Lipopolysaccharide and ceramide docking to CD14 provokes ligand-specific receptor clustering in rafts

  • Alexandra Pfeiffer
  • , Alfred Bttcher
  • , Evelyn Ors
  • , Michael Kapinsky
  • , Peter Nagy
  • , Andrea Bodnr
  • , Ingo Spreitzer
  • , Gerhard Liebisch
  • , Wolfgang Drobnik
  • , Klaus Gempel
  • , Markus Horn
  • , Stefan Holmer
  • , Thomas Hartung
  • , Gabriele Multhoff
  • , Gerhard Schtz
  • , Hansgeorg Schindler
  • , Artur J. Ulmer
  • , Holger Heine
  • , Felix Stelter
  • , Christine Schtt
  • Gregor Rothe, János Szöllősi, Sndor Damjanovich, Gerd Schmitz

Research output: Contribution to journalArticlepeer-review

277 Scopus citations

Abstract

The glycosylphosphatidylinositol-anchored receptor CD14 plays a major role in the inflammatory response of monocytes to lipopolysaccharide. Here, we describe that ceramide, a constituent of atherogenic lipoproteins, binds to CD14 and induces clustering of CD14 to co-receptors in rafts. In resting cells, CD14 was associated with CD55, the Fcγ-receptors CD32 and CD64 and the pentaspan CD47. Ceramide further recruited the complement receptor 3 (CD11b/CD18) and CD36 into proximity of CD14. Lipopolysaccharide, in addition, induced co-clustering with Toll-like receptor 4, Fcγ-RIIIa (CD16a) and the tetraspanin CD81 while CD47 was dissociated. The different receptor complexes may be linked to ligand-specific cellular responses initiated by CD14.

Original languageEnglish
Pages (from-to)3153-3164
Number of pages12
JournalEuropean Journal of Immunology
Volume31
Issue number11
DOIs
StatePublished - 2001
Externally publishedYes

Keywords

  • CD14
  • Ceramide
  • Lipopolysaccharide
  • Rafts
  • Receptor complexes

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