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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2011.tde-20032012-161225
Document
Author
Full name
Bruno Pacola Muniz
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Sato, Maria Notomi (President)
Abrahamsohn, Ises de Almeida
Bortoloto, Ana Elisa Fusaro
Title in Portuguese
Efeito da imunização materna com Ovalbumina na ativação de células dendríticas e geração de linfócitos T reguladores na prole de camundongos.
Keywords in Portuguese
Anticorpos
Camundongos
Células dendríticas
Imunização
Leite
Placenta
Abstract in Portuguese
A predisposição genética associada à predisposição dos neonatos em gerar uma resposta do tipo Th2 ao alérgeno pode favorecer o desenvolvimento de alergia no período neonatal. O presente projeto tem como proposta investigar os mecanismos regulatórios decorrentes da imunização com ovalbumina pré-concepção na resposta IgE da prole. A imunização materna transfere intensamente anticorpos à prole pelas vias placentária e da amamentação. Além disto, a imunização materna é capaz de inibir o desenvolvimento da resposta IgE da prole, aumentar a expressão de CD80 nas células dendríticas (DCs) da prole e manter equilibrado o percentual de células TCD4+CD25+FoxP3+. As DCs da prole co-cultivadas com células T antígeno-específicas induzem células T reguladoras. A imunização materna influencia diretamente no sistema imune do neonato essencialmente por anticorpos que impedem a sensibilização da prole e modulam negativamente a resposta alérgica.
Title in English
Effects of maternal immunization with Ovalbumin in activation of dendritic cells and generation of T regulatory lymphocytes in mice offspring.
Keywords in English
Antibodies
Dendritic cells
Immunization
Mice
Milk
Placenta
Abstract in English
Genetic predisposition in association to the predisposition of neonates to generate a Th2-type response to the allergen can favor the development of allergy in the neonatal period. This project aimed to investigate the regulatory mechanisms in the preconception immunization with ovalbumin in the offspring IgE response. Maternal immunization transferred intensively antibodies to offspring through both placenta and breastfeeding routes. Moreover, maternal immunization is able to inhibit the development of IgE response of the offspring, increase the CD80 expression on dendritic cells (DCs) from offspring and to maintain balanced the percentage of CD4 + CD25 + FoxP3 + T cells. The DCs from offspring co-cultured with antigen-specific T cells induce regulatory T cells. Maternal immunization directly influences the infant's immune system mainly by antibodies preventing the offspring sensitization and negatively modulating the allergic response.
 
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Publishing Date
2012-05-25
 
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