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Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
11/03/2020 |
Data da última atualização: |
07/04/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
COELHO, V. T. S.; CHÁVEZ-FUMAGALLI, M. A.; RODRIGUES, F. M.; OLIVEIRA, D. M.; SILVA, J. A. O.; COSTA, L. E.; MENDONÇA, D. V. C.; ARAÚJO, M. N.; FOUREAUX, E. C. M.; MARTINS, V. T.; FIGUEIREDO, J. E. F.; COELHO, E. A. F. |
Afiliação: |
Faculdade de Saúde e Ecologia Humana (FASEH); Faculdade de Saúde e Ecologia Humana (FASEH); Faculdade de Saúde e Ecologia Humana (FASEH); Faculdade de Minas (FAMINAS); Faculdade de Saúde e Ecologia Humana (FASEH); Faculdade de Medicina (UFMG); Faculdade de Minas (FAMINAS); Faculdade de Medicina (UFMG); Faculdade de Medicina (UFMG); JOSE EDSON FONTES FIGUEIREDO, CNPMS; Faculdade de Medicina (UFMG). |
Título: |
Differential protection induced by immunization with variable doses of a Leishmania antigenic extract against Leishmania amazonensis. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Cadernos Técnicos de Saúde, n. 6, p. 8-19, abr. 2019. |
Idioma: |
Inglês |
Conteúdo: |
Experimental vaccines have been developed to protect against leishmaniasis using the BALB/c mice model immunized with different immunogens, but an effective vaccine still does not exist. To determine factors inherent to immunogens that might abrogate vaccine-induced efficacy, our research sought to investigate the impact of immunization using variable doses (low, medium and high) of a known soluble Leishmania antigenic extracts (SLA), associated or not with alum, in order to determine the best dose of this vaccine immunogen able to induce the best level of protection in BALB/c mice against L. amazonensis infection. This work shows that the immunization´ model using a high inoculum (100 µg) of SLA results in the best level of protection against challenge. These mice presented significant reductions in the footpad swelling and parasite load; high levels of IFN-γ and IL-12, and low levels of IL-4, IL-10, TGF-β and Leishmania-specific IgG and IgE antibodies. Mice immunized with 50 µg of SLA present intermediate results of protection; on the other hand, mice immunized with 1 µg showed the worst results. Considering all the elements, it could be concluded that the model employing a high dose of SLA in BALB/c mice can bring about the development of a protective immune response in the animals, thus allowing for the protection against the disease. In addition, we understand that the definition of an ideal dose for each vaccine candidate appears to be fundamental to determining the phenotype of resistance and/or susceptibility in murine models to study leishmaniasis. MenosExperimental vaccines have been developed to protect against leishmaniasis using the BALB/c mice model immunized with different immunogens, but an effective vaccine still does not exist. To determine factors inherent to immunogens that might abrogate vaccine-induced efficacy, our research sought to investigate the impact of immunization using variable doses (low, medium and high) of a known soluble Leishmania antigenic extracts (SLA), associated or not with alum, in order to determine the best dose of this vaccine immunogen able to induce the best level of protection in BALB/c mice against L. amazonensis infection. This work shows that the immunization´ model using a high inoculum (100 µg) of SLA results in the best level of protection against challenge. These mice presented significant reductions in the footpad swelling and parasite load; high levels of IFN-γ and IL-12, and low levels of IL-4, IL-10, TGF-β and Leishmania-specific IgG and IgE antibodies. Mice immunized with 50 µg of SLA present intermediate results of protection; on the other hand, mice immunized with 1 µg showed the worst results. Considering all the elements, it could be concluded that the model employing a high dose of SLA in BALB/c mice can bring about the development of a protective immune response in the animals, thus allowing for the protection against the disease. In addition, we understand that the definition of an ideal dose for each vaccine candidate appears to be fundamental to determin... Mostrar Tudo |
Palavras-Chave: |
