Mechanism of Human Natural Killer Cell Activation byHaemophilus ducreyi
Open Access
- 15 August 2009
- journal article
- Published by Oxford University Press (OUP) in The Journal of Infectious Diseases
- Vol. 200 (4), 590-598
- https://doi.org/10.1086/600123
Abstract
The role of natural killer (NK) cells in the host response to Haemophilus ducreyi infection is unclear. In pustules obtained from infected human volunteers, there was an enrichment of CD56bright NK cells bearing the activation markers CD69 and HLA-DR, compared with peripheral blood. To study the mechanism by which H. ducreyi activated NK cells, we used peripheral blood mononuclear cells from uninfected volunteers. H. ducreyi activated NK cells only in the presence of antigen-presenting cells. H. ducreyi–infected monocytes and monocyte-derived macrophages activated NK cells in a contact- and interleukin-18 (IL-18)–dependent manner, whereas monocyte-derived dendritic cells induced NK activation through soluble IL-12. More lesional NK cells than peripheral blood NK cells produced IFN-γ in response to IL-12 and IL-18. We conclude that NK cells are recruited to experimental lesions and likely are activated by infected macrophages and dendritic cells. IFN-γ produced by lesional NK cells may facilitate phagocytosis of H. ducreyiKeywords
This publication has 44 references indexed in Scilit:
- A Fibrinogen-Binding Lipoprotein Contributes to the Virulence ofHaemophilus ducreyiin HumansThe Journal of Infectious Diseases, 2009
- Increased proportion of CD56bright natural killer cells in active and inactive systemic lupus erythematosusImmunology, 2008
- TLR-dependent cross talk between human Kupffer cells and NK cellsThe Journal of Experimental Medicine, 2008
- Dysregulated Immune Profiles for Skin and Dendritic Cells Are Associated with Increased Host Susceptibility toHaemophilus ducreyiInfection in Human VolunteersInfection and Immunity, 2007
- Haemophilus ducreyi Partially Activates Human Myeloid Dendritic CellsInfection and Immunity, 2007
- NK cells at the interface between innate and adaptive immunityCell Death & Differentiation, 2007
- Phagocytosis ofBorrelia burgdorferiandTreponema pallidumPotentiates Innate Immune Activation and Induces Gamma Interferon ProductionInfection and Immunity, 2007
- Regulation of natural killer cell activityCurrent Opinion in Immunology, 2006
- NK-dependent DC maturation is mediated by TNFα and IFNγ released upon engagement of the NKp30 triggering receptorBlood, 2005
- Differences in Host Susceptibility to Disease Progression in the Human Challenge Model ofHaemophilus ducreyiInfectionInfection and Immunity, 2003