Deletion of Shp2 in bronchial epithelial cells impairs IL-25 production in vitro, but has minor influence on asthmatic inflammation in vivo

PLoS One. 2017 May 8;12(5):e0177334. doi: 10.1371/journal.pone.0177334. eCollection 2017.

Abstract

Shp2 played an important role in cigarette-smoke-mediated inflammation, surfactant homeostasis and asthmatic airway remodeling. However, whether shp2 plays a key role in epithelium-associated allergic reaction is still unknown. In this study, LPS and OVA were observed to induce the production of IL-25 in bronchial epithelial cells in vitro via the activation of MAPK p38 and JNK. Furthermore, blockage of Shp2 by its specific inhibitor PHPS1 or by siRNA-mediated depletion was found to reduce the production of IL-25 in epithelial cells as well as the up-regulated LPS-triggered activation of JNK but not p38. To confirm the role of intra-bronchial epithelial Shp2 in OVA-induced allergic reaction, we generated CC10-rtTA/(tetO)7-Cre/Shp2f/f mice, where Shp2 was conditionally knocked out in bronchial epithelial cells. Surprisingly, specific deletion of Shp2 in bronchial epithelial cells showed a mild but insignificant effect on the expressions of epithelium-derived cytokines as well as TH2 and TH17 polarization following allergen-induced murine airway inflammation. Collectively, our data suggested that deletion of Shp2 impaired IL-25 production in bronchial epithelial cells in vitro, but might yet have minor influence on OVA-induced allergic reaction in vivo.

MeSH terms

  • Animals
  • Asthma / metabolism*
  • Bronchi / cytology
  • Bronchi / metabolism*
  • Cell Line
  • Enzyme Activation
  • Epithelial Cells / metabolism
  • Female
  • Humans
  • In Vitro Techniques
  • Inflammation / metabolism
  • Interleukins / biosynthesis*
  • Lipopolysaccharides / pharmacology
  • MAP Kinase Kinase 4 / metabolism
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Protein Tyrosine Phosphatase, Non-Receptor Type 11 / genetics
  • Protein Tyrosine Phosphatase, Non-Receptor Type 11 / physiology*
  • RNA, Small Interfering / genetics
  • p38 Mitogen-Activated Protein Kinases / metabolism

Substances

  • Interleukins
  • Lipopolysaccharides
  • Mydgf protein, mouse
  • RNA, Small Interfering
  • p38 Mitogen-Activated Protein Kinases
  • MAP Kinase Kinase 4
  • Protein Tyrosine Phosphatase, Non-Receptor Type 11
  • Ptpn11 protein, mouse

Grants and funding

This work was supported by the National Basic Research Program of China (973 Program) grant 2009CB522103. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.