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Pathophysiologic consequences following inhibition of a CFTR-dependent developmental cascade in the lung

J Craig Cohen1, Janet E Larson

  • 1Louisiana State University Health Sciences Center, Department of Medicine, School of Medicine, New Orleans, LA 70112, USA. ccohen@lsuhsc.edu

BMC Developmental Biology
|February 8, 2005
PubMed
Abstract

Insights

Transient in utero gene knockout in rats revealed the cystic fibrosis transmembrane conductance regulator (CFTR) gene

Area of Science:

  • Developmental biology
  • Genetics
  • Respiratory medicine

Background:

  • Studying late gestation developmental genes is challenging due to early lethality and compensatory mechanisms.
  • The role of the cystic fibrosis transmembrane conductance regulator (CFTR) gene in cystic fibrosis (CF) pathophysiology is difficult to assess.
  • Transient in utero knockout (TIUKO) technology offers a novel approach to overcome these limitations.

Purpose of the Study:

  • To investigate the developmental role of the CFTR gene in the rat lung using TIUKO technology.
  • To model aspects of the human cystic fibrosis phenotype in utero.

Main Methods:

  • Utilized transient in utero knockout (TIUKO) technology in rat fetuses.
  • Administered antisense cftr to transiently disrupt CFTR gene function during development.

Main Results:

  • Rat fetuses treated with antisense cftr exhibited pathologies mirroring human CF.
  • Developed lung fibrosis, chronic inflammation, and reactive airway disease.
  • Expressed the CF Antigen (MRP8/14), a recognized marker for CF in human patients.

Conclusions:

  • TIUKO technology is effective for evaluating genes with early lethality or compensatory phenotypes.
  • CFTR is crucial for normal secretory cell differentiation in lung development.
  • CFTR absence leads to a constitutive inflammatory process contributing to CF pathophysiology.

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