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PlasmaCellControl SIGNED

Transcriptional control of plasma cell development and function

Total Cost €

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EC-Contrib. €

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Partnership

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Project "PlasmaCellControl" data sheet

The following table provides information about the project.

Coordinator
FORSCHUNGSINSTITUT FUR MOLEKULARE PATHOLOGIE GESELLSCHAFT MBH 

Organization address
address: CAMPUS-VIENNA-BIOCENTER 1
city: WIEN
postcode: 1030
website: www.imp.ac.at

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Austria [AT]
 Total cost 2˙500˙000 €
 EC max contribution 2˙500˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-ADG
 Funding Scheme ERC-ADG
 Starting year 2018
 Duration (year-month-day) from 2018-01-01   to  2022-12-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    FORSCHUNGSINSTITUT FUR MOLEKULARE PATHOLOGIE GESELLSCHAFT MBH AT (WIEN) coordinator 2˙500˙000.00

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 Project objective

Antibody-secreting cells consisting of short-lived proliferating plasmablasts and long-lived quiescent plasma cells are essential for the acute response to infection and long-term protection of the host against pathogens. Only a few regulators (Blimp1, IRF4, XBP1, Aiolos, Ikaros and E-proteins) have been implicated in the transcriptional control of antibody-secreting cells, and their target genes, with the exception of Blimp1 and E-proteins, are still unknown. This proposal aims to systematically identify key players in the development and function of antibody-secreting cells by using the CRISPR/Cas9 and Cre/loxP methods. For this, we improved existing protocols to extend the duration of in vitro plasmablast differentiation and showed that Rosa26(Cas9/) B cells infected with Blimp1 or Xbp1 sgRNA-expressing retroviruses recapitulated the Blimp1 and Xbp1 mutant phenotypes in this proof-of-principle experiment. Moreover, Cre retrovirus-mediated deletion of Irf4, Ikaros and Aiolos strongly impaired plasmablast differentiation in this optimized system. To discover new regulators of plasma cell differentiation, CRISPR/Cas9-based screens will be performed with pooled sgRNA libraries targeting all known upregulated genes in plasmablasts and plasma cells, followed by individual validation of the best hits. Selected top-ranked genes will be analyzed in vivo by conditional mutagenesis with newly generated, plasma cell-specific Cre lines. Regulated target genes of IRF4, Ikaros, Aiolos, XBP1 and the XBP1-regulated transcription factor Bhlha15 will be identified in plasmablasts by ChIP- and RNA-seq analyses. Target genes with potentially interesting functions will be further characterized by CRISPR/Cas9- or Cre/loxP-mediated mutagenesis. These experiments will provide fundamentally new insight into the molecular mechanisms controlling the development and function of antibody-secreting cells, which are the essential effector cells of humoral immunity.

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