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Updated: Jul 10, 2026
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High Resolution Whole Mount In Situ Hybridization within Zebrafish Embryos to Study Gene Expression and Function
Published on: October 19, 2013
Zebrafish cdc25a is expressed during early development and limiting for post-blastoderm cell cycle progression
Damian E Dalle Nogare1, Andrea Arguello, Shelley Sazer
1Department of Biochemistry and Cell Biology, Rice University, Houston, Texas 77005, USA.
Summary
Zebrafish cdc25a and cdc25d genes promote cell proliferation. Cdc25a is widely expressed and rate-limits cell cycle progression during zebrafish gastrulation, while cdc25d has limited early expression.
Area of Science:
- Developmental Biology
- Cell Cycle Regulation
- Molecular Genetics
Background:
- Cdc25 phosphatases are crucial regulators of eukaryotic cell cycle progression.
- Understanding their spatiotemporal dynamics is key to deciphering vertebrate development.
Purpose of the Study:
- To isolate and characterize two cdc25 genes (cdc25a and cdc25d) in zebrafish (Danio rerio).
- To investigate their roles in cell cycle progression during early vertebrate development.
Main Methods:
- Gene isolation and characterization in zebrafish.
- Functional complementation assays in Schizosaccharomyces pombe.
- Expression pattern analysis using zebrafish embryos.
- Assessment of effects on cell cycle entry.
Main Results:
- Zebrafish cdc25a and cdc25d genes exhibit proliferation-promoting activity.
- Zebrafish cdc25a is likely the orthologue of tetrapod Cdc25A; cdc25d's origin is unclear.
- Only cdc25d could rescue a fission yeast cdc25 mutation.
- cdc25d shows limited early expression, whereas cdc25a is widely expressed in mitotic domains.
- cdc25a accelerates cell entry into mitosis, indicating it's rate-limiting during gastrulation.
Conclusions:
- Zebrafish cdc25a plays a critical role in regulating cell cycle progression during gastrulation.
- Differential expression patterns of cdc25a and cdc25d suggest distinct roles in zebrafish development.
