Spatial Clustering of Adhesion-Deficient Cells Controls Epithelial Tissue Rigidity, Study Shows
A computational study using vertex modeling demonstrates that how adhesion-deficient cells are spatially arranged in epithelial tissue—not just their number—determines whether the tissue loses mechanical rigidity. Clustered mutant cells cause sustained mechanical changes through sequential boundary removal, while randomly distributed ones are rapidly eliminated with minimal lasting effects. The findings suggest spatial organization is a key factor in early-stage cancer progression and epithelial-mesenchymal transition.
Researchers used a two-dimensional vertex model to simulate how epithelial tissues respond to cells lacking E-cadherin-mediated adhesion, a hallmark of cancer progression. The study found that while increasing the fraction of adhesion-deficient cells drives tissues toward reduced mechanical rigidity, spatial organization acts as an independent structural variable with equal or greater importance. Clustered mutant cells undergo sequential boundary removal that delays their elimination and sustains elevated cellular shape index in surrounding tissue, creating persistent topological disorder that persists even after the mutant cells are cleared. In contrast, randomly distributed mutant cells are rapidly removed through isolated T2-mediated events with only transient mechanical perturbations. These results establish spatial organization as a key determinant of epithelial rigidity transitions, with direct implications for understanding how local adhesion defects propagate to tissue-scale mechanical changes during early-stage cancer progression.
Limitations & open questions
The study relies on computational modeling and does not present experimental validation in biological tissues or cell cultures. The authors do not discuss how their two-dimensional vertex model assumptions might differ from three-dimensional in vivo epithelial behavior, nor do they address potential limitations in translating these findings to actual cancer progression in living organisms.
What different sources said
- bioRxivCenter
Spatial clustering of adhesion-deficient cells controlsepithelial rigidity transitions
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