DIABICLIPS

Unravelling the unconventional processing and presentation of preproinsulin to the immune system in human Type 1 Diabetes: the role of intramembrane-cleaving proteases

Coordinatore	KING'S COLLEGE LONDON    more  Organization address address: Strand city: LONDON postcode: WC2R 2LS contact info Titolo: Mr. Nome: Paul Cognome: Labbett Email: send email Telefono: 442078000000
Nazionalità Coordinatore	United Kingdom [UK]
Totale costo	231˙283 €
EC contributo	231˙283 €
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-2012-IEF
Funding Scheme	MC-IEF
Anno di inizio	2013
Periodo (anno-mese-giorno)	2013-06-01   -   2015-05-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	KING'S COLLEGE LONDON  Organization address address: Strand city: LONDON postcode: WC2R 2LS contact info Titolo: Mr. Nome: Paul Cognome: Labbett Email: send email Telefono: 442078000000	UK (LONDON)	coordinator	231˙283.20

Mappa

 Word cloud

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

 Obiettivo del progetto (Objective)

'Type 1 Diabetes (T1D) is a chronic autoimmune disease in which pancreatic beta cells are selectively destroyed by autoreactive CD8 cytotoxic T lymphocytes (CTLs). The identification of the epitopes presented by “diabetogenic” HLA molecules to these CTLs constitutes a major research target to understand how beta cells are killed. Preproinsulin (PPI) has emerged as a key autoantigen in T1D: a surprising finding made in the host laboratory is that the dominant HLA-A2.1-restricted-PPI epitope, PPI 15-24, localizes to the signal peptide (SP), being an unusual finding for self-, or indeed microbial antigens. The processing of PPI to derive such epitope is also highly unconventional in being proteasome and transporter associated with processing(TAP) independent. Preliminary studies in the host lab have identified more antigenic PPI-SP epitopes restricted to other “diabetogenic” HLA molecules and the existence of a common cleavage motif among them within the intramembrane SP portion. This suggests the involvement of an intramembrane cleaving protease (I-CLiP) in generating these disease-related epitopes. The hypothesis is that the generation of disease-associated PPI-SP epitopes involves novel I-CLiP-dependent processing and presentation pathway(s). This will be studied via: (i) generation of CD8 T-cell clones specific for each PPI-SP-epitope/HLA; (ii) determination of TAP and proteasome roles in the generation of PPI-SP epitopes(other than PPI 15-24) by specific inhibitor strategies; and (iii) determination of the role of ER proteases and I-CLiPs in the generation of PPI 15-24 and other TAP/proteasome-independent PPI-SP epitopes-potentially identified in (ii) using RNAi strategies. Thus, this proposal aims to unravel the molecular mechanisms leading to the generation of these important epitopes, potentially offering novel immunobiological insights and opening new fields of therapeutic interventions, while at the same time strengthening the ERA excellence in T1D research'