An agent-based modelling framework to study growth mechanisms in EGFR-L858R mutant cell alveolar type II cells

Area of Science:

• Oncology
• Molecular Biology
• Biophysics

Background:

• Epidermal growth factor receptor (EGFR) mutations are prevalent in non-small cell lung cancer (NSCLC), especially in never-smokers.
• These mutations have been found in histologically normal lung tissue, suggesting they may not always be immediately carcinogenic.
• The role of EGFR mutations in healthy lung stem cells and their potential to initiate cancer remains unclear.

Purpose of the Study:

• To investigate the functional consequences of EGFR mutations in healthy lung stem cells.
• To understand how specific EGFR mutations, like L858R, affect cell behavior and tissue organization.
• To explore the potential link between EGFR mutation-induced structural changes and non-small cell lung cancer (NSCLC) development.

Main Methods:

• Culturing murine alveolar type II organoids monoclonally in a three-dimensional Matrigel.
• Introducing the EGFR-L858R mutation into organoids.
• Observing and comparing the structural morphology of mutated versus non-mutant organoids.
• Utilizing on-lattice computational simulations to model cell division patterns.

Main Results:

• The EGFR-L858R mutation induced significant structural changes in organoids, characterized by increased 'budding' compared to the spherical shape of non-mutant controls.
• Computational simulations suggested that this budding phenotype arises from concentrated cell division on the organoid surface.
• Spatial heterogeneity in growth was observed, though the precise cell-based mechanisms require further investigation.

Conclusions:

• The spatial environment where an EGFR mutation occurs may influence tumorigenesis.
• EGFR-L858R mutations can alter lung stem cell organoid structure, potentially impacting non-small cell lung cancer (NSCLC) progression.
• These findings may inform future cancer prevention strategies and enhance our understanding of NSCLC development.