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Differences in cell death and division rules can alter tissue rigidity and fluidization.

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Cell death and division significantly impact tissue mechanics and behavior. The specific triggers for these cellular events further influence tissue properties and dynamics, affecting health and disease states.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Computational Biology

Background:

  • Tissue mechanical properties, including rigidity and fluidity, are crucial in biological processes and disease.
  • Jamming-unjamming transitions (UJT) are key to understanding tissue mechanics, but the role of cell death and division has been overlooked.
  • Cellular apoptosis and mitosis significantly alter tissue properties and their balance is critical for tissue homeostasis.

Purpose of the Study:

  • To investigate the impact of cell death and division on tissue mechanical properties.
  • To model the influence of mechanosensitive triggers for cell death and division within silico tissue dynamics.
  • To analyze how cell death and division, and their triggering rules, affect cell migration, tissue response to stress, extrusion, and self-organization.

Main Methods:

  • Development of in silico models of tissue dynamics.
  • Incorporation of mechanosensitive triggers for cell death (apoptosis) and cell division (mitosis) based on cell size and geometry.
  • Simulation of tissue behavior including cell migration, response to external stress, extrusion propensity, and self-organization.

Main Results:

  • Cell death and division events significantly alter tissue mechanics compared to systems without these events.
  • The specific triggers initiating cell death and division influence predicted tissue mechanics.
  • The rules governing cell death and division impact overall tissue behavior and self-organization.

Conclusions:

  • Cell death and division are critical factors influencing tissue mechanical properties and dynamics.
  • The mechanosensitive rules governing cell death and division play a significant role in determining tissue behavior.
  • Understanding these dynamics is essential for comprehending tissue function in health and disease, particularly in cancer progression.