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Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
Published on: October 31, 2025
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[Mormorphological and functional changes of lung cells in hyperoxia environment]
Juan Wang1, Dong Huang, Lianqin Mo
1Guizhou Medical University, Guiyang 550001, Guizhou, China (Wang J, Mo LQ, Ma X, Huang Y); Department of Pediatrics Intensive Care Unit, Guizhou Province People's Hospital, Guiyang 550002, Guizhou, China (Huang D). Corresponding author: Huang Dong,
Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
|September 18, 2018
Summary
High oxygen levels harm lung cells, increasing reactive oxygen species (ROS) and apoptosis. Type II alveolar epithelial cells (AEC II) show reduced migration, while lung fibroblasts (LFs) exhibit increased migration under hyperoxia.
Area of Science:
- Cell Biology
- Pulmonary Medicine
- Toxicology
Background:
- Hyperoxia, or high oxygen concentration, is a critical environmental factor impacting lung tissue.
- Understanding cellular responses to hyperoxia is crucial for managing lung diseases and injuries.
Purpose of the Study:
- To investigate the morphological and functional alterations in Type II alveolar epithelial cells (AEC II) and lung fibroblasts (LFs) when exposed to a hyperoxia environment.
- To elucidate the role of reactive oxygen species (ROS) and apoptosis in these cellular changes.
Main Methods:
- Primary cultures of fetal rat AEC II and LFs were established and exposed to either ambient air (21% O2) or hyperoxia (90% O2).
- Morphological changes were observed microscopically; cell migration was assessed using scratch assays.
- Intracellular ROS levels and apoptosis rates were quantified via flow cytometry.
Main Results:
- Hyperoxia induced morphological changes in both cell types, with AEC II becoming loosely arranged and LFs showing disordered arrangement.
- AEC II migration was significantly inhibited, while LF migration was promoted under hyperoxia.
- Increased intracellular ROS levels and elevated apoptosis rates were observed in both cell types with prolonged hyperoxia exposure.
Conclusions:
- High oxygen concentrations negatively impact lung cell growth and function.
- Hyperoxia alters cell migration patterns, inhibiting AEC II and promoting LFs.
- Increased ROS production under hyperoxia is a key mechanism leading to lung cell apoptosis.
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