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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2016.tde-12082016-100836
Document
Author
Full name
Joanna Darck Carola Correia Lima
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Seelaender, Marilia Cerqueira Leite (President)
Lopes, Marilene Hohmuth
Silva, Aloisio Souza Felipe da
Title in Portuguese
O papel do infiltrado inflamatório no tumor e sua contribuição para inflamação sistêmica e desenvolimento da caquexia.
Keywords in Portuguese
Caquexia
Inflamação
Microambiente tumoral
Sistema imunológico
Abstract in Portuguese
A caquexia associada ao câncer é caracterizada pela perda de peso severa e um desequilíbrio metabólico.Acredita-se que resulta da interação entre o hospedeiro e tumor que induz a inflamação sistêmica,portanto compreender essa relação é fundamental para a descoberta de marcadores efetivos para diagnóstico.O objetivo do trabalho foi caracterizar diferenças nos infiltrados imunitários do tumor e analisar aspectos moleculares ligados à inflamação,a fim de avaliar se a presença da caquexia é determinada pelo perfil inflamatório do tumor.O estudo envolveu pacientes com câncer colorretal e posteriormente distribuídos em dois grupos:Câncer sem caquexia(WSC) e Câncer com caquexia (CC).A análise histopatológica mostrou que o estadiamento independende da caquexia e caracterização dos macrófagos infiltrantes resultou M2 menor em CC,já a expressão proteica de citocinas indicou IL-13 menor em CC e citocinas pró-iflamatórias estavam aumentadas em CC. A correlação de macrófagos com citocinas foi positiva com M1 e negativa com M2.Esses resultados fornecem evidências de que o tumor possui um perfil de secreção diferente entre os grupos no que diz respeito a fatores inflamatórios e diferentes percentuais de fenótipo de macrófagos.
Title in English
Role of the tumour inflammatory infiltrate and its contribution to systemic inflammation and the development of cachexia.
Keywords in English
Cachexia
Immune system
Inflammation
Tumor microenvironment
Abstract in English
Cancer cachexia is characterized by severe weight loss and large metabolic imbalance.It is a result of the interaction between the host's cells and the tumour, which induces systemic inflammation.Understand the relationship is required for the discovery of diagnostic markers.The aim of the present study was to characterize differences in inflammatory tumour infiltrate and molecular aspects in order to assess whether the presence of cachexia is determined by the inflammatory tumour profile. The study involved patients diagnosed with colorectal cancer and then distributed into two groups: cancer without cachexia(WSC) and cancer cachexia(CC).Histopathological analysis showed that the presence of cachexia in patients with colo-rectal cancer was independent from tumour staging.Characterization of infiltrating macrophages revealed a lower percentage of M2 profile in CC.Protein expression of cytokines demonstrated lower of IL-13 in CC and pro-inflammatory cytokines is higher in CC. Correlation between macrophages and cytokines was shown positive with macrophages type M1.These results provide evidence that tumor has a different secretion profile between the groups with regard to inflammatory factors and different percentages of macrophage phenotype.
 
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Publishing Date
2016-08-12
 
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