Schistosoma mansoni antigens alter the cytokine response in vitro during cutaneous leishmaniasis
Mem. Inst. Oswaldo Cruz
;
106(7): 856-863, Nov. 2011. ilus, graf, tab
Article
in English
| LILACS
| ID: lil-606650
ABSTRACT
Schistosoma mansoni infection or associated products are able to down-modulate the type 1 CD4+ T cell inflammatory response characteristic of autoimmune diseases. In this study, we evaluated how S. mansoni antigens altered the immune response that was induced by the soluble Leishmania antigen (SLA) from cutaneous leishmaniasis (CL) patients. Cytokines were measured from the supernatants of peripheral blood mononuclear cell cultures stimulated with SLA. This was performed using the sandwich enzyme linked immunosorbent assay technique in the presence or absence of S. mansoni recombinant antigens Sm29, SmTSP-2 and PIII. The addition of S. mansoni antigens to the cultures resulted in the reduction of interferon gamma (IFN-γ) levels in 37-50 percent of patients. Although to a lesser extent, the antigens were also able to decrease the production of tumour necrosis factor-alpha (TNF-α). We compared patients that either had or did not have reduction in IFN-γ and TNF-α production in cultures stimulated with SLA in the presence of S. mansoni antigens. We found that there was no significant difference in the levels of interleukin (IL)-10 and IL-5 in response to S. mansoni antigens between the groups. The antigens used in this study down-modulated the in vitro proinflammatory response induced by SLA in a group of CL patients through a currently undefined mechanism.
Full text:
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Index:
LILACS (Americas)
Main subject:
Schistosoma mansoni
/
Leukocytes, Mononuclear
/
Cytokines
/
Leishmaniasis, Cutaneous
/
Antigens, Protozoan
Limits:
Animals
/
Female
/
Humans
/
Male
Language:
English
Journal:
Mem. Inst. Oswaldo Cruz
Journal subject:
Tropical Medicine
/
Parasitology
Year:
2011
Type:
Article
Affiliation country:
Brazil
/
United kingdom
Institution/Affiliation country:
Universidade Federal da Bahia/BR
/
Universidade Federal de Minas Gerais/BR
/
University of Edinburgh/GB
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