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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2009.tde-09022010-114250
Document
Author
Full name
Lidiane Zito Grund
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Ferreira, Mônica Valdyrce dos Anjos Lopes (President)
Barros, Myrthes Anna Maragna Toledo
Sato, Maria Notomi
Title in Portuguese
Papel das citocinas IL-5 e IL-17A na diferenciação de células produtoras de anticorpos de vida longa (ASC) induzida pelo veneno do peixe Thalassophryne nattereri
Keywords in Portuguese
Anticorpos de alta afinidade
Célula B1a
Citocinas IL-5 e IL-17A
Memória imunológica
Plasmócito de vida longa (ASC)
Veneno de peixe
Abstract in Portuguese
O veneno do T.nattereri induz uma resposta de memória com a diferenciação de células B B220neg, indicativo de células produtoras de anticorpos de vida longa (ASC). Para avaliar o efeito do veneno na diferenciação de ASCs, camundongos BALB/c foram imunizados e sacrificados nos dias 21, 28, 48, 74 e 120 para avaliação de anticorpos plasmáticos e células B no peritônio, baço e medula óssea. O veneno induziu intensa esplenomegalia, formação de centros germinativos e persistentes níveis de anticorpos específicos IgG1, IgG2a e IgE anafilática. Células B1a e ASC apareceram rapidamente e a população de ASC CD138pos foi dividida em três subtipos (B220highCD43high, B220lowCD43low, e B220negCD43high) que persistiram em diferentes níveis em todos compartimentos. Finalmente, por métodos de neutralização nós sugerimos um papel importante da IL-5 e IL-17 A no desenvolvimento de ASC B220neg e na população B1a e mais ainda, a produção de TNF-a, IL-1b, IL-6, KC bem como a retenção do veneno nas células dendríticas foliculares parece promover os mecanismos para manutenção das ASCs.
Title in English
The role of IL-5 and IL-17A in the differentiation of long-lived antibody secreting cells (ASC) induced by Thalassophryne nattereri fish venom
Keywords in English
Bia cells
Fish venom
High-affinity antibodies
IL-5 and IL-17A cytokines
Immunological memory
Long-lived antibodies secreting cells (ASC)
Abstract in English
T. nattereri fish venom induces a memory immune response with the differentiation of B cells B220neg, an indicative of long-lived antibody-secreting cells - ASC. To assess the effect of the venom on differentiation of ASCs, BALB/c mice were immunized with venom and sacrificed at days 21, 28, 48, 74 and 120 to evaluate plasmatic antibodies and B cell subtypes in peritoneum, spleen and bone marrow. The venom promoted splenomegaly, germinal centers formation and persistent levels of specific antibodies IgG1, IgG2a and anaphylactic IgE. B1a cells and ASC emerged rapidly and CD138pos ASCs can be divided into three subsets (B220high CD43high, B220low CD43low, and B220neg CD43high) that persist at different levels in all compartments. Finally, by neutralization methods we suggested an important role for IL-5 and IL-17A on development of B220neg ASCs and B1a population and moreover the production of TNF-a, IL-1b, IL-6, KC as well as the venom retained in follicular dendritic cells seem to provide mechanisms to explain the maintenance of ASCs.
 
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Publishing Date
2010-03-15
 
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