T cells specific for a single viral epitope, but using different T cell receptors, should have flexibility in their epitope recognition to protect the infected host against the emergence of viral escape mutants. Therefore, polyclonality of the hepatitis B virus (HBV)-specific cytotoxic T lymphocyte response has been hypothesized to be a major determinant in the control of infection. We analyzed the V beta chain composition of the core 18-27-specific GD8 cells in acute and persistently HBV-infected patients using HLA-A2 tetrameric complexes and a panel of V beta antibodies. Different T cell receptors were utilized by core 18-27-specific CD8 cells both in patients with acute and chronic infection. The functional ability of these epitope-specific T cells to respond to potential viral mutations was then tested. The polyclonal HBV-specific CD8 response present in patients with acute hepatitis displayed a limited efficiency to recognize mutations introduced within the epitope. The ability of core 18-27-specific CD8 to tolerate epitope mutations was found only during persistent HBV infection. The data suggest that although a clonally heterogeneous CD8 response can be largely inhibited by the occurrence of single epitope mutations in primary HBV infection, preferential selection of T cells able to counteract the emergence of viral mutations can occur during persistent infection.

T cell receptor usage of virus-specific CD8 cells and recognition of viral mutations during acute and persistent hepatitis B virus infection / Maini, Mk; Reignat, S; Boni, C; Ogg, Gs; King, As; Malacarne, F; Webster, Gjm; Bertoletti, A. - In: EUROPEAN JOURNAL OF IMMUNOLOGY. - ISSN 0014-2980. - 30:11(2000), pp. 3067-3078. [10.1002/1521-4141(200011)30:11<3067::AID-IMMU3067>3.0.CO;2-L]

T cell receptor usage of virus-specific CD8 cells and recognition of viral mutations during acute and persistent hepatitis B virus infection

Boni C;
2000-01-01

Abstract

T cells specific for a single viral epitope, but using different T cell receptors, should have flexibility in their epitope recognition to protect the infected host against the emergence of viral escape mutants. Therefore, polyclonality of the hepatitis B virus (HBV)-specific cytotoxic T lymphocyte response has been hypothesized to be a major determinant in the control of infection. We analyzed the V beta chain composition of the core 18-27-specific GD8 cells in acute and persistently HBV-infected patients using HLA-A2 tetrameric complexes and a panel of V beta antibodies. Different T cell receptors were utilized by core 18-27-specific CD8 cells both in patients with acute and chronic infection. The functional ability of these epitope-specific T cells to respond to potential viral mutations was then tested. The polyclonal HBV-specific CD8 response present in patients with acute hepatitis displayed a limited efficiency to recognize mutations introduced within the epitope. The ability of core 18-27-specific CD8 to tolerate epitope mutations was found only during persistent HBV infection. The data suggest that although a clonally heterogeneous CD8 response can be largely inhibited by the occurrence of single epitope mutations in primary HBV infection, preferential selection of T cells able to counteract the emergence of viral mutations can occur during persistent infection.
2000
T cell receptor usage of virus-specific CD8 cells and recognition of viral mutations during acute and persistent hepatitis B virus infection / Maini, Mk; Reignat, S; Boni, C; Ogg, Gs; King, As; Malacarne, F; Webster, Gjm; Bertoletti, A. - In: EUROPEAN JOURNAL OF IMMUNOLOGY. - ISSN 0014-2980. - 30:11(2000), pp. 3067-3078. [10.1002/1521-4141(200011)30:11<3067::AID-IMMU3067>3.0.CO;2-L]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2960837
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