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Related Experiment Video

Updated: May 1, 2026

Characterizing Epithelial Wound Healing In Vivo Using the Cnidarian Model Organism Clytia hemisphaerica
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Recapitulation of morphogenetic cell shape changes enables wound re-epithelialisation.

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  • 1Schools of Biochemistry and, Physiology and Pharmacology, Faculty of Medical and Veterinary Sciences, University of Bristol, University Walk, Bristol BS8 1TD, UK.

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Cells behind the wound edge actively contribute to tissue repair by rearranging junctions and driving cell intercalation. This process, dependent on actomyosin pulses, is crucial for efficient wound healing and tissue regeneration.

Keywords:
Actomyosin behaviourDrosophila embryoWound healing

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Area of Science:

  • Cell biology
  • Developmental biology
  • Tissue repair mechanisms

Background:

  • Wound repair is essential for tissue homeostasis and mirrors embryonic morphogenesis.
  • Epithelial wound healing involves actomyosin dynamics at the leading edge and cell rearrangements.
  • Previous research focused on front-row cells, neglecting the role of cells further back.

Purpose of the Study:

  • To investigate the role of cells located behind the wound edge in epithelial wound repair.
  • To understand the cellular mechanisms driving wound closure beyond the leading edge.

Main Methods:

  • Microscopy to observe cell behavior and actomyosin dynamics.
  • Genetic or chemical inhibition of actomyosin activity.
  • Analysis of cell junction dynamics and rearrangements.

Main Results:

  • Cells behind the wound edge stretch and undergo anterior-posterior cell intercalation.
  • Actomyosin pulses drive junction shrinkage, targeted to Par3 breaks at vertices.
  • Inhibiting actomyosin dynamics in these rear cells impedes junction shrinkage and wound closure.

Conclusions:

  • Cells behind the wound edge actively participate in wound repair through intercalation.
  • Actomyosin-dependent junction remodeling is critical for efficient wound edge advancement.
  • These findings reveal conserved mechanisms between wound healing and embryonic tissue elongation.