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- W1931389520 abstract "We have analyzed the ability of T cells to recognize peptides corresponding in sequence to an allogeneic HLA-DR molecule, in context of syngeneic MHC. PBMC from a responder with the HLA-DR beta 1*1101/DR beta 1*1201 genotype were stimulated in vitro with a mixture of four synthetic peptides derived from the first domain of the DR beta 1*0101 chain (amino acid residue 1-20, 21-42, 43-62, and 66-90). An alloreactive T cell line, TCL-LS, which proliferates only in response to peptide 21-42 presented by HLA-DR beta 1*1101, was obtained. The blastogenic response of the line was inhibited by anti-HLA-DR and CD4 antibodies but was not affected by antibodies to HLA-DQ, HLA-DP, HLA-ABC, and CD8. In the presence of irradiated, autologous APC, TCL-LS displayed specific proliferative responses to stimulating cells obtained from individuals carrying the DR beta 1*0101 allele. In the absence of autologous APC, TCL-LS recognized HLA-DR1 on allogeneic cells only when expressed together with HLA-DR beta 1*1101, the restrictive element. This indicates that TCL-LS recognizes processed HLA-DR1 molecule presented as nominal Ag. Study of TCR-V beta gene repertoire expressed by TCL-LS showed that only two V beta genes were used (V beta 13.2 and V beta 12). Two T cell clones (TCC) derived from this line, TCC-A5 and B4, exhibited a similar pattern of reactivity and expressed V beta 13.2. These results indicate that T cells recognizing peptides, which are derived from the breakdown of allogeneic MHC class II proteins and are presented by self-HLA-DR molecules, participate in allorecognition." @default.
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- W1931389520 date "1991-10-01" @default.
- W1931389520 modified "2023-09-29" @default.
- W1931389520 title "T cell recognition of allo-peptides in context of syngeneic MHC" @default.
- W1931389520 doi "https://doi.org/10.1016/0198-8859(91)90163-4" @default.
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- W1931389520 hasPublicationYear "1991" @default.
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