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Vaccines-2013 - OMICS Group

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Carina S. Pinheiro et al., J <strong>Vaccines</strong> Vaccin <strong>2013</strong>, 4:5http://dx.doi.org/10.4172/2157-7560.S1.0183 rd International Conference on<strong>Vaccines</strong> & VaccinationJuly 29-31, <strong>2013</strong> Embassy Suites Las Vegas, NV, USAVaccination with enzymatically cleaved GPI-anchored proteins from schistosoma mansoniinduces protection against challenge infectionCarina S. Pinheiro 1,2 , Vicente P. Martins 1,2,3 , Barbara C. P. Figueiredo 1,2 , Natan R. G. Assis 1,2 , Suellen B. Morais 1,2 , Marcelo V. Caliari 4 ,Vasco Azevedo 3 , WilliamCastro-Borges 5 , R. AlanWilson 6 and Sergio C. Oliveira 1, 21Departamento de Bioquímica, Imunologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Brazil2Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Brazil3Departamento de Biologia Geral do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Brazil4Departamento de Patologia Geral do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Brazil5Departamento Ciências Biológicas, Universidade Federal de Ouro Preto, Brazil6Centre for Immunology & Infection, Department of Biology, University of York, UKThe flatworm Schistosoma mansoni is a blood fluke parasite that causes schistosomiasis, a debilitating disease that occursthroughout the developing world. Current schistosomiasis control strategies are mainly based on chemotherapy, but manyresearchers believe that the best long-term strategy to control schistosomiasis is through immunization with an antischistosomiasisvaccine combined with drug treatment. In the search for potential vaccine candidates, numerous tegument antigens have beenassessed. As the major interface between parasite and mammalian host, the tegument plays crucial roles in the establishmentand further course of schistosomiasis. Herein, we evaluated the potential of a GPI fraction, containing representative moleculeslocated on the outer surface of adult worms, as vaccine candidate. Immunization of mice with GPI-anchored proteins induceda mixed Th1/Th2 type of immune response with production of IFN-γ and TNF-α, and low levels of IL-5 into the supernatant ofsplenocyte cultures. The protection engendered by this vaccination protocol was confirmed by 42% reduction in worm burden,45% reduction in eggs per gram of hepatic tissue, 29% reduction in the number of granulomas per area, and 53% reduction inthe granuloma fibrosis. Taken together, the data herein support the potential of surface-exposed GPI-anchored antigens from theS.mansoni tegument as vaccine candidate.carinaspinheiro@yahoo.com.brJ <strong>Vaccines</strong> Vaccin <strong>2013</strong>ISSN: 2157-7560, JVV an open access journal<strong>Vaccines</strong>-<strong>2013</strong>July 29-31, <strong>2013</strong>Volume 4 Issue 5Page 144

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