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HisAK70: Progress towards a vaccine against different forms of leishmaniosis

AuthorsDomínguez-Bernal, Gustavo; Horcajo, Pilar; Orden, José A.; Ruiz-Santa-Quiteria, José A.; Fuente, Ricardo de la; Ordóñez-Gutiérrez, Lara ; Martínez-Rodrigo, Abel; Mas, Alicia; Carrión, Javier
Leishmania major
Leishmania infantum
Issue Date2015
PublisherBioMed Central
CitationParasites and Vectors 8 (2015)
AbstractBackground: Leishmania major and Leishmania infantum are among the main species that are responsible for cutaneous leishmaniosis (CL) and visceral leishmaniosis (VL), respectively. The leishmanioses represent the second-largest parasitic killer in the world after malaria. Recently, we succeeded in generating a plasmid DNA (pCMV-HISA70m2A) and demonstrated that immunized mice were protected against L. major challenge. The efficacy of the DNA-vaccine was further enhanced by the inclusion of KMP-11 antigen into the antibiotic-free plasmid pVAX1-asd. Methods: Here, we describe the use of a HisAK70 DNA-vaccine encoding seven Leishmania genes (H2A, H2B, H3, H4, A2, KMP11 and HSP70) for vaccination of mice to assess the induction of a resistant phenotype against VL and CL. Results: HisAK70 was successful in vaccinated mice, resulting in a high amount of efficient sterile hepatic granulomas associated with a hepatic parasite burden fully resolved in the VL model; and resulting in 100 % inhibition of parasite visceralization in the CL model. Conclusions: The results suggest that immunization with the HisAK70 DNA-vaccine may provide a rapid, suitable, and efficient vaccination strategy to confer cross-protective immunity against VL and CL.
Identifiersdoi: 10.1186/s13071-015-1246-y
issn: 1756-3305
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