Effects of hypoxia‑inducible factor‑1α and matrix metalloproteinase‑9 on alveolar‑capillary barrier disruption and lung edema in rat models of severe acute pancreatitis‑associated lung injury

  • Authors:
    • Bing Qi
    • Hai‑Long Chen
    • Dong Shang
    • Ying Dong
    • Gui‑Xin Zhang
    • Lei Yu
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  • Published online on: June 26, 2014     https://doi.org/10.3892/etm.2014.1810
  • Pages: 899-906
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Abstract

The aim of this study was to investigate the effects of hypoxia‑inducible factor‑1α (HIF‑1α) and matrix metalloproteinase‑9 (MMP‑9) on alveolar‑capillary barrier disruption and lung edema in rat models of severe acute pancreatitis‑associated lung injury (PALI). A total of 40 male Sprague‑Dawley rats were randomly divided into a sham surgery group (n=10) and three PALI groups, in which acute pancreatitis was induced by the retrograde infusion of 5% sodium taurocholate (1 ml/kg). The PALI groups were as follows: i) Untreated PALI group (n=10); ii) 2‑methoxyestradiol (2ME2) group (5 mg/kg body mass; n=10); and iii) 2ME2 group (15 mg/kg body mass; n=10). In the two 2ME2 groups, the HIF‑1α inhibitor 2ME2 was administered intraperitoneally 1 h after the induction of AP. The severity of the pancreatitis was evaluated by the serum amylase levels and pathology. The severity of the lung injury was evaluated by the wet/dry ratio, blood gas analysis and pathology. The alveolar‑capillary barrier disruption was assessed by Evans blue dye extravasation. The protein and mRNA expression levels of HIF‑1α and MMP‑9 were studied using enzyme‑linked immunosorbent assays (ELISAs), western blot analysis and reverse transcription‑polymerase chain reaction. The active tumor necrosis factor‑α levels were measured using an ELISA. The HIF‑1α inhibitor 2ME2 attenuated the severity of the pancreatitis and PALI, while the lung edema and alveolar‑capillary barrier disruption were significantly ameliorated compared with those in the untreated PALI group. Administration of the higher dose of 2ME2 significantly suppressed the protein expression of MMP‑9 in the lung tissues. The results indicate that HIF‑1α has a major function in alveolar‑capillary barrier disruption and lung edema in PALI via a molecular pathway cascade involving MMP‑9. Inhibition of HIF‑1α by 2ME2 attenuates alveolar‑capillary barrier disruption and lung edema. Pharmacological blockade of this pathway in patients with PALI may provide a novel therapeutic strategy.
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September-2014
Volume 8 Issue 3

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Qi B, Chen HL, Shang D, Dong Y, Zhang GX and Yu L: Effects of hypoxia‑inducible factor‑1α and matrix metalloproteinase‑9 on alveolar‑capillary barrier disruption and lung edema in rat models of severe acute pancreatitis‑associated lung injury. Exp Ther Med 8: 899-906, 2014.
APA
Qi, B., Chen, H., Shang, D., Dong, Y., Zhang, G., & Yu, L. (2014). Effects of hypoxia‑inducible factor‑1α and matrix metalloproteinase‑9 on alveolar‑capillary barrier disruption and lung edema in rat models of severe acute pancreatitis‑associated lung injury. Experimental and Therapeutic Medicine, 8, 899-906. https://doi.org/10.3892/etm.2014.1810
MLA
Qi, B., Chen, H., Shang, D., Dong, Y., Zhang, G., Yu, L."Effects of hypoxia‑inducible factor‑1α and matrix metalloproteinase‑9 on alveolar‑capillary barrier disruption and lung edema in rat models of severe acute pancreatitis‑associated lung injury". Experimental and Therapeutic Medicine 8.3 (2014): 899-906.
Chicago
Qi, B., Chen, H., Shang, D., Dong, Y., Zhang, G., Yu, L."Effects of hypoxia‑inducible factor‑1α and matrix metalloproteinase‑9 on alveolar‑capillary barrier disruption and lung edema in rat models of severe acute pancreatitis‑associated lung injury". Experimental and Therapeutic Medicine 8, no. 3 (2014): 899-906. https://doi.org/10.3892/etm.2014.1810