Mouse CCL8, a CCR8 agonist, promotes atopic dermatitis by recruiting IL-5+ T(H)2 cells

Nat Immunol. 2011 Feb;12(2):167-77. doi: 10.1038/ni.1984. Epub 2011 Jan 9.


Mouse CCL8 is a CC chemokine of the monocyte chemoattractant protein (MCP) family whose biological activity and receptor usage have remained elusive. Here we show that CCL8 is highly expressed in the skin, where it serves as an agonist for the chemokine receptor CCR8 but not for CCR2. This distinguishes CCL8 from all other MCP chemokines. CCL8 responsiveness defined a population of highly differentiated, CCR8-expressing inflammatory T helper type 2 (T(H)2) cells enriched for interleukin (IL)-5. Ccr8- and Ccl8-deficient mice had markedly less eosinophilic inflammation than wild-type or Ccr4-deficient mice in a model of chronic atopic dermatitis. Adoptive transfer studies established CCR8 as a key regulator of T(H)2 cell recruitment into allergen-inflamed skin. In humans, CCR8 expression also defined an IL-5-enriched T(H)2 cell subset. The CCL8-CCR8 chemokine axis is therefore a crucial regulator of T(H)2 cell homing that drives IL-5-mediated chronic allergic inflammation.

Publication types

  • Comparative Study

MeSH terms

  • Adoptive Transfer
  • Animals
  • Calcium Signaling / immunology
  • Cells, Cultured
  • Chemokine CCL1 / genetics
  • Chemokine CCL1 / immunology
  • Chemokine CCL1 / metabolism*
  • Chemokine CCL8 / genetics
  • Chemokine CCL8 / immunology
  • Chemokine CCL8 / metabolism*
  • Chemotaxis / genetics
  • Chemotaxis / immunology
  • Cloning, Molecular
  • Dermatitis, Atopic / immunology*
  • Disease Models, Animal
  • Humans
  • Interleukin-5 / immunology
  • Interleukin-5 / metabolism
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Receptors, Lymphocyte Homing / immunology
  • Skin / pathology*
  • Th2 Cells / immunology
  • Th2 Cells / metabolism*
  • Th2 Cells / pathology


  • Ccl1 protein, mouse
  • Chemokine CCL1
  • Chemokine CCL8
  • Interleukin-5
  • Receptors, Lymphocyte Homing