Modulation of mitogen‑activated protein kinase attenuates sepsis‑induced acute lung injury in acute respiratory distress syndrome rats

Mol Med Rep. 2017 Dec;16(6):9652-9658. doi: 10.3892/mmr.2017.7811. Epub 2017 Oct 17.

Abstract

Sepsis is the most important predisposing cause inducing acute respiratory distress syndrome (ARDS); however, the mechanism of sepsis leading to the development of ARDS remains to be elucidated. Suppression of the mitogen‑activated protein kinase (MAPK) signal by blocking the phosphorylation of Jun N‑terminal kinase (JNK) and p38 in lung tissues could alleviate acute lung injury induced by sepsis. MAPK signaling may have a crucial role in development of the sepsis‑induced acute lung injury. The specific inhibitors of JNK and p38 MAPK, SP600125 and SB203580, were administrated by intragastric injection 4 h before induction of ARDS after cecal ligation and puncture (CLP). Rats were sacrificed at 1, 6 or 24 h after CLP challenge. The histological evaluation, lung water content, and biochemical analysis were performed. The results revealed that the JNK and p38 MAPK inhibitor improved lung permeability, attenuated system inflammation, further alleviated the lung injury induced by sepsis. In conclusion, JNK and p38 MAPK signaling are essential for the development of ARDS following sepsis. Further studies are needed to illuminate the detailed mechanisms of JNK and p38 MAPK signaling in sepsis‑induced ARDS.

MeSH terms

  • Acute Lung Injury / etiology*
  • Acute Lung Injury / metabolism*
  • Acute Lung Injury / pathology
  • Animals
  • Cytokines / metabolism
  • Disease Models, Animal
  • Inflammation Mediators / metabolism
  • JNK Mitogen-Activated Protein Kinases / metabolism
  • Male
  • Mitogen-Activated Protein Kinases / metabolism*
  • Rats
  • Respiratory Distress Syndrome / etiology*
  • Respiratory Distress Syndrome / metabolism*
  • Respiratory Distress Syndrome / pathology
  • Sepsis / complications*
  • p38 Mitogen-Activated Protein Kinases / metabolism

Substances

  • Cytokines
  • Inflammation Mediators
  • JNK Mitogen-Activated Protein Kinases
  • Mitogen-Activated Protein Kinases
  • p38 Mitogen-Activated Protein Kinases