Thymocyte deletion can bias Treg formation toward low-abundance self-peptide.
Thymocyte deletion can bias Treg formation toward low-abundance self-peptide.
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DOI:
10.1002/eji.200939709
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发表时间:
2009-12
影响因子:
5.4
通讯作者:
Caton, Andrew J.
中科院分区:
文献类型:
--
作者:
Picca, Cristina Cozzo;Oh, Soyoung;Panarey, Laura;Aitken, Malinda;Basehoar, Alissa;Caton, Andrew J.
Autoreactive CD4+ T cells can undergo deletion and/or become CD25+Foxp3+ Treg cells as they develop intrathymically, but how these alternative developmental fates are specified based on interactions with self-peptide(s) is not understood. We show here that thymocytes expressing an autoreactive TCR can be subjected to varying degrees of deletion that correlate with the amount of self-peptide. Strikingly, among thymocytes that evade deletion, similar proportions acquire Foxp3 expression. These findings provide evidence that Foxp3+ Treg cells can develop among members of a cohort of autoreactive thymocytes that have evaded deletion by a self-peptide, and that deletion and Treg cell formation can act together to bias the Treg cell repertoire toward low abundance self-peptide(s).
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