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The T cell repertoire primed by antiviral vaccination is influenced by self-tolerance.

Abstract：

:Vaccination can elicit CD8(+) cytotoxic T lymphocytes (CTL) that recognize peptides presented by class I MHC molecules. Relatively little is known, however, about the genetic factors that shape the repertoire of T cell clonotypes responding to any given epitope. We report here that H-2(b) mice immunized with a plasmid DNA vaccine or vaccinia virus encoding for HIV-1SF2p55gag elicit CD8(+) CTL against the H-2Db-restricted immunodominant epitope (pgagb). This response involved three different T cell populations based on their recognition of alloantigens: one that cross-reacted with the alloantigen H-2Ld, one that cross-reacted with H-2Kd, and one that did not cross-react with either H-2(d) or H-2(k) molecules. Using the TAP-deficient cell line T2-Ld, we showed that pgagb-specific CTL cross-react with H-2Ld and a yet unidentified self-peptide. In mice expressing H-2(b) and H-2(d) allotypes, we investigated whether tolerance to H-2(d) influenced the HIVp55gag-specific CTL repertoire as a consequence of thymic deletion of the cross-reactive CTL repertoire. In (H-2(dxb))F1 mice heterogygosity at the MHC-I level prevented maturation of some but not all TCR combinations specific for H-2Db+pgagb, illustrating the concept that self-tolerance can influence the repertoire of antiviral T cells.

journal_name

Cell Immunol

journal_title

Cellular immunology

authors

Paliard X,Doe B,Walker CM

doi

10.1006/cimm.1998.1338

subject

Has Abstract

pub_date

1998-08-25 00:00:00

pages

73-9

issue

1

eissn

0008-8749

issn

1090-2163

pii

S0008-8749(98)91338-7

journal_volume

188

pub_type

杂志文章

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