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Related Experiment Video

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Light Sheet Microscopy Imaging and Mounting Strategies for Early Zebrafish Embryos
08:33

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Published on: July 19, 2024

Illuminating cell-cycle progression in the developing zebrafish embryo.

Mayu Sugiyama1, Asako Sakaue-Sawano, Tadahiro Iimura

  • 1Laboratory for Cell Function and Dynamics, Advanced Technology Development Group, Brain Science Institute, RIKEN, 2-1 Hirosawa, Wako-city, Saitama 351-0198, Japan.

Proceedings of the National Academy of Sciences of the United States of America
|November 20, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed a new Fucci system for zebrafish, enabling visualization of cell cycle progression. This system uses zebrafish proteins to track cell division dynamics in developing embryos, revealing novel cell-cycle transition waves.

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Area of Science:

  • Developmental Biology
  • Cell Biology
  • Molecular Biology

Background:

  • The Fucci technique visualizes cell cycle phases (G1, S/G2/M) using fluorescent markers based on Cdt1 and geminin.
  • Transgenic mice expressing Fucci markers aid in studying cell cycle coordination with morphogenesis.
  • Adapting Fucci for zebrafish offers optical advantages but faced challenges with mammalian markers.

Purpose of the Study:

  • To develop a functional Fucci derivative for zebrafish embryos using homologous proteins.
  • To visualize cell proliferation and cell-cycle transitions in developing zebrafish.
  • To investigate the conservation and adaptation of cell-cycle regulatory pathways across species.

Main Methods:

  • Generated a novel Fucci system using zebrafish homologs of Cdt1 and geminin.
  • Utilized the Cul4(Ddb1)-mediated Cdt1 degradation pathway for G1 marker development.
  • Observed cell proliferation dynamics in whole zebrafish embryos.

Main Results:

  • Successfully created a zebrafish-specific Fucci system for live imaging of cell proliferation.
  • Identified two distinct anterior-to-posterior waves of cell-cycle transitions (G1/S and M/G1) in the notochord.
  • Demonstrated the efficacy of a conserved Cdt1 degradation pathway for non-mammalian Fucci development.

Conclusions:

  • A novel Fucci system adapted for zebrafish enables comprehensive visualization of cell cycle dynamics.
  • The study reveals previously uncharacterized spatiotemporal patterns of cell-cycle progression during zebrafish development.
  • Conserved metazoan Cdt1 degradation pathways are effective for engineering cross-species cell cycle reporters.