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Master's Dissertation
DOI
https://doi.org/10.11606/D.5.2014.tde-26082014-091536
Document
Author
Full name
Aline Alves de Lima Silva
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Pagliari, Carla (President)
Criado, Paulo Ricardo
Fernandes, Elaine Raniero
Title in Portuguese
Resposta imune in situ na cromoblastomicose humana: participação de células T reguladoras e expressão de citocinas de perfil Th17
Keywords in Portuguese
Biópsia
Células T reguladoras
Células Th17
Citocinas
Cromoblastomicose
Imunohistoquímica
Pele/lesões
Abstract in Portuguese
A cromoblastomicose é uma infecção fúngica crônica que acomete pele e tecido subcutâneo. As lesões podem ser classificadas em tumoral, verrucosa, cicatricial e do tipo placa. A resposta imune é principalmente celular e a forma grave da doença correlaciona-se com citocinas de perfil Th2. Nós exploramos populações celulares do tipo T reguladoras e Th17. Foram utilizadas vinte e três biópsias da forma verrucosa obtidas de pacientes com diagnóstico clínico e histopatológico de cromoblastomicose, sem tratamento. Foi realizado o método de imunohistoquímica para detectar Foxp3, CD25, TGF-beta, IL-6, IL-17 e IL-23. A IL-17 predominou sobre os outros marcadores, embora haja número regular de Foxp3. TGF-beta, IL-6 e IL-23 raramente foram visualizados. A constituição de uma resposta imune local com alta expressão de IL-17 e baixa expressão de outras citocinas pode ser, ao menos em parte, uma tentativa de ajudar o sistema imunológico contra infecções fúngicas. Células Foxp3 poderiam ser capazes de interferir na resposta imune eficiente contra fungos, mas também beneficiar o hospedeiro, através da capacidade de reduzir os danos do tecido que seguem uma resposta imune local. Esses elementos celulares podem contribuir para a cronicidade que caracteriza esta doença
Title in English
In situ immune response in human chromoblastomycosis: participation of regulatory T cells and cytokines of Th17 profile
Keywords in English
Biopsy
Chromoblastomycosis
Cytokines
Immunohistochemistry
Regulatory T cells
Skin/lesions
Th17 cells
Abstract in English
Chromoblastomycosis is a chronic fungal infection that affects skin and subcutaneous tissue. Lesions can be classified in tumorous, verrucous, cicatricial and plaque type. The immune response is primarily cellular and the severe form of the disease correlates with a Th2 pattern of cytokines. We intended to explore the populations of regulatory T cells and the Th17 pattern. Twenty-three biopsies of verrucous form were obtained from patients with clinical and histopathological diagnostic of chromoblastomycosis, without treatment. It was performed an immunohistochemistry method to detect Foxp3, CD25, TGF-beta, IL-6, IL-17 and IL-23. IL-17 predominated over the other markers in chromoblastomycosis, although there was a regular number of Foxp3. TGF- beta, IL-6 and IL-23 were rarely visualized. The constitution of a local immune response with high expression of IL-17 and low expression of other cytokines could be at least in part, an attempt to help the immune system against fungal infection. Foxp3 cells could be able to interfere with the efficient immune response against fungi, but also benefit the host, through the ability to reduce the tissue damage that follows a local immune response. They could play a role in chronicity that characterizes this disease
 
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Publishing Date
2014-08-26
 
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