEO
Similar Datasets
Project description:Gene expression profiling of B-cells from a model differentiation series: from Naïve B-cells, through a proliferative plasmablast stage to long-lived antibody secreting plasma cells.
2012-10-18 | GSE41208 | GEO
Project description:Gene expression profiling of B-cells from a model differentiation series: from Naïve B-cells, through a proliferative plasmablast stage to long-lived antibody secreting plasma cells. B-cells were isolated from the peripheral blood of three adult donors and differentiated in vitro (see individual samples for culture conditions)
2012-10-18 | E-GEOD-41208 | biostudies-arrayexpress
Project description:In vitro generation of long-lived human Plasma Cells II
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Project description:Maturation of Long Lived Plasma cells
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Project description:Antibody secreting cells (ASCs) survive in niche microenvironments, but cellular responses driven by particular niche signals are incompletely defined. The TNF superfamily (TNFSF) member A proliferation-inducing ligand (APRIL) can support the maturation of transitory plasmablasts into long-lived plasma cells. Here we explore the biological programs established by APRIL in human plasmablast. Under conditions allowing the maturation of ex vivo or in vitro generated plasmablasts, we find that APRIL drives activation of ERK, p38 and JNK, accompanied by a classical NFκB response and activation of the AKT/FOXO1 pathway. Time course gene expression data resolve co-ordinated transcriptional responses propagated via immediate early genes and NFκB targets and converging onto modules of genes enriched for MYC-targets and metabolism and cell growth related pathways. This response is shared between APRIL and an alternate TNFSF member CD40L but is not a feature of alternative niche signals delivered by IFNα or SDF1. However, APRIL and CD40L responses also diverge. CD40L drives expression of genes related to the activated B-cell state while APRIL does not. Thus, APRIL establishes a broad foundation for plasma cell longevity with features of cellular refuelling, while being uncoupled from support of the B-cell state.
2022-07-05 | GSE205100 | GEO
Project description:Splenic long-lived plasma cells (PCs) are abnormally numerous and deleterious in systemic autoimmune diseases, yet how they accumulate remains poorly understood. We demonstrate here that a pathological role of spleen-derived CD11b+Gr-1+ myeloid cells (SPMCs) underpins the accumulation of splenic long-lived PCs in a lupus-prone model. SPMCs were a mixture of granulocytic and monocytic myeloid-derived suppressor cells (MDSCs) that were expanded and acquired proinflammatory phenotypes in situ during lupus progression. By promoting the development of IFN--secreting and follicular helper T cells, SPMCs licensed CD4+ T cells to be pathologic activators of SPMCs and PCs. SPMCs also directly promoted the survival of PCs by providing B-cell activating factor of the TNF family. The frequency of SPMCs correlated with that of splenic long-lived PCs. Depletion of CD11b+Gr-1+ cells reduced autoantibody production. Thus, our findings suggest that SPMCs expanded in situ establish a positive feedback loop with CD4+ T cells, leading to accumulation of long-lived PCs which exacerbate lupus autoimmunity.
2021-02-09 | GSE161850 | GEO
Project description:To analyze global gene transcriptional changes and BCR clonal differences associated with long lived plasma cell specification, we sorted LLPCs and bulk PCs using Blimp1-ERT2-cre rosa26-LSLYFP expressing mice and analyzed them using bulk RNAsequencing
2024-02-22 | GSE221251 | GEO
Project description:The differentiation of B cells into antibody-secreting cells depends on cell division-coupled, epigenetic and other cellular processes that are incompletely understood. We have developed a CRISPR/Cas9-based screen that models an early stage of T cell-dependent plasma cell differentiation and measures B cell survival or proliferation versus the formation of CD138+ plasmablasts. Here, we refined and extended this screen to more than 500 candidate genes that are highly expressed in plasma cells. Among known genes whose deletion preferentially affected plasmablast formation were the transcriptional regulators Prdm1, Irf4 and Pou2af1, and the Ern1 gene encoding the ER stress sensor IRE1a. Moreover, we newly identified several genes involved in NF-kB or p38 signaling (Pim2, Nfkbia, Mapk14), vesicle trafficking (Arf4, Preb) and epigenetic regulators that form part of the NuRD complexes (Hdac1, Mta2, Mbd2). Defective plasmablast formation caused by Ern1 deletion could not be rescued by spliced XBP1 (XBP1s), a transcription factor dependent on and downstream of IRE1a, suggesting that in early plasma cell differentiation IRE1a acts independently of XBP1s. The deletion of ARF4, a small GTPase required for ER-to-Golgi transport, impaired plasmablast formation by blocking antibody secretion. Plasmablast formation after Hdac1 deletion was consistently reduced by about 50%, while deletion of the closely related Hdac2 gene had no effect. Hdac1 knock-out led to strongly perturbed protein expression of antagonistic transcription factors that specify plasma cell versus B cell identity (by decreasing IRF4 and BLIMP1 and increasing BACH2 and PAX5). Taken together, our results highlight specific and non-redundant roles for Ern1, Arf4 and Hdac1 in the early steps of plasma cell differentiation.
2022-12-22 | PXD038201 | Pride
Project description:Upon encounter with antigen, B cells undergo a sequential process of differentiation to become antibody-secreting plasma cells. While the key drivers of differentiation have been identified, research has been limited by the lack of in vitro models recapitulating the full process for murine B cells. Here we describe methodology using BCR or TLR ligation to obtain plasma cells that are phenotypically mature, have exited cell cycle and express a gene signature concordant with long-lived plasma cells. Dependent on the initial stimuli, the transcriptomes also show variation, suggestive of unique functional properties for the resultant plasma cells. Moreover, using the new culture conditions we demonstrate that alternative promoter choice regulating the expression of the master transcription factor Blimp-1 can be observed. Thus, our novel system provides a readily tractable model for furthering our understanding of plasma cell biology.
2021-11-03 | GSE160823 | GEO
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