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Twin Xenopus laevis embryos appearing from flattened eggs
1Department of Biochemistry, Hamamatsu University School of Medicine.
Summary
Metal oxide pulse treatment of Xenopus laevis eggs can induce secondary axis formation, leading to twin embryos. Zirconium oxide proved most effective in this developmental biology study.
Area of Science:
- Developmental Biology
- Molecular Biology
- Embryology
Background:
- Recent advancements in understanding double axis formation in Xenopus laevis.
- Focus on external stimuli rather than gene expression for axis induction.
Purpose of the Study:
- To investigate the potential of pulse treatment to induce secondary axis formation in fertilized Xenopus laevis eggs.
- To identify effective agents for inducing twin embryo formation.
Main Methods:
- Fertilized Xenopus laevis eggs were treated with metal oxides within 3 minutes of insemination.
- Zirconium oxide (ZrO2) was identified as the most effective agent.
- Eggs were dejellied and washed within 7 minutes; flattening was monitored.
Main Results:
- Pulse treatment with metal oxides, particularly ZrO2, resulted in the appearance of twin embryos.
- Eggs exhibiting a flattening degree less than 0.4 degrees at the 16- and 32-cell stages frequently formed twin embryos.
- Metal oxide treatment altered the third cleavage pattern to meridional, contrasting with the normal horizontal cleavage.
Conclusions:
- External pulse treatment with specific metal oxides can successfully induce secondary axis formation and twin embryos in Xenopus laevis.
- Egg flattening degree and altered cleavage patterns are indicators of successful twin embryo induction.
- This method offers an alternative approach to studying axis formation, independent of gene expression studies.
