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| Author(s): |
Taís Nitsch Mazzola
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Ciências Médicas |
| Defense date: | 2007-02-27 |
| Examining board members: |
Maria Marluce dos Santos Vilela;
Maria Heloisa de Souza Lima Blotta;
Luciana Cezar de Cerqueira Leite
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| Advisor: | Marcos Tadeu Nolasco da Silva; Maria Marluce dos Santos Vilela |
| Abstract | |
The objectives of this study were to evaluate cell-mediated immune response to Bacillus Calmette-Guérin (BCG) vaccination in infants vaccinated with combined or separated BCG and Hepatitis B and to compare with BCG-specific response from uninfected infants with vertical exposure to Human Immunodeficiency Virus-1 (HIV-1). BCG-specific proliferation by flow cytometry and IL-10, IL-12, IFN-? and TNF-a concentrations by ELISA were similar in PBMC from infants vaccinated with combined or separated BCG and Hepatitis B. There was CD4+, CD8+ and remarkable ?d+ T cell proliferation in BCG-stimulated cultures. The results suggested that the combined BCG and Hepatitis B vaccine was as immunogenic as BCG vaccine inoculated alone. Exposed HIV-uninfected infants were recruited at Pediatrics Out-Patients Unit of Hospital das Clínicas in UNICAMP and separated into three groups: E1 (aged 6.7-8.8 months), E2 (aged 9.1-17.1) and E3 (aged 18.1-23.4). Unexposed infants (UE, aged 7.0-8.7 months) and E1 matched for age. Proliferation in cell cultures with BCG was significantly reduced in all exposed groups in comparison to UE. Only BCG-stimulated cultures from E3 were similar to UE in relation to CD4+, CD8+ and ?d+ T cell subsets. TNF-a and IL-10 production was not different in BCG-stimulated cultures of unexposed and exposed infants from all groups and there were lower IFN-? concentration in the samples from E1 in comparison to all of the other groups. The results demonstrated a delay in immune system development of HIV-exposed infants (AU) | |