Malaria vaccine efficacy: overcoming the helminth hurdle

Expert Review of Vaccines
Julio Vladimir Cruz-ChanEric Dumonteil

Abstract

Several studies have documented that helminth infections can interfere with the development of the immune response of vaccines against different diseases, although some results have been contradictory. The mechanisms involved in the inhibition of the immune response to vaccination by helminth are still unclear, and murine models of helminth-malaria coinfections have proven helpful in investigating some aspects of the interactions involved. The study evaluated here focuses on the effect of helminth infection in mice on the immunogenicity and protective efficacy of two distinct malaria vaccine candidates, a transmission-blocking DNA vaccine based on Pfs25 antigen and a pre-erythrocytic vaccine based on irradiated sporozoites. Interestingly, the authors found that helminth infection dramatically reduced DNA vaccine immunogenicity, while immunization with irradiated sporozoites was able to induce a high level of antibodies and protection, independently of helminth infection. Immune suppression by helminth infection affected all IgG isotypes, suggesting no particular polarization of the immune response, but the generation of memory B cells was not affected. It will be of key interest to understand the mechanisms underlying the effic...Continue Reading

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Citations

Apr 20, 2014·Current Treatment Options in Neurology·Jorge Correale
Nov 29, 2011·Trends in Parasitology·Miles B Markus
Mar 5, 2011·Multiple Sclerosis : Clinical and Laboratory Research·J O FlemingZ Fabry
Jan 28, 2015·The American Journal of Tropical Medicine and Hygiene·Akinwale Michael EfunshileBrigitte König

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