AI Article Synopsis
- The study investigates the effects of bosentan, an endothelin antagonist with anti-inflammatory properties, on acid aspiration-induced lung injury in rats.
- A randomised controlled trial was conducted where rats were subjected to lung injury through hydrochloric acid instillation, and subsequently treated with different doses of bosentan or sodium chloride.
- Results showed that the higher dose of bosentan (90mg/kg) significantly reduced the release of reactive oxygen species, indicating its potential therapeutic role in managing acute lung injury.
Article Abstract
Background: Acid aspiration induces lung injury by causing an intense inflammatory reaction. Neutrophils are attracted by various cytokines, such as TNFbeta, and release reactive oxygen species, which then cause acute lung injury. Endothelin antagonists, such as bosentan, have been found to possess anti-inflammatory properties.
Materials And Methods: We performed a prospective, randomised, controlled study to evaluate the effects of bosentan in a rat model of acid-induced lung injury. Sprague-Dawley rats underwent sevoflurane anaesthesia; lung injury was then induced by instillation of 1.2mL/kg, 0.1M hydrochloric acid. The lungs were ventilated for 6h and then randomised into three groups: bosentan 30mg/kg body weight, 90mg/kg body weight or sodium chloride, each applied immediately after acid aspiration via a gastric tube.
Results: After induction of acute lung inflammation, the production of reactive oxygen species by PMN following stimulation with FMLP increased significantly. Comparison of pre-treatment and post-treatment in the 90mg/kg bosentan treatment group did not show a significant increase of reactive oxygen species following stimulation with FMLP. A comparison of the absolute difference of the MESF demonstrated a significant difference between the control group and the group treated with 90mg/kg bosentan.
Conclusions: Bosentan administration at 90mg/kg body weight reduced the release of reactive oxygen species after 360min in acid aspiration-induced lung injury in rats.
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| http://dx.doi.org/10.1016/j.injury.2008.11.016 | DOI Listing |
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