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Updated: Jul 11, 2025

Live Imaging of Apoptotic Cell Clearance during Drosophila Embryogenesis
Published on: August 18, 2013
Assessing mechanical agency during apical apoptotic cell extrusion
Sommer Anjum1, Llaran Turner2,3, Youmna Atieh2
1Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
Cell extrusion in epithelia, vital for tissue homeostasis, is primarily driven by cell-autonomous factors, not the surrounding mechanical environment. This finding emerges from a novel biophysical model simulating cell removal processes.
Area of Science:
- Epithelial biology
- Biophysics
- Computational modeling
Background:
- Epithelial tissues require cell turnover to maintain homeostasis and barrier function.
- Cell extrusion removes unfit, excess, or dying cells, preventing defective cell accumulation.
- Oscillatory cell area changes accompany extrusion in zebrafish larval tail fin epithelia.
Conclusions:
- Cell-autonomous mechanisms are key to epithelial cell extrusion.
- The developed computational model provides insights into homeostatic tissue maintenance.
- Localized mechanical changes and cellular dynamics facilitate the removal of unwanted cells.
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