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Mutant HLA-A2 antigens as restricting elements for virus-specific cytotoxic T cells.

Abstract：

:Mutants of the EB virus-transformed cell line T5-1 (HLA-A1, 2; B8, 27), bearing well-characterized alterations in HLA-A2 antigen expression and unable to bind the HLA-A2-specific monoclonal antibody BB7.2, have been tested for their susceptibility to EB virus-specific cytolysis using effector T-cell preparations functionally restricted through relevant HLA antigens. Initial experiments first confirmed that the parent line T5-1 was susceptible to cytolysis by both "common" A2-restricted and B27-restricted effector cells. While those T5-1 mutants with little or no surface A2 expression were not lysed by A2-restricted effectors, those targets with quantitatively normal expression of mutant A2 molecules were as susceptible to A2-restricted lysis as the parent line itself. In contrast, all the T5-1 mutant lines were susceptible to B27-restricted cytolysis. The results demonstrate that experimentally induced mutations of HLA-A2 antigen structure, affecting a serologically defined site on the molecule, can occur without altering that same molecule's expression of the T cell-restricting determinant(s). Such experimentally induced mutations are quite different from the naturally occurring "variant" A2 antigens which are present within the serologically defined A2 antigen group and which show changes at the T cell-restricting site.

journal_name

Immunogenetics

journal_title

Immunogenetics

authors

Gaston JS,Wallace LE,Rickinson AB,Epstein MA,Pious D

doi

10.1007/BF00403438

subject

Has Abstract

pub_date

1984-01-01 00:00:00

pages

475-86

issue

6

eissn

0093-7711

issn

1432-1211

journal_volume

19

pub_type

杂志文章

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