4.8 Article

Interleukin-10 Production by Th1 Cells Requires Interleukin-12-Induced STAT4 Transcription Factor and ERK MAP Kinase Activation by High Antigen Dose

Journal

IMMUNITY
Volume 31, Issue 2, Pages 209-219

Publisher

CELL PRESS
DOI: 10.1016/j.immuni.2009.05.012

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Funding

  1. Medical Research Council, UK
  2. Howard Hughes Medical Institute
  3. MRC [MC_U117565642] Funding Source: UKRI
  4. Medical Research Council [MC_U117565642] Funding Source: researchfish

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CD4(+) T cells producing interleukin-10 (IL-10) and interferon-gamma (IFN-gamma) are reported in chronic infections. However, the signals that direct the development of IL-10-producing T helper 1 (Th1) cells are undefined. We showed that development of IL-10-producing Th1 cells required high T cell receptor (TCR) ligation, sustained ERK1 and ERK2 MAP kinases phosphorylation, and IL-12-induced STAT4 transcription factor activation. Repeated TCR triggering led to enhanced IL-10 production by Th1 cells, and continued IL-12 action and high-dose TCR signaling were required for the development and maintenance of IL-10-producing Th1 cells. Although Th1, Th2, and Th17 cells require the activation of distinct STATs for their differentiation, activation of ERK1 and ERK2 was a common requirement for production of IL-10 by all Th cell subsets. IL-10 expression also correlated with c-maf expression. Despite having distinct functions in protection against pathogens, all Th cells share the important task of controlling overexuberant immune responses by means of IL-10 production.

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