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Shaping tissues with defects.

John W C Dunlop^1,2, Łucja Kowalewska³

¹Department of Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, Salzburg, Austria.

Science (New York, N.Y.)

|April 16, 2026

Summary

This summary is machine-generated.

Topological defects, which are geometric features, guide the self-assembly of living cell sheets into predictable patterns. This research reveals how these defects control tissue morphogenesis.

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Area of Science:

Biophysics
Developmental Biology
Materials Science

Background:

Living cell sheets exhibit complex self-organization behaviors.
Understanding the physical principles governing tissue morphogenesis is crucial.

Purpose of the Study:

To investigate the role of topological defects in directing the structural organization of living cell sheets.
To establish a predictive framework for cell sheet morphogenesis based on geometric features.

Main Methods:

Utilized computational modeling to simulate cell sheet dynamics.
Analyzed the impact of varying topological defect densities and types.
Correlated defect geometry with emergent tissue structures.

Main Results:

Topological defects act as key organizers, dictating the final architecture of cell sheets.
Specific geometric features of defects directly correlate with predictable structural outcomes.
Demonstrated that defects encode information for tissue pattern formation.

Conclusions:

Topological defects are fundamental to understanding how geometric information is translated into biological structures.
This work provides a new paradigm for controlling and predicting cell sheet self-assembly.
Highlights the interplay between geometry and active matter in developmental processes.