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Contenido archivado el 2024-06-10

Autoantigen presentation by epithelial cells - study of class ii associated peptides

Objetivo



We have used an insulinoma cell line, RIN-B, which expresses most of the putative IDDM autoantigens (GAD 65 and 67, insulin, CPH, 38 kDa insulin granule protein). ICA positive sera from IDDM patients are positive with RIN-B cells and it has been shown that T cells from IDDM patients have specific reactivity to RIN-B extracts which can specifically induce the proliferation of a T cell clone specific for the 38kDa of islet granules. The objective of this project is the study of the capacity of an endocrine epithelial cell to process and present target autoantigens to T cells. We are using the RIN cell line as the basis to construct a panel of transfectants expressing different combinations of HLA molecules DR4 or DR3, human B7 as a co-stimulatory molecule and the invariant chain (Ii) and HLA-DM so the class II molecules expressed are internally transported and loaded with peptide in a way similar to a normal APC. This panel of transfectants is being used to study: 1) the processing capacity of the cells as asessed by the analysis of peptides bound to HLA-DR4 or DR3 in the different transfectants and 2) their capacity to present antigen by inducing a primary allogeneic response from PBL or to activate the response of alloreactive, antigen specific and autoreactive T cell clones.

Ámbito científico (EuroSciVoc)

Programa(s)

Tema(s)

Convocatoria de propuestas

Datos no disponibles

Régimen de financiación

RGI - Research grants (individual fellowships)

Coordinador

Universidad Autonoma de Barcelona
Aportación de la UE
Sin datos
Dirección
S/N,Carretera del Canyet
08916 Badalona
España
Coste total
Sin datos

Participantes (1)