Skip to main content
Vai all'homepage della Commissione europea (si apre in una nuova finestra)
italiano it
CORDIS - Risultati della ricerca dell’UE
CORDIS
Contenuto archiviato il 2024-06-10

Studies on antigen presentation and immune recognition in hsp transfected tumor cells

Obiettivo



Research objectives and content The proposed project involves studies to increase the immunogenicity of tumor cells by transfection with a foreign heat shock protein gene. Heat shock proteins (HSPs) are abundant proteins of different molecular weight classes which are present in the cytosol as well as in all cellular organelles. During various physiological processes such as protein synthesis, degradation and transport through membranes, they bind to interactive sites of polypeptides thereby preventing their improper interaction with other molecules and enabling controlled further processing of the polypeptide in question. Previous studies with the macrophage murine tumor cell line J774 have shown that ex vivo insertion of a gene coding the Mycobacterium leprae HSP65 kDa into the tumor cells results in their inability to form tumors in mice and generation of effective antitumor immunity, indicating that the presence of the mycobacterial HSP65 kDa enhanced immunological recognition of unique structures expressed by the tumor cell. The mechanisms by which highly conserved proteins like HSPs are involved in eliciting immune responses are not clear. However, it is suggested that HSPs may act as carrier molecules to present immunogenic peptides. To investigate this mechanism we have initially generated primary cytotoxic T lymphocytes (CTL) utilizing a murine allogeneic system in vitro, and tested these cells for cytotoxic activity against mycobacterial HSP65 kDa transfectants of the murine mastocytoma cell line P815. The work to date has involved transfection of P815 cells with the mycobacterial hsp65 gene in order to establish the target cell line, generation of cytotoxic T lymphocytes capable of recognizing P815 cells and optimising the cytotoxicity assay in which P815 cells are Iysed by cytotoxic T cells. The data from this preliminary study indicate that mycobacterial HSP65 expression on P815 transfectants results in a substantial increase of susceptibility to allospecific CI L lysis. Based on these results we are now conducting more extensive studies in order to evaluate the role of HSP65 kDa in the molecular mechanisms involved in the immunological recognition of the P815 tumor cell line. It is now proposed to determine whether HSP65 kDa could be increasing or altering processing and/or presentation of self-molecules such that they were more likely to be recognized by the irnmune system. Furthermore, it is also planned to investigate whether a cytotoxic immune response against exogenous antigens could be generated using gene therapy with the hsp65 kDa gene.
Training content (objective, benefit and expected impact)
The use of HSP for cancer immunotherapy is based on the physiological function of these proteins. They are chaperones which may play a role in the processing and/or presentation of antigens by binding to processed antigenic peptides and facilitating their interactions with the immune system. In this context, one could envision that tumour cells could be genetically modified to function as antigen presenting cells for tumor antigens. It is quite clear that additional studies are required to define precisely how genetically modified tumor cells stimulate immunity. They will hopefully be incorporated into the design of future tumor cell vaccines, and thereby further improve the therapeutic efficacy of genetically modified tumor cells for the treatment of malignancies. Links with industry / industrial relevance (22)
None at present, although a number of potential links are currently under negotiation.

Campo scientifico (EuroSciVoc)

CORDIS classifica i progetti con EuroSciVoc, una tassonomia multilingue dei campi scientifici, attraverso un processo semi-automatico basato su tecniche NLP. Cfr.: Il Vocabolario Scientifico Europeo.

È necessario effettuare l’accesso o registrarsi per utilizzare questa funzione

Programma(i)

Programmi di finanziamento pluriennali che definiscono le priorità dell’UE in materia di ricerca e innovazione.

Argomento(i)

Gli inviti a presentare proposte sono suddivisi per argomenti. Un argomento definisce un’area o un tema specifico per il quale i candidati possono presentare proposte. La descrizione di un argomento comprende il suo ambito specifico e l’impatto previsto del progetto finanziato.

Invito a presentare proposte

Procedura per invitare i candidati a presentare proposte di progetti, con l’obiettivo di ricevere finanziamenti dall’UE.

Dati non disponibili

Meccanismo di finanziamento

Meccanismo di finanziamento (o «Tipo di azione») all’interno di un programma con caratteristiche comuni. Specifica: l’ambito di ciò che viene finanziato; il tasso di rimborso; i criteri di valutazione specifici per qualificarsi per il finanziamento; l’uso di forme semplificate di costi come gli importi forfettari.

RGI - Research grants (individual fellowships)

Coordinatore

MRC National Institute for Medical Research
Contributo UE
Nessun dato
Indirizzo
The Ridgeway Mill Hill
NW7 1AA London
Regno Unito

Mostra sulla mappa

Costo totale

I costi totali sostenuti dall’organizzazione per partecipare al progetto, compresi i costi diretti e indiretti. Questo importo è un sottoinsieme del bilancio complessivo del progetto.

Nessun dato
Il mio fascicolo 0 0