Regulation of T cells and cytokines by the interleukin-10 (IL-10)-family cytokines IL-19, IL-20, IL-22, IL-24 and IL-26

Haluk B. Oral, Sergei V. Kotenko, Mustafa Yilmaz, Orlando Mani, Judith Zumkehr, Kurt Blaser, Cezmi A. Akdis, Mübeccel Akdis

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122 Scopus citations


The family of IL-10-related cytokines includes several human members, IL-19, IL-20, IL-22, IL-24 and IL-26, and a series of herpesviral and poxviral paralogs. Some of these cytokines share common receptor subunits. In this study, we investigated the effects of these cytokines on naive T cell differentiation, antigen-specific T cell suppression, survival and expression of surface markers in comparison to IL-10 and cytomegalovirus (CMV)-IL-10. Human CD45RA+ T cells were stimulated in the presence of IL-10-family cytokines in sequential 12-day cycles. After three to four cycles of stimulation, IL-10 and CMV-IL-10 led to increased IFN-γ and IL-10 but decreased IL-4 and IL-13. Interestingly, long-term exposure of T cells to IL-19, IL-20 and IL-22 down-regulated IFN-γ but upregulated IL-4 and IL-13 in T cells and supported the polarization of naive T cells to Th2-like cells. In contrast, neutralization of endogenous IL-22 activity by IL-22-binding protein decreased IL-4, IL-13 and IFN-γ synthesis. The antigen-specific suppressor activity of IL-10 and CMV-IL-10 was not observed for any of the other IL-10-family cytokines. These data demonstrate that IL-19, IL-20 and IL-22 may participate in T cell-mediated diseases by distinct regulation of T cell cytokine profiles.

Original languageEnglish (US)
Pages (from-to)380-388
Number of pages9
JournalEuropean Journal of Immunology
Issue number2
StatePublished - Feb 2006

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology


  • Interleukin-10
  • New Cytokines
  • T cells


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