Abstract
Interleukin 10 (IL-10) has a prominent function in regulating the balance between protective and pathological T cell responses. Consistent with that activity, many sources of this cytokine are found in vivo, including from myeloid cells and a variety of T cell subsets. However, although there are many pathways that regulate innate production of IL-10, the factors that govern its synthesis by the adaptive response are poorly understood. Here we report that IL-27 and IL-6 induced T helper type 1 and type 2 cells, as well as T helper cells that produce IL-17, to secrete IL-10. This effect was dependent on the transcription factors STAT1 and STAT3 for IL-27 and on STAT3 for IL-6. Our studies identify a previously unknown pathway that allows the immune system to temper inflammatory responses.
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Acknowledgements
WSX-1-deficient (Il27ra−/−) mice were provided by C. Saris (Amgen); BALB/c Il10−/− mice were originally obtained from R. Coffman (DNAX); Stat1−/− mice were provided by P. Scott (University of Pennsylvania); Foxp3GFP mice were provided by L. Turka (University of Pennsylvania); and CD4-Cre–Stat3−/− mice were provided by J.J. O′Shea (National Institutes of Health). Supported by the National Institutes of Health (AI42334 and AI41158 to C.H.; AI 43620 to L.T.; 1-T32-AI-055428 to J.S.S.; and 1-T32-AI-07532 to J.S.), the Scholler Foundation, the State of Pennsylvania, and the National Health and Medical Research Council of Australia.
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J.S.S. and C.A.H. contributed to all studies; J.S. and M.E. were involved in the analysis and interpretation of the p-STAT1 and p-STAT3 signaling experiments; T.H.H. was involved in the analysis of IL-10 expression by real-time quantitative PCR; A.L. and J.J.O. contributed to the studies of Stat3−/− CD4+ T cells; and P.M.P. and L.A.T. contributed to the studies of the Foxp3GFP mice.
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Stumhofer, J., Silver, J., Laurence, A. et al. Interleukins 27 and 6 induce STAT3-mediated T cell production of interleukin 10. Nat Immunol 8, 1363–1371 (2007). https://doi.org/10.1038/ni1537
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DOI: https://doi.org/10.1038/ni1537
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