Analysis of iron superoxide dismutase-encoding DNA vaccine on the evolution of the Leishmania amazonensis experimental infection

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Arquivos
art_CAMPOS_Analysis_of_iron_superoxide_dismutaseencoding_DNA_vaccine_on_2015.PDF (1.84 MB)
Citações na Scopus
22
Tipo de produção
article
Data de publicação
2015
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
WILEY-BLACKWELL
Autores
CARVALHO, K. I. L.
Citação
PARASITE IMMUNOLOGY, v.37, n.8, p.407-416, 2015
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
The present work aimed to evaluate the immunogenicity of Leishmania amazonensis iron superoxide dismutase (SOD) -encoding DNA experimental vaccine and the protective properties of this DNA vaccine during infection. The SOD gene was subcloned into the pVAX1 plasmid, and it was used to immunize BALB/c mice. Twenty-one days after the last immunization, mice were sacrificed (immunogenicity studies) or subcutaneously challenged with L. amazonensis (studies of protection), and alterations in cellular and humoral immune responses were evaluated, as well as the course of infection. Mice only immunized with pVAX1-SOD presented increased frequencies of CD4(+) IFN-gamma(+), CD8(+) IFN- gamma(+) and CD8(+) IL-4(+) lymphocytes; moreover, high levels of IgG2a were detected. After challenge, mice that were immunized with pVAX1-SOD had increased frequencies of the CD4(+) IL- 4(+), CD8(+) IFN-gamma(+) and CD8(+) IL-4(+) T lymphocytes. In addition, the lymph node cells produced high amounts of IFN-gamma and IL-4 cytokines. Increased IgG2a was also detected. The pattern of immunity induced by pVAX1-SOD partially protected the BALB/c mice from a challenge with L. amazonensis, as the animals presented reduced parasitism and lesion size when compared to controls. Taken together, these results indicate that leishmanial SOD modulates the lymphocyte response, and that the elevation in IFN-gamma possibly accounted for the decreased skin parasitism observed in immunized animals.
Palavras-chave
DNA vaccine, immunity, Leishmania (Leishmania) amazonensis, superoxide dismutase
URI
https://observatorio.fm.usp.br/handle/OPI/11539
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MCM
Artigos e Materiais de Revistas Científicas - FM/MPT
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - LIM/50
Artigos e Materiais de Revistas Científicas - LIM/60