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Shape Memory Polymers for Active Cell Culture
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Volume Changes During Active Shape Fluctuations in Cells.

Alessandro Taloni1,2, Elena Kardash3, Oguz Umut Salman1,4

  • 1CNR-Consiglio Nazionale delle Ricerche, Istituto per l'Energetica e le Interfasi, Via Roberto Cozzi 53, 20125 Milano, Italy.

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Summary
This summary is machine-generated.

Cell shape changes, like bleb formation, require water transport. A permeable cell membrane is essential for these dynamic morphological changes, challenging previous assumptions.

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Area of Science:

  • Cell biology
  • Biophysics
  • Mechanobiology

Background:

  • Cells regulate volume via osmotic pressure.
  • Active cell shape changes are typically assumed to have minimal volume fluctuations.
  • Blebs are common plasma membrane protrusions driven by cortex contraction.

Purpose of the Study:

  • To investigate the role of water transport in cell bleb formation.
  • To challenge the assumption that active shape variations do not involve significant volume changes.
  • To explore the interplay between hydrodynamics and elasticity in cell morphology.

Main Methods:

  • Experimental observation of cell protrusions.
  • Development and simulation of a fluid-mediated membrane-cortex deformation model.
  • Analysis of cell membrane permeability effects on bleb formation.

Main Results:

  • Water transport into and out of the cell is crucial for bleb formation.
  • A permeable cell membrane is necessary for proper bleb development.
  • Bleb formation is impaired in cells with impermeable membranes.

Conclusions:

  • Cell blebbing is a hydrodynamically dependent process.
  • Membrane permeability and water transport are critical factors in active cell morphological changes.
  • The study highlights the balance between fluid dynamics and cell mechanics in cellular processes.