Cutaneous innate immune sensing of toll-like receptor 2-6 ligands suppresses T cell immunity by inducing myeloid-derived suppressor cells

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Yuliya Skabytska - , University of Tübingen (Author)
  • Florian Wölbing - , University of Tübingen (Author)
  • Claudia Günther - , Department of Dermatology, TUD Dresden University of Technology (Author)
  • Martin Köberle - , University of Tübingen, Technical University of Munich (Author)
  • Susanne Kaesler - , University of Tübingen (Author)
  • Ko Ming Chen - , University of Tübingen (Author)
  • Emmanuella Guenova - , University of Tübingen, University of Zurich (Author)
  • Doruk Demircioglu - , University of Tübingen (Author)
  • Wolfgang E. Kempf - , University of Tübingen, Technical University of Munich (Author)
  • Thomas Volz - , University of Tübingen, Technical University of Munich (Author)
  • Hans Georg Rammensee - , University of Tübingen (Author)
  • Martin Schaller - , University of Tübingen (Author)
  • Martin Röcken - , University of Tübingen (Author)
  • Friedrich Götz - , University of Tübingen (Author)
  • Tilo Biedermann - , University of Tübingen, Technical University of Munich (Author)

Abstract

Skin is constantly exposed to bacteria and antigens, and cutaneous innate immune sensing orchestrates adaptive immune responses. In its absence, skin pathogens can expand, entering deeper tissues and leading to life-threatening infectious diseases. To characterize skin-driven immunity better, we applied living bacteria, defined lipopeptides, and antigens cutaneously. We found suppression of immune responses due to cutaneous infection with Gram-positive S.aureus, which was based on bacterial lipopeptides. Skin exposure to Toll-like receptor (TLR)2-6-binding lipopeptides, but not TLR2-1-binding lipopeptides, potently suppressed immune responses through induction of Gr1+CD11b+ myeloid-derived suppressor cells (MDSCs). Investigating human atopic dermatitis, in which Gram-positive bacteria accumulate, we detected high MDSC amounts in blood and skin. TLR2 activation in skin resident cells triggered interleukin-6 (IL-6), which induced suppressive MDSCs, which are then recruited to the skin suppressing Tcell-mediated recall responses such as dermatitis. Thus, cutaneous bacteria can negatively regulate skin-driven immune responses by inducing MDSCs via TLR2-6 activation.

Details

Original languageEnglish
Pages (from-to)762-775
Number of pages14
JournalImmunity
Volume41
Issue number5
Publication statusPublished - 20 Nov 2014
Peer-reviewedYes

External IDs

PubMed 25456159
ORCID /0000-0002-4330-1861/work/151982018

Keywords