Negative Transpulmonary Pressure Disrupts Airway Morphogenesis by Suppressing Fgf10

Area of Science:

• Developmental Biology
• Mechanobiology
• Pulmonology

Background:

• Mechanical forces influence cell and tissue development, particularly during organogenesis.
• Transpulmonary pressure is crucial for fetal lung development; defects are linked to underdeveloped lungs.

Purpose of the Study:

• To investigate the effects of negative transpulmonary pressure on embryonic airway branching morphogenesis.
• To explore the role of fibroblast growth factor 10 (FGF10) in this process.

Main Methods:

• Developed a novel culture model for embryonic airways.
• Applied negative transpulmonary pressure to cultured embryonic lungs.
• Assessed branching and FGF10 expression.
• Supplemented cultures with exogenous FGF10.

Main Results:

• Negative transpulmonary pressure significantly decreased airway branching.
• This decrease was partly mediated by altered fibroblast growth factor 10 (FGF10) expression.
• Exogenous FGF10 rescued lung morphogenesis under negative pressure.

Conclusions:

• Transpulmonary pressure mechanically regulates FGF10 expression during airway development.
• FGF10 is a key mediator of mechanical signaling in lung morphogenesis.
• Understanding these pathways may enable new non-surgical treatments for congenital lung defects.