ORCHESTRATE

Role of plasmacytoid dendritic cells in the orchestration of in vivo immune responses

 Coordinatore INSTITUT PASTEUR 

 Organization address address: RUE DU DOCTEUR ROUX 25-28
city: PARIS CEDEX 15
postcode: 75724

contact info
Titolo: Dr.
Nome: Matthew Lawrence
Cognome: Albert
Email: send email
Telefono: +33 1 45688552
Fax: +33 1 45688548

 Nazionalità Coordinatore France [FR]
 Totale costo 185˙748 €
 EC contributo 185˙748 €
 Programma FP7-PEOPLE
Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
 Code Call FP7-PEOPLE-2010-IEF
 Funding Scheme MC-IEF
 Anno di inizio 2012
 Periodo (anno-mese-giorno) 2012-12-01   -   2014-11-30

 Partecipanti

# participant  country  role  EC contrib. [€] 
1    INSTITUT PASTEUR

 Organization address address: RUE DU DOCTEUR ROUX 25-28
city: PARIS CEDEX 15
postcode: 75724

contact info
Titolo: Dr.
Nome: Matthew Lawrence
Cognome: Albert
Email: send email
Telefono: +33 1 45688552
Fax: +33 1 45688548

FR (PARIS CEDEX 15) coordinator 185˙748.00

Mappa


 Word cloud

Esplora la "nuvola delle parole (Word Cloud) per avere un'idea di massima del progetto.

activation    function    phenotype    inflammatory    adaptive    innate    siglec    vivo    modulate    responses    cells    conventional    nk    initiation    pdcs    pdc    mice    cdcs    dendritic    expression    knock    immune    tlr    albert    ifns    cell   

 Obiettivo del progetto (Objective)

'Plasmacytoid dendritic cells (pDCs) which are professional type I IFN producing cells modulate phenotype and function of conventional dendritic cells (cDCs) triggering maturation and enhancing priming of cytotoxic T lymphocytes (CTLs). It is widely accepted that type I IFNs offer a link between innate and adaptive immune responses, but there are contrasting data regarding their immunoregulatory effects. It has been shown that pDC derived IFNs modulate the phenotype and function of conventional DCs. Moreover, pDCs and cDCs contribute to the activation of NK cells. Ability of pDC to function as APC for T cells is also demonstrated. Thus pDC appear specialized for initiation of innate response, but also have certain capabilities of inducing and modulating adaptive immune responses.

Recent work from Albert group provided a first-generation multi-analyte profile (MAP) of how pDCs serve to bridge innate and adaptive immune responses in the context of TLR7 and TLR9 agonists analysing in vitro human isolated pDCs. Four distinct cytokine/chemokine loops by wich pDCs contribute to the initiation of an inflammatory response were identified, what helped to provide a foundation for understanding the functional status of pDCs in different disease states.

To understand the impact of inflammatory response on the coordination of immune responses, to define the mechanism by which innate effector molecules influence adaptive immunity at a fundamental level, in vivo research on mouse models is required. Thusfar mice strain that permit control of gene expression in pDCs has not been used. The Albert lab developed Siglec-H-CreERT2 knock-in mice with pDC specific inducible Cre expression. A second knock-in was developed in order to control the production of type I IFNs – Siglec-H-IRF-7. By using new mice mutants it will be possible to determine the role of pDCs and pDC-derived type I IFNs in the orchestration of cDC activation of CD8 T cell and NK cell responses in vivo.'

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