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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avaliação da diferença da resposta imune em camundongos neonatos utilizando antígenos de membrana externa de Neisseria  meningitidis B complexados com dois diferentes adjuvantes. / Evaluation of difference immune response in neonatal mice using outer membrane vesicles of Neisseria meningitidis B complexed with two different adjuvants.

Santos, Fernanda Ayane de Oliveira 12 September 2017 (has links)
Os adjuvantes são moléculas, compostos ou complexos macromoleculares que aumentam a potência e a longevidade da resposta imune específica aos antígenos. A sua adição na preparação vacinal aumenta, sustenta e dirige a imunogenicidade de antígenos, modulando de forma eficaz respostas imunes apropriadas, reduzindo a quantidade de antígeno ou número de imunizações necessárias e melhorando a eficácia de vacinas em recém-nascidos, idosos ou indivíduos imunocomprometidos. O objetivo desse estudo foi avaliar a imunogenicidade das preparações antigênicas baseadas em OMVs de Neisseria meningitidis B complexados com dois diferentes adjuvantes, o lípide catiônico brometo de dioctadecildimetilamônio (DODAB-BF) e hidróxido de alumínio (HA) utilizando a via intranasal e a via subcutânea em camundongos neonatos Swiss aplicando o sistema heterólogo prime-booster. Como métodos de estudo foram utilizadas as técnicas universais imunológicas como: Immunoblot, DOT-ELISA, ELISA e ELISpot visando à avaliação da resposta imunológica humoral e celular de camundongos machos e fêmeas. Na análise por Immunoblot avaliou-se a especificidade dos anticorpos com a cepa homóloga e com as bactérias íntegras de N. meningitidis da cepa B:4:P1.19,15. Por DOT-ELISA verificou-se a reatividade cruzada com DODAB-BF para diferentes sorogrupos (B, C, W e Y) e o mesmo não foi observado com HA. Por ELISA foram quantificados e comparados os títulos de anticorpos nos soros pool dos camundongos imunizados com DODAB-BF+OMVs e HA+OMVs para IgG, IgG1 e IgG2a as vias de imunização utilizadas exibiram títulos de IgG. E ambos adjuvantes promoveram a produção de IgG1 e IgG2a variando de acordo com a via de imunização utilizada. Por ELISpot foram analisadas as citocinas IFN-γ e IL-4 e os resultados demonstraram uma resposta direcionada para o perfil Th1 e Th2. / Adjuvants are molecules, compounds or macromolecular complexes that increase the power and longevity of the specific immune response to antigens.Their addition in the vaccine preparation increases, sustains and directs immunogenicity of antigens, effectively modulating appropriate immune responses, reducing the amount of antigen or number of immunizations required, and improving the efficacy of vaccines in infants, the elderly, or immunocompromised patients.The aim of this study was to evaluate the immunogenicity of antigenic from OMVs of N. meningitidis B complexed with two different adjuvants: DODAB-BF and aluminium hydroxide (HA) comparing the evaluation of subcutaneous and intranasal route of immunization for the first time using the prime-boost system in outbred neonatal mice. As universal methods of antibody detection were used: Immunoblot, DOT-ELISA, ELISA and ELISpot aiming for the humoral and cellular immune response and of male and female mice. By Immunoblot analysis the specificity of antibodies with the homologous strain N. meningitidis B:4:P1.19.15. By DOT-ELISA was verified the cross-reactivity with DODAB-BF to different sorogroups (B, C, W and Y) that was not observed with HA. By ELISA the antibodies titers were quantified and compared in the sera of mice immunized with DODAB-BF+OMVs and HA+OMVs for IgG, IgG1 and IgG2a. The immunization routes used exhibited IgG titers, and both adjuvants promoted the production of IgG1 and IgG2a varying according to the route of immunization used. By ELISpot was analyze IFN-γ- and IL-4 and the results showed the response directly to Th1 and Th2 profile.
2

Estudo da imunogenicidade da proteína de classe 3 (PorB) purificada da membrana externa de Neisseria miningitidis: imunização intranasal/intramuscular em camundongos adultos e neonatos utilizando Bordetella pertussis como adjuvante. / Study of the immunogenecity of the class 3 proteins (PorB) purified from the outer mebrane of Neisseria meningitidis: intranasal and intramuscular immunization in adult and neonate mice using Bordetella pertussis as adjuvant.

