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Generation of ESC-derived Mouse Airway Epithelial Cells Using Decellularized Lung Scaffolds

Generation of ESC-derived Mouse Airway Epithelial Cells Using Decellularized Lung Scaffolds

Published on: May 5, 2016

Mechanically patterning the embryonic airway epithelium.

Victor D Varner¹, Jason P Gleghorn¹, Erin Miller²

¹Department of Chemical & Biological Engineering, Princeton University, Princeton, NJ 08544;

Proceedings of the National Academy of Sciences of the United States of America

|July 15, 2015

Summary

Physical forces, not just molecular signals, drive spatial patterning in developing tissues. A growth-induced instability in epithelial cells dictates branching patterns in the embryonic airway, independent of surrounding tissues.

Keywords:

buckling instability mechanical stress morphodynamics morphogenesis

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Area of Science:

Developmental biology
Biophysics
Tissue morphogenesis

Background:

Embryonic development requires precise spatial patterning of cells to form complex tissue architectures.
Reciprocal signaling between epithelial and mesenchymal tissues is a known mechanism for pattern generation, as seen in lung airway formation.
Reaction-diffusion kinetics of molecular signals are traditionally thought to create biochemical patterns that guide tissue development.

Purpose of the Study:

To investigate the role of purely physical mechanisms in spatial patterning during embryonic development.
To determine if physical instabilities can drive pattern formation in epithelial tissues independently of mesenchymal influence.
To elucidate the contribution of physical processes to the morphogenesis of the developing murine airway epithelium.

Main Methods:

Studied spatial patterning in developing murine airway epithelium.
Investigated the role of physical instabilities in the absence of mesenchyme.
Analyzed the relationship between epithelial growth rates and branching patterns.

Main Results:

Demonstrated that a growth-induced physical instability can drive spatial patterning within embryonic epithelia.
Showed that this physical mechanism operates independently of surrounding mesenchyme in airway branching.
Found that the dominant wavelength of the instability, controlled by epithelial growth rates, dictates the branching pattern.

Conclusions:

Physical mechanisms, specifically growth-induced instability, can independently drive spatial patterning in embryonic epithelia.
These physical processes play a crucial role in tissue morphogenesis, such as the branching of the lung airway.
The findings challenge the exclusive reliance on molecular signaling for pattern formation, highlighting the importance of biophysical forces.