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Updated: Apr 25, 2026

Imaging Cell Shape Change in Living Drosophila Embryos
Published on: March 30, 2011
Passive mechanical forces control cell-shape change during Drosophila ventral furrow formation
Oleg Polyakov1, Bing He2, Michael Swan2
1Department of Physics, Princeton University, Princeton University, Princeton, New Jersey.
Drosophila gastrulation involves cell shape changes to form a ventral furrow. This study shows that maintaining cell volume and specific membrane stiffness are key to this process, driven by apical constriction.
Area of Science:
- Developmental Biology
- Cell Biology
- Biophysics
Background:
- Drosophila gastrulation involves ventral furrow (VF) formation through apical constriction and cell internalization.
- The transmission of forces during VF formation is not fully understood.
- Apical constriction is known to be essential for VF development.
Purpose of the Study:
- To investigate the role of passive mechanical properties in cellular blastoderm during gastrulation.
- To understand how apical constriction forces transmit through cells.
- To elucidate the mechanism driving ventral furrow formation.
Main Methods:
- Development of a computational vertex model.
- Analysis of cell volume conservation during invagination.
- Modeling region-specific membrane elasticities.
Main Results:
- Cell volume is conserved during apical constriction and invagination.
- Constant cell volume combined with region-specific membrane elasticity drives invagination passively.
- Basal membrane rigidity transitions are critical for the sequence of cell-shape changes in VF formation.
Conclusions:
- Passive mechanical properties, specifically conserved cell volume and membrane stiffness, are sufficient for ventral furrow formation.
- No active force generation beyond apical constriction is required.
- The model explains the observed cell-shape changes during Drosophila gastrulation.
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