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Negative selection of thymocytes expressing the D10 TCR.

Abstract：

:We have analyzed the patterns of positive and negative selection of thymocytes expressing the T cell antigen receptor (TCR) from the D10.G4.1 T cell clone. This TCR confers reactivity to several non-self MHC class II alleles with a remarkably broad range of avidities. Therefore, negative selection can be studied when induced by high-, intermediate-, or low-avidity interactions with endogenous peptide-MHC complexes, all within the same TCR transgenic system. These data directly demonstrate that MHC class II-peptide ligands that fail to activate mature T cells can promote negative selection of immature thymocytes. Additionally, we show that negative selection of thymocytes can occur at two distinct "time points" during development depending on the avidity of the TCR for the MHC-peptide complex. Finally, we show that the self-peptide repertoire plays a significant role in selection because alteration of the self-peptide repertoire by disruption of the H2-Ma gene drastically alters selection of D10 TCR-expressing thymocytes.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Sant'Angelo DB,Janeway CA Jr

doi

10.1073/pnas.102182499

keywords:

subject

Has Abstract

pub_date

2002-05-14 00:00:00

pages

6931-6

issue

10

eissn

0027-8424

issn

1091-6490

pii

99/10/6931

journal_volume

99

pub_type

杂志文章

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