Effects of sevoflurane on tight junction protein expression and PKC-α translocation after pulmonary ischemia-reperfusion injury

Exp Mol Med. 2015 Jun 5;47(6):e167. doi: 10.1038/emm.2015.27.

Abstract

Pulmonary dysfunction caused by ischemia-reperfusion injury is the leading cause of mortality in lung transplantation. We aimed to investigate the effects of sevoflurane pretreatment on lung permeability, tight junction protein occludin and zona occludens 1 (ZO-1) expression, and translocation of protein kinase C (PKC)-α after ischemia-reperfusion. A lung ischemia-reperfusion injury model was established in 96 male Wistar rats following the modified Eppinger method. The rats were divided into four groups with 24 rats in each group: a control (group C), an ischemia-reperfusion group (IR group), a sevoflurane control group (sev-C group), and a sevoflurane ischemia-reperfusion group (sev-IR group). There were three time points in each group: ischemic occlusion for 45 min, reperfusion for 60 min and reperfusion for 120 min; and there were six rats per time point. For the 120-min reperfusion group, six extra rats underwent bronchoalveolar lavage. Mean arterial pressure (MAP) and pulse oxygen saturation (SpO2) were recorded at each time point. The wet/dry weight ratio and lung permeability index (LPI) were measured. Quantitative RT-PCR and Western blot were used to measure pulmonary occludin and ZO-1, and Western blot was used to measure cytosolic and membranous PKC-α in the lung. Lung permeability was significantly increased after ischemia-reperfusion. Sevoflurane pretreatment promoted pulmonary expression of occludin and ZO-1 after reperfusion and inhibited the translocation of PKC-α. In conclusion, sevoflurane pretreatment alleviated lung permeability by upregulating occludin and ZO-1 after ischemia-reperfusion. Sevoflurane pretreatment inhibited the translocation and activation of PKC-α, which also contributed to the lung-protective effect of sevoflurane.

MeSH terms

  • Anesthetics, Inhalation / therapeutic use*
  • Animals
  • Capillary Permeability / drug effects
  • Gene Expression Regulation / drug effects
  • Lung / drug effects*
  • Lung / metabolism
  • Lung / pathology
  • Lung Diseases / drug therapy*
  • Lung Diseases / genetics
  • Lung Diseases / metabolism
  • Lung Diseases / pathology
  • Male
  • Methyl Ethers / therapeutic use*
  • Protein Kinase C-alpha / metabolism*
  • Protein Transport / drug effects
  • RNA, Messenger / genetics
  • Rats, Wistar
  • Reperfusion Injury / drug therapy*
  • Reperfusion Injury / genetics
  • Reperfusion Injury / metabolism
  • Reperfusion Injury / pathology
  • Sevoflurane
  • Zonula Occludens-1 Protein / analysis
  • Zonula Occludens-1 Protein / genetics*

Substances

  • Anesthetics, Inhalation
  • Methyl Ethers
  • RNA, Messenger
  • Zonula Occludens-1 Protein
  • Sevoflurane
  • Protein Kinase C-alpha