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Master's Dissertation
DOI
Document
Author
Full name
Vanessa Garcia Vilas Boas
Institute/School/College
Knowledge Area
Date of Defense
Published
Bauru, 2018
Supervisor
Committee
Campanelli, Ana Paula (President)
Garlet, Ana Paula Favaro Trombone
Pinheiro, Cláudia Ramos
Torres, Sergio Aparecido
Title in Portuguese
IL-33 no carcinoma espinocelular de pele
Keywords in Portuguese
Anti-IL-33
Carcinogênese química
Imunologia tumoral
Interleucina-33
Abstract in Portuguese
IL-33 participa em diversas doenças com funções pró-inflamatórias e protetoras, de acordo com o contexto do microambiente. Com relação a biologia tumoral, o papel de IL-33 ainda é controverso. Estudos demonstraram que IL-33 possui efeitos pró e anti-inflamatórios em diferentes modelos animais de câncer. A presença desta citocina no estroma favorece a imunossupressão pela ativação de células T reguladoras e células mieloides supressoras. IL- 33 pode em outras situações promover a imunogenicidade e a resposta imune antitumoral de tipo 1 através das células T citotóxicas e células Natural Killers. Contudo o efeito preciso de IL-33 em diferentes tipos de câncer permanece incerto. Sendo assim, compreender o papel de IL-33 na imunobiologia do câncer, poderia direcionar esta citocina como um possível alvo em imunoterapias contra o câncer. Considerando, portanto, a pluralidade desta citocina no desenvolvimento de uma resposta imune, no presente estudo buscamos avaliar os efeitos do tratamento com anti-IL-33 em modelo experimental de carcinoma espinocelular de pele em camundongos BALB/c de linhagem selvagem. Ao final dos protocolos de indução e tratamento, a análise histopatológica revelou que o tratamento com anti-IL-33 levou a menor incidência de carcinoma espinocelular in situ e diminuição das atipias celulares e, consequentemente, do grau de displasia. O tratamento com anti-IL-33 levou a aumento nos percentuais de células B e diminuição nas percentagens de linfócitos T CD4+, células dendríticas, células TREG e macrófagos isolados do microambiente tumoral. Ademais, o tratamento com anti-IL-33 levou a aumento na percentagem de linfócitos T CD4+ produtores de IFN- e menor percentagem de linfócitos T CD4+ e CD8+ produtores de IL-4 nos linfonodos. Em camundongos submetidos ao tratamento, observou-se menor produção de TGF- no microambiente tumoral, sem interferir de modo significativo com a produção de IFN-, IL-4, IL-10 e IL-17. Os nossos resultados indicam que o tratamento com anti-IL-33 poderia ser alvo de novos estudos em busca de estratégias terapêuticas para o carcinoma espinocelular de pele.
Title in English
IL-33 in squamous cell carcinoma
Keywords in English
Anti-IL-33 treatment
Chemical carcinogenesis
Interleukin-33
Tumor immunology
Abstract in English
IL-33 participates in several diseases with pro-inflammatory and protective functions, according to the context of the microenvironment. Related to tumor biology, the role of IL-33 is still controversial. Studies have shown that IL-33 has pro and anti-inflammatory effects in different animal models of cancer. Its presence in the stromal and tumor serum increases the immunosuppression by the activation of regulatory T cells and myeloid-derived suppressor cells. On the other hand, the intracellular form in tumor cells promotes immunogenicity and the antitumor type 1 immune response through cytotoxic T cells and natural killer cells. However, the precise effect of IL-33 on cancer conditions remains uncertain. Thus, understanding its role in the immunobiology of cancer could target this cytokine as a marker in cancer immunotherapies. Considering, the range of IL-33 in the development of an immune response, this study aims to evaluate the effects of the anti-IL-33 treatment on wild type BALB/c mouse squamous cell carcinoma (SSCC) development. Histopathological analysis revealed that anti-IL-33 treatment decreased the dysplasia. In addition, anti-IL-33 treatment showed an increasing percentage of B cells and reduced the percentage of CD4+ T lymphocytes, dendritic cells, TREG cells and macrophages in the tumor microenvironment. In the lymph node, anti-IL-33 treatment induced a shift towards the TH1 type cytokine profile and reduced the percentage of IL-4 expressing CD4+ and CD8+ cells. Additionally, anti-IL-33 treatment showed a reduced TGF- production in the tumor microenvironment, but with no changes to the IFN-, IL-4, IL-10 e IL-17 production. Taken together these results indicate that anti-IL-33 treatment could be the subject of further studies of therapeutic strategies for squamous cell carcinoma of the skin.
 
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Release Date
2021-05-14
Publishing Date
2019-05-22
 
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