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Spatial Separation of Molecular Conformers and Clusters
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Segregation in Binary Mixture with Differential Contraction among Active Rings.

Emanuel F Teixeira1, Carine P Beatrici1, Heitor C M Fernandes1

  • 1Universidade Federal do Rio Grande do Sul, Instituto de Física, CP 15051, CEP 91501-970 Porto Alegre-Rio Grande do Sul, Brazil.

Physical Review Letters
|April 18, 2025
PubMed
Summary
This summary is machine-generated.

Cell cortex contraction drives cell shape changes and segregation in multicellular organisms. Our model shows differential ring contraction causes segregation, with activity acting as an effective temperature.

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Area of Science:

  • Cell biology
  • Biophysics
  • Theoretical biology

Background:

  • Cell cortex contraction is essential for fundamental cellular processes like movement, division, and mechanosensing.
  • Differential membrane contractions between cells play a significant role in cell segregation.
  • Understanding the physical mechanisms driving cell segregation is crucial for developmental biology.

Purpose of the Study:

  • To model the physical mechanisms underlying cell segregation driven by differential cell cortex contraction.
  • To investigate the relationship between active particle ring dynamics and segregation phenomena.
  • To compare model predictions with existing theories of cluster fusion and diffusion.

Main Methods:

  • Development of a computational model simulating active particle rings with differential contraction.
  • Analysis of segregation dynamics arising from the interaction of these active rings.
  • Calculation of the interface decay exponent to characterize segregation behavior.

Main Results:

  • Segregation of cell populations arises directly from differential contraction of active particle rings.
  • The activity of the rings effectively functions as a temperature parameter influencing segregation.
  • The interface decay exponent was found to be approximately λ∼1/3, deviating from predictions of other models.

Conclusions:

  • Differential cell cortex contraction is a viable mechanism for driving cell segregation.
  • Active ring dynamics provide a novel framework for understanding cell sorting and tissue morphogenesis.
  • The observed interface decay exponent suggests unique physical principles govern segregation in this active system.