• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Doctoral Thesis
DOI
10.11606/T.9.2017.tde-07072017-182830
Document
Author
Full name
Eduardo Lima Nolasco
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2017
Supervisor
Committee
Martins, Joilson de Oliveira (President)
Keller, Alexandre de Castro
Volpini, Rildo Aparecido
Salomão, Reinaldo
Title in Portuguese
Insulina regula a translocação nuclear de NF-κB p65, inflamação e morte celular em modelo experimental de sepse em camundongos diabéticos
Keywords in Portuguese
Citocinas
CLP
Diabetes mellitus
Disfunção de órgãos
Lesão renal
Sepses
Abstract in Portuguese
Sepse é uma resposta sistêmica e deletéria do indivíduo a uma infecção, sendo um importante problema de saúde pública. Pacientes diabéticos são bastante afetados representando cerca de 22% de todos os pacientes sépticos. A suscetibilidade para o desenvolvimento de sepse no diabetes, bem como a ação da insulina em modular alguns parâmetros imunológicos necessitam de maiores esclarecimentos O objetivo deste estudo foi avaliar os efeitos do tratamento com insulina em um modelo murino de diabetes e sepse. Camundongos C57BL/6 foram tornados diabéticos por administração de aloxana. Os seguintes parâmetros foram analisados vinte e quatro horas após a ligadura cecal e punção (CLP): (a) interleukine (IL)-6, IL-10, chemokine (C -C motif) ligand 2 (CCL2) e tumor necrosis fator (TNF ) -α no soro; (b) os níveis de IL-1β, IL-6, TNF-α, IL-10, chemokine (C -X-C motif) ligand (CXCL)-1 e CXCL2 no lavado peritoneal (LPe) e broncoalveolar (LBA), bem como nos rins e fígado; (c) contagens celulares totais e diferenciais em LPe e LBA; (d) capacidade endocítica de neutrófilos e produção de espécies reactivas de oxigénio (ERO); (e) níveis de apoptose e necrose no baço e níveis relativos de células CD4+ e CD8+; (f) resultados histopatológicos de pulmão, rim e fígado; e (g) níveis de translocação nuclear de NF-κB p65. Camundongos diabéticos-CLP exibiram concentrações séricas aumentadas de TNF-α, IL-6, CCL2, IL-1, IL-6, CXCL1, CXCL2 e IL-10 e contagens de neutrófilos em LPe. A capacidade endocítica dos neutrófilos e a produção de ERO apresentavam-se reduzidas em animais CLP-diabéticos e os níveis de IL-6, TNF-α, CXCL1 e CXCL2 em LBA e IL-1β, IL-6, CXCL1 e CXCL2 nos homogenados renais aumentaram diabéticos -CLP. O tratamento destes com insulina reduziu os nívies de citocinas séricas, aumentou a concentração de citocinas e a migração celular para o Lpe, restaurou a capacidade endocítica e a produção de ERO e reduziu a translocação nuclear NF-κB p65 no tecido renal. Estes dados sugerem que a insulina modula a produção/libertação de citocinas, regula a migração celular, a apoptose, a necrose e a translocação nuclear de NF-κB p65 na sepse induzida por CLP em camundongos diabéticos.
Title in English
Insulin regulates NF-κB p65 nuclear translocation, inflammation and cell death in septic diabetic mice
Keywords in English
CLP
Cytokines
Diabetes mellitus
Kidney injury
Organ dysfunction
Sepsis
Abstract in English
Sepsis is a systemic and harmful response of the individual to infection and is an important public health problem. Diabetic patients are greatly affected representing about 22% of all septic patients. The susceptibility to sepsis development in diabetic individuals and insulin action in modulating some immunological parameters require further clarification. The aim of this study was to evaluate the effects of insulin treatment in a mouse model of diabetes and sepsis. C57BL/6 mice were rendered diabetic by alloxan administration. The following parameters were analyzed twenty-four hours after a cecal ligation and puncture (CLP): (a) interleukin (IL)-6, IL-10, chemokine (C-C motif) ligand 2 (CCL2), and tumor necrosis factor (TNF) - α levels in serum; (b) IL-1β, IL-6, TNF-α, IL-10, chemokine (C-X-C motif) ligand (CXCL)1 and CXCL2 levels in peritoneal lavage (PeL) and bronchoalveolar lavage (BAL) fluid, as well as in the kidneys and liver; (c) total and differential cell counts in PeL and BAL fluid; (d) neutrophil endocytic capacity and reactive oxygen species (ROS) production; (e) spleen cell apoptosis and necrosis levels and relative CD4+ and CD8+ T cell levels; (f) lung, kidney, and liver histopathological results; and (g) NF-kB p65 nuclear translocation levels. Diabetic-CLP mice exhibited increased serum TNF-α, IL-6, CCL2, IL-1, IL-6, CXCL1, CXCL2 and IL-10 concentrations and neutrophil counts in PeL fluid. Neutrophil endocytic capacity and ROS production were decreased in diabetic-CLP mice, and IL-6, TNF- α, CXCL1 and CXCL2 leves in BAL fluid and IL-1β, IL-6, CXCL1 and CXCL2 levels in kidney homogenates were increased in diabetic-CLP mice. Treatment of these mice with insulin reduced serum cytokine levels increased cytokine and cell migration into PeL fluid, and restored neutrophil endocytic capacity and ROS production and NF-kB p65 nuclear translocation in the kidney. These data suggest that insulin modulates cytokine production/release, regulates cellular migration, apoptosis, necrosis and NF-kB p65 nuclear translocation in CLP-induced sepsis in diabetic mice.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2017-07-13
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2021. All rights reserved.