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Related Experiment Video

Updated: Jul 3, 2026

Generation of 3D Whole Lung Organoids from Induced Pluripotent Stem Cells for Modeling Lung Developmental Biology and Disease
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Published on: April 12, 2021

Kruppel-like factor 5 is required for perinatal lung morphogenesis and function.

Huajing Wan1, Fengming Luo, Susan E Wert

  • 1Division of Pulmonary Biology, Cincinnati Children's Hospital Medical Center and the University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH 45229-3039, USA.

Development (Cambridge, England)
|July 5, 2008
PubMed
Summary
This summary is machine-generated.

Kruppel-like factor 5 (Klf5) is essential for fetal lung development and maturation. Its absence in respiratory epithelial cells leads to severe respiratory distress and death immediately after birth due to inhibited lung maturation.

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Area of Science:

  • Developmental Biology
  • Pulmonary Medicine
  • Molecular Genetics

Background:

  • Lung development involves complex paracrine signaling between epithelial and mesenchymal cells.
  • Proper lung maturation, including anatomic and biochemical aspects, is critical for transitioning to air breathing post-birth.

Purpose of the Study:

  • To investigate the role of Kruppel-like factor 5 (Klf5) in fetal lung development and maturation.
  • To determine the consequences of conditional Klf5 deletion in respiratory epithelial cells on lung morphogenesis and function.

Main Methods:

  • Generation of transgenic mice with conditional Klf5 deletion in fetal respiratory epithelial cells.
  • Analysis of lung morphology, histology, and gene expression (mRNA microarray) in Klf5-deficient mice.
  • Assessment of respiratory function and survival rates post-birth.

Main Results:

  • Conditional deletion of Klf5 in fetal respiratory epithelial cells severely inhibited lung maturation during the saccular stage.
  • Klf5(Delta/Delta) mice exhibited respiratory distress and mortality immediately after birth.
  • Observed abnormalities included immature respiratory epithelium, reduced surfactant phospholipids, decreased lamellar bodies, and altered expression of genes involved in vasculogenesis (e.g., Vegfa) and smooth muscle differentiation.

Conclusions:

  • Klf5 is a critical regulator of lung morphogenesis and epithelial maturation.
  • Klf5 influences gene expression programs controlling surfactant homeostasis, vascular development, and smooth muscle differentiation.
  • Klf5 plays a vital role in ensuring the lung's readiness for air breathing after birth.