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Master's Dissertation
DOI
https://doi.org/10.11606/D.41.2023.tde-21072023-152322
Document
Author
Full name
Thiago Giove Mitsugi
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2023
Supervisor
Committee
Okamoto, Oswaldo Keith (President)
Barbuto, Jose Alexandre Marzagao
Paiva, Raquel de Melo Alves
Title in Portuguese
Desenvolvimento de receptor quimérico de antígeno tumoral com aplicação no tratamento de glioblastoma
Keywords in Portuguese
CAR-T
Células-tronco tumorais
Glioblastoma
Imunoterapia
Abstract in Portuguese
Gliomas são os tumores de Sistema Nervoso Central (SNC) mais comuns em todo o mundo, compreendendo até 80% dos tumores encefálicos primários malignos. Dentre os tipos de gliomas destacam-se os Glioblastomas Multiforme (GBM), como mais agressivos e frequentes. As terapias atualmente disponíveis para o tratamento de glioblastomas são insuficientes, consistindo de intervenção cirúrgica e quimio/radioterapia que, contudo, resultam em sobrevida média inferior a 2 anos destes pacientes. A resistência à quimio/radioterapia, bem como a capacidade dos glioblastomas de recidivar são atribuídas à presença de células-tronco tumorais (CTT) nestes tumores. Diversas estratégias visam para alvejar as CTTs , com base nas suas particularidades fisiológicas e moleculares. A imunoterapia tem se destacado com estudos sobre receptores quiméricos do tipo CAR, com recente aprovação de 6 terapias utilizando células CAR-T pelo FDA nos EUA, até o começo de 2023. O sucesso da terapia com células CAR-T depende extensamente do desenho dos receptores quiméricos e especialmente do alvo tumoral designado. Nesse sentido, o presente estudo visa explorar o potencial terapêutico de receptores do tipo CAR capazes de reconhecer antígenos superexpressos em células-tronco tumorais de gliomas. Estes antígenos são utilizados como marcadores de CTT, e a sua expressão está relacionada com maior agressividade in vitro e in vivo, ressaltando a sua relevância como alvo tumoral . Desenharemos um receptor quimérico do tipo CAR, o qual será expresso em uma linhagem de linfócitos T. Avaliaremos a capacidade dessas células CAR-T em reconhecer especificamente e exercer atividade anti-tumoral contra células-tronco tumorais de gliomas.
Title in English
Role of the Saccharomyces cerevisiae antioxidant protein Ahp1 in the cellular response against oxidative stress
Keywords in English
Cancer stem cells
CAR-T cells
Glioblastoma
Immunotherapy
Abstract in English
Gliomas are the most common Central nervous system (CNS) tumors around the globe, they represent up to 80% of all malignant brain tumors. Between the types of gliomas, glioblastomas multiforme (GBM) stand out as the most frequent and aggressive tumors. Currently available therapies for glioblastoma treatment are insufficient, relying on medical intervention and chemo/radiotherapy, which result in a mean overall survival of less than 2 years for these patients. The resistance to chemo/radiotherapy, as well as the ability of glioblastomas to relapse, are frequently attributed to the presence of cancer stem cells (CSC) in these tumors. Various therapies aim to specifically target glioma stem cells (GSC), based on its molecular and physiologic peculiarities. Immunotherapy has emerged as a promising approach to oncology with the studies using chimeric antigen receptors (CAR), which led to the approval of 6 CAR-T cell based therapies by the US FDA and the European Commission (EC) as of early 2023.The success in CAR-T cell therapy extensively relies on the design of the antigen receptors, and a appropriate designation of the tumoral target. In that sense the present study aims to explore the therapeutic potential of a CAR capable of specifically recognizing a tumoral antigen overexpressed in GSCs. These antigens have been used as GSC markers and it´s expression on these cells have been correlated with aggressiveness both in vivo and in vitro, highlighting its potential as a tumoral antigen. We designed a CAR that will be expressed on a T lymphocyte cell line, and we are going to evaluate the capability of these CAR-T cells to specifically target GSCs.
 
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Thiago_Mitsugi_SIMPL.pdf (160.72 Kbytes)
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Release Date
2025-05-19
Publishing Date
2023-07-21
 
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