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BCRdangerCOMPETITION

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The role of danger signal and cellular competition in the elimination of B cells...

The role of danger signal and cellular competition in the elimination of B cells lacking the B cell receptor. B cells represent a specialized population of lymphocytes responsible for adaptive immune responses and life-long immune memory. All mature B cells carry B cell receptors (BCRs) on the surface and it is through the BCR that B cell... ver más

01/10/2019

MDC

171K€

Presupuesto del proyecto: 171K€

Líder del proyecto

MAX DELBRUECK CENTRUM FUER MOLEKULARE MEDIZIN... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2019-10-01

MSCA-IF-2016: Individual Fellowships

I+D

Cerrada hace 8 años

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No hay información privada compartida para este proyecto. Habla con el coordinador.

1 Participantes

MDC

171.46K€ | Lider

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Duración del proyecto: 30 meses Fecha Inicio: 2017-03-24
Fecha Fin: 2019-10-01

Líder del proyecto

MAX DELBRUECK CENTRUM FUER MOLEKULARE MEDIZIN... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 171K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto B cells represent a specialized population of lymphocytes responsible for adaptive immune responses and life-long immune memory. All mature B cells carry B cell receptors (BCRs) on the surface and it is through the BCR that B cells recognize foreign antigens and subsequently provide antibody responses. Acute ablation of the BCR in resting mature naïve B cells in mice leads to a fast disappearance of Immunoglobulin negative (Ig-) B cells from peripheral lymphoid system. This phenomenon has been mainly explained by a tonic signal provided by the BCR, essential for B cell survival. However, there are at least two other possible, not mutually exclusive, mechanisms. In this proposal I hypothesize that i) loss of the BCR structure provides a danger signal leading to apoptosis of Ig- B cells; ii) Ig- B cells are eliminated as a result of cellular competition with the Ig+ B cells. I will test these 2 hypothesis by i) addressing the unfolded protein response (UPR) in Ig- B cells as a possible danger signal followed by in vivo genetic rescue experiments testing for its causality in Ig- B cell depletion; ii) I will produce pure Ig- B cell cultures, exploiting the novel system of genome editing of primary B cells, and address - in vitro and in vivo - the fitness, proliferation and differentiation capacity of Ig- B cells in presence and absence of cellular competition with Ig+ B cells. By addressing these points my work might provide a first-time evidence for the existence of a danger signal initiated in a B cell upon BCR ablation and prove its causality in Ig- B cell disappearance. On the other hand, elimination of Ig- B cells as a result of cellular competition with Ig+ B cells is a novel concept with important implications for lymphoma biology and potential clinical applications.

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