CFTR dysfunction induces vascular endothelial growth factor synthesis in airway epithelium.

نویسندگان

  • Clémence Martin
  • Nathalie Coolen
  • Yongzheng Wu
  • Guiti Thévenot
  • Lhousseine Touqui
  • Virginie Prulière-Escabasse
  • Jean-François Papon
  • André Coste
  • Estelle Escudier
  • Daniel J Dusser
  • Isabelle Fajac
  • Pierre-Régis Burgel
چکیده

Peribronchial angiogenesis may occur in cystic fibrosis and vascular endothelial growth factor (VEGF)-A regulates angiogenesis in airways. Peribronchial vascularity and VEGF-A expression were examined using immunocytochemistry and morphometric analysis in lung sections obtained in 10 cystic fibrosis patients at transplantation versus 10 control nonsmokers, and in two strains of Cftr-deficient mice versus wild-type littermates. Airway epithelial NCI-H292 cells and primary cultures of noncystic fibrosis human airway epithelial cells were treated with cystic fibrosis transmembrane conductance regulator (CFTR) inhibitors (CFTR-inh(172) or PPQ-102) or transfected with a CFTR small interfering (si)RNA with or without a selective epidermal growth factor receptor tyrosine kinase inhibitor. Concentrations of VEGF-A and phosphorylated epidermal growth factor receptor were measured by ELISA. Peribronchial vascularity was increased in cystic fibrosis patients, but not in Cftr-deficient mice. VEGF-A immunostaining was localised to airway epithelium and was increased in cystic fibrosis patients and in Cftr-deficient mice. In cultured airway epithelial cells, treatment with CFTR inhibitors or transfection with CFTR siRNA induced a twofold increase in VEGF-A production. CFTR inhibitors triggered epidermal growth factor receptor phosphorylation that was required for VEGF-A synthesis. Cystic fibrosis airways at transplantation showed increased peribronchial vascularity and epithelial VEGF-A expression. CFTR dysfunction triggered epithelial synthesis of VEGF-A, which may contribute to vascular remodelling.

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عنوان ژورنال:
  • The European respiratory journal

دوره 42 6  شماره 

صفحات  -

تاریخ انتشار 2013