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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2013.tde-07062014-124431
Document
Author
Full name
Lidiane Zito Grund
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2013
Supervisor
Committee
Silva, Carla Lima da (President)
Casa, Maisa Splendore Della
Ferreira, Mônica Valdyrce dos Anjos Lopes
Ibañez, Olga Célia Martinez
Popi, Ana Flavia
Title in Portuguese
Influência das células T na diferenciação e manutenção de células B de memória produtoras de anticorpos de longa vida (ASC) induzidas na resposta imune crônica ao veneno de Thalassophrryne nattereri.
Keywords in Portuguese
Citocinas
Linfócitos B
Linfócitos T
Peixes
Venenos de origem animal
Abstract in Portuguese
O veneno do peixe peçonhento Thalassophryne nattereri induz a formação de uma resposta imune protetora de longa duração caracterizada por células B produtoras de anticorpos de memória (Bmem) e de longa vida (ASC antibody secreting cells). A partir de uma combinação de abordagens in vivo e in vitro investigamos a participação dos linfócitos T de memória e moléculas sinalizadoras CD4 e CD28 sobre a diferenciação e manutenção das ASC e analisamos a relação hierárquica entre os 2 tipos de células B de memória. Demonstramos que as ASC requerem mediante a sua localização (tecido inflamado, baço ou medula óssea) ou a expressão de B220 a integração de diferentes sinais cognatos (BCR, linfócitos TcM e TeM e a sinalização CD4 ou CD28) ou solúveis (IL-17A e IL-23) para a sobrevivência e a amplificação da produção de anticorpos de memória.
Title in English
Influence of T cell on differentiation and maintenance of long-lived antibody-secreting cells (ASC) induced during chronic immune response to Thalassophryne nattereri venon.
Keywords in English
B lymphocytes
Cytokines
Fish
Poisons of animal origin
T lymphocytes
Abstract in English
Thalassophryne nattereri fish venom induces the formation of a protective immune response characterized by memory B cells (Bmem) and the long-lived antibody-secreting cells (ASC). From a combined in vivo and in vitro approaches, we investigated the participation of memory T lymphocytes and CD4 or CD28 signaling molecules on the differentiation and maintenance of ASC survival and analyzed the hierarchical relationship between the two types of memory B cells. We demonstrated that ASC require dependent by localization (inflamed tissue, spleen or bone marrow) or B220 expression the integration of different cognate signals (BCR, TcM and TeM lymphocytes, CD4 or CD28 signaling) or soluble (IL-17A and IL-23) to survival and amplification of the memory antibodies production.
 
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Publishing Date
2014-06-11
 
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