Characterization of an immunologically conserved epitope from hepatitis C virus E2 glycoprotein recognized by HLA-A2 restricted cytotoxic T lymphocytes

BACKGROUND/AIMS: Identification of epitopes recognized by cytotoxic T lymphocytes (CTL) in hepatitis C virus (HCV) proteins is of importance because they can be used for vaccination, treatment of infection or monitoring of immune responses. Our purpose was to characterize new CTL epitopes in HCV str...

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Detalles Bibliográficos
Autores: Sarobe, P. (Pablo)|||/items/e6f6a7ac-cfe2-409e-ab14-057dea5fd160, Huarte, E. (Eduardo)|||/items/c539fbb4-0e58-4af3-8379-6d8422060082, Lasarte-Sagastibelza, J.J. (Juan José)|||/items/e366ad83-3db4-41ec-a9da-ed9159ba5c0c, Lopez-Diaz-de-Cerio, A. (Ascensión)|||/items/29ab6acb-fcbb-43ff-b4c1-e2dc95e22bcb, Garcia, N. (Nicolás)|||/items/f28987d6-9dc4-4d34-9f80-436b9bddb930, Borras-Cuesta, F. (Francisco)|||/items/9f3719bd-4cf6-4e5b-b672-39179b54e8cc, Prieto, J. (Jesús)|||/items/0d9c3dec-4a09-400d-8c83-23ece1096c71
Tipo de recurso: artículo
Fecha de publicación:2001
País:España
Institución:Universidad de Navarra
Repositorio:Dadun. Depósito Académico Digital de la Universidad de Navarra
Idioma:inglés
OAI Identifier:oai:dadun.unav.edu:10171/21674
Acceso en línea:https://hdl.handle.net/10171/21674
Access Level:acceso abierto
Palabra clave:Hepatitis C virus
Cytotoxic T lymphocytes
Epitope
HLA binding
Descripción
Sumario:BACKGROUND/AIMS: Identification of epitopes recognized by cytotoxic T lymphocytes (CTL) in hepatitis C virus (HCV) proteins is of importance because they can be used for vaccination, treatment of infection or monitoring of immune responses. Our purpose was to characterize new CTL epitopes in HCV structural proteins. METHODS: Peptides were synthesized and tested in HLA-A2 binding assays. Binder peptides were used to stimulate peripheral blood mononuclear cells from HCV+ patients and controls, and activity measured in chromium release and ELISPOT assays. RESULTS: Twenty binder peptides were found, and stimulation of HCV+ patient cells with nine peptides showing high binding ability led to the growth of CD8+ CTL recognizing peptide E2(614-622) in association with HLA-A2. Peptide E2(614-622) was recognized by 30% of HLA-A2+ patients with chronic HCV infection, but no responses were observed in control groups. Five peptides derived from region E2(614-622) from 26 different viral isolates bound to HLA-A2 molecules, and all of them but one, containing Phe at position 622, were recognized by E2(614-622) specific CTL. CONCLUSIONS: These results show that peptide E2(614-622) belongs to a highly conserved region of HCV E2, and might be a good candidate to induce anti-HCV CTL responses in HLA-A2+ subjects.

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