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TOWARDS DEVELOPMENT OF NOVEL IMMUNIZATION STRATEGIES AGAINST LEISHMANIASIS USING PLGA NANOPARTICLES LOADED WITH KINETOPLASTID MEMBRANE PROTEIN-II
dx.doi.org/10.2147/IJN.S30093
Author
Affilliation
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Universidad Autonoma de Madrid. Departamento de Biologia Molecular. Centro de Biología Molecular Severo Ochoa. Madrid, Espanha
Departamento de Farmacia y Tecnología Farmacéutica / Universidad de Navarra. Facultad de Farmacia. Instituto de Salud Tropical. Pamplona, Spain
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil
Universidad Autonoma de Madrid. Departamento de Biologia Molecular. Centro de Biología Molecular Severo Ochoa. Madrid, Espanha
Departamento de Farmacia y Tecnología Farmacéutica / Universidad de Navarra. Facultad de Farmacia. Instituto de Salud Tropical. Pamplona, Spain
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Fundação Oswaldo Cruz. Centro de Pesquisa Gonçalo Moniz. Salvador, BA, Brasil / Instituto de Investigação em Imunologia. Salvador, BA, Brasil
Abstract
Vaccine development has been a priority in the fight against leishmaniases, which
are vector-borne diseases caused by Leishmania protozoa. Among the different immunization
strategies employed to date is inoculation of plasmid DNA coding for parasite antigens,
which has a demonstrated ability to induce humoral and cellular immune responses. In this
sense, inoculation of plasmid DNA encoding Leishmania kinetoplasmid membrane protein-11
(KMP-11) was able to confer protection against visceral leishmaniasis. However, recently the
use of antigen delivery systems such as poly(lactic-co-glycolic acid) (PLGA) nanoparticles has
also proven effective for eliciting protective immune responses.
Methods: In the present work, we tested two immunization strategies with the goal of obtaining
protection, in terms of lesion development and parasite load, against cutaneous leishmaniasis
caused by L. braziliensis. One strategy involved immunization with plasmid DNA encoding
L. infantum chagasi KMP-11. Alternatively, mice were primed with PLGA nanoparticles
loaded with the recombinant plasmid DNA and boosted using PLGA nanoparticles loaded
with recombinant KMP-11.
Results: Both immunization strategies elicited detectable cellular immune responses with
the presence of both proinflammatory and anti-inflammatory cytokines; mice receiving the
recombinant
PLGA nanoparticle formulations also demonstrated anti-KMP-11 IgG1 and
IgG2a. Mice were then challenged with L. braziliensis, in the presence of sand fly saliva.
Lesion development
was not inhibited following either immunization strategy. However,
immunization with PLGA nanoparticles resulted in a more prominent reduction in parasite load
at the infection site when compared with immunization using plasmid DNA alone. This effect
was associated with a local increase in interferon-gamma and in tumor necrosis factor-alpha.
Both immunization strategies also resulted in a lower parasite load in the draining lymph nodes,
albeit not significantly.
Conclusion: Our results encourage the pursuit of immunization strategies employing
nanobased
delivery systems for vaccine development against cutaneous leishmaniasis caused
by L. braziliensis
infection.
Publisher
Dove Press
Citation
SANTOS, D. M. et al. Towards development of novel immunization strategies against leishmaniasis using PLGA nanoparticles loaded with kinetoplastid membrane protein-II. International Journal of Nanomedicine, v. 7, p. 2115-2127, 2012.ISSN
1176-9114dx.doi.org/10.2147/IJN.S30093
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