• 1. Department of Respiratory Medicine, Guangzhou General Hospital of Guangzhou Military command, Guangzhou, Guangdong 510010, P.R.China;
  • 2. Department of Respiratory Medicine, 458th Hospital of PLA, Guangzhou, Guangdong 510062, P.R.China;
HUANG Wenjie, Email: huangyelu1029@vip.163.com
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ObjectiveTo compare two different ways to establish mouse model with acute lung injury (ALI) via intratracheal instillation or intraperitoneal injection of lipopolysaccharide (LPS). MethodsBALB/c mice received intraperitoneal/intratracheal administration of LPS or sham operation. Wet/dry lung weight ratio, protein concentration in bronchoalveolar lavage fluid (BALF), and lung tissue histology were examined at 0, 1, 2, 6, 12, 18, 24, 48 h after LPS administration. Tumor necrosis factor-α (TNF-α) in BALF and serum was assayed with ELISA method. ResultsLPS treatment significantly increased wet/dry lung weight ratio, BALF protein concentration and TNF-α concentration in serum and BALF. Lung tissue was damaged after LPS challenge. The mice received LPS intraperitoneal injection got a more significant lung edema than those received LPS intratracheal instillation. Inversely, LPS intratracheal instillation induced more severed microstructure destruction. ConclusionsALI animal model by LPS intratracheal instillation or intraperitoneal injection induces inflammation and tissue damage in lung. However, the degree of tissue damage or self-healing induced by two methods is different. Therefore the decision of which way to establish ALI model will depend on the study purpose.

Citation: YUAN Weifeng, LI Li, XU Hong, HU Yujie, HUANG Wenjie. Intraperitoneal instillation versus intratracheal injection of lipopolysaccharide: differences in establishment of acute lung injury model. Chinese Journal of Respiratory and Critical Care Medicine, 2017, 16(3): 274-279. doi: 10.7507/1671-6205.201610045 Copy

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