Expression of the 78kD glucose-regulated protein is induced by endoplasmic reticulum stress in the development of hepatopulmonary syndrome

Huiying Zhang, Minli Lv, Jiantao Jia, Zhongfu Zhao, Lili Zhang, Lina Lai, Yanjun Wu, Baohong Li, Chen Li, Jingquan Ji, Xiaoxia Tian, Yan Liu, Xujiong Li, Hui Pang, Jianhong Guo, Limin Wang, Yimin Fan, Cuiying Zhang, Dewu Han, Cheng Ji

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7 Citations (Scopus)

Abstract

Objective: This study is to explore the role of 78. kD glucose-regulated protein (GRP78) in the development of hepatopulmonary syndrome (HPS) in rats. Methods: The rat model of liver cirrhosis and HPS were induced with multiple pathogenic factors. Hematoxylin and eosin (H & E) staining was performed to detect the pathological changes of the lung and liver tissues. The levels of alanine transferase (ALT), endotoxin, and tumor necrosis factor-α (TNF-α) in plasma and TNF-α and malondialdehyde (MDA) in lung tissues were detected. RT-PCR and Western blotting were conducted to detect the mRNA and protein expression levels of GRP78 in lungs. Results: The plasma endotoxin level was gradually increased as HPS developed, and the mRNA and protein expression levels of GRP78 in lungs were also increased as the disease progressed. The levels of ALT and TNF-α in plasma and the contents of TNF-α and MDA in lung tissues were gradually increased along with the disease progression, with a strong positive correlation. Compared with controls, the plasma TNF-α level and the mRNA and protein expression levels of GRP78 in lung tissues were significantly higher in rats with HPS. The levels of endotoxin and ALT in plasma and the level of MDA in lungs were significantly higher in rats with HPS than controls. Conclusions: The increased GRP78 expression is indicative of endoplasmic reticulum stress response during HPS, which may play an important role in the disease pathogenesis.

Original languageEnglish
Pages (from-to)115-119
Number of pages5
JournalGene
Volume537
Issue number1
DOIs
Publication statusPublished - Mar 1 2014

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Keywords

  • 78kD glucose-regulated protein
  • Endoplasmic reticulum stress
  • Hepatopulmonary syndrome
  • Intestinal endotoxemia
  • Liver cirrhosis

ASJC Scopus subject areas

  • Genetics

Cite this

Zhang, H., Lv, M., Jia, J., Zhao, Z., Zhang, L., Lai, L., Wu, Y., Li, B., Li, C., Ji, J., Tian, X., Liu, Y., Li, X., Pang, H., Guo, J., Wang, L., Fan, Y., Zhang, C., Han, D., & Ji, C. (2014). Expression of the 78kD glucose-regulated protein is induced by endoplasmic reticulum stress in the development of hepatopulmonary syndrome. Gene, 537(1), 115-119. https://doi.org/10.1016/j.gene.2013.11.065