2PM T CELL IMAGING

Molecular imaging analysis of the function of the cytoskeletal regulator DOCK2 during physiological T cell activation

Coordinatore	UNIVERSITAET BERN    more  Organization address address: Hochschulstrasse 4 city: BERN postcode: 3012 contact info Titolo: Ms. Nome: Marianne Cognome: Schori Email: send email Telefono: +41 31 631 4141 Fax: +41 31 631 3799
Nazionalità Coordinatore	Switzerland [CH]
Totale costo	45˙000 €
EC contributo	45˙000 €
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-RG
Funding Scheme	MC-ERG
Anno di inizio	2011
Periodo (anno-mese-giorno)	2011-03-01   -   2014-02-28

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITAET BERN  Organization address address: Hochschulstrasse 4 city: BERN postcode: 3012 contact info Titolo: Ms. Nome: Marianne Cognome: Schori Email: send email Telefono: +41 31 631 4141 Fax: +41 31 631 3799	CH (BERN)	coordinator	45˙000.00

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 Obiettivo del progetto (Objective)

'Recent experiments using twophoton microscopy (2PM) of lymphocytes interacting with dendritic cells (DCs) loaded with cognate peptide – major histocompability complexes (pMHC) have uncovered their dynamic interactions inside lymphoid tissue of small rodents. Depending on the amount of pMHC on the DC surface, motile T cells may either slowly integrate T cell receptor-mediated signals or immediately undergo long-term interactions with DCs. Thus, motility and T cell activation inside lymphoid tissue are closely intertwined. A key motility-inducing factor is the Rac guanine exchange factor DOCK2. Using 2PM of lymphoid tissue, we previously demonstrated that lymphocytes lacking DOCK2 showed reduced motility. However, it is unclear which intracellular binding partners regulate DOCK2 function in lymphoid cells. Furthermore, the role of DOCK2 expression during interactions between T cells and DCs displaying varying densities of cognate pMHC complexes in vivo has not been explored to date. Here, we propose to carry out an analysis of potential binding partners of DOCK2 recently identified in a yeast-two-hybrid screen. Furthermore, we will perform a 2PM analysis comparing the interaction dynamics of control and DOCK2-deficient T cells with DCs loaded with increasing amounts of cognate pMHC complexes. Our project thus aims to clarify the physiological function of DOCK2 for T cell biology.'