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PubMed 22976418


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Automatically associated channels: Kv10.1



Title: Molecular mechanism of sustained inflation in acute respiratory distress syndrome.

Authors: Feng Zhao, Wei Wang, Yong Fang, Xiantao Li, Lei Shen, Tongwa Cao, Hechen Zhu

Journal, date & volume: J Trauma Acute Care Surg, 2012 Nov , 73, 1106-13

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/22976418


Abstract
The aim of this study was to investigate the effect and the potential molecular mechanism of sustained inflation (SI) recruitment maneuvers in acute respiratory distress syndrome (ARDS) in beagle dog following endotracheal suctioning.ARDS was induced in 24 beagle dogs with oleic acid. They had mechanical ventilation support. They were randomized into four groups after the establishment of the ARDS model: non-SI-open group where no SI was applied in beagle dogs with ARDS following open endotracheal suctioning; non-SI-closed group where no SI was applied in beagle dogs with ARDS following closed endotracheal suctioning; SI-open group where SI was applied in beagle dogs with ARDS following open endotracheal suctioning; and SI-closed group where SI was applied in beagle dogs with ARDS following closed endotracheal suctioning. Oxygenation, indexes of respiratory mechanics, and hemodynamic indexes were serially measured during the procedure. The serum protein level, or the messenger RNA in the heart and lung, of inflammation-related cytokines was investigated.SI in ARDS improved oxygenation, lung compliance, and airway resistance but had no significant effect in the hemodynamic indexes. At molecular level, SI in ARDS neutralized the increases of pro-inflammatory cytokines (tumor necrosis factor α, interleukin 1β [IL-1β], and IL-6), and anti-inflammatory cytokine (IL-10) in the serum. Furthermore, SI in ARDS increased aquaporin 1 and aquaporin 5 messenger RNA in the lung tissue, and decreased IL-6 messenger RNA in the lung and heart tissue.SI in ARDS could improve oxygenation, lung compliance, and airway resistance, which was related to the improved degree of inflammation and better maintained aquaporins.