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Related Experiment Video

Updated: May 22, 2026

Studying Wnt Signaling During Patterning of Conducting Airways

Studying Wnt Signaling During Patterning of Conducting Airways

Published on: October 16, 2016

Shape self-regulation in early lung morphogenesis.

Raphaël Clément¹, Pierre Blanc, Benjamin Mauroy

¹Laboratoire Matière & Systèmes Complexes, UMR CNRS 7057, University Paris Diderot, Paris, France. raphael.clement@unice.fr

|May 23, 2012

Summary

This summary is machine-generated.

Lung airway branching is driven by fibroblast growth factor 10 (FGF10) diffusion, which causes differential epithelial growth. This process spontaneously creates a self-avoiding, space-filling tree without needing encoded branching instructions.

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Area of Science:

Developmental Biology
Computational Biology
Morphogenesis

Background:

Mammalian lung airways exhibit complex arborescent architecture due to repeated endodermal branching.
Key molecular signals like Fibroblast Growth Factor 10 (FGF10) and Sonic Hedgehog (Shh) are known to regulate lung growth and branching.
The precise mechanism and organ-scale organization of lung branching remain incompletely understood.

Purpose of the Study:

To model the mechanism of lung airway branching driven by FGF10 diffusion.
To investigate how branching events are organized at the organ scale to form a self-avoiding tree.
To determine if specific branching information or master routines are required for lung morphogenesis.

Main Methods:

Developed a computational model simulating FGF10 diffusion from distal mesenchyme.
Coupled epithelial and mesenchymal growth calculations based on FGF10 signaling.
Analyzed the resulting Laplacian dynamics and gene patterning.

Main Results:

FGF10 diffusion from the mesenchyme induces differential epithelial proliferation, leading to spontaneous branching.
The model accurately reproduces the patterning of FGF10-induced genes.
The simulation results in a self-avoiding and space-filling tree structure, suggesting no pre-encoded branching information is necessary.

Conclusions:

Lung airway branching can arise from simple FGF10 diffusion and differential growth responses.
Organ-scale branching organization does not require explicit branching instructions or master routines.
The model provides insights into key mechanisms of lung development and may apply to other branched organs.