Toxoplasma gondii: comparison of human CD34+ and monocyte-derived dendritic cells after parasite infection

Exp Parasitol. 2007 Jan;115(1):103-6. doi: 10.1016/j.exppara.2006.06.003. Epub 2006 Aug 4.

Abstract

Human dendritic cells (DC) obtained in vitro from CD34(+) progenitors (CD34-DC) or blood monocytes (mo-DC) are different DC which may be used in a model of T. gondii infection. We compared the survival, infection rate and cell surface receptor expression of both DC types after living T. gondii tachyzoite infection. CD34-DC appeared less resistant to the parasite than mo-DC. At 48h post-infection, chemokine receptors responsible for DC homing and migration were absent in mo-DC, while down regulation of CCR6 and up regulation of CCR7 was observed in CD34-DC. This result, suggesting migration ability of CD34-DC, was confirmed by in vitro migration experiments against different chemokines. Tachyzoite supernatant, used as chemokine, attracted immature CD34-DC as observed by MIP3alpha, while MIP3beta, as expected, attracted mature CD34-DC. Under similar conditions, no significant difference was noticed between mature or immature mo-DC. These data indicated that CD34-DC represent an alternative model that allows migration assay of infected DC by T. gondii.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigens, CD34 / analysis*
  • Antigens, CD34 / immunology
  • Cell Movement / immunology
  • Dendritic Cells / immunology*
  • Dendritic Cells / parasitology
  • Female
  • Humans
  • Mice
  • Monocytes / cytology*
  • Monocytes / immunology
  • Receptors, Chemokine / metabolism
  • Toxoplasma / immunology*
  • Toxoplasmosis / blood
  • Toxoplasmosis / immunology*

Substances

  • Antigens, CD34
  • Receptors, Chemokine