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Thymic selection of CD4+CD25+ regulatory T cells induced by an agonist self-peptide

Thymic selection of CD4+CD25+ regulatory T cells induced by an agonist self-peptide Despite accumulating evidence that regulatory T cells play a crucial role in preventing autoimmunity, the processes underlying their generation during immune repertoire formation are unknown. We show here that interactions with a single self-peptide can induce thymocytes that bear an autoreactive T cell receptor (TCR) to undergo selection to become CD4+CD25+ regulatory T cells. Selection of CD4+CD25+ thymocytes appears to require a TCR with high affinity for a self peptide because thymocytes that bear TCRs with low affinity do not undergo selection into this pathway. Our findings indicate that specificity for self-peptides directs the selection of CD4+CD25+ regulatory thymocytes by a process that is distinct from positive selection and deletion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nature Immunology Springer Journals

Thymic selection of CD4+CD25+ regulatory T cells induced by an agonist self-peptide

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References (39)

Publisher
Springer Journals
Copyright
Copyright © 2001 by Nature Publishing Group
Subject
Biomedicine; Biomedicine, general; Immunology; Infectious Diseases
ISSN
1529-2908
eISSN
1529-2916
DOI
10.1038/86302
Publisher site
See Article on Publisher Site

Abstract

Despite accumulating evidence that regulatory T cells play a crucial role in preventing autoimmunity, the processes underlying their generation during immune repertoire formation are unknown. We show here that interactions with a single self-peptide can induce thymocytes that bear an autoreactive T cell receptor (TCR) to undergo selection to become CD4+CD25+ regulatory T cells. Selection of CD4+CD25+ thymocytes appears to require a TCR with high affinity for a self peptide because thymocytes that bear TCRs with low affinity do not undergo selection into this pathway. Our findings indicate that specificity for self-peptides directs the selection of CD4+CD25+ regulatory thymocytes by a process that is distinct from positive selection and deletion.

Journal

Nature ImmunologySpringer Journals

Published: Apr 1, 2001

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