期刊
NATURE IMMUNOLOGY
卷 5, 期 6, 页码 597-605出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ni1070
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- NIAID NIH HHS [1R01AI51530] Funding Source: Medline
Thymocytes displaying self-reactive T cell receptors usually undergo negative selection in the thymus. Here we demonstrate that agonist peptides can promote positive selection of immature double-positive thymocytes into distinct lineages, varying with the agonist concentration and the animal's age. Microarray gene expression analyses showed broad transcriptional alterations in a set of transcripts associated with the innate immune system, as well as silencing of CD8beta expression. The resulting CD8alphaalpha T cells showed a rapid effector cytokine response. Hence, T cells displaying self-reactive receptors can have the gene expression profile and phenotypic characteristics of innate immune cells.
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