Proteção diferencial; Tamanho inóculo. |
Thesagro: |
Vacina. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/211710/1/Differential-protection-1.pdf
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Marc: |
LEADER 02500naa a2200289 a 4500 001 2121134 005 2020-04-07 008 2019 bl uuuu u00u1 u #d 100 1 $aCOELHO, V. T. S. 245 $aDifferential protection induced by immunization with variable doses of a Leishmania antigenic extract against Leishmania amazonensis.$h[electronic resource] 260 $c2019 520 $aExperimental vaccines have been developed to protect against leishmaniasis using the BALB/c mice model immunized with different immunogens, but an effective vaccine still does not exist. To determine factors inherent to immunogens that might abrogate vaccine-induced efficacy, our research sought to investigate the impact of immunization using variable doses (low, medium and high) of a known soluble Leishmania antigenic extracts (SLA), associated or not with alum, in order to determine the best dose of this vaccine immunogen able to induce the best level of protection in BALB/c mice against L. amazonensis infection. This work shows that the immunization´ model using a high inoculum (100 µg) of SLA results in the best level of protection against challenge. These mice presented significant reductions in the footpad swelling and parasite load; high levels of IFN-γ and IL-12, and low levels of IL-4, IL-10, TGF-β and Leishmania-specific IgG and IgE antibodies. Mice immunized with 50 µg of SLA present intermediate results of protection; on the other hand, mice immunized with 1 µg showed the worst results. Considering all the elements, it could be concluded that the model employing a high dose of SLA in BALB/c mice can bring about the development of a protective immune response in the animals, thus allowing for the protection against the disease. In addition, we understand that the definition of an ideal dose for each vaccine candidate appears to be fundamental to determining the phenotype of resistance and/or susceptibility in murine models to study leishmaniasis. 650 $aVacina 653 $aProteção diferencial 653 $aTamanho inóculo 700 1 $aCHÁVEZ-FUMAGALLI, M. A. 700 1 $aRODRIGUES, F. M. 700 1 $aOLIVEIRA, D. M. 700 1 $aSILVA, J. A. O. 700 1 $aCOSTA, L. E. 700 1 $aMENDONÇA, D. V. C. 700 1 $aARAÚJO, M. N. 700 1 $aFOUREAUX, E. C. M. 700 1 $aMARTINS, V. T. 700 1 $aFIGUEIREDO, J. E. F. 700 1 $aCOELHO, E. A. F. 773 $tCadernos Técnicos de Saúde$gn. 6, p. 8-19, abr. 2019.
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Embrapa Milho e Sorgo (CNPMS) |
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Registro Completo
Biblioteca(s): |
Embrapa Hortaliças. |
Data corrente: |
09/12/1999 |
Data da última atualização: |
09/12/1999 |
Autoria: |
ROCHA, H. G. C.; BEZERRA, I. C.; RESENDE, R. O.; RIBEIRO, S. G.; AVILA, A. C. |
Afiliação: |
EMBRAPA-CNPH, Brasilia, DF. |
Título: |
Novel whitefly transmissible geminivirus infecting tomato in the Sao Francisco River Basin. |
Ano de publicação: |
1999 |
Fonte/Imprenta: |
Fitopatologia Brasileira, Brasilia, v.24, p.359, ago. 1999. |
Idioma: |
Inglês |
Notas: |
Resumo. Suplemento. |
Palavras-Chave: |
Brasil; Geminivirus; Mosca-branca; Nordeste; Northeast; Ocorrencia; Pest insects; Survey; Transmissao; Transmission; Vale do Sao francisco; Whitefly. |
Thesagro: |
Inseto; Lycopersicon Esculentum; Praga; Tomate. |
Thesaurus NAL: |
Brazil; occurrence; tomatoes. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01030naa a2200397 a 4500 001 1766681 005 1999-12-09 008 1999 bl uuuu u00u1 u #d 100 1 $aROCHA, H. G. C. 245 $aNovel whitefly transmissible geminivirus infecting tomato in the Sao Francisco River Basin. 260 $c1999 500 $aResumo. Suplemento. 650 $aBrazil 650 $aoccurrence 650 $atomatoes 650 $aInseto 650 $aLycopersicon Esculentum 650 $aPraga 650 $aTomate 653 $aBrasil 653 $aGeminivirus 653 $aMosca-branca 653 $aNordeste 653 $aNortheast 653 $aOcorrencia 653 $aPest insects 653 $aSurvey 653 $aTransmissao 653 $aTransmission 653 $aVale do Sao francisco 653 $aWhitefly 700 1 $aBEZERRA, I. C. 700 1 $aRESENDE, R. O. 700 1 $aRIBEIRO, S. G. 700 1 $aAVILA, A. C. 773 $tFitopatologia Brasileira, Brasilia$gv.24, p.359, ago. 1999.
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