Article

Vaccination with irradiated cercariae of Schistosoma mansoni preferentially induced the accumulation of interferon-gamma producing T cells in the skin and skin draining lymph nodes of mice.

Department of Biomedical Sciences, College of Medicine, University of Illinois, Rockford 61107, USA.
Parasitology International (impact factor: 2.13). 09/1999; 48(2):109-19. pp.109-19
Source: PubMed

ABSTRACT Cytokine response to schistosomula of Schistosoma mansoni was evaluated in the skin of mice during the initial 72 h following infection. These studies showed a significant increase in the levels of IL-4 and IL-10 message in the skin in areas of cercarial penetration. The IL-4 message was detectable in the skin as early as 8 h after infection and the message for IL-10 appeared from 16 h after infection. However, mRNA for IFN-gamma was undetectable in the skin samples for up to 72 h after infection with normal cercariae. In sharp contrast, vaccination with irradiated cercariae induced IFN-gamma and IL-2 responses in the skin within 24 h. Analysis of the cytokine profile of cells isolated from the skin during these early time points showed that T cells are probably not a source of IL-4 or IL-10 in the skin of mice infected with normal cercariae. However, in vaccinated animals, the majority of the IFN-gamma is derived from skin-residing T cells. In vaccinated animals, responses in the skin were mirrored in the skin-draining lymph nodes as well. Analysis of the CD4/CD8 ratio showed a significant decrease in the skin following vaccination suggesting an increase in CD8+ cells. Interestingly however, when vaccinated animals were challenged with normal cercariae, there was a significant reduction in IFN-gamma response in the skin and its draining lymph nodes. These results show that vaccination with irradiated cercariae of S. mansoni, preferentially induce the accumulation of IFN-gamma producing T cells in the skin and skin-draining lymph nodes of mice.

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    [show abstract] [hide abstract]
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Keywords

24 h. Analysis
 
CD8+ cells
 
cercarial penetration
 
draining lymph nodes
 
IFN-gamma response
 
IL-10 message
 
IL-4 message
 
initial 72 h
 
irradiated cercariae
 
irradiated cercariae induced IFN-gamma
 
normal cercariae
 
Schistosoma mansoni
 
schistosomula
 
sharp contrast
 
significant decrease
 
skin samples
 
skin-draining lymph nodes
 
skin-residing T cells
 
T cells
 
time points