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Decoding at systems level the crosstalk between the T cell antigen receptor the...

Decoding at systems level the crosstalk between the T cell antigen receptor the CD28 costimulator and the PD 1 coinhibitor under physiological and pathological conditions. Although the T cell antigen receptor (TCR) occupies a central place in T cell physiology, it does not work in isolation and the signals it triggers are tuned by receptors that convey positive (costimulators) and negative (coinhibi... ver más

31/07/2023

CNRS

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

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Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2023-07-31

ERC-2017-ADG: ERC Advanced Grant Scope:Objectives

I+D

Cerrada hace 7 años

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Este proyecto no cuenta con búsquedas de partenariado abiertas en este momento.

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2 Participantes

CNRS

2.00M€ | Lider

IMA-TELSTAR, S.L.

282.24K€ | Participante

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Duración del proyecto: 60 meses Fecha Inicio: 2018-07-02
Fecha Fin: 2023-07-31

Líder del proyecto

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Although the T cell antigen receptor (TCR) occupies a central place in T cell physiology, it does not work in isolation and the signals it triggers are tuned by receptors that convey positive (costimulators) and negative (coinhibitors) informations. We lack a satisfying comprehension of the way T cells integrate such multiple inputs to make informed decisions. The proteomics-based methodology we developed around the TCR places us in a favorable situation to decode at systems-level the crosstalk between the TCR, the CD28 costimulator and the PD-1 coinhibitor signaling pathways. The novelty of our approach stems from (1) its use of primary T cells, (2) its capacity to probe the architecture and dynamics of signalosomes resulting from T cell-antigen presenting cell encounters, (3) the attention we pay to the stoichiometry of the studied signalosomes, a key parameter largely ignored in previous studies, and (4) its multidisciplinary nature straddling molecular and organismal scales. Our specific aims are: Aim 1. To understand how the TCR and CD28 signaling pathways cooperate to achieve optimal T cell responses. Aim 2. To determine whether CD28 is the sole target of the PD-1 coinhibitor. Aim 3. To determine how under inflammatory conditions CD28 functions can be superseded by those of OX40, a costimulator of the TNFR superfamily. Aim 4. To unveil how malfunctions of LAT, a key signaling hub used by the TCR, disrupt the TCR-CD28 crosstalk and result in unique pathogenic T cells that by becoming ‘autistic’ to TCR signals and addicted to CD28 signals lead to severe immunopathologies. We think that combining genetic, epigenomics, proteomics, and computational approaches creates ideal experimental conditions to understand at system-levels how TCR, costimulatory, coinhibitory and inflammatory signals are integrated during T cell clonal expansion. Although of fundamental nature, our project should help understanding the harmful role PD-1 plays during anti-tumoral responses.

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