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J. Virol., Dec 1995, 7416-7422, Vol 69, No. 12
K Daly, P Nguyen, DL Woodland and MA Blackman
We have used T-cell receptor beta-chain transgenic mice to determine the
effects of a limited T-cell receptor repertoire on major histocompatibility
complex class I-restricted epitope selection during the course of an
influenza virus infection. Analysis of T-cell hybridomas generated from
wild-type and transgenic mice demonstrated that the viral epitope
recognized depended on the available T-cell receptor repertoire. Wild-type
T-cell hybridomas recognized epitopes derived from the nucleoprotein and
basic polymerase molecules, whereas hybridomas generated from transgenic
mice recognized epitopes derived from the nonstructural protein and the
matrix protein. There was no overlap in specificity between the two panels
of hybridomas. This reciprocal pattern of specificity was also apparent in
cytoxicity assays with brochoalveolar lavage cells isolated from the lungs
of influenza virus-infected mice. T-cell receptor usage in the transgenic
hybridomas was very restricted, with only one V alpha element used for ech
of the two viral epitopes recognized. In the case of the hybridomas
reactive to the nonstructural protein, sequence analysis showed that they
all expressed V alpha 4J alpha 32 chains associated with the same
junctional amino acids (Leu-Leu) that were encoded by five different
nucleotide sequences, indicating a strong selection for T-cell receptor
usage. Taken together, these data demonstrate that the available T-cell
receptor repertoire can have a profound effect on the immunodominance of
class I-restricted epitopes during a viral infection.
Copyright © 1995, American Society for Microbiology
Immunodominance of major histocompatibility complex class I-restricted influenza virus epitopes can be influenced by the T-cell receptor repertoire
Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.
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