Origins and functional specialization of macrophages and of conventional and monocyte-derived dendritic cells in mouse skin

Immunity. 2013 Nov 14;39(5):925-38. doi: 10.1016/j.immuni.2013.10.004. Epub 2013 Oct 31.


In the skin, the lack of markers permitting the unambiguous identification of macrophages and of conventional and monocyte-derived dendritic cells (DCs) complicates understanding of their contribution to skin integrity and to immune responses. By combining CD64 and CCR2 staining, we successfully identified each of these cell types and studied their origin, transcriptomic signatures, and migratory and T cell stimulatory properties. We also analyzed the impact of microbiota on their development and their contribution to skin inflammation during contact hypersensitivity. Dermal macrophages had a unique scavenging role and were unable to migrate and activate T cells. Conventional dermal DCs excelled both at migrating and activating T cells. In the steady-state dermis, monocyte-derived DCs are continuously generated by extravasated Ly-6C(hi) monocytes. Their T cell stimulatory capacity combined with their poor migratory ability made them particularly suited to activate skin-tropic T cells. Therefore, a high degree of functional specialization occurs among the mononuclear phagocytes of the skin.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigens, Differentiation / analysis
  • CD11b Antigen / analysis
  • Cell Lineage
  • Chemotaxis, Leukocyte
  • Chromatography, Gel
  • Dendritic Cells / cytology*
  • Dendritic Cells / immunology
  • Dermatitis, Contact / immunology
  • Dermatitis, Contact / pathology
  • Dermis / cytology
  • Gene Expression Regulation, Developmental
  • Immunophenotyping / methods
  • Langerhans Cells / cytology
  • Langerhans Cells / immunology
  • Lymphocyte Cooperation
  • Macrophages / cytology*
  • Macrophages / physiology
  • Mice
  • Microbiota / immunology
  • Monocytes / cytology
  • Principal Component Analysis
  • Radiation Chimera
  • Receptors, CCR2 / analysis
  • Receptors, IgG / analysis
  • Skin / cytology*
  • Skin / immunology
  • Skin / microbiology
  • Specific Pathogen-Free Organisms
  • Staining and Labeling / methods
  • Transcriptome


  • Antigens, Differentiation
  • CD11b Antigen
  • Ccr2 protein, mouse
  • Receptors, CCR2
  • Receptors, IgG

Associated data

  • GEO/GSE49358