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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2010.tde-06082010-133158
Document
Author
Full name
Luana Beatriz Vitoretti
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Lima, Wothan Tavares de (President)
Câmara, Niels Olsen Saraiva
Martins, Milton de Arruda
Title in Portuguese
Perfil temporal da inflamação pulmonar induzida pela isquemia/reperfusão intestinal em ratos. Estudo do papel do sistema linfático.
Keywords in Portuguese
Doença pulmonar (Especialidade)
Inflamação
Isquemia / Reperfusão intestinal
Pulmão
SDRA
Sistema linfático
Abstract in Portuguese
A isquemia/reperfusão intestinal (I/R-i) se associa ao desenvolvimento de inflamação pulmonar aguda, que pode ser modulada por mediadores inflamatórios presentes na linfa. Avaliamos os efeitos da I/R-i sob a inflamação pulmonar e a participação do sistema linfático. Wistar machos foram submetidos a 45 min de isquemia intestinal e 24, 72 ou 120 h de reperfusão. Outro grupo teve o ducto linfático bloqueado antes da isquemia. Os resultados revelaram maior inflamação pulmonar nos animais reperfundidos por 120 h em relação aos outros períodos de reperfusão estudados. Os animais apresentaram aumento de MPO e permeabilidade. Aumento de VEGF e de IL-1β e diminuição de IL-10 no explante pulmonar. Diminuição de vWf e aumento de integrina β1, PECAM-1 e colágeno I e IV no endotélio pulmonar. Os dados indicam que mecanismos temporais modulam a resposta inflamatória decorrente da I/R-i. Mediadores na linfa e na circulação participam do desencadeamento/manutenção da inflamação pulmonar alterando a integridade do endotélio e ativando o pulmão que libera mediadores adicionais.
Title in English
Time profile of lung inflammation induced by intestinal ischemia/reperfusion in rats. Role of the lymphatic system.
Keywords in English
ARDS
Inflammation
Intestinal ischemia / Reperfusion
Lung
Lymphatic system
Pulmonary disease (Specialty)
Abstract in English
Intestinal ischemia/reperfusion (i-I/R) is associated with the development of acute lung inflammation, which can be modulated by inflammatory mediators present in the lymph. We evaluated the effects of i-I/R in lung inflammation and the involvement of the lymphatic system. Wistar rats were subjected to 45 min of intestinal ischemia and 24, 72 or 120 h of reperfusion. Another group had the lymphatic duct blocked before ischemia. The results revealed greater lung inflammation in animals reperfused for 120 h in comparison to other periods studied. These animals showed increased MPO and permeability. Increased VEGF and IL-1β and decreased IL-10 in lung explants. Decreased vWf and increased β1 integrin, PECAM-1 and collagen I and IV in the pulmonary endothelium. These data indicate that temporal mechanisms modulate the inflammatory response due to i-I/R. Mediators in the lymph and circulation participate in the initiation / maintenance of lung inflammation by altering the integrity of the endothelium and activating the lung which release additional mediators.
 
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Publishing Date
2010-09-13
 
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