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Related Experiment Videos

Fundulus deep cells: directional migration in response to epithelial wounding.

R D Fink1, J P Trinkaus

  • 1Department of Biological Sciences, Mount Holyoke College, South Hadley, Massachusetts 01075.

Developmental Biology
|September 1, 1988
PubMed
Summary

Killifish deep cells exhibit random migration but rapidly move directionally towards yolk sac wounds. This rapid aggregation, driven by a potential wound attractant, offers a model for studying cell movement.

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Area of Science:

  • Developmental biology
  • Cell biology
  • Embryogenesis research

Background:

  • During killifish embryogenesis, deep cells normally migrate randomly.
  • These cells utilize blebbing locomotion and exhibit directional persistence.

Purpose of the Study:

  • To investigate the in vivo directional cell migration of killifish deep cells towards wounded yolk sac epithelium.
  • To establish Fundulus heteroclitus as a model system for observing directional cell movements.

Main Methods:

  • Utilizing the transparent Fundulus heteroclitus embryo for observation.
  • Employing time-lapse video micrography to record cell locomotion and aggregation.
  • Inducing controlled wounding of the yolk sac epithelium.

Main Results:

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  • Deep cells rapidly reorient and migrate directionally towards the wound site upon injury.
  • Significant cell aggregation occurs within 100 minutes, with cells up to 800 microns away responding.
  • Cellular morphology and locomotion modes remain consistent between wounded and unwounded embryos.

Conclusions:

  • Wounding imposes a directional cue on a large population of deep cells, leading to aggregation.
  • The rapid and widespread response suggests a diffusible attractant originating from the wound site.
  • Fundulus embryogenesis provides a valuable model for studying in vivo directional cell migration and wound healing.