Late stages of T cell maturation in the thymus involve NF-κB and tonic type i interferon signaling

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Abstract

Positive selection occurs in the thymic cortex, but critical maturation events occur later in the medulla. Here we defined the precise stage at which T cells acquired competence to proliferate and emigrate. Transcriptome analysis of late gene changes suggested roles for the transcription factor NF-κB and interferon signaling. Mice lacking the inhibitor of NF-κB (IκB) kinase (IKK) kinase TAK1 underwent normal positive selection but exhibited a specific block in functional maturation. NF-κB signaling provided protection from death mediated by the cytokine TNF and was required for proliferation and emigration. The interferon signature was independent of NF-κB; however, thymocytes deficient in the interferon-α (IFN-α) receptor IFN-αR showed reduced expression of the transcription factor STAT1 and phenotypic abnormality but were able to proliferate. Thus, both NF-κB and tonic interferon signals are involved in the final maturation of thymocytes into naive T cells.

Original languageEnglish (US)
Pages (from-to)565-573
Number of pages9
JournalNature immunology
Volume17
Issue number5
DOIs
StatePublished - May 1 2016

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Thymus Gland
Interferons
T-Lymphocytes
Thymocytes
Phosphotransferases
Interferon Receptors
STAT1 Transcription Factor
Emigration and Immigration
Gene Expression Profiling
Mental Competency
Transcription Factors
Cytokines
Genes

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Late stages of T cell maturation in the thymus involve NF-κB and tonic type i interferon signaling. / Xing, Yan; Wang, Xiaodan; Jameson, Stephen C; Hogquist, Kristin A.

In: Nature immunology, Vol. 17, No. 5, 01.05.2016, p. 565-573.

Research output: Contribution to journalArticle

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