Raphael, Mariana Lopes Teixeira 28 March 2008 (has links)
As proteínas de classe 3 são candidatas na preparação de uma vacina contra a doença meningocócica. O objetivo deste estudo é determinar a imunogenicidade da proteína de classe 3 purificada da cepa de Neisseria meningitidis do sorogrupo B juntamente com a capacidade adjuvante de whole cells de Bordetella pertussis. Foram imunizados camundongos BALB/c neonatos em um intervalo de 3 a 12 dias entre 1 e 4 doses da proteína de classe 3 mais adjuvante, pela via intranasal e no 21º dia pela via intramuscular com a proteína de classe 3 emulsificada com hidróxido de alumínio. Os resultados demonstraram que após 2 doses pela via intranasal e 1 dose pela via intramuscular houve rápido estímulo das células imunes nos camundongos adultos BALB/c e neonatos BALB/c e outbred. Todos os soros foram analisados por ELISA e immunoblot. O adjuvante B. pertussis administrado pelas vias intranasal ou intramuscular, aumentou a resposta imune comparada com os controles. Anticorpos bactericidas e de alta afinidade foram produzidos. / Proteins of class 3 sound candidates in the preparation of vaccine against meningococcal illness. The aim of this study was to determine the immunogenicity of class 3 proteins purified of Neisseria meningitidis of the serogroup B along with whole cells of Bordetella pertussis as adjuvant. BALB/c and outbred neonate mice between 3 and 12 days old were immunized with 1 to 4 doses of the purified class 3 proteins with or without adjuvant given by the intranasal route, and on the 21st day the animals received an intramuscular dose of the class 3 proteins with or without aluminum hydroxide. The results demonstrated that after 2 doses by the intranasal route and 1 dose intramuscular there was a rapid stimulation of the immune cells in BALB/c adult mice as well as BALB/c and outbred neonates mice. All sera were analyzed by ELISA and immunoblot. The adjuvant B. pertussis used in the present investigation and given via the intranasal or intramuscular route increased the immune response compared with the controls. High affinity and bactericidal antibodies were produced.
3

Estudo da imunogenicidade da proteína de classe 3 (PorB) purificada da membrana externa de Neisseria miningitidis: imunização intranasal/intramuscular em camundongos adultos e neonatos utilizando Bordetella pertussis como adjuvante. / Study of the immunogenecity of the class 3 proteins (PorB) purified from the outer mebrane of Neisseria meningitidis: intranasal and intramuscular immunization in adult and neonate mice using Bordetella pertussis as adjuvant.

Mariana Lopes Teixeira Raphael 28 March 2008 (has links)
As proteínas de classe 3 são candidatas na preparação de uma vacina contra a doença meningocócica. O objetivo deste estudo é determinar a imunogenicidade da proteína de classe 3 purificada da cepa de Neisseria meningitidis do sorogrupo B juntamente com a capacidade adjuvante de whole cells de Bordetella pertussis. Foram imunizados camundongos BALB/c neonatos em um intervalo de 3 a 12 dias entre 1 e 4 doses da proteína de classe 3 mais adjuvante, pela via intranasal e no 21º dia pela via intramuscular com a proteína de classe 3 emulsificada com hidróxido de alumínio. Os resultados demonstraram que após 2 doses pela via intranasal e 1 dose pela via intramuscular houve rápido estímulo das células imunes nos camundongos adultos BALB/c e neonatos BALB/c e outbred. Todos os soros foram analisados por ELISA e immunoblot. O adjuvante B. pertussis administrado pelas vias intranasal ou intramuscular, aumentou a resposta imune comparada com os controles. Anticorpos bactericidas e de alta afinidade foram produzidos. / Proteins of class 3 sound candidates in the preparation of vaccine against meningococcal illness. The aim of this study was to determine the immunogenicity of class 3 proteins purified of Neisseria meningitidis of the serogroup B along with whole cells of Bordetella pertussis as adjuvant. BALB/c and outbred neonate mice between 3 and 12 days old were immunized with 1 to 4 doses of the purified class 3 proteins with or without adjuvant given by the intranasal route, and on the 21st day the animals received an intramuscular dose of the class 3 proteins with or without aluminum hydroxide. The results demonstrated that after 2 doses by the intranasal route and 1 dose intramuscular there was a rapid stimulation of the immune cells in BALB/c adult mice as well as BALB/c and outbred neonates mice. All sera were analyzed by ELISA and immunoblot. The adjuvant B. pertussis used in the present investigation and given via the intranasal or intramuscular route increased the immune response compared with the controls. High affinity and bactericidal antibodies were produced.

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