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Zebrafish epiboly: Spreading thin over the yolk.

Ashley E E Bruce1

  • 1Department of Cell and Systems Biology, University of Toronto, Toronto, ON, Canada.

Developmental Dynamics : an Official Publication of the American Association of Anatomists
|October 6, 2015
PubMed
Summary

Zebrafish epiboly involves coordinated cell movements to engulf the yolk. Recent research clarifies the roles of actomyosin, epithelial spreading, and cell adhesion in this crucial developmental process.

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Camsap2a regulates actomyosin flow and Rab5ab-mediated macropinocytosis in the yolk cell during zebrafish epiboly.

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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Genetics

Background:

  • Epiboly is a fundamental morphogenetic movement essential for animal development.
  • In zebrafish, epiboly drives gastrulation by expanding tissues to enclose the yolk and close the blastopore.
  • Understanding epiboly provides insights into cell intercalation, adhesion, signaling, and epithelial morphogenesis.

Purpose of the Study:

  • To review recent findings on zebrafish epiboly.
  • To elucidate the mechanisms driving epiboly, focusing on actomyosin motors, epithelial layer spreading, and cell adhesion.
  • To integrate new insights into the current understanding of epiboly and discuss future research directions.

Main Methods:

  • Review of recent scientific literature on zebrafish epiboly.
Keywords:
E-cadherinactomyosincell adhesionenveloping layerepithelial morphogenesisgastrulationintercalationintercellular migrationmorphogenesisteleostyolk syncytial layerzebrafish

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  • Focus on studies investigating actomyosin function in the yolk cell.
  • Analysis of mechanisms governing the enveloping layer's spread and deep cell movement regulation by E-cadherin.

    • Main Results:

    • Actomyosin motors in the yolk cell play a key role in driving epiboly.
    • Specific mechanisms underlying the epithelial enveloping layer's spreading have been identified.
    • E-cadherin-based adhesion regulates deep cell movements during epiboly.

    Conclusions:

    • Recent advances have significantly improved our understanding of zebrafish epiboly.
    • The study of zebrafish epiboly offers broadly applicable insights into morphogenesis.
    • Future research will further refine our knowledge of the genetic, molecular, and cellular controls of this process.