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Evaluation of immune responses and analysis of the effect of vaccination of the Leishmania major recombinant ribosomal proteins L3 or L5 in two different murine models of cutaneous leishmaniasis

AuthorsRamírez, Laura ; Santos, Diego M.; Souza, Ana P.; Coelho, Eduardo A. F.; Barral, Aldina; Alonso, Carlos ; Escutia, Marta R.; Bonay, Pedro ; Oliveira, Camila I. de; Soto, Manuel
BALB/c mice
Th1/Th2 Immune responses
Recombinant ribosomal proteins
Issue Date2013
CitationVaccine 31: 1312- 1319 (2013)
AbstractFour new antigenic proteins located in Leishmania ribosomes have been characterized: S4, S6, L3 and L5. Recombinant versions of the four ribosomal proteins from Leishmania major were recognized by sera from human and canine patients suffering different clinical forms of leishmaniasis. The prophylactic properties of these proteins were first studied in the experimental model of cutaneous leishmaniasis caused by L. major inoculation into BALB/c mice. The administration of two of them, LmL3 or LmL5 combined with CpG-oligodeoxynucleotides (CpG-ODN) was able to protect BALB/c mice against L. major infection. Vaccinated mice showed smaller lesions and parasite burden compared to mice inoculated with vaccine diluent or vaccine adjuvant. Protection was correlated with an antigen-specific increased production of IFN-γ paralleled by a decrease of the antigen-specific IL-10 mediated response in protected mice relative to non-protected controls. Further, it was demonstrated that BALB/c mice vaccinated with recombinant LmL3 or LmL5 plus CpG-ODN were also protected against the development of cutaneous lesions following inoculation of L. braziliensis. Together, data presented here indicate that LmL3 or LmL5 ribosomal proteins combined with Th1 inducing adjuvants, may be relevant components of a vaccine against cutaneous leishmaniasis caused by distinct species. © 2013 Elsevier Ltd.
Identifiersdoi: 10.1016/j.vaccine.2012.12.071
issn: 0264-410X
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