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- W2051275482 abstract "Products of specific mouse Mtv genes expressed in association with mouse MHC class II products cause the deletion of T cells expressing particular TCR V beta gene segments. These endogenous deletion ligands have been termed superantigens due to their ability to negatively select entire T-cell families, as defined by V beta-chain usage. In most cases, deletion is preferentially effected through interaction of the Mtv ligand with H-2E products. Although human DR alpha shares only 75% identity with the E alpha chain of H-2E, it has previously been shown to substitute for the mouse homologue in its capacity to induce the deletion of V beta 11- and V beta 17a-bearing T cells. In the present study, we have undertaken a more comprehensive analysis of the interaction of mixed DR alpha/E beta pairs with various endogenous Mtv integrants in various mouse backgrounds, leading to negative selection of particular V beta families. We show in this paper that transgenic DR alpha/E beta can also efficiently interact with products of Mtv-7, causing deletion of both V beta 6+ and V beta 7+ cells. Deletion of V beta 11+ T cells in DRA transgenic mice carrying Mtv-8 and -9, however, was less efficient than in control H-2Ea transgenic mice. These data and those from other MHC transgenic mouse studies show that while the class II alpha chain can influence the interaction with superantigen, it is the identity of the beta chain that seems to be critical.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2051275482 date "1993-07-01" @default.
- W2051275482 modified "2023-10-14" @default.
- W2051275482 title "Mouse mammary tumor virus-mediated T-cell receptor negative selection in HLA-DRA transgenic mice" @default.
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- W2051275482 doi "https://doi.org/10.1016/0198-8859(93)90180-9" @default.
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