Identification of distinct genes associated with seawater aspiration‑induced acute lung injury by gene expression profile analysis

Liu,Wei; Pan,Lei; Zhang,Minlong; Bo,Liyan; Li,Congcong; Liu,Qingqing; Wang,Li; Jin,Faguang

doi:10.3892/mmr.2016.5607

Identification of distinct genes associated with seawater aspiration‑induced acute lung injury by gene expression profile analysis

Authors:
- Wei Liu
- Lei Pan
- Minlong Zhang
- Liyan Bo
- Congcong Li
- Qingqing Liu
- Li Wang
- Faguang Jin
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Affiliations: Department of Pulmonary Diseases, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710038, P.R. China
Published online on: August 9, 2016 https://doi.org/10.3892/mmr.2016.5607
Pages: 3168-3178
Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Seawater aspiration‑induced acute lung injury (ALI) is a syndrome associated with a high mortality rate, which is characterized by severe hypoxemia, pulmonary edema and inflammation. The present study is the first, to the best of our knowledge, to analyze gene expression profiles from a rat model of seawater aspiration‑induced ALI. Adult male Sprague‑Dawley rats were instilled with seawater (4 ml/kg) in the seawater aspiration‑induced ALI group (S group) or with distilled water (4 ml/kg) in the distilled water negative control group (D group). In the blank control group (C group) the rats' tracheae were exposed without instillation. Subsequently, lung samples were examined by histopathology; total protein concentration was detected in bronchoalveolar lavage fluid (BALF); lung wet/dry weight ratios were determined; and transcript expression was detected by gene sequencing analysis. The results demonstrated that histopathological alterations, pulmonary edema and total protein concentrations in BALF were increased in the S group compared with in the D group. Analysis of differential gene expression identified up and downregulated genes in the S group compared with in the D and C groups. A gene ontology analysis of the differential gene expression revealed enrichment of genes in the functional pathways associated with neutrophil chemotaxis, immune and defense responses, and cytokine activity. Kyoto Encyclopedia of Genes and Genomes analysis revealed that the cytokine‑cytokine receptor interaction pathway was one of the most important pathways involved in seawater aspiration‑induced ALI. In conclusion, activation of the cytokine‑cytokine receptor interaction pathway may have an essential role in the progression of seawater aspiration‑induced ALI, and the downregulation of tumor necrosis factor superfamily member 10 may enhance inflammation. Furthermore, IL‑6 may be considered a biomarker in seawater aspiration‑induced ALI.

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