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Erschienen in: Intensive Care Medicine 7/2011

01.07.2011 | Original

Hyperbaric oxygen therapy reduces the toll-like receptor signaling pathway in multiple organ failures

verfasst von: Barbara Rinaldi, Salvatore Cuzzocrea, Maria Donniacuo, Annalisa Capuano, Donatella Di Palma, Francesco Imperatore, Emanuela Mazzon, Rosanna Di Paola, Loredana Sodano, Francesco Rossi

Erschienen in: Intensive Care Medicine | Ausgabe 7/2011

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Abstract

Purpose

Zymosan-induced generalized inflammation is the only experimental model that reproduces characteristics of human multiple organ dysfunction syndrome (MODS). Toll-like receptors (TLRs) are key components in innate immune responses and their signaling pathway is known to activate target genes such as nuclear factor-κB (NF-κB) and cytokines that are involved in inflammation and immune responses. We previously reported that hyperbaric oxygen (HBO) therapy is effective in the treatment of severe zymosan-induced inflammation in MODS. The aim of this study was to investigate the effect of HBO exposure on TLR2 and TLR4 signal transduction and organ dysfunction during MODS induced by zymosan in the rat.

Methods

Male Wistar rats were randomized into four groups and treated as follows: (1) saline solution (control); (2) zymosan; (3) HBO 4 and 11 h after zymosan injection; (4) HBO 4 and 11 h after saline solution injection. Zymosan-induced damage of the lungs, liver, and small intestine was evaluated using histology and biochemistry. The activation of the TLR signaling pathway was measured with Western blot, reverse transcriptase polymerase chain reaction analysis (RT-PCR), and immunohistochemistry.

Results

Zymosan induced a severe inflammatory response characterized by the activation of the TLR signaling pathway and by an organ dysfunction. HBO exposure significantly reduced the development of lung, liver, and intestine injury in our experimental model. It also significantly reduced the zymosan-induced expression of TLR2 and TLR4, NF-κB activation, and cytokine production.

Conclusions

Taken together, these results suggest that, by interfering with the TLR pathway, HBO treatment may exert a protective effect against tissue injury caused by zymosan-induced generalized inflammation.
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Metadaten
Titel
Hyperbaric oxygen therapy reduces the toll-like receptor signaling pathway in multiple organ failures
verfasst von
Barbara Rinaldi
Salvatore Cuzzocrea
Maria Donniacuo
Annalisa Capuano
Donatella Di Palma
Francesco Imperatore
Emanuela Mazzon
Rosanna Di Paola
Loredana Sodano
Francesco Rossi
Publikationsdatum
01.07.2011
Verlag
Springer-Verlag
Erschienen in
Intensive Care Medicine / Ausgabe 7/2011
Print ISSN: 0342-4642
Elektronische ISSN: 1432-1238
DOI
https://doi.org/10.1007/s00134-011-2241-1

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