Effects of CFTR, interleukin-10, and Pseudomonas aeruginosa on gene expression profiles in a CF bronchial epithelial cell Line

Mol Ther. 2004 Sep;10(3):562-73. doi: 10.1016/j.ymthe.2004.06.215.


Mutations in CFTR lead to a complex phenotype that includes increased susceptibility to Pseudomonas infections, a functional deficiency of IL-10, and an exaggerated proinflammatory cytokine response. We examined the effects of CFTR gene correction on the gene expression profile of a CF bronchial epithelial cell line (IB3-1) and determined which CF-related gene expression changes could be reversed by IL-10 expression. We performed microarray experiments to monitor the gene expression profile of three cell lines over a time course of exposure to Pseudomonas. At baseline, we identified 843 genes with statistically different levels of expression in CFTR-corrected (S9) cells compared to the IB3-1 line or the IL-10-expressing line. K-means clustering and functional group analysis revealed a primary up-regulation of ubiquitination enzymes and TNF pathway components and a primary down-regulation of protease inhibitors and protein glycosylation enzymes in CF. Key gene expression changes were confirmed by real-time RT-PCR. Massive reprogramming of gene expression occurred 3 h after Pseudomonas exposure. Changes specific to CF included exaggerated activation of cytokines, blunted activation of anti-proteases, and repression of protein glycosylation enzymes. In conclusion, the CFTR genotype changes the expression of multiple genes at baseline and in response to bacterial challenge, and only a subset of these changes is secondary to IL-10 deficiency.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Bronchi / cytology
  • Bronchi / metabolism*
  • Cell Line
  • Cystic Fibrosis / genetics
  • Cystic Fibrosis Transmembrane Conductance Regulator / biosynthesis*
  • Cystic Fibrosis Transmembrane Conductance Regulator / genetics
  • Epithelial Cells / metabolism*
  • Gene Expression Profiling*
  • Humans
  • Interleukin-10 / biosynthesis*
  • Interleukin-10 / genetics
  • Mutation
  • Pseudomonas aeruginosa*
  • Respiratory Mucosa / cytology
  • Respiratory Mucosa / metabolism
  • Transfection


  • Cystic Fibrosis Transmembrane Conductance Regulator
  • Interleukin-10