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J Leukoc Biol. 2013 Dec;94(6):1103-12. doi: 10.1189/jlb.0213064. Epub 2013 Jun 14.

IL-4 induces a suppressive IL-10-producing CD8+ T cell population via a Cdkn2a-dependent mechanism.

Author information

1
2.College of Life Sciences, Nankai University, Tianjin 300071, China. yinzn@nankai.edu.cn or lqzhao@nankai.edu.cn.

Abstract

CD8(+) T cells play an important role in immune regulation and effective immune responses against tumor cells, viral infection, and intracellular pathogens. In this report, using tiger or 10BiT mice, we defined a population of IL-10-producing CD8(+) T cells that were induced by IL-4. These IL-10(+)CD8(+) T cells possessed a strong inhibitory effect on the CD4(+) T cell proliferation in an IL-10-dependent and cell contact-dependent fashion. In comparison with IL-10(-)CD8(+) T cells, IL-10(+)CD8(+) T cells expressed an array of Th2-like cytokines (IL-4, IL-5), perforin, and granzymes, as well as the cell cycle regulatory protein Cdkn2a. Interestingly, knockdown of cdkn2a using siRNA reduced IL-4-induced IL-10 production significantly. Furthermore, CD8(+) T cells from Cdkn2a(-/-) mice produced a significantly lower amount of IL-10, and the effect was limited to CD8(+) T cells but not observed in CD4(+) T cells and APCs. Finally, IL-10(+)CD8(+) T cells played a protective role in the TNBS-induced murine colitis model, indicating a critical role of this population of CD8(+) T cells in regulatory immune responses. Taken together, we have defined a population of IL-10-producing CD8(+) Tregs induced by IL-4 and mediated by Cdkn2a.

KEYWORDS:

differentiation; suppression; transcription factor

PMID:
23772040
PMCID:
PMC6607996
DOI:
10.1189/jlb.0213064
[Indexed for MEDLINE]
Free PMC Article

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