Perfluorocarbon inhibits lipopolysaccharide-induced macrophage inflammatory protein-2 expression and activation of ATF-2 and c-Jun in A549 pulmonary epithelial cells

Cell Mol Biol (Noisy-le-grand). 2016 Apr 30;62(4):18-24.

Abstract

The signaling pathway that mediates the anti-inflammatory effects of perfluorocarbon (PFC) in alveolar epithelial cells treated with lipopolysaccharide (LPS) remains unclear. To evaluate the role of macrophage-inflammatory protein-2 (MIP-2), four A549 treatment groups were utilized: (1) untreated control, (2) 10 μg/mL of LPS, (3) 10 μg/mL of LPS+30% PFC and (4) 30% PFC. MIP-2 mRNA expression was determined by qPCR and ELISA. Mitogen-activated protein kinase (MAPK) activation was determined by Western blot analysis, and MIP-2 expression was determined by qPCR following treatment with MAPK inhibitors. PFC suppressed LPS-induced MIP-2 mRNA levels (P≤0.035) and MIP-2 secretion (P≤0.046). LPS induced ATF-2 and c-Jun phosphorylation, which was suppressed by PFC. Finally, inhibitors of ERK, JNK, and p38 suppressed LPS-induced MIP-2 mRNA expression. Thus, PFC inhibits LPS-induced MIP-2 expression and ATF-2 and c-Jun phosphorylation. To fully explore the therapeutic potential of PFC for acute lung injury (ALI), in vivo analyses are required to confirm these effects.

MeSH terms

  • A549 Cells
  • Activating Transcription Factor 2 / metabolism*
  • Blotting, Western
  • Chemokine CXCL2 / genetics*
  • Chemokine CXCL2 / metabolism
  • Enzyme Activation / drug effects
  • Epithelial Cells / drug effects
  • Epithelial Cells / metabolism*
  • Fluorocarbons / toxicity*
  • Gene Expression Regulation / drug effects
  • Humans
  • JNK Mitogen-Activated Protein Kinases / metabolism*
  • Lipopolysaccharides / pharmacology*
  • Lung / pathology*
  • Models, Biological
  • Protein Kinase Inhibitors / pharmacology
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism

Substances

  • Activating Transcription Factor 2
  • Chemokine CXCL2
  • Fluorocarbons
  • Lipopolysaccharides
  • Protein Kinase Inhibitors
  • RNA, Messenger
  • JNK Mitogen-Activated Protein Kinases