CX3CR1+ interstitial dendritic cells form a contiguous network throughout the entire kidney

Kidney Int. 2006 Aug;70(3):591-6. doi: 10.1038/sj.ki.5001567. Epub 2006 Jun 7.

Abstract

Dendritic cells (DCs) interface innate and adaptive immunity in nonlymphoid organs; however, the exact distribution and types of DC within the kidney are not known. We utilized CX3CR1GFP/+ mice to characterize the anatomy and phenotype of tissue-resident CX3CR1+ DCs within normal kidney. Laser-scanning confocal microscopy revealed an extensive, contiguous network of stellate-shaped CX3CR1+ DCs throughout the interstitial and mesangial spaces of the entire kidney. Intravital microscopy of the superficial cortex showed stationary interstitial CX3CR1+ DCs that continually probe the surrounding tissue environment through dendrite extensions. Flow cytometry of renal CX3CR1+ DCs showed significant coexpression of CD11c and F4/80, high major histocompatibility complex class II and FcR expression, and immature costimulatory but competent phagocytic ability indicative of tissue-resident, immature DCs ready to respond to environment cues. Thus, within the renal parenchyma, there exists little immunological privilege from the surveillance provided by renal CX3CR1+ DCs, a major constituent of the heterogeneous mononuclear phagocyte system populating normal kidney.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • CX3C Chemokine Receptor 1
  • Cell Communication / immunology*
  • Dendritic Cells / cytology*
  • Dendritic Cells / immunology
  • Flow Cytometry
  • Green Fluorescent Proteins / genetics
  • Immune System / cytology
  • Immune System / immunology
  • Kidney / cytology*
  • Kidney / immunology*
  • Mice
  • Mice, Transgenic
  • Phagocytes / cytology
  • Phagocytes / immunology
  • Receptors, Chemokine / genetics
  • Receptors, Chemokine / immunology*

Substances

  • CX3C Chemokine Receptor 1
  • Cx3cr1 protein, mouse
  • Receptors, Chemokine
  • Green Fluorescent Proteins