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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2016.tde-06092016-154205
Document
Author
Full name
Rodrigo Xavier das Neves
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Seelaender, Marilia Cerqueira Leite (President)
Batista Junior, Miguel Luiz
Câmara, Niels Olsen Saraiva
Nascimento, Claudia Maria da Penha Oller do
Waitzberg, Dan Linetzky
Title in Portuguese
Inflamação e alteração metabólica na caquexia: papel dos adipócitos, do fígado e da modulação oferecida pela microbiota intestinal.
Keywords in Portuguese
Caquexia
Inflamação
Inflamassoma
Microbiota
Tecido adiposo branco
Abstract in Portuguese
Objetivo do estudo foi estudar a participação dos adipócitos e do fígado na inflamação e o papel da microbiota ao longo da progressão da caquexia. Para verificar o comportamento dos adipócitos e do fígado utilizamos ratos Wistar macho de 8 semanas, divididos em dois grupos: i) controle; ii) tumor. Este último foi subdividido em 2 grupos: a) 7º. e b) 14º. dia após a inoculação das células tumorais. Para avaliar o comportamento da microbiota durante o quadro de caquexia utilizamos camundongos C57Bl/6 convencional e germ free de 8-10 semanas, divididos em quatro grupos: i) Convencional controle; ii) Germ Free controle; iii) Convencional tumor; iv) Germ Free tumor. A célula tumoral usada para esse modelo foi Lewis Lung Carcinoma. Adipócitos isolados dos TAB, mesentérico, mais o fígado, mostraram que a via do inflamassoma esta ativa na fase terminal da caquexia. No modelo Germ Free, observamos que a caquexia apresenta-se é acelerada no tecido adiposo epididimal comparado aos camundongos convencionais tumor. Em conclusão, os adipócitos e o fígado desempenha papel importante no estabelecimento da inflamação, enquanto que a simbiose da microbiota parece ser essencial para combater a redução do tecido adiposo.
Title in English
Cancer cachexia inflammation and metabolic: contribution of adipocyte, of the liver and modulation by intestinal microbiota.
Keywords in English
Cachexia
Inflammasome
Inflammation
Microbiota
White adipose tissue
Abstract in English
The goal of this study the role of adipocytes and liver inflammation and the role of microbiota along the progression of cachexia. The main aspects evaluated were increased of the inflammation, alteration in both pathways NF-kB and the inflammasome, and importance of the microbiota during progression of cachexia. To verify the behavior of adipocytes and liver I used Eight weeks-old male rats, I divided into two main groups: i) control; ii) tumor. The latter was divided into 2 groups: a) 7º. and b) 14º. day after tumor cell. To assess the microbial behavior during the development of cachexia I used C57BL/6 conventional mice and Germ Free 8-10 weeks, they were divided into four groups: i) Conventional control; ii) Germ Free control; iii) Conventional tumor; iv) Germ Free tumor. The tumor cell used in this model was Lewis Lung Carcinoma. Adipocytes isolated from TAB, mesenteric further the liver, showed that the inflammasome pathway is active in the terminal phase of cachexia. In model of Germ free mice we observed that cachexia is accelerated in epididymal adipose tissue compared to conventional tumor. In conclusion, adipocytes and liver seem to play a relevant role in the establishment of inflammation, while the microbial symbiosis seems to be essential for combating the reduction of adipose tissue.
 
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Publishing Date
2016-09-06
 
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