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Elastocapillary Instability in Mitochondrial Fission.

David Gonzalez-Rodriguez1, Sébastien Sart1, Avin Babataheri1

  • 1Laboratoire d'Hydrodynamique, Ecole Polytechnique, CNRS UMR 7646, 91128 Palaiseau, France.

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Summary
This summary is machine-generated.

Mitochondrial fission, a key process for cell health, is explained by a new elastocapillary mechanical instability model. This study reveals how fluid mechanics principles govern mitochondrial shape and division.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Mechanobiology

Background:

  • Mitochondria are vital organelles with dynamic fission and fusion processes.
  • These processes are crucial for maintaining cellular physiology and mitochondrial morphology.
  • Existing models do not fully explain the physical mechanisms driving mitochondrial fission.

Purpose of the Study:

  • To propose and validate an elastocapillary mechanical instability mechanism for mitochondrial fission.
  • To investigate the role of mitochondrial morphology in fission events.
  • To demonstrate the applicability of fluid mechanics to mitochondrial dynamics.

Main Methods:

  • Experimentally inducing mitochondrial fission via plasma membrane rupture.
  • Conducting a stability analysis to model fission dynamics.
  • Correlating theoretical predictions with observed fission patterns.

Main Results:

  • An elastocapillary mechanical instability mechanism successfully explains mitochondrial fission.
  • The model accurately predicts the observed fission wavelength.
  • Mitochondrial morphology significantly influences the occurrence of fission.

Conclusions:

  • Elastocapillary forces provide a fundamental mechanism for mitochondrial fission.
  • Fluid mechanics principles can effectively describe mitochondrial morphology and dynamics.
  • This work offers new insights into the biophysical regulation of organelle division.