Journal
PLOS ONE
Volume 5, Issue 9, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0012764
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Funding
- French Ministry of Education and Scientific Research [02MENRT00123]
- Conseil Regional Nord-Pas de Calais (France) [04170049]
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Background: Malaria and schistosomiasis coinfection frequently occurs in tropical countries. This study evaluates the influence of Schistosoma haematobium infection on specific antibody responses and cytokine production to recombinant merozoite surface protein-1-19 (MSP1-(19)) and schizont extract of Plasmodium falciparum in malaria-infected children. Methodology: Specific IgG1 to MSP1-(19), as well as IgG1 and IgG3 to schizont extract were significantly increased in coinfected children compared to P. falciparum mono-infected children. Stimulation with MSP1-(19) lead to a specific production of both interleukin-10 (IL-10) and interferon-gamma (IFN-gamma), whereas the stimulation with schizont extract produced an IL-10 response only in the coinfected group. Conclusions: Our study suggests that schistosomiasis coinfection favours anti-malarial protective antibody responses, which could be associated with the regulation of IL-10 and IFN-gamma production and seems to be antigen-dependent. This study demonstrates the importance of infectious status of the population in the evaluation of acquired immunity against malaria and highlights the consequences of a multiple infection environment during clinical trials of anti-malaria vaccine candidates.